Method and device for measuring duplex transmission shaft

Abstract

The invention relates to the technical field of transmission shafts, in particular to a duplex transmission shaft measuring method and device. The method comprises the steps that the duplex transmission shaft is initially positioned, so that the projection of a first fork shaft and the projection of a second fork shaft in a reference plane form a first preset included angle; based on the completion of the initial positioning, adjusting the position of the middle fork unit, so that the projection of the first fork shaft and the middle fork unit in the reference plane forms a second preset included angle, and the projection of the second fork shaft and the middle fork unit in the reference plane forms a third preset included angle; the first fork shaft is controlled to rotate to a first preset duration, and first interference information of the duplex transmission shaft is detected; therefore, the problem of how to test the limit angle of the two cross shaft universal joints in actual work is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission shafts, and in particular to a method and device for measuring a double transmission shaft. Background Art

[0002] A tandem driveshaft consists of a first driveshaft, a second driveshaft, a connecting section, and a universal cross joint. The first driveshaft is connected to the connecting section via one universal cross joint, while the second driveshaft is connected to the connecting section via another universal cross joint. The universal cross joint accommodates the power transmission requirements of the first and second driveshafts at different angles. To ensure the reliability and safety of the tandem driveshaft in practical applications, it is necessary to test the tandem driveshaft to determine the maximum angles it can withstand during rotation.

[0003] During factory testing of dual-drive shafts, only the first and second drive shafts are set at a specific angle. However, this testing method fails to simulate the actual use of dual-drive shafts in real-world applications, resulting in a high risk of deviation in the first angle between the first drive shaft and the axis of the connecting portion, as well as in the second angle between the second drive shaft and the axis of the connecting portion. This can cause at least one of the first and second angles to fail to reach the set angle. Consequently, the results of dual-drive shaft interference testing are inaccurate. Summary of the Invention

[0004] In order to solve the problem of how to test the limit angles of two cross-axis universal joints in actual work, the present invention provides a double transmission shaft measurement method and device.

[0005] In a first aspect, the present invention provides a method for measuring a double transmission shaft, the method comprising:

[0006] Initially positioning the double-jointed transmission shaft so that the projections of the first fork shaft and the second fork shaft on the reference plane form a first preset angle; wherein the double-jointed transmission shaft includes the first fork shaft, a middle fork unit, the second fork shaft, and two universal joints; the first fork shaft is connected to the middle fork unit via one of the universal joints, and the second fork shaft is connected to the middle fork unit via the other universal joint; when the initial positioning is completed, the first fork shaft and the second fork shaft are both parallel to the reference plane;

[0007] Based on the completion of the initial positioning, adjusting the position of the middle fork unit so that the first fork axis and the projection of the middle fork unit on the reference plane form a second preset angle, and the second fork axis and the projection of the middle fork unit on the reference plane form a third preset angle; wherein the sum of the first preset angle, the second preset angle, and the third preset angle is 180°;

[0008] The first fork shaft is controlled to rotate to a first preset time length, and first interference information of the dual transmission shaft is detected.

[0009] In some embodiments, the universal joint includes a cross shaft; the cross shaft includes an integrally formed shaft body and four shaft heads; the four shaft heads are arranged in a cross; the first fork shaft is rotatably connected to the corresponding two shaft heads; the second fork shaft is rotatably connected to the corresponding two shaft heads; one end of the middle fork unit is rotatably connected to the corresponding two shaft heads, and the other end of the middle fork unit is rotatably connected to the corresponding two shaft heads;

[0010] Before initially positioning the duplex transmission shaft, the duplex transmission shaft measurement method further includes:

[0011] The dual transmission shaft is placed in a first posture so that two of the shaft heads in each of the cross shafts are parallel to the reference plane.

[0012] In some embodiments, the first posture includes that both the shaft heads of the first fork shaft connection are parallel to the reference plane, and both the shaft heads of the second fork shaft connection are parallel to the reference plane.

[0013] In some embodiments, outer surfaces of the first fork shaft, the middle fork unit, and the second fork shaft are all rough surfaces;

[0014] The double transmission shaft measurement method further includes:

[0015] Based on the completion of the first interference information detection, the double transmission shaft is adjusted to a second posture; the first fork shaft, the middle fork unit, and the second fork shaft are each rotated 180 degrees around their own axes to switch from the first posture to the second posture;

[0016] Based on the dual transmission shaft being in the second posture, adjusting the middle fork unit so that the first fork axis and the projection of the middle fork unit on the reference plane form a second preset angle, and the second fork axis and the projection of the middle fork unit on the reference plane form a third preset angle;

[0017] The first fork shaft is controlled to rotate to a second preset time length, and second interference information of the dual transmission shaft is detected.

