Transmission shaft for remote control car

Abstract

The utility model discloses a transmission shaft for a remote control car, and particularly relates to the technical field of remote control car accessories, the transmission shaft comprises a telescopic spline shaft, two universal joints and two connecting pieces, the two universal joints are respectively arranged at two ends of the telescopic spline shaft, and the connecting pieces are respectively arranged at one ends of the corresponding universal joints. Wherein the universal joint comprises a first universal joint fork, a second universal joint fork and a cross shaft pin, the first universal joint fork is fixedly installed at one end of the telescopic spline shaft, the second universal joint fork is installed at one end of the connecting piece, the first universal joint fork is fixedly installed at one end of the telescopic spline shaft, and the second universal joint fork is installed at one end of the connecting piece. According to the universal joint, a structure for injecting lubricating oil into the universal joint is additionally arranged on the structure of the universal joint, the using smoothness of the universal joint can be improved, abrasion of the first universal joint fork, the second universal joint fork and the cross shaft pin is reduced, and the service life of the whole transmission shaft is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of remote control car accessories, and more specifically, the utility model relates to a transmission shaft used for a remote control car. Background Art

[0002] A remote control car is a model car that can be controlled remotely by a radio remote controller. It can generally be divided into several categories: toys, car models, and police cars. The movement of a remote control car is inseparable from the power transmission between two shafts with different axes or even between two shafts whose relative positions are constantly changing during operation. Currently, the drive shaft usually uses telescopic spline shafts and universal joints to cooperate with the movement of the remote control car.

[0003] The utility model patent with patent application number CN202122875677.8 discloses a drive shaft for a remote control car, including a front half-shaft and a rear half-shaft, including a bellows connected between the front half-shaft and the rear half-shaft, and also including two cylindrical pins; in this structure, the bellows is used and the bellows is movably connected to the ball socket of the drive shaft to replace the original spline shaft and universal joint to complete the power transmission between the two shafts whose relative positions are constantly changing. The processing technology is simple, reducing manufacturing costs, and can avoid the noise caused by the collision of the active tube patterns of the bellows, thereby improving the user experience.

[0004] However, in actual use, the structure requires that the ball joints at the front half shaft and the rear half shaft move in the ball socket cavity at one end of the bellows to enable the transmission shaft to achieve bending movement. However, when the ball joint rotates and rubs inside the ball socket cavity for a long time, the wear of the ball joint is easily accelerated, and it is not convenient to lubricate the ball joint and the ball socket cavity, which affects the ultimate service life of the transmission shaft. In view of this, the utility model proposes a transmission shaft for a remote control car. Utility Model Content

[0005] In order to overcome the above defects of the prior art, the utility model provides a transmission shaft for a remote control car to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a transmission shaft for a remote control car, comprising a telescopic spline shaft, two universal joints and two connecting pieces, the two universal joints are respectively mounted at the two ends of the telescopic spline shaft, the connecting pieces are respectively mounted at one end of the corresponding universal joints, the universal joints comprise a first universal yoke fork, a second universal yoke fork and a cross-axis pin, the first universal yoke fork is fixedly mounted at one end of the telescopic spline shaft, the second universal yoke fork is mounted at one end of the connecting piece, the cross-axis pin is mounted at the connection between the first universal yoke fork and the second universal yoke fork, the four end points of the cross-axis pin are respectively embedded in the inner walls of the corresponding first universal yoke fork and the second universal yoke fork, and the first universal yoke fork and the second universal yoke fork are movably connected via the cross-axis pin.

[0007] It can be seen that in the above structure, the two connecting parts can be used to connect with the frame of the remote control car. The function of the universal joint can make the remote control car swing in different directions, so as to achieve the flexibility of the use of the remote control car.

[0008] In order to facilitate lubrication of the first universal joint fork and the second universal joint fork and the cross shaft pin connection of the universal joint, preferably, the surfaces of the first universal joint fork and the second universal joint fork are provided with an oil injection structure for lubricating the cross shaft pin, and the oil injection structure includes an oil injection pipe, and the surfaces of the first universal joint fork and the second universal joint fork are provided with two oil injection holes, and the oil injection pipes are respectively fixedly installed in the corresponding oil injection holes and are connected with the oil injection holes, and a sealing cover is provided on the outside of the oil injection pipe, and the outer surface of the oil injection pipe is provided with an external thread, and the inner wall of the sealing cover is provided with an internal thread, and the sealing cover is threadedly connected to the oil injection pipe through the external thread and the internal thread, and a filter screen is installed inside the oil injection pipe, and a sealing ring is provided at the connection between the oil injection pipe and the sealing cover.

