Universal joint structure, constant-speed drive shaft and vehicle

Abstract

The utility model provides a universal joint structure, constant velocity drive axle and vehicle, the universal joint structure includes: inner ring and outer ring, outer ring is sleeved outside the inner ring, and the rolling structure is provided between inner ring and outer ring to make outer ring can rotate relative to inner ring; the sliding sleeve is arranged on the inner side of the inner ring and used for being connected with a transmission shaft; and the sliding structure is arranged between the inner ring and the sliding sleeve, and the sliding structure can enable the inner ring and the sliding sleeve to relatively slide in the axial direction. Circumferential rotation between the inner ring and the outer ring is achieved through the rolling structure, namely swing angle adjustment is achieved, and meanwhile the sliding sleeve and the inner ring can be subjected to position adjustment in the axial direction through the sliding structure. Therefore, the universal joint structure can achieve large-amplitude swing adjustment and axial adjustment at the same time, and meanwhile appearance envelope is not increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to transmission component technical field, concretely relates to universal joint structure, constant velocity drive axle and vehicle. BACKGROUND

[0002] Constant velocity drive axle is the important transmission component of car, and is connected on the wheel and differential respectively at both ends, realizes the effect of power transmission to the wheel. Among them, constant velocity drive axle and wheel are connected through fixed ball cage universal joint, and fixed ball cage universal joint only has the function of circumferential swing, does not have axial movement function, thus makes the overall axial adjustment ability of constant velocity drive axle is limited, is easy to make the vehicle produce yaw and shake.

[0003] In order to solve the problem, some constant velocity drive axles in the prior art are provided with ball spline shaft in the middle of transmission shaft, so that the transmission shaft has the function of stretching and retracting. But this structure makes the overall envelope of constant velocity drive axle larger, which is easy to occupy the space of other components and is not conducive to the miniaturization design of the vehicle. SUMMARY

[0004] Therefore, the utility model provides a kind of universal joint structure, constant velocity drive axle and vehicle to solve the problem of poor axial adjustment ability and large envelope of constant velocity drive axle in the prior art.

[0005] In a first aspect, the utility model provides a kind of universal joint structure, comprising: inner ring and outer ring, outer ring is set in the outer ring of inner ring, and there is rolling structure between inner ring and outer ring, to enable outer ring to rotate relative to inner ring;Sleeve, set in the inner side of inner ring, sleeve is used to be connected with transmission shaft;Sliding structure, it is set between inner ring and sleeve, and sliding structure can make inner ring and sleeve slide relatively in axial direction.

[0006] Optionally, the sliding structure includes: sliding groove, set on the inner surface of inner ring and / or set on the outer surface of sleeve, and the sliding groove extends along the axial direction;At least one ball is set in the sliding groove, and the two sides of the ball are respectively in contact with inner ring and sleeve.

[0007] Optionally, the sliding groove includes first groove body and second groove body, the first groove body is set on the inner surface of inner ring, and the second groove body is set on the outer surface of sleeve, the first groove body and the second groove body are oppositely arranged, one side of the ball is located in the first groove body, and the other side of the ball is located in the second groove body.

[0008] Optionally, one end of the first groove body penetrates the first end surface of the inner ring, and one end of the second groove body penetrates the second end surface of the sleeve, wherein the first end surface and the second end surface are opposite.

[0009] Optionally, the outer ring comprises a ball cage and a shaft body connected to the ball cage, and the universal joint structure further comprises an elastic reset member arranged in the ball cage, one end of the elastic reset member abuts against the bottom of the inner wall of the ball cage, and the other end of the elastic reset member is used for abutting against the end face of the transmission shaft.

[0010] In a second aspect, the utility model also provides a constant velocity drive shaft, including transmission shaft and the universal joint structure of setting in the both ends of transmission shaft, at least one universal joint structure is the universal joint structure above.

[0011] Optionally, the end of the transmission shaft is provided with a first tooth profile, and the inner surface of the sliding sleeve is provided with a second tooth profile, and the first tooth profile and the second tooth profile are engaged.

[0012] Optionally, a positioning shaft shoulder is arranged on the outer circumferential surface of the end of the transmission shaft, the positioning shaft shoulder is used for cooperating with the first end of the sliding sleeve, the constant velocity drive shaft further comprises a limiting ring, the limiting ring is detachably arranged on the outer circumferential surface of the end of the transmission shaft, and the limiting ring is arranged in the interval with the positioning shaft shoulder, and the limiting ring is used for cooperating with the second end of the sliding sleeve.