[0018] In some embodiments, the second preset duration is less than the first preset duration.

[0019] In some embodiments, outer surfaces of the first fork shaft, the middle fork unit, and the second fork shaft are all rough surfaces;

[0020] The double transmission shaft measurement method further includes:

[0021] Based on the completion of the first interference information detection, the double transmission shaft is adjusted to a third posture; the first fork shaft, the middle fork unit, and the second fork shaft are each rotated 90 degrees around their own axes to switch from the first posture to the third posture;

[0022] Based on the dual transmission shaft being in the third posture, adjusting the middle fork unit so that the first fork axis and the projection of the middle fork unit on the reference plane form the second preset angle, and the second fork axis and the projection of the middle fork unit on the reference plane form the third preset angle;

[0023] The first fork shaft is controlled to rotate to a third preset time length, and third interference information of the dual transmission shaft is detected.

[0024] In some embodiments, the third preset duration is shorter than the first preset duration.

[0025] In some embodiments, based on the completion of the third interference information detection, the dual transmission shaft is adjusted to a fourth posture; the first fork shaft, the middle fork unit, and the second fork shaft are each rotated 180 degrees around their own axes to switch from the third posture to the fourth posture;

[0026] Based on the dual transmission shaft being in the fourth posture, adjusting the middle fork unit so that the first fork axis and the projection of the middle fork unit on the reference plane form the second preset angle, and the second fork axis and the projection of the middle fork unit on the reference plane form the third preset angle;

[0027] The first fork shaft is controlled to rotate to a fourth preset time length, and fourth interference information of the dual transmission shaft is detected.

[0028] In some embodiments, the fourth preset duration is shorter than the third preset duration.

[0029] In a second aspect, the present invention provides a measuring device, which is applied to the double transmission shaft measuring method described in any embodiment of the first aspect, and the measuring device includes:

[0030] A fixing assembly, the fixing assembly comprising a fixing base, a first bracket and a first driving unit; the fixing base is fixed in position; the first bracket is connected to the fixing base; the first bracket is used to support the first fork shaft; the first driving unit is used to drive the first fork shaft to rotate around its own axis;

[0031] A middle support assembly, comprising a middle support seat and a second bracket; the position of the middle support seat is adjustable; the second bracket is rotatably connected to the middle support seat around a vertical axis; the second bracket is used to support the middle fork unit;

[0032] The swing assembly includes a swing base, a third bracket and a second driving part; the third bracket is connected to the swing base; the third bracket is used to support the second fork shaft; the second driving part drives the swing base to swing around the vertical axis.

[0033] In order to solve the problem of how to test the limit angles of two cross-axis universal joints in actual work, the present invention has the following advantages:

[0034] By adjusting the position of the middle fork unit, the projection of the first fork shaft and the middle fork unit in the reference plane is made to form a second preset angle, the projection of the second fork shaft and the middle fork unit in the reference plane is made to form a third preset angle, and the sum of the first preset angle, the second preset angle and the third preset angle is 180°. Finally, the first fork shaft is controlled to rotate to the first preset time length and the first interference information of the double transmission shaft is detected. This achieves precise control and coordinated adjustment of the angles between the first fork shaft and the middle fork unit, and between the second fork shaft and the middle fork unit, thereby avoiding angle deviation between the axis of the first fork shaft and the axis of the middle fork unit, and at the same time avoiding angle deviation between the axis of the second fork shaft and the axis of the middle fork unit, ensuring that the extreme angle states of the two universal joints in actual work can be accurately reflected, and improving the accuracy of the interference test of the double transmission shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic flow chart of a method for measuring a double transmission shaft according to an embodiment is shown;

[0036] Figure 2 A schematic diagram showing a measuring device and a double transmission shaft according to an embodiment is shown;

[0037] Figure 3 Shown Figure 2 A top view of the measuring device and the double transmission shaft;

[0038] Figure 4 Shown Figure 2 A front view of the measuring device and the double transmission shaft;

[0039] Figure 5 Shown Figure 3 A simplified diagram of the duplex drive shaft.

