Toy car rear wheel driving mechanism

Abstract

The utility model relates to the technical field of toy cars, in particular to a toy car rear wheel driving mechanism which comprises wheels, a driving shaft assembly and a gearbox, the driving shaft assembly is fixedly connected between the two wheels, a chassis is rotatably connected to the outer side of the driving shaft assembly, and a damping device is fixedly connected to the upper end of the chassis. A gearbox is fixedly connected to the upper end of the damping device, a driving shaft assembly penetrates through the gearbox to be fixedly connected with a gear assembly, one end of the gear assembly is fixedly connected to one end of a spindle of a driving motor, the driving motor is mounted on the inner side of the gearbox through bolts, and a lubricating device is fixedly connected to the upper end of the gearbox. The lubricating device comprises an oil box, the inner side of the upper end of the oil box is tightly attached to the outer side of the lower end of the rubber plug, and a connecting pipe is fixedly connected to the outer side of the oil box in a welded mode. The normal running of the toy car is ensured.

Description

Technical Field

[0001] This utility model relates to the field of toy car technology, specifically to a rear-wheel drive mechanism for a toy car. Background Technology

[0002] The rear-wheel drive mechanism of a toy car is mainly used to transmit power to the rear wheel of the toy car, enabling it to drive the vehicle forward or backward. The gear set mainly plays the role of deceleration and torque increase. The motor speed is usually high, but the torque is relatively small, while the rear wheel of the toy car needs enough torque to push the vehicle forward.

[0003] When the battery powers the motor, the motor starts to rotate. The small gear on the motor shaft drives the large gear in the gear set. After multiple stages of gear reduction and torque increase, the power is transmitted to the rear wheel through the transmission shaft, thus propelling the toy car forward or backward.

[0004] When the toy car's rear-wheel drive mechanism is in operation, the vibration of the car body will cause the gearbox to vibrate when the toy car is traveling on an uneven road. When the gearbox vibrates up and down, the relative position of the gears in the vertical direction will change, causing the gears to separate momentarily or be excessively squeezed during meshing, thus generating an impact. The tooth surfaces of the gears will gradually wear down. After the gears wear down, the meshing between the gears will become loose, resulting in unstable power transmission and affecting normal driving.

[0005] Therefore, a rear-wheel drive mechanism for a toy car is proposed to address the above problems. Utility Model Content

[0006] The purpose of this utility model is to provide a rear wheel drive mechanism for a toy car to solve the problem that after the gears wear out, the meshing between the gears will not be tight, resulting in unstable power transmission and affecting normal driving.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A rear-wheel drive mechanism for a toy car includes wheels, a drive shaft assembly, and a gearbox. The drive shaft assembly is fixedly connected between two of the wheels. A chassis is rotatably connected to the outer side of the drive shaft assembly. A shock-absorbing device is fixedly connected to the upper end of the chassis. The gearbox is fixedly connected to the upper end of the shock-absorbing device. The drive shaft assembly passes through the gearbox and is fixedly connected to the gear assembly. One end of the gear assembly is fixedly connected to one end of the main shaft of a drive motor. The drive motor is bolted to the inside of the gearbox. A lubrication device is fixedly connected to the upper end of the gearbox. The lubrication device includes an oil box. The upper inner side of the oil box is in close contact with the lower outer side of the rubber stopper. A connecting pipe is fixedly connected to the outer side of the oil box by welding. A capillary tube is fixedly connected to the lower end of the connecting pipe. The capillary tube includes a capillary tube body. A spiral channel is opened on the inner side of the capillary tube body. An oil drip port is fixedly connected to the other end of the spiral channel. The shock absorption device includes a hollow column. A shock absorption spring is fixedly connected to the bottom of the inner side of the hollow column. A damping column is fixedly connected to the upper end of the shock absorption spring. A support column is fixedly connected to the upper end of the damping column. The upper end of the support column is fixedly connected to the gearbox.

[0009] As a further optimization of this utility model, the lubrication device is located at the top of the gear assembly, the oil box has a through hole at its upper end, the bottom of the rubber plug is installed at the through hole at the upper end of the oil box, and the rubber plug is perpendicular to the bottom of the oil box.

[0010] As a further optimization of this utility model, two connecting tubes are provided, each connecting tube is L-shaped, the interior of each connecting tube is connected to the oil box and the capillary tube, and the connecting tube passes through the upper end of the gearbox and connects to the upper end of the capillary tube.

