Electronic throttle body

Abstract

The utility model provides an electronic throttle valve body which comprises a throttle valve shell and a throttle valve piece used for driving a throttle valve shaft to rotate, and a rotating shaft driving mechanism used for driving the throttle valve shaft to rotate is arranged in the shell. The rotating shaft driving mechanism comprises a direct-current motor, a motor gear, an intermediate gear, a sector gear assembly, a magnetic core assembly and a torsion spring, the direct-current motor is installed on one side of the throttle body, the motor gear is installed on an output shaft of the direct-current motor, the intermediate gear is rotatably installed on the throttle shell and meshed with the motor gear, and the sector gear assembly is connected with the magnetic core assembly. The sector gear is connected to the end of the throttle valve shaft through laser welding, the sector gear is meshed with the intermediate gear, the torsion spring is arranged on the sector gear in a sleeved mode, and the two ends of the torsion spring are fixed to sector gear limiting supporting legs. The electronic throttle valve body has the advantages of being simple in structure, low in cost, good in consistency of flow of a lower dead center of an assembly machine and flow of a default position, and capable of greatly improving reliability and stability of the electronic throttle valve body.

Description

Technical Field

[0001] This utility model relates to the field of throttle body technology, and in particular to an electronic throttle body. Background Technology

[0002] The electronic throttle body is an important control component of a car's gasoline engine. It can provide the engine with a continuously variable airflow. By adopting an electronic throttle control system, the throttle opening can be precisely controlled to achieve a reasonable air-fuel ratio, allowing the mixture to burn completely, reducing emissions, and improving the engine's power, economy, and comfort.

[0003] Currently, electronic throttle bodies commonly use idle speed adjustment screws or mechanical limit structures to limit the mechanical bottom dead center and default position, which requires high manufacturing precision and involves significant equipment investment. To achieve the required return torque for both forward and reverse rotation, most electronic throttle bodies use two independent torsion springs or double torsion springs in either direction, resulting in numerous parts, complex structures, and difficult assembly. Most current electronic throttle bodies use large, heavy DC motors with independent pressure plates, stators, and bases, requiring subsequent assembly for motor mounting, which also results in numerous parts, complex structures, difficult assembly, and high costs. Furthermore, most current electronic throttle bodies use ordinary screws for motor mounting, requiring tapping for the housing, which is inefficient. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a new type of electronic throttle body with high assemblability and reliability. This device is lightweight, compact, easy to install, reliable, and low in cost.

[0005] This utility model is achieved using the following technical solution: an electronic throttle body, characterized in that it includes a throttle housing, a throttle shaft, a throttle plate, and a position sensor. The throttle shaft is rotatably mounted inside the throttle housing via a needle roller bearing and a sliding bearing, with the needle roller bearing located on the side of the throttle shaft closer to the sector gear and the sliding bearing located on the side of the throttle shaft away from the sector gear. The throttle plate is fixedly mounted on the throttle shaft, and the position sensor is fixed to the throttle housing via a clamp. It also includes a DC motor, a motor gear, an intermediate gear, a sector gear, and a torsion spring. The DC motor is mounted on one side of the throttle housing, the motor gear is fixed to the DC motor output shaft, and the intermediate gear is rotatably mounted on the throttle housing and meshes with the motor gear. The sector gear is fixed to the end of the throttle shaft and meshes with the intermediate gear. The torsion spring is fitted onto the sector gear, and its two legs are respectively fixed to the limiting legs of the sector gear and the limiting legs of the throttle housing on both sides.

[0006] Furthermore, the DC motor is fixedly mounted on the throttle body using two self-tapping screws.

[0007] Furthermore, the throttle body housing integrates a structure for mounting and fixing the wiring harness, a cross-shaped reinforcing rib structure, and a weight-reducing hole structure.

[0008] Furthermore, the throttle body housing is provided with a sensor mounting and positioning groove for precise positioning of the position sensor.

[0009] Furthermore, the throttle body housing has three protrusions at the air inlet end for stable support when connected to the engine intake manifold.

[0010] Furthermore, the throttle valve is designed with a 7° deflection angle structure.

[0011] Furthermore, the default position structure of the sector gear is composed of a combination of straight face and rounded corners, which is used to limit the initial rotation angle range of the throttle shaft.

[0012] The electronic throttle body described in this utility model has the following beneficial effects:

[0013] 1. The throttle body of this utility model is provided with a positioning groove for installing a sensor, which cooperates with the sensor positioning post to facilitate sensor installation; the intake port end of the throttle body is provided with three limiting bosses to support and limit the intake manifold of the engine; the throttle body is provided with a cross-shaped reinforcing rib structure to enhance the vibration resistance and center of gravity balance of the throttle body; the throttle body is provided with a weight reduction hole structure, and the uniform wall thickness of the die casting is conducive to the forming of the die casting, while reducing the material weight and saving costs.

[0014] 2. The screws used to install and fix the motor on the housing of this utility model are two self-tapping screws. The screw mounting holes in the housing reduce the thread tapping process, improve the housing processing efficiency, and facilitate installation.

[0015] 3. The throttle plate of this utility model adopts a 7° plate, which can accurately provide the main channel airflow requirements of the engine under different opening degrees of the electronic throttle body.

[0016] 4. The default position structure of the sector gear of this utility model is designed with a straight surface and rounded corners, which effectively solves the problem of poor flow consistency at the default position caused by backlash. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a top view of the structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the motor of this utility model being installed using self-tapping screws;

[0022] Figure 5 This is a schematic diagram of the cross-shaped reinforcing rib structure of the shell;

[0023] Figure 6 Schematic diagram of the structure for mounting and fixing the wiring harness to the housing;

[0024] Figure 7 This is a schematic diagram of the shell weight reduction structure;

[0025] Figure 8 This is a schematic diagram of the throttle body structure;

[0026] Figure 9 This is a schematic diagram of the 7° structure of the throttle body plate;

[0027] Figure 10 This is a schematic diagram of the default position structure of the sector gear.

