Split type constant-speed duplex universal joint steering intermediate shaft

Abstract

The utility model discloses a split type constant speed duplex universal joint steering intermediate shaft which comprises an intermediate shaft body, an assembling groove is formed in one end of the intermediate shaft body, a universal joint mechanism is installed in the assembling groove, first magnetic blocks are fixedly installed at one ends of the two sides of the intermediate shaft body respectively, and pulleys are fixedly installed on the sides, away from each other, of the two first magnetic blocks respectively. According to the split type constant-speed duplex universal joint steering intermediate shaft, a common ball joint fork is designed to be integrally formed, gear shaping is needed for spline machining of the integrated ball joint fork, machining precision is poor, and machining efficiency is low, the ball joint fork is designed to be of a split structure, the machining cost of splines of the split ball joint fork is reduced, and machining efficiency is improved. The processing efficiency is improved; the ball bowl joint fork and the steering shaft are connected through an interference plane, compared with conventional spline connection, the machining cost is lower, axial pull-off is prevented through rivets, the requirement for large-angle arrangement of the whole vehicle can be met through a duplex structure, adaptability is high, and rotation uniformity is good.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a split type constant velocity double universal joint steering intermediate shaft. Background Art

[0002] The steering intermediate shaft serves as the connecting structure of the automobile steering system. The upper end is connected to the steering column output shaft, and the lower end is connected to the steering gear input shaft. It transmits the torque of the steering column to the steering gear, thereby realizing the automobile steering function. The universal joint is a mechanical structure that uses a spherical connection to realize power transmission of different axes. It is a mechanical component that realizes variable-angle power transmission and is a relatively important component of the automobile.

[0003] However, traditional universal joints have the following disadvantages:

[0004] In the prior art, when the space of the entire vehicle is limited, the intermediate shaft of the vehicle steering system and the steering gear input shaft need to be arranged at a large angle. Since there is an angle limit for the rotation of the universal joint, a single universal joint will experience steering jamming, uneven torque, low torque transmission efficiency, poor steering durability and other problems when arranged at a large angle. Utility Model Content

[0005] The purpose of the utility model is to provide a split constant velocity double universal joint steering intermediate shaft to solve the problems in the prior art proposed in the above background technology that when the space of the whole vehicle is limited, the intermediate shaft of the vehicle steering system and the steering gear input shaft need to be arranged at a large angle. Since there is an angle limit for the rotation of the universal joint, when the single universal joint is arranged at a large angle, steering stagnation, uneven torque, low torque transmission efficiency and poor steering durability may occur.

[0006] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a split constant-velocity double-joint universal-joint steering intermediate shaft, comprising an intermediate shaft, an assembly groove being provided at one end of the intermediate shaft, a universal-joint mechanism being installed inside the assembly groove, a first magnetic block being fixedly installed at one end on both sides of the intermediate shaft, a pulley being fixedly installed on the opposite sides of the two first magnetic blocks, and a translation member being installed at the other end of the intermediate shaft, the universal-joint mechanism comprising a ball bowl yoke, a first cross shaft and a second cross shaft, mounting plates being fixedly installed at both ends of the ball bowl yoke, one end of the two mounting plates being respectively connected to the two ends of the first cross shaft, one end of the other two mounting plates being respectively connected to the two ends of the second cross shaft, a double yoke being installed at one end of the first cross shaft away from the mounting plate, a ball head being installed at one end of the second cross shaft away from the mounting plate, and the second cross shaft being connected to the side opposite to the split yoke through the ball head.

[0007] Preferably, the first cross shaft and the second cross shaft each include a cross shaft frame and four bearings, the four corners of the cross shaft frame are respectively connected to one end of the four bearings, the cross shaft frame includes a first positioning shell and four assembly shafts, the top end of the first positioning shell, the bottom end of the first positioning shell and the two ends of the first positioning shell are respectively connected to one end of the four assembly shafts, both sides of the first positioning shell are provided with assembly holes, the four assembly shafts are respectively connected to the four bearings, a rivet hole is designed on the top of the ball bowl yoke, the top plane of the ball bowl yoke and the assembly groove are pressed in with interference fit, and then the rivet is used as a redundant device The design prevents the intermediate shaft and the ball bowl yoke from being pulled apart; the inner spline of the split yoke is broached by a spline broaching tool, the outer circle of the ball head is machined with splines, the ball head and the split yoke are pressed in through spline interference and spot welded after the ball head and the split yoke are pressed into place to prevent axial pulling apart, and after assembly is completed, it becomes a split ball head yoke; the ball bowl yoke and the assembled split ball head yoke realize torsion transmission with the double yoke, the cross shaft and the bearings on the cross shaft, and the cooperation of the ball head and the ball bowl can achieve that when the ball head yoke rotates an angle, the ball bowl yoke will also rotate the same angle, thereby ensuring that the angle θ1 and the angle θ2 are equal.