[0013] Optionally, the two universal joint structures are the universal joint structure in any one of the above technical solutions, and the universal joint structure is a fixed ball cage universal joint.

[0014] In a third aspect, the utility model also provides a vehicle, comprising the universal joint structure above, or comprising the constant velocity drive shaft above.

[0015] By the technical scheme of the utility model, the inner ring and the outer ring are circumferentially rotated through the rolling structure, that is, the swing angle adjustment is realized, and simultaneously, the sliding structure enables the sliding sleeve and the inner ring to be positionally adjusted in the axial direction.Therefore, the universal joint structure can realize the swing adjustment and the axial adjustment simultaneously, and simultaneously, the appearance envelope is not increased.Therefore, the technical scheme of the utility model solves the problems of poor axial adjustment capability and large appearance envelope of the constant velocity drive shaft in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the drawings needed to be used in the specific embodiment or the prior art description will be briefly introduced as follows, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating creative labor.

[0017] Figure 1 The structure schematic diagram of the constant velocity drive shaft of the utility model is shown;

[0018] Figure 2 The structure schematic diagram of the constant velocity drive shaft of the utility model is shown; Figure 1A cross-sectional view of the joint structure of the intermediate speed drive shaft;

[0019] Figure 3 An enlarged view of the sliding structure is shown Figure 2 An enlarged view of the sliding structure is shown

[0020] Figure 4 An enlarged view of the sliding structure is shown Figure 2 An enlarged view of the sliding structure is shown

[0021] Figure 5 An enlarged view of the sliding structure is shown Figure 4 An enlarged view of the sliding structure is shown

[0022] Figure 6 An enlarged view of the sliding structure is shown Figure 2 An enlarged view of the sliding structure is shown

[0023] Figure 7 An enlarged view of the sliding structure is shown Figure 2 An enlarged view of the sliding structure is shown

[0024] Figure 8 An enlarged view of the sliding structure is shown Figure 2 An enlarged view of the sliding structure is shown

[0025] Figure 9 An enlarged view of the sliding structure is shown Figure 8 An enlarged view of the sliding structure is shown

[0026] BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 10, inner ring; 11, first end face;

[0028] 20, outer ring; 21, ball cage; 22, shaft body;

[0029] 30, rolling structure;

[0030] 40, sliding sleeve; 41, second end face; 42, second toothed portion;

[0031] 50, sliding structure; 51, sliding groove; 511, first groove body; 512, second groove body; 52, ball;

[0032] 60, elastic return member;

[0033] 100, transmission shaft; 101, first toothed portion; 102, positioning shaft shoulder;

[0034] 200, joint structure;

[0035] 300, limiting ring. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0037] The constant velocity drive shaft is an important transmission component of the automobile, and is connected at two ends to the wheel and the differential respectively to realize the effect of transmitting power to the wheel. Among them, the conventional structure is that the constant velocity drive shaft is connected with the wheel through the fixed ball cage universal joint, and the constant velocity drive shaft is connected with the differential through the telescopic ball cage universal joint. The fixed ball cage universal joint only has the function of circumferential swing and does not have the function of axial movement, and the axial telescopic amount of the telescopic ball cage universal joint is also limited, so that the overall axial adjustment capability of the constant velocity drive shaft is limited, and the vehicle is prone to yaw and shaking.

[0038] In order to solve this problem, some constant velocity drive shafts in the prior art are provided with a ball spline shaft in the middle of the transmission shaft to realize the telescopic function of the transmission shaft. However, this structure makes the overall appearance of the constant velocity drive shaft larger, easily occupies the space of other components, and is not conducive to the miniaturization design of the vehicle.

[0039] Therefore, the applicant provides a universal joint structure, and a constant velocity drive shaft and a vehicle applying the universal joint structure, as follows.

[0040] As shown in Figure 1 and Figure 2 , the embodiment of the universal joint structure according to the present application includes an inner ring 10, an outer ring 20, a sliding sleeve 40 and a sliding structure 50. The outer ring 20 is sleeved outside the inner ring 10, and a rolling structure 30 is arranged between the inner ring 10 and the outer ring 20 to enable the outer ring 20 to rotate relative to the inner ring 10. The sliding sleeve 40 is arranged on the inner side of the inner ring 10, and is used to be connected with a transmission shaft 100. The sliding structure 50 is arranged between the inner ring 10 and the sliding sleeve 40, and enables the inner ring 10 and the sliding sleeve 40 to slide relative to each other in the axial direction.