[0011] As a further optimization of this utility model, two capillary tubes are provided, the connecting tube corresponds to the capillary tube, the capillary tube is shaped like a cone, the bottom of the capillary tube is located directly above the gear in the gear assembly, and the capillary tube is symmetrically arranged with respect to the vertical line of the oil box.

[0012] As a further optimization of this utility model, the capillary straw body has a frustum-shaped groove at its upper end. The bottom of the frustum-shaped groove at the upper end of the capillary straw body is connected to a spiral pipe. The spiral pipe spirals downward around the vertical axis of the capillary straw body, and the cross-sectional shape of the spiral pipe is circular.

[0013] As a further optimization of this utility model, the oil dripping port is located at the bottom of the capillary tube body, the inside of the oil dripping port is connected to the inside of the spiral pipe, the vertical cross-section of the oil dripping port is trapezoidal, and the oil dripping port and the midpoint of the capillary tube body are located on the same vertical line.

[0014] As a further optimization of this utility model, four shock-absorbing devices are provided, which are respectively located at the four corners of the bottom of the gearbox. Two shock-absorbing devices are symmetrically arranged with the center line of the bottom of the gearbox as the axis. The support column is slidably connected to the inside of the hollow column, and the damping column is in close contact with the inner wall of the hollow column.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] In this invention, when the toy car travels on uneven roads, the shock absorption device can absorb the vibration energy from the chassis through its own elastic deformation, playing a buffering role, reducing the vibration transmitted to the gearbox and other components, preventing excessive compression between gears and increasing wear. The lubrication device, connected to the oil box and capillary tube through a connecting pipe, allows the lubricating oil to flow to the gears at a more suitable flow rate, ensuring that the gears in the gear assembly are always in a good lubrication state. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the installation position of the gear assembly of this utility model;

[0019] Figure 3 This is a schematic diagram of the overall structure of the lubrication device of this utility model;

[0020] Figure 4 This is a schematic diagram of the cross-sectional structure of the capillary straw of this utility model;

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the hollow column of this utility model.

[0022] In the diagram: 1. Chassis; 2. Wheels; 3. Drive shaft assembly; 4. Gearbox; 5. Drive motor; 6. Gear assembly;

[0023] 7. Lubrication device; 71. Oil box; 72. Rubber stopper; 73. Connecting pipe; 74. Capillary tube; 741. Capillary tube body; 742. Spiral pipe; 743. Oil drip port;

[0024] 8. Vibration damping device; 81. Hollow column; 82. Vibration damping spring; 83. Damping column; 84. Support column. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0027] Please see Figure 1-5 This utility model provides a technical solution:

[0028] A rear-wheel drive mechanism for a toy car includes wheels 2, a drive shaft assembly 3, and a gearbox 4. The drive shaft assembly 3 is fixedly connected between two wheels 2. A chassis 1 is rotatably connected to the outer side of the drive shaft assembly 3. A shock-absorbing device 8 is fixedly connected to the upper end of the chassis 1. The gearbox 4 is fixedly connected to the upper end of the shock-absorbing device 8. The drive shaft assembly 3 passes through the gearbox 4 and is fixedly connected to a gear assembly 6. One end of the gear assembly 6 is fixedly connected to one end of the main shaft of a drive motor 5. The drive motor 5 is bolted to the inside of the gearbox 4. A lubrication device 7 is fixedly connected to the upper end of the gearbox 4. The lubrication device 7 includes an oil box 71, the inner side of which is connected to... The lower outer side of the rubber stopper 72 is tightly attached, and the outer side of the oil box 71 is fixedly connected to the connecting tube 73 by welding. The lower end of the connecting tube 73 is fixedly connected to the capillary tube 74. The capillary tube 74 includes a capillary tube body 741. A spiral pipe 742 is opened on the inner side of the capillary tube body 741. The other end of the spiral pipe 742 is fixedly connected to the oil drip port 743. The shock absorption device 8 includes a hollow column 81. A shock absorption spring 82 is fixedly connected to the bottom of the inner side of the hollow column 81. A damping column 83 is fixedly connected to the upper end of the shock absorption spring 82. A support column 84 is fixedly connected to the upper end of the damping column 83. The upper end of the support column 84 is fixedly connected to the gearbox 4.