[0009] Technical effects and advantages of the utility model:

[0010] 1. By setting up an oil injection structure, the sealing cap on the outside of the corresponding oil injection pipe is opened at the universal joint, so that the oil injection pipe is opened, and the lubricating oil is poured into the inside of the oil injection hole through the oil injection pipe, so that the lubricating oil enters the connection between the cross shaft pin, the first universal joint fork and the second universal joint fork and performs lubrication treatment, thereby ensuring the smoothness of the use of the universal joint, reducing friction, thereby increasing the overall service life of the transmission shaft, and facilitating the user to perform maintenance operations;

[0011] 2. During the process of adding lubricating oil, the filter screen inside the oil filling pipe can filter impurities in the lubricating oil, preventing impurities from entering the cross shaft pin and accelerating the wear of the cross shaft pin. In addition, the sealing ring at the connection between the oil filling pipe and the sealing cover can improve the sealing performance of the connection between the sealing cover and the oil filling pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] Figure 2 For the utility model Figure 1 Schematic diagram of the partially enlarged structure.

[0014] Figure 3 For the utility model Figure 2 Enlarged structural diagram at A in the middle.

[0015] Figure 4 It is a schematic diagram of the connection structure of the first universal joint fork and the second universal joint fork of the utility model.

[0016] The accompanying drawings are marked as follows: 1. telescopic spline shaft; 2. universal joint; 3. connecting piece; 20. first universal joint fork; 21. second universal joint fork; 22. cross shaft pin; 4. oil filling pipe; 5. sealing cover; 6. filter screen. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] As attached Figure 1-4 A transmission shaft for a remote control car shown in the figure comprises a telescopic spline shaft 1, two universal joints 2 and two connecting members 3, the two universal joints 2 are respectively mounted at the two ends of the telescopic spline shaft 1, the connecting members 3 are respectively mounted at one end of the corresponding universal joints 2, the universal joint 2 comprises a first universal yoke 20, a second universal yoke 21 and a cross shaft pin 22, the first universal yoke 20 is fixedly mounted at one end of the telescopic spline shaft 1, the second universal yoke 21 is mounted at one end of the connecting member 3, the cross shaft pin 22 is mounted at the connection between the first universal yoke 20 and the second universal yoke 21, the four end points of the cross shaft pin 22 are respectively embedded in the inner walls of the corresponding first universal yoke 20 and the second universal yoke 21, and the first universal yoke 20 and the second universal yoke 21 are movably connected through the cross shaft pin 22.

[0019] Specifically, the transmission shaft in the structure is composed of a telescopic spline shaft 1, two universal joints 2 and two connecting parts 3, wherein the universal joint 2 is composed of a first universal joint fork 20, a second universal joint fork 21 and a cross shaft pin 22. In actual use, the two connecting parts 3 can be used to connect with the frame of the remote control car, and the setting of the universal joint 2 can enable the remote control car to swing in different directions, thereby improving the experience of the remote control car. The use principle of the universal joint 2 mainly adopts the rotation between the first universal joint 2 and the second universal joint 2 through the cross shaft pin 22 to achieve the swing of the remote control car in different directions.

[0020] In this embodiment, as shown in the attached Figure 2 , 3As shown, the surfaces of the first universal joint fork 20 and the second universal joint fork 21 are both provided with an oil injection structure for lubricating the cross shaft pin 22, and the oil injection structure includes an oil injection pipe 4. The surfaces of the first universal joint fork 20 and the second universal joint fork 21 are both provided with two oil injection holes. The oil injection pipes 4 are respectively fixedly installed inside the corresponding oil injection holes and are connected with the oil injection holes. A sealing cover 5 is provided on the outside of the oil injection pipe 4. The outer surface of the oil injection pipe 4 is provided with an external thread, and the inner wall of the sealing cover 5 is provided with an internal thread. The sealing cover 5 is threadedly connected to the oil injection pipe 4 through the external thread and the internal thread. A filter screen 6 is installed inside the oil injection pipe 4, and a sealing ring is provided at the connection between the oil injection pipe 4 and the sealing cover 5.