[0041] By using the technical scheme of the embodiment, the inner ring 10 and the outer ring 20 are enabled to rotate circumferentially through the rolling structure 30, that is, to realize swing angle adjustment, and at the same time, the sliding structure 50 enables the sliding sleeve 40 and the inner ring 10 to be adjusted in position in the axial direction. Therefore, the universal joint structure can realize large swing adjustment and axial adjustment at the same time, and does not increase the envelope. Therefore, the technical scheme of the embodiment solves the problems of poor axial adjustment capability and large envelope of the constant velocity drive shaft in the prior art.

[0042] First of all, it needs to be pointed out that in the transmission structure in various fields, the transmission process needs to be swing adjusted and axially adjusted, and the universal joint structure of the embodiment can be used. The following will be illustrated by taking the application of the universal joint structure of the embodiment in the constant velocity drive shaft of the automobile as an example, but the following content should not be understood as the universal joint structure of the embodiment can only be applied in the constant velocity drive shaft.

[0043] Firstly, as shown in Figure 2 , Figure 4 and Figure 5 , in the technical solution of the embodiment, the universal joint structure includes an inner ring 10 and an outer ring 20, both of which are annular members, and the inner diameter of the outer ring 20 is larger than the outer diameter of the inner ring 10, so that the outer ring 20 can be sleeved on the outer side of the inner ring 10. The rolling structure 30 is arranged in the gap between the outer ring 20 and the inner ring 10, and by arranging the rolling structure 30, when one of the inner ring 10 and the outer ring 20 rotates, the other can be driven to rotate synchronously. At the same time, the outer ring 20 can swing in the circumferential direction relative to the inner ring 10, that is, the universal transmission function is realized.

[0044] In the embodiment, the inner ring 10 is a driving member, and the outer ring 20 is a driven member.

[0045] It should be noted that the inner and outer surfaces of the inner ring 10 in the embodiment refer to the surface of the inner side annular surface of the inner ring 10 and the surface of the outer side annular surface of the inner ring 10, respectively. Correspondingly, the inner and outer surfaces of the outer ring 20 in the embodiment refer to the surface of the inner side annular surface of the outer ring 20 and the surface of the outer side annular surface of the outer ring 20, respectively.

[0046] Further, as shown in Figure 4 and Figure 5 , the rolling structure 30 includes a plurality of universal balls, and the plurality of universal balls are arranged in the circumferential direction at intervals. The rolling structure 30 further includes a retaining ring in the shape of a ring, and the retaining ring is provided with a plurality of retaining holes. The plurality of universal balls are arranged one-to-one in the plurality of retaining holes. At the same time, the outer surface of the inner ring 10 and the inner surface of the outer ring 20 are both provided with a raceway, and the two sides of the universal ball are matched with the raceway of the inner ring 10 and the raceway of the outer ring 20, respectively. The structure of the rolling ball and the retaining ring is a conventional technology, so its principle is not described in detail.

[0047] Further, as shown in Figure 5 and Figure 6 , the universal joint structure further includes a sliding sleeve 40. The sliding sleeve 40 is an annular member, and the sliding sleeve 40 is arranged on the inner side of the inner ring 10, that is, the inner ring 10 is sleeved on the outside of the sliding sleeve 40. The sliding sleeve 40 is used to be connected with the transmission shaft 100, and the two are fixedly connected in the axial and circumferential directions, and the transmission shaft 100 can drive the sliding sleeve 40 to rotate when rotating. And as Figure 3As shown, a sliding structure 50 is arranged between the sliding sleeve 40 and the inner ring 10, and the sliding structure 50 enables the sliding sleeve 40 and the inner ring 10 to slide relative to each other along the axial direction.

[0048] In this way, the gimbal structure not only has the swing adjustment function, but also has the axial adjustment function. Meanwhile, the sliding structure 50 is integrated in the gimbal structure (i.e., between the inner ring 10 and the sliding sleeve 40), and thus does not increase the structural envelope.

