Sensor support, engine and vehicle

Abstract

The utility model discloses a sensor support, an engine and a vehicle, and relates to the technical field of engine sensors, the sensor support comprises a mounting plate and a fixing plate, the mounting plate is connected with the fixing plate; the mounting plate is provided with a mounting hole and a fixing hole, the mounting hole is used for accommodating the sensor body, and the fixing hole fixes the connecting end of the sensor and the mounting plate through a fixing piece; the fixing plate is provided with first positioning holes and first connecting holes, the first connecting holes are symmetrically formed in the two ends of the fixing plate, the first positioning holes are formed between the first connecting holes, the first connecting holes are used for fixing the fixing plate to the engine, and the first positioning holes are used for locking the position of the fixing plate, so that the sensor can detect information of the speed reducer. And electromagnetic interference generated by the range extender is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of engine sensors, in particular to a sensor bracket, an engine and a vehicle. Background Art

[0002] In order to enable the engine control unit to accurately regulate fuel injection, a sensor is installed on the flywheel housing at the rear end of the engine to collect signals of the crankshaft rotation angle, position and engine speed. However, at present, some engines are also provided with a range extender on the flywheel housing. When the range extender is running, it will generate electromagnetic interference, resulting in distortion of the crankshaft rotation information detected by the sensor, making the fuel injection amount regulated by the control unit inaccurate and causing abnormal engine power.

[0003] In summary, how to avoid the electromagnetic interference generated by the range extender from affecting the crankshaft rotation information collected by the sensor is an urgent problem to be solved by those skilled in the art. Content of the Utility Model

[0004] The purpose of the utility model is to provide a sensor bracket, an engine and a vehicle. The sensor bracket enables the sensor to be arranged at the front end of the engine, and solves the technical problem that the electromagnetic interference generated by the range extender affects the crankshaft rotation information collected by the sensor.

[0005] To achieve the above purpose, the utility model provides a sensor bracket, including:

[0006] An installation plate and a fixing plate, the installation plate and the fixing plate are connected;

[0007] The installation plate is provided with an installation hole and a fixing hole. The installation hole is used to accommodate the sensor body, and the fixing hole fixes the connection end of the sensor to the installation plate through a fixing member;

[0008] The fixing plate is provided with a first positioning hole and a first connection hole. Each first connection hole is symmetrically arranged at both ends of the fixing plate. The first positioning hole is arranged between each first connection hole. Each first connection hole is used to fix the fixing plate to the engine, and the first positioning hole is used to lock the position of the fixing plate.

[0009] Preferably, the installation hole is a through hole, and the inner diameters of both ends of the inner wall of the installation hole are different, so that an annular step surface is formed in the installation hole, and the annular step surface is used to carry the sensor.

[0010] Preferably, the setting direction of the installation plate is perpendicular to the setting direction of the fixing plate. The setting directions of the installation hole and the fixing hole are along the thickness direction of the installation plate, and the setting directions of the first positioning hole and each first connection hole are along the thickness direction of the fixing plate.

[0011] Preferably, the number of the first positioning holes is several, and each first positioning hole is symmetrically distributed on both sides of the symmetry axis of the fixing plate.

[0012] Preferably, a positioning pin is provided in the first positioning hole, and the radius of the first positioning hole is smaller than that of the positioning pin. The positioning pin and the first positioning hole are connected by interference fit.

[0013] Preferably, the end of the mounting plate facing away from the fixing plate has a tapered structure. The edge of the tapered structure has an arc chamfer. The fixing hole is provided at one end of the tapered structure facing away from the fixing plate. The mounting hole is closer to the fixing plate than the fixing hole, and at least a part of the mounting hole is located within the tapered structure.

[0014] Preferably, both ends of the fixing plate have an arc structure. The arc structure is a cylinder, and the axis of the cylinder extends along the length direction of the mounting plate. The first connection hole is provided in the arc structure, and the first connection hole penetrates through the two end faces of the cylinder.

[0015] Preferably, the sensor bracket is integrally formed.

[0016] An engine includes the sensor bracket as described above, and a sensor is provided on the sensor bracket.

[0017] A vehicle includes the engine as described above.

