Swing arm rotation detection method and system

Abstract

The invention relates to the field of vehicle swing arms, in particular to a swing arm rotation detection method and system. The method comprises the steps that the swing arm is carried to the movable seat assembly to reach the initial state based on swing arm rotation detection instruction triggering. The driving assembly clamps one end of the swing rod unit of the swing arm. The synchronization assembly abuts against the outer circumferential wall of the swing rod unit. The driving assembly drives the swing rod unit to rotate around the central axis of the swing rod unit to obtain first rotation data. The swing rod unit rotates to drive the synchronous assembly to rotate to obtain second rotation data. And obtaining a swing arm rotation detection result based on the first rotation data and the second rotation data. In this way, the problem that the clamping force of the driving assembly is difficult to control in the swing arm rotation detection process is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicle swing arm, in particular to a swing arm rotation detection method and system. BACKGROUND

[0002] The swing arm comprises a swing rod unit and a connecting arm unit. The connecting arm unit is sleeved on one end of the swing rod unit, and the connecting arm unit can rotate relative to the swing rod unit. The steering knuckle, the swing rod unit, the connecting arm unit and the vehicle body are connected in sequence. When the vehicle needs to turn, the steering knuckle and the swing rod unit rotate relative to the connecting arm unit. In order to ensure that the vehicle can turn and support, the swing rod unit and the connecting arm unit need to consider relative rotation and limiting after installation. After the swing arm is assembled, the torque of the relative rotation of the connecting arm unit and the swing rod unit needs to be tested. If the torque of the relative rotation of the connecting arm unit and the swing rod unit driven by the driving assembly is too small, it is judged that the connecting strength of the connecting arm unit and the swing rod unit is insufficient.

[0003] At present, the outer circumferential surface of the swing rod unit is usually clamped by the driving assembly, and then the swing rod unit is driven to rotate around its own axis. If the clamping force of the driving assembly is too small, the swing rod unit cannot be driven to rotate; if the clamping force of the driving assembly is too large, the part where the outer circumferential surface of the swing rod unit cooperates with the steering knuckle will be damaged. SUMMARY

[0004] In order to solve the problem that the clamping force of the driving assembly is difficult to control in the swing arm rotation detection process, the present application provides a swing arm rotation detection method and system.

[0005] In a first aspect, the present application provides a swing arm rotation detection method, which comprises: Based on the swing arm rotation detection instruction trigger, the swing arm is carried to the movable seat assembly to reach an initial state; wherein the initial state comprises positioning and clamping the swing arm on the movable seat assembly; The driving assembly clamps one end of the swing rod unit of the swing arm; The synchronous assembly abuts against the outer circumferential wall of the swing rod unit; The driving assembly drives the swing rod unit to rotate around the central axis of the swing rod unit, and obtains first rotation data; The swing rod unit rotates to drive the synchronous assembly to rotate, and obtains second rotation data; Based on the first rotation data and the second rotation data, the swing arm rotation detection result is obtained.

[0006] In some embodiments, the swing arm comprises a swing rod unit, a connecting arm unit; the swing rod unit comprises a swing rod body, a swing ball; the swing rod body is connected with the swing ball; the connecting arm unit comprises a connecting arm seat, a riveting ring; the connecting arm seat is provided as a shell with one end open; the riveting ring is connected with the connecting arm seat; the riveting ring is arranged at the open end of the connecting arm seat; the swing ball is arranged in the surrounding space of the connecting arm seat and the riveting ring; the swing rod body passes through the surrounding space of the inner wall of the riveting ring; The drive assembly clamps one end of the swing rod unit of the swing arm, comprising: The movable seat assembly adjusts the swing arm to a first set state; wherein the first set state comprises that the swing rod body swings relative to the riveting ring, so that the set protruding position of the riveting ring and the minimum distance of the swing rod body in the radial direction of the swing rod body are less than or equal to the first set distance; the set protruding position comprises the position where the axial one end of the riveting ring and the drive assembly have the minimum distance in the axial direction of the riveting ring; The drive assembly clamps the outer circumferential side of the swing rod body.

[0007] In some embodiments, the drive assembly comprises a clamping unit, a ring probe; the clamping unit is in sliding connection with the ring probe; The movable seat assembly adjusts the swing arm to a first set state, comprising: The movable seat assembly adjusts the swing arm to a second set state; wherein the second set state comprises that the axial direction of the riveting ring of the swing arm is arranged in parallel with the axial direction of the ring probe of the drive assembly; The ring probe moves to abut against the axial one end of the riveting ring; The ring probe rotates by a first set angle around the central axis of the riveting ring to obtain the set protruding position; wherein the first set angle is greater than or equal to 360°; the set protruding position comprises the position where the axial one end of the riveting ring and the clamping unit have the minimum distance in the axial direction of the riveting ring; The clamping unit of the drive assembly clamps one end of the swing rod unit of the swing arm; The movable seat assembly moves the set protruding position of the riveting ring to the first set state in the direction close to the swing rod body of the swing rod unit.

[0008] In some embodiments, the swing arm further comprises a ball seat unit; the ball seat unit comprises a ball seat body, a second oil storage cavity; the ball seat body is provided as a shell with one end open; the second oil storage cavity is recessed from the open bottom end of the ball seat body to the direction away from the ball seat body; the ball seat body is arranged in the surrounding space of the connecting arm seat and the riveting ring; the outer circumferential surface of the ball seat body is connected with the inner wall of the connecting arm seat; the inner wall of the ball seat body is in sliding connection with the swing ball; The swing rod unit further comprises an avoiding portion; the avoiding portion is recessed from an end of the swing ball away from the swing rod body towards the swing rod body; The first set state further comprises that at least part of the avoiding portion is arranged in the surrounding space of the inner circumferential wall of the ball seat body.

[0009] In some embodiments, the adjusting the swing arm to the second set state by the movable seat assembly comprises: The clamping unit clamps the outer circumferential surface of the swing rod body; The clamping unit drives the swing rod body to rotate around the axis line thereof; Based on the clamping unit driving the swing rod body to rotate around the axis line thereof by a second set angle, the movable seat assembly adjusts the swing arm to the second set state.

[0010] In some embodiments, the ball seat unit further comprises a plurality of first oil storage cavities; the first oil storage cavities are arranged from the outer circumferential surface of the ball seat body to the inner circumferential surface of the ball seat body; the plurality of first oil storage cavities are arranged in sequence and spaced apart around the central axis of the ball seat body; The second set angle is greater than any third set angle; wherein the third set angle is the smallest included angle of the axial projection of the connecting line of any two adjacent first oil storage cavities and the central axis of the ball seat body.

