CN215310188U - Model car - Google Patents

Abstract

The utility model discloses a model car. The model car includes fixing base, drive arrangement and base, and drive arrangement connects in the fixing base, including first motor, drive shaft, first drive assembly and second drive assembly, first motor can pass through first drive assembly drive the second drive assembly rotates, and second drive assembly is used for the drive shaft to rotate, and the both ends of drive shaft are connected with the drive wheel. The first motor of the model car can drive the second driving assembly to rotate through the first driving assembly, and then the second driving assembly enables the driving shaft to rotate, so that the driving wheels are driven to rotate, and the purpose of enabling the model car to move is achieved.

Description

Model car

Technical Field

The utility model relates to the technical field of model cars, in particular to a model car.

Background

The existing model car is limited by the size of a field, and is generally required to be compact and small in structure and high in control precision. The existing model vehicles on the market are usually provided with a driving device which is used for providing power for the model vehicles, and the existing driving device has a complex structure and occupies a larger internal space of the model vehicles, so that the existing model vehicles have a structure which is not compact and small enough and cannot be used in many places.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. To this end, the utility model proposes a model vehicle having a compact structure.

A model car according to an embodiment of the first aspect of the utility model, the model car comprising: fixing base, drive arrangement and base, drive arrangement connect in the fixing base, including first motor, drive shaft, first drive assembly and second drive assembly, first motor can pass through first drive assembly drive second drive assembly rotates, second drive assembly is used for the drive shaft rotates, the both ends of drive shaft are connected with the drive wheel. .

The model car provided by the embodiment of the utility model at least has the following technical effects:

the first motor of the model car can drive the second driving assembly to rotate through the first driving assembly, and then the second driving assembly enables the driving shaft to rotate, so that the driving wheels are driven to rotate, and the purpose of enabling the model car to move is achieved.

According to some embodiments of the present invention, the first driving assembly includes a first gear and a worm, the second driving assembly includes a second gear, the first motor includes a first rotating shaft, the first rotating shaft is connected to the first gear, the first gear rotates coaxially with the worm, the worm is engaged with the second gear, the second gear is sleeved on the driving shaft, and a friction angle between the second gear and the worm is larger than a deployment helix angle of the worm.

According to some embodiments of the present invention, the first driving assembly includes a first gear, a third gear, and a worm, the second driving assembly includes a second gear, the first motor includes a first rotating shaft, the first rotating shaft is connected to the first gear, the first gear is engaged with the third gear, the third gear rotates coaxially with the worm, the worm is engaged with the second gear, the second gear is sleeved on the driving shaft, and a transmission ratio of the first gear to the third gear is less than 1.

According to some embodiments of the utility model, the first driving assembly comprises a first gear, a first helical gear, a first reduction gear and a fourth gear, the second driving assembly comprises a second helical gear, the first motor comprises a first rotating shaft, the first rotating shaft is connected to the first gear, the first reduction gear is used for reducing the rotating speed of the first gear transmitted to the fourth gear, the fourth gear and the first helical gear rotate coaxially, and the first helical gear is meshed with the second helical gear.

According to some embodiments of the utility model, the first helical gear has a length of between 5 and 6 mm, the second helical gear has a length of between 4 and 5 mm, the first and second helical gears each have a modulus of between 0.1 and 0.5, the pressure angle each has a magnitude of between 10 ° and 30 °, and the helix angle each has a magnitude of between 20 ° and 45 °.

According to some embodiments of the utility model, a gear ratio of the first beveled gear and the second beveled gear is between 5/4 and 3.

According to some embodiments of the present invention, the first helical gear has a tooth space between 1.3 and 1.8, a tooth space between 2, and an index of-0.35, and the second helical gear has a tooth space between 1.4 and 1.5, a tooth space between 2, and an index of 0.25.

According to some embodiments of the utility model, the model car further comprises a first fixing shaft, the first helical gear is sleeved on the first fixing shaft, the model car further comprises a plurality of first shaft sleeves, and the first shaft sleeves are sleeved on the first fixing shaft.

According to some embodiments of the utility model, the model car further comprises a base and a second bushing, the second bushing is sleeved on the driving shaft, and the fixed seat and the base are in surface contact with the second bushing.