[0040] Figure markings: double transmission shaft 10; first fork shaft 11; first fork body 111; first shaft 112; middle fork unit 12; middle left fork 121; connecting body 122; middle right fork 123; second fork shaft 13; second fork body 131; second shaft 132; universal joint 14; shaft body 141; shaft head 142; fixing assembly 20; fixing base 21; first bracket 22; first driving part 23; middle support assembly 30; middle support seat 31; second bracket 32; swing assembly 40; swing base 41; third bracket 42; second driving part 43; first preset angle α1; second preset angle α2; third preset angle α3. DETAILED DESCRIPTION

[0041] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the present disclosure, rather than to imply any limitation on the scope of the present disclosure.

[0042] As used herein, the term "including" and its variations are to be interpreted as open-ended terms meaning "including, but not limited to." The term "based on" is to be interpreted as "based, at least in part, on." The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment." The term "another embodiment" is to be interpreted as "at least one other embodiment." Terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "vertical," "horizontal," "transverse," and "longitudinal" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily intended to better describe the present application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationships. For example, the term "on" may, in certain circumstances, be used to indicate a dependency or connection relationship. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances. Furthermore, the terms "installed," "disposed," "provided with," "connected," and "connected" are to be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements, or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance or quantity of the indicated devices, elements, or components. Unless otherwise specified, "plurality" means two or more.

[0043] Currently, when the dual transmission shaft 10 is factory tested, only the first transmission shaft and the second transmission shaft are set to a specific angle for testing. However, this testing method does not simulate the use of the dual transmission shaft 10 in actual application scenarios, resulting in the first angle between the first transmission shaft and the axis of the connecting part being prone to angle deviation, and the second angle between the second transmission shaft and the axis of the connecting part being prone to angle deviation, so that at least one of the first angle and the second angle does not reach the set angle. Therefore, the interference test results of the dual transmission shaft 10 are not accurate enough. Therefore, in order to solve the above problems, the present invention provides a method for measuring the dual transmission shaft 10.

[0044] Example 1:

[0045] In this embodiment, if Figure 1As shown, the method for measuring the double transmission shaft 10 includes steps S10 to S30, and steps S10 to S30 are described in detail below:

[0046] In step S10, the dual transmission shaft 10 is initially positioned so that the projections of the first fork shaft 11 and the second fork shaft 13 in the reference plane are at a first preset angle α1, simulating the limit state of the dual transmission shaft 10 in actual application. The first preset angle α1 provides a stable reference for subsequent position adjustment and interference detection, ensuring that the subsequent operation is carried out in a standardized initial state, reducing detection errors caused by improper initial position. The dual transmission shaft 10 includes a first fork shaft 11, a middle fork unit 12, a second fork shaft 13 and two universal joints 14. The first fork shaft 11 is connected to the middle fork unit 12 through one of the universal joints 14, and the second fork shaft 13 is connected to the middle fork unit 12 through the other universal joint 14. Since the angle between the first fork shaft 11 and the second fork shaft 13 will change in real time in actual application, this connection structure can flexibly adapt to the dynamic adjustment of the angle to ensure uninterrupted power transmission. When the initial positioning is completed, the first fork axis 11 and the second fork axis 13 are parallel to the reference plane, thereby facilitating the subsequent detection of the first interference information between the universal joint 14 and the middle fork unit 12 .

[0047] like Figure 5 As shown, during actual use of the dual drive shaft 10, the first fork shaft 11 only rotates, while the second fork shaft 13 adjusts its angle based on actual needs. Before the dual drive shaft 10 leaves the factory, the angles of the first fork shaft 11 and the second fork shaft 13 must be tested to ensure that both the second preset angle α2 and the third preset angle α3 reach their operating limits, thereby achieving accurate test results. However, in actual product structural design testing, the physical limits of the second preset angle α2 or the third preset angle α3 are greater than their operating limits. As a result, during testing, when the angle between the first fork shaft 11 and the middle fork unit 12 reaches its physical limit, the angle between the second fork shaft 13 and the middle fork unit 12 will be less than the corresponding operating limit, resulting in inaccurate vehicle test results. Therefore, step S20 is used to adjust the position of the middle fork unit 12 so that both the second preset angle α2 and the third preset angle α3 reach their operating limits.

