Measuring device for a direct-coupled crankshaft of an engine

Abstract

The utility model discloses a kind of measuring devices of engine direct connection crankshaft, measuring device of engine direct connection crankshaft includes: workbench, first measuring piece and second measuring piece, workbench is equipped with engine fixed surface, engine fixed surface is structured as horizontal plane;First measuring piece includes the first measurement main body and cylinder body measurement probe connected, first measurement main body is arranged on workbench, the axial direction of cylinder body measurement probe is parallel to engine fixed surface;Second measuring piece includes the second measurement main body and crankshaft measurement probe connected, second measurement main body is arranged on workbench, the axial direction of crankshaft measurement probe is parallel to engine fixed surface, crankshaft measurement probe and cylinder body measurement probe are located on the same side of engine fixed surface.The utility model's measuring device of engine direct connection crankshaft can be conveniently and quickly and accurately measured the axial clearance of direct connection crankshaft, ensure assembly quality while also can improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to a measuring device for a direct-drive crankshaft of an engine. Background Technology

[0002] With the technological development of the new energy motor industry, disc-type axial flux motors have emerged. The disc-type rotor effectively increases the diameter and reduces the axial length, thus effectively shortening the axial length of the range extender assembly. While disc motors improve power density, rotor heat dissipation, and force balance, the dual-rotor structure increases the design difficulty of directly connecting the engine crankshaft and the motor rotor. Furthermore, the dimensional changes caused by the cumulative crankshaft axial clearance and dimensional tolerances are directly transmitted to the motor shaft, leading to changes in the air gap between the generator rotor and stator, causing torque fluctuations or even interference faults.

[0003] In engine manufacturing and assembly, the crankshaft's axial clearance is generally below 0.3mm. However, due to the long assembly dimension chain, the axial distance tolerance between the crankshaft and the cylinder block end face reaches approximately 0.9mm. The sum of these two factors results in a change in axial distance of up to 1.2mm. Meanwhile, the air gap between the stator and rotor of the electric motor is only about 1mm. If these dimensions are not precisely controlled, there is a risk of interference and jamming during operation.

[0004] The crankshaft flange of the engine has a mounting surface that cannot be measured with vernier calipers or depth gauges due to its structure. If a coordinate measuring machine is used for inspection, it would require a long transfer and measurement time, which would not meet the normal production cycle. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this invention is to provide a measuring device for a direct-drive crankshaft of an engine. This device can conveniently, quickly, and accurately measure the axial clearance of the direct-drive crankshaft, ensuring assembly quality while also improving production efficiency.

[0006] A measuring device for a direct-drive crankshaft of an engine according to an embodiment of the present invention includes: a worktable having an engine fixing surface, the engine fixing surface being horizontal; a first measuring element including a first measuring body and a cylinder block measuring probe connected together, the first measuring body being disposed on the worktable, the axial direction of the cylinder block measuring probe being parallel to the engine fixing surface; and a second measuring element including a second measuring body and a crankshaft measuring probe connected together, the second measuring body being disposed on the worktable, the axial direction of the crankshaft measuring probe being parallel to the engine fixing surface, the crankshaft measuring probe and the cylinder block measuring probe being located on the same side of the engine fixing surface.

[0007] The measuring device for the direct-connected crankshaft of the engine according to the present invention can quickly measure the axial clearance between the direct-connected crankshaft and the cylinder block, and assemble the rotor and stator by measuring the axial clearance of the direct-connected crankshaft, ensuring that the air gap between the rotor and stator is within the standard range, effectively controlling the quality of engine assembly and improving production efficiency.

[0008] In some embodiments of this utility model, the first measuring body and the cylinder measuring probe are located on the same side of the engine fixed surface. The first measuring body includes a first body and a first connecting rod connected together. The first body is located on the upper side of the engine fixed surface and connected to the cylinder measuring probe. The first connecting rod is perpendicular to the engine fixed surface and connected to the worktable.