[0011] In some embodiments, the first rotation data comprises a starting minimum torque and a rotating minimum torque; wherein the starting minimum torque is the minimum torque of the driving assembly driving the swing rod unit from static to the swing rod unit rotating simultaneously with the synchronous assembly; The rotating minimum torque is the minimum torque of the driving assembly driving the swing rod unit to rotate simultaneously with the synchronous assembly by a fourth set angle to a fifth set angle; wherein the fourth set angle is greater than 0° and less than the fifth set angle; the fifth set angle is greater than 360°.

[0012] In a second aspect, the present application provides a swing arm rotation detection system, which is applied to the swing arm rotation detection method in any of the first aspect, and the swing arm rotation detection system comprises: A swing arm comprises a swing rod unit and a connecting arm unit; one end of the swing rod unit is slidably connected with the connecting arm unit, and the other end extends away from the connecting arm unit; A movable seat assembly is used for fixing the connecting arm unit; A synchronous assembly is used for detecting whether the swing rod unit rotates; A driving assembly is used for driving the swing rod unit to rotate around the axis line thereof; The detection state of the swing arm rotation detection system includes: the movable seat assembly fixes the connecting arm unit, the driving assembly drives the swing rod unit to rotate and obtains first rotation data, and the synchronous assembly abuts against the outer peripheral wall of the swing rod unit and obtains second rotation data.

[0013] In some embodiments, the swing rod unit includes a swing rod body and a swing ball; the swing rod body is connected with the swing ball; the connecting arm unit includes a connecting arm seat and a riveting ring; the connecting arm seat is provided as a shell with an open end; the riveting ring is connected with the connecting arm seat; the riveting ring is arranged at the open end of the connecting arm seat; the swing ball is arranged in the surrounding space of the connecting arm seat and the riveting ring; the swing rod body passes through the surrounding space of the inner peripheral wall of the riveting ring; The movable seat assembly includes a movable seat unit and a swing bias unit; the swing bias unit is drivingly connected with the movable seat unit; the movable seat unit is used for fixing the connecting arm seat; The driving assembly includes a clamping unit and a ring probe; the clamping unit is slidingly connected with the ring probe; the clamping unit is used for driving the swing rod body to rotate around its own axis; and the ring probe is used for detecting the riveting ring; The adjustment state of the swing arm rotation detection system includes: the movable seat unit fixes the connecting arm unit, the ring probe abuts against one end of the riveting ring in the axial direction, rotates around the central axis of the riveting ring by a first set angle and obtains a set protruding position, and then the swing bias unit adjusts the swing arm to a first set state through the movable seat unit; wherein the first set state includes that the minimum distance between the set protruding position of the riveting ring and the swing rod body in the radial direction of the swing rod body is less than or equal to a first set distance, the set protruding position includes the position where the distance between one end of the riveting ring in the axial direction and the clamping unit along the axial direction of the riveting ring is the smallest, and the first set angle is greater than or equal to 360°.

[0014] In some embodiments, the swing arm further includes a ball seat unit; the ball seat unit includes a ball seat body and a second oil storage cavity; the ball seat body is provided as a shell with an open end; the second oil storage cavity is recessed from the open bottom end of the ball seat body away from the opening direction of the ball seat body; the ball seat body is arranged in the surrounding space of the connecting arm seat and the riveting ring; the outer peripheral surface of the ball seat body is connected with the inner peripheral wall of the connecting arm seat; and the inner peripheral wall of the ball seat body is slidingly connected with the swing ball. The swing rod unit further includes an avoiding part; the avoiding part is recessed from one end of the swing ball away from the swing rod body towards the direction close to the swing rod body; The first set state further includes that at least part of the avoiding part is arranged in the surrounding space of the inner peripheral wall of the ball seat body.

[0015] To solve the problem that the clamping force of the driving assembly is difficult to control in the swing arm rotation detection process, the present application has the following advantages: Based on the swing arm rotation detection instruction trigger, the swing arm is carried to the movable seat assembly to reach the initial state including positioning and clamping, the relative position of the swing arm and the movable seat assembly can be fixed, so that the stability of the swing arm is maintained during the swing arm rotation detection process, and a stable foundation is provided for subsequent detection; one end of the swing arm lever unit clamped by the driving assembly abuts against the outer peripheral wall of the swing arm lever unit, so that the synchronous assembly can rotate with the swing arm lever unit, and then the state of the synchronous assembly can be used to judge whether the swing arm lever unit is effectively driven; the driving assembly drives the swing arm lever unit to rotate around the center axis of the driving assembly to obtain first rotation data including the rotation speed of the driving assembly and the output driving torque, the swing arm lever unit rotates to drive the synchronous assembly to rotate to obtain second rotation data including the rotation speed of the synchronous assembly, and the swing arm rotation detection result is obtained based on the first rotation data and the second rotation data, the effectiveness of the first rotation data can be judged, so that the clamping force of the driving assembly on the swing arm lever unit is adjusted, and finally the problems that the clamping force of the driving assembly is too small to drive the swing arm lever unit or too large to damage the swing arm lever unit are solved, and accurate swing arm rotation detection results are efficiently obtained under the premise of avoiding damage to the swing arm lever unit. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A swing arm rotation detection method schematic diagram of an embodiment is shown; Figure 2 A first perspective view schematic diagram of a swing arm rotation detection system of an embodiment is shown; Figure 3 A second perspective view schematic diagram of a swing arm rotation detection system of an embodiment is shown; Figure 4 A partial enlarged schematic diagram of Figure 3 is shown; Figure 5 A swing arm schematic diagram of a swing arm rotation detection system of an embodiment is shown; Figure 6 A swing arm cross-sectional schematic diagram of a swing arm rotation detection system of an embodiment is shown; Figure 7 A ball seat unit schematic diagram of a swing arm rotation detection system of an embodiment is shown; Figure 8 A ball seat unit cross-sectional schematic diagram of a swing arm rotation detection system of an embodiment is shown.

