Transmission shaft assembly and vehicle

Abstract

The transmission shaft assembly comprises a transmission shaft and a protection plate, the protection plate is located above the transmission shaft and installed on a vehicle body through an installation portion, the front portion of the transmission shaft is provided with a guide portion, the protection plate is provided with a guide groove, and the guide groove is communicated with the transmission shaft. The guide groove extends backwards from the portion close to the transmission shaft to the side of the vehicle, and when the front portion of the transmission shaft bounces upwards, the guide portion can be embedded into the guide groove to guide the front portion of the transmission shaft to slide towards the side of the vehicle with the rear portion as the center. The transmission shaft assembly is applied to the vehicle, when the vehicle is subjected to large impact force, the front portion of the transmission shaft bounces upwards, the guide portion can be embedded into the guide groove, the front portion of the transmission shaft is guided to slide towards the side of the vehicle with the rear portion as the center, and therefore the front portion of the transmission shaft can be prevented from being ejected into the vehicle, and safety of passengers in the vehicle can be effectively protected.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle parts, and in particular to a transmission shaft assembly. Meanwhile, the utility model also relates to a vehicle using the transmission shaft assembly. Background Art

[0002] The drive shaft assembly is a mechanical component that transmits power between two shafts with different axes, and can even transmit power between two shafts whose relative positions are constantly changing during operation. The drive shaft assembly plays a vital role in the vehicle. It generally includes a drive shaft and a universal joint connected to both ends of the drive shaft. The performance and quality of the drive shaft assembly directly affect the power transmission efficiency and safety of the vehicle.

[0003] In a vehicle, after the power generated by the engine passes through the main reduction gear, the drive shaft can continue to transmit the power backward to the drive wheels so that the drive wheels can operate normally. However, when the vehicle is hit, the engine and the front main reduction gear will move backward due to the collision, which may cause the drive shaft to break. The broken drive shaft may drag on the ground, causing the vehicle to overturn, or it may rise up and rush into the cockpit, seriously threatening the personal safety of the passengers. Utility Model Content

[0004] In view of this, the utility model aims to provide a transmission shaft assembly, which can prevent the transmission shaft from being pushed upward into the vehicle when the vehicle is subjected to a large impact force, thereby better protecting the safety of the occupants in the vehicle.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A transmission shaft assembly comprises a transmission shaft and a protective plate;

[0007] The protective plate is provided with a mounting portion, and the protective plate is mounted on the vehicle body through the mounting portion, and the mounted protective plate is located above the transmission shaft;

[0008] A guide portion is provided at the front of the transmission shaft, and a guide groove is provided on the protective plate. The guide groove extends from a portion close to the transmission shaft to the side and rearward of the vehicle. The front of the transmission shaft pops up, and the guide portion can be embedded in the guide groove to guide the front of the transmission shaft to slide toward the side of the vehicle with the rear as the center.

[0009] Furthermore, the transmission shaft includes a shaft tube, and a first connecting shaft and a second connecting shaft respectively connected to both ends of the shaft tube; an end of the first connecting shaft away from the shaft tube is provided with an external spline, and the external spline is used to connect to the first universal joint spline, and an end of the second connecting shaft away from the shaft tube is used to connect to the second universal joint; the guide portion is provided on the first connecting shaft, and the guide portion is arranged adjacent to the shaft tube.

[0010] Furthermore, the guide portion is integrally formed on the first connecting shaft, and a cross section of the guide portion is semicircular.

[0011] Furthermore, a first reinforcing rib is provided in the middle of the protective plate, the length direction of the first reinforcing rib is consistent with the axial direction of the transmission shaft, and the first reinforcing rib is arranged directly above the transmission shaft.

[0012] Furthermore, the guide grooves are provided on both sides of the first reinforcing rib, and the guide grooves on both sides are symmetrically arranged with respect to the first reinforcing rib.

[0013] Furthermore, a portion of the first connecting shaft close to the shaft tube is provided with a collapse structure, and the collapse structure is used to collapse and deform the transmission shaft along its own axial direction;

[0014] There are a plurality of guide grooves on each side, and the plurality of guide grooves on each side are arranged in sequence with intervals along the front-rear direction of the vehicle. The front portion of the transmission shaft pops up, and the guide portion can be embedded in one of the guide grooves.

