CN201354832Y - Feed-through acceleration and deceleration mechanism - Google Patents

Abstract

The utility model discloses a straight-through acceleration and deceleration mechanism mainly comprises a power shaft that has the external gear, a plurality of drive gear that have double gear and an annular fluted disc that has the internal gear. The transmission gear is arranged around the power shaft in a surrounding mode and is connected with the outer gear through a first layer gear of the transmission gear; furthermore, the power shaft further penetrates through the annular fluted disc to enable the second layer of the transmission gear to be connected with the internal gear; by means of the configuration, the power of the power shaft can be transmitted to the annular fluted disc for output in an accelerating and decelerating manner. The transmission gear is arranged between the power shaft and the annular fluted disc in a surrounding way, so that the eccentric force of gear transmission can be counteracted, the power transmission is more direct and quieter, and the power with larger torque can be borne; and the power shaft penetrates through the annular fluted disc, so that the power input and the power output are coaxial, the space required by the arrangement of an acceleration and deceleration mechanism can be reduced, and the power shaft and the output shaft can be used as an accelerator when being opposite.

Description

Through the heart type acceleration and deceleration mechanism

technical field

The utility model relates to an acceleration and deceleration mechanism, which mainly relates to a structure of a power acceleration and deceleration device connected with a mechanical power device, in particular to a device with a plurality of transmission gears arranged between coaxial power input ends and output ends. innovative structure.

Background technique

Now that the earth's petrochemical energy is about to face a crisis of depletion, the internal combustion engine fueled by petroleum is bound to be eliminated in the foreseeable future and replaced by an electric motor driven by electric energy. At present, vehicles powered by electric motors have begun to develop, and all electric bicycles, electric locomotives, electric cars, etc. will enter the stage of mass production.

Using an electric motor as the power source of a vehicle can achieve almost zero pollution and can easily generate a higher speed than an internal combustion engine, but its torque is far less than that of an internal combustion engine. Therefore, most electromechanical devices will be equipped with a deceleration mechanism, using several gears with different gear ratios in the deceleration device to transmit power, which can reduce the speed to increase the torque output value.

However, the existing deceleration mechanism is a non-coaxial configuration, and its input axis and output axis are not in a straight line, requiring a large space when arranging the power source, deceleration mechanism, and power output terminal (such as tires). The original appeal of light vehicles such as electric bicycles is to be lightweight and simple. If the existing deceleration mechanism with a large volume is equipped, it will appear cumbersome. Moreover, because the existing deceleration mechanism is bulky, it is only suitable to be arranged at the rear wheel position of the electric bicycle, which causes the center of gravity of the electric bicycle to be behind, which is unfavorable for driving stability.

In view of the many deficiencies and disadvantages in the structure of the existing deceleration mechanism, the designer of the utility model strives to find a solution based on decades of accumulated rich experience in the above-mentioned industry, as well as the experience of applying for and obtaining multiple domestic and foreign patents. , finally have the completion of the utility model piercing type acceleration and deceleration mechanism. The designer of the utility model hopes that with the proposal of this case, he can do his best and contribute his talents to the industry.

Contents of the invention

The main purpose of this utility model is to provide an innovative acceleration and deceleration mechanism in which the shaft center of the power input end and the axis center of the output end are coaxially arranged, and the volume of the acceleration and deceleration mechanism is smaller than that of the existing acceleration and deceleration mechanism. The mechanism is able to withstand greater torque.

For realizing above-mentioned object, the technical scheme that the utility model adopts is:

A through-the-center acceleration and deceleration mechanism is characterized in that it includes:

The power shaft is a shaft body, and external gears are arranged around its outer side;

The transmission gear is a double-layer gear, the diameter of the first layer gear is different from that of the second layer gear;

The ring-shaped toothed plate is a pan-shaped plate body with an internal gear on the inner wall, an opening in the center of the plate, and an output end extending from the opening to the back;

Among them, a transmission gear is arranged around the power shaft, and the first layer of gears is meshed with the outer gear; then the annular toothed plate is fitted with the power shaft, so that the power shaft passes through the opening, and the inner gear meshes with the second layer of gears; When the power shaft rotates, the external gear drives the transmission gear, and the transmission gear drives the annular toothed plate, so that the output end can rotate.