[0017] 10 movable seat assembly; 11 movable seat unit; 111 movable seat body; 112 first positioning part; 113 second positioning part; 114 third positioning part; 12 yawing unit; 121 first driving part; 122 second driving part; 123 third driving part; 20 ring pressing assembly; 21 pressing ring; 22 fourth driving part; 30 synchronizing assembly; 31 detector; 32 synchronizing wheel; 33 synchronizing belt; 40 driving assembly; 41 driving unit; 411 vertical moving part; 412 rotating part; 42 clamping unit; 421 clamping seat; 422 clamping head; 43 ring measuring head; 50 swing arm; 51 ball seat unit; 511 ball seat body; 512 first oil storage cavity; 513 second oil storage cavity; 52 swing lever unit; 521 swing lever body; 522 swing ball; 523 avoiding part; 53 connecting arm unit; 531 connecting arm seat; 532 riveted ring; 533 first connecting arm; 534 second connecting arm. DETAILED DESCRIPTION

[0018] The present disclosure will now be discussed with reference to several example embodiments. It should be appreciated that these embodiments are discussed only to better illustrate the present disclosure and are not intended to limit the scope of the present disclosure in any way.

[0019] As used herein, the terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Further, unless expressly stated to the contrary, "or" refers to an inclusive or and not to an exclusive or. For example, a condition A or B is satisfied by any one of the following: A is true (or A can be satisfied); B is true (or B can be satisfied); or both A and B are true (or both A and B can be satisfied). Also, unless expressly stated to the contrary, "comprising" or "comprises" does not exclude the presence of additional elements. Also, as used herein, the term "or" is intended to mean an inclusive or and not an exclusive or. That is, unless specified otherwise, or clear from the context, the phrase "X employs A or B" is intended to mean any of the natural inclusive permutations. That is, the phrase "X employs A or B" is satisfied by any of the following instances: X employs A; X employs B; or X employs both A and B. In addition, the articles "a," "an," and "the" as used in this application and the appended claims should not be construed to mean "one and only one," unless specified otherwise or clear from the context to be so limited. Also, the use of "about" is intended to mean approximately, nearly, or almost. The term "coupled" as used herein is intended to mean the direct or indirect coupling between elements, unless otherwise indicated. That is, unless specified otherwise, coupled is intended to mean that two elements interacting where one is directly or indirectly related to the other. It is further noted that the claims can be drafted to exclude any element or steps not specifically recited in the claims. As such, this application should not be construed as limited to the expressly recited examples that illustrate specific examples. Many modifications and variations will be apparent to those of ordinary skill in the art once the benefits of the present application are known. Accordingly, it is intended that the application embrace all such modifications and variations as fall within the scope of the appended claims. Furthermore, to those skilled in the art will appreciate that the function performed by the various programming components and steps described herein, as well as the structural components if any, can be implemented by one or more computer applications or services, which instruct or tell other program components or devices to perform steps or carry out functions described herein. In other words, it will be appreciated that the various programming components and steps described herein, as well as the structural components if any, can be implemented by one or more computer applications or services, which instruct or tell other program components or devices to perform steps or carry out functions described herein. In other words, one or more computer applications or services can be programmed to operate or instruct other program components or devices to perform steps or carry out functions described herein. Other functions, steps, components and / or procedures can be possible. It will be appreciated that all of these functions, steps, components and procedures need not be performed. The computer program components or services, if any, can be updated from time to time. Accordingly, the specification and drawings are to be regarded in an illustrative rather than a restrictive sense.

[0020] The swing arm 50 rotation detection system applied to the swing arm 50 rotation detection method comprises a swing arm 50, a movable seat assembly 10, a synchronization assembly 30, and a driving assembly 40. The swing arm 50 comprises a swing rod unit 52 and a connecting arm unit 53. One end of the swing rod unit 52 is in sliding connection with the connecting arm unit 53, and the other end extends away from the connecting arm unit 53. The movable seat assembly 10 is used to fix the connecting arm unit 53. The synchronization assembly 30 is used to detect whether the swing rod unit 52 rotates. The driving assembly 40 is used to drive the swing rod unit 52 to rotate around its own axis.

[0021] During the rotation detection of the swing arm 50, the swing rod unit 52 of the swing arm 50 needs to be driven to rotate around its central axis by the drive assembly 40 to obtain relevant detection data. This process presents significant technical challenges. Currently, the common detection method involves only clamping the outer circumferential surface of the swing rod unit 52 by the drive assembly 40 before driving the swing rod unit 52 to rotate. Since the rotation of the swing rod unit 52 depends on the clamping and driving force transmission of the drive assembly 40, the clamping force of the drive assembly 40 directly affects the feasibility of the detection process and the integrity of the swing rod unit 52. If the clamping force of the drive assembly 40 is set too low, the resulting friction is insufficient to drive the swing rod unit 52 to rotate synchronously, resulting in ineffective driving of the swing rod unit 52 and affecting the normal operation of the detection work. If the clamping force is set too high to ensure driving effect, the excessive clamping force will act on the outer circumferential wall of the swing rod unit 52, easily damaging the outer circumferential surface of the swing rod unit 52 and affecting its subsequent performance.

[0022] Example 1: This example discloses a method for detecting the rotation of a 50-degree swing arm, such as... Figure 1 As shown, the method for detecting the rotation of the swing arm 50 includes steps S10 to S60, and each step is described in detail below: Step S10: Based on the rotation detection command of the swing arm 50, the swing arm 50 is moved onto the movable seat assembly 10 to reach the initial state, which can fix the relative position of the swing arm 50 and the movable seat assembly 10, thereby maintaining the stability of the swing arm 50 during the rotation detection process; wherein, the initial state includes the swing arm 50 being positioned and clamped on the movable seat assembly 10. In step S20, the drive assembly 40 clamps one end of the swing arm unit 52 of the swing arm 50; In step S30, the synchronization component 30 abuts against the outer peripheral wall of the rocker arm unit 52. When the rocker arm unit 52 rotates around its own axis, the rocker arm unit 52 can drive the synchronization component 30 to rotate, thereby determining whether the rocker arm unit 52 is effectively driven by the drive component 40 based on the rotation speed of the synchronization component 30. In step S40, the drive assembly 40 drives the swing arm unit 52 to rotate around the central axis of the swing arm unit 52, and obtains the first rotation data. The first rotation data may be the rotation speed of the drive assembly 40 around its own central axis and the driving torque output by the drive assembly 40. In step S50, the rocker arm unit 52 rotates, causing the synchronization component 30 to rotate, and the second rotation data is obtained. The second rotation data can be the rotational speed of the synchronization component 30. Step S60, based on the first rotation data, the second rotation data, the swing arm 50 rotation detection result is obtained. When the ratio of the rotation speed of the driving assembly 40 around its center axis of the first rotation data to the rotation speed of the synchronous assembly 30 of the second rotation data is a preset ratio or equal, it can be judged that the first rotation data is effective, and the swing arm 50 rotation detection result is obtained according to the first rotation data. This way can efficiently obtain whether the swing rod unit 52 is effectively driven by the driving assembly 40 through the synchronous assembly 30, so as to adjust the clamping force of the driving assembly 40 on the swing rod unit 52, and further efficiently obtain the swing arm 50 rotation detection result under the premise of avoiding damage to the swing rod unit 52. When the driving torque output by the driving assembly 40 is within the set qualified range, it is considered that the swing arm 50 rotation detection is qualified.

