Engine, power assembly and vehicle

Abstract

The utility model discloses an engine, power assembly and vehicle, engine includes: cylinder, crankshaft and rotational speed detection unit, crankshaft is rotatablely provided in the cylinder, rotational speed detection unit is used for detecting the rotational speed of crankshaft and includes rotational speed signal panel and rotational speed sensor, rotational speed signal panel is provided in the crankshaft and is located in the cylinder, rotational speed sensor is located in the cylinder. The rotating speed sensor is used for detecting rotating speed of the rotating speed signal panel. According to the engine, the rotating speed signal panel is arranged on the portion, located in the cylinder body, of the crankshaft, the vibration amplitude of the rotating speed signal panel can be reduced, the risk that the rotating speed signal panel is exposed and corroded can be avoided, and therefore the stability of the rotating speed sensor for picking up the rotating speed of the rotating speed signal panel can be improved; the accuracy of acquiring the crankshaft rotating speed by the rotating speed detection unit is improved, and the service life of the rotating speed signal panel is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle parts, in particular to an engine, a power assembly and a vehicle. Background Art

[0002] During the operation of the engine, in order to detect the speed of the crankshaft, a speed gear is usually set on the crankshaft, and the speed gear rotates synchronously with the crankshaft. The speed sensor obtains the speed of the speed gear to obtain the speed of the crankshaft. However, in the related art, the speed gear is usually set at both ends of the crankshaft, such as on the flywheel side or on the shock absorber, the vibration amplitude is relatively large and there is a risk of exposed corrosion. In addition, in the extended-range powertrain, the motor is set on the flywheel side, and the magnetic field of the motor is easy to interfere with the speed sensor, which directly affects the accuracy of the speed sensor in obtaining the crankshaft speed. Utility Model Content

[0003] The utility model provides an engine in a first aspect. The engine has the advantage that a rotation speed detection unit can obtain a crankshaft rotation speed with high accuracy.

[0004] The engine according to the first embodiment of the utility model includes: a cylinder body; a crankshaft rotatably arranged in the cylinder body; a speed detection unit, which is used to detect the speed of the crankshaft and includes a speed signal disk and a speed sensor, wherein the speed signal disk is arranged on the crankshaft and located in the cylinder body, and the speed sensor is used to detect the speed of the speed signal disk.

[0005] According to the engine of the first aspect of the utility model, by setting the speed signal disk on the part of the crankshaft located in the cylinder body, the vibration amplitude of the speed signal disk can be reduced, and the risk of exposed corrosion of the speed signal disk can be avoided, thereby improving the stability of the speed sensor picking up the speed of the speed signal disk, thereby improving the accuracy of the speed detection unit in obtaining the crankshaft speed, and facilitating extending the service life of the speed signal disk.

[0006] According to some embodiments of the present invention, the speed signal disk is disposed at a middle position of the crankshaft in the axial direction.

[0007] According to some embodiments of the present invention, the crankshaft includes a crank arm and a main journal connected to each other, and the speed signal disk is located on a side of the crank arm facing the adjacent main journal.

[0008] According to some embodiments of the present invention, the crankshaft also includes a reinforcing boss connected between the crank arm and the adjacent main journal, the speed signal disk surrounds the outer peripheral side of the reinforcing boss, and in the axial direction of the crankshaft, the distance between the side of the speed signal disk away from the crank arm and the crank arm is not greater than the length of the reinforcing boss.

[0009] According to some embodiments of the present utility model, the rotational speed signal disk includes: an outer ring portion, formed in a ring shape and having a plurality of signal teeth formed on the outer peripheral wall thereof and arranged circumferentially along the crankshaft; a connecting portion, provided in plurality and arranged at intervals circumferentially along the inner peripheral wall of the outer ring portion, and a connecting hole for connecting with the crankshaft is formed on the connecting portion.

