Rear rocker arm mounting structure, mounting method and vehicle

Abstract

The invention relates to the technical field of bestriding type vehicles, and provides a rear rocker arm mounting structure, a mounting method and a vehicle. The rear rocker arm mounting structure is suitable for mounting a rear rocker arm in a frame and comprises a first mounting part located at one end of the rear rocker arm and a second mounting part located at the other end of the rear rocker arm. The first mounting part comprises a hollow first pivot, a bushing, a first bearing, a nut and a bolt, the first pivot is arranged on the frame in a penetrating manner, one end of the first pivot is connected with the rear rocker arm through the bushing and the first bearing, and the nut and the bolt are connected to the other end of the first pivot. The second installation part comprises a second pivot and a second bearing, the second pivot is connected to the frame, and one end of the second pivot is connected with the rear rocker arm through the second bearing. According to the invention, the arrangement of the transmission shaft in the straddle type vehicle is facilitated, the impact on parts such as bearings at the two ends of the rear rocker arm can be reduced when the vehicle runs, and the overall quality of the straddle type vehicle can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of straddle-type vehicles, in particular to a rear swing arm mounting structure, a mounting method and a vehicle. BACKGROUND

[0002] The straddle-type vehicle, generally a motorcycle, the rear swing arm as one of the important components of the rear part of the straddle-type vehicle, not only plays a role in connecting the rear wheel and the frame, but also can cooperate with the rear shock absorber to reduce the transmission of the rear wheel vibration to the frame, and improve the comfort of vehicle driving.

[0003] In the traditional design, the rear swing arm is generally connected to the frame by a whole pivot shaft penetrating left and right. This mounting form can realize the installation of the rear swing arm, but on the one hand, it is not conducive to the arrangement of the transmission shaft, and on the other hand, it is not conducive to reducing the impact on the bearings and other components at both ends of the rear swing arm, and is not conducive to improving the overall quality of the straddle-type vehicle. SUMMARY

[0004] Therefore, the present application aims to provide a rear swing arm mounting structure to improve the overall quality of the straddle-type vehicle.

[0005] To achieve the above-mentioned purpose, the technical scheme of the present application is as follows:

[0006] A rear swing arm mounting structure is applied to a straddle-type vehicle and is suitable for mounting a rear swing arm in a frame, and comprises a first mounting part at one end of the rear swing arm and a second mounting part at the other end of the rear swing arm.

[0007] The first mounting part comprises a hollow first pivot shaft, a bushing, a first bearing, a nut and a bolt. The first pivot shaft is provided in the frame. The bushing is sleeved on one end of the first pivot shaft extending into the rear swing arm. The first bearing is arranged between the bushing and the rear swing arm. The nut is connected to the other end of the first pivot shaft and fixes the bushing between the first pivot shaft and the frame. The bolt is connected in the first pivot shaft and locks the nut at the end of the first pivot shaft.

[0008] The second mounting part comprises a second pivot shaft and a second bearing. The second pivot shaft is connected to the frame, and one end of the second pivot shaft extends into the rear swing arm. The second bearing is arranged between the second pivot shaft and the rear swing arm, and the second bearing can slide axially relative to the second pivot shaft.

[0009] Further, the first bearing is a deep groove ball bearing; and / or,

[0010] The outer side of the first bearing is provided with a retainer ring and a first sealing ring, the retainer ring is clamped on the rear swing arm, and the first sealing ring is located between the rear swing arm and the bushing.

[0011] Further, the screwing direction between the nut and the first pivot is opposite to the screwing direction between the bolt and the first pivot.

[0012] Further, the first pivot has a first shaft segment and a second shaft segment connected thereto, the first shaft segment is close to one end of the first pivot extending into the rear swing arm, and the second shaft segment is close to one end of the first pivot connected to the nut;

[0013] The inner hole of the bushing has a first hole segment and a second hole segment connected thereto, and the bushing is sleeved on the first pivot from the second hole segment;

[0014] The first hole segment is in clearance fit with the first shaft segment and the second shaft segment, and the second hole segment is in clearance fit with the first shaft segment, and the second hole segment is in interference fit with the second shaft segment.

[0015] Further, the second bearing adopts a cylindrical needle bearing; and / or,

[0016] The second pivot is provided with a weight-reducing hole, and one end of the second pivot extending into the rear swing arm avoids the transmission shaft avoiding hole on the rear swing arm.

[0017] Further, the outer side of the second bearing is provided with a second sealing ring, and the second sealing ring is located between the rear swing arm and the second pivot.

[0018] Compared with the related art, the present application has the following advantages:

[0019] (1) The rear swing arm mounting structure of the present application makes the mounting portions at both ends of the rear swing arm adopt corresponding pivots, so that the pivot for connecting the rear swing arm and the frame is disconnected left and right, which can avoid the inconvenience caused by using a whole pivot for the arrangement of the transmission shaft in the straddle-type vehicle, is helpful for the arrangement of the transmission shaft in the straddle-type vehicle, and also can avoid the assembly stress of the bearings and other components at both ends of the rear swing arm after the rear swing arm is mounted, which is helpful for reducing the impact on the bearings and other components at both ends of the rear swing arm during vehicle driving, can improve the service life of the bearings and other components, and thus is conducive to improving the overall quality of the straddle-type vehicle.

[0020] (2) The first bearing adopts a deep groove ball bearing, which is simple in structure, convenient to use, long in service life, excellent in high-speed performance, and can also utilize the characteristics of the deep groove ball bearing that can bear radial and axial combined load, improve the adaptability of the first bearing to the swing of the rear swing arm, and improve the stability of the installation of the rear swing arm on the frame.

[0021] The retaining ring arranged on the outer side of the first bearing and clamped on the rear swing arm can limit and prevent the first bearing from being disengaged in cooperation with the rear swing arm, so as to ensure the stability of the connection between the first bearing and the rear swing arm. The first sealing ring arranged between the rear swing arm and the bushing on the outer side of the first bearing can achieve the waterproof and dustproof effect of the first bearing, so as to ensure the smoothness and reliability of the first bearing and help to improve the service life of the first bearing.

[0022] (3) The screwing direction between the nut and the first pivot is opposite to the screwing direction between the bolt and the first pivot, so that when the bolt is assembled, the rotation trend of the bolt driving the first pivot is tightening the nut, and the first pivot does not need to be clamped and fixed by a tool, which can facilitate the assembly operation of the bolt, and when the nut appears a loosening trend, the tightening trend of the bolt can be utilized to effectively prevent the nut from loosening, thereby ensuring the reliability of the connection of the first pivot on the frame.

[0023] (4) The first hole section in the inner hole of the bushing is in clearance fit with the first shaft section and the second shaft section on the first pivot, and the second hole section in the inner hole of the bushing is in interference fit with the first shaft section on the first pivot, so that after the bushing is sleeved on the first pivot, the bushing can freely slide along the first pivot but will not fall off the first pivot, which not only facilitates the assembly between the bushing and the first pivot, and ensures that the first pivot, the bushing and the first bearing are assembled together without falling apart, but also enables the first pivot to axially freely slide when the rear swing arm is installed, thereby facilitating the convenience of the first mounting portion installation operation.

[0024] (5) The second bearing adopts a cylindrical needle bearing, which has high load capacity, excellent high-speed performance, is convenient to install, disassemble and maintain, and can utilize the strong axial displacement adaptability of the cylindrical needle bearing to improve the adaptability of the second bearing to the axial movement of the rear swing arm and the stability of the installation of the rear swing arm on the frame.