According to some of the embodiments of the present invention, the second sleeve is provided with a first through hole, and the first through hole is located at a left end or a right end of the second sleeve.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic view of a model car according to an embodiment of the present invention;

FIG. 2 is a schematic view of a driving apparatus of a model car according to an embodiment of the present invention;

fig. 3 is a schematic view showing a structure of a driving apparatus of the model vehicle in fig. 2;

fig. 4 is a top view of the drive of the mold vehicle of fig. 3;

FIG. 5 is a schematic structural view of a second bushing of the model car according to an embodiment of the present invention;

fig. 6 is a schematic structural view of a model car according to an embodiment of the present invention.

Reference numerals:

the vehicle comprises a vehicle shell 10, a base 20, a driving wheel 30, a steering wheel 40 and a fixed seat 100;

the driving device 200, the first motor 210, the first rotating shaft 211, the first gear 221, the second gear 222, the third gear 223, the fourth gear 224, the worm 225, the first helical gear 226, the second helical gear 227, the first fixed shaft 230, the first bushing 231, the driving shaft 240, the second bushing 241, the first through hole 242, the contact surface 243, the first reduction gear 250, the input part 251, and the output part 252.

Detailed Description

The concept and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments to fully understand the objects, features and effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention.

In the description of the embodiments of the present invention, if an orientation description is referred to, for example, the directions or positional relationships indicated by "up", "down", "left", "right", etc., are based on the directions or positional relationships shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the embodiments of the present invention, if a feature is referred to as being "disposed", "connected", or "mounted" to another feature, it can be directly disposed, fixed, or connected to the other feature or indirectly disposed, fixed, or connected to the other feature.

According to the model car of the first aspect of the present invention, the model car comprises a fixing base 100, a driving device 200 and a base 20, the driving device 200 is connected to the fixing base 100, and comprises a first motor 210, a driving shaft 240, a first driving assembly (not labeled in the figure) and a second driving assembly (not labeled in the figure), the first driving assembly is used for changing the direction of power transmitted to the second driving assembly by the first motor 210, so that the first motor 210 can drive the second driving assembly to rotate through the first driving assembly. The second driving assembly is used for driving the driving shaft 240 to rotate, and the driving wheels 30 are connected to both ends of the driving shaft 240. The base 20 is connected to the fixing base 100 and defines an accommodating space (not labeled) with the fixing base 100, and the driving device 200 is disposed in the accommodating space.

Specifically, referring to fig. 2, the worm 225 is a single-wire worm. The first drive assembly includes a first gear 221, a third gear 223, a worm 225, and the second drive assembly includes a second gear 222. The axis of the first shaft 211 of the model car is perpendicular to the axis of the drive shaft 240, and therefore some mechanism is required to change the direction of the power transmitted by the first motor 210 to the second drive assembly. Therefore, the first gear 221 is connected to the first rotating shaft 211 and rotates coaxially with the first rotating shaft 211, the first gear 221 is meshed with the third gear 223, the third gear 223 rotates coaxially with the worm 225, the transmission ratio of the first gear 221 to the third gear 223 is smaller than 1, and therefore the effect of reducing the rotation speed of the gears is achieved, the ratio of the rotation speeds of the driving wheel 30 and the first rotating shaft 211 is reduced, and the third gear 223 and/or the first gear 221 are/is prevented from being cracked due to the fact that the rotation speed of the first rotating shaft 211 is too fast. The worm 225 is engaged with the second gear 222, and the second gear 222 is sleeved on the driving shaft 240. The second gear 220 and the wheel 30 rotate coaxially. Thus, when the first motor 210 is activated, the drive wheel 30 can be rotated by the first drive assembly. Therefore, the model car in the present embodiment can employ the simple driving device 200 while securing the rotation speed, thereby reducing the volume of the model car.

In some embodiments, the friction angle of the second gear 222 and the worm 225 is larger than the unwinding helix angle of the worm 225, so that when the model car needs to be stopped, the first motor 210 can be self-locked between the worm 225 and the second gear 222 when the model car is stopped, and the model car is stopped to achieve a braking effect, so that a device for braking does not need to be additionally arranged in the model car, and the volume of the model car is reduced.

In some embodiments, the first driving assembly comprises a first gear 221, a first bevel gear 226, a first reduction gear 250 and a fourth gear 224, the second driving assembly comprises a second bevel gear 227, the first motor 210 comprises a first rotating shaft 211, the first rotating shaft 211 is connected to the first gear 221, the first reduction gear 250 is used for reducing the rotating speed of the first gear 221 transmitted to the fourth gear 224, the fourth gear 224 and the first bevel gear 226 rotate coaxially, and the first bevel gear 226 is engaged with the second bevel gear 227.

