Rack bar position actuator for oil sprayer and oil sprayer

Abstract

The utility model discloses a rack bar position actuator used for an oil injector and the oil injector, the rack bar position actuator used for the oil injector is used for adjusting the displacement amount of a rack bar of the oil injector, the rack bar position actuator comprises a shell, a displacement bar, a rotating shaft, a transmission mechanism and a driving source, the displacement bar is arranged in the shell in a sliding mode, and the rotating shaft is arranged in the shell. One end of the displacement rod is connected with the toothed rod, and a toothed groove is formed in the displacement rod; the rotating shaft is rotationally mounted in the shell, and a gear ring corresponding to the tooth groove of the displacement rod is arranged on the rotating shaft; the driving source is suitable for driving the rotating shaft to rotate through the transmission mechanism, and then the gear ring of the rotating shaft is meshed with the tooth groove of the displacement rod, so that the displacement rod does linear motion, and the displacement amount of the gear rod of the oil sprayer is adjusted. The displacement of the rack bar of the fuel injector can be adjusted.

Description

Technical Field

[0001] The utility model relates to a gear rod position actuator for a fuel injector and the fuel injector, belonging to the technical field of fuel injectors. Background Art

[0002] At present, with the rapid development of the automobile industry, the requirements for automobile fuel systems are also increasing. As an important part of the automobile fuel system, the performance of the injector directly affects the engine's working efficiency, emission level and fuel economy.

[0003] After searching the prior art, it was found that a Chinese patent with the publication number CN204610045U disclosed a diesel engine speed governor. In this patent, the fuel injection pump is directly controlled by a stepper motor drive mechanism, but during use, it was found that due to the large vibration in the working environment, the stepper motor drive mechanism directly controlling the fuel injection pump is prone to a decrease in control accuracy. Summary of the invention

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a gear rod position actuator for a fuel injector, which can adjust the displacement of the gear rod of the fuel injector.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a rack position actuator for a fuel injector, used to adjust the displacement of the rack of the fuel injector, comprising:

[0006] shell;

[0007] A displacement rod, the displacement rod is slidably disposed in the housing, one end of the displacement rod is connected to the gear rod, and a tooth groove is provided on the displacement rod;

[0008] A rotating shaft, the rotating shaft is rotatably mounted in the housing, and the rotating shaft is provided with a gear ring corresponding to the tooth groove of the displacement rod;

[0009] Transmission mechanism;

[0010] A driving source, wherein the driving source is suitable for driving the rotating shaft to rotate through the transmission mechanism, and then the gear ring of the rotating shaft is engaged with the tooth groove of the displacement rod, so that the displacement rod moves linearly, thereby adjusting the displacement amount of the gear rod of the injector.

[0011] Furthermore, the rack rod position actuator for the fuel injector further includes a rotation angle detection structure, and the rotation angle detection structure includes:

[0012] An angle sensor, wherein the angle sensor is fixed in the housing;

[0013] Transmission components;

[0014] The angle sensor is suitable for collecting angle information of the rotating shaft through the transmission assembly.

[0015] Furthermore, the angle sensor is a rotary potentiometer.

[0016] Furthermore, the transmission assembly comprises:

[0017] A driving gear, the driving gear being fixed on the other end of the rotating shaft;

[0018] a driven gear fixed to an input of the angle sensor;

[0019] The angle sensor is suitable for collecting the rotational motion of the rotating shaft through the meshing transmission of the driving gear and the driven gear.

[0020] Furthermore, the transmission mechanism comprises:

[0021] A worm gear, the worm gear is coaxially connected to one end of the rotating shaft;

[0022] A worm, the worm being mounted on the output end of the driving source and meshingly connected with the worm wheel;

[0023] The driving source is suitable for driving the worm wheel to rotate through the worm, thereby driving the rotating shaft to rotate.

[0024] Furthermore, the driving source is a motor.

[0025] Furthermore, at least one limiting protrusion is provided on the displacement rod, and the limiting protrusion is suitable for limiting the travel range of the displacement rod in the housing.

[0026] The utility model also provides a fuel injector, comprising the above rack rod position actuator for the fuel injector.