[0009] In some embodiments of this utility model, the second measuring body and the crankshaft measuring probe are located on the same side of the engine fixed surface. The second measuring body includes a second body and a second connecting rod connected together. The second body is located on the upper side of the engine fixed surface and connected to the crankshaft measuring probe. The second connecting rod is perpendicular to the engine fixed surface and connected to the worktable.

[0010] In some embodiments of this utility model, the second connecting rod connecting the worktable can also be connected to the worktable via the first connecting rod.

[0011] In some embodiments of this utility model, the first connecting rod is connected to the first body through a first adjusting mechanism, and the second connecting rod is connected to the second body through a second adjusting mechanism. The first adjusting mechanism and the second adjusting mechanism can be moved and adjusted in the horizontal direction.

[0012] In some embodiments of this utility model, the first measuring element and the second measuring element are mechanical dial indicators or digital displacement sensors.

[0013] In some embodiments of this utility model, the workbench includes a base plate and a fixed seat, the fixed seat is connected to the base plate, and the top surface of the fixed seat forms the engine mounting surface.

[0014] In some embodiments of this utility model, the fixing base includes a plurality of fixing rods, which are perpendicular to the base plate and spaced apart.

[0015] In some embodiments of this invention, the plurality of the fixed rods are configured to be vertically adjustable.

[0016] In some embodiments of this utility model, the measuring device includes a crankshaft force application component, which is located on the other side of the engine fixed surface away from the crankshaft measuring probe and the cylinder block measuring probe. The force direction of the crankshaft force application component is parallel to the engine fixed surface and is configured to apply thrust or pull.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 A schematic diagram of the structure of the measuring device for the direct-drive crankshaft, the cylinder block, and the direct-drive crankshaft assembly provided in some embodiments of this utility model.

[0019] Figure label: 100. Measuring device for direct-drive crankshaft; 10. Workbench; 10a. Engine mounting surface; 11. Base plate; 12. Mounting seat; 121. Mounting rod; 20. First measuring element; 21. First measuring body; 211. First main body; 212. First connecting rod; 213. First adjusting mechanism; 22. Cylinder measuring probe; 30. Second measuring element; 31. Second measuring body; 311. Second main body; 312. Second connecting rod; 313. Second adjusting mechanism; 32. Crankshaft measuring probe; 40. Crankshaft force-applying components; 200, cylinder block; 300, direct-drive crankshaft. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying 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 accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Furthermore, features specified as "first" or "second" may explicitly or implicitly include one or more of the same feature, used to distinguish and describe features, without any order or distinction of importance.

[0023] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The following is for reference. Figure 1 This describes a measuring device 100 for a direct-connected crankshaft according to an embodiment of the present invention.

[0025] like Figure 1 As shown, the measuring device 100 for a direct-drive crankshaft of an engine according to an embodiment of the present invention includes: a worktable 10, a first measuring element 20, and a second measuring element 30. The worktable 10 is provided with an engine fixing surface 10a, which is constructed as a horizontal plane. The first measuring element 20 includes a first measuring body 21 and a cylinder block measuring probe 22 connected together. The first measuring body 21 is disposed on the worktable 10, and the axial direction of the cylinder block measuring probe 22 is parallel to the engine fixing surface 10a. The second measuring element 30 includes a second measuring body 31 and a crankshaft measuring probe 32 connected together. The second measuring body 31 is disposed on the worktable 10, and the axial direction of the crankshaft measuring probe 32 is parallel to the engine fixing surface 10a. The crankshaft measuring probe 32 and the cylinder block measuring probe 22 are located on the same side of the engine fixing surface 10a.

[0026] The worktable 10 can refer to a component that supports the measuring device 100 directly connected to the engine crankshaft, and can be, but is not limited to, a frame structure, a plate structure, or a beam structure, etc. The worktable 10 has an engine fixing surface 10a, which is constructed as a horizontal plane, and the shape of the horizontal plane can be, but is not limited to, a circle, a polygon, or an irregular shape, etc.

[0027] The first measuring element 20 can refer to a component mounted on the worktable 10 that measures the position of the cylinder block 200. The first measuring element 20 includes a connected first measuring body 21 and a cylinder block measuring probe 22. The first measuring body 21 can refer to the main body of the first measuring element 20, including a housing and the core components for detection. The cylinder block measuring probe 22 can refer to the measuring end of the first measuring element 20, a component used for contact or non-contact measurement with the cylinder block 200, and can be, but is not limited to, a contact probe, a scanning probe, etc.