[0015] Furthermore, a first guiding portion is provided on the first reinforcing rib, and the first guiding portion corresponds to the guiding groove one by one; the first guiding portion is used to guide the guiding portion to be embedded in the guiding groove corresponding to the first guiding portion.

[0016] Furthermore, the protective plate is provided with a plurality of arc-shaped second reinforcing ribs, and the middle portion of each of the second reinforcing ribs is bent in a direction away from the rear portion of the transmission shaft; the centers of the plurality of second reinforcing ribs are concentrically arranged, and the guide grooves are formed between any adjacent second reinforcing ribs; each of the second reinforcing ribs is provided with a second guide portion on at least one side, and the second guide portion is used to guide the guide portion to embed into the guide groove on the corresponding side.

[0017] Furthermore, the mounting portion includes a plurality of mounting holes, and the plurality of mounting holes are arranged at intervals in the circumferential direction of the protective plate; the protective plate is mounted on the vehicle body by means of mounting parts passing through each of the mounting holes.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] The drive shaft assembly described in the utility model is provided with a guide portion on the drive shaft and a guide groove on the protective plate. When the vehicle is subjected to a large impact force causing the front part of the drive shaft to bounce upward, the guide portion can be embedded in the guide groove to guide the front part of the drive shaft to slide toward the side of the vehicle with the rear part as the center, thereby preventing the front part of the drive shaft from pushing into the vehicle, and effectively protecting the safety of the occupants in the vehicle.

[0020] In addition, the transmission shaft includes a shaft tube, a first connecting shaft and a second connecting shaft. The shaft tube is arranged in the middle to reduce the total weight of the transmission shaft. The guide part is arranged on the first connecting shaft for easy processing, and the guide part and the shaft tube are arranged adjacent to each other for easy overall arrangement. The guide part is integrally formed on the first connecting shaft, and can be integrally formed by a forging process, which is convenient for processing. The cross section of the guide part is semicircular, which is conducive to reducing the resistance of the guide part in the sliding process in the guide groove, and can play a better guiding effect, which is conducive to the smooth sliding of the guide part in the guide groove.

[0021] In addition, a first reinforcing rib is provided in the middle of the protective plate. If the front part of the transmission shaft bounces upward, the first reinforcing rib can better protect the protective plate and prevent the front part of the transmission shaft from pushing into the space inside the vehicle. The length direction of the first reinforcing rib is consistent with the axial direction of the transmission shaft. Even if the transmission shaft collapses to a certain extent in its own direction, the first reinforcing rib can still better protect the protective plate, thereby preventing the front part of the transmission shaft from pushing into the space inside the vehicle. Guide grooves are provided on both sides of the first reinforcing rib, and the guide grooves on both sides are arranged symmetrically about the first reinforcing rib. If the vehicle is hit by a large impact force and the front part of the transmission shaft does not bounce upward, the guide part can be embedded in the guide groove on the side corresponding to the ejection direction, and slide along the guide groove on this side along the left and right direction of the vehicle toward the outside of the vehicle, thereby better protecting the occupants in the vehicle.

[0022] A collapse structure is provided on the first connecting shaft, and the collapse structure can bear a certain impact force, thereby reducing the impact force when the transmission shaft bounces up. The first connecting shaft after collapse and deformation can extend into the shaft tube, thereby better preventing the transmission shaft from bouncing up. At the same time, multiple guide grooves are provided on each side, and the multiple guide grooves on each side are arranged in sequence along the front-rear direction of the vehicle, so that the first connecting shaft can be embedded in different guide grooves when the axial collapse distance of the transmission shaft is different, so that even if it is subjected to different impact forces, the guiding function of the guide part and the guide groove can still be guaranteed.

[0023] At the same time, a first guide portion is provided on the first reinforcing rib, and the first guide portion corresponds to the guide groove one by one. In addition to guiding the guide portion to be embedded in the guide groove corresponding to the first guide portion, the first reinforcing rib can also better decompose the impact force, so that the component force pointing upward when the front part of the transmission shaft bounces upward is reduced, thereby reducing the possibility of the front part of the transmission shaft being pushed into the vehicle.

[0024] As for the second reinforcing ribs, the structural strength of the protective plate can be enhanced. The second reinforcing ribs are set to be in an arc shape, so that the projection of the guide groove in the horizontal direction of the vehicle is in an arc shape, so that the drive shaft can slide along the guide groove with its rear part as the center, which is beneficial to improve the reliability of the guide part and the guide groove; the second guide part provided on each second reinforcing rib is beneficial to the smooth embedding of the guide part into the guide groove corresponding to the second reinforcing rib. The second guide part can also better decompose the impact force, so that the component force pointing directly upward when the front part of the drive shaft bounces upward is reduced, thereby reducing the possibility of the front part of the drive shaft being pushed into the vehicle.