[0021] Specifically, in this structure, when the first yoke 20 and the second yoke 21 at the universal joint 2 rotate through the cross shaft pin 22, a large amount of friction is easily caused, or when the lubrication effect becomes poor, the staff can open the sealing cover 5 on the outside of the corresponding oil filling pipe 4 to open the oil filling pipe 4, and pour the lubricating oil into the inside of the oil filling hole through the oil filling pipe 4, so that the lubricating oil enters the connection between the cross shaft pin 22, the first yoke 20 and the second yoke 21 and performs lubrication treatment, thereby ensuring the smooth use of the universal joint 2;

[0022] During the process of adding the lubricating oil, the filter screen 6 inside the oil filling pipe 4 can filter the impurities in the lubricating oil, thereby preventing the impurities from entering the cross shaft pin 22 and accelerating the wear of the cross shaft pin 22 .

[0023] Working principle of this utility model:

[0024] When the above structure is used, firstly, the two connecting members 3 in the structure can be used to connect with the frame of the remote control car, and the function of the universal joint 2 can make the remote control car swing in different directions, so as to achieve the flexibility of the use of the remote control car;

[0025] When lubrication is required for the connection between the first universal joint fork 20 and the second universal joint fork 21 and the cross shaft pin 22 of the universal joint 2, the user needs to open the sealing cap 5 on the outside of the corresponding oil filling pipe 4, so that the oil filling pipe 4 is opened, and the lubricating oil is poured into the inside of the oil filling hole through the oil filling pipe 4, so that the lubricating oil enters the connection between the cross shaft pin 22, the first universal joint fork 20 and the second universal joint fork 21 and performs lubrication treatment, thereby ensuring the smooth use of the universal joint 2;

[0026] However, during the process of adding lubricating oil, the filter screen 6 inside the oil filling pipe 4 can filter the impurities in the lubricating oil, thereby preventing the impurities from entering the cross shaft pin 22 and accelerating the wear of the cross shaft pin 22 .

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A transmission shaft for a remote control vehicle, comprising a telescopic spline shaft (1), two universal joints (2) and two connecting members (3), wherein the two universal joints (2) are respectively mounted at both ends of the telescopic spline shaft (1), and the connecting members (3) are respectively mounted at one end of the corresponding universal joints (2), characterized in that: The universal joint (2) comprises a first universal joint fork (20), a second universal joint fork (21) and a cross pin (22); The first universal joint fork (20) is fixedly mounted on one end of the telescopic spline shaft (1), the second universal joint fork (21) is mounted on one end of the connecting member (3), the cross shaft pin (22) is mounted at the connection between the first universal joint fork (20) and the second universal joint fork (21), and the surfaces of the first universal joint fork (20) and the second universal joint fork (21) are both provided with an oil injection structure for lubricating the cross shaft pin (22).

2. A transmission shaft for a remote-controlled vehicle according to claim 1, characterized in that: The oil injection structure comprises an oil injection pipe (4), and two oil injection holes are respectively provided on the surface of the first universal joint fork (20) and the second universal joint fork (21), and the oil injection pipe (4) is respectively fixedly installed inside the corresponding oil injection holes and is connected to the oil injection holes.

3. A transmission shaft for a remote-controlled vehicle according to claim 2, characterized in that: A sealing cover (5) is arranged outside the oil filling pipe (4), an outer surface of the oil filling pipe (4) is provided with an external thread, an inner wall of the sealing cover (5) is provided with an internal thread, and the sealing cover (5) is threadedly connected to the oil filling pipe (4) via the external thread and the internal thread.

4. The transmission shaft for a remote-controlled vehicle according to claim 2, characterized in that: A filter screen (6) is installed inside the oil filling pipe (4), and a sealing ring is provided at the connection between the oil filling pipe (4) and the sealing cover (5).

5. The transmission shaft for a remote-controlled vehicle according to claim 1, characterized in that: The four end points of the cross pin (22) are respectively embedded in the inner walls of the corresponding first universal joint fork (20) and the second universal joint fork (21), and the first universal joint fork (20) and the second universal joint fork (21) are movably connected via the cross pin (22).

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