[0027] By adopting the above technical solution, the utility model has the following beneficial effects:

[0028] In the utility model, the driving source first drives the rotating shaft to rotate through the transmission mechanism. Then, due to the meshing of the gear ring on the rotating shaft and the tooth groove on the displacement rod, the rotation of the rotating shaft drives the displacement rod to move linearly, thereby driving the gear rod of the fuel injector to move, thereby achieving precise control of the displacement of the gear rod of the fuel injector.

[0029] In addition, the rotation angle detection structure composed of an angle sensor and a transmission component monitors the angle change of the rotating shaft in real time, ensuring that the linear motion of the displacement rod is more precise, thereby further improving the accuracy of the injection quantity adjustment.

[0030] In summary, the utility model not only realizes the precise adjustment of the displacement of the injector gear rod, but also has the advantages of convenient operation, low power consumption and stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a cross-sectional structural schematic diagram of a rack rod position actuator for a fuel injector of the utility model;

[0032] Figure 2 It is a schematic diagram of the three-dimensional structure of the rack rod position actuator for the fuel injector of the utility model. DETAILED DESCRIPTION

[0033] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0034] like Figure 1-2 As shown, a rack position actuator for a fuel injector is used to adjust the displacement of a rack 1 of the fuel injector, comprising:

[0035] Shell 2;

[0036] A displacement rod 3, the displacement rod 3 is slidably arranged in the housing 2, one end of the displacement rod 3 is connected to the gear rod 1, and a tooth groove is arranged on the displacement rod 3;

[0037] A rotating shaft 4 is rotatably mounted in the housing 2, and a gear ring corresponding to the tooth groove of the displacement rod 3 is provided on the rotating shaft 4;

[0038] Transmission mechanism;

[0039] The driving source 5 is suitable for driving the rotating shaft 4 to rotate through a transmission mechanism, and then the gear ring of the rotating shaft 4 is engaged with the tooth groove of the displacement rod 3, so that the displacement rod 3 moves linearly, thereby adjusting the displacement of the gear rod 1 of the injector.

[0040] In this embodiment, if Figure 1-2 As shown, the driving source 5 first drives the rotating shaft 4 to rotate through the transmission mechanism. Subsequently, since the gear ring on the rotating shaft 4 is meshed with the tooth groove on the displacement rod 3, the rotation of the rotating shaft 4 drives the displacement rod 3 to move linearly, thereby driving the gear rod 1 of the fuel injector to move. The displacement amount of the gear rod 1 of the fuel injector is precisely controlled.

[0041] Specifically, Figure 1-2 As shown, the rack rod position actuator for the injector also includes a rotation angle detection structure, and the rotation angle detection structure includes:

[0042] An angle sensor 6, the angle sensor 6 is fixed in the housing 2;

[0043] Transmission components;

[0044] The angle sensor 6 is suitable for collecting angle information of the rotating shaft 4 through the transmission component.

[0045] Specifically, Figure 1 As shown, the angle sensor 6 is a rotary potentiometer.

[0046] Specifically, Figure 1 As shown, the transmission assembly may be of the following structure, including:

[0047] A driving gear, which is fixed to the other end of the rotating shaft 4;

[0048] A driven gear, which is fixed to the input of the angle sensor 6;

[0049] The angle sensor 6 is suitable for collecting the rotational motion of the rotating shaft 4 through the meshing transmission of the driving gear and the driven gear.

[0050] In this embodiment, if Figure 1-2 As shown, the function of the rotation angle detection structure is to monitor the rotation position of the rotating shaft 4 in real time, so as to accurately obtain the linear displacement of the displacement rod 3, so that the displacement of the injector gear rod 1 can be accurately adjusted.

[0051] In the specific implementation process, when the driving source 5 starts to work, the rotating shaft 4 starts to rotate through the transmission mechanism. At the same time, the driving gear also rotates synchronously with the rotating shaft 4, thereby driving the rotary potentiometer to rotate through the engagement with the driven gear. The rotary potentiometer detects the angle of its own rotation and feeds back the current angle of the rotating shaft 4 to the controller. The controller determines the current linear displacement of the displacement rod 3 based on the feedback angle value, and adjusts the operating state of the driving source 5, thereby accurately controlling the displacement of the injector gear rod 1.