[0018] Compared with the above background art, the sensor bracket provided by the present utility model includes a mounting plate and a fixing plate. The mounting plate is provided with a mounting hole, and the mounting hole provides a setting space for the sensor. At the same time, to prevent the sensor from shifting or rotating in the mounting hole, resulting in abnormal operation of the sensor, a fixing hole is provided on one side of the mounting hole, so that the fixing member penetrates through the sensor and the fixing hole, fixedly connecting the sensor to the mounting plate and restricting the movement of the sensor. The fixing plate is provided with a positioning hole and two first connection holes. The fixing member mounts the fixing plate on the engine through the first connection holes, and the two second positioning holes are symmetrically distributed on both sides of the fixing plate, restricting the planar degree of freedom of the fixing plate and preventing the fixing plate from rotating. In addition, a positioning hole is also provided on the fixing plate between the first connection holes. The positioning pin cooperates with the positioning hole and the engine to accurately position the position of the sensor bracket, ensuring that the sensor on the mounting plate can accurately receive the rotation signal of the crankshaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0020] Figure 1 Structural diagram of the sensor bracket provided by the embodiment of the present utility model;

[0021] Wherein:

[0022] 1 - mounting plate; 2 - fixing plate; 3 - mounting hole; 31 - annular step surface; 4 - first connection hole; 5 - fixing hole; 6 - first positioning hole Specific embodiments

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] In order to enable those skilled in the art in this technical field to better understand the solution of the present invention, the present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0025] The present invention provides a sensor bracket, which can realize the installation of a sensor. Specifically, the sensor can be a crankshaft sensor used on an engine. By collecting the crankshaft rotation angle, position, and engine speed signals and transmitting them to the engine control unit, fuel injection can be controlled. That is, the sensor bracket described herein can be used to arrange the crankshaft sensor at one end of the engine where a shock absorber is provided, avoiding interference of the sensor by the electromagnetic waves generated by the range extender.

[0026] As shown in the attached Figure 1 specification, the sensor bracket includes a mutually connected mounting plate 1 and a fixing plate 2. A mounting hole 3 is provided in the middle part of the mounting plate 1, and a sensor body is arranged in the mounting hole 3, so that the outer side of the sensor body fits against the inner wall of the mounting hole 3. In addition, a fixing hole 5 is provided on one side of the mounting plate 1, and the connection end of the sensor is fixedly connected to the fixing hole 5. The mounting hole 3 determines the specific position of the sensor on the bracket, and the fixing hole 5 prevents the sensor from rotating in the mounting hole 3, so that the signals received by the sensor are inaccurate. A fixing plate 2 is connected to one end of the mounting plate 1, and the fixing plate 2 mounts the entire sensor bracket at the target detection location. The fixing plate 2 is provided with first connection holes 4, and the first connection holes 4 are symmetrically distributed at both ends of the fixing plate 2. After the sensor bracket is installed, the two connection holes 4 prevent the fixing plate 2 from deviating from the preset installation position on the plane in contact with the engine by restricting the degrees of freedom of the fixing plate 2, resulting in the situation that the detection result of the sensor on the mounting plate 1 of the sensor bracket is distorted or cannot be detected. In addition, a plurality of first positioning holes 6 are provided between the two first connection holes 4 of the mounting plate 1, and each first positioning hole 6 cooperates with the engine through a positioning pin, further determining the installation position of the fixing plate 2 in the engine.

[0027] Further, the mounting hole 3 provided on the mounting plate 1 is specifically a through hole. After the sensor is disposed in the mounting hole 3, signals sent by the detection target can be received on both sides of the sensor. In addition, the aperture diameters of the two side ports of the mounting hole 3 are different. The aperture diameter of one side port is the same as the radius of the sensor side wall, and the aperture diameter of the other side port is smaller than the radius of the sensor side wall. The two side ports maintain their respective aperture diameters and extend respectively towards the inside of the mounting plate 1 to form an annular step surface 31 inside the mounting plate 1. The sensor is disposed on the side with the larger aperture diameter, and the annular step surface 31 abuts against the sensor to carry the sensor and restrict the degree of freedom of the sensor in the axial direction of the mounting hole 3, preventing the sensor from sliding in the mounting hole 3.