[0010] According to some embodiments of the present utility model, the crankshaft further includes a balance weight connected to the crank arm, at least part of the plurality of connecting portions is connected to the crank arm, and at least part of the plurality of connecting portions is connected to the balance weight.

[0011] According to some embodiments of the present utility model, the plurality of connecting portions include a first connecting portion connected to the crank arm and a second connecting portion connected to the balance weight, the number of the second connecting portions is greater than the number of the first connecting portions, and the projection of the first connecting portion on a reference plane is greater than the projection of the second connecting portion on the reference plane, and the reference plane is perpendicular to the axial direction of the crankshaft.

[0012] According to some embodiments of the present utility model, an installation hole penetrating the inner and outer surfaces is formed on the cylinder block, and the rotational speed sensor is arranged in the installation hole.

[0013] The second aspect of the present utility model also proposes a power assembly.

[0014] The power assembly according to the embodiments of the second aspect of the present utility model includes: a driving motor; the above-mentioned engine, one end of the crankshaft is connected with a flywheel, and the driving motor is in transmission connection with the flywheel.

[0015] According to the power assembly of the embodiments of the second aspect of the present utility model, by arranging the rotational speed signal disk on the part of the crankshaft located in the cylinder block, the vibration amplitude of the rotational speed signal disk can be reduced, the risk of the rotational speed signal disk being exposed to corrosion can be avoided, and at the same time, the interference of the electromagnetic field during the operation of the driving motor on the rotational speed sensor can be reduced, so as to ensure the accuracy of the rotational speed sensor for picking up the rotational speed of the rotational speed signal disk.

[0016] The third aspect of the present utility model also proposes a vehicle.

[0017] The vehicle according to the embodiments of the third aspect of the present utility model includes: the above-mentioned power assembly.

[0018] According to the vehicle of the embodiments of the third aspect of the present utility model, by arranging the rotational speed signal disk on the part of the crankshaft located in the cylinder block, the vibration amplitude of the rotational speed signal disk can be reduced, the risk of the rotational speed signal disk being exposed to corrosion can be avoided, and at the same time, the interference of the electromagnetic field during the operation of the driving motor on the rotational speed sensor can be reduced, so as to ensure the accuracy of the rotational speed sensor for picking up the rotational speed of the rotational speed signal disk.

[0019] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0020] Figure 1 is a partial schematic view of an engine according to an embodiment of the present utility model;

[0021] Figure 2 is a partial schematic view of a crankshaft and a rotational speed signal disk of an engine according to an embodiment of the present utility model;

[0022] Figure 3 is a partial cross-sectional view of an engine according to an embodiment of the present utility model.

[0023] Reference Signs:

[0024] 100, engine; 1, cylinder block; 11, mounting hole; 2, crankshaft; 21, crank arm; 22, main journal; 23, reinforcing shoulder; 24, balance weight; 25, connecting rod journal; 31, rotational speed signal disk; 311, outer ring part; 312, connecting part; 312a, first connecting part; 312b, second connecting part; 313, connecting hole; 32, rotational speed sensor; 4, shock absorber; 5, flywheel; 6, fastener. Detailed Embodiment

[0025] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model and should not be construed as limiting the present utility model.

[0026] The following disclosure provides many different embodiments or examples for implementing different structures of the present utility model. To simplify the disclosure of the present utility model, components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present utility model. In addition, the present utility model may repeat reference numerals and / or letters in different examples. Such repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present utility model provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0027] An engine 100 according to an embodiment of the first aspect of the present utility model will be described below with reference to the drawings.