[0049] It should be noted that the inner and outer surfaces of the sliding sleeve 40 in the embodiment refer to the surface of the inner annular surface of the sliding sleeve 40 and the surface of the outer annular surface of the sliding sleeve 40, respectively.

[0050] It should be noted that the axial direction refers to the axial direction of the inner ring 10, and those skilled in the art can understand that the direction is also the axial direction of the transmission shaft 100.

[0051] It should also be noted that the sliding sleeve 40 and the inner ring 10 are also relatively fixed in the circumferential direction, and the sliding sleeve 40 can drive the inner ring 10 to rotate when the sliding sleeve 40 rotates. That is, the connection mode of the sliding sleeve 40 and the inner ring 10 is that the two are fixed in the circumferential direction and the positions are adjustable in the axial direction.

[0052] Therefore, the transmission path of the gimbal structure of the embodiment is: the transmission shaft 100-the sliding sleeve 50-the inner ring 10-the rolling structure 30-the outer ring 20.

[0053] As shown in Figure 2 and Figure 3 The sliding structure 50 includes a sliding groove 51 and a ball 52. The sliding groove 51 is arranged on the inner surface of the inner ring 10 and / or on the outer surface of the sliding sleeve 40, and the sliding groove 51 extends along the axial direction. The ball 52 is at least one, and the ball 52 is arranged in the sliding groove 51, and the two sides of the ball 52 abut against the inner ring 10 and the sliding sleeve 40, respectively.

[0054] Specifically, the sliding groove 51 mainly plays two roles, one is to accommodate and position the ball 52, and the other is to guide the movement of the ball 52. The two sides of the ball 52 abut against the inner ring 10 and the sliding sleeve 40, respectively, so that the sliding between the inner ring 10 and the sliding sleeve 40 is smoother.

[0055] From Figure 4 It can be seen that the extension direction of the sliding groove 51 is parallel to the axial direction of the inner ring 10 in the embodiment. Therefore, when the inner ring 10 and the sliding sleeve 40 move relative to each other in the axial direction, the ball 52 can move in the sliding groove 51 along the axial direction, thereby reducing the friction between the inner ring 10 and the sliding sleeve 40.

[0056] Further, the sliding grooves 51 in the embodiment are provided in plurality, and the plurality of sliding grooves 51 are uniformly distributed along the circumference of the inner ring 10, and the number of the rolling balls 52 provided in each sliding groove 51 is the same, so as to ensure that the overall gimbal structure keeps dynamic balance.

[0057] In combination Figure 8 It can be seen that the number of the sliding grooves 51 in the embodiment is six, and the adjacent sliding grooves 51 are arranged at an angle of 60°. Of course, the specific number of the sliding grooves 51 can be adjusted according to actual needs by those skilled in the art.

[0058] Optionally, the cross section of the sliding groove 51 is in a circular arc structure, so that the rolling ball 52 is better embedded in the sliding groove 51.

[0059] Further, a plurality of rolling balls 52 are provided in each sliding groove 51 in the embodiment, the plurality of rolling balls 52 have strong bearing capacity, and can make the sliding between the inner ring 10 and the sliding sleeve 40 more smooth. In the embodiment, the plurality of rolling balls 52 do not completely fill the sliding groove 51, so that the rolling ball 52 still has a certain rolling space in the sliding groove 51. In some unshown embodiments, the rolling ball 52 can also fill the sliding groove 51.

[0060] In some unshown embodiments, if the thickness of the inner ring 10 and the sliding sleeve 40 is small, and in the transmission occasion where the bearing capacity requirement is not high, it is also a feasible embodiment that only one rolling ball 52 is provided in one sliding groove 51.

[0061] Further, the sliding groove 51 described above can be provided in the following manners:

[0062] 1. The sliding groove 51 is provided on the inner surface of the inner ring 10, the rolling ball 52 is located in the sliding groove 51, and the part of the rolling ball 52 protruding from the sliding groove 51 abuts against the outer surface of the sliding sleeve 40;

[0063] 2. The sliding groove 51 is provided on the outer surface of the sliding sleeve 40, the rolling ball 52 is located in the sliding groove 51, and the part of the rolling ball 52 protruding from the sliding groove 51 abuts against the inner surface of the inner ring 10;

[0064] 3. The inner surface of the inner ring 10 and the outer surface of the sliding sleeve 40 are both provided with the sliding groove 51, and this setting manner further includes the following two setting manners:

