Intermediate shaft assembly with low cost, small size and buffer type structure

Abstract

The invention provides a low-cost small-size buffer type structure intermediate shaft assembly, which relates to the technical field of automobile transmission systems, and comprises a shaft fork assembly, a pipe fork assembly, a cross shaft assembly I, an upper outer fork, a cross shaft assembly II, a lower outer fork and a sliding connection assembly, one end of the shaft fork assembly is connected with the upper outer fork through the first cross shaft assembly, the other end of the shaft fork assembly is connected with the pipe fork assembly in a sliding mode through the sliding connection assembly, and the end, away from the sliding connection assembly, of the pipe fork assembly is connected with the lower outer fork through the second cross shaft assembly. According to the vulcanization assembly, the vulcanized rubber is embedded into the grooves through a high-temperature vulcanization process to form a mechanical interlocking structure, compared with an existing simple bonding mode, the bonding strength of the vulcanized rubber and the inner and outer frameworks is greatly improved, the problem that a vulcanization connecting structure is prone to falling off is thoroughly solved, the overall service life of the intermediate shaft assembly is prolonged, and the service life of the intermediate shaft assembly is prolonged. And the development requirements of the automobile industry on light weight and low cost are met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile transmission system, in particular to a low-cost small-size buffering structure intermediate shaft assembly. BACKGROUND

[0002] In the automobile transmission system, the intermediate shaft assembly is a key component connecting the power output end and the execution end. Its main function is to transmit torque and adapt to the assembly error, working condition displacement and vibration impact of the transmission system, to ensure the stability and reliability of power transmission. However, the existing technical solutions still have many defects in practical application, which are difficult to meet the high requirements of automobiles on safety, comfort and cost control.

[0003] Firstly, the impact absorption capacity of the existing intermediate shaft assembly is weak. When the automobile runs on a bumpy road or encounters sudden overload impact, the impact energy transmitted by the chassis to the column cannot be effectively absorbed, which causes the column to easily fail in function, affecting the normal work of the transmission system and possibly causing safety hazards. Secondly, the existing structure lacks an effective abnormal noise filtering mechanism. The vibration generated by the chassis during operation will be directly transmitted to the vehicle body through the intermediate shaft assembly, forming obvious abnormal noise and seriously reducing the driving comfort. Thirdly, the connection structure of the vulcanization component in the axle fork assembly is not reasonable. The combination of vulcanized rubber and inner and outer skeletons only relies on simple adhesion, without forming a reliable mechanical interlocking, resulting in an unstable vulcanization connection structure and easy to fall off after long-term use, shortening the service life of the intermediate shaft assembly. In addition, most intermediate shaft assemblies use external damping structures. This structure not only occupies a large installation space, which is not conducive to the optimization of vehicle layout, but also requires additional damping components, increasing the number of parts and manufacturing costs, and also increasing the difficulty and cost of subsequent maintenance. Therefore, there is an urgent need for an intermediate shaft assembly structure that can solve the above problems to meet the demand of the automobile industry for low-cost, small-size, high-reliability buffering structure. SUMMARY

[0004] 1. Technical problems to be solved by the present application: The present application provides a low-cost small-size buffering structure intermediate shaft assembly to solve the technical problems existing in the background art.

[0005] 2. Technical solutions: To achieve the above-mentioned purpose, the technical solutions provided by the present application are as follows: a low-cost small-size buffering structure intermediate shaft assembly, comprising an axle fork assembly, a tube fork assembly, a cross shaft assembly I, an upper outer fork, a cross shaft assembly II, a lower outer fork and a sliding connection assembly; one end of the axle fork assembly is connected with the upper outer fork through the cross shaft assembly I, the other end of the axle fork assembly is slidingly connected with the tube fork assembly through the sliding connection assembly, and the end of the tube fork assembly away from the sliding connection assembly is connected with the lower outer fork through the cross shaft assembly II.