[0028] As Figures 1 to 3As shown, the engine 100 according to the first aspect embodiment of the present utility model includes: a cylinder block 1, a crankshaft 2, and a rotational speed detection unit. The crankshaft 2 is rotatably disposed in the cylinder block 1. The rotational speed detection unit is used to detect the rotational speed of the crankshaft 2 and includes a rotational speed signal disk 31 and a rotational speed sensor 32. The rotational speed signal disk 31 is disposed on the crankshaft 2 and is located within the cylinder block 1. The rotational speed sensor 32 is used to detect the rotational speed of the rotational speed signal disk 31. That is to say, the rotational speed signal disk 31 is disposed on the part of the crankshaft 2 located within the cylinder block 1. And it can be understood that the axial two ends of the crankshaft 2 are free ends, and the vibration amplitude thereof is larger than that of the part of the crankshaft 2 located within the cylinder block 1. Thus, by disposing the rotational speed signal disk 31 within the cylinder block 1, the distance between the rotational speed signal disk 31 and the two ends of the crankshaft 2 can be increased, thereby reducing the influence of the vibration at the two ends of the crankshaft 2 on the rotational speed signal disk 31, and further reducing the vibration amplitude of the rotational speed signal disk 31. Moreover, the cylinder block 1 can provide a good protection effect on the rotational speed signal disk 31. For example, the cylinder block 1 can prevent rainwater, dust, etc. outside the engine 100 from contacting the rotational speed signal disk 31, avoiding the risk of the rotational speed signal disk 31 being exposed and corroded. Thus, the stability of the rotational speed sensor 32 picking up the rotational speed of the rotational speed signal disk 31 can be improved, so as to improve the accuracy of the rotational speed detection unit in obtaining the rotational speed of the crankshaft 2, and it is beneficial to extend the service life of the rotational speed signal disk 31.

[0029] Secondly, when the engine 100 is applied to an extended-range vehicle, the drive motor is usually installed on the flywheel 5 side of the engine 100. By disposing the rotational speed signal disk 31 within the cylinder block 1, the electromagnetic field during the operation of the drive motor on the rotational speed sensor 32 can be reduced, ensuring the accuracy of the rotational speed sensor 32 picking up the rotational speed of the rotational speed signal disk 31.

[0030] For the engine 100 according to the first aspect embodiment of the present utility model, by disposing the rotational speed signal disk 31 on the part of the crankshaft 2 located within the cylinder block 1, the vibration amplitude of the rotational speed signal disk 31 can be reduced, and the risk of the rotational speed signal disk 31 being exposed and corroded can be avoided. Thus, the stability of the rotational speed sensor 32 picking up the rotational speed of the rotational speed signal disk 31 can be improved, so as to improve the accuracy of the rotational speed detection unit in obtaining the rotational speed of the crankshaft 2, and it is beneficial to extend the service life of the rotational speed signal disk 31.

[0031] In a specific example, the engine 100 is a formaldehyde engine, and shock absorbers 4 and flywheels 5 are respectively connected to the two ends of the crankshaft 2.

[0032] According to some embodiments of the present utility model, the rotational speed signal disk 31 is provided at the middle position of the crankshaft 2 in the axial direction. That is to say, in the axial direction of the crankshaft 2, the distances between the rotational speed signal disk 31 and both ends of the crankshaft 2 are the same or approximately the same. Thus, the distances between the rotational speed signal disk 31 and both ends of the crankshaft 2 in the axial direction can be better increased, so that the influence of the vibrations at both ends of the crankshaft 2 on the rotational speed signal disk 31 can be further reduced, thereby improving the accuracy of the rotational speed sensor 32 for picking up the rotational speed of the rotational speed signal disk 31. In addition, the distance between the rotational speed signal disk 31 and the drive motor can be further increased, so that the electromagnetic field of the drive motor during operation on the rotational speed sensor 32 can be further reduced. For example, under the combined action of a sufficiently large spacing distance between the cylinder block 1 and the rotational speed sensor 32 and the drive motor, the interference range of the electromagnetic field of the drive motor can be avoided, so as to ensure the accuracy of the rotational speed sensor 32 for picking up the rotational speed of the rotational speed signal disk 31.

