Connecting assembly, drive axle and vehicle

Abstract

The utility model relates to the technical field of vehicle transmission, in particular to a connecting assembly, a drive axle and a vehicle, the connecting assembly comprises a first connecting piece, a second connecting piece, a third connecting piece and a fourth connecting piece, the second connecting piece is provided with a mounting hole for placing the mounting part, and an inner snap spring groove corresponding to the outer snap spring groove is formed in the mounting hole; the clamping spring comprises a supporting arc section and an anti-disengagement arc section. The supporting arc section abuts against the inner clamping spring groove when the clamping spring is preassembled in the inner clamping spring groove, and at least part of the anti-disengaging arc section protrudes out of a groove opening of the inner clamping spring groove. The protruding part of the anti-disengaging arc section can be expanded into the inner clamping spring groove after being abutted by the installation part arranged in the installation hole, and retracts into the outer clamping spring groove to be matched with the outer clamping spring groove when the installation part is installed in place. Through the arrangement of the structure, a traditional clamp spring structure and a corresponding assembly mode are avoided, namely, the clamp spring does not need to be preassembled in the outer clamp spring groove, and therefore the problem that assembly is difficult due to the fact that the drooping amount of the clamp spring is large is avoided.

Description

Technical Field

[0001] The present application relates to the field of vehicle transmission technology, and in particular to a connection assembly, a drive axle including the connection assembly, and a vehicle including the drive axle. Background Art

[0002] At present, the drive shaft assembly is usually composed of an outer fixed joint, an inner movable joint (i.e., the drive shaft movable joint), and an intermediate shaft rod structure. The outer fixed joint is connected to the wheel hub bearing, and the inner movable joint is connected to the reducer. The power of the vehicle is transmitted to the drive shaft movable joint, the intermediate shaft rod, the outer fixed joint, and finally to the wheel hub bearing and the wheel through the reducer. Among them, the drive shaft movable joint is usually connected to the reducer end by spline matching. The drive shaft movable joint is provided with an external spline structure, and the differential half-shaft gear at the reducer end is provided with an internal spline structure, and the two are prevented from falling off by a retaining spring. The specific operation process is that the external spline head of the drive shaft movable joint is provided with a retaining spring groove structure for pre-installing the retaining spring. During assembly, the drive shaft movable joint with the retaining spring installed is inserted into the inner spline small diameter inner hole of the half-shaft gear.

[0003] Due to the structural limitations of the existing retaining spring, after being pre-installed in the retaining spring groove of the driving shaft moving joint (which can be understood as the first connecting member), the retaining spring has a certain amount of sag, causing the retaining spring to sag to the end of the half-shaft gear (which can be understood as the second connecting member) when entering the spline minor diameter inner hole (which can be understood as the mounting hole on the second connecting member) and interfere with it, generating assembly resistance and making assembly difficult. Summary of the invention

[0004] The purpose of the present application is to provide a connecting assembly, a drive axle including the connecting assembly and a vehicle including the drive axle, aiming to solve the technical problem in the prior art that due to the structural limitations of the existing retaining springs, two connecting parts that need to be limited by retaining springs are difficult to assemble due to a certain amount of droop in the retaining springs.

[0005] To achieve this purpose, the technical solution adopted in the present application is: to provide a connecting component, including: a first connecting member, which has a mounting portion, and an outer retaining spring groove is formed on the outer circumferential surface of the mounting portion; a second connecting member, which has a mounting hole for the mounting portion to be inserted, and an inner retaining spring groove corresponding to the outer retaining spring groove is formed on the inner circumferential surface of the mounting hole; and a retaining spring, including a supporting arc segment and an anti-slip arc segment; the supporting arc segment abuts against the inner retaining spring groove when the retaining spring is pre-installed in the inner retaining spring groove, and the anti-slip arc segment at least partially protrudes from the notch of the inner retaining spring groove; the protruding part of the anti-slip arc segment can expand into the inner retaining spring groove after being pressed against by the mounting portion inserted into the mounting hole, and retract into the outer retaining spring groove to cooperate with the outer retaining spring groove when the mounting portion is installed in place.