[0008] Preferably, the two bearings on the first cross shaft are respectively connected to two of the mounting plates, and the two bearings on the second cross shaft are respectively connected to the other two mounting plates. The first cross shaft is mounted on the mounting plates via bearings, and the second cross shaft is mounted on the mounting plates via bearings.

[0009] Preferably, a length rod is installed at one end of the double yoke away from the first cross axis, and the length rod is arranged corresponding to the assembly slot. A rivet is threadedly connected to the surface of the length rod, and the length rod is connected to the assembly slot through the rivet. After the universal joint mechanism is inserted into the assembly slot through the length rod, the user twists the rivet, and the thread on the surface of the rivet matches the thread on the inner wall of the length rod, thereby installing the universal joint mechanism on the intermediate shaft.

[0010] Preferably, the translation member includes a second positioning shell and two linear rails, the two sides of the inner wall of the second positioning shell are fixedly connected to one side of the two linear rails, and the two pulleys are slidably connected to the two linear rails, respectively. During the sliding process of the first magnetic block, the pulley is driven to slide along the linear rails to adjust the position of the second positioning shell relative to the intermediate shaft.

[0011] Preferably, translation grooves are provided on both sides of the second positioning shell, and second magnetic blocks are slidably connected inside the two translation grooves. The two first magnetic blocks are respectively arranged corresponding to the two second magnetic blocks. The user slides the second magnetic block along the translation groove. The second magnetic block itself has magnetism. The second magnetic block magnetically absorbs the first magnetic block and drives the first magnetic block to move synchronously under the action of magnetic force.

[0012] Preferably, a return spring is fixedly installed at one end of each of the two second magnetic blocks, and one end of the two return springs is fixedly connected to one side opposite to the two translation slots respectively. When a user slides the translation slot along the second magnetic block, the second magnetic block pulls the return spring from one side. The return spring is elastic, and the return spring undergoes elastic deformation to buffer the pulling force.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The general ball yoke is designed as an integrated one. The spline processing of the integrated ball yoke requires the use of tooth shaping, which has poor processing accuracy and low efficiency. The ball yoke of the present invention is designed as a split structure, which reduces the processing cost of the split ball yoke spline and improves the processing efficiency;

[0015] 2. The ball bowl yoke and steering shaft are connected by interference plane, which has lower processing cost than conventional spline connection, and rivets are used to prevent axial pull-off. The double-joint structure can meet the large-angle layout of the vehicle, has strong adaptability and good rotation uniformity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a side view of the utility model;

[0017] Figure 2 It is a partial schematic diagram of the utility model;

[0018] Figure 3 It is an exploded view of the universal joint mechanism of the utility model;

[0019] Figure 4 This is a connection diagram of the intermediate shaft and the translation member of the utility model;

[0020] Figure 5 It is a side view of the translation member of the utility model;

[0021] Figure 6 It is a cross-sectional view of the universal joint mechanism of the utility model;

[0022] Figure 7 It is a schematic diagram of the structure of the bearing of the utility model.

[0023] In the figure: 1. intermediate shaft; 2. universal joint mechanism; 21. double yoke; 22. first cross shaft; 221. cross shaft frame; 2211. first positioning shell; 2212. assembly shaft; 2213. assembly hole; 222. bearing; 23. second cross shaft; 24. bowl yoke; 25. split yoke; 26. length rod; 27. mounting plate; 28. ball head; 3. translation member; 31. second positioning shell; 32. second magnetic block; 33. linear track; 34. return spring; 35. translation slot; 4. assembly slot; 5. rivet; 6. pulley; 7. first magnetic block. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0025] See also Figure 1-7 The utility model provides a split constant velocity double universal joint steering intermediate shaft, including an intermediate shaft 1, an assembly groove 4 is opened at one end of the intermediate shaft 1, a universal joint mechanism 2 is installed inside the assembly groove 4, one end of both sides of the intermediate shaft 1 is fixedly installed with a first magnetic block 7, the opposite sides of the two first magnetic blocks 7 are fixedly installed with a pulley 6, the other end of the intermediate shaft 1 is installed with a translation member 3, the universal joint mechanism 2 includes a ball bowl yoke 24, a first cross shaft 22 and a second cross shaft 23, both ends of both sides of the ball bowl yoke 24 are fixedly installed with mounting plates 27, one end of the two mounting plates 27 is respectively connected to the two ends of the first cross shaft 22, one end of the other two mounting plates 27 is respectively connected to the two ends of the second cross shaft 23, a double yoke 21 is installed at one end of the first cross shaft 22 away from the mounting plate 27, a ball head 28 is installed at one end of the second cross shaft 23 away from the mounting plate 27, and the second cross shaft 23 is connected to the side directly opposite to the split yoke 25 through the ball head 28.