When the power shaft rotates, the external gear drives the first layer of gears to rotate the transmission gear, and then the second layer of transmission gear drives the internal gear to rotate the annular toothed disc, and then the decelerated power is obtained from the output end, and the opposite output shaft input The drive shaft then becomes the accelerator.

Compared with the prior art, the utility model adopting the above-mentioned technical solution has the advantage that: since the transmission gear is arranged around the power shaft and the annular toothed disc, the eccentric force of the gear transmission can be offset, so that the power transmission is more direct and quieter At the same time, it can withstand the power of greater torque; secondly, the power shaft passes through the ring gear, so that the power input and output are coaxial, which can reduce the space required for the acceleration and deceleration mechanism. In addition, when the input shaft and the output shaft are opposite, it can be Accelerator usage.

Description of drawings

Fig. 1 is the three-dimensional exploded view of structure of the present utility model;

Fig. 2 is a three-dimensional exploded view of the utility model structure;

Fig. 3 is a three-dimensional schematic diagram of the combination of the power shaft and the transmission gear into the body of the utility model;

Fig. 4 is a three-dimensional schematic diagram of the positioning plate combined into the body in the utility model;

Fig. 5 is a perspective view of the utility model;

Fig. 6 is a schematic perspective view of the action of the power shaft, the transmission gear and the annular toothed disc of the present invention;

Fig. 7 is a schematic plan view of the action of the power shaft, the transmission gear and the annular chainring of the present invention.

Explanation of reference signs: 1-body; 11-shaft hole; 2-power shaft; 21-external gear; 22-hollow part; 3-transmission gear; 31-first gear; 32-second gear; Positioning plate; 41-central hole; 42-positioning hole; 5-ring gear; 51-internal gear; 52-opening; 53-output end; 6-cover plate; 61-axis hole.

Detailed ways

Hereby, with regard to the structural composition of the utility model through-type acceleration and deceleration mechanism, and the effects produced therein, in conjunction with the drawings, a preferred embodiment of the case is described in detail as follows:

First please refer to Fig. 1 and Fig. 2, the through-center type acceleration and deceleration mechanism in this case includes a main body 1, a power shaft 2, a transmission gear 3, a positioning plate 4, an annular gear plate 5 and a cover plate 6. The body 1 is a bowl-shaped shell for accommodating various components, and a shaft hole 11 is opened in the center thereof. The power shaft 2 is a cylinder with an external gear 21 on the outside, and a transparent hollow 22 at the center of the cylinder. The transmission gear 3 is a double-layer gear, which is divided into a first layer gear 31 and a second layer gear 32 , and the diameter of the first layer gear 31 is larger than that of the second layer gear 32 . The positioning plate 4 is a plate with a central hole 41 and a plurality of positioning holes 42 thereon. The ring gear 5 is a dish-shaped disk, the inner concave side wall of which has an internal gear 51, an opening 52 at the center of the disk, and an output end 53 of a hollow tube extending from the opening 52 towards the bottom of the disk. The cover plate 6 is also a plate body, and a shaft hole 61 is opened in the center.

Next, please refer to FIG. 3 , FIG. 4 and FIG. 5 , which are schematic diagrams of the combination of the above-mentioned components. First, take a body 1 , insert the power shaft 2 into the shaft hole 11 , and the external gear 21 is located inside the body 1 . Then take three sets of transmission gears 3, put the first layer of gears 31 inwards and the second layer of gears outwards into the inside of the main body 1, and surround the periphery of the power shaft 2 equidistantly, and the first layer of gears 31 are all connected to the outer Gear 21 meshes. Get a locating plate 4 to wear again on the power shaft 2 and the transmission gear 3 , its central hole 41 is matched with the power shaft 2 , and the positioning hole 42 is matched with the transmission gear 3 . Then, assemble the ring gear 5 into the body 1 , make the power shaft 2 pass through the opening 52 , and the internal gear 51 meshes with the second gear 32 . Finally, cover the body 1 with the cover plate 6 , and let the power shaft 2 and the output end 53 pass through the shaft hole 61 .