Specifically, referring to fig. 3 and 4, the first gear 221 and the first rotation shaft 211 move coaxially, the first reduction gear 250 includes an input portion 251 and an output portion 252, the input portion 251 and the output portion 252 rotate coaxially, and the number of teeth of the input portion 251 is greater than that of the output portion 252. The axis of the first bevel gear 226 is perpendicular to the axis of the second bevel gear 227. The input portion 251 is engaged with the first gear 221, the output portion 252 is engaged with the fourth gear 224, the fourth gear 224 and the second helical gear 227 rotate coaxially, the first helical gear 226 and the second helical gear 227 are engaged, and the first helical gear 226 and the wheel 30 rotate coaxially. Thus, when the first motor 210 is activated, the drive wheel 30 rotates. Therefore, the model car in this embodiment can reduce the volume of the model car by using the driving device 200 with a simple structure while ensuring the required rotation speed, and can eliminate the self-locking phenomenon of the rotary model car by using the first bevel gear 226 and the second bevel gear 227.

In some embodiments, the first beveled gear 226 is between 5 and 6 millimeters in length, the second beveled gear 227 is between 4 and 5 millimeters in length, both the first beveled gear 226 and the second beveled gear 227 have a modulus between 0.1 and 0.5, both the pressure angle between 10 ° and 30 °, and the helix angle between 20 ° and 45 °. Specifically, referring to fig. 3 and 4, the length of the first bevel gear 226 is 5.6 mm, the length of the second bevel gear 227 is 4.6 mm, the modulus of each of the first bevel gear 226 and the second bevel gear 227 is 0.3, the magnitude of the pressure angle is 20 °, and the magnitude of the helix angle is 45 °, so that the self-locking phenomenon of the worm teeth can be eliminated by the bevel gear set of the first bevel gear 226 and the second bevel gear 227.

In some embodiments, the first bevel gear 226 and the second bevel gear 227 have a gear ratio of 3/2. Specifically, referring to fig. 3 and 4, the first helical gear 226 has 9 teeth and the second helical gear 227 has 6 teeth, thereby making the meshing of the first helical gear 226 and the second helical gear 227 more accurate.

In some embodiments, the first bevel gear 226 has a tooth spacing of between 1.3 and 1.8, a tooth span of 2, and an index of-0.35, and the second bevel gear 227 has a tooth span of between 1.4 and 1.5, a tooth span of 2, and an index of 0.25. Specifically, referring to fig. 3 and 4, the first helical gear 226 has a tooth space of 1.357, a tooth span of 2, and an index coefficient of-0.35, and the second helical gear 227 has a tooth space of 1.446, a tooth span of 2, and an index coefficient of 0.25, thereby ensuring the meshing degree of the first helical gear 226 and the second helical gear 227.

In some embodiments, the model car further comprises a first stationary axle 230, the first bevel gear 226 is sleeved on the first stationary axle 230, the model car further comprises a plurality of first axle sleeves 231, and the first axle sleeves 231 are sleeved on the first stationary axle 230. In particular, referring to fig. 1, 3 and 4, since the size of the components of the model car is too small, it is difficult to precisely secure the aperture of the groove of the first fixing shaft 230 after the base 20 and the holder 100 are assembled, resulting in positional deviation or looseness of the first fixing shaft 230. Therefore, in the model car of this embodiment, the first shaft sleeves 231 are respectively sleeved at the front end and the rear end of the first bevel gear 226, the fixing base 100 is provided with the first groove, and the first shaft sleeves 231 can be clamped in the first groove, so as to avoid the first fixing shaft 230 from shifting in the front-rear direction, and ensure the meshing accuracy of the first bevel gear 226 and the second bevel gear 227 and the meshing accuracy of the whole gear set.

In some embodiments, the model car further comprises a second shaft sleeve 241, the second shaft sleeve 241 is sleeved on the driving shaft 240, and the fixing base 100 and the base 20 are in surface contact with the second shaft sleeve 241. Specifically, referring to fig. 1, 3 and 4, since the size of the components of the model car is too large, it is difficult to accurately ensure the aperture of the groove for fixing the driving shaft 240 after the base 20 and the fixing base 100 are assembled, and the driving shaft 240 is prone to position deviation or looseness, so that the second bushings 241 are sleeved at the left and right ends of the second bevel gear 227, the second bushings 241 are provided with contact surfaces 243, and the contact surfaces 243 are flat surfaces. The contact surface 243 abuts against the fixing base 100 and the base 20 in the vertical direction, so as to fix the driving shaft 240, thereby preventing the driving shaft 240 from shifting or loosening during rotation.