[0006] In one or more embodiments, the retaining spring also includes a transition fillet segment, one end of which is connected to the supporting arc segment and tangent to the supporting arc segment; the other end of the transition fillet segment is connected to the anti-slip arc and tangent to the anti-slip arc segment.

[0007] In one or more embodiments, the number of the supporting arc segments, the anti-slipping arc segments and the transition rounded corner segments are all multiple, and the multiple supporting arc segments and the multiple anti-slipping arc segments are alternately arranged and connected in sequence through the transition rounded corner segments along the circumferential direction.

[0008] In one or more embodiments, the number of the anti-slip arc segments is 3-6.

[0009] In one or more embodiments, the retaining spring further includes an opening section, and the opening section is formed on one of the supporting arc sections.

[0010] In one or more embodiments, two sides of the opening section respectively have a portion of the supporting arc segment.

[0011] In one or more embodiments, the first connecting member is a drive shaft, the mounting portion is a drive shaft moving joint, the outer peripheral surface of the drive shaft moving joint is provided with an external spline, and the external retaining ring groove is formed on the external spline; the second connecting member is a differential half-shaft gear, the mounting hole is provided with an internal spline corresponding to the external spline, and the internal retaining ring groove is formed on the internal spline.

[0012] In one or more embodiments, the supporting arc segment, the anti-slip arc segment and the transition fillet segment have the same ring width size; the inner retaining ring groove is a rectangular ring groove, and the bottom diameter size of the inner retaining ring groove is larger than the sum of the major diameter size of the external spline and twice the ring width size.

[0013] In one or more embodiments, an outer end portion of the driving shaft moving joint is formed with a chamfered structure.

[0014] In one or more embodiments, the outer retaining ring groove is a trapezoidal annular groove, and the outer retaining ring groove has an outer groove wall close to the outer end of the drive shaft movable section and an inner groove wall opposite to the outer groove wall, the inner groove wall is perpendicular to the bottom surface of the outer retaining ring groove, and the outer groove wall extends obliquely from the bottom surface of the outer retaining ring groove in a direction away from the inner groove wall.

[0015] A second aspect of the present application provides a drive axle, comprising the above-mentioned connection assembly.

[0016] A third aspect of the present application provides a vehicle, comprising the above-mentioned drive axle.

[0017] One of the above technical solutions has the following advantages or beneficial effects: by pre-installing the retaining spring in the inner retaining spring groove, and setting the retaining spring to include a supporting arc segment, so that the supporting arc segment abuts against the inner retaining spring groove during installation, after the mounting part enters the mounting hole and abuts against the anti-slip arc segment, the supporting arc segment can provide better support so that the retaining spring expands into the inner retaining spring groove, thereby completing the assembly of the connecting component; the setting of this structure avoids the use of traditional retaining spring structure and corresponding assembly method, that is, there is no need to pre-install the retaining spring in the outer retaining spring groove, thereby avoiding the problem of assembly difficulty caused by large sag of the retaining spring.

[0018] Other advantages of the present application and the technical effects of the preferred embodiments will be further described in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. In the drawings:

[0020] Figure 1 It is a schematic diagram of the planar structure of the retaining spring provided in the embodiment of the present application;

[0021] Figure 2 is a schematic cross-sectional structural diagram of a connection assembly provided in an embodiment of the present application;

[0022] Figure 3 is a schematic diagram of the planar structure of the second connecting member or the differential side gear provided in an embodiment of the present application;

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the retaining spring provided in the embodiment of the present application, which is pre-installed in the inner retaining spring groove of the second connecting member or the differential axle gear;

[0024] Figure 5 It is a schematic diagram of the planar structure of the first connecting member or the driving shaft provided in an embodiment of the present application.

[0025] Among them, the reference numerals in the figure are:

[0026] 1 first connecting member 11 mounting portion 12 outer retaining ring groove

[0027] 121 outer tank wall 122 inner tank wall

[0028] 2Second connecting member 21Installation hole 22Circlip groove

[0029] 3 circlip 31 support arc segment 32 anti-slip arc segment

[0030] 33 transition fillet section 34 opening section

[0031] 4 external splines 5 internal splines 6 chamfer structure DETAILED DESCRIPTION

[0032] The specific implementation of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present application, and is not used to limit the present application.