[0048] Step S20, based on the completion of the initial positioning, adjust the position of the middle fork unit 12 so that the projection of the first fork axis 11 and the middle fork unit 12 in the reference plane forms a second preset angle α2, and the projection of the second fork axis 13 and the middle fork unit 12 in the reference plane forms a third preset angle α3. The sum of the first preset angle α1, the second preset angle α2, and the third preset angle α3 is 180°. By adjusting the first preset angle α1, the second preset angle α2, and the third preset angle α3 formed by the position of the middle fork unit 12, the posture of the double transmission shaft 10 in the working limit state is simulated, so that the second preset angle α2 and the third preset angle α3 reach the working limit value, thereby providing a comprehensive posture basis for the subsequent detection of whether there is interference between the first fork axis 11 and the middle fork unit 12, and the second fork axis 13 and the middle fork unit 12 during the rotation process, thereby ensuring the accuracy of the detection results.

[0049] In step S30, the first fork shaft 11 is controlled to rotate to a first preset time length, the first interference information of the dual transmission shaft 10 is detected, and the rotation state during actual operation is simulated. By detecting the first interference information in this process, it is possible to timely discover whether the universal joint 14 and the middle fork unit 12 corresponding to the first fork shaft 11, and the universal joint 14 and the middle fork unit 12 corresponding to the second fork shaft 13 have mutual collision, friction and other interference problems during the movement process, thereby providing a key basis for judging its working reliability and ensuring the safe operation of the dual transmission shaft 10 in actual applications.

[0050] For example, since the position of the first fork shaft 11 is fixed and cannot deflect, the second preset angle α2 is 30°, and the third preset angle α3 is 20°. However, the working limit value of the second preset angle α2 is 28°, and the working limit value of the third preset angle α3 is 22°. Then only the second preset angle α2 reaches the working limit value, while the third preset angle α3 does not. Therefore, the present application adopts the method of adjusting the position of the middle fork unit 12 to make the second preset angle α2 reach 28° and the third preset angle α3 reach 22°, and then rotates the first fork shaft 11 for the first preset time length to detect the first interference information of the dual transmission shaft 10.

[0051] Furthermore, the universal joint 14 includes a cross shaft. The cross shaft includes an integrally formed shaft body 141 and four shaft heads 142. The four shaft heads 142 are arranged in a cross. The integrally formed structure of the shaft body 141 can enhance the overall strength of the cross shaft and reduce the risk of breakage. The first fork shaft 11 is rotatably connected to the corresponding two shaft heads 142, and the second fork shaft 13 is rotatably connected to the corresponding two shaft heads 142. One end of the middle fork unit 12 is rotatably connected to the corresponding two shaft heads 142, and the other end of the middle fork unit 12 is rotatably connected to the corresponding two shaft heads 142, thereby ensuring that the universal joint 14 has good flexibility when transmitting power and meets the power transmission requirements of different angles.

[0052] Before initially positioning the duplex transmission shaft 10, the duplex transmission shaft 10 measurement method further includes step S40. The duplex transmission shaft 10 measurement method sequentially performs step S40, step S10, step S20, and step S30. Step S40 will be described in detail below:

[0053] In step S40, the dual transmission shaft 10 is placed in a first posture so that two of the shaft heads 142 in each cross shaft are parallel to the reference plane. Through this preset first posture, it is ensured that during the subsequent initial positioning and angle adjustment process, the relative position relationship between the cross shaft and the first fork shaft 11 and the second fork shaft 13 is within a measurable and controllable range, thereby improving the standardization of the entire measurement process and laying the foundation for accurate detection of interference information.

[0054] In other embodiments, the first fork shaft 11 includes a first fork body 111 and a first shaft 112. The first fork body 111 is integrally formed with one end of the first shaft 112, and the other end of the first shaft 112 extends away from the first fork body 111. The first fork body 111 is rotatably connected to two corresponding shaft heads 142. The middle fork unit 12 includes a middle left fork 121, a connector 122, and a middle right fork 123. The middle left fork 121, the connector 122, and the middle right fork 123 are sequentially connected along the length of the connector 122. The middle left fork 121 is recessed toward the connector 122, and the middle right fork 123 is recessed toward the connector 122. The second fork shaft 13 includes a second fork body 131 and a second shaft 132. The second fork body 131 is integrally formed with one end of the second shaft 132, and the other end of the second shaft 132 extends away from the second fork body 131. The second fork body 131 is rotatably connected to two corresponding shaft heads 142.