[0033] According to some embodiments of the present utility model, the crankshaft 2 includes a crank arm 21 and a main journal 22 connected to each other, and the rotational speed signal disk 31 is located on one side of the crank arm 21 facing the adjacent main journal 22. It can be understood that, in the axial direction of the crankshaft 2, both sides of the crank arm 21 are respectively connected to the main journal 22 and the connecting rod journal 25, and the connecting rod journal 25 is rotatably connected to the piston. That is, the rotational speed signal disk 31 is provided on the side of the crank arm 21 facing away from the adjacent piston. Thus, the risk of interference between the rotational speed signal disk 31 and the piston of the engine 100 can be avoided, which is beneficial to improving the stability of the rotational speed signal disk 31 and the piston.

[0034] According to some embodiments of the present utility model, the crankshaft 2 further includes a reinforcing shoulder 23 connected between the crank arm 21 and the adjacent main journal 22, and the rotational speed signal disk 31 surrounds the outer peripheral side of the reinforcing shoulder 23. In the axial direction of the crankshaft 2, the distance between the side of the rotational speed signal disk 31 facing away from the crank arm 21 and the crank arm 21 is not greater than the length of the reinforcing shoulder 23. The reinforcing shoulder 23 is coaxially arranged with the main journal 22, and the diameter of the reinforcing shoulder 23 is larger than the diameter of the main journal 22. The connection strength between the main journal 22 and the crank arm 21 can be improved by the reinforcing shoulder 23.

[0035] That is to say, in the axial direction of the crankshaft 2, the side surface of the rotational speed signal disk 31 facing away from the crank arm 21 does not extend beyond the side surface of the reinforcing shoulder 23 facing away from the crank arm 21. For example, the side surface of the rotational speed signal disk 31 facing away from the crank arm 21 may be flush with the side surface of the reinforcing shoulder 23 facing away from the crank arm 21, or the side surface of the rotational speed signal disk 31 facing away from the crank arm 21 may be located on the side of the side surface of the reinforcing shoulder 23 facing away from the crank arm 21 and towards the crank arm 21. It can be understood that the side surface of the reinforcing shoulder 23 facing away from the crank arm 21 is connected to the main journal 22, and the main journal 22 is rotatably connected to the cylinder block 1. Thus, the installation of the rotational speed signal disk 31 can make full use of the space on the outer peripheral side of the reinforcing shoulder 23, with a compact structure. At the same time, the step of separately providing an installation space for the rotational speed signal disk 31 can be omitted, thereby simplifying the modification of the engine 100. In addition, it can be avoided that the rotational speed signal disk 31 occupies the space on the outer peripheral side of the main journal 22 and interferes with the cylinder block 1, so as to improve the reliability of the rotational speed signal disk 31.

[0036] According to some embodiments of the present invention, the rotational speed signal disk 31 includes: an outer ring portion 311 and a connecting portion 312. The outer ring portion 311 is formed in a ring shape, and a plurality of signal teeth arranged along the circumferential direction of the crankshaft 2 are formed on the outer peripheral wall of the outer ring portion 311. The rotational speed sensor 32 obtains the rotational speed of the rotational speed signal disk 31 by sensing the signal teeth. A plurality of connecting portions 312 are provided and are arranged at intervals along the circumferential direction of the crankshaft 2 on the inner peripheral wall of the outer ring portion 311. A connecting hole 313 for connecting with the crankshaft 2 is formed on the connecting portion 312. Therefore, during the assembly process of the rotational speed signal disk 31 and the crankshaft 2, the connecting portion 312 can be fixed on the crankshaft 2 by a fastener 6 passing through the connecting hole 313, so as to fix the rotational speed signal disk 31 on the crank arm 21. Among them, the plurality of connecting portions 312 can increase the connection position between the rotational speed signal disk 31 and the crank arm 21, so as to improve the connection strength between the rotational speed signal disk 31 and the crank arm 21. Moreover, the plurality of spaced-apart connecting portions 312 can omit the structure between the plurality of connecting portions 312, thereby achieving weight reduction and cost reduction.