[0028] Since the fixing plate 2 is arranged by closely attaching the side plane to the inner wall of the engine housing, and the detection target is the shock absorber inside the engine. To make the sensor close to the shock absorber and detect it, the setting direction of the mounting plate 1 is perpendicular to the inner wall of the housing, so that the mounting hole 3 for setting the sensor should extend into the engine. That is to say, the mounting plate 1 is an extension of the middle part of the fixing plate 2 in the thickness direction, and the setting direction of the mounting plate 1 is perpendicular to that of the fixing plate 2. In addition, the side wall of the fixing plate 2 fits with the inner wall of the engine housing. To mount the fixing plate 2 on the inner wall of the housing, the setting direction of the first connection hole 4 is along the thickness direction of the fixing plate 2 and perpendicular to the inner wall of the housing, so that the bolt passes through the fixing plate 2 and the engine housing to fixedly connect the two. Similarly, the first positioning hole 6 for precisely positioning the sensor bracket is arranged along the thickness direction of the fixing plate 2, so that the positioning pin can pass through the first positioning hole 6 and the engine housing at the same time, jointly ensuring the stability of the installation of the fixing plate 2 with the first connection hole 4. The setting direction of the mounting hole 3 is perpendicular to the thickness direction of the mounting plate 1, so that the detection part of the sensor is located on the side with a larger area of the mounting plate 1, providing sufficient installation space for the sensor and ensuring that the detection part of the sensor is fully utilized. Furthermore, the setting direction of the fixing hole 5 for preventing the sensor from rotating is the same as that of the mounting hole 3.

[0029] The sensor bracket is a component installed in the engine. The sensor bracket is affected by vibrations, which may cause the fixing bolts set in the first connection holes of the sensor bracket to become loose, affecting the normal operation of the sensor. Therefore, in addition to installing the sensor bracket through the first connection holes, first positioning holes 6 are provided between the first connection holes. To ensure the positioning effect, the number of first positioning holes 6 is several and can be adjusted according to the operating conditions of different engines. Moreover, the first positioning holes 6 are evenly distributed on both sides of the symmetry axis of the fixing plate 2 to ensure the load strength of the fixing plate 2. Positioning pins are installed in the first positioning holes 6 to prevent the fixing bolts in the first connection holes 4 from becoming loose. Or in the case where the fixing bolts have tolerances and cannot be accurately matched with the first connection holes 4, ensure that the sensor bracket remains in the preset position. The diameters of the first positioning holes 6 are set to be smaller than the radius of the positioning pins. The first positioning holes 6 and the positioning pins are connected by an interference fit method. After the positioning pins are fitted with the positioning holes, stress is generated to tightly connect the two, eliminating the influence of the damage of the fixing bolts or the insufficient fitting accuracy on the position deviation of the sensor bracket.

[0030] After the sensor is connected to the engine, under the combined action of the self-weight of the sensor and the mounting plate 1 and the vibrations of the engine, the connection between the mounting plate 1 and the fixing plate 2 bears a large load. To ensure the strength of the sensor structure, arc chamfers are provided at the two side edges of the connection between the mounting plate 1 and the fixing plate 2 to make the load distribution at the edge of the connection between the mounting plate 1 and the fixing plate 2 uniform. In addition, to ensure the load strength at the connection between the mounting plate 1 and the fixing plate 2, holes or slots that change the load distribution should not be provided at the connection between the mounting plate 1 and the fixing plate 2. Therefore, the fixing holes 5 for determining the position of the sensor should be provided at one end of the mounting plate 1 facing away from the fixing plate 2. In the case of accurately positioning the sensor, to reduce production costs, one end of the mounting plate 1 with the fixing holes 5 is of a tapered structure, and the reduction direction is gradually away from the fixing plate 2, that is, the fixing holes 5 are provided at the narrower end of the tapered structure.

[0031] To ensure the load strength at the fixing holes 5, arc chamfers are provided at the edges of the fixing holes 5 to make the load distribution at the fixing holes 5 uniform. Since the fixing holes 5 and the mounting holes 3 jointly ensure the stable installation of the sensor, the mounting holes 3 are provided at the wider middle part of the mounting plate 1, that is, the mounting holes 3 are closer to the fixing plate 2 than the fixing holes 5, providing enough installation space for the sensor, and the interval between the two holes should not be too large. Therefore, part of the mounting holes 3 is located within the tapered structure.

[0032] The first connection hole 4 that integrally connects the sensor bracket to the inner wall of the engine bears a greater load. To prevent the first connection hole 4 from deforming or breaking due to low strength, resulting in the inability to accurately detect target information, cylindrical arc structures are provided at both ends of the fixing plate 2. The axis of the cylinder extends along the length direction of the mounting plate 1, and the diameter of the cylinder is greater than the thickness of the sensor bracket. The first connection hole 4 is a through hole that penetrates both end faces of the cylinder, and the axis of the first connection hole 4 coincides with the axis of the cylinder, changing the outer wall structure of the first connection hole 4 to increase the load it can bear.