[0055] Furthermore, the first posture includes the two shaft heads 142 connected to the first fork shaft 11 being parallel to the reference plane, and the two shaft heads 142 connected to the second fork shaft 13 being parallel to the reference plane. In this way, in a stationary state, it is preliminarily determined whether the angle of rotation of the first fork shaft 11 around two of the shaft heads 142 in the cross shaft can reach a first preset angle α1, and whether the angle of rotation of the second fork shaft 13 around two of the shaft heads 142 in the cross shaft can reach a second preset angle α2. Through this preset first posture, it is ensured that during the subsequent initial positioning and angle adjustment process, the relative positional relationship between the cross shaft and the first fork shaft 11 and the second fork shaft 13 is within a measurable and controllable range, thereby improving the standardization of the entire measurement process and laying the foundation for accurate detection of interference information.

[0056] In the double transmission shaft 10, the concave shape of the middle left fork 121 and the middle right fork 123 makes it easy for the shaft head 142 to interfere with the positions of the middle left fork 121 and the middle right fork 123. Therefore, it is preferred to ensure that the double transmission shaft 10 is placed in the first posture, that is, the two shaft heads 142 connected to the first fork shaft 11 are parallel to the reference plane, and the two shaft heads 142 connected to the second fork shaft 13 are parallel to the reference plane, so that the measurement results are more accurate.

[0057] In other embodiments, the outer surfaces of the first fork shaft 11, the middle fork unit 12 and the second fork shaft 13 are all rough surfaces and do not require additional finishing treatment, thereby reducing the processing steps and lowering the manufacturing cost.

[0058] The method for measuring the double transmission shaft 10 further includes step S50, which includes steps S51, S52, and S53. The method for measuring the double transmission shaft 10 sequentially performs steps S40, S10, S20, S30, and S50. Steps S51 to S53 are described in detail below:

[0059] Since the outer surfaces of the first fork shaft 11, the middle fork unit 12 and the second fork shaft 13 are all blank surfaces, the test results of different postures may be different due to the influence of the blank surfaces during the testing process. Therefore, it is necessary to test the double transmission shaft 10 in the second posture.

[0060] In step S51, based on the completion of the first interference information detection, the dual transmission shaft 10 is adjusted to a second posture. The first fork shaft 11, the middle fork unit 12, and the second fork shaft 13 can each be rotated 180° about their respective axes to switch from the first posture to the second posture. This allows interference detection of the two connecting shaft ends 142 on the first fork shaft 11 and the two connecting shaft ends 142 on the second fork shaft 13 at their extreme positions from opposite angles, thereby more comprehensively reflecting the interference conditions of the dual transmission shaft 10 in different postures and improving the integrity of the detection.

[0061] In step S52, based on the dual transmission shaft 10 being in the second posture, the middle fork unit 12 is adjusted so that the projections of the first fork axis 11 and the middle fork unit 12 on the reference plane form a second predetermined angle α2, and the projections of the second fork axis 13 and the middle fork unit 12 on the reference plane form a third predetermined angle α3. This maintains the same angular relationship as in the first posture, ensuring consistency in detection conditions in the first and second postures, and enabling effective comparison of interference information detected in the second posture with that in the first posture.

[0062] Step S53, control the first fork shaft 11 to rotate to the second preset time length, detect the second interference information of the double transmission shaft 10, and verify it with the detection result under the first posture. It can fully grasp the interference situation of the double transmission shaft 10 under different postures and rotation times, and finally determine whether there is an interference problem of the double transmission shaft 10 under different postures, providing sufficient basis for improving the reliability of the double transmission shaft 10 when it is put on the market.

[0063] Furthermore, the second preset duration is shorter than the first preset duration. By shortening the detection duration in the second posture, the overall detection time can be reduced, thereby improving detection efficiency while ensuring that effective interference information can be obtained. Furthermore, because the second posture is a symmetrical state of the first posture, the shorter detection duration can effectively compare the detection results in the first posture, thereby reducing detection costs while ensuring detection accuracy.

[0064] Furthermore, the outer surfaces of the first fork shaft 11, the middle fork unit 12 and the second fork shaft 13 are all blank surfaces. Since the outer surfaces are not assembly surfaces, no additional surface processing is required, which can reduce processing links and lower manufacturing costs.