[0037] In a specific example, the fastener 6 is a threaded fastener. A plurality of threaded holes corresponding to the connecting holes 313 one by one are formed on the crankshaft 2. The threaded fastener passes through the connecting hole 313 and is fixedly connected to the threaded hole, so as to fix the rotational speed signal disk 31 on the crank arm 21.

[0038] According to some embodiments of the present utility model, the crankshaft 2 further includes a balance weight 24 connected to the crank arm 21, and at least a part of the plurality of connecting portions 312 is connected to the crank arm 21, and at least a part of the plurality of connecting portions 312 is connected to the balance weight 24. That is to say, the rotational speed signal disk 31 is fixed on the crankshaft 2 through the connection of a part of the connecting portions 312 to the crank arm 21, and at the same time, the rotational speed signal disk 31 is also fixed on the crankshaft 2 through the connection of a part of the connecting portions 312 to the balance weight 24, that is, the rotational speed signal disk 31 is connected to both the crank arm 21 and the balance weight 24. The crank arm 21 and the balance weight 24 can jointly provide more connection positions for the installation of the rotational speed signal disk 31, thereby improving the connection strength between the rotational speed signal disk 31 and the crankshaft 2.

[0039] According to some embodiments of the present utility model, the plurality of connecting portions 312 includes a first connecting portion 312a connected to the crank arm 21 and a second connecting portion 312b connected to the balance weight 24. The number of the second connecting portions 312b is greater than the number of the first connecting portions 312a, and the projection of the first connecting portion 312a on the reference plane is greater than the projection of the second connecting portion 312b on the reference plane, and the reference plane is perpendicular to the axial direction of the crankshaft 2. It can be understood that in the circumferential direction of the crankshaft 2, the balance weight 24 has a larger size than the crank arm 21, so that the balance weight 24 can provide more connection positions for the rotational speed signal disk 31, and thus a larger number of second connecting portions 312b can be provided to improve the connection strength between the rotational speed signal disk 31 and the balance weight 24. The crank arm 21 can provide relatively fewer connection positions compared with the balance weight 24. By providing the first connecting portion 312a with a larger area, the connection strength between the rotational speed signal disk 31 and the crank arm 21 can be ensured under the condition of relatively fewer connection positions.

[0040] According to some embodiments of the present utility model, an installation hole 11 penetrating the inner and outer surfaces is formed on the cylinder block 1, and the rotational speed sensor 32 is arranged in the installation hole 11. That is to say, the rotational speed sensor 32 is also arranged in the cylinder block 1. Thus, by providing the installation hole 11 on the cylinder block 1 for installing the rotational speed sensor 32, the cost of providing a bracket for installing the rotational speed sensor 32 can be saved, and at the same time, the installation and disassembly difficulty of the rotational speed sensor 32 can be reduced. For example, the rotational speed sensor 32 can be inserted into the installation hole 11 from the outside to the inside to realize the installation of the rotational speed sensor 32, and the rotational speed sensor 32 can be pulled out from the installation hole 11 from the inside to the outside for detection or replacement.

[0041] The following describes a powertrain according to an embodiment of the second aspect of the present utility model.

[0042] According to the powertrain of the second aspect embodiment of the present utility model, it includes: a drive motor and an engine 100. One end of a crankshaft 2 is connected with a flywheel 5, and the drive motor is in transmission connection with the flywheel 5. Thus, through the transmission connection between the drive motor and the flywheel 5, the engine 100 can drive the flywheel 5 to rotate to drive the drive motor to generate electricity. Among them, a speed signal disk 31 is arranged on the part of the crankshaft 2 located in the cylinder block 1, which can reduce the interference of the electromagnetic field during the operation of the drive motor on the speed sensor 32, so as to ensure the accuracy of the speed sensor 32 in picking up the speed of the speed signal disk 31.