[0065] I. The sliding groove 51 on the inner ring 10 and the sliding groove 51 on the sliding sleeve 40 are arranged in a circumferential staggered manner, at this time, the part of the rolling ball 52 in the sliding groove 51 on the inner ring 10 protruding from the sliding groove 51 abuts against the outer surface of the sliding sleeve 40, and the part of the rolling ball 52 in the sliding groove 51 on the sliding sleeve 40 protruding from the sliding groove 51 abuts against the inner surface of the inner ring 10;

[0066] The sliding groove 51 of the inner ring 10 and the sliding groove 51 of the sliding sleeve 40 are arranged in correspondence in the circumferential direction, at this time, the sliding groove 51 of the inner ring 10 and the sliding groove 51 of the sliding sleeve 40 jointly enclose a channel structure with a circular cross section, and the ball 52 is arranged in the channel.

[0067] As shown in Figure 2 to Figure 6 , and Figure 8 and Figure 9 , the sliding groove 51 of the embodiment adopts the second arrangement mode of the above-mentioned mode 3, and the specific structure is as follows:

[0068] From Figure 3 and Figure 9 , it can be seen that the sliding groove 51 in the embodiment includes a first groove body 511 and a second groove body 512, the first groove body 511 is arranged on the inner surface of the inner ring 10, the second groove body 512 is arranged on the outer surface of the sliding sleeve 40, and the first groove body 511 and the second groove body 512 are oppositely arranged. One side of the ball 52 is located in the first groove body 511, and the other side of the ball 52 is located in the second groove body 512.

[0069] As described above, the openings of the first groove body 511 and the second groove body 512 are oppositely arranged, when the sliding sleeve 40 is installed in the inner ring 10, the first groove body 511 and the second groove body 512 jointly enclose a channel with a circular cross section, the inner diameter of the channel is matched with the outer diameter of the ball 52, and the ball 52 is arranged in the channel.

[0070] The structure of the first groove body 511 and the second groove body 512 in the embodiment has the following advantages:

[0071] 1. The two sides of the ball 52 are respectively wrapped in the first groove body 511 and the second groove body 512, from Figure 9 it can be seen that even if the ball 52 is arranged, the inner surface of the inner ring 10 and the outer surface of the sliding sleeve 40 are basically in a state of adhesion, and the structural cooperation is more compact. That is, even if the ball is arranged between the inner ring 10 and the sliding sleeve 40, the radial size of the universal joint structure is not additionally increased;

[0072] 2. Combined with Figure 8 and Figure 9 , it can be seen that when the transmission shaft 100 rotates, the sliding sleeve 40 is driven to rotate, the torque of the sliding sleeve 40 is transmitted to the ball 52 by the side wall of the second groove body 512, and then the torque is transmitted to the first groove body 511 by the ball 52 and drives the inner ring 10 to rotate. Therefore, in the embodiment, the ball 52 not only plays a function of adjusting the axial position of the inner ring 10 and the sliding sleeve 40, but also plays a role of bearing torque transmission power.

[0073] As shown in Figure 3 , Figure 5 and Figure 6As shown, in the technical solution of the embodiment, one end of the first groove body 511 penetrates the first end surface 11 of the inner ring 10, and one end of the second groove body 512 penetrates the second end surface 41 of the sleeve 40, wherein the first end surface 11 and the second end surface 41 are opposite to each other.

[0074] It should be noted that the above-mentioned end surface refers to a plane perpendicular to the axis. Since the inner ring 10 and the sleeve 40 are both annular members, they both have two opposite end surfaces.

[0075] It should be further noted that "the first end surface 11 and the second end surface 41 are opposite to each other" means that, when the inner ring 10 and the sleeve 40 are assembled, the first end surface 11 of the inner ring 10 is opposite to the second end surface 41 of the sleeve 40. Taking the case that the two are horizontally lying (the axis is horizontal) as an example, the first end surface 11 of the inner ring 10 is the left end surface thereof, and the second end surface 41 of the sleeve 40 is the right end surface thereof; or, the first end surface 11 of the inner ring 10 is the right end surface thereof, and the second end surface 41 of the sleeve 40 is the left end surface thereof.