[0023] Further, as shown in Figure 5 、 Figure 6 , the swing arm 50 includes a swing rod unit 52 and a connecting arm unit 53; the swing rod unit 52 includes a swing rod body 521 and a swing ball 522; the swing rod body 521 is connected with the swing ball 522; the connecting arm unit 53 includes a connecting arm seat 531 and a riveting ring 532; the connecting arm seat 531 is provided as a shell with one end open; the riveting ring 532 is connected with the connecting arm seat 531; the riveting ring 532 is arranged at the open end of the connecting arm seat 531; the swing ball 522 is arranged in the surrounding space of the connecting arm seat 531 and the riveting ring 532, and the riveting ring 532 can prevent the swing ball 522 and the surrounding space of the connecting arm seat 531 from separating from each other, so that the swing ball 522 only rotates in the surrounding space of the connecting arm seat 531 and the riveting ring 532; the swing rod body 521 passes through the surrounding space of the inner circumferential wall of the riveting ring 532, and the swing rod body 521 can be used to connect with the steering knuckle of the vehicle; Step S20 includes steps S21-S22, and each step is described in detail as follows: steps S10, S21, S22, S30, S40, S50, and S60 are executed in sequence.

[0024] Step S21, the movable seat assembly 10 adjusts the swing arm 50 to a first set state; wherein the first set state includes swinging the swing rod body 521 relative to the riveting ring 532, so that the set protruding position of the riveting ring 532 and the minimum distance of the swing rod body 521 in the radial direction of the swing rod body 521 are less than or equal to the first set distance, which can be 3mm, 5mm, 7mm; the set protruding position includes the position where the riveting ring 532 is closest to the driving assembly 40 along the axial direction of the driving assembly 40, i.e., as shown in Figure 2 , the position where the riveting ring 532 is closest to the driving assembly 40 in the up-down direction; Step S22, the driving assembly 40 clamps the outer circumferential side of the swing lever body 521. In order to ensure the stability of the connection between the swing lever unit 52 and the ball seat unit 51, it is usually necessary to detect whether the minimum resistance of the relative rotation between the swing lever unit 52 and the ball seat unit 51 is within the set qualified range through the driving torque output by the driving assembly 40. The force between the set protruding position of the riveting ring 532 and the swing ball 522 is small, and the resistance of the swing ball 522 to the set protruding position during rotation is small. After adjusting the swing arm 50 to the first set state, the swing ball 522 moves away from the set protruding position, thereby further reducing the force between the set protruding position of the riveting ring 532 and the swing ball 522. At this time, the driving assembly 40 drives the swing lever unit 52 to rotate around its own axis, and more accurate first rotation data can be measured, that is, the minimum driving torque output by the driving assembly 40 for driving the swing lever unit 52 to rotate and the rotation speed of the driving assembly 40 around its central axis.

[0025] Further, as shown in Figure 2 、 Figure 3 、 Figure 5 , the driving assembly 40 includes a clamping unit 42 and a ring measuring head 43; the clamping unit 42 and the ring measuring head 43 are slidably connected; Step S21 includes steps S211-S215, which are described in detail as follows: steps S10, S211, S212, S213, S214, S215, S22, S30, S40, S50, and S60 are executed in sequence.

[0026] Step S211, the movable seat assembly 10 adjusts the swing arm 50 to a second set state; wherein the second set state includes that the axial direction of the riveting ring 532 of the swing arm 50 is arranged in parallel with the axial direction of the ring measuring head 43 of the driving assembly 40, and the riveting ring 532 is adjusted to be flat, thereby facilitating the subsequent steps; Step S212, the ring measuring head 43 moves to abut one end of the axial direction of the riveting ring 532; Step S213, the ring measuring head 43 rotates around the central axis of the riveting ring 532 by a first set angle to obtain a set protruding position; wherein the first set angle is greater than or equal to 360°; the set protruding position includes the position where the distance between one end of the axial direction of the riveting ring 532 and the clamping unit 42 along the axial direction of the riveting ring 532 is the smallest, and the set protruding position can be obtained according to the position where the ring measuring head 43 abuts against the riveting ring 532 when the ring measuring head 43 moves the maximum distance away from the riveting ring 532 (i.e. the upward direction as shown in Figure 2 ).

[0027] Step S214, the clamping unit 42 of the driving assembly 40 clamps one end of the swing rod unit 52 of the swing arm 50; Step S215, the movable seat assembly 10 moves the set protruding position of the riveting ring 532 to the first set state in the direction close to the swing rod body 521 of the swing rod unit 52, further reduces the acting force between the set protruding position of the riveting ring 532 and the swing ball 522, at this time, the driving assembly 40 drives the swing rod unit 52 to rotate around its own axis, and more accurate first rotation data can be measured, that is, the minimum driving torque output by the driving assembly 40 for driving the swing rod unit 52 to rotate and the rotation speed of the driving assembly 40 around its own central axis.