[0025] The weight-reducing hole arranged on the second pivot can reduce the weight of the second pivot, which helps to realize the lightweight design of the vehicle as a whole. The end of the second pivot extending into the rear swing arm avoids the transmission shaft avoiding hole, which can also avoid the influence of the second pivot on the arrangement of the transmission shaft, and is conducive to the arrangement of the transmission shaft.

[0026] (6) The second sealing ring arranged between the rear swing arm and the second pivot on the outer side of the second bearing can achieve the waterproof and dustproof effect of the second bearing, so as to ensure the smoothness and reliability of the second bearing and help to improve the service life of the second bearing.

[0027] The application also provides a rear swing arm mounting method, which is applied to a straddle-type vehicle and suitable for mounting a rear swing arm in a frame, and the method comprises the following steps:

[0028] pressing a first bearing to a bushing, then sleeving the bushing on a first pivot, and then pressing the first bearing assembled with the bushing and the first pivot into one end of the rear swing arm;

[0029] connecting a second pivot to the frame and pressing a second bearing into the rear swing arm, and making the second pivot pass through the second bearing to connect the other end of the rear swing arm to the frame;

[0030] sleeving a nut on a tool, then pulling the first pivot through the tool after one end of the tool passes through the frame and the first pivot, so that one end of the first pivot slides through the frame;

[0031] connecting a nut to one end of the first pivot passing through the frame, and connecting a bolt in the first pivot after tightening the nut and the first pivot, and making the bolt lock the nut at the end of the first pivot.

[0032] Further, the tool comprises a bulging pipe and a top rod inserted in one end of the bulging pipe, and a first holding bracket is connected to the bulging pipe, and a second holding bracket is connected to the top rod;

[0033] one end of the bulging pipe is adapted to pass through the first pivot from one end of the first pivot and extend to the other end of the first pivot outside, and when the first holding bracket and the second holding bracket are driven to approach each other, the end of the top rod inserted in the bulging pipe can make the end of the bulging pipe extending outside the first pivot expand;

[0034] after the tool passes through the frame and the first pivot, the first pivot is pulled by the end of the bulging pipe expanding.

[0035] Further, a resilient reset member is arranged between the first holding bracket and the second holding bracket;

[0036] The resilient reset member is used to make the first holding bracket and the second holding bracket move away from each other when the driving force on the first holding bracket and the second holding bracket is removed.

[0037] The rear swing arm mounting method can rotate the rear swing arm to be mounted on the frame, and the pivot used for connecting the rear swing arm and the frame is disconnected left and right, so that the inconvenience caused by the whole pivot to the arrangement of the transmission shaft in the straddle type vehicle can be avoided, the arrangement of the transmission shaft in the straddle type vehicle is facilitated, the second bearing can slide axially relative to the second bearing, the assembly stress of the bearings and other components at both ends of the rear swing arm after the rear swing arm is mounted can be avoided, the impact on the bearings and other components at both ends of the rear swing arm during the driving of the vehicle can be reduced, the service life of the bearings and other components can be improved, and the overall quality of the straddle type vehicle is improved.

[0038] In addition, the tool is mainly composed of the expansion pipe, the ejector rod, and the holding supports connected to the expansion pipe and the ejector rod respectively, and after the tool passes through the frame and the first pivot, the first pivot is pulled by the expanded end of the expansion pipe, so that the first pivot passes through the frame. On the one hand, the assembly of the first pivot on the frame is realized while avoiding the hole opening on the rear swing arm, the structural strength and rigidity of the rear swing arm are ensured, and the sealing of the inside of the rear swing arm is ensured, and on the other hand, the tool structure is simple, easy to design and manufacture, and easy to operate with high efficiency, which is conducive to reducing the installation cost of the rear swing arm.

[0039] In addition, by arranging the elastic reset member between the first holding support and the second holding support, when the driving force on the first holding support and the second holding support is removed, the first holding support and the second holding support automatically move away from each other, so that the expanded end of the expansion pipe is reset, the convenience of using the tool is improved, and the installation efficiency of the rear swing arm is further improved.

[0040] Another purpose of the present application is to provide a vehicle, which is a straddle type vehicle, and the rear swing arm in the vehicle is mounted in the frame by the rear swing arm mounting structure as described above.

[0041] The vehicle of the present application adopts the rear swing arm mounting structure as described above, which is conducive to the arrangement of the transmission shaft in the straddle type vehicle, and is conducive to reducing the impact on the bearings and other components at both ends of the rear swing arm during the driving of the vehicle, which can improve the service life of the bearings and other components, and is conducive to improving the overall quality of the straddle type vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0042] The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application, and the illustrative embodiments of the present application and their description serve the purpose of explaining the present application. The accompanying drawings do not constitute an inappropriate limitation on the present application. In the drawings:

[0043] Figure 1 The schematic view of the rear swing arm mounted on the frame according to the embodiments of the present application;

[0044] Figure 2A schematic view of a frame according to an embodiment of the present application;

[0045] Figure 3 A schematic view of a frame according to an embodiment of the present application from another perspective;

[0046] Figure 4 A schematic view of a rear rocker according to an embodiment of the present application;

[0047] Figure 5 A sectional view of a rear rocker according to an embodiment of the present application and a mounting position of a frame;

[0048] Figure 6 A Figure 5 A partial enlarged view of part A;

[0049] Figure 7 A schematic view of a first pivot according to an embodiment of the present application;

[0050] Figure 8 A schematic view of a bushing according to an embodiment of the present application;

[0051] Figure 9 A schematic view of a bore of a bushing according to an embodiment of the present application;

[0052] Figure 10 A schematic view of a cooperation between a first pivot and a bushing according to an embodiment of the present application;

[0053] Figure 11 A Figure 5 A partial enlarged view of part B;

[0054] Figure 12 A schematic view of a second pivot according to an embodiment of the present application;

[0055] Figure 13 A schematic view of a second pivot according to an embodiment of the present application from another perspective;

[0056] Figure 14 A schematic view of a use of a tool according to an embodiment of the present application;

[0057] Figure 15 A schematic view of a structure of a tool according to an embodiment of the present application;

[0058] Figure 16 A schematic view of a composition of a tool according to an embodiment of the present application;

[0059] Figure 17 A Figure 16 A partial enlarged view of part C;

[0060] Figure 18 A schematic view of a tightening tool according to an embodiment of the present application;

[0061] Figure 19 sleeve according to the embodiment of the present application;

[0062] Reference signs:

[0063] 1, rear rocker arm; 2, frame; 3, first mounting portion; 4, second mounting portion; 5, tooling; 6, tightening tool; 7, sleeve;

[0064] 1a, sleeve; 1b, transmission shaft avoiding hole; 1c, inner cavity; 2a, first fork arm; 2b, second fork arm; 201, first mounting hole; 202, second mounting hole; 301, first pivot; 302, bushing; 303, first bearing; 304, nut; 305, bolt; 306, check ring; 307, first sealing ring; 401, second pivot; 402, second bearing; 403, second sealing ring; 501, expansion pipe; 502, ejector rod; 503, first holding support; 504, second holding support; 505, elastic return member; 506, sliding member; 507, sliding rod;

[0065] 3011, central hole; 3011a, tightening hole section; 3011b, threaded hole section; 3011c, through hole section; 3012, shaft shoulder; 301a, first shaft section; 301b, second shaft section; 301c, third shaft section; 3021, bearing mounting groove; 3022, inner hole; 3022a, first hole section; 3022b, second hole section; 401a, threaded connection section; 401b, bearing mounting section; 4011, stop shoulder; 4012, weight-reducing hole; 4013, operation hole; 5011, stop block; 501a, pushing surface; 501b, notch; 502a, end portion; 5031, through hole; 7a, sleeving hole; 701, handle. DETAILED DESCRIPTION

[0066] In order to make the technical solutions of the present application and the advantages thereof clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application.