[0029] As a further implementation of the above technical solution: the oil dripping port 743 is set at the bottom of the capillary tube body 741. The inside of the oil dripping port 743 is connected to the inside of the spiral pipe 742. The vertical cross-section of the oil dripping port 743 is trapezoidal. The midpoint of the oil dripping port 743 and the capillary tube body 741 are on the same vertical line. This can accurately drip the lubricating oil onto the gears of the gear assembly 6, ensuring that the lubricating oil accurately reaches the parts that need lubrication, and reducing friction and wear between gears.

[0030] As a further implementation of the above technical solution: four shock-absorbing devices 8 are provided, which are respectively located at the four corners of the bottom of the gearbox 4. The two shock-absorbing devices 8 are symmetrically arranged with the bottom center line of the gearbox 4 as the axis. The support column 84 is slidably connected to the inside of the hollow column 81, and the damping column 83 is in close contact with the inner wall of the hollow column 81. When the toy car is driving on an uneven road surface, it can absorb the vibration energy from the chassis 1 through its own elastic deformation, play a buffering role, and reduce the vibration transmitted to the gearbox 4 and other components.

[0031] As a further implementation of the above technical solution: two capillary tubes 74 are provided, with the connecting tube 73 corresponding to the capillary tube 74. The capillary tube 74 is cone-shaped, and the bottom of the capillary tube 74 is located directly above the gear in the gear assembly 6. The capillary tube 74 is symmetrically arranged with respect to the vertical line of the oil box 71, serving as a channel for conveying lubricating oil. Its structure can guide the lubricating oil to flow to the gear.

[0032] As a further implementation of the above technical solution: two connecting pipes 73 are provided. The connecting pipes 73 are L-shaped. The inside of the connecting pipes 73 are connected to the inside of the oil box 71 and the capillary suction tube 74. The connecting pipes 73 pass through the upper end of the gearbox 4 and connect to the upper end of the capillary suction tube 74, so that the lubricating oil can be smoothly transferred from the oil box 71 to the capillary suction tube 74. Its L-shaped design facilitates reasonable layout in the gearbox 4, while ensuring the internal connectivity of the pipes.

[0033] As a further implementation of the above technical solution: the capillary tube body 741 has a frustum-shaped groove at its upper end. The bottom of the frustum-shaped groove at the upper end of the capillary tube body 741 is connected to the spiral pipe 742. The spiral pipe 742 spirals downward around the vertical axis of the capillary tube body 741. The cross-sectional shape of the spiral pipe 742 is circular. The spiral pipe 742 can make the lubricating oil flow to the gear at a more suitable flow rate, ensuring that the gear in the gear assembly 6 is always in a good lubrication state.

[0034] As a further implementation of the above technical solution: the lubrication device 7 is set at the upper end near the gear assembly 6, the oil box 71 is provided with a through hole at the upper end, and the bottom of the rubber plug 72 is installed at the through hole at the upper end of the oil box 71. The rubber plug 72 is perpendicular to the bottom of the oil box 71 to prevent lubricating oil from leaking from the oil box 71 and to maintain the sealing of the lubricating oil in the oil box 71.