[0025] The mounting portion is set as a mounting hole, which is simple to process. Providing multiple mounting holes and mounting parts is beneficial to improving the stability of the protection plate installed on the vehicle body.

[0026] Another object of the present invention is to provide a vehicle, on which the transmission shaft assembly as described above is provided.

[0027] The vehicle of the utility model can better prevent the front part of the transmission shaft from being pushed into the vehicle by applying the aforementioned transmission shaft assembly, thereby better protecting the life safety of the passengers in the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0029] Figure 1 This is a schematic structural diagram of the transmission shaft assembly according to the first embodiment of the utility model;

[0030] Figure 2 This is a schematic structural diagram of the transmission shaft, the first universal joint, and the second universal joint assembled together according to the first embodiment of the utility model;

[0031] Figure 3 for Figure 2 Exploded diagram of

[0032] Figure 4 This is a schematic diagram of the structure of the protective plate described in Example 1 of the utility model;

[0033] Figure 5 for Figure 4 A top view of

[0034] Figure 6 For along Figure 4 Section view along line AA.

[0035] Description of reference numerals:

[0036] 1. transmission shaft; 101. shaft tube; 102. first connecting shaft; 1021. guide portion; 1022. external spline; 1023. collapse structure; 103. second connecting shaft;

[0037] 2. First universal joint; 3. Second universal joint;

[0038] 4. protective plate; 401. mounting portion; 402. guide groove; 403. first reinforcing rib; 4031. first guide portion; 404. second reinforcing rib; 4041. second guide portion;

[0039] 5. Bellows; 6. Clamp. DETAILED DESCRIPTION

[0040] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0041] In the description of the present invention, it should be noted that the terms "upper" and "lower" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0042] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection", and "connector" 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 or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0043] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0044] Embodiment 1

[0045] The present embodiment relates to a transmission shaft assembly, which is applied to a vehicle body and can prevent the transmission shaft 1 from being pushed into the vehicle, thereby effectively protecting the lives of passengers in the vehicle.

[0046] Based on the above design concept, an exemplary structure of the transmission shaft assembly of this embodiment is as follows: Figure 1As shown, it mainly includes a transmission shaft 1 and a protective plate 4, wherein a mounting portion 401 is provided on the protective plate 4, and the protective plate 4 is mounted on the vehicle body through the mounting portion 401, and the mounted protective plate 4 is located above the transmission shaft 1.

[0047] A guide portion 1021 is provided at the front of the transmission shaft 1, and a guide groove 402 is provided on the protective plate 4. The guide groove 402 extends from a portion close to the transmission shaft 1 to the side and rearward of the vehicle. The front of the transmission shaft 1 pops up, and the guide portion 1021 can be embedded in the guide groove 402 to guide the front of the transmission shaft 1 to slide toward the side of the vehicle with the rear as the center.

[0048] It should be noted that in this embodiment, the guide groove 402 extends backward from a position close to the transmission shaft 1 to a position away from the transmission shaft 1 along the left-right direction of the vehicle (generally consistent with the width direction of the vehicle), and the rear refers to the rear direction of the vehicle, which is conducive to guiding the front part of the transmission shaft 1 to slide to the side of the vehicle. The side of the vehicle mentioned here can refer to the left side of the vehicle or the right side of the vehicle.

[0049] It should also be noted that the protective plate 4 and the transmission shaft 1 are two separate components. When the two are not installed on the vehicle body, there is no positional relationship between the protective plate 4 and the transmission shaft 1. After being installed on the vehicle body, the installation method of the transmission shaft 1 still refers to the structure in the prior art. When the protective plate 4 is installed, it is located above the transmission shaft 1. The distance between the two is preferably about 30 mm. The protective plate 4 is arranged in the horizontal direction, or in other words, the protective plate 4 is parallel to the horizontal direction. The notch of the guide groove 402 faces downward. When looking from the bottom up at the bottom of the vehicle, its structure can be referred to. Figure 1 The structure shown.