[0067] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0068] In addition, in the description of the present application, it should be noted that if the terms indicating the orientation or position relationship such as "upper", "lower", "inner", "outer" and the like appear, they are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, if the terms "first", "second" and the like appear, they are also only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0069] In addition, in the description of the present application, unless otherwise explicitly limited, the terms "mounting", "connecting", "connection", "connector" should be understood broadly. For example, it can be a fixed connection, or a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or a communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood in conjunction with the specific circumstances.

[0070] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0071] In the following, the present application will be specifically described through exemplary embodiments. However, it should be understood that the elements, structures and features in one embodiment can also be beneficially combined into other embodiments without further description.

[0072] The embodiment of the first aspect of the present application provides a rear swing arm mounting structure which is applied to a straddle-type vehicle and is suitable for mounting a rear swing arm in a frame, and the rear swing arm mounting structure of the present embodiment is designed by innovation in its mounting form, which helps to improve the overall quality of the rear swing arm.

[0073] In the related art, the rear swing arm 1 is one of the important components at the rear of the straddle-type vehicle, one end of which is pivoted to the frame 2, the other end of which is connected with the rear wheel, and a rear shock absorber connected with the frame 2 is also generally provided at the middle of the rear swing arm 1. This makes the rear swing arm 1 not only play a role in connecting the rear wheel and the frame 2, but also cooperate with the rear shock absorber to reduce the transmission of the rear wheel vibration to the frame, thereby improving the comfort of driving the vehicle.

[0074] At present, in the traditional design, the rear swing arm 1 in a straddle type vehicle such as a motorcycle is generally connected to the frame 2 through a whole pivot shaft which is arranged through the rear swing arm 1. This mounting form can realize the installation of the rear swing arm 1.

[0075] However, on the one hand, due to the need of arranging a drive shaft connected with the rear wheel drive in the position of the rear swing arm 1, the whole pivot shaft arranged through the rear swing arm 1 will cause the drive shaft to be designed to avoid, which is not convenient for the arrangement of the drive shaft and is not conducive to the arrangement of the drive shaft. On the other hand, the pivot shaft arranged through also easily causes assembly stress between the bearing mounting structures at both ends of the rear swing arm 1, which is not conducive to reducing the impact on the bearings and other components at both ends of the rear swing arm caused by the vibration of the rear wheel and other excitations during the driving of the vehicle, and is not conducive to improving the service life of the bearing mounting structure and thus is not conducive to improving the overall quality of the straddle type vehicle.

[0076] In view of this, in order to overcome the deficiencies in the related art, in the rear swing arm mounting structure of the embodiment, the whole design includes a first mounting part 3 at one end of the rear swing arm 1 and a second mounting part 4 at the other end of the rear swing arm 1. Figures 1 to 13 As shown in the figure, the whole design includes a first mounting part 3 at one end of the rear swing arm 1 and a second mounting part 4 at the other end of the rear swing arm 1.

[0077] The first mounting part 3 includes a hollow first pivot shaft 301, a bushing 302, a first bearing 303, a nut 304 and a bolt 305. The first pivot shaft 301 is arranged through the frame 2, the bushing 302 is sleeved on one end of the first pivot shaft 301 which extends into the rear swing arm 1, and the first bearing 303 is arranged between the bushing 302 and the rear swing arm 1. The nut 304 is connected to the other end of the first pivot shaft 301 and fixes the bushing 302 between the first pivot shaft 301 and the frame 2. The bolt 305 is connected in the first pivot shaft 301 and also locks the nut 304 at the end of the first pivot shaft 301.

[0078] The second mounting part 4 includes a second pivot shaft 401 and a second bearing 402. The second pivot shaft 401 is connected to the frame 2, one end of the second pivot shaft 401 extends into the rear swing arm 1, and the second bearing 402 is arranged between the second pivot shaft 401 and the rear swing arm 1 and can also axially slide relative to the second pivot shaft 401.

[0079] Thus, by adopting corresponding pivots for the mounting portions at both ends of the rear swing arm 1, the embodiment can make the pivots for connecting the rear swing arm 1 with the frame 2 be disconnected left and right, avoid inconvenience caused by adopting a whole pivot for the arrangement of the transmission shaft in the straddle-type vehicle, and help the arrangement of the transmission shaft in the straddle-type vehicle. Meanwhile, by adopting the second bearing 402 capable of axially sliding relative to the second pivot 401, the embodiment can also avoid assembly stress of the bearings and other components at both ends of the rear swing arm 1 after installation, help reduce the impact on the bearings and other components at both ends of the rear swing arm during vehicle driving, improve the service life of the bearings and other components, and further improve the overall quality of the straddle-type vehicle.

[0080] Based on the above overall introduction, specifically, still in combination with Figure 1 and Figure 4 It is worth noting that the rear swing arm 1 of the embodiment is in a single swing arm form, and the shock absorber between the rear swing arm 1 and the frame 2 is also in a middle-mounted form.

[0081] In addition, as shown in Figures 1 to 3 , the frame 2 of the embodiment also has two relatively arranged fork arms in structure, and for the convenience of description, based on the positions of the two fork arms in the straddle-type vehicle, they are also called the first fork arm 2a and the second fork arm 2b, respectively. Among them, the first mounting hole 201 is arranged on the first fork arm 2a, and the second mounting hole 202 is also arranged on the second fork arm 2b.

[0082] As an exemplary implementation form, the first mounting portion 3 at one end of the rear swing arm 1 is on the side of the first fork arm 2a, and specifically, one end of the rear swing arm 1 is mounted in the first mounting hole 201. The second mounting portion 4 at the other end of the rear swing arm 1 is on the side of the second fork arm 2b, and correspondingly, the other end of the rear swing arm 1 is mounted in the second mounting hole 202.

[0083] Moreover, still taking the direction shown in Figures 1 to 5 as the reference, as an exemplary implementation form, the above-mentioned first fork arm 2a is on the left side of the vehicle, and correspondingly, the first mounting portion 3 is for mounting the left end of the rear swing arm 1 to the frame 2. The above-mentioned second fork arm 2b is on the right side of the vehicle, and correspondingly, the second mounting portion 4 is for mounting the right end of the rear swing arm 1 to the frame 2.

[0084] As shown in Figure 4 , one end of the rear swing arm 1 connected with the frame 2 of the embodiment, i.e., the end provided with the sleeve 1a (specifically, the front end of the rear swing arm 1), and the sleeve 1a in the rear swing arm 1 is located at a position having an inner cavity 1c, which penetrates through the rear swing arm 1 left and right. Part of the structure in the above-mentioned first mounting portion 3 and the second mounting portion 4 is located in the inner cavity 1c to realize the rotational mounting of the rear swing arm 1 on the frame 2.

[0085] In addition, in the present embodiment, the transmission shaft in the straddle-type vehicle is arranged in the transmission shaft avoiding hole 1b in the rear swing arm 1, which penetrates the rear swing arm 1 from front to back and intersects with the inner cavity 1c at the position of the sleeve 1a. At this time, based on the fact that the pivot between the rear swing arm 1 and the frame 2 is left-right disconnected, the transmission shaft can be arranged in the transmission shaft avoiding hole 1b, and the arranged transmission shaft is generally connected to the power output end of the power assembly (such as the engine) in the vehicle through the universal joint at the front end, and connected to the rear main reducer at the rear end, so as to realize the power transmission to the rear wheels.