[0035] Workflow: First, lubricating oil is stored in oil box 71. The inner upper part of oil box 71 is tightly attached to the outer lower part of rubber stopper 72 to prevent lubricating oil leakage. The lubricating oil enters capillary tube 74 through connecting tube 73. Under capillary action, the lubricating oil flows downward along spiral channel 742. The spiral channel 742 prevents a large amount of lubricating oil from gushing out at once, allowing the lubricating oil to flow slowly and evenly within the channel. At the same time, it increases the flow path length of the lubricating oil within capillary tube 74. The inside of oil drip nozzle 743 is connected to the inside of spiral channel 742. Lubricating oil drips from oil drip nozzle 743 onto the gear in gear assembly 6, achieving lubrication of gear assembly 6. Through the action of fixed battery, drive motor 5 starts, and its main shaft begins to rotate. One end of the main shaft of drive motor 5 is fixedly connected to gear assembly 6. The rotation of motor main shaft... The gear assembly 6 is driven to rotate. Since the wheel 2 and the chassis 1 are rotatably connected through the drive shaft assembly 3, the chassis 1 remains relatively stationary when the wheel 2 rotates, realizing rear-wheel drive and propelling the entire device forward. When the device travels on uneven roads, the chassis 1 vibrates, and the vibration is transmitted to the gearbox 4. Four damping devices 8 are installed at the four corners of the bottom of the gearbox 4. The vibration of the gearbox 4 causes the support column 84 of the damping device 8 to be under pressure. After being under pressure, the support column 84 moves downward, compressing the damping spring 82. The damping column 83 is in close contact with the inner wall of the hollow column 81. When the damping column 83 moves inside the hollow column 81, it is subjected to friction, creating a damping effect layer. The compression of the damping spring 82 and the damping effect of the damping column 83 together slow down the moving speed of the support column 84, thereby reducing the vibration transmitted to the gearbox 4 and the entire device, and realizing the damping function.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rear-wheel drive mechanism for a toy car, comprising a wheel (2), a drive shaft assembly (3), and a gearbox (4), characterized in that: A drive shaft assembly (3) is fixedly connected between the two wheels (2). A chassis (1) is rotatably connected to the outside of the drive shaft assembly (3). A shock absorber (8) is fixedly connected to the upper end of the chassis (1). A gearbox (4) is fixedly connected to the upper end of the shock absorber (8). The drive shaft assembly (3) passes through the gearbox (4) and is fixedly connected to a gear assembly (6). One end of the gear assembly (6) is fixedly connected to one end of the main shaft of the drive motor (5). The drive motor (5) is installed inside the gearbox (4) by bolts. A lubrication device (7) is fixedly connected to the upper end of the gearbox (4). The lubrication device (7) includes an oil box (71), the inner side of the upper end of the oil box (71) is in close contact with the outer side of the lower end of the rubber stopper (72), a connecting pipe (73) is fixedly connected to the outer side of the oil box (71) by welding, a capillary tube (74) is fixedly connected to the lower end of the connecting pipe (73), the capillary tube (74) includes a capillary tube body (741), a spiral pipe (742) is opened on the inner side of the capillary tube body (741), and an oil drip port (743) is fixedly connected to the other end of the spiral pipe (742). The shock absorption device (8) includes a hollow column (81), a shock absorption spring (82) is fixedly connected to the bottom of the inner side of the hollow column (81), a damping column (83) is fixedly connected to the upper end of the shock absorption spring (82), a support column (84) is fixedly connected to the upper end of the damping column (83), and the upper end of the support column (84) is fixedly connected to the gearbox (4).

2. The rear wheel drive mechanism for a toy car according to claim 1, characterized in that: The lubrication device (7) is located at the top of the gear assembly (6). The oil box (71) has a through hole at its upper end. The bottom of the rubber plug (72) is installed at the through hole at the upper end of the oil box (71). The rubber plug (72) is perpendicular to the bottom of the oil box (71).

3. The rear wheel drive mechanism for a toy car according to claim 1, characterized in that: There are two connecting tubes (73). The connecting tubes (73) are L-shaped. The inside of the connecting tubes (73) is connected to the inside of the oil box (71) and the capillary tube (74). The connecting tubes (73) pass through the upper end of the gearbox (4) and are connected to the upper end of the capillary tube (74).

4. The rear wheel drive mechanism for a toy car according to claim 1, characterized in that: Two capillary tubes (74) are provided, and the connecting tube (73) and the capillary tube (74) are corresponding to each other. The capillary tube (74) is shaped like a cone. The bottom of the capillary tube (74) is located directly above the gear in the gear assembly (6). The capillary tube (74) is symmetrically arranged with respect to the vertical line of the oil box (71).

5. The rear wheel drive mechanism for a toy car according to claim 1, characterized in that: The capillary straw body (741) has a frustum-shaped groove at its upper end. The bottom of the frustum-shaped groove at the upper end of the capillary straw body (741) is connected to the spiral pipe (742). The spiral pipe (742) spirals downward around the vertical axis of the capillary straw body (741). The cross-sectional shape of the spiral pipe (742) is circular.

6. The rear wheel drive mechanism for a toy car according to claim 1, characterized in that: The oil drip nozzle (743) is located at the bottom of the capillary tube body (741). The inside of the oil drip nozzle (743) is connected to the inside of the spiral tube (742). The vertical cross-section of the oil drip nozzle (743) is trapezoidal. The midpoint of the oil drip nozzle (743) and the capillary tube body (741) are located on the same vertical line.

7. The rear wheel drive mechanism for a toy car according to claim 1, characterized in that: Four shock absorbers (8) are provided. The shock absorbers (8) are respectively located at the four corners of the bottom of the gearbox (4). Two shock absorbers (8) are symmetrically arranged with the bottom center line of the gearbox (4) as the axis. The support column (84) is slidably connected to the inside of the hollow column (81). The damping column (83) is in close contact with the inner wall of the hollow column (81).

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