[0028] In the diagram, 1-Throttle body housing, 2-Throttle shaft, 3-Throttle plate, 4-Position sensor, 5-DC motor, 6-Needle roller bearing, 7-Sliding bearing, 8-Self-tapping screw, 9-Sector gear, 10-Torsion spring, 11-Metal insert, 12-Motor gear, 13-Intermediate gear, 14-Clamp, 15-Position sensor mounting slot, 16-Housing intake end boss one, 17-Housing intake end boss two, 18-Housing intake end boss three, 19-Fixed wiring harness structure, 20-Housing cross-shaped reinforcing rib structure, 21-Housing weight reduction structure, 22-Sector gear default position structure. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0031] like Figure 1-10 As shown, an electronic throttle body includes a throttle housing 1, a throttle shaft 2, a throttle plate 3, and a position sensor 4. The throttle shaft 2 is rotatably mounted inside the throttle housing 1. The throttle plate 3 is fixedly mounted on the throttle shaft 2 by self-locking screws. The throttle shaft 2 is fixed inside the throttle body 1 by needle roller bearings 6 and sliding bearings 7, with the needle roller bearings 6 located on the side of the throttle shaft 2 closer to the sector gear 9, and the sliding bearings 7 located on the side of the throttle shaft 2 away from the sector gear 9. The position sensor 4 is fixed to the throttle body 1 by clamps 14. The device also includes a DC motor 5 and a motor gear 12. The system includes an intermediate gear 13, a sector gear 9, and a torsion spring 10. A DC motor 5 is mounted on one side of the throttle body 1, and a motor gear 12 is mounted on the output shaft of the DC motor 5. The intermediate gear 13 is rotatably mounted on the throttle body 1 and meshes with the motor gear 12. The sector gear 9 is fixed to the end of the throttle shaft 2 by laser welding and meshes with the intermediate gear 13. The torsion spring 10 is fitted onto the sector gear 9, and the two legs of the torsion spring 10 are fixed on the limiting legs of the sector gear 9. At the same time, the two legs of the torsion spring 10 are stuck on both sides of the limiting legs of the body 1.

[0032] The motor 5 is mounted on the housing 1 using two self-tapping screws 8. The housing 1 is provided with a wiring harness mounting and fixing structure 19, a cross-shaped reinforcing rib structure 20, and a weight reduction structure 21.

[0033] The throttle body 1 is designed with a sensor mounting and positioning groove 15; the air intake end of the throttle body 1 is designed with three bosses, including a first air intake boss 16, a second air intake boss 17, and a third air intake boss 18, which effectively support the intake manifold connected to the engine; the throttle body 1 is designed with a structure 19 for installing and fixing the wiring harness; the throttle body 1 is designed with a cross-shaped reinforcing rib structure 20; and the throttle body 1 is designed with a weight reduction hole structure 21.

[0034] The throttle plate 3 is designed as a 7° throttle plate.

[0035] The default position structure 22 of the sector gear 9 is designed as a straight surface and rounded corner structure.

[0036] The above embodiments describe the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Modifications and variations made by those skilled in the art without departing from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. An electronic throttle body, characterized in that, The system includes a throttle body (1), a throttle shaft (2), a throttle plate (3), and a position sensor (4). The throttle shaft (2) is rotatably mounted inside the throttle body (1) via a needle roller bearing (6) and a sliding bearing (7). The needle roller bearing (6) is located on the side of the throttle shaft (2) closer to the sector gear (9), and the sliding bearing (7) is located on the side of the throttle shaft (2) away from the sector gear (9). The throttle plate (3) is fixedly mounted on the throttle shaft (2), and the position sensor (4) is fixed to the throttle body (1) via a clamp (14). The system also includes a DC motor (5) and a motor. The gear (12), intermediate gear (13), sector gear (9) and torsion spring (10) are provided. The DC motor (5) is installed on one side of the throttle housing (1). The motor gear (12) is fixed to the output shaft of the DC motor (5). The intermediate gear (13) is rotatably installed on the throttle housing (1) and meshes with the motor gear (12). The sector gear (9) is fixed to the end of the throttle shaft (2) and meshes with the intermediate gear (13). The torsion spring (10) is fitted on the sector gear (9). Its two legs are respectively fixed to the limiting legs of the sector gear (9) and the limiting legs of the throttle housing (1) on both sides.

2. The electronic throttle body according to claim 1, characterized in that, The DC motor (5) is fixedly mounted on the throttle body (1) by two self-tapping screws (8).

3. The electronic throttle body according to claim 1, characterized in that, The throttle body (1) integrates a structure (19) for installing and fixing the wiring harness, a cross-shaped reinforcing rib structure (20), and a weight reduction hole structure (21).

4. The electronic throttle body according to claim 1, characterized in that, The throttle body (1) is provided with a sensor mounting and positioning groove (15) for the precise positioning of the position sensor (4).

5. An electronic throttle body according to claim 1, characterized in that, The throttle body (1) has three protrusions at the air inlet end for stable support when connected to the engine intake manifold.

6. An electronic throttle body according to claim 1, characterized in that, The throttle plate (3) is designed with a 7° deflection angle structure.

7. An electronic throttle body according to claim 1, characterized in that, The default position structure (22) of the sector gear (9) is composed of a combination of straight face and rounded corner structure, which is used to limit the initial rotation angle range of the throttle shaft (2).

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