[0086] In the present embodiment, the first mounting portion 3 continues to be combined with Figure 5 and Figure 6 As mentioned above, one end of the first pivot 301 in the first mounting portion 3 extends into the inner cavity 1c in the rear swing arm 1, and the first bearing 303 arranged on the first pivot 301 via the bushing 302 is also specifically press-fitted at the left end of the inner cavity 1c, so as to realize the rotational connection between the first pivot 301 and the rear swing arm 1.

[0087] As shown in Figures 5 to 7 In the present embodiment, the hollow of the first pivot 301, that is, the axial through central hole 3011 is arranged in the first pivot 301. At the same time, the end of the first pivot 301 extending into the rear swing arm 1 is also provided with a shaft shoulder 3012, which is used to fix the bushing 302 between the first pivot 301 and the first fork arm 2a in the frame 2 after the nut 304 is connected, so as to realize the fixed arrangement of the first mounting portion 3 on the first fork arm 2a in the frame 2, and thereby realize the rotational arrangement of the rear swing arm 1 on the frame 2 by the first bearing 303.

[0088] It is worth pointing out that, in specific implementation, as an example, still referring to Figure 6 For example, the inner ring of the first bearing 303 can be in contact with the shaft shoulder 3012 at the end of the first pivot 301, so as to indirectly realize the fixed arrangement of the bushing 302 between the first pivot 301 and the frame 2 by the inner ring of the first bearing 303 between the bushing 302 and the shaft shoulder 3012. However, in addition to indirectly realizing the fixed arrangement of the bushing 302 between the first pivot 301 and the frame 2 by the inner ring of the first bearing 303, it is also possible that the end of the bushing 302 close to the shaft shoulder 3012 is in contact with the shaft shoulder 3012, and thereby directly realizes the fixed arrangement of the bushing 302 between the first pivot 301 and the frame 2 by the connected nut 304.

[0089] In some example embodiments of the present embodiment, the first bearing 303 in the first mounting portion 3 may, for example, adopt a deep groove ball bearing. In this way, the first bearing 303 adopts a deep groove ball bearing, which not only has simple structure, convenient use, long service life, and excellent high-speed performance, but also can improve the adaptability of the first bearing 303 to the swing of the rear swing arm 1 and improve the stability of the installation of the rear swing arm 1 on the frame 2 by using the characteristics of the deep groove ball bearing that can bear radial and axial combined load.

[0090] As shown in Figure 6 some example embodiments of the present embodiment, the outer side of the first bearing 303, i.e. the side of the first bearing 303 facing the first fork arm 2a, may, for example, be provided with a retainer ring 306 and a first sealing ring 307.

[0091] The retainer ring 306 is clamped on the rear swing arm 1 and specifically clamped in a clamping groove on the inner wall of the inner cavity 1c, while the retainer ring 306 is arranged close to the first bearing 303 relative to the first sealing ring 307, and the retainer ring 306 can abut against the outer ring of the first bearing 303 after being clamped in the clamping groove on the rear swing arm 1. In this way, the positioning and arrangement of the first bearing 303 in the rear swing arm 1 can be achieved in cooperation with the rear swing arm 1.

[0092] The first sealing ring 307 is located between the rear swing arm 1 and the bushing 302, and the first sealing ring 307 generally adopts an internal embedded skeleton, and a sealing lip is provided at the position abutting against the bushing 302, which is a product available on the market.

[0093] It can be understood that by arranging the retainer ring 306 clamped on the rear swing arm 1 on the outer side of the first bearing 303, the retainer ring 306 can limit and prevent the first bearing 303 from being disengaged in cooperation with the rear swing arm 1, so as to ensure the stability of the connection between the first bearing 303 and the rear swing arm 1. By arranging the first sealing ring 307 between the rear swing arm 1 and the bushing 302 on the outer side of the first bearing 303, the first sealing ring 307 can achieve the waterproof and dustproof effects of the first bearing 303, so as to ensure the smoothness and reliability of the first bearing 303 and help to improve the service life of the first bearing 303.

[0094] In some example embodiments of the present embodiment, as shown in Figures 7 to 9 from the outer peripheral wall of the first pivot shaft 301, the first pivot shaft 301 also has a first shaft segment 301a and a second shaft segment 301b connected thereto. The first shaft segment 301a is close to one end of the first pivot shaft 301 inserted into the rear swing arm 1, i.e. close to the shaft shoulder 3012, and the second shaft segment 301b is close to one end of the first pivot shaft 301 connected to the nut 304, i.e. close to the third shaft segment 301c on the first pivot shaft 301 formed as an external thread, which is specifically used for screwing with the nut 304.

[0095] Meanwhile, a bearing mounting groove 3021 is arranged on the outer peripheral wall of the bushing 302 for accommodating the first bearing 303. The inner hole 3022 of the bushing 302 also has a first hole section 3022a and a second hole section 3022b connected thereto, and when the bushing 302 is sleeved on the first pivot shaft 301, the bushing 302 is sleeved on the first pivot shaft 301 from the side of the second hole section 3022b.

[0096] Based on the design of the first shaft section 301a and the second shaft section 301b on the first pivot shaft 301, and the first hole section 3022a and the second hole section 3022b in the bushing 302, the first hole section 3022a and the first shaft section 301a and the second shaft section 301b, and the second hole section 3022b and the first shaft section 301a are all clearance fit, and the second hole section 3022b and the second shaft section 301b are interference fit.

[0097] At this time, as shown in Figure 10 , the first shaft section 301a and the second shaft section 301b on the first pivot shaft 301 are the positions indicated by the reference number m and the reference number n in Figure 10 , and the first hole section 3022a and the second hole section 3022b in the bushing 302 are the positions indicated by the reference number e and the reference number g in Figure 10 . Obviously, by making the first hole section 3022a in the inner hole 3022 of the bushing 302 and the first shaft section 301a and the second shaft section 301b on the first pivot shaft 301, and the second hole section 3022b in the inner hole 3022 of the bushing 302 and the first shaft section 301a on the first pivot shaft 301 be clearance fit, and the second hole section 3022b in the inner hole 3022 of the bushing 302 and the second shaft section 301b on the first pivot shaft 301 be interference fit, after the bushing 302 is sleeved on the first pivot shaft 301 by press fitting, the bushing 302 can freely slide along the first pivot shaft 301, and due to the existence of the above interference fit, even if the bushing 302 slides to the end of the first pivot shaft 301 with the third shaft section 301c, it will not fall off the first pivot shaft 301.

[0098] Therefore, not only can facilitate the assembly between the bushing 302 and the first pivot shaft 301, and make the first pivot shaft 301, the bushing 302 and the first bearing 303 assembled together without falling apart, but also can realize the axial free sliding of the first pivot shaft 301 when the rear swing arm 1 is installed, which helps to improve the convenience of the first mounting portion 3 installation operation.

[0099] It is worth noting that, in the implementation, the clearance fit and interference fit formed by the first shaft segment 301a and the second shaft segment 301b on the first pivot shaft 301, and the first hole segment 3022a and the second hole segment 3022b in the inner hole 3022 of the bushing 302, can be realized by controlling the outer diameter of the first pivot shaft 301 at different positions, or the inner diameter of the inner hole 3022 of the bushing 302 at different positions.