[0076] Such an arrangement is to facilitate the installation of the ball 52. In combination with the above-mentioned arrangement of the first groove body 511 and the second groove body 512, the ball 52 can be installed in the first groove body 511 and the second groove body 512 in a simple and convenient manner. Figure 3 And the direction shown in Figure 3 is described. The left end surface of the inner ring 10 is the first end surface 11, and the right end surface of the sleeve 40 is the second end surface 41. When assembling, the ball 52 is first placed in the second groove body 512, and then the sleeve 40 is arranged in the inner ring 10 from left to right. The part of the ball 52 protruding from the second groove body 512 enters the first groove body 511 through the opening formed by the first groove body 511 at the first end surface 11. Until the inner ring 10 and the sleeve 40 are assembled in place, the ball 52 is enclosed in the channel formed by the first groove body 511 and the second groove body 512.

[0077] In an embodiment not shown, referring to the direction shown in Figure 3 , the right end surface of the inner ring 10 can be the first end surface 11, and the left end surface of the sleeve 40 can be the second end surface 41. In this embodiment, the sleeve 40 is installed on the inner ring 10 from right to left.

[0078] As shown in Figure 2 and Figure 5 , in the technical solution of the embodiment, the outer ring 20 includes a ball cage body 21 and a shaft body 22 connected to the ball cage body 21. The universal joint structure further includes an elastic reset member 60 arranged in the ball cage body 21, one end of the elastic reset member 60 abuts against the bottom of the inner wall of the ball cage body 21, and the other end of the elastic reset member 60 is used to abut against the end surface of the transmission shaft 100.

[0079] Specifically, the universal joint structure in the embodiment is a ball cage type universal joint, which can be a fixed ball cage universal joint or a telescopic ball cage universal joint.

[0080] Further, when the universal joint structure is a fixed ball cage universal joint, not only the swing adjustment function is provided, but also the axial adjustment function is provided. When the universal joint structure is a telescopic ball cage universal joint, in the case that the axial telescopic function is provided, the axial telescopic adjustment amount is further improved by the sliding structure 50.

[0081] Further, the elastic return member 60 is used to buffer and limit the axial movement of the sliding sleeve 40. Specifically, since the transmission shaft 100 and the sliding sleeve 40 are fixedly arranged in the axial direction, the elastic return member 60 can also exert a pushing force on the sliding sleeve 40 away from the ball cage body 21.

[0082] Therefore, the elastic return member 60 in the embodiment can not only buffer the axial movement of the transmission shaft 100, but also, in combination with the sliding structure 50, can further improve the axial adjustment amount of the transmission shaft 100. Figure 2 and Figure 3 It can be seen that the pushing force of the elastic return member 60 can prevent the sliding sleeve 40 from moving too much relative to the inner ring 10 towards the bottom of the inner wall of the ball cage body 21, and prevent the second groove body 512 from being exposed too much on the inner ring 10, which can cause the rolling balls 52 to fall out.

[0083] Further preferably, the first end surface 11 of the inner ring 10 is the end surface of the inner ring 10 facing the bottom of the inner wall of the ball cage body 21, and the second end surface 41 of the sliding sleeve 40 is the end surface of the sliding sleeve 40 away from the bottom of the inner wall of the ball cage body 21.

[0084] Since the inner ring 10 is a fixed component, the elastic return member 60 can exert an elastic force on the sliding sleeve 40, so that the sliding sleeve 40 is pressed tightly on the inner ring 10.

[0085] Optionally, the elastic return member 60 is a coil spring.

[0086] As shown in Figure 1 and Figure 2 The application also provides an equal speed driving shaft, and the equal speed driving shaft according to the embodiment of the application includes a transmission shaft 100 and a universal joint structure 200 arranged at both ends of the transmission shaft 100, and at least one universal joint structure 200 is the universal joint structure described above.

[0087] Specifically, in the equal speed driving shaft of the embodiment, the sliding sleeve 40 and the sliding structure 50 of the above embodiment are arranged in at least one universal joint structure 200, so that the axial adjustment capability of the equal speed driving shaft as a whole is enhanced.

[0088] In the technical scheme of the embodiment, the two universal joint structures 200 at the two ends of the constant velocity drive shaft are the universal joint structures of the above embodiment, that is, the two universal joint structures 200 are provided with the sliding sleeve 40 and the sliding structure 50. And the two universal joint structures are fixed ball cage universal joints.