[0043] According to the powertrain of the second aspect embodiment of the present utility model, by arranging the speed signal disk 31 on the part of the crankshaft 2 located in the cylinder block 1, the vibration amplitude of the speed signal disk 31 can be reduced, the risk of the speed signal disk 31 being exposed to corrosion can be avoided, and at the same time, the interference of the electromagnetic field during the operation of the drive motor on the speed sensor 32 can be reduced, so as to ensure the accuracy of the speed sensor 32 in picking up the speed of the speed signal disk 31.

[0044] The vehicle according to the third aspect embodiment of the present utility model will be described below.

[0045] The vehicle according to the third aspect embodiment of the present utility model includes a powertrain.

[0046] According to the vehicle of the third aspect embodiment of the present utility model, by arranging the speed signal disk 31 on the part of the crankshaft 2 located in the cylinder block 1, the vibration amplitude of the speed signal disk 31 can be reduced, the risk of the speed signal disk 31 being exposed to corrosion can be avoided, and at the same time, the interference of the electromagnetic field during the operation of the drive motor on the speed sensor 32 can be reduced, so as to ensure the accuracy of the speed sensor 32 in picking up the speed of the speed signal disk 31.

[0047] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0048] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0049] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. An engine, characterized in that: include: Cylinder body; A crankshaft rotatably disposed on the cylinder body; The rotation speed detection unit is used to detect the rotation speed of the crankshaft and includes a rotation speed signal disk and a rotation speed sensor. The rotation speed signal disk is arranged on the crankshaft and located in the cylinder body. The rotation speed sensor is used to detect the rotation speed of the rotation speed signal disk.

2. The engine according to claim 1, characterized in that The speed signal disk is arranged at the middle position of the crankshaft in the axial direction.

3. The engine according to claim 1, characterized in that The crankshaft comprises a crank arm and a main journal connected to each other, and the speed signal disk is located on a side of the crank arm facing the adjacent main journal.

4. The engine according to claim 3, characterized in that The crankshaft also includes a reinforcing boss connected between the crank arm and the adjacent main journal, the speed signal disk surrounds the outer peripheral side of the reinforcing boss, and in the axial direction of the crankshaft, the distance between the side of the speed signal disk away from the crank arm and the crank arm is not greater than the length of the reinforcing boss.

5. The engine according to claim 3, characterized in that The speed signal disk comprises: An outer ring portion is formed in a ring shape and has a plurality of signal teeth arranged along the circumference of the crankshaft formed on an outer peripheral wall of the outer ring portion; The connecting parts are provided in plurality and are arranged on the inner peripheral wall of the outer ring part at intervals along the circumferential direction of the crankshaft. The connecting parts are formed with connecting holes for connecting with the crankshaft.

6. The engine according to claim 5, characterized in that The crankshaft further includes a balancing weight connected to the crank arm, at least a portion of the plurality of connecting portions is connected to the crank arm, and at least a portion of the plurality of connecting portions is connected to the balancing weight.

7. The engine according to claim 6, characterized in that The multiple connecting parts include a first connecting part connected to the crank arm and a second connecting part connected to the balance block, the number of the second connecting parts is greater than the number of the first connecting parts, the projection of the first connecting part on the reference plane is greater than the projection of the second connecting part on the reference plane, and the reference plane is perpendicular to the axial direction of the crankshaft.

8. The engine according to claim 1, characterized in that The cylinder body is formed with a mounting hole penetrating the inner and outer surfaces, and the rotation speed sensor is arranged in the mounting hole.

9. A powertrain, characterized in that: include: Drive motor; According to the engine according to any one of claims 1-8, one end of the crankshaft is connected to a flywheel, and the drive motor is drivingly connected to the flywheel.

10. A vehicle, characterized in that: include: The powertrain according to claim 9.

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