[0100] In addition, in addition to having different shaft segments from the outside, still referring to Figure 10 It is shown that the central hole 3011 in the first pivot shaft 301 of the embodiment is arranged to also have a tightening hole segment 3011a, a threaded hole segment 3011b, and a through hole segment 3011c arranged in sequence. Among them, the cross section of the tightening hole segment 3011a is a regular polygon (such as a regular hexagon), and the tightening hole segment 3011a can be used in cooperation with a tool (such as a tightening tool 6 in Figure 18 ) inserted therein to drive the first pivot shaft 301 to rotate when tightening the nut 304. The threaded hole segment 3011b is used for bolting the bolt 305 to achieve the connection arrangement of the bolt 305 in the first pivot shaft 301. The through hole segment 3011c is a hole structure that penetrates the first pivot shaft 301, and together with the above-mentioned tightening hole segment 3011a and threaded hole segment 3011b to form the central hole 3011, and realize the hollow arrangement of the first pivot shaft 301.

[0101] In the embodiment, in view of the fact that the nut 304 and the bolt 305 are connected at the end of the first pivot shaft 301 that penetrates the first mounting hole 201, in some exemplary embodiments, as a preferred design, for example, the screwing direction between the nut 304 and the first pivot shaft 301 can be opposite to the screwing direction between the bolt 305 and the first pivot shaft 301.

[0102] At this time, by making the screwing direction between the nut 304 and the first pivot shaft 301 opposite to the screwing direction between the bolt 305 and the first pivot shaft 301, when the bolt 305 is assembled, the rotation trend of the bolt 305 driving the first pivot shaft 301 is opposite to the tightening of the nut 304, so that the first pivot shaft 301 does not need to be clamped and fixed by a tool during the assembly of the bolt 305, and the assembly operation of the bolt 305 can be facilitated. At the same time, by making the screwing direction between the nut 304 and the first pivot shaft 301 opposite to the screwing direction between the bolt 305 and the first pivot shaft 301, when the nut 304 appears to be loose, it can also use the tightening trend of the bolt 305 at this time to effectively prevent the nut 304 from loosening, thereby ensuring the reliability of the connection of the first pivot shaft 301 on the frame 2.

[0103] In specific implementation, the external thread at the third shaft section 301c on the first pivot 301 can be, for example, a forward-threaded thread to be threaded with the nut 304, and the thread on the bolt 305 can be, for example, a reverse-threaded thread to cooperate with the threaded hole section 3011b in the first pivot 301 to achieve the connection of the bolt 305 in the first pivot 301.

[0104] Still by Figure 5 , and continue as Figure 11 As shown in , in this embodiment, in some exemplary implementation forms, the second bearing 402 in the second mounting portion 4 can be, for example, a cylindrical needle roller bearing.

[0105] In this way, the second bearing 402 adopts a cylindrical needle roller bearing, which not only has the advantages of high load-bearing capacity, excellent high-speed performance, and easy installation, disassembly and maintenance, but also can utilize the strong adaptability of the cylindrical needle roller bearing to axial displacement, thereby improving the adaptability of the second bearing 402 to the axial movement of the rear swing arm 1 and enhancing the stability of the installation of the rear swing arm 1 on the frame 2.

[0106] In addition, continue to combine Figure 12 and Figure 13 As shown in the figure, for the second pivot 401 in the second mounting portion 4, also viewed from the outside, the second pivot 401 also has a threaded connection section 401a and a bearing mounting section 401b, and a shoulder 4011 is also provided at the end of the second pivot 401 close to one end of the threaded connection section 401a.

[0107] The threaded connection section 401a is provided with an external thread that mates with the internal thread in the second mounting hole 202 on the second fork arm 2b, thereby securing the second pivot 401 to the frame 2. Furthermore, when the second pivot 401 is threaded into the second mounting hole 202, the shoulder 4011 abuts against the second fork arm 2b, indicating that the second pivot 401 is threaded into place.

[0108] The above-mentioned bearing mounting section 401b is specifically a shaft body with a smooth outer circumferential surface. After the second bearing 402 is press-fitted into the rear swing arm 1, the bearing mounting section 401b is inserted into the inner ring of the second bearing 402 to form radial support for the second bearing 402, thereby realizing the rotational installation of the rear swing arm 1 on the frame 2, and at the same time, it can also realize the axial sliding of the second bearing 402 relative to the second pivot 401.

[0109] In this embodiment, continue as Figures 11 to 13 As shown, in some exemplary embodiments, a weight-reducing hole 4012 may be provided on the second pivot 401 , for example, and in a specific design, the end of the second pivot 401 extending into the rear rocker arm 1 also avoids the transmission shaft avoidance hole 1b on the rear rocker arm 1 .

[0110] Therefore, by arranging the weight-reducing hole 4012 on the second pivot 401, the weight of the second pivot 401 can be reduced, which helps to realize the lightweight design of the vehicle as a whole. The end of the second pivot 401 extending into the inner ring 1c of the rear swing arm 1 avoids the transmission shaft avoiding hole 1b, which can also avoid the influence of the second pivot 401 on the arrangement of the transmission shaft, and is beneficial to the arrangement of the transmission shaft in the rear swing arm 1.

[0111] In order to facilitate the connection of the second pivot 401 in the second mounting hole 202 of the frame 2, as shown in Figure 13 , for example, an operation hole 4013 can be arranged at one end of the second pivot 401. The cross section of the operation hole 4013 can be a regular polygon (such as a regular hexagon) in general, so that a screwing tool (such as an internal hexagonal wrench) with a corresponding cross section can be used to screw and tighten the second pivot 401.

[0112] As shown in Figure 11 , in some exemplary embodiments of the present embodiment, the outer side of the second bearing 402, i.e. the side of the second bearing 402 facing the second fork arm 2b, can be provided with a second sealing ring 403, which is located between the rear swing arm 1 and the second pivot 401, and the second sealing ring 403 also adopts an internal embedded skeleton, and the existing product with a sealing lip at the position abutting against the second pivot 402 can be used.

[0113] By arranging the second sealing ring 403 between the rear swing arm 1 and the second pivot 401 on the outer side of the second bearing 402, it can be understood that it can realize the waterproof and dustproof effect of the second bearing 402, and can ensure the smooth and reliable operation of the second bearing 402, which helps to improve the service life of the second bearing 402.

[0114] It is worth noting that, for the rear swing arm mounting structure of the present embodiment, based on the above exemplary embodiments, as a preferred embodiment, as shown in Figures 1 to 13 , it can include a first mounting portion 3 at one end, e.g. the left end, of the rear swing arm 1, and a second mounting portion 4 at the other end, e.g. the right end, of the rear swing arm 1.

[0115] The first mounting portion 3 comprises a first pivot 301 with a central hole 3011, a bushing 302, a first bearing 303, a nut 304 and a bolt 305. The first pivot 301 is inserted into the first mounting hole 201 on the first fork arm 2a, the bushing 302 is sleeved on the end of the first pivot 301 extending into the inner cavity 1c of the rear swing arm 1, and the first bearing 303 is arranged between the bushing 302 and the rear swing arm 1. The nut 304 is connected to the other end of the first pivot 301 extending out of the first mounting hole 201, and the bushing 302 is fixed between the shaft shoulder 3012 on the first pivot 301 and the first fork arm 2a, and the bolt 305 is connected in the central hole 3011 in the first pivot 301, and also locks the nut 304 at the end of the first pivot 301.

[0116] The second mounting portion 4 comprises a second pivot 401 and a second bearing 402. The second pivot 401 is connected in the second mounting hole 202 on the second fork arm 2b, and one end of the second pivot 401 extends into the inner cavity 1c in the rear swing arm 1. The second bearing 402 is arranged between the second pivot 401 and the rear swing arm 1, and the second bearing 402 can also slide axially relative to the second pivot 401.

[0117] In addition, a retainer 306 and a first sealing ring 307 are arranged in sequence on the outside of the first bearing 303, and a second sealing ring 403 is arranged on the outside of the second bearing 402. Moreover, the screwing direction between the nut 304 and the first pivot 301 in the first mounting portion 3 is opposite to the screwing direction between the bolt 305 and the first pivot 301.