[0006] Preferably, the pipe fork assembly comprises a pipe body and a shaft fork, the shaft fork is fixedly connected to one end of the pipe body, the shaft fork is movably connected to the upper outer fork through the second cross shaft assembly, and the other end of the pipe body is in an open structure and the inner side wall of the other end of the pipe body is slidably connected to the outer side wall of the other end of the upper outer fork away from the first cross shaft assembly through the sliding connection assembly.

[0007] Preferably, the shaft fork assembly comprises a sliding shaft, a vulcanization assembly, a shaft fork and a baffle, the shaft fork is movably connected to the upper outer fork through the first cross shaft assembly, the vulcanization assembly is sleeved on the outer wall of the sliding shaft, the shaft fork is sleeved on the outer wall of the vulcanization assembly, and the baffle is fixed to one end of the sliding shaft close to the shaft fork, and one end of the baffle abuts against the vulcanization assembly and one end of the shaft fork.

[0008] Preferably, the vulcanization assembly comprises an inner framework, an outer framework and vulcanized rubber, the inner framework is sleeved on the outer wall of the sliding shaft, the outer framework is coaxially sleeved on the outer side of the inner framework, and the vulcanized rubber is filled and fixed between the inner framework and the outer framework through a high-temperature vulcanization process.

[0009] Preferably, the sliding connection assembly comprises a ball holder, balls, a guide groove one and a guide groove two, the guide groove one is axially formed on the outer side wall of the sliding shaft away from one end of the first cross shaft assembly, the guide groove two is axially formed on the inner side wall of the pipe body away from one end of the shaft fork two, and the guide groove one and the guide groove two correspond to each other and form a ball containing cavity, the ball holder is sleeved on the outer side of the sliding shaft and located inside the pipe body, a plurality of balls are rotatably installed in the ball holes of the ball holder, one side of the balls is embedded in the guide groove one and the other side is embedded in the guide groove two, and the limiting ring is fixedly sleeved on the outer wall of the open end of the pipe body, and one side of the limiting ring close to the ball holder abuts against the end of the ball holder to limit the axial disengagement.

[0010] Preferably, a clamping groove is formed at the center of the baffle, the end of the sliding shaft passes through the clamping groove, the clasp is clamped in the clamping groove, and the clasp abuts against the baffle to limit the axial displacement of the baffle.

[0011] Preferably, the outer side wall of the inner framework and the inner side wall of the outer framework are both provided with staggered grooves and protrusions at equal distances, and the vulcanized rubber is embedded in the grooves to form a mechanical interlocking structure.

[0012] Preferably, the vulcanized rubber comprises a main buffer layer and an auxiliary vibration absorption layer arranged from inside to outside, the hardness of the main buffer layer is greater than that of the auxiliary vibration absorption layer, the main buffer layer is used to provide support and bear the main impact load, and the auxiliary vibration absorption layer is used to filter high-frequency vibration and abnormal sound.

[0013] 3. Beneficial effects: Compared with the prior art, the technical scheme provided by the present application has the following beneficial effects: The present application significantly improves the impact absorption capacity and reduces the safety hazards. By arranging the vulcanization assembly in the axle fork assembly, the main cushion layer of the vulcanized rubber bears the main impact load by virtue of the higher hardness, and efficiently absorbs the overload impact energy through elastic deformation, thereby fundamentally solving the problem of weak impact absorption capacity in the prior art, greatly reducing the probability of functional failure of the pipe column caused by impact, and improving the safety and reliability of the automobile transmission system.

[0014] The present application can effectively filter vibration and abnormal sound, optimize the driving experience, and the auxiliary vibration absorption layer with lower hardness in the vulcanization assembly can filter the high-frequency vibration generated by the chassis and block the abnormal sound propagation path. In combination with the rolling cooperation of the ball in the sliding connection assembly to reduce the sliding friction abnormal sound, the double effects completely solve the defect of obvious abnormal sound in the prior art, significantly improve the driving comfort, and meet the high requirements of users on the performance of automobile noise, vibration and sound roughness.