[0033] like Figures 1 to 5 As shown, it is a preferred embodiment provided by the present application.

[0034] A connecting assembly provided in this embodiment can be specifically used between the driving shaft moving joint of the vehicle and the differential half-shaft gear at the reducer end. Of course, it can also be applied to other positions of the drive axle. Furthermore, the connecting assembly can also be used for other two connecting parts that need to rely on retaining springs for axial limitation. The specific application scenario is not limited here.

[0035] The connecting component may include a first connecting member 1, a second connecting member 2 and a retaining spring 3, wherein the first connecting member 1 has a mounting portion 11, and an outer retaining spring groove 12 is formed on the outer peripheral surface of the mounting portion 11; the second connecting member 2 has a mounting hole 21 for the mounting portion 11 to be inserted, and an inner retaining spring groove 22 corresponding to the outer retaining spring groove 12 is formed in the mounting hole 21, and a retaining spring 3 is provided between the outer retaining spring groove 12 and the inner retaining spring groove 22, and the outer retaining spring groove 12 and the inner retaining spring groove 22 can cooperate with each other to achieve the fixing of the retaining spring 3.

[0036] Circlip 3, can be as Figure 1 As shown, the whole is roughly in the shape of a ring, including an outwardly curved supporting arc segment 31 and an inwardly curved anti-slipping arc segment 32. A specific implementation is that the supporting arc segment 31 can be set as an arc segment of a standard outer circle, and the anti-slipping arc segment 32 is an inwardly curved arc segment spliced ​​on the standard outer circle.

[0037] When the retaining spring 3 is pre-installed in the inner retaining spring groove 22, the supporting arc segment 31 abuts against the inner retaining spring groove 22, that is, the supporting arc segment 31 of the retaining spring 3 must fit the bottom surface of the inner retaining spring groove 22, which can play a supporting and fixing role; when the anti-slip arc segment 32 expands, if the supporting arc segment 31 does not fit the bottom surface of the inner retaining spring groove 22, the expansion force cannot be transmitted. This design makes the retaining spring 3 balanced in force during expansion and contraction, and the structural setting is reasonable. At the same time, the retaining spring 3 can be inserted into the inner retaining spring groove 22 by automated equipment or manually, and its pre-installed state can be referred to Figure 4 .

[0038] In addition, when the retaining ring 3 is pre-installed in the inner retaining ring groove 22, the anti-slip arc segment 32 at least partially protrudes from the notch of the inner retaining ring groove 22. If the second connecting member 2 is a half-axle gear, the inner retaining ring groove 22 is formed on its inner spline 5, and the anti-slip arc segment 32 at least partially protrudes from the notch of the inner retaining ring groove 22, it can be understood that the inward bending amplitude of the anti-slip arc segment 32 should ensure that its inner width is smaller than the minor diameter of the inner spline 5 of the half-axle gear. The protruding portion of the anti-slip arc segment 32 can expand into the inner retaining ring groove 22 after being pressed against by the mounting portion 11 placed in the mounting hole 21, and retract into the outer retaining ring groove 12 to cooperate with the outer retaining ring groove 12 when the mounting portion 11 is installed in place, such as Figure 2 Specifically, the anti-dropping arc segment 32 retracts into the outer retaining spring groove 12 and matches with the outer retaining spring groove 12, and can be configured such that the anti-dropping arc segment 32 matches with the bottom surface of the outer retaining spring groove 12, specifically, with a small gap.

[0039] The above technical solution is achieved by pre-installing the retaining spring 3 in the inner retaining spring groove 22, and configuring the retaining spring 3 to include a supporting arc segment 31 bent outward, so that the supporting arc segment 31 abuts against the inner retaining spring groove 22 during installation. After the mounting portion 11 enters the mounting hole 21 and abuts against the anti-slip arc segment 32, the supporting arc segment 31 can provide better support so that the retaining spring 3 expands into the inner retaining spring groove 22, thereby completing the assembly of the connecting component. The setting of this structure avoids the use of a traditional retaining spring 3 structure and a corresponding assembly method, that is, there is no need to pre-install the retaining spring 3 in the outer retaining spring groove 12, thereby avoiding the problem of assembly difficulties caused by a large amount of sagging of the retaining spring 3.