[0065] The method for measuring the duplex transmission shaft 10 further includes step S60, which includes step S61, step S62, and step S63, step S40, step S10, step S20, step S30, and step S60. Step S60 will be described in detail below:

[0066] Since the outer surfaces of the first fork shaft 11, the middle fork unit 12 and the second fork shaft 13 are all blank surfaces, the test results of different postures may be different due to the influence of the blank surfaces during the testing process. Therefore, it is necessary to test the double transmission shaft 10 in the third posture.

[0067] In step S61, based on the completion of the first interference information detection, the duplex transmission shaft 10 is adjusted to a third posture. The first fork shaft 11, the middle fork unit 12, and the second fork shaft 13 are each rotated 90° about their respective axes to switch from the first posture to the third posture. This allows detection of whether the left fork 121 of the middle fork unit 12 interferes with the first fork shaft 11, and whether the right fork 123 of the middle fork unit 12 interferes with the second fork shaft 13. This more comprehensively reflects the interference conditions of the duplex transmission shaft 10 in different postures, improving detection integrity.

[0068] In step S62, based on the dual transmission shaft 10 being in the third posture, the middle fork unit 12 is adjusted so that the projections of the first fork axis 11 and the middle fork unit 12 on the reference plane form a second predetermined angle α2, and the projections of the second fork axis 13 and the middle fork unit 12 on the reference plane form a third predetermined angle α3. This maintains the same angular relationship as in the first posture, ensuring consistency in detection conditions in the first and third postures, and enabling effective comparison of interference information detected in the third posture with that detected in the first posture.

[0069] Step S63, control the first fork shaft 11 to rotate to the third preset time length, detect the third interference information of the double transmission shaft 10, and verify it with the detection result under the first posture, so as to fully grasp the interference situation of the double transmission shaft 10 under different postures and rotation times, and finally determine whether there is an interference problem of the double transmission shaft 10 under different postures, providing sufficient basis for improving the reliability of the double transmission shaft 10 when it is put on the market.

[0070] Furthermore, the third preset duration is shorter than the first preset duration. This reduces overall detection time and improves detection efficiency while ensuring that effective interference information can be obtained. Furthermore, because the third posture is formed by rotating the first posture by 90°, the shorter detection duration effectively compares the detection results of the first posture, thereby reducing detection costs while ensuring comprehensive detection.

[0071] In other embodiments, the third preset time length is less than the second preset time length, and the shaft head 142 connected to the first fork shaft 11 and the second fork shaft 13 is more likely to interfere at the extreme position than the shaft head 142 connected to the middle fork unit 12. Therefore, when the former passes the inspection, even if there is an initial positioning error on the blank surface, a certain reference can be obtained from the first two inspections, thereby further shortening the inspection time and improving the inspection efficiency.

[0072] Furthermore, the method for measuring the double transmission shaft 10 further includes step S70, which includes step S71, step S72, and step S73. Steps S40, S10, S20, S30, S60, and S70 are described in detail below:

[0073] Since the outer surfaces of the first fork shaft 11, the middle fork unit 12 and the second fork shaft 13 are all blank surfaces, the test results of different postures may be different due to the influence of the blank surfaces during the testing process. Therefore, it is necessary to test the dual transmission shaft 10 in the fourth posture.

[0074] In step S71, based on the completion of the third interference information detection, the duplex transmission shaft 10 is adjusted to a fourth posture. The first fork shaft 11, the middle fork unit 12, and the second fork shaft 13 are each rotated 180° about their respective axes to switch from the third posture to the fourth posture. This allows the duplex transmission shaft 10 to be tested from different angles, thereby more comprehensively reflecting the interference conditions of the duplex transmission shaft 10 in different postures and improving the integrity of the test.

[0075] In step S72, based on the dual transmission shaft 10 being in the fourth posture, the middle fork unit 12 is adjusted so that the projections of the first fork axis 11 and the middle fork unit 12 on the reference plane form a second predetermined angle α2, and the projections of the second fork axis 13 and the middle fork unit 12 on the reference plane form a third predetermined angle α3. This maintains the same angular relationship as in the first posture, ensuring consistency in detection conditions in the first and third postures, and enabling effective comparison of interference information detected in the third posture with that detected in the first posture.