[0033] The sensor bracket can be integrally formed to ensure the overall structure of the sensor bracket is stable and reliable, making the installation of the sensor more stable and effective.

[0034] In addition, the present utility model also provides an engine. The housing of the engine is provided with holes identical to those of the fixing plate 2, namely the second connection hole and the second positioning hole respectively. The relative positions of the second fixing holes and the second connection holes are the same as the distribution of the holes on the fixing plate 2. Both the second positioning holes and the second connection holes are through holes, and are arranged on the shock absorber side near the rear end of the engine housing, so that the installed sensor is away from the front-end range extender, avoiding electromagnetic interference from the range extender to the sensor. The sensor bracket can make the side of the fixing plate 2 fit against the inner wall of the engine housing, and at the same time make the holes on the fixing plate 2 correspond to the through holes on the housing. The positioning pins and fixing bolts are respectively arranged in the butted holes, so that the sensor bracket is accurately fixed at the target position on the engine housing.

[0035] The present utility model also provides a vehicle, including the above-mentioned engine. For other components of the vehicle, reference can be made to the related art and will not be elaborated here.

[0036] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0037] In this article, specific examples are used to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the present utility model.

Claims

1. A sensor bracket, characterized in that: It comprises a mounting plate (1) and a fixing plate (2), wherein the mounting plate (1) and the fixing plate (2) are connected; The mounting plate (1) is provided with a mounting hole (3) and a fixing hole (5), the mounting hole (3) being used to accommodate the sensor body, and the fixing hole (5) fixing the connecting end of the sensor to the mounting plate (1) via a fixing piece; The fixing plate (2) is provided with a first positioning hole (6) and a first connecting hole (4), each of the first connecting holes (4) is symmetrically arranged at two ends of the fixing plate (2), the first positioning hole (6) is arranged between each of the first connecting holes (4), each of the first connecting holes (4) is used to fix the fixing plate (2) on the engine, and the first positioning hole (6) is used to lock the position of the fixing plate (2).

2. The sensor bracket according to claim 1, characterized in that: The mounting hole (3) is a through hole, and the diameters of the two ends of the inner wall of the mounting hole (3) are different, so that an annular step surface (31) is provided in the mounting hole (3), and the annular step surface (31) is used to carry the sensor.

3. The sensor bracket according to claim 2, characterized in that: The installation direction of the mounting plate (1) is perpendicular to the installation direction of the fixing plate (2); the installation directions of the mounting holes (3) and the fixing holes (5) are along the thickness direction of the mounting plate (1); and the first positioning holes (6) and each of the first connecting holes (4) are along the thickness direction of the fixing plate (2).

4. The sensor bracket according to claim 1, characterized in that: The first positioning holes (6) are provided in a plurality of numbers, and the first positioning holes (6) are symmetrically distributed on both sides of the symmetry axis of the fixing plate (2).

5. The sensor bracket according to any one of claims 1 to 4, characterized in that: The first positioning hole (6) is provided with a positioning pin, and the radius of the first positioning hole (6) is smaller than the radius of the positioning pin, and the positioning pin is connected to the first positioning hole (6) by interference fit.

6. The sensor bracket according to any one of claims 1 to 4, characterized in that: The end of the mounting plate (1) facing away from the fixing plate (2) is a tapered structure, the edge of the tapered structure has an arc-shaped chamfer, the fixing hole (5) is arranged at the end of the tapered structure facing away from the fixing plate (2), the mounting hole (3) is closer to the fixing plate (2) than the fixing hole (5), and at least a part of the mounting hole (3) is located within the tapered structure.

7. The sensor bracket according to any one of claims 1 to 4, characterized in that: The fixing plate (2) has an arc-shaped structure at both ends, the arc-shaped structure is a cylinder, the axis of the cylinder extends along the length direction of the mounting plate (1), the first connection hole (4) is provided in the arc-shaped structure, and the first connection hole (4) is penetrated through the two end faces of the cylinder.

8. The sensor bracket according to any one of claims 1 to 4, characterized in that: The sensor bracket is integrally formed.

9. An engine, characterized in that: The sensor bracket comprises a sensor bracket as described in any one of claims 1 to 8, wherein a sensor is provided on the sensor bracket.

10. A vehicle, characterized in that: Comprising an engine as claimed in claim 9 above.

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