[0015] The inner and outer skeletons of the vulcanization assembly are designed with staggered grooves and protrusions, and the vulcanized rubber is embedded in the grooves to form a mechanical interlocking structure through a high-temperature vulcanization process. Compared with the simple bonding method in the prior art, the bonding strength of the vulcanized rubber and the inner and outer skeletons is greatly improved, the problem of easy falling off of the vulcanization connection structure is completely solved, the overall service life of the intermediate shaft assembly is prolonged, and the user maintenance cost is reduced.

[0016] The present application integrates the buffer and shock absorption functions in the vulcanization assembly of the axle fork assembly, eliminates the design of the external shock absorber in the prior art, greatly reduces the overall volume of the intermediate shaft assembly, saves the installation space of the whole vehicle, and facilitates the layout optimization of the whole vehicle. At the same time, the procurement and assembly process of the external shock absorbing parts are reduced, and in combination with the integrated axle fork assembly design, the manufacturing cost is effectively reduced, which meets the development needs of the automobile industry for lightweight and low cost.

[0017] The limiting ring of the sliding connection assembly can prevent the ball holder from being axially pulled out, the baffle and buckle of the axle fork assembly can limit the movement of the vulcanization assembly, and the double limiting design ensures the stable operation of each part under the conditions of impact, vibration and axial displacement. In addition, the active connection design of the cross shaft assembly one and the cross shaft assembly two can adapt to the multi-angle power transmission demand of the transmission system, and improve the adaptability of the intermediate shaft assembly to complex working conditions. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present application; Figure 2 is a schematic diagram of the overall structure of the present application from another angle; Figure 3 is an exploded schematic diagram of the overall structure of the present application; Figure 4 Figure 1 is a schematic diagram of a shaft fork assembly and a sliding connection assembly according to the present application; Figure 5 Figure 2 is a schematic diagram of an external structure of a shaft fork assembly according to the present application; Figure 6 Figure 3 is a schematic diagram of an exploded view of a shaft fork assembly according to the present application; Figure 7 Figure 4 is a schematic diagram of an internal structure of a shaft fork assembly according to the present application; Figure 8 Figure 5 is a schematic diagram of a baffle and a buckle connection according to the present application; Figure 9 Figure 6 is a schematic diagram of a tube fork assembly structure according to the present application.

[0019] Reference signs: 1, shaft fork assembly; 11, sliding shaft; 12, vulcanization assembly; 13, shaft fork one; 14, baffle; 15, inner framework; 16, outer framework; 17, vulcanized rubber; 18, buckle; 2, tube fork assembly; 21, tube body; 22, shaft fork two; 3, cross shaft assembly one; 4, upper outer fork; 5, cross shaft assembly two; 6, lower outer fork; 7, sliding connection assembly; 71, ball holder; 72, ball; 73, guide groove one; 74, guide groove two; 75, limiting ring. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings, in which several embodiments of the present application are given. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present application is more thorough and complete.

[0021] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0022] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0023] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing", "providing" and other terms should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] It should be noted that the structures not introduced in the present application do not involve the design points and improvement direction of the present application, and are the same as or can be realized by using the prior art, and will not be described here. Embodiment

[0025] Referring to the drawings Figures 1-9 A low-cost small-volume buffer structure intermediate shaft assembly, comprising a shaft fork assembly 1, a tube fork assembly 2, a cross shaft assembly 1 3, an upper outer fork 4, a cross shaft assembly 2 5, a lower outer fork 6 and a sliding connection assembly 7; one end of the shaft fork assembly 1 is connected with the upper outer fork 4 through the cross shaft assembly 1 3, the other end of the shaft fork assembly 1 is connected with the tube fork assembly 2 through the sliding connection assembly 7, and the end of the tube fork assembly 2 away from the sliding connection assembly 7 is connected with the lower outer fork 6 through the cross shaft assembly 2 5.