[0028] Further, as shown in Figure 6 、 Figure 8 , the swing arm 50 further comprises a ball seat unit 51; the ball seat unit 51 comprises a ball seat body 511 and a second oil storage cavity 513; the ball seat body 511 is provided as an open-ended shell for placing the swing ball 522; the second oil storage cavity 513 is recessed from the open bottom end of the ball seat body 511 (the bottom end can be the lower end as shown in Figure 8 ) to the direction away from the opening of the ball seat body 511 (that is, the downward direction as shown in Figure 8 ); the ball seat body 511 is arranged in the surrounding space of the connecting arm seat 531 and the riveting ring 532, and the second oil storage cavity 513 can be used to store lubricant, which can reduce the resistance between the swing ball 522 and the ball seat body 511 after being attached to the outer peripheral wall of the swing ball 522 and / or the inner peripheral wall of the ball seat body 511; the outer peripheral surface of the ball seat body 511 is connected with the inner peripheral wall of the connecting arm seat 531, and the hardness of the ball seat body 511 can be weaker than that of the connecting arm seat 531 and the swing ball 522 respectively, so that the ball seat body 511 can reduce the damage of the ball seat body 511 and the swing ball 522 during use after the swing arm 50 is assembled; the inner peripheral wall of the ball seat body 511 is in sliding connection with the swing ball 522; The swing rod unit 52 further comprises an avoiding part 523; the avoiding part 523 is recessed from the end of the swing ball 522 away from the swing rod body 521 to the direction close to the swing rod body 521, so as to provide space for accommodating lubricant; The first set state further comprises that at least part of the avoiding part 523 is arranged in the surrounding space of the inner peripheral wall of the ball seat body 511, so that the contact area between the ball seat body 511 and the swing ball 522 is smaller, the resistance of relative rotation between the ball seat body 511 and the swing ball 522 is reduced, the minimum driving torque output by the driving assembly 40 for driving the swing rod unit 52 to rotate is sufficiently reduced, and more accurate swing arm 50 rotation detection results are obtained.

[0029] Further, the step S211 includes steps S2111-S2113, which are described in detail as follows: steps S10, S2111, S2112, S2113, S212, S213, S214, S215, S22, S30, S40, S50, and S60 are executed in sequence.

[0030] In step S2111, the clamping unit 42 clamps the outer circumferential surface of the swing rod body 521. In step S2112, the clamping unit 42 drives the swing rod body 521 to rotate around its own axis. In step S2113, based on the clamping unit 42 driving the swing rod body 521 to rotate around its own axis by a second set angle, the swing arm 50 is adjusted to a second set state by the movable seat assembly 10. The second set angle is the rotation angle of the clamping unit 42. The process of the clamping unit 42 driving the swing rod body 521 to rotate around its own axis by the second set angle is only a lubrication process. When the clamping unit 42 drives the swing rod body 521, slip may occur, but at this time, it is not a measurement process, and the influence of slight slip can be ignored. A lubricant is arranged between the outer circumferential wall of the swing ball 522 and the inner circumferential wall of the ball seat body 511. Before the swing arm 50 is adjusted to the second set state, driving the swing rod body 521 to rotate around its own axis by the second set angle can make the lubricant as fully coated as possible on the outer circumferential wall of the swing ball 522 and the inner circumferential wall of the ball seat body 511, which can further reduce the resistance between the outer circumferential wall of the swing ball 522 and the inner circumferential wall of the ball seat body 511, thereby reducing the minimum driving torque output by the driving assembly 40 for driving the swing rod unit 52 to rotate, and further obtaining more accurate swing arm 50 rotation detection results.

[0031] Further, as shown in Figure 7 , Figure 8 The ball seat unit 51 further includes a plurality of first oil storage cavities 512. The first oil storage cavities 512 penetrate from the outer circumferential surface of the ball seat body 511 to the inner circumferential surface of the ball seat body 511. The plurality of first oil storage cavities 512 are sequentially and spaced apart around the central axis of the ball seat body 511. The first oil storage cavities 512 can store lubricant to reduce the resistance between the outer circumferential wall of the swing ball 522 and the inner circumferential wall of the ball seat body 511.

[0032] The second set angle is greater than any third set angle; wherein the third set angle is the minimum included angle of the line connecting the centers of the two adjacent first oil storage cavities 512 and the axial projection of the line along the ball seat body 511. After rotating the second set angle, the lubricant of the first oil storage cavity 512 can be fully adhered to the outer peripheral wall of the swing ball 522 and the inner peripheral wall of the ball seat body 511, so that the swing ball 522 and the ball seat body 511 have smaller resistance. This arrangement allows the clamping unit 42 to rotate around the center axis of the swing lever body 521 at the smallest angle under the premise of fully lubricating the swing ball 522 and the ball seat body 511, thereby improving efficiency and reducing energy consumption.

[0033] Further, the first rotation data includes a starting minimum torque and a rotating minimum torque; wherein the starting minimum torque is the minimum torque of the driving assembly 40 driving the swing lever unit 52 from rest to the swing lever unit 52 rotating simultaneously with the synchronous assembly 30, i.e., the minimum torque output by the driving assembly 40 when the outer peripheral surface of the swing ball 522 and the inner peripheral surface of the ball seat body 511 are in static friction with each other; The rotating minimum torque is the minimum torque of the driving assembly 40 driving the swing lever unit 52 and the synchronous assembly 30 to rotate simultaneously within a fourth set angle and a fifth set angle, i.e., the minimum torque output by the driving assembly 40 when the outer peripheral surface of the swing ball 522 and the inner peripheral surface of the ball seat body 511 are in kinetic friction with each other; wherein the fourth set angle is greater than 0° and less than the fifth set angle; and the fifth set angle is greater than 360°. Through the starting minimum torque and the rotating minimum torque, it can be more accurately determined whether the connection of the swing ball 522 and the ball seat body 511 and the connection of the ball seat body 511 and the swing ball 522 are stable enough.

[0034] Embodiment two: In this embodiment, a swing arm 50 rotation detection system is provided, which is applied to the swing arm 50 rotation detection method of any of the above embodiments. As shown in FIGS. 1-3, the swing arm 50 rotation detection system can include a swing arm 50, a movable seat assembly 10, a synchronous assembly 30, and a driving assembly 40. Figure 2 、 Figure 3 、 Figure 4 The swing arm 50 rotation detection system can include a swing arm 50, a movable seat assembly 10, a synchronous assembly 30, and a driving assembly 40.

[0035] The swing arm 50 includes a swing lever unit 52 and a connecting arm unit 53. One end of the swing lever unit 52 is slidably connected to the connecting arm unit 53, and the other end extends away from the connecting arm unit 53. The end of the swing lever unit 52 away from the connecting arm unit 53 can be used to connect a steering knuckle of a vehicle, and the end of the connecting arm unit 53 away from the swing lever unit 52 can be used to connect a vehicle body.

[0036] The movable seat assembly 10 is used to fix the connecting arm unit 53, so as to position and clamp the connecting arm unit 53 during the swing arm 50 rotation detection process.

[0037] The synchronous assembly 30 is used to detect whether the swing rod unit 52 rotates around the central axis of the swing rod unit 52.

[0038] The driving assembly 40 is used to drive the swing rod unit 52 to rotate around the axis of the swing rod unit 52.