[0118] In the preferred embodiment of the above rear swing arm mounting structure, the specific arrangement and arrangement of the components in the first mounting portion 3 and the second mounting portion 4 can still refer to the description in the above exemplary embodiments, and in the preferred embodiment, the components in the first mounting portion 3 and the second mounting portion 4 can also refer to the description in the above exemplary embodiments based on the beneficial effects brought by their design.

[0119] The rear swing arm mounting structure of the present embodiment, designed as above, can make the pivot for connecting the rear swing arm and the frame be disconnected left and right, which is helpful for the arrangement of the transmission shaft in the straddle-type vehicle, and can also avoid the assembly stress of the bearings and other components at both ends after the rear swing arm is mounted, which is helpful for reducing the impact on the bearings and other components at both ends of the rear swing arm during vehicle driving, and can improve the service life of the bearings and other components, and is conducive to improving the overall quality of the straddle-type vehicle.

[0120] The embodiment of the second aspect of the present application provides a rear swing arm mounting method, which is based on the rear swing arm mounting structure of the first aspect of the embodiment described above, is suitable for mounting the rear swing arm 1 in the vehicle frame 2 of a straddle-type vehicle, and comprises the following mounting process.

[0121] In the first step, the first bearing 303 is press-fitted to the bushing 302, the bushing 302 is then sleeved on the first pivot shaft 301, and the first bearing 303 assembled with the bushing 302 and the first pivot shaft 301 is press-fitted into one end of the rear swing arm 1.

[0122] In the first step, the first bearing 303 is press-fitted to the bushing 302, the bushing 302 is then sleeved on the first pivot shaft 301, and the first bearing 303 assembled with the bushing 302 and the first pivot shaft 301 is press-fitted into one end of the rear swing arm 1.

[0123] After the bushing 302 is sleeved on the first pivot shaft 301, the first pivot shaft 301 with the bushing 302 and the first bearing 303 is placed in the end of the inner cavity 1c of the rear swing arm 1, and a press-fitting tool is used to apply a press-fitting force to the outer ring of the first bearing 303, so that the first bearing 303 assembled with the bushing 302 and the first pivot shaft 301 is press-fitted into the left end of the inner cavity 1c of the rear swing arm 1. Then, a circlip plier is used to install the retainer ring 306 into the clamping groove in the rear swing arm 1, and the first sealing ring 307 is press-fitted between the rear swing arm 1 and the bushing 302.

[0124] In the second step, the second pivot shaft 401 is connected to the vehicle frame 2, and the second bearing 402 is press-fitted into the rear swing arm 1, and the second pivot shaft 401 is inserted into the second bearing 402 to connect the other end of the rear swing arm 1 to the vehicle frame 2.

[0125] In the second step, the second pivot shaft 401 is connected to the vehicle frame 2, and the second bearing 402 is press-fitted into the rear swing arm 1, and the second pivot shaft 401 is inserted into the second bearing 402 to connect the other end of the rear swing arm 1 to the vehicle frame 2.

[0126] It should be noted that when moving the rear swing arm 1, the first pivot 301 located at the left end of the inner cavity 1c should be avoided from colliding with the first fork arm 2a due to the outward extension, that is, when moving the rear swing arm 1, the first pivot 301 should be pressed first to slide a certain distance inside the inner cavity 1c. In addition, after the rear swing arm 1 is installed on the right second fork arm 2b through the second pivot 401 and the second bearing 402, the relative position between the front end of the rear swing arm 1 and the frame 2 is basically determined by the support force provided by the second mounting portion 4 for the rear swing arm 1. Then, the shock absorber can be connected between the frame 2 and the rear swing arm 1, so that the front end of the rear swing arm 1 can swing relative to the frame 2 through the extension and contraction of the shock absorber.

[0127] Thirdly, the nut 304 is sleeved on the tool 5, so that one end of the tool 5 passes through the frame 2 and the first pivot 301, and then the first pivot 301 is pulled by the tool 5, so that one end of the first pivot 301 slides through the frame 2.

[0128] In the above third step, specifically, an exemplary structure of the tool 5 used can be as shown in Figures 14 to 17 In structure, the tool 5 can include, for example, a bulging pipe 501, a top rod 502 inserted into the bulging pipe 501 at one end, a first holding bracket 503 connected to the bulging pipe 501, and a second holding bracket 504 connected to the top rod 502.

[0129] Wherein, one end of the bulging pipe 501 is adapted to pass through the first pivot 301 by one end of the first pivot 301 and extend to the other end of the first pivot 301 outside, and when the first holding bracket 503 and the second holding bracket 504 are driven to approach each other, the end of the top rod 502 inserted into the bulging pipe 501 can make the end of the bulging pipe 501 outside the first pivot 301 expand. At this time, based on the end of the bulging pipe 501 being able to expand when the top rod 502 is inserted, after the tool 5 passes through the frame 2 and the first pivot 301, the first pivot 301 can be pulled by the end of the bulging pipe 501 to make the first pivot 301 pass through the first mounting hole 201 on the first fork arm 2a.

[0130] It can be understood that the tool 5 of the present embodiment is mainly composed of the expansion pipe 501, the ejector rod 502, and the holding bracket connected to the expansion pipe 501 and the ejector rod 502 respectively. After the tool 5 passes through the first mounting hole 201 on the frame 2 and the center hole 3011 on the first pivot 301, the first pivot 301 can be pulled by the expanded end of the expansion pipe 501 through the mutual approach of the two holding brackets, so that the first pivot 301 passes through the first mounting hole 201. On the one hand, it can realize the assembly of the first pivot 301 on the frame 2 while avoiding the hole on the rear swing arm 1, which helps to ensure the structural strength and rigidity of the position of the inner cavity 1c of the rear swing arm 1 and the sealing of the inside of the rear swing arm 1. On the other hand, the tool 5 has the advantages of simple structure, easy design and preparation, simple operation, high efficiency and the like, thereby facilitating the reduction of the installation cost of the rear swing arm 1.

[0131] In some exemplary embodiments of the present embodiment, when the ejector rod 502 is inserted, one end of the expansion pipe 501 can be expanded. In a specific design, for example, the inner wall of the end of the expansion pipe 501 extending out of the pivot 301 can be provided with an inclined pushing surface 501a, and a gap 501b penetrating the inner wall of the expansion pipe 501 is arranged at the end of the expansion pipe 501.

[0132] Therefore, the end of the ejector rod 502 inserted into the expansion pipe 501 pushes the pushing surface 501a, so that the end of the expansion pipe 501 extending out of the first pivot 301 can be expanded. By arranging the inner wall of the end of the expansion pipe 501 extending out of the first pivot 301 as an inclined pushing surface 501a and arranging a gap 501b penetrating the inner wall of the expansion pipe 501, the expansion of the end of the expansion pipe 501 can be facilitated when the ejector rod 502 is inserted into the expansion pipe 501, and the structure is simple and easy to design and form.

[0133] Further, in some exemplary embodiments, referring back to Figure 17 As shown in the figure, the gap 501b can be a plurality of gaps uniformly distributed along the circumference of the expansion pipe 501. By using a plurality of gaps 501b uniformly distributed, the expansion of the end of the expansion pipe 501 can be facilitated, and the expansion degree of each position of the end of the expansion pipe 501 can be more uniform, so that the first pivot 301 can be pulled more stably after the end of the expansion pipe 501 extending out of the first pivot 301 is expanded.