[0089] In this way, the constant velocity drive shaft as a whole has a large swing angle adjustment range. According to the applicant's test, the swing angle adjustment range of the constant velocity drive shaft of the embodiment can be increased from the conventional 26° to 45°. At the same time, since the two fixed ball cage universal joints are provided with the sliding sleeve 40 and the sliding structure 50, the constant velocity drive shaft as a whole also has a large axial adjustment capability, and it is not necessary to provide a ball spline on the transmission shaft 100, thereby not increasing the envelope of the constant velocity drive shaft.

[0090] In some unshown embodiments, the two universal joint structures 200 are provided with the sliding sleeve 40 and the sliding structure 50, but the forms of the two universal joint structures 200 can be adjusted as follows: one universal joint structure 200 is a fixed ball cage universal joint, and the other universal joint structure 200 is a telescopic ball cage universal joint; or, both of the two universal joint structures 200 are telescopic ball cage universal joints.

[0091] In some unshown embodiments, the forms of the two universal joint structures 200 can be as follows: one is provided with the sliding sleeve 40 and the sliding structure 50, and the other is not provided with the sliding sleeve 40 and the sliding structure 50.

[0092] Further, in the above unshown embodiments, the universal joint structure 200 provided with the sliding sleeve 40 and the sliding structure 50 can be a universal joint structure 200 connected with a differential, or a universal joint structure 200 connected with a wheel.

[0093] Further, in the above unshown embodiments, the universal joint structure 200 provided with the sliding sleeve 40 and the sliding structure 50 can be a fixed ball cage universal joint, or a telescopic ball cage universal joint. Correspondingly, the universal joint structure 200 not provided with the sliding sleeve 40 and the sliding structure 50 can be a fixed ball cage universal joint, or a telescopic ball cage universal joint.

[0094] Those skilled in the art can flexibly select the number of the universal joint structures 200 provided with the sliding sleeve 40 and the sliding structure 50, and the specific forms of the universal joint structures 200 according to the actual needs of swing angle adjustment and axial adjustment in the transmission environment.

[0095] As Figure 6 to Figure 9As shown, in the technical solution of this embodiment, a first toothed portion 101 is provided at the end of the transmission shaft 100 , and a second toothed portion 42 is provided on the inner surface of the sliding sleeve 40 , and the first toothed portion 101 and the second toothed portion 42 are meshed.

[0096] With this arrangement, when the transmission shaft 100 rotates, the sliding sleeve 40 can be driven to rotate synchronously.

[0097] Furthermore, both ends of the transmission shaft 100 are provided with a first toothed portion 101 . In the above embodiment where only one universal joint structure 200 is provided without a sleeve 40 , the first toothed portion 101 at the corresponding end of the transmission shaft 100 meshes with the internal teeth of the inner ring 10 .

[0098] like Figure 2 、 Figure 3 and Figure 7 As shown, in the technical solution of this embodiment, a positioning shoulder 102 is provided on the outer peripheral surface of the end of the transmission shaft 100, and the positioning shoulder 102 is used to cooperate with the first end of the sleeve 40. The constant velocity drive shaft also includes a limit ring 300, which is detachably provided on the outer peripheral surface of the end of the transmission shaft 100, and the limit ring 300 is spaced apart from the positioning shoulder 102, and the limit ring 300 is used to cooperate with the second end of the sleeve 40.

[0099] Specifically, the outer diameter of the end portion of the transmission shaft 100 (i.e., the portion provided with the first toothed portion 101) is slightly reduced, thereby forming the aforementioned locating shoulder 102. An annular groove is provided on the outer circumference of the end portion of the transmission shaft 100. The annular groove is spaced apart from and located outside of the locating shoulder 102. The distance between the annular groove and the locating shoulder 102 matches the length of the sliding sleeve 40.

[0100] Furthermore, the limiting ring 300 is annular in structure and has an opening, that is, a non-closed structure. The limiting ring 300 has a certain elasticity and is used to be installed in the above-mentioned annular groove.

[0101] During assembly, the sliding sleeve 40 is first placed over the end of the transmission shaft 100, so that the first toothed portion 101 meshes with the second toothed portion 42 and the first end of the sliding sleeve 40 abuts the positioning shoulder 102. The retaining ring 300 is then positioned within the annular groove, positioned outside the second end of the sliding sleeve 40. This secures the sliding sleeve 40 to the transmission shaft 100 both circumferentially and axially.