[0028] The second measuring element 30 can refer to a component mounted on the worktable 10 and used to measure the position of the crankshaft 300 directly connected to it. The second measuring element 30 includes a connected second measuring body 31 and a crankshaft measuring probe 32. The second measuring body 31 can refer to the main body of the second measuring element 30, including a housing and the core components for detection. The crankshaft measuring probe 32 can refer to the measuring end of the second measuring element 30, used to connect to the position of the crankshaft 300 directly connected to it, and can be, but is not limited to, a contact probe, a scanning probe, etc. The crankshaft measuring probe 32 is located on the same side of the engine mounting surface 10a, and can be located above, below, to the left, or to the right of the cylinder block measuring probe 22. For example, refer to... Figure 1 The crankshaft measuring probe 32 is located below the cylinder block measuring probe 22.

[0029] The engine mounting surface 10a is constructed as a horizontal plane, and the axial directions of the crankshaft measuring probe 32 and the cylinder block measuring probe 22 are parallel to the engine mounting surface 10a. This ensures that the measuring surfaces of the crankshaft and the direct-connected crankshaft 300 are perpendicular to the measuring directions of the cylinder block measuring probe 22 and the crankshaft measuring probe 32, thereby ensuring the effectiveness of the axial clearance measurement of the direct-connected crankshaft 300.

[0030] In the above technical solutions, refer to Figure 1The engine's direct-drive crankshaft 300 is connected to the rotor, and the rotor is connected to the stator. Before assembling the rotor and stator, the direct-drive crankshaft 300 is installed inside the engine block 200. The direct-drive crankshaft 300 engages with the cylinder block 200 via right and left thrust washers, and there is an axial clearance between the direct-drive crankshaft 300 and the cylinder block 200 necessary for free movement. The direct-drive crankshaft 300 can move axially, allowing the cylinder block 200 to be mounted on the engine fixed surface 10a. The cylinder block 200 is limited by the worktable 10. The cylinder block measuring probe 22 and the crankshaft measuring probe 32 are located on the right side of the direct-drive crankshaft 300 in the axial direction. The cylinder block measuring probe 22 measures the position parameters of the cylinder block 200, and the marked position value is A. A force is applied to the right of the direct-drive crankshaft 300, causing it to adhere to the right-side thrust washer. The position parameter of the direct-drive crankshaft 300 can be measured using the crankshaft measuring probe 32, and the position value is marked as B1. Then, a force is applied to the left of the direct-drive crankshaft 300, causing it to adhere to the left-side thrust washer. Another position parameter of the direct-drive crankshaft 300 can be measured using the crankshaft measuring probe 32, and the position value is marked as B2. B1-A represents the upper limit of the axial clearance of the direct-drive crankshaft 300, and B2-A represents the lower limit. The rotor and stator are assembled using these upper and lower limits of the axial clearance of the direct-drive crankshaft 300, and the clearance between the rotor and stator is controlled. The right-side and left-side thrust washer are internal engine components.

[0031] It should be noted that, in the above technical solution, the method of applying external force to the direct-drive crankshaft 300 can be, but is not limited to, applying force manually or by machine.

[0032] According to the measuring device 100 for the direct crankshaft of the engine according to the present invention, the axial clearance between the direct crankshaft 300 and the cylinder block 200 can be quickly measured, and the rotor and stator can be assembled by measuring the axial clearance of the direct crankshaft 300, ensuring that the air gap between the rotor and stator is within the standard range, effectively controlling the quality of engine assembly and improving production efficiency.

[0033] In some embodiments of this utility model, reference is made to Figure 1 The first measuring body 21 and the cylinder measuring probe 22 are located on the same side of the engine fixed surface 10a. The first measuring body 21 includes a first body 211 and a first connecting rod 212 connected together. The first body 211 is located on the upper side of the engine fixed surface 10a and is connected to the cylinder measuring probe 22. The first connecting rod 212 is perpendicular to the engine fixed surface 10a and is connected to the worktable 10.