[0026] The tube fork assembly 2 comprises a tube body 21 and a shaft fork 2 2, the shaft fork 2 2 is fixedly connected to one end of the tube body 21, the shaft fork 2 2 is movably connected with the lower outer fork 6 through the cross shaft assembly 2 5, and the other end of the tube body 21 is an open structure and the inner side wall of the end of the tube body 21 is slidably connected with the outer side wall of the end of the upper outer fork 4 away from the cross shaft assembly 1 3 through the sliding connection assembly 7.

[0027] The shaft fork assembly 1 comprises a sliding shaft 11, a vulcanization assembly 12, a shaft fork 1 3 and a baffle 14, the shaft fork 1 3 is movably connected with the upper outer fork 4 through the cross shaft assembly 1 3, the vulcanization assembly 12 is sleeved on the outer wall of the sliding shaft 11, the shaft fork 1 3 is sleeved on the outer wall of the vulcanization assembly 12, and the baffle 14 is fixed to one end of the sliding shaft 11 close to the shaft fork 1 3, and one end of the baffle 14 abuts against one end of the vulcanization assembly 12 and the shaft fork 1 3.

[0028] The vulcanization assembly 12 comprises an inner skeleton 15, an outer skeleton 16 and vulcanized rubber 17, the inner skeleton 15 is sleeved on the outer wall of the sliding shaft 11, the outer skeleton 16 is coaxially sleeved on the outer side of the inner skeleton 15, and the vulcanized rubber 17 is filled and fixed between the inner skeleton 15 and the outer skeleton 16 through a high-temperature vulcanization process.

[0029] The center of the baffle plate 14 is provided with a clamping groove, the end of the sliding shaft 11 passes through the clamping groove, the buckle 18 is clamped in the clamping groove, and the buckle 18 abuts against the baffle plate 14 to limit the axial displacement of the baffle plate 14.

[0030] The outer side wall of the inner skeleton 15 and the inner side wall of the outer skeleton 16 are both provided with staggered grooves and protrusions at equal distances, and the vulcanized rubber 17 is embedded in the grooves to form a mechanical interlocking structure.

[0031] The vulcanized rubber 17 includes a main cushion layer and an auxiliary vibration absorption layer arranged in sequence from inside to outside, the hardness of the main cushion layer is greater than that of the auxiliary vibration absorption layer, the main cushion layer is used to provide support and bear the main impact load, and the auxiliary vibration absorption layer is used to filter high-frequency vibration and abnormal sound.

[0032] The sliding connection assembly 7 includes a ball holder 71, balls 72, a guide groove one 73, a guide groove two 74, and a limiting ring 75; the guide groove one 73 is axially arranged on the outer side wall of the sliding shaft 11 away from one end of the cross shaft assembly one 3, the guide groove two 74 is axially arranged on the inner side wall of the pipe body 21 away from one end of the shaft fork two 22, and the guide groove one 73 and the guide groove two 74 correspond to each other and form a ball containing cavity; the ball holder 71 is sleeved on the outer side of the sliding shaft 11 and located inside the pipe body 21, a plurality of balls 72 are rotatably installed in the ball holes of the ball holder 71, one side of the ball 72 is embedded in the guide groove one 73, the other side is embedded in the guide groove two 74, and the limiting ring 75 is fixedly sleeved on the outer wall of the open end of the pipe body 21, and one side of the limiting ring 75 close to the ball holder 71 abuts against the end of the ball holder 71 to limit the axial disengagement.