[0076] Step S73, control the first fork shaft 11 to rotate to the fourth preset time length, detect the fourth interference information of the double transmission shaft 10, and verify it with the detection result under the first posture, so as to fully grasp the interference situation of the double transmission shaft 10 under different postures and rotation times, and finally determine whether there is an interference problem of the double transmission shaft 10 under different postures, providing sufficient basis for improving the reliability of the double transmission shaft 10 when it is put on the market.

[0077] Furthermore, the fourth preset duration is shorter than the third preset duration. While ensuring that effective interference information can be obtained in the fourth posture, the overall detection time can be further shortened, improving detection efficiency. Because the fourth posture is formed by rotating the third posture 180 degrees, the two have a certain degree of symmetry, and the shorter detection duration can effectively compare with the detection results of the third posture, thereby ensuring comprehensive detection coverage while reducing energy consumption and time costs during the detection process.

[0078] Example 2:

[0079] In this embodiment, if Figure 2 、 Figure 3 、 Figure 4 As shown, the measuring device includes a fixing assembly 20 , a middle supporting assembly 30 , and a swinging assembly 40 .

[0080] The fixed assembly 20 includes a fixed base 21, a first bracket 22, and a first drive unit 23. The fixed base 21 is fixed in position, and the first bracket 22 is connected to the fixed base 21. The first bracket 22 is used to support the first fork shaft 11. The fixed base 21 provides stable support for the first bracket 22 and the first drive unit 23, thereby ensuring that the first fork shaft 11 is firmly supported and preventing the first fork shaft 11 from shaking during rotation. The first drive unit 23 is used to drive the first fork shaft 11 to rotate about its own axis, simulating the actual working rotation state of the first fork shaft 11 and providing power conditions for subsequent detection of interference information.

[0081] The middle support assembly 30 includes a middle support base 31 and a second bracket 32. The position of the middle support base 31 is adjustable, making it easy to change the position of the middle fork unit 12 according to the initial positioning and posture adjustment requirements, meeting the adjustment requirements of the second preset angle α2 and the third preset angle α3. The second bracket 32 ​​is connected to the middle support base 31 by rotation around the vertical axis; the second bracket 32 ​​is used to support the middle fork unit 12, allowing the middle fork unit 12 to flexibly rotate to adjust the angular relationship between it and the first fork axis 11 and the second fork axis 13. Through this structure, the second preset angle α2 and the third preset angle α3 can be accurately adjusted, thereby ensuring that the angle parameters meet the detection requirements.

[0082] The swing assembly 40 includes a swing base 41, a third bracket 42, and a second drive unit 43. The third bracket 42 is connected to the swing base 41 and is used to support the second fork shaft 13. The second drive unit 43 drives the swing base 41 to swing about a vertical axis. The connection between the third bracket 42 and the swing base 41 stably supports the second fork shaft 13, ensuring that the second fork shaft 13 remains in a stable position during the measurement process. The second drive unit 43 drives the swing base 41 to swing about the vertical axis, which in turn drives the second fork shaft 13 to swing accordingly. This, in conjunction with the position adjustment of the middle fork unit 12, adjusts the angle between the first fork shaft 11 and the second fork shaft 13, thereby improving the accuracy of the measurement process.

[0083] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present disclosure, and that in actual applications, various changes may be made thereto in form and detail without departing from the scope of the present disclosure.

Claims

1. A method for measuring a double transmission shaft, characterized in that: The double transmission shaft measurement method comprises: Initially positioning the double-jointed transmission shaft so that the projections of the first fork shaft and the second fork shaft on the reference plane form a first preset angle; wherein the double-jointed transmission shaft includes the first fork shaft, a middle fork unit, the second fork shaft, and two universal joints; the first fork shaft is connected to the middle fork unit via one of the universal joints, and the second fork shaft is connected to the middle fork unit via the other universal joint; when the initial positioning is completed, the first fork shaft and the second fork shaft are both parallel to the reference plane; Based on the completion of the initial positioning, adjusting the position of the middle fork unit so that the first fork axis and the projection of the middle fork unit on the reference plane form a second preset angle, and the second fork axis and the projection of the middle fork unit on the reference plane form a third preset angle; wherein the sum of the first preset angle, the second preset angle, and the third preset angle is 180°; The first fork shaft is controlled to rotate to a first preset time length, and first interference information of the dual transmission shaft is detected.