[0034] The connection method between the first body 211 and the cylinder measuring probe 22 can be, but is not limited to, snap-fit ​​connection, bolt connection, riveting, etc.

[0035] In the above technical solution, the first measuring body 21 and the cylinder block measuring probe 22 are located on the same side of the engine fixed surface 10a, thus simplifying the arrangement of the first measuring component 20 and facilitating installation and disassembly. The first connecting rod 212 is perpendicular to the engine fixed surface 10a and connects to the worktable 10, which facilitates ensuring that the axial direction of the cylinder block measuring probe 22 is parallel to the engine fixed surface 10a, thereby facilitating installation.

[0036] In some embodiments of this utility model, reference is made to Figure 1 The second measuring body 31 and the crankshaft measuring probe 32 are located on the same side of the engine fixed surface 10a. The second measuring body 31 includes a second body 311 and a second connecting rod 312 connected together. The second body 311 is located on the upper side of the engine fixed surface 10a and connected to the crankshaft measuring probe 32. The second connecting rod 312 is perpendicular to the engine fixed surface 10a and connected to the worktable 10.

[0037] The connection between the second body 311 and the crankshaft measuring probe 32 can be, but is not limited to, a snap-fit ​​connection, a bolt connection, a riveting method, etc.

[0038] In the above technical solution, the second measuring body 31 and the crankshaft measuring probe 32 are located on the same side of the engine fixed surface 10a, thus simplifying the arrangement of the second measuring component 30 and facilitating installation and disassembly. The second connecting rod 312 is perpendicular to the engine fixed surface 10a and connects to the worktable 10, which facilitates ensuring that the axial direction of the crankshaft measuring probe 32 is parallel to the engine fixed surface 10a, thereby simplifying installation.

[0039] In some embodiments of this utility model, reference is made to Figure 1 The second connecting rod 312 can also be used to connect the worktable 10 via the first connecting rod 212.

[0040] In the above technical solution, the second connecting rod 312 is connected to the worktable 10 through the first connecting rod 212. This allows both the first measuring component 20 and the second measuring component 30 to be installed on the worktable 10 or removed from the worktable 10 through the first connecting rod 212, which reduces the installation or disassembly steps and is beneficial for subsequent maintenance.

[0041] In some embodiments of this utility model, reference is made to Figure 1 The first connecting rod 212 is connected to the first body 211 through the first adjusting mechanism 213, and the second connecting rod 312 is connected to the second body 311 through the second adjusting mechanism 313. The first adjusting mechanism 213 and the second adjusting mechanism 313 can be moved and adjusted in the horizontal direction.

[0042] "Horizontal direction" can be referenced. Figure 1The left and right directions. The first adjustment mechanism 213 and the second adjustment mechanism 313 can be, but are not limited to, linear modules, linear motors, etc.

[0043] In the above technical solution, the first adjustment mechanism 213 and the second adjustment mechanism 313 can be moved and adjusted in the horizontal direction, thereby adjusting the horizontal position of the cylinder block measuring probe 22 and the crankshaft measuring probe 32, so as to move closer to or further away from the cylinder block 200 and the direct-connected crankshaft 300. It can be flexibly adjusted as needed to adapt to different specifications of engines, thereby improving the flexibility of the measuring device 100 for the direct-connected crankshaft of the engine.

[0044] In some embodiments of this utility model, reference is made to Figure 1 The first measuring element 20 and the second measuring element 30 are mechanical dial indicators or digital displacement sensors.

[0045] In the above technical solutions, if the first measuring element 20 and the second measuring element 30 are mechanical dial indicators, they do not rely on electricity, have strong anti-electromagnetic interference capabilities, are suitable for harsh industrial environments such as strong electromagnetic fields, oil stains, and humidity, and have a robust structure and are impact-resistant, which can improve the reliability of the first measuring element 20 and the second measuring element 30. If the first measuring element 20 and the second measuring element 30 are digital display displacement sensors, the readings are intuitive and do not require manual interpretation, enabling automated and digital measurement and improving measurement efficiency.