[0052] Specifically, Figure 1 As shown, the transmission mechanism may be of the following structure, including:

[0053] A worm gear, which is coaxially connected to one end of the rotating shaft 4;

[0054] A worm, which is mounted on the output end of the driving source 5 and is meshed with the worm wheel;

[0055] The driving source 5 is suitable for driving the worm wheel to rotate through the worm, thereby driving the rotating shaft 4 to rotate.

[0056] In this embodiment, if Figure 1 As shown, when the driving source 5 is running, the worm at the output end drives the worm wheel meshing with it to rotate, thereby driving the rotating shaft 4 coaxially connected to the worm wheel to rotate.

[0057] Specifically, Figure 1 As shown, the driving source 5 is a motor.

[0058] Specifically, Figure 1-2 As shown, two limit protrusions are provided on the displacement rod 3 , and the limit protrusions are suitable for limiting the travel range of the displacement rod 3 in the housing 2 .

[0059] In this embodiment, if Figure 1-2 As shown, limiting protrusions are provided on the outer surface of the displacement rod 3 . When the displacement rod 3 performs linear reciprocating motion in the housing 2 , these limiting protrusions will form mechanical interference with the inner wall of the housing 2 , thereby limiting the travel range of the displacement rod 3 .

[0060] In some embodiments, the number of limiting protrusions is not limited to two and can be set according to specific needs.

[0061] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are 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 rack position actuator for a fuel injector, used for adjusting the displacement of a rack (1) of the fuel injector, characterized in that: include: Housing (2); A displacement rod (3), wherein the displacement rod (3) is slidably disposed in the housing (2), one end of the displacement rod (3) is connected to the gear rod (1), and a tooth groove is provided on the displacement rod (3); A rotating shaft (4), the rotating shaft (4) being rotatably mounted in the housing (2), and the rotating shaft (4) being provided with a gear ring corresponding to the tooth groove of the displacement rod (3); Transmission mechanism; A driving source (5), wherein the driving source (5) is adapted to drive the rotating shaft (4) to rotate through the transmission mechanism, and then the gear ring of the rotating shaft (4) is meshed with the tooth groove of the displacement rod (3), so that the displacement rod (3) performs linear motion, thereby adjusting the displacement amount of the gear rod (1) of the injector.

2. The rack rod position actuator for a fuel injector according to claim 1, characterized in that: It also includes a rotation angle detection structure, the rotation angle detection structure including: An angle sensor (6), the angle sensor (6) being fixed inside the housing (2); Transmission components; The angle sensor (6) is suitable for collecting angle information of the rotating shaft (4) through the transmission component.

3. The rack rod position actuator for a fuel injector according to claim 2, characterized in that: The angle sensor (6) is a rotary potentiometer.

4. The rack rod position actuator for a fuel injector according to claim 2, characterized in that: The transmission assembly comprises: A driving gear, the driving gear being fixed on the other end of the rotating shaft (4); A driven gear, the driven gear being fixed on the input of the angle sensor (6); The angle sensor (6) is suitable for collecting the rotational movement of the rotating shaft (4) through the meshing transmission of the driving gear and the driven gear.

5. The rack rod position actuator for a fuel injector according to claim 1, characterized in that: The transmission mechanism comprises: A worm wheel, the worm wheel being coaxially connected to one end of the rotating shaft (4); A worm, the worm being mounted on the output end of the driving source (5), the worm being meshingly connected with the worm wheel; The driving source (5) is suitable for driving the worm wheel to rotate through the worm, thereby driving the rotating shaft (4) to rotate.

6. The rack rod position actuator for a fuel injector according to claim 1, characterized in that: The driving source (5) is a motor.

7. The rack rod position actuator for a fuel injector according to claim 1, characterized in that: At least one limiting protrusion is provided on the displacement rod (3), and the limiting protrusion is suitable for limiting the travel range of the displacement rod (3) in the housing (2).

8. A fuel injector, characterized in that: The invention comprises a rack rod position actuator for a fuel injector according to any one of claims 1 to 7.

Images