[0102] The present application also provides a vehicle. According to an embodiment of the vehicle of the present application, the vehicle includes the above-mentioned constant velocity drive shaft.

[0103] Specifically, one end of the constant velocity drive shaft is connected to the differential, and the other end is connected to the wheels.

[0104] Optionally, the vehicle can be a fuel automobile or a new energy electric vehicle.

[0105] Of course, in addition to the constant velocity drive shaft in the vehicle, when the universal joint structure needs to be used, the universal joint structure described above can also be used.

[0106] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. A universal joint structure, characterized by, The application relates to a universal joint structure. The universal joint structure comprises: an inner ring (10) and an outer ring (20), the outer ring (20) is sleeved outside the inner ring (10), and a rolling structure (30) is arranged between the inner ring (10) and the outer ring (20) to enable the outer ring (20) to rotate relative to the inner ring (10); a sliding sleeve (40) arranged on the inner side of the inner ring (10), the sliding sleeve (40) is used for being connected with a transmission shaft (100); 2. The gimbal structure of claim 1, wherein, a sliding structure (50) arranged between the inner ring (10) and the sliding sleeve (40), the sliding structure (50) enables the inner ring (10) and the sliding sleeve (40) to slide relative to each other in the axial direction. The sliding structure (50) comprises: a sliding groove (51) arranged on the inner surface of the inner ring (10) and / or arranged on the outer surface of the sliding sleeve (40), the sliding groove (51) extends in the axial direction; 3. The gimbal structure of claim 2, wherein, at least one ball (52) arranged in the sliding groove (51), and the two sides of the ball (52) abut against the inner ring (10) and the sliding sleeve (40) respectively.

4. The gimbal structure of claim 3, wherein, The sliding groove (51) comprises a first groove body (511) arranged on the inner surface of the inner ring (10) and a second groove body (512) arranged on the outer surface of the sliding sleeve (40), the first groove body (511) and the second groove body (512) are oppositely arranged, one side of the ball (52) is located in the first groove body (511), and the other side of the ball (52) is located in the second groove body (512).

5. The gimbal structure according to any one of claims 1 to 4, characterized in that, One end of the first groove body (511) penetrates through a first end surface (11) of the inner ring (10), and one end of the second groove body (512) penetrates through a second end surface (41) of the sliding sleeve (40), wherein the first end surface (11) and the second end surface (41) are opposite to each other.

6. Constant velocity drive shaft characterized in that, The outer ring (20) comprises a ball cage body (21) and a shaft body (22) connected to the ball cage body (21), the universal joint structure further comprises an elastic reset member (60) arranged in the ball cage body (21), one end of the elastic reset member (60) abuts against the bottom of the inner wall of the ball cage body (21), and the other end of the elastic reset member (60) is used for abutting against the end surface of the transmission shaft (100).

7. Constant velocity axle as defined in claim 6 wherein, The application further relates to a transmission shaft (100) and a universal joint structure (200) arranged at both ends of the transmission shaft (100), and at least one universal joint structure (200) is the universal joint structure according to any one of claims 1 to 5. The end of the transmission shaft (100) is provided with a first tooth-shaped part (101), the inner surface of the sliding sleeve (40) is provided with a second tooth-shaped part (42), and the first tooth-shaped part (101) and the second tooth-shaped part (42) are engaged.

8. Constant velocity axle as defined in claim 6 wherein, The outer circumferential surface of the end of the transmission shaft (100) is provided with a positioning shaft shoulder (102) for cooperating with the first end of the sliding sleeve (40), and the constant velocity drive shaft further comprises a limiting ring (300) which is detachably arranged on the outer circumferential surface of the end of the transmission shaft (100) and is arranged in a spaced manner with the positioning shaft shoulder (102), and the limiting ring (300) is used for cooperating with the second end of the sliding sleeve (40).

9. Constant velocity axle according to any one of claims 6 to 8, characterized in that Both of the two universal joint structures (200) are the universal joint structure according to any one of claims 1 to 5, and the universal joint structure (200) is a fixed ball cage universal joint.

10. A vehicle characterized by comprising: The constant velocity drive shaft comprises the universal joint structure (200) according to any one of claims 1 to 5, or the constant velocity drive shaft comprises the constant velocity drive shaft according to any one of claims 6 to 9.

Images