[0050] As a preferred embodiment, Figure 2 and Figure 3 As shown, the transmission shaft 1 of this embodiment includes a shaft tube 101, and a first connecting shaft 102 and a second connecting shaft 103 respectively connected to both ends of the shaft tube 101, and the first connecting shaft 102 and the second connecting shaft 103 are respectively welded to the shaft tube 101. Among them, the end of the first connecting shaft 102 away from the shaft tube 101 is provided with an external spline 1022, and the external spline 1022 is used for spline connection with the first universal joint 2, and the end of the second connecting shaft 103 away from the shaft tube 101 is used for connection with the second universal joint 3.

[0051] In the above structure, the transmission shaft 1 includes a shaft tube 101, a first connecting shaft 102 and a second connecting shaft 103. The outer diameters of the first connecting shaft 102 and the second connecting shaft 103 are smaller than the outer diameter of the shaft tube 101. The shaft tube 101 is arranged in the middle to reduce the total weight of the transmission shaft 1. Moreover, when the vehicle is subjected to a large collision force, the first connecting shaft 102 can also be pushed into the shaft hole of the shaft tube 101 to prevent the transmission shaft 1 from being pushed into the vehicle. The aforementioned guide portion 1021 is provided on the first connecting shaft 102. The guide portion 1021 is arranged adjacent to the shaft tube 101, which is convenient for processing. Moreover, the guide portion 1021 is arranged adjacent to the shaft tube 101, which is convenient for overall arrangement.

[0052] In a preferred embodiment, a bellows 5 is provided on the transmission shaft 1. Specifically, the bellows 5 is sleeved on the portion where the first connecting shaft 102 and the first universal joint 2 are splined. One end of the bellows 5 is clamped on the universal joint fork of the first universal joint 2 through a clamp 6, and the other end of the bellows 5 is clamped on the first connecting shaft 102 through a clamp 6.

[0053] As a preferred embodiment, the guide portion 1021 is integrally formed on the first connecting shaft 102, and can be specifically integrally formed by a forging process, which is convenient for processing. Preferably, the guide portion 1021 is arranged around the entire circumference of the first connecting shaft 102. When the first connecting shaft 102 is assembled with the shaft tube 101 and the first universal joint 2, and when the transmission shaft 1 is installed on the vehicle body, there is no need to limit the installation direction. No matter how it is installed, the guide portion 1021 can be embedded in the guide groove 402 when it pops up.

[0054] As in this embodiment, preferably, the cross-section of the guide portion 1021 is semicircular, which is conducive to falling into the guide groove 402 and reducing the resistance of the guide portion 1021 during the sliding process in the guide groove 402, and can achieve a better guiding effect, which is conducive to the smooth sliding of the guide portion 1021 in the guide groove 402.

[0055] As a preferred embodiment, Figures 4 to 6 As shown, the middle part of the protective plate 4 is provided with a first reinforcing rib 403, which is arranged just above the transmission shaft 1, and the length direction of the first reinforcing rib 403 is consistent with the axial direction of the transmission shaft 1. In this arrangement, if the front part of the transmission shaft 1 bounces up just above, the first reinforcing rib 403 can better protect the protective plate 4, and can also prevent the front part of the transmission shaft 1 from pushing into the space inside the vehicle. Even if the transmission shaft 1 collapses to a certain extent in its own direction, the first reinforcing rib 403 can still better protect the protective plate 4, thereby preventing the front part of the transmission shaft 1 from pushing into the space inside the vehicle.

[0056] As a preferred embodiment, still refer to Figure 4As shown, guide grooves 402 are provided on both sides of the first reinforcing rib 403, and the guide grooves 402 on both sides are symmetrically arranged about the first reinforcing rib 403. If the vehicle is hit by a large impact force, causing the front part of the transmission shaft 1 not to bounce up directly upward, the guide portion 1021 can be embedded in the guide groove 402 on the side corresponding to the pop-up direction, and slide along the guide groove 402 on this side along the left and right direction of the vehicle toward the outside of the vehicle, thereby better protecting the occupants in the vehicle. That is to say, when the head of the transmission shaft 1 bounces upward, no matter it is biased to the left or right side of the vehicle, it can be embedded in the corresponding guide groove 402, so that it can slide left and right in cooperation with the guide portion 1021 and the guide groove 402.