[0040] In one or more embodiments, Figure 1 As shown, the snap ring 3 also includes a transition fillet section 33, one end of which is connected to the support arc section 31 and tangent to the support arc section 31; the other end of the transition fillet section 33 is connected to the anti-slip arc 32 and tangent to the anti-slip arc section 32; that is, the transition fillet section 33 is connected between the support arc section 31 and the anti-slip arc section 32, and the two ends of the transition fillet section 33 are respectively tangent to the connected support arc section 31 and the anti-slip arc section 32. By designing the transition fillet section 33 for transition, the structural design and position arrangement of the support arc section 31 and the anti-slip arc section 32 of the snap ring 3 structure are easier, and the structure of the entire snap ring 3 is reasonable.

[0041] from Figure 1 It can be seen that as a further optimization, the number of supporting arc segments 31, anti-slip arc segments 32 and transition rounded corner segments 33 are all multiple, and the multiple supporting arc segments 31 and the multiple anti-slip arc segments 32 are alternately arranged and connected in sequence through the transition rounded corner segments 33 along the circumferential direction. The structure is reasonably arranged, taking into account the support and anti-slip effects, and the force support and anti-slip effects are evenly distributed at multiple points, with good support and anti-slip effects. The retaining spring 3 has a stable structure during the expansion and contraction process, and there is no risk of falling off during use, and there is no risk of difficulty in maintenance and disassembly.

[0042] Furthermore, the number of anti-slip arc segments 32 can be set according to factors such as spline specifications and anti-slip force, and there is no specific limit; as a specific implementation provided in the present application, the number of anti-slip arc segments 32 is 3-6.

[0043] In one or more embodiments, please continue to refer to Figure 1 The retaining spring 3 also includes an opening section 34, which is formed on a supporting arc section 31; during assembly, the reverse anti-slip arc section 32 needs to be expanded, and the opening section 34 can be used to better offset the deformation of the anti-slip arc section 32 along the circumference direction after the expansion, and the structure is reasonable.

[0044] As a further optimization, Figure 1 It can be seen that the two sides of the opening section 34 are respectively provided with partial supporting arc sections 31 ; the partial supporting arc sections 31 can play a certain guiding role when the retaining spring 3 expands and contracts in the inner retaining spring groove 22 , and the movement stability of the retaining spring 3 is better.

[0045] In one or more embodiments, the first connecting member 1 is a drive shaft, the mounting portion 11 is a drive shaft moving joint, the outer peripheral surface of the drive shaft moving joint is provided with an external spline 4, and an external retaining ring groove 12 is formed on the external spline 4; the second connecting member 2 is a differential half-shaft gear, and an internal spline 5 corresponding to the external spline 4 is provided in the mounting hole 21, and the internal retaining ring groove 22 is formed on the internal spline 5.

[0046] In one or more embodiments, the supporting arc segment 31, the anti-slip arc segment 32 and the transition fillet segment 33 have the same ring width size; please refer to Figures 1 to 3 The inner retaining spring groove 22 is a rectangular ring groove, and the bottom diameter of the inner retaining spring groove 22 is larger than the sum of the major diameter of the outer spline 4 and twice the ring width. If the bottom diameter of the inner retaining spring groove 22 is a, the major diameter of the outer spline 4 is b, and the ring width is c, then a>(b+2c) can be satisfied; this structure allows the retaining spring 3 to be fully expanded to the bottom diameter of the inner retaining spring groove 22 of the half-shaft gear during assembly, and ensures that the outer spline 4 on the driving shaft moving section can be inserted and passed normally, avoiding the generation of assembly resistance.