[0033] Working principle: When the automobile transmission system operates, the impact and vibration generated by the power or chassis first act on the lower outer fork 6, the lower outer fork 6 transmits the torque or load to the shaft fork two 22 of the pipe fork assembly 2 through the cross shaft assembly two 5; since the shaft fork two 22 is fixedly connected with the pipe body 21, the shaft fork two 22 drives the pipe body 21 to move synchronously, the pipe body 21 transmits the load to the upper outer fork 4 through the sliding connection assembly 7 on the inner side wall thereof; the upper outer fork 4 transmits the load to the shaft fork one 13 of the shaft fork assembly 1 through the cross shaft assembly one 3, and finally the sliding shaft 11 of the shaft fork assembly 1 transmits the power or load to the subsequent transmission components to complete the entire transmission process.

[0034] When encountering an overload impact, the impact load is transmitted to the vulcanization assembly 12 of the axle fork assembly 1 through the above-mentioned path: the axle fork 13 acts on the outer frame 16 of the vulcanization assembly 12, and the outer frame 16 transmits the load to the inner frame 15 through the vulcanized rubber 17; at this time, the main buffer layer with high hardness in the vulcanized rubber 17 plays a core role, absorbs a large amount of impact energy through elastic deformation, avoids direct transmission of the impact to the sliding shaft 11 and subsequent components, and thus reduces the probability of functional failure of the pipe column; at the same time, the mechanical interlocking structure formed by the grooves and protrusions on the side walls of the inner frame 15 and the outer frame 16 ensures that the outer frame 16, the vulcanized rubber 17 and the inner frame 15 are not relatively separated, and the stability of the impact absorption process is ensured.

[0035] For high-frequency vibration and abnormal sound generated by chassis operation, when transmitted to the vulcanization assembly 12, the auxiliary vibration absorption layer with low hardness in the vulcanized rubber 17 plays a role: the auxiliary vibration absorption layer converts high-frequency vibration energy into a small amount of heat energy through flexible deformation, and at the same time blocks the abnormal sound propagation path, avoiding transmission of vibration and abnormal sound to the vehicle body through the intermediate shaft assembly; in addition, the rolling cooperation of the ball 72 in the guide groove one 73 and the guide groove two 74 in the sliding connection assembly 7 reduces the sliding friction between the upper outer fork 4 and the pipe body 21, further reduces the generation of friction abnormal sound, and improves the driving comfort.

[0036] When the transmission system generates an axial displacement demand due to working condition changes, the sliding connection assembly 7 realizes the relative sliding between the upper outer fork 4 and the pipe body 21: the upper outer fork 4 drives the guide groove one 73 on the outer side wall to move synchronously, and the ball 72 rolls in the accommodating cavity formed by the guide groove one 73 and the guide groove two 74 to provide guidance for axial displacement; at the same time, the end of the ball holder 71 abuts against the limiting ring 75 to prevent the ball holder 71 from being pulled out of the pipe body 21 during displacement, ensuring the reliability of the sliding process; in addition, the baffle 14 in the axle fork assembly 1 is fixed at the end of the sliding shaft 11 through the buckle 18, limiting the axial displacement of the vulcanization assembly 12, and avoiding displacement failure of the buffer structure.

[0037] The above-described embodiments only express certain embodiments of the present application, which are described in detail and specifically, but should not be understood as limiting the scope of the present application; it should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application; therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A low-cost, small-volume buffer-type intermediate shaft assembly, characterized in that: It includes a fork assembly (1), a tube fork assembly (2), a cross shaft assembly one (3), an upper outer fork (4), a cross shaft assembly two (5), a lower outer fork (6), and a sliding connection assembly (7); one end of the fork assembly (1) is connected to the upper outer fork (4) through the cross shaft assembly one (3), the other end of the fork assembly (1) is slidably connected to the tube fork assembly (2) through the sliding connection assembly (7), and the end of the tube fork assembly (2) away from the sliding connection assembly (7) is connected to the lower outer fork (6) through the cross shaft assembly two (5).