[0057] Due to structural limitations, the axial length of the aforementioned external spline 1022 is subject to certain restrictions and cannot be made too long, otherwise the NVH performance of the entire vehicle will be affected. Therefore, only a spline matching structure is provided between the first universal joint 2 and the drive shaft 1. As a result, when the vehicle is hit, the distance that the drive shaft 1 can shrink along its own axial direction is limited. If the impact is particularly large, when the spline connection part has been shortened to the limit position and is still subjected to impact force, the drive shaft 1 may be impacted in all directions.

[0058] Ideally, the transmission shaft 1 impacts both sides of the vehicle in the horizontal direction, but the transmission shaft 1 may also rush upward into the cockpit, seriously threatening the personal safety of the passengers. Therefore, as a preferred embodiment, the first connecting shaft 102 is further provided with a collapse structure 1023 near the shaft tube 101, and the collapse structure 1023 is used to collapse and deform the transmission shaft 1 along its own axial direction.

[0059] Specifically, the crush structure 1023 is arranged at a position close to the connection between the first connecting shaft 102 and the shaft tube 101. Specifically, the crush structure 1023 is realized by the diameter difference between the first connecting shaft 102 and the shaft tube 101. The existing structure can be referred to. When the front end of the vehicle is hit, part of the structure of the first connecting shaft 102 will enter the shaft tube 101, thereby achieving the effect of crushing energy absorption.

[0060] In the above structure, the crush structure 1023 can bear a certain impact force, or absorb part of the collision energy, which is beneficial to improving the driving experience. It not only has a certain buffering effect on the drive shaft 1, but also can reduce the impact force when the drive shaft 1 bounces up. The set crush structure 1023 can prevent the drive shaft 1 from bending when the vehicle collides, and can also better prevent the drive shaft 1 from bouncing up, which can enhance the protection of the vehicle body, help to extend the service life of the vehicle body, and can effectively protect the safety of the passengers in the vehicle.

[0061] In a preferred embodiment, there are multiple guide grooves 402 on each side, and the multiple guide grooves 402 on each side are arranged in sequence along the front-rear direction of the vehicle, so that the first connecting shaft 102 can be embedded in different guide grooves 402 when the axial collapse distance of the transmission shaft 1 is different. Even if it is subjected to different impact forces and the front part of the transmission shaft 1 bounces upward, the guide part 1021 can still be embedded in one of the guide grooves 402, thereby ensuring the guiding effect of the guide part 1021 and the guide groove 402.

[0062] As in the present embodiment, the number of guide grooves 402 on each side is six with different radii. It should be understood that the number of guide grooves 402 on each side may also be set to other numbers, such as one, two, three, four, five, etc. As a preferred embodiment, a first guide portion 4031 is provided on the first reinforcing rib 403. The first guide portion 4031 corresponds to the guide groove 402 one by one, and the first guide portion 4031 is used to guide the guide portion 1021 to be embedded in the guide groove 402 corresponding to the first guide portion 4031. As in the present embodiment, the first guide portion 4031 may be specifically chamfered or rounded corners formed on both sides of the first reinforcing rib 403, and as Figure 4 As shown, both upper and lower sides of the first reinforcing rib 403 are provided with chamfers or rounded corners to guide the guide portion 1021 to be smoothly embedded in the guide groove 402 on the corresponding side.

[0063] As shown in the above structure, the first guide portion 4031 can not only guide the guide portion 1021 to be embedded in the guide groove 402 corresponding to the first guide portion 4031, but the first reinforcement rib 403 can also better decompose the impact force, so that the component force pointing directly upward when the front part of the transmission shaft 1 bounces upward is reduced, thereby reducing the possibility of the front part of the transmission shaft 1 being pushed into the vehicle.

[0064] It should also be noted that, due to the provision of the first guide portion 4031 , the cross section of the first reinforcing rib 403 is triangular or nearly triangular, which has a better effect of guiding the guide portion 1021 to embed into the guide groove 402 .

[0065] As a preferred embodiment, a plurality of arc-shaped second reinforcing ribs 404 are provided on the protective plate 4, the centers of the plurality of second reinforcing ribs 404 are concentrically arranged, the middle portion of each second reinforcing rib 404 is bent in a direction away from the rear of the transmission shaft 1, and a guide groove 402 is formed between any adjacent second reinforcing ribs 404.