[0047] In one or more embodiments, see Figure 5 , a chamfered structure 6 is formed at the outer end of the driving shaft moving joint. In this embodiment, a chamfered structure 6 with a guiding function is designed at the spline head of the driving shaft moving joint. The chamfered structure 6 can be a sharp chamfer, and the minor diameter after chamfering can be slightly smaller than the width of the anti-slip circular arc section 32 of the retaining spring 3 (which can be understood as the minimum diameter of the retaining spring 3). In this way, during the assembly process, the chamfered structure 6 contacts the retaining spring 3 and presses against the retaining spring 3 to expand, and the external spline 4 can pass through the anti-slip circular arc section 32 of the retaining spring 3 more easily and smoothly, reducing the assembly resistance and facilitating the assembly.

[0048] In one or more embodiments, please continue to refer to Figure 5 The outer retaining ring groove 12 is a trapezoidal annular groove, and the outer retaining ring groove 12 has an outer groove wall 121 (right groove wall) near the outer end of the drive shaft moving section and an inner groove wall 122 (left groove wall) opposite to the outer groove wall 121. The inner groove wall 122 is perpendicular to the bottom surface of the outer retaining ring groove 12, and the outer groove wall 121 extends obliquely from the bottom surface of the outer retaining ring groove 12 to a direction away from the inner groove wall 122. In this embodiment, Figure 5 As shown, at the rear of the chamfered structure 6 of the head of the external spline 4 ( Figure 5 The left end of the outer retaining spring groove 12 can be provided with an outer retaining spring groove 12 structure, and the outer retaining spring groove 12 can be a trapezoidal retaining spring groove, and the bottom diameter of the outer retaining spring groove 12 is equivalent to or slightly smaller than the minor diameter of the external spline 4; the inner groove wall 122 is a straight edge structure, which contacts with the retaining spring 3 after assembly to prevent the driving shaft from moving to the left; the outer groove wall 121 is a beveled edge structure, which contacts with the retaining spring 3 after assembly to prevent the driving shaft from moving to the right. The beveled edge structure can also ensure that the driving shaft moving section can be disassembled normally when it is subjected to a certain axial pulling force to the left, and the retaining spring 3 structure will not be damaged. The structure is reasonable and the driving shaft is easy to disassemble and assemble.

[0049] During the assembly process, first, the retaining spring 3 is pre-installed in the inner retaining spring groove 22 of the axle gear, and the outer spline 4 of the drive shaft moving section is inserted into the inner spline 5 of the axle gear. At this time, the matching length of the two is relatively long, and the centering effect is good; the drive shaft is pushed hard, and the chamfered structure 6 of the head (outer end) of the outer spline 4 of the drive shaft moving section can contact and squeeze the anti-slip arc section 32 of the retaining spring 3, so that the retaining spring 3 expands radially into the inner retaining spring groove 22. Under the support of the inner retaining spring groove 22 of the axle gear, the opening of the retaining spring 3 is reduced, and the outer spline 4 of the drive shaft moving section can smoothly pass through the retaining spring 3 and continue to move. The retaining spring 3 shrinks into place when it moves to the position of the outer retaining spring groove 12 of the drive shaft. Since the outer retaining spring groove 12 of the drive shaft is designed as a trapezoidal structure, it cooperates with the inner retaining spring groove 22 and the retaining spring 3 of the axle gear, so that the axial limit function of the drive shaft can be realized, and normal disassembly can be satisfied at the same time.

[0050] The second aspect of the present application provides a drive axle, please refer to Figures 2 to 5 , may include the above-mentioned connecting components.

[0051] A third aspect of the present application provides a vehicle that may include the above-mentioned drive axle, and the vehicle includes but is not limited to an electric vehicle.