2. The low-cost, small-volume buffer-type intermediate shaft assembly according to claim 1, characterized in that: The tube fork assembly (2) includes a tube body (21) and a second shaft fork (22). The second shaft fork (22) is fixedly connected to one end of the tube body (21). The second shaft fork (22) is movably connected to the lower outer fork (6) through the second cross shaft assembly (5). The other end of the tube body (21) is an open structure, and the inner wall of this end of the tube body (21) is slidably engaged with the outer wall of the upper outer fork (4) away from the first cross shaft assembly (3) through a sliding connection assembly (7).

3. The low-cost, small-volume buffer-type intermediate shaft assembly according to claim 1, characterized in that: The axle fork assembly (1) includes a sliding shaft (11), a vulcanizing assembly (12), axle fork one (13) and a baffle (14). The axle fork one (13) is movably connected to the upper outer fork (4) through a cross shaft assembly one (3). The vulcanizing assembly (12) is sleeved on the outer wall of the sliding shaft (11). The axle fork one (13) is sleeved on the outer wall of the vulcanizing assembly (12). The baffle (14) is fixed at one end of the sliding shaft (11) near the axle fork one (13), and one end of the baffle (14) abuts against one end of the vulcanizing assembly (12) and the axle fork one (13).

4. The low-cost, small-volume buffer-type intermediate shaft assembly according to claim 1, characterized in that: The vulcanization component (12) includes an inner skeleton (15), an outer skeleton (16) and vulcanized rubber (17). The inner skeleton (15) is sleeved on the outer wall of the sliding shaft (11), and the outer skeleton (16) is coaxially sleeved on the outside of the inner skeleton (15). The vulcanized rubber (17) is filled and fixed between the inner skeleton (15) and the outer skeleton (16) by a high-temperature vulcanization process.

5. The low-cost, small-volume buffer-type intermediate shaft assembly according to claim 2, characterized in that: The sliding connection assembly (7) includes a ball cage (71), balls (72), guide groove one (73), guide groove two (74), and a limiting ring (75); the guide groove one (73) is axially formed on the outer side wall of the sliding shaft (11) away from the cross shaft assembly one (3), and the guide groove two (74) is axially formed on the inner side wall of the tube body (21) away from the shaft fork two (22), and the guide groove one (73) and the guide groove two (74) correspond one-to-one and form a ball receiving cavity; The ball frame (71) is sleeved on the outside of the sliding shaft (11) and located inside the tube body (21). Several balls (72) are rotatably installed in the ball holes of the ball frame (71), and one side of the ball (72) is embedded in guide groove one (73) and the other side is embedded in guide groove two (74). The limiting ring (75) is fixedly sleeved on the outer wall of the open end of the tube body (21), and the side of the limiting ring (75) near the ball frame (71) abuts against the end of the ball frame (71) to restrict its axial disengagement.

6. The low-cost, small-volume buffer-type intermediate shaft assembly according to claim 2, characterized in that: A slot is provided at the center of the baffle (14), the end of the sliding shaft (11) passes through the slot, the buckle (18) is engaged in the slot, and the buckle (18) abuts against the baffle (14) to limit the axial displacement of the baffle (14).

7. The low-cost, small-volume buffer-type intermediate shaft assembly according to claim 4, characterized in that: The outer sidewall of the inner skeleton (15) and the inner sidewall of the outer skeleton (16) are provided with staggered grooves and protrusions at equal intervals, and the vulcanized rubber (17) is embedded in the groove to form a mechanical interlocking structure.

8. The low-cost, small-volume buffer-type intermediate shaft assembly according to claim 4, characterized in that: The vulcanized rubber (17) includes a main buffer layer and an auxiliary vibration-absorbing layer arranged sequentially from the inside to the outside. The hardness of the main buffer layer is greater than that of the auxiliary vibration-absorbing layer. The main buffer layer is used to provide support and bear the main impact load, and the auxiliary vibration-absorbing layer is used to filter high-frequency vibration and abnormal noise.

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