[0134] In addition, on the basis of the plurality of evenly spaced apertures 501b, in some exemplary embodiments, the abutting surface 501a can also be a circumferential ring around the inflation tube 501, and the inner wall of the end of the inflation tube 501 capable of being inflated is a conical surface. In this way, the inner wall of the end of the inflation tube 501 capable of being inflated is a conical surface, which can cooperate with the plurality of evenly spaced apertures 501b to better inflate under the action of the ejector rod 502, thereby helping to further improve the performance of the tool.

[0135] In this embodiment, still in combination with Figure 16 As shown in the figure, in some exemplary embodiments, the end portion 502a of the end of the ejector rod 502 inserted into the inflation tube 501 can be conical, and the ejector rod 502 pushes against the abutting surface 501a through the conical end portion 502a. In this way, the end of the end of the inflation tube 501 capable of being inflated is conical, which helps to inflate each position of the end of the inflation tube 501 under the action of the ejector rod 502, and the inflation degree is uniform, so that the inflation tube 501 can pull the first pivot 301 more stably, which is beneficial to ensure the smooth installation of the rear swing arm 1.

[0136] Continuing to refer to Figure 15 and Figure 16 As shown in the figure, in some exemplary embodiments, a radially outwardly protruding stopper 5011 can be arranged on the inflation tube 501, and the stopper 5011 is mainly used to stop the nut 304 sleeved on the inflation tube 501 when the end of the inflation tube 501 passes through the center hole 3011. In this way, the nut 304 sleeved on the inflation tube 501 can be prevented from sliding towards the first holding bracket 503, which is inconvenient for the operation of the tool 5, and helps to improve the use quality of the tool 5.

[0137] In some exemplary embodiments of the present embodiment, a resilient reset member 505 can be arranged between the first holding bracket 503 and the second holding bracket 504. The resilient reset member 505 is mainly used to enable the first holding bracket 503 and the second holding bracket 504 to move away from each other when the driving force on the first holding bracket 503 and the second holding bracket 504 is removed.

[0138] At this time, the resilient reset member 505 arranged between the first holding bracket 503 and the second holding bracket 504 can enable the first holding bracket and the second holding bracket to automatically move away from each other when the driving force on the first holding bracket 503 and the second holding bracket 504 is removed, so that the end of the inflation tube 501 capable of being inflated can be automatically reset, thereby increasing the convenience of using the tool 5 and helping to further improve the installation efficiency of the rear swing arm 1.

[0139] In a specific implementation, as an exemplary arrangement of the elastic return member 505 between the first holding bracket 503 and the second holding bracket 504, for example, the present embodiment can be provided with a slide bar assembly between the first holding bracket 503 and the second holding bracket 504, and continuing to refer to Figure 15 and Figure 16 shown, the slide bar assembly includes a slide bar 507 connected to the second holding bracket 504, and a slide member 506 slidingly arranged in a through hole 5031 of the first holding bracket 503. Wherein, one end of the slide member 506 is constrained on the side of the first holding bracket 503 facing away from the second holding bracket 404, the other end of the slide member 506 is connected to the slide bar 507, and the elastic return member 505 is arranged on the slide bar assembly, and specifically between the first holding bracket 503 and the slide bar 507.

[0140] It can be understood that by arranging the slide bar assembly mainly composed of the slide bar 507 and the slide member 506 between the first holding bracket 503 and the second holding bracket 504, and arranging the elastic return member 505 on the slide bar assembly, it is beneficial to the arrangement of the elastic return member 505 between the two holding brackets, and by using the relative sliding of the slide bar assembly between the first holding bracket 503 and the second holding bracket 504, it is obvious that it can also increase the smoothness of the relative sliding between the top rod 502 and the expansion pipe 501, and is beneficial to improving the use quality of the tooling 5.

[0141] In some exemplary embodiments of the present embodiment based on the arrangement of the slide bar assembly, for example, the slide bar assembly can be arranged as two symmetrical groups, and the elastic return member is arranged at each of the slide bar assemblies. In this way, by using two symmetrical slide bar assemblies, the rotation of the top rod 502 relative to the expansion pipe 501 can be effectively prevented while the top rod 502 slides relative to the expansion pipe 501, which can avoid the inconvenience of using the tooling 5.

[0142] Continuing to refer to Figure 15 and Figure 16 In some exemplary embodiments of the present embodiment, the elastic return member 505 described above can be a spring sleeved on the slide member 506. At this time, by using a spring sleeved on the slide member 506 as the elastic return member, it not only has a simple structure and low cost, but also can ensure the stability of the arrangement of the elastic return member 505.

[0143] In addition, in a specific implementation, as an example, the slide rod 507 can be fixed to the second holding support 504 by welding or screwing, or can be integrally formed with the second holding support 504. The slide member 506 can be screwed, for example, so that the head of one end of the screw can be used to constrain one end of the slide member 506 on the side of the first holding support 503 facing away from the second holding support 404, and the screwing between the screw and the slide rod 507 can be used to connect the other end of the slide member 506 to the slide rod 507.

[0144] Based on the exemplary structure of the tool 5, the nut 304 is fitted on the tool 5, i.e., on the expansion tube 501, and then one end of the expansion tube 501 is passed through the first mounting hole 201 in the frame 2 and the central hole 3011 in the first pivot 301 without bringing the two holding supports close to each other. Then, the two holding supports are held tightly by hand to bring them close to each other, so that the tapered end 502a of the push rod 502 pushes the abutting surface 501a in the expansion tube 501, and the expansion tube 501 is expanded at the end outside the first pivot 301.

[0145] After the expansion tube 501 is expanded at the end outside the first pivot 301, the two holding supports are kept being driven and the expansion tube 501 is pulled outward, so that the tool 5 pulls the first pivot 301, and one end of the first pivot 301 is slid through the first mounting hole 201 to achieve the arrangement of the first pivot 301 passing through the frame 2.

[0146] In the fourth step, the nut 304 is connected to the end of the first pivot 301 passing through the frame 2, and after the nut 304 is tightened with the first pivot 301, the bolt 305 is connected inside the first pivot 301, and the bolt 305 locks the nut 304 at the end of the first pivot 301.

[0147] In the above fourth step, specifically, after the tool 5 makes one end of the first pivot 301 slide through the first mounting hole 201, the nut 303 can be connected to the first pivot 301 by screwing. Then, the driving force on the two holding supports of the tool 5 can be removed, so that the push rod 502 slides back under the action of the elastic return member 505, and the expanded end of the expansion tube 501 also returns. Then, the tool 5 can be pulled out of the first pivot 301 and the first mounting hole 201.

[0148] After the tool 5 is pulled out, to tighten the nut 303 on the first pivot 301, a tightening tool 6 as shown in Figure 18 and a sleeve 7 as shown in Figure 19 may be used, for example.

[0149] The cross section of the tightening tool 6 is a regular polygon matching the tightening hole section 3011c on the first pivot 301. One end of the tightening tool 6 is inserted into the tightening hole section 3011c on the first pivot 301, and then a wrench or the like is used to hold the tightening tool 6 to tighten the first pivot 301. The sleeve 7 has a sleeve hole 7a matching the outer contour of the nut 304 and is provided with a handle 701 for holding the sleeve 7. After the sleeve 7 is sleeved on the nut 304, the nut 304 is prevented from rotating, and then the tightening tool 6 is used to tighten the first pivot 301, thereby tightening the nut 304 and the first pivot 301.

[0150] After the nut 304 is tightened, the bolt 305 is connected into the central hole 3011 in the first pivot 301, and the screw thread direction of the bolt 305 and the nut 304 is opposite. After the bolt 305 is tightened, the bolt 305 locks the nut 304 at the end of the first pivot 301, thereby completing the installation of the rear swing arm 1 on the frame 2.