[0066] Here, the second reinforcing rib 404 is provided to strengthen the structural strength of the protective plate 4, and the second reinforcing rib 404 is set to be an arc shape, so that the projection of the guide groove 402 in the horizontal direction of the vehicle is an arc shape, so that the transmission shaft 1 can slide along the guide groove 402 with its rear part as the center, which is beneficial to improve the reliability of the guidance of the guide part 1021 and the guide groove 402.

[0067] Preferably, along the radial direction of the second reinforcing rib 404 , the width of the opening of the guide groove 402 is 50 mm-70 mm, such as 50 mm, 52 mm, 55 mm, 57 mm, 70 mm, etc., so that the guide part 1021 can be embedded in the guide groove 402 .

[0068] In a preferred embodiment, each second reinforcing rib 404 is provided with a second guide portion 4041 on at least one side. Figure 4 As shown, in this embodiment, the leftmost second reinforcing rib 404 is provided with a second guide portion 4041 on the side of the guide groove 402 facing the right side, and the rightmost second reinforcing rib 404 is provided with a second guide portion 4041 on the side of the guide groove 402 facing the left side, and the remaining second reinforcing ribs 404 are provided with second guide portions 4041 on both sides.

[0069] In this embodiment, the second guide portion 4041 is specifically chamfered or rounded, so as to facilitate the smooth insertion of the guide portion 1021 into the guide groove 402 corresponding to the second reinforcing rib 404. At the same time, the second guide portion 4041 can also decompose the impact force well, so that the component force pointing upward when the front part of the transmission shaft 1 bounces upward is reduced, thereby reducing the possibility of the front part of the transmission shaft 1 being pushed into the vehicle.

[0070] In a preferred embodiment, due to the arrangement of the second guide portion 4041, the cross-section of each second reinforcing rib 404 is triangular or nearly triangular, which has a good effect of guiding the guide portion 1021 to be embedded in the guide groove 402. It should also be pointed out that due to the arrangement of the first reinforcing rib 403 and the second reinforcing rib 404, the shape of the side of the protective plate 4 facing the transmission shaft 1 is petal-shaped, and the second reinforcing ribs 404 on both sides are symmetrical about the first reinforcing rib 403, and the appearance is novel and beautiful.

[0071] As a preferred embodiment, refer to Figure 4 As shown, the aforementioned mounting portion 401 includes a plurality of mounting holes, and the protective plate 4 is mounted on the vehicle body by means of mounting members passing through the mounting holes, and when mounted, preferably, the protective plate 4 is arranged horizontally and located above the transmission shaft 1, and the side of the protective plate 4 provided with the guide groove 402 faces the ground. In the above structure, the mounting portion 401 is set as a mounting hole, which is simple to process, and the plurality of mounting holes are arranged at intervals in the circumferential direction of the protective plate 4, which is conducive to improving the stability of the protective plate 4 installed on the vehicle body.

[0072] like Figure 4As shown, in this embodiment, the number of mounting holes is 8, with four mounting holes on each side, and the four mounting holes are arranged at intervals in the vertical direction of the protective plate 4. After being installed on the vehicle body, the four mounting holes are arranged at intervals in the left and right directions of the vehicle, which can better improve the stability of the installation of the protective plate 4 on the vehicle body. It should be understood that it is also feasible to set the number of mounting holes to other numbers.

[0073] In the above structure, preferably, the mounting parts adopt bolt pairs, so that the protective plate 4 can be detachably mounted on the vehicle body, which is convenient for assembly and disassembly. It should be understood that it is also feasible to set the protective plate 4 on the vehicle body in other ways, such as welding, riveting, etc.

[0074] Finally, it should be noted that, in the present embodiment, the protective plate 4 is preferably made of a steel plate, and can be specifically formed in one piece by a stamping process, has a simple structure, is easy to manufacture, has a high structural strength, and has a strong ability to protect the chassis and body of the vehicle.

[0075] The drive shaft assembly of the present embodiment has a high structural strength, which can effectively reduce the possibility of the drive shaft 1 being pushed upward into the vehicle and has a high safety rate. By providing a guide portion 1021 on the drive shaft 1 and a guide groove 402 on the protective plate 4, when the vehicle is subjected to a large impact force causing the front part of the drive shaft 1 to bounce upward, the guide portion 1021 can be embedded in the guide groove 402, and guide the front part of the drive shaft 1 to slide toward the side of the vehicle with the rear part as the center, thereby preventing the front part of the drive shaft 1 from being pushed into the vehicle and effectively protecting the safety of the occupants in the vehicle.