[0039] The detection state of the swing arm 50 rotation detection system includes that the movable seat assembly 10 positions and clamps the connecting arm unit 53, the relative position of the fixed connecting arm unit 53 and the movable seat assembly 10, the driving assembly 40 clamps the outer peripheral wall of the swing rod unit 52 to drive the swing rod unit 52 to rotate and obtain first rotation data, and the synchronous assembly 30 needs to abut against the outer peripheral wall of the swing rod unit 52 to obtain second rotation data. The first rotation data can be the rotation speed of the driving assembly 40 around the central axis of the driving assembly 40 and the driving torque output by the driving assembly 40. The second rotation data can be the rotation speed of the synchronous assembly 30. In this way, whether the swing rod unit 52 is effectively driven by the driving assembly 40 can be detected by the synchronous assembly 30, so that the swing arm 50 rotation detection is realized without damaging the swing rod unit 52.

[0040] Further, as shown in Figure 5 , Figure 6 , the swing rod unit 52 includes a swing rod body 521 and a swing ball 522, the swing rod body 521 is connected with the swing ball 522, the connecting arm unit 53 includes a connecting arm seat 531 and a riveting ring 532, the connecting arm seat 531 is arranged as a shell with an open end, facilitating the swing ball 522 to be installed into the surrounding space of the inner peripheral wall of the connecting arm seat 531, the riveting ring 532 is connected with the connecting arm seat 531, the riveting ring 532 is arranged at the open end of the connecting arm seat 531, and the swing ball 522 is arranged in the surrounding space of the connecting arm seat 531 and the riveting ring 532, so that the connecting arm seat 531 and the riveting ring 532 jointly limit the activity range of the swing ball 522, and the swing rod body 521 passes through the surrounding space of the inner peripheral wall of the riveting ring 532, so that the swing rod body 521 is used to connect the steering knuckle of the vehicle.

[0041] As shown in Figure 2 , the movable seat assembly 10 includes a movable seat unit 11 and a deflection unit 12, the deflection unit 12 is drivingly connected with the movable seat unit 11, the movable seat unit 11 can be used to position and clamp the connecting arm seat 531, and the deflection unit 12 can adjust the angle of the central axis of the riveting ring 532 on the movable seat unit 11 through the movable seat unit 11.

[0042] As shown in Figure 4 , the driving assembly 40 includes a clamping unit 42 and a ring measuring head 43, the clamping unit 42 is slidingly connected with the ring measuring head 43, the ring measuring head 43 can move along the axis thereof, the clamping unit 42 is used to drive the swing rod body 521 to rotate around the axis thereof, and the ring measuring head 43 is used to detect the side of the riveting ring 532 close to the clamping unit 42. The adjustment state of the swing arm 50 rotation detection system includes positioning and clamping the connecting arm unit 53 by the movable seat unit 11, fixing the relative position of the movable seat unit 11 and the connecting arm unit 53, abutting the axial one end of the ring probe 43 with the riveted ring 532, rotating the riveted ring 532 around the center axis of the riveted ring 532 by a first set angle and obtaining a set protruding position, and then adjusting the swing arm 50 to a first set state by the movable seat unit 11 of the deflection unit 12; wherein the first set state includes that the minimum distance between the set protruding position of the riveted ring 532 and the swing lever body 521 in the radial direction of the swing lever body 521 is less than or equal to a first set distance, and the set protruding position includes the position where the axial one end of the riveted ring 532 and the clamping unit 42 have the minimum distance in the axial direction of the riveted ring 532, which can be obtained according to the position where the riveted ring 532 abuts the ring probe 43 when the ring probe 43 moves the maximum distance away from the riveted ring 532 during the process of rotating the ring probe 43 around the center axis of the riveted ring 532 by a first set angle, and the first set angle is greater than or equal to 360°. This setting mode can reduce the acting force between the set protruding position of the riveted ring 532 and the swing ball 522, and then the swing lever unit 52 is driven to rotate around its own axis by the driving assembly 40, so that more accurate first rotation data can be measured.

[0043] Further, as shown in Figure 7 、 Figure 8 , the swing arm 50 further includes a ball seat unit 51; the ball seat unit 51 includes a ball seat body 511 and a second oil storage cavity 513; the ball seat body 511 is provided as an open-ended shell; the second oil storage cavity 513 is recessed from the open bottom end of the ball seat body 511 away from the opening direction of the ball seat body 511; the ball seat body 511 is arranged in the surrounding space of the connecting arm seat 531 and the riveted ring 532, and the second oil storage cavity 513 can be used to store lubricant, which can reduce the resistance between the swing ball 522 and the ball seat body 511 after being attached to the outer peripheral wall of the swing ball 522 and / or the inner peripheral wall of the ball seat body 511; the outer peripheral surface of the ball seat body 511 is connected with the inner peripheral wall of the connecting arm seat 531; the hardness of the ball seat body 511 can be weaker than that of the connecting arm seat 531 and the swing ball 522 respectively, and the ball seat body 511 can reduce the damage of the ball seat body 511 and the swing ball 522 during use after the swing arm 50 is assembled; the inner peripheral wall of the ball seat body 511 is in sliding connection with the swing ball 522, which can realize flexible rotation of the knuckle.

[0044] The swing lever unit 52 further includes an avoiding part 523; the avoiding part 523 is recessed from the end of the swing ball 522 away from the swing lever body 521 towards the swing lever body 521, providing space for accommodating lubricant. When the avoiding part 523 moves relative to the ball seat body 511, the avoiding part 523 can also move the lubricant, thereby forming a larger area of lubrication on the inner peripheral surface of the ball seat body 511.

[0045] The first setting state further comprises that the at least partial avoiding part 523 is arranged in the surrounding space of the inner wall of the ball seat body 511, which can make the contact area between the ball seat body 511 and the swing ball 522 smaller, sufficiently reduce the minimum driving torque output by the driving assembly 40 for driving the swing lever unit 52 to rotate, and thus obtain more accurate swing arm 50 rotation detection results.