[0026] The first cross axis 22 and the second cross axis 23 both include a cross axis frame 221 and four bearings 222. The four corners of the cross axis frame 221 are respectively connected to one end of the four bearings 222. The cross axis frame 221 includes a first positioning shell 2211 and four assembly shafts 2212. The top of the first positioning shell 2211, the bottom of the first positioning shell 2211 and the two ends of the first positioning shell 2211 are respectively connected to one end of the four assembly shafts 2212. Both sides of the first positioning shell 2211 are provided with assembly holes 2213. The four assembly shafts 2212 are respectively connected to the four bearings 222. A rivet hole is designed on the top of the bowl yoke 24. After the top plane of the bowl yoke 24 and the assembly groove 4 are pressed into the interference fit , and then the rivet 5 is used as a redundant design to prevent the intermediate shaft 1 from being pulled off from the ball bowl yoke 24; the inner spline of the split yoke 25 is broached by a spline broaching tool, and the outer circle of the ball head 28 is processed with a spline, the ball head 28 and the split yoke 25 are pressed into place through spline interference and spot welded after the ball head 28 and the split yoke 25 are pressed into place to prevent axial pulling off, and after assembly is completed, it becomes a split ball head yoke; the ball bowl yoke 24 and the assembled split ball head yoke realize torsion transmission with the double yoke 21, the cross shaft and the bearing 222 on the cross shaft, and the cooperation of the ball head 28 and the ball bowl can realize that when the ball head yoke rotates an angle, the ball bowl yoke 24 will also rotate the same angle, thereby ensuring that the angle θ1 and the angle θ2 are equal.

[0027] The two bearings 222 on the first cross shaft 22 are connected to two of the mounting plates 27 respectively, and the two bearings 222 on the second cross shaft 23 are connected to the other two mounting plates 27 respectively. The first cross shaft 22 is installed on the mounting plates 27 through the bearings 222, and the second cross shaft 23 is installed on the mounting plates 27 through the bearings 222.

[0028] A length rod 26 is installed at one end of the double yoke 21 away from the first cross shaft 22. The length rod 26 is arranged corresponding to the assembly groove 4. The surface of the length rod 26 is threadedly connected with a rivet 5. The length rod 26 is connected to the assembly groove 4 through the rivet 5. After the universal joint mechanism 2 is inserted into the assembly groove 4 through the length rod 26, the user twists the rivet 5, and the thread on the surface of the rivet 5 matches the thread on the inner wall of the length rod 26, so that the universal joint mechanism 2 is installed on the intermediate shaft 1.

[0029] The translation member 3 includes a second positioning shell 31 and two linear rails 33. The two sides of the inner wall of the second positioning shell 31 are fixedly connected to one side of the two linear rails 33 respectively. The two pulleys 6 are slidingly connected to the two linear rails 33 respectively. During the sliding process of the first magnetic block 7, the pulley 6 is driven to slide along the linear rails 33 to adjust the position of the second positioning shell 31 relative to the intermediate shaft 1.

[0030] Translation grooves 35 are provided on both sides of the second positioning shell 31, and the interiors of the two translation grooves 35 are slidably connected with second magnetic blocks 32. The two first magnetic blocks 7 are respectively arranged corresponding to the two second magnetic blocks 32. The user slides the second magnetic block 32 along the translation grooves 35. The second magnetic block 32 itself has magnetism. The second magnetic block 32 magnetically absorbs the first magnetic block 7 and drives the first magnetic block 7 to move synchronously under the action of the magnetic force.

[0031] A return spring 34 is fixedly installed at one end of the two second magnetic blocks 32, and one end of the two return springs 34 is fixedly connected to the side opposite to the two translation slots 35. When a user slides the translation slot 35 along the second magnetic block 32, the second magnetic block 32 pulls the return spring 34 from one side. The return spring 34 is elastic, and the return spring 34 undergoes elastic deformation to buffer the pulling force.