[0076] Embodiment 2

[0077] This embodiment relates to a vehicle, on which is provided a transmission shaft assembly as in the first embodiment.

[0078] The vehicle of this embodiment, by applying the transmission shaft assembly of the first embodiment, has the same beneficial effects as the transmission shaft assembly of the first embodiment relative to the prior art, and will not be described in detail here.

[0079] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A transmission shaft assembly, characterized in that: It comprises a transmission shaft (1) and a protective plate (4); The protective plate (4) is provided with a mounting portion (401), and the protective plate (4) is mounted on the vehicle body via the mounting portion (401), and the mounted protective plate (4) is located above the transmission shaft (1); The protective plate (4) is provided with a guide groove (402), and the guide groove (402) extends from a position close to the transmission shaft (1) to the side of the vehicle and backward; The front part of the transmission shaft (1) is provided with a guide part (1021), the front part of the transmission shaft (1) pops up, and the guide part (1021) can be embedded in the guide groove (402) to guide the front part of the transmission shaft (1) to slide toward the side of the vehicle with the rear part as the center.

2. The transmission shaft assembly according to claim 1, characterized in that: The transmission shaft (1) comprises a shaft tube (101), and a first connecting shaft (102) and a second connecting shaft (103) respectively connected to two ends of the shaft tube (101); An end of the first connecting shaft (102) away from the shaft tube (101) is provided with an external spline (1022), and the external spline (1022) is used for spline connection with the first universal joint (2); and an end of the second connecting shaft (103) away from the shaft tube (101) is used for connection with the second universal joint (3); The guide portion (1021) is provided on the first connecting shaft (102), and the guide portion (1021) is arranged adjacent to the shaft tube (101).

3. The transmission shaft assembly according to claim 2, characterized in that: The guide portion (1021) is integrally formed on the first connecting shaft (102), and the cross section of the guide portion (1021) is semicircular.

4. The transmission shaft assembly according to claim 2, characterized in that: A first reinforcing rib (403) is provided in the middle of the protective plate (4), the length direction of the first reinforcing rib (403) is consistent with the axial direction of the transmission shaft (1), and the first reinforcing rib (403) is arranged directly above the transmission shaft (1).

5. The transmission shaft assembly according to claim 4, characterized in that: The guide grooves (402) are provided on both sides of the first reinforcing rib (403), and the guide grooves (402) on both sides are arranged symmetrically with respect to the first reinforcing rib (403).

6. The transmission shaft assembly according to claim 5, characterized in that: A collapse structure (1023) is provided at a portion of the first connecting shaft (102) close to the shaft tube (101), and the collapse structure (1023) is used to cause the transmission shaft (1) to collapse and deform along its own axial direction; There are a plurality of guide grooves (402) on each side, and the plurality of guide grooves (402) on each side are arranged in sequence at intervals along the front-rear direction of the vehicle. The front portion of the transmission shaft (1) pops up, and the guide portion (1021) can be embedded in one of the guide grooves (402).

7. The transmission shaft assembly according to claim 6, characterized in that: The first reinforcing rib (403) is provided with a first guide portion (4031), and the first guide portion (4031) corresponds one-to-one to the guide groove (402); The first guide portion (4031) is used to guide the guide portion (1021) to be embedded in the guide groove (402) corresponding to the first guide portion (4031).

8. The transmission shaft assembly according to claim 6, characterized in that: The protective plate (4) is provided with a plurality of arc-shaped second reinforcing ribs (404), and the middle portion of each of the second reinforcing ribs (404) is bent in a direction away from the rear portion of the transmission shaft (1); The centers of the circles of the plurality of second reinforcing ribs (404) are concentrically arranged, and the guide grooves (402) are formed between any adjacent second reinforcing ribs (404); Each of the second reinforcing ribs (404) is provided with a second guide portion (4041) on at least one side, and the second guide portion (4041) is used to guide the guide portion (1021) to be embedded in the guide groove (402) on the corresponding side.

9. The transmission shaft assembly according to any one of claims 1 to 8, characterized in that: The mounting portion (401) comprises a plurality of mounting holes, and the plurality of mounting holes are arranged at intervals in the circumferential direction of the protective plate (4); The protective plate (4) is mounted on the vehicle body via mounting pieces passing through the mounting holes.

10. A vehicle, characterized in that: The vehicle is provided with a transmission shaft assembly according to any one of claims 1 to 9.

Images