In some embodiments, the second bushing 241 is provided with a first through hole 242, and the first through hole 242 is located at the left or right end of the second bushing 241. Specifically, referring to fig. 5 and 6, the model car further includes steering wheels 40. Since the first through hole 242 is located at the left end of the second bushing 241, if it is necessary to adjust the distance between the driving wheel 30 and the steerable wheel 40, the second bushing 241 can be rotated 180 ° about the center line of the first through hole 242 as a rotation axis, so that the distance between the driving wheel 30 and the steerable wheel 40 can be adjusted.

In some embodiments, since the parameters of the normal modulus, the pressure angle, and the helix angle of the worm may affect the self-locking of the worm, in order to utilize the worm self-locking phenomenon to achieve the braking purpose while ensuring that the volume of the worm 225 is small to avoid the worm occupying too much internal space of the model car, the parameters of the worm 225 need to be adjusted. Referring to fig. 2, the worm 225 has a normal modulus of between 0.1 and 0.5, a pressure angle of between 20 ° and 40 °, a helix angle of between 4.5 ° and 6 °, and a pitch circle diameter of between 2mm and 4 mm. The worm can reach the phenomenon of auto-lock when guaranteeing less volume this moment.

It will be appreciated that, with reference to figure 2, one worm 225 has a normal mode of 0.2, a pressure angle of 20 °, a helix angle of 5.465 °, and a pitch circle diameter of 2.1mm, and the other worm 225 has a normal mode of 0.3, a pressure angle of 20 °, and a pitch circle diameter of 3.4 mm.

In the description herein, references to the description of "some embodiments" mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. Model car, characterized in that includes:

a fixed seat;

drive arrangement, drive arrangement connect in the fixing base, including first motor, drive shaft, first drive assembly and second drive assembly, first motor can pass through first drive assembly drive second drive assembly rotates, second drive assembly is used for the drive shaft rotates, the both ends of drive shaft are connected with the drive wheel.

2. The model car of claim 1, wherein the first drive assembly comprises a first gear and a worm, the second drive assembly comprises a second gear, the first motor comprises a first shaft, the first shaft is connected to the first gear, the first gear rotates coaxially with the worm, the worm is engaged with the second gear, the second gear is sleeved on the drive shaft, and a friction angle between the second gear and the worm is larger than a deployment helix angle of the worm.

3. The model car of claim 1, wherein said first drive assembly comprises a first gear, a third gear, and a worm, said second drive assembly comprises a second gear, said first motor comprises a first shaft, said first shaft is connected to said first gear, said first gear is engaged with said third gear, said third gear rotates coaxially with said worm, said worm is engaged with said second gear, said second gear is sleeved on said drive shaft, and the transmission ratio of said first gear to said third gear is less than 1.

4. The model car of claim 1, wherein said first drive assembly comprises a first gear, a first helical gear, a first reduction gear, and a fourth gear, said second drive assembly comprises a second helical gear, said first motor comprises a first shaft, said first shaft is connected to said first gear, said first reduction gear is configured to reduce the rotational speed of said first gear transmitted to said fourth gear, said fourth gear and said first helical gear rotate coaxially, said first helical gear is engaged with said second helical gear.

5. The model car of claim 4, wherein said first bevel gear has a length of between 5 and 6 mm, said second bevel gear has a length of between 4 and 5 mm, both said first and second bevel gears have a modulus of between 0.1 and 0.5, a pressure angle of between 10 ° and 30 °, and a helix angle of between 20 ° and 45 °.

6. The model car of claim 5, wherein a gear ratio of said first bevel gear to said second bevel gear is between 5/4 and 3.

7. The model car of claim 6, wherein said first helical gear has a tooth space between 1.3 and 1.8, a tooth space between 2 and an index coefficient of minus 0.35, and said second helical gear has a tooth space between 1.4 and 1.5, a tooth space between 2 and an index coefficient of 0.25.

8. The model car of claim 4, further comprising a first stationary shaft, wherein the first bevel gear is sleeved on the first stationary shaft, and further comprising a plurality of first bushings sleeved on the first stationary shaft.

9. The model car of claim 1, further comprising a base and a second bushing, wherein the second bushing is sleeved on the drive shaft, and wherein the fixed seat and the base are in surface contact with the second bushing.

10. The model car of claim 9, wherein the second bushing is provided with a first through hole at a left or right end of the second bushing.

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