[0046] Further, as shown in Figure 5 The connecting arm unit 53 can further comprise a first connecting arm 533 and a second connecting arm 534. One end of the first connecting arm 533 is connected with the connecting arm seat 531, and the other end extends away from the connecting arm seat 531. One end of the second connecting arm 534 is connected with the connecting arm seat 531, and the other end extends away from the first connecting arm 533. The first connecting arm 533 and the second connecting arm 534 are respectively arranged apart from the riveted ring 532. After the swing arm 50 is assembled with the vehicle, the connecting arm seat 531 can be respectively slidably connected with the vehicle body through the first connecting arm 533 and the second connecting arm 534. As shown in Figure 3 The movable seat unit 11 comprises a movable seat body 111, a first positioning part 112, a second positioning part 113, and a third positioning part 114. The first positioning part 112, the second positioning part 113, and the third positioning part 114 are respectively connected with the movable seat body 111. The first positioning part 112 is used for positioning and clamping the connecting arm seat 531, the second positioning part 113 is used for positioning and clamping the first connecting arm 533, and the third positioning part 114 is used for positioning and clamping the second connecting arm 534, so as to keep the swing arm 50 stable during the swing arm 50 rotation detection process and improve the accuracy of the detection results. Figure 2 The yawing unit 12 comprises a first driving part 121, a second driving part 122, and a third driving part 123. The first driving part 121, the second driving part 122, and the third driving part 123 can be respectively drivingly connected with the movable seat body 111. The first driving part 121 is arranged adjacent to the first positioning part 112, the second driving part 122 is arranged adjacent to the second positioning part 113, and the third driving part 123 is arranged adjacent to the third positioning part 114, so as to control the positions of the first positioning part 112, the second positioning part 113, and the third positioning part 114 according to a predetermined program during the swing arm 50 rotation detection process, and thus change the position of the central axis of the riveted ring 532. Figure 3 Figure 4 ​As shown, the synchronous assembly 30 comprises a detector 31, a synchronous wheel 32, a synchronous belt 33; part of the synchronous belt 33 can be sleeved on the outer peripheral wall of part of the synchronous wheel 32, and part of the synchronous belt 33 can be sleeved on the outer peripheral wall of part of the detector 31. During the rotation detection of the swing arm 50, the synchronous belt 33 in abutment with the synchronous wheel 32 can be in abutment with the outer peripheral wall of the swing lever body 521; when the driving assembly 40 drives the swing lever body 521 to rotate around its own axis, the swing lever body 521 can drive the synchronous wheel 32 to rotate through the synchronous belt 33, and the synchronous wheel 32 drives the detector 31 to rotate through the synchronous belt 33; the rotation speed of the detector 31 around its own axis can be the second rotation data. The driving assembly 40 further comprises a driving unit 41; the driving unit 41 comprises a vertical moving part 411 and a rotating part 412; the clamping unit 42 comprises a clamping seat 421, a driving part, and a plurality of clamping heads 422. The clamping seat 421 is drivingly connected with the rotating part 412 and the vertical moving part 411 respectively; the clamping seat 421 can move along the central axis of the clamping seat 421 and can also rotate around the central axis of the clamping seat 421. The clamping head 422 is movably connected with the clamping seat 421. The driving part is drivingly connected with the clamping head 422. The clamping head 422 can move towards or away from the central axis of the clamping seat 421. The clamping seat 421 is slidingly connected with the ring probe 43. The clamping head 422 can be sleeved on the outer peripheral side of the swing lever body 521 under the driving of the vertical moving part 411 and the rotating part 412, and then the driving part drives the clamping head 422 to clamp the outer peripheral wall of the swing lever body 521.

[0047] In some other embodiments, the swing arm 50 rotation detection system can further comprise a ring pressing assembly 20; the ring pressing assembly 20 comprises a pressing ring 21 and a fourth driving part 22; the fourth driving part 22 can be connected with the movable seat body 111; the fourth driving part 22 can be drivingly connected with the pressing ring 21. When the movable seat unit 11 positions and clamps the connecting arm unit 53, the fourth driving part 22 can drive the pressing ring 21 to move to abut against the side of the swing lever body 521 away from the movable seat body 111, so that the pressing ring 21 applies a force to the swing lever body 521 towards the movable seat unit 11, so that the movable seat unit 11 and the pressing ring 21 jointly position and clamp the connecting arm unit 53.

[0048] Those skilled in the art can understand that the above-mentioned embodiments are specific cases for implementing the present disclosure, and in actual applications, various changes can be made in form and details without departing from the scope of the present disclosure.

Claims

1. A swing arm rotation detection method characterized by comprising: The swing arm rotation detection method comprises: Based on the swing arm rotation detection instruction trigger, the swing arm is carried to the movable seat assembly to reach the initial state; wherein the initial state includes positioning and clamping the swing arm on the movable seat assembly; The driving assembly clamps one end of the swing rod unit of the swing arm; The synchronous assembly abuts against the outer peripheral wall of the swing rod unit; The driving assembly drives the swing rod unit to rotate around the central axis of the swing rod unit to obtain first rotation data; The swing rod unit rotates to drive the synchronous assembly to rotate to obtain second rotation data; Based on the first rotation data and the second rotation data, the swing arm rotation detection result is obtained.

2. The swing arm rotation detection method according to claim 1, wherein: The swing arm comprises a swing rod unit and a connecting arm unit; the swing rod unit comprises a swing rod body and a swing ball; the swing rod body is connected with the swing ball; the connecting arm unit comprises a connecting arm seat and a riveting ring; the connecting arm seat is provided as a shell with an open end; the riveting ring is connected with the connecting arm seat; the riveting ring is arranged at the open end of the connecting arm seat; the swing ball is arranged in the surrounding space of the connecting arm seat and the riveting ring; the swing rod body passes through the surrounding space of the inner peripheral wall of the riveting ring; The driving assembly clamping one end of the swing rod unit of the swing arm comprises: The movable seat assembly adjusts the swing arm to a first set state; wherein the first set state includes swinging the swing rod body relative to the riveting ring, so that the set protruding position of the riveting ring and the minimum distance of the swing rod body in the radial direction of the swing rod body are less than or equal to a first set distance; the set protruding position includes the position where the distance between the axial end of the riveting ring and the driving assembly along the axial direction of the riveting ring is the smallest; The driving assembly clamps the outer peripheral side of the swing rod body.

3. The swing arm rotation detection method according to claim 2, wherein: The driving assembly comprises a clamping unit and a ring probe; the clamping unit is slidingly connected with the ring probe; The movable seat assembly adjusting the swing arm to the first set state comprises: The movable seat assembly adjusts the swing arm to a second set state; wherein the second set state includes that the axial direction of the riveting ring of the swing arm is arranged in parallel with the axial direction of the ring probe of the driving assembly; The ring probe moves to abut against the axial end of the riveting ring; The ring probe rotates around the central axis of the riveting ring by a first set angle to obtain the set protruding position; wherein the first set angle is greater than or equal to 360°; the set protruding position includes the position where the distance between the axial end of the riveting ring and the clamping unit along the axial direction of the riveting ring is the smallest; The clamping unit of the driving assembly clamps one end of the swing rod unit of the swing arm; The movable seat assembly moves the set protruding position of the riveting ring to the first set state in the direction close to the swing rod body of the swing rod unit.