2. A double transmission shaft measurement method according to claim 1, characterized in that: The universal joint includes a cross shaft; the cross shaft includes an integrally formed shaft body and four shaft heads; the four shaft heads are arranged in a cross; the first fork shaft is rotatably connected to the corresponding two shaft heads; the second fork shaft is rotatably connected to the corresponding two shaft heads; one end of the middle fork unit is rotatably connected to the corresponding two shaft heads, and the other end of the middle fork unit is rotatably connected to the corresponding two shaft heads; Before initially positioning the duplex transmission shaft, the duplex transmission shaft measurement method further includes: The dual transmission shaft is placed in a first posture so that two of the shaft heads in each of the cross shafts are parallel to the reference plane.

3. A double transmission shaft measurement method according to claim 2, characterized in that: The first posture includes that the two shaft heads connected by the first fork shaft are parallel to the reference plane, and the two shaft heads connected by the second fork shaft are parallel to the reference plane.

4. A double transmission shaft measurement method according to claim 3, characterized in that: The outer surfaces of the first fork shaft, the middle fork unit and the second fork shaft are all blank surfaces; The double transmission shaft measurement method further includes: Based on the completion of the first interference information detection, the double transmission shaft is adjusted to a second posture; the first fork shaft, the middle fork unit, and the second fork shaft are each rotated 180 degrees around their own axes to switch from the first posture to the second posture; Based on the dual transmission shaft being in the second posture, adjusting the middle fork unit so that the first fork axis and the projection of the middle fork unit on the reference plane form a second preset angle, and the second fork axis and the projection of the middle fork unit on the reference plane form a third preset angle; The first fork shaft is controlled to rotate to a second preset time length, and second interference information of the dual transmission shaft is detected.

5. A double transmission shaft measurement method according to claim 4, characterized in that: The second preset time length is shorter than the first preset time length.

6. A double transmission shaft measurement method according to claim 3, characterized in that: The outer surfaces of the first fork shaft, the middle fork unit and the second fork shaft are all blank surfaces; The double transmission shaft measurement method further includes: Based on the completion of the first interference information detection, the double transmission shaft is adjusted to a third posture; the first fork shaft, the middle fork unit, and the second fork shaft are each rotated 90 degrees around their own axes to switch from the first posture to the third posture; Based on the dual transmission shaft being in the third posture, adjusting the middle fork unit so that the first fork axis and the projection of the middle fork unit on the reference plane form the second preset angle, and the second fork axis and the projection of the middle fork unit on the reference plane form the third preset angle; The first fork shaft is controlled to rotate to a third preset time length, and third interference information of the dual transmission shaft is detected.

7. A double transmission shaft measurement method according to claim 6, characterized in that: The third preset duration is shorter than the first preset duration.

8. The method for measuring a double transmission shaft according to claim 6, characterized in that: Based on the completion of the third interference information detection, the dual transmission shaft is adjusted to a fourth posture; the first fork shaft, the middle fork unit, and the second fork shaft are each rotated 180 degrees around their own axes to switch from the third posture to the fourth posture; Based on the dual transmission shaft being in the fourth posture, adjusting the middle fork unit so that the first fork axis and the projection of the middle fork unit on the reference plane form the second preset angle, and the second fork axis and the projection of the middle fork unit on the reference plane form the third preset angle; The first fork shaft is controlled to rotate to a fourth preset time length, and fourth interference information of the dual transmission shaft is detected.

9. A double transmission shaft measurement method according to claim 8, characterized in that: The fourth preset time length is shorter than the third preset time length.

10. A measuring device, applied to the double transmission shaft measuring method according to any one of claims 1 to 9, characterized in that: The measuring device comprises: A fixing assembly, the fixing assembly comprising a fixing base, a first bracket and a first driving unit; the fixing base is fixed in position; the first bracket is connected to the fixing base; the first bracket is used to support the first fork shaft; the first driving unit is used to drive the first fork shaft to rotate around its own axis; A middle support assembly, comprising a middle support seat and a second bracket; the position of the middle support seat is adjustable; the second bracket is rotatably connected to the middle support seat around a vertical axis; the second bracket is used to support the middle fork unit; The swing assembly includes a swing base, a third bracket and a second driving part; the third bracket is connected to the swing base; the third bracket is used to support the second fork shaft; the second driving part drives the swing base to swing around the vertical axis.

Images