Finally, please refer to FIG. 6 and FIG. 7 , which are schematic diagrams showing the actions of the power shaft 2 , the transmission gear 3 and the ring gear 5 . When the power shaft 2 rotates, the external gear 21 first drives the first gear 31 to make the transmission gear 3 rotate, and then the second gear drives the internal gear 51 to rotate the ring gear 5, and the output end 53 has power for use. Since the first gear 31 and the second gear 32 have different diameters and different gear ratios, the large-diameter internal gear 51 is driven to transmit the power from the power shaft 2 to the output end 53 to reduce the rotational speed and increase the torque.

Since the power shaft 2 and the power output end 53 are arranged coaxially, the space required for its arrangement in the mechanical device is greatly reduced. Furthermore, the end of the power shaft 2 can be extended to the outside of the output end 53 to combine with other mechanisms to effectively utilize the power of the power shaft 2 . For example, a deceleration mechanism is connected to the end of the power shaft 2, and two different rotational speeds and torque outputs can be obtained with the same rotational speed input. In addition, in this case, the power shaft 2 has a hollow portion 22, allowing another shaft body to pass through and rotate freely, increasing the application range of the reduction mechanism. For example, if it is applied to an electric bicycle, the power unit and the through-type acceleration and deceleration mechanism can be installed on the pedal crank, and the central rotating shaft of the pedal crank can still rotate freely after passing through the hollow part 22 . In this way, the power unit and the smaller through-type acceleration and deceleration mechanism can be easily installed in the middle of the electric bicycle, and its center of gravity can increase driving stability and handling. Furthermore, in this case, there are three or more sets of transmission gears 3, which can balance the eccentric force generated by the connection of each gear, and thus withstand strong torsion. At the same time, it has the effect of suppressing the noise of gear meshing, and makes the power transmission more complete and more stable. .

Above-mentioned content of this case through-the-center type acceleration and deceleration mechanism is one embodiment thereof, and it can be changed according to its spirit. For example, the number of configurations of transmission gears 3 can be two, four or more to increase the torsion bearing value; or each gear can also be in the form of helical gears to improve quietness in addition to spur gears.

The above description is only illustrative, rather than restrictive, of the present utility model. Those of ordinary skill in the art understand that many modifications, changes or equivalents can be made without departing from the spirit and scope defined in the claims. But all will fall within the protection scope of the present utility model.

Claims (4)

1, a kind of feedthrough acceleration and deceleration mechanism is characterized in that, includes:

Line shaft is an axis body, and its outer periphery is provided with external gear;

Driving gear is a kind of double-layer gear, and its first layer gear is different with second layer gear diameter;

Annular fluted disc is a ware type disk body, and its madial wall has internal gear, and the disk center place is provided with opening, and is extended with the end of exerting oneself from opening to the back side;

Wherein, around line shaft, dispose driving gear, and make first layer gear and external gear engagement; Get annular fluted disc and line shaft fit again, line shaft is passed by opening, and internal gear and second layer gear engagement; When line shaft rotated, external gear drove driving gear, and driving gear drives annular fluted disc again, and the end of exerting oneself is rotated.

2, according to the described feedthrough acceleration and deceleration of claim 1 mechanism, it is characterized in that: described line shaft is a hollow tube.

3, according to the described feedthrough acceleration and deceleration of claim 1 mechanism, it is characterized in that: the first layer gear diameter of described driving gear is greater than second layer gear.

4, according to the described feedthrough acceleration and deceleration of claim 1 mechanism, it is characterized in that: around line shaft, dispose two or more described driving gears.

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