4. The swing arm rotation detection method according to claim 3, wherein: The swing arm further comprises a ball seat unit; the ball seat unit comprises a ball seat body and a second oil storage cavity; the ball seat body is provided as an open-ended shell; the second oil storage cavity is recessed from the open bottom end of the ball seat body away from the opening direction of the ball seat body; the ball seat body is arranged in the surrounding space of the connecting arm seat and the riveted ring; the outer peripheral surface of the ball seat body is connected with the inner peripheral wall of the connecting arm seat; the inner peripheral wall of the ball seat body is in sliding connection with the swing ball; The swing arm further comprises a ball seat unit; the ball seat unit comprises a ball seat body and a second oil storage cavity; the ball seat body is provided as an open-ended shell; the second oil storage cavity is recessed from the open bottom end of the ball seat body away from the opening direction of the ball seat body; the ball seat body is arranged in the surrounding space of the connecting arm seat and the riveted ring; the outer peripheral surface of the ball seat body is connected with the inner peripheral wall of the connecting arm seat; the inner peripheral wall of the ball seat body is in sliding connection with the swing ball; The first set state further comprises that at least part of the avoiding part is arranged in the surrounding space of the inner peripheral wall of the ball seat body.

5. The swing arm rotation detection method according to claim 4, wherein the adjusting the swing arm to a second set state by the movable seat assembly comprises: The clamping unit clamps the outer peripheral surface of the swing rod body; The clamping unit drives the swing rod body to rotate around its own axis; Based on the clamping unit driving the swing rod body to rotate around its own axis by a second set angle, the movable seat assembly adjusts the swing arm to a second set state.

6. The swing arm rotation detection method according to claim 5, wherein the ball seat unit further comprises a plurality of first oil storage cavities; the first oil storage cavities are through from the outer peripheral surface of the ball seat body to the inner peripheral surface of the ball seat body; the plurality of first oil storage cavities are arranged in sequence and spaced apart around the central axis of the ball seat body; The second set angle is greater than any third set angle; wherein the third set angle is the smallest included angle of the projection of the line connecting any two adjacent first oil storage cavities and the central axis of the ball seat body along the axial direction of the ball seat body.

7. The swing arm rotation detection method according to claim 6, wherein the first rotation data comprises a starting minimum torque and a rotation minimum torque; wherein the starting minimum torque is the minimum torque of the driving assembly driving the swing rod unit from rest to the swing rod unit and the synchronization assembly rotating simultaneously; The rotation minimum torque is the minimum torque of the driving assembly driving the swing rod unit and the synchronization assembly to rotate within a fourth set angle to a fifth set angle; wherein the fourth set angle is greater than 0° and less than the fifth set angle; the fifth set angle is greater than 360°. The swing arm rotation detection system is applied to any one of the swing arm rotation detection methods in claims 1-7, and the swing arm rotation detection system comprises: A swing arm comprising a swing rod unit and a connecting arm unit; one end of the swing rod unit is in sliding connection with the connecting arm unit, and the other end extends away from the connecting arm unit; A movable seat assembly for fixing the connecting arm unit; 8. A swing arm rotation detection system characterized by, A synchronization assembly for detecting whether the swing rod unit rotates; A driving assembly for driving the swing rod unit to rotate around its own axis; ​ ​ ​ The detection state of the swing arm rotation detection system includes: the movable seat assembly fixes the connecting arm unit, the driving assembly drives the swing rod unit to rotate and obtains first rotation data, and the synchronous assembly abuts against the outer peripheral wall of the swing rod unit and obtains second rotation data.

9. The swing arm rotation detection system according to claim 8, wherein, the swing rod unit comprises a swing rod body and a swing ball; the swing rod body is connected with the swing ball; the connecting arm unit comprises a connecting arm seat and a riveting ring; the connecting arm seat is provided as a shell with an open end; the riveting ring is connected with the connecting arm seat; the riveting ring is arranged at the open end of the connecting arm seat; the swing ball is arranged in the surrounding space of the connecting arm seat and the riveting ring; and the swing rod body passes through the surrounding space of the inner peripheral wall of the riveting ring; the movable seat assembly comprises a movable seat unit and a swing bias unit; the swing bias unit is drivingly connected with the movable seat unit; and the movable seat unit is used for fixing the connecting arm seat; the driving assembly comprises a clamping unit and a ring probe; the clamping unit is slidingly connected with the ring probe; and the clamping unit is used for driving the swing rod body to rotate around its own axis; the ring probe is used for detecting the riveting ring; the adjustment state of the swing arm rotation detection system includes: the movable seat unit fixes the connecting arm unit, the ring probe abuts against one end of the riveting ring in the axial direction, rotates around the central axis of the riveting ring by a first set angle to obtain a set protruding position, and then the swing bias unit adjusts the swing arm to a first set state through the movable seat unit; wherein, the first set state includes that the minimum distance between the set protruding position of the riveting ring and the swing rod body in the radial direction of the swing rod body is less than or equal to a first set distance, the set protruding position includes the position where the distance between one end of the riveting ring in the axial direction and the clamping unit along the axial direction of the riveting ring is the smallest, and the first set angle is greater than or equal to 360°.

10. The swing arm rotation detection system according to claim 9, wherein, the swing arm further comprises a ball seat unit; the ball seat unit comprises a ball seat body and a second oil storage cavity; the ball seat body is provided as a shell with an open end; the second oil storage cavity is recessed from the open bottom end of the ball seat body away from the opening direction of the ball seat body; the ball seat body is arranged in the surrounding space of the connecting arm seat and the riveting ring; the outer peripheral surface of the ball seat body is connected with the inner peripheral wall of the connecting arm seat; and the inner peripheral wall of the ball seat body is slidingly connected with the swing ball; the swing rod unit further comprises an avoiding part; the avoiding part is recessed from one end of the swing ball away from the swing rod body towards the swing rod body; the first set state further includes that at least part of the avoiding part is arranged in the surrounding space of the inner peripheral wall of the ball seat body.

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