[0046] In some embodiments of this utility model, reference is made to Figure 1 The workbench 10 includes a base plate 11 and a fixed seat 12. The fixed seat 12 is connected to the base plate 11, and the top surface of the fixed seat 12 forms the engine mounting surface 10a.

[0047] The mounting base 12 can be, but is not limited to, a limiting block, a contour support, an adjustable support, an angle bracket, or a modular fixture, etc. For example, the mounting base 12 can be a mounting block with limiting blocks around its perimeter, so that the cylinder block 200 can be stably fixed on the engine mounting surface 10a under the limiting of the limiting blocks.

[0048] In the above technical solution, the design of the base plate 11 and the fixed seat 12 can limit and level the cylinder block 200, prevent the cylinder block 200 from moving when an external force is applied to the direct-connected crankshaft 300, and make the cylinder block 200, the cylinder block measuring probe 22 and the crankshaft measuring probe 32 parallel in the axial direction of the direct-connected crankshaft 300, thereby improving the accuracy of the measurement results.

[0049] In some embodiments of this utility model, reference is made to Figure 1 The fixing base 12 includes multiple fixing rods 121, which are perpendicular to the connecting base plate 11 and spaced apart.

[0050] In the above technical solution, multiple fixing rods 121 are perpendicular to the connecting base plate 11 and spaced apart, which can reduce the material of the fixing seat 12, facilitate the installation and transportation of the workbench 10, and also save costs.

[0051] In some embodiments of this utility model, reference is made to Figure 1 Multiple fixing rods 121 are configured to be vertically adjustable. It is understood that the fixing rods 121 can be, but are not limited to, components that enable vertical adjustment such as cylinders, hydraulic rods, or electric actuators.

[0052] In the above technical solution, multiple fixing rods 121 are configured to be vertically adjustable. By adjusting the length of the fixing rods 121 in the vertical direction, the engine fixing surface 10a can be adjusted to be horizontal, thereby adjusting the angle of the cylinder block 200 relative to the horizontal direction, ensuring that the cylinder block 200 is parallel in the horizontal direction, improving the reliability of the measuring structure, and thus improving the reliability of the measuring device 100 of the engine direct-connected crankshaft.

[0053] In some embodiments of this utility model, reference is made to Figure 1 The measuring device includes a crankshaft force application component 40, which is located on the engine fixed surface 10a away from the crankshaft measuring probe 32 and the cylinder block measuring probe 22. The force direction of the crankshaft force application component 40 is parallel to the engine fixed surface 10a and is configured to apply thrust or pull.

[0054] The crankshaft force-applying component 40 can be, but is not limited to, a hydraulic cylinder or pneumatic cylinder, an electric push rod, and a mechanical force-applying mechanism, etc.

[0055] In the above technical solution, an appropriate amount of external force can be applied to the direct-connected crankshaft 300 through the crankshaft force application component 40, ensuring that the direct-connected crankshaft 300 can abut against the left and right thrust washers, thereby ensuring the accuracy of the measurement results and improving the reliability of the engine direct-connected crankshaft measuring device 100. At the same time, it can avoid the need for manual pushing and pulling of the direct-connected crankshaft 300, improving the efficiency of the measurement.

[0056] The following is combined Figure 1 This describes a specific embodiment of the measuring device 100 for the direct-drive crankshaft of an engine according to the present invention.

[0057] The measuring device 100 for the direct-drive crankshaft of the engine includes: a worktable 10, a first measuring element 20, and a second measuring element 30.

[0058] The workbench 10 is provided with an engine fixing surface 10a, which is a horizontal surface, and the cylinder block 200 is fixed on the engine fixing surface 10a.

[0059] The first measuring element 20 is a digital displacement sensor, and includes a first measuring body 21 and a cylinder block measuring probe 22 connected together. The first measuring body 21 and the cylinder block measuring probe 22 are located on the same side of the engine mounting surface 10a. The axial direction of the cylinder block measuring probe 22 is parallel to the engine mounting surface 10a. The first measuring body 21 includes a first body 211 and a first connecting rod 212 connected together. The first body 211 is located on the upper side of the engine mounting surface 10a and connected to the cylinder block measuring probe 22. The first connecting rod 212 is perpendicular to the engine mounting surface 10a and connected to the worktable 10.