[0032] When the embodiment of the present application is in use: the user slides the translation groove 35 along the second magnetic block 32, and the second magnetic block 32 pulls the reset spring 34 from one side. The reset spring 34 is elastic, and the reset spring 34 undergoes elastic deformation to buffer the pulling force. The second magnetic block 32 itself is magnetic, and the second magnetic block 32 magnetically absorbs the first magnetic block 7, and drives the first magnetic block 7 to move synchronously under the action of the magnetic force. During the sliding process of the first magnetic block 7, the pulley 6 is driven to slide along the linear track 33, and the position of the second positioning shell 31 relative to the intermediate shaft 1 is adjusted. A rivet hole is designed on the top of the bowl yoke 24. After the top plane of the bowl yoke 24 and the assembly groove 4 are pressed in with interference, the rivet 5 is then used to fix the second positioning shell 31 relative to the intermediate shaft 1. As a redundant design, it prevents the intermediate shaft 1 from being pulled apart from the ball bowl yoke 24; the inner spline of the split yoke 25 is broached by a spline broaching tool, and the outer circle of the ball head 28 is processed with splines. The ball head 28 and the split yoke 25 are pressed into place through spline interference and spot welded after the ball head 28 and the split yoke 25 are pressed into place to prevent axial pulling apart. After assembly is completed, it becomes a split ball head yoke; the ball bowl yoke 24 and the assembled split ball head yoke realize torsion transmission with the double yoke 21, the cross shaft and the bearing 222 on the cross shaft, and the cooperation between the ball head 28 and the ball bowl can achieve that when the ball head yoke rotates an angle, the ball bowl yoke 24 will also rotate the same angle, thereby ensuring that the angle θ1 and the angle θ2 are equal.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A split type constant velocity double universal joint steering intermediate shaft, comprising an intermediate shaft (1), characterized in that: An assembly groove (4) is provided at one end of the intermediate shaft (1), a universal joint mechanism (2) is installed inside the assembly groove (4), first magnetic blocks (7) are fixedly installed at one end of both sides of the intermediate shaft (1), pulleys (6) are fixedly installed on the opposite sides of the two first magnetic blocks (7), a translation member (3) is installed at the other end of the intermediate shaft (1), and the universal joint mechanism (2) comprises a ball bowl yoke (24), a first cross shaft (22) and a second cross shaft (23), and both ends of both sides of the ball bowl yoke (24) are fixedly installed. A mounting plate (27) is provided, wherein one end of two of the mounting plates (27) are respectively connected to the two ends of the first cross shaft (22), and one end of the other two mounting plates (27) are respectively connected to the two ends of the second cross shaft (23); a double yoke (21) is installed at one end of the first cross shaft (22) away from the mounting plate (27), and a ball head (28) is installed at one end of the second cross shaft (23) away from the mounting plate (27); the second cross shaft (23) is connected to a side directly opposite to the split yoke (25) via the ball head (28).

2. The split type constant velocity double universal joint steering intermediate shaft according to claim 1, characterized in that: The first cross shaft (22) and the second cross shaft (23) both comprise a cross shaft frame (221) and four bearings (222); the four corners of the cross shaft frame (221) are respectively connected to one end of the four bearings (222); the cross shaft frame (221) comprises a first positioning shell (2211) and four assembly shafts (2212); the top end of the first positioning shell (2211), the bottom end of the first positioning shell (2211) and both ends of the first positioning shell (2211) are respectively connected to one end of the four assembly shafts (2212); both sides of the first positioning shell (2211) are provided with assembly holes (2213); the four assembly shafts (2212) are respectively connected to the four bearings (222).

3. A split type constant velocity double universal joint steering intermediate shaft according to claim 2, characterized in that: The two bearings (222) located on the first cross shaft (22) are respectively connected to two of the mounting plates (27), and the two bearings (222) located on the second cross shaft (23) are respectively connected to the other two mounting plates (27).

4. The split type constant velocity double universal joint steering intermediate shaft according to claim 1, characterized in that: A length rod (26) is installed at one end of the double yoke (21) away from the first cross axis (22); the length rod (26) is arranged corresponding to the assembly groove (4); a rivet (5) is threadedly connected to the surface of the length rod (26); and the length rod (26) is connected to the assembly groove (4) via the rivet (5).

5. The split type constant velocity double universal joint steering intermediate shaft according to claim 1, characterized in that: The translation member (3) comprises a second positioning shell (31) and two linear rails (33), the two sides of the inner wall of the second positioning shell (31) are respectively fixedly connected to one side of the two linear rails (33), and the two pulleys (6) are respectively slidably connected to the two linear rails (33).

6. A split type constant velocity double universal joint steering intermediate shaft according to claim 5, characterized in that: Translation grooves (35) are provided on both sides of the second positioning shell (31), and second magnetic blocks (32) are slidably connected inside the two translation grooves (35). The two first magnetic blocks (7) are respectively arranged corresponding to the two second magnetic blocks (32).

7. The split type constant velocity double universal joint steering intermediate shaft according to claim 6, characterized in that: A return spring (34) is fixedly mounted on one end of each of the two second magnetic blocks (32), and one end of each of the two return springs (34) is fixedly connected to one side directly opposite to the two translation slots (35).

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