[0151] The rear swing arm installation method of the embodiment can rotate the front end of the rear swing arm 1 to be installed on the frame 2 through the above installation process. The pivot used to connect the rear swing arm 1 and the frame 2 is split into left and right parts, which avoids the inconvenience of arranging the transmission shaft in the straddle-type vehicle caused by using a whole pivot, facilitates the arrangement of the transmission shaft in the straddle-type vehicle, and enables the second bearing 402 to axially slide relative to the second pivot 401, avoids the assembly stress of the bearings and the like at both ends of the rear swing arm 1 after the installation of the rear swing arm 1, facilitates the reduction of the impact on the bearings and the like at both ends of the rear swing arm 1 during the driving of the vehicle, prolongs the service life of the bearings and the like, and improves the overall quality of the straddle-type vehicle.

[0152] The third aspect of the embodiment provides a vehicle, which is a straddle-type vehicle, and the rear swing arm 1 in the vehicle is installed in the frame 2 through the rear swing arm installation structure as described in the first aspect of the embodiment.

[0153] The rear swing arm 1, the frame 2, and the installation structure for the installation of the rear swing arm 1 in the embodiment can be referred to the related descriptions in the first aspect of the embodiment. Meanwhile, the specific installation method during the installation can be referred to the related descriptions in the second aspect of the embodiment.

[0154] The vehicle in the embodiment facilitates the arrangement of the transmission shaft in the straddle-type vehicle, facilitates the reduction of the impact on the bearings and the like at both ends of the rear swing arm 1 during the driving of the vehicle, prolongs the service life of the bearings and the like, and improves the overall quality of the straddle-type vehicle.

[0155] The above merely describes some embodiments of the present application, and is not intended to limit the present application. The technical features or structures in the foregoing different embodiments can be combined arbitrarily to form other specific technical solutions according to the needs. Various changes and modifications can be made by those skilled in the art based on the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A rear swing arm mounting structure, applied to a straddle-type vehicle and suitable for mounting a rear swing arm (1) in a vehicle frame (2), characterized in that: It comprises a first mounting portion (3) located at one end of the rear rocker arm (1), and a second mounting portion (4) located at the other end of the rear rocker arm (1); The first mounting portion (3) includes a hollow first pivot (301), a bushing (302), a first bearing (303), a nut (304) and a bolt (305), wherein the first pivot (301) is inserted into the vehicle frame (2), the bushing (302) is sleeved on one end of the first pivot (301) extending into the rear rocker arm (1), the first bearing (303) is disposed between the bushing (302) and the rear rocker arm (1), the nut (304) is connected to the other end of the first pivot (301) and fixes the bushing (302) between the first pivot (301) and the vehicle frame (2), and the bolt (305) is connected to the first pivot (301) and locks the nut (304) at the end of the first pivot (301); The second mounting portion (4) includes a second pivot (401) and a second bearing (402), wherein the second pivot (401) is connected to the vehicle frame (2), and one end of the second pivot (401) extends into the rear swing arm (1), and the second bearing (402) is arranged between the second pivot (401) and the rear swing arm (1), and the second bearing (402) is capable of axially sliding relative to the second pivot (401).

2. The rear swing arm mounting structure according to claim 1, characterized in that: The first bearing (303) is a deep groove ball bearing; and / or, A retaining ring (306) and a first sealing ring (307) are provided on the outside of the first bearing (303); the retaining ring (306) is clamped on the rear rocker arm (1); and the first sealing ring (307) is located between the rear rocker arm (1) and the bushing (302).

3. The rear swing arm mounting structure according to claim 1, characterized in that: The screw connection direction between the nut (304) and the first pivot (301) is opposite to the screw connection direction between the bolt (305) and the first pivot (301).

4. The rear swing arm mounting structure according to claim 1, characterized in that: The first pivot (301) has a first shaft section (301a) and a second shaft section (301b) connected to each other, the first shaft section (301a) being close to an end of the first pivot (301) extending into the rear rocker arm (1), and the second shaft section (301b) being close to an end of the first pivot (301) connected to the nut (304); The inner hole (3022) of the bushing (302) has a first hole section (3022a) and a second hole section (3022b) connected to each other, and the bushing (302) is inserted into the first pivot (301) from the second hole section (3022b); There is a clearance fit between the first hole section (3022a) and the first shaft section (301a) and the second shaft section (301b), as well as between the second hole section (3022b) and the first shaft section (301a), and an interference fit between the second hole section (3022b) and the second shaft section (301b).

5. The rear swing arm mounting structure according to claim 1, characterized in that: The second bearing (402) is a cylindrical needle roller bearing; and / or, A weight-reducing hole (4012) is provided on the second pivot (401), and one end of the second pivot (401) extending into the rear rocker arm (1) avoids the transmission shaft avoidance hole (1b) on the rear rocker arm (1).

6. The rear swing arm mounting structure according to any one of claims 1 to 5, characterized in that: A second sealing ring (403) is provided on the outer side of the second bearing (402), and the second sealing ring (403) is located between the rear rocker arm (1) and the second pivot (401).

7. A rear swing arm installation method, applied to a straddle-type vehicle, and suitable for installing a rear swing arm (1) in a vehicle frame (2), characterized in that: The method includes: Pressing the first bearing (303) onto the bushing (302), then sleeve the bushing (302) onto the first pivot (301), and then press-fitting the first bearing (303) assembled with the bushing (302) and the first pivot (301) into one end of the rear rocker arm (1); Connecting the second pivot (401) to the vehicle frame (2), and press-fitting the second bearing (402) into the rear rocker arm (1), and allowing the second pivot (401) to penetrate the second bearing (402), so as to connect the other end of the rear rocker arm (1) to the vehicle frame (2); The nut (304) is mounted on the tooling (5) so that one end of the tooling (5) passes through the vehicle frame (2) and the first pivot (301), and then the first pivot (301) is pulled by the tooling (5) so that one end of the first pivot (301) slides through the vehicle frame (2); A nut (304) is connected to one end of the first pivot (301) passing through the frame (2), and after the nut (304) and the first pivot (301) are tightened, a bolt (305) is connected to the inside of the first pivot (301), and the bolt (305) locks the nut (304) at the end of the first pivot (301).

8. The rear swing arm installation method according to claim 7, characterized in that: The tooling (5) comprises an expansion tube (501) and a push rod (502) with one end inserted into the expansion tube (501), and the expansion tube (501) is connected to a first holding bracket (503), and the push rod (502) is connected to a second holding bracket (504); One end of the expansion tube (501) is suitable for passing through the first pivot (301) from one end of the first pivot (301) and extending to the outside of the other end of the first pivot (301), and when the first holding bracket (503) and the second holding bracket (504) are driven to approach each other, the end of the push rod (502) inserted into the expansion tube (501) can cause the end of the expansion tube (501) extending to the outside of the first pivot (301) to expand; After the tooling (5) passes through the vehicle frame (2) and the first pivot (301), the first pivot (301) is pulled by the expanded end of the expansion tube (501).

9. The rear swing arm installation method according to claim 8, characterized in that: An elastic reset member (505) is provided between the first holding bracket (503) and the second holding bracket (504); The elastic reset member (505) is used to move the first holding bracket (503) and the second holding bracket (504) away from each other when the driving force on the first holding bracket (503) and the second holding bracket (504) is removed.

10. A vehicle, which is a straddle-type vehicle, characterized in that: The rear swing arm (1) in the vehicle is mounted in the vehicle frame (2) via the rear swing arm mounting structure according to any one of claims 1 to 6.

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