[0060] The second measuring element 30 is a digital displacement sensor and includes a connected second measuring body 31 and a crankshaft measuring probe 32, which are located on the same side of the engine fixed surface 10a. The axial direction of the crankshaft measuring probe 32 is parallel to the engine fixed surface 10a and is located below the cylinder block measuring probe 22. The second measuring body 31 includes a connected second body 311 and a second connecting rod 312. The second body 311 is located on the upper side of the engine fixed surface 10a and connected to the crankshaft measuring probe 32. The second connecting rod 312 is perpendicular to the engine fixed surface 10a and is connected to the worktable 10 via the first connecting rod 212.

[0061] In the description of this specification, references to terms such as "some embodiments," "optionally," "furthermore," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0062] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A measuring device for a direct-drive crankshaft of an engine, characterized in that, include: A workbench, wherein the workbench is provided with an engine mounting surface, and the engine mounting surface is constructed to be a horizontal plane; The first measuring element includes a first measuring body and a cylinder measuring probe connected together. The first measuring body is disposed on the worktable, and the axial direction of the cylinder measuring probe is parallel to the engine fixed surface. The second measuring element includes a connected second measuring body and a crankshaft measuring probe. The second measuring body is disposed on the worktable. The axial direction of the crankshaft measuring probe is parallel to the engine fixed surface. The crankshaft measuring probe and the cylinder block measuring probe are located on the same side of the engine fixed surface.

2. The measuring device for a direct-drive crankshaft of an engine according to claim 1, characterized in that, The first measuring body and the cylinder measuring probe are located on the same side of the engine fixed surface. The first measuring body includes a first body and a first connecting rod connected together. The first body is located on the upper side of the engine fixed surface and is connected to the cylinder measuring probe. The first connecting rod is perpendicular to the engine fixed surface and is connected to the worktable.

3. The measuring device for a direct-drive crankshaft of an engine according to claim 2, characterized in that, The second measuring body and the crankshaft measuring probe are located on the same side of the engine fixed surface. The second measuring body includes a second body and a second connecting rod connected together. The second body is located on the upper side of the engine fixed surface and is connected to the crankshaft measuring probe. The second connecting rod is perpendicular to the engine fixed surface and is connected to the worktable.

4. The measuring device for a direct-drive crankshaft of an engine according to claim 3, characterized in that, The second connecting rod can be connected to the worktable, or the worktable can be connected via the first connecting rod.

5. The measuring device for a direct-drive crankshaft of an engine according to claim 3, characterized in that, The first connecting rod is connected to the first body through a first adjusting mechanism, and the second connecting rod is connected to the second body through a second adjusting mechanism. The first adjusting mechanism and the second adjusting mechanism can be moved and adjusted in the horizontal direction.

6. The measuring device for a direct-drive crankshaft of an engine according to any one of claims 1 to 5, characterized in that, The first measuring element and the second measuring element are mechanical dial indicators or digital displacement sensors.

7. The measuring device for a direct-drive crankshaft of an engine according to claim 1, characterized in that, The workbench includes a base plate and a fixed seat, the fixed seat is connected to the base plate, and the top surface of the fixed seat forms the engine mounting surface.

8. The measuring device for a direct-drive crankshaft of an engine according to claim 7, characterized in that, The fixing base includes multiple fixing rods, which are perpendicular to the base plate and spaced apart.

9. The measuring device for a direct-drive crankshaft of an engine according to claim 8, characterized in that, The plurality of the fixed rods are configured to be vertically adjustable.

10. The measuring device for a direct-drive crankshaft of an engine according to any one of claims 1 to 5, 7 to 9, characterized in that, The measuring device includes a crankshaft force application component, which is located on the engine fixed surface away from the crankshaft measuring probe and the cylinder block measuring probe. The force direction of the crankshaft force application component is parallel to the engine fixed surface and is configured to apply thrust or pull.

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