[0052] The structure in the above embodiment optimizes the chamfer structure of the outer end of the drive shaft, and designs a trapezoidal outer retaining ring groove structure. Since the retaining ring is installed in the inner retaining ring groove of the side gear, there is no drooping effect, which can solve the assembly difficulty caused by the traditional structure. At the same time, in the traditional structure, a sharp chamfer is usually set at the outer end of the side gear to ensure a smaller assembly resistance. The chamfer width is usually too large, resulting in a reduction in the internal spline width of the side gear and a reduction in the spline strength. The present structure can increase the spline matching length and further increase the spline strength by eliminating the outer end guide chamfer structure of the side gear. Before the compression and deformation of the circlip in the traditional structure, only part of the splines on one side of the circlip groove of the outer spline head of the drive shaft cooperate with the splines at the chamfer of the outer end of the axle gear. The cooperation distance is short and the centering effect is poor. When workers assemble with force, there are problems such as deviation or falling off, which easily cause assembly abnormality or assembly difficulty. However, in this structure, by pre-installing the circlip in the inner circlip groove, the outer spline of the drive shaft moving section and the inner spline of the axle gear have a longer cooperation length during the assembly process, and the centering effect is good, without the risk of assembly abnormality or assembly difficulty. Figure 1 As shown, the retaining spring is also similar to a petal shape. This structure adopts a multi-point uniformly distributed force anti-detachment structure, which has a good anti-detachment effect and a stable pull-out force. There is no risk of falling off during use and no risk of difficulty in maintenance and disassembly.

[0053] It should be understood that the orientations or positional relationships indicated by the terms "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0054] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0055] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means 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 this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0057] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A connection assembly, characterized in that include: The first connecting member has a mounting portion, and an outer retaining ring groove is formed on the outer peripheral surface of the mounting portion; A second connecting member has a mounting hole for the mounting portion to be placed therein, an inner retaining spring groove corresponding to the outer retaining spring groove being formed on an inner circumferential surface of the mounting hole; and The retaining ring comprises a supporting arc segment and an anti-slipping arc segment; the supporting arc segment abuts against the inner retaining ring groove when the retaining ring is pre-installed in the inner retaining ring groove, and the anti-slipping arc segment at least partially protrudes from the notch of the inner retaining ring groove; the protruding part of the anti-slipping arc segment can expand into the inner retaining ring groove after being abutted by the mounting part placed in the mounting hole, and retract into the outer retaining ring groove to cooperate with the outer retaining ring groove when the mounting part is installed in place.

2. The connection assembly according to claim 1, characterized in that: The retaining spring also includes a transition fillet segment, one end of which is connected to the supporting arc segment and tangent to the supporting arc segment; the other end of the transition fillet segment is connected to the anti-slip arc and tangent to the anti-slip arc segment.

3. The connection assembly according to claim 2, characterized in that: The number of the supporting arc segments, the anti-slipping arc segments and the transition rounded corner segments are all multiple, and the multiple supporting arc segments and the multiple anti-slipping arc segments are alternately arranged and connected in sequence through the transition rounded corner segments along the circumferential direction.

4. The connection assembly according to any one of claims 1 to 3, characterized in that: The clamping spring also includes an opening section, and the opening section is formed on one of the supporting arc sections.

5. The connection assembly according to claim 4, characterized in that: Both sides of the opening section are respectively provided with a portion of the supporting arc section.

6. The connection assembly according to claim 2 or 3, characterized in that: The first connecting member is a drive shaft, the mounting portion is a drive shaft moving joint, the outer peripheral surface of the drive shaft moving joint is provided with an external spline, and the external retaining ring groove is formed on the external spline; the second connecting member is a differential half-shaft gear, the mounting hole is provided with an internal spline corresponding to the external spline, and the internal retaining ring groove is formed on the internal spline.

7. The connection assembly according to claim 6, characterized in that: The supporting arc section, the anti-slip arc section and the transition fillet section have the same ring width size; the inner retaining ring groove is a rectangular ring groove, and the bottom diameter size of the inner retaining ring groove is larger than the sum of the major diameter size of the external spline and twice the ring width size.

8. The connection assembly according to claim 6, characterized in that: The outer end of the driving shaft moving section is formed with a chamfered structure; and / or, The outer retaining ring groove is a trapezoidal annular groove having an outer groove wall close to the outer end of the drive shaft movable section and an inner groove wall opposite to the outer groove wall, the inner groove wall being perpendicular to the bottom surface of the outer retaining ring groove, and the outer groove wall extending obliquely from the bottom surface of the outer retaining ring groove in a direction away from the inner groove wall.

9. A drive axle, characterized in that: The invention comprises a connection assembly as claimed in any one of claims 1 to 8.

10. A vehicle, characterized in that: Comprising the drive axle as claimed in claim 9.

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