TWI779964B - Universal shaft anti-dropping protection device - Google Patents

Abstract

An anti-falling protection device for a universal shaft center, which is installed between the steering joint of the wheel axle of a motor vehicle and the rocker arm under the vehicle body. Joint, and around the outer limit of the lower cardan shaft center seat at the end of the lower rocker arm, so that the pivot connection between the cardan shaft center in the lower cardan shaft center seat and the steering knuckle is maintained, and the protective member provides The active distance for the rotation of the universal joint shaft bearing seat below the end of the lower rocker arm. In this way, on the basis of maintaining the normal rotation of the steering joint connected to the wheel shaft by the rocker arm under the car body, even if the lower cardan shaft center in the cardan shaft center seat under the end of the lower rocker arm is worn out from the wheel shaft When the steering joint is loose, use the protective member to surround the outer limit of the universal shaft center seat under the end of the lower rocker arm to prevent the steering of the lower universal shaft center and the wheel shaft in the lower universal shaft center seat. The joint is detached, reducing the risk of motor vehicles caused by the fall of the universal shaft of the lower rocker arm.

Description

Cardan shaft anti-falling protection device

The invention relates to an anti-drop protection device for a universal shaft center used in motor vehicles to prevent the universal shaft center at the end of the lower rocker arm of the vehicle body from detaching from the steering joint of the wheel shaft of the wheel.

Existing motor vehicles can drive on rough ground and maintain the necessary balance. Usually, the side of the motor vehicle body uses the upper rocker arm and the lower rocker arm, which are arranged up and down opposite to each other, to connect the wheel axles of the wheels with universal bearings. Joint, and a shock absorber is connected between the side of the car body and the lower rocker arm at the bottom, and then the combination of the steering joint of the wheel axle and the universal bearing at the end of the upper and lower rocker arms is used to provide a multi-directional rotation and direction change function , and with shock absorbers to provide cushioning elasticity, so that the wheels can move up and down in response to uneven ground and maintain the stability of the car body.

In the aforementioned motor vehicles, the steering knuckles of the axles of each wheel are respectively connected to the upper and lower rocker arms of the car body, which are arranged up and down opposite to each other through two sets of universal bearings. Provide anti-dropping protection mechanism for the steering joint mechanism where the bearing is connected to the wheel shaft. In particular, the end of the lower rocker arm of the car body is equipped with a universal shaft center bearing for the universal bearing, and a universal shaft is pivoted on the universal shaft shaft seat. The mandrel is pivotally connected to the bottom of the steering joint of the wheel axle with a universal mandrel, and the shock absorber is also connected to the lower rocker arm, so the load on the lower rocker arm is heavier, and the joint effect is located at the end of the lower rocker arm The structure of the steering joint of the pivot joint of the universal shaft center of the wheel shaft.

In the foregoing, when the center of the universal joint shaft located under the end of the lower rocker arm and the rotating joint of the wheel shaft are worn for a long time, due to The shaft center is pivotally connected to the steering joint of the wheel shaft from bottom to top. Because the lower rocker arm is subjected to gravity and the load acting on the lower rocker arm, the universal shaft center located under the lower rocker arm will loosen from the steering joint of the wheel shaft. While falling, once the lower rocker arm ends When the cardan shaft center under the end is completely separated from the steering joint of the wheel shaft, it will cause danger to the motor vehicle. Based on the driving safety of the motor vehicle, it is necessary to further improve this.

The object of the present invention is to provide an anti-drop protection device for the universal joint shaft, which solves the problem that the lower universal joint shaft at the end of the rocker arm under the vehicle body of the existing motor vehicle will fall off from the steering knuckle of the wheel axle.

In order to achieve the above-mentioned purpose, the anti-drop protection device for the universal joint shaft proposed by the present invention is used to install a steering joint of a wheel shaft of a motor vehicle and a lower universal joint shaft at the end of a lower rocker arm of a vehicle body. Between the bearing seats, the lower rocker arm is pivoted on the bottom of the steering joint from bottom to top with the lower universal shaft pivoted by the lower universal shaft bearing seat; wherein: the universal shaft anti-falling protection device It includes a protective member, which can be fixed to the steering joint of the wheel shaft, and the protective member surrounds the outer limit of the lower cardan shaft center bearing at the end of the lower rocker arm, and the protective member and the lower rocker arm There is an active distance between the ends to provide the rotation of the lower universal shaft bearing seat, and the movable distance in the height direction between the protective member and the lower universal joint shaft bearing seat is smaller than the lower universal joint shaft central bearing pivot The pivotal length provided in the connecting end below the steering knuckle is such that the lower rocker arm is maintained between the lower cardan hub shaft center in the lower cardan shaft center bearing and the steering knuckle of the wheel axle Pivot state.

With the invention of the anti-falling protection device for the cardan shaft, it can be applied between the steering knuckle of the wheel axle of a motor vehicle and the rocker arm under the vehicle body, wherein the protective member that can be fixed to the steering knuckle of the wheel axle is used to surround the The peripheral limit of the cardan shaft center seat under the end of the lower rocker arm keeps the center of the cardan shaft located in the cardan shaft center seat under the end of the lower rocker arm and the steering joint of the wheel shaft. In a pivoted state, an active distance is provided between the protective member and the steering knuckle with the center of rotation of the cardan shaft below the end of the lower rocker arm as the center of rotation. In this way, on the basis of maintaining the normal rotation of the lower rocker arm passing through the steering joint of the lower cardan shaft center pivoting wheel shaft in the lower cardan shaft center bearing seat, that is When the lower cardan shaft center in the cardan shaft center seat under the end of the lower rocker arm becomes loose due to wear and tear, the protective member of the cardan shaft center fall-off protection device can surround the The outer limit of the universal shaft center bearing seat under the end of the lower rocker arm, the lower universal shaft center seat maintains the original function of supporting the lower universal shaft center and rotating the lower universal shaft center, so that the lower universal shaft center The pivotal connection between the lower cardan shaft in the cardan shaft center seat of the rocker arm and the steering joint of the wheel shaft is maintained, so it can effectively prevent the steering of the lower cardan shaft center at the end of the lower rocker arm and the wheel shaft When the joint is detached, the risk of the motor vehicle falling off from the steering joint of the wheel shaft due to the cardan shaft under the lower rocker arm is reduced.

10: car body

11: Upper rocker arm

111: Upper cardan shaft center bearing seat

112: Upper cardan axis

12: lower rocker arm

121: Lower cardan shaft center bearing seat

122: Lower cardan axis

13: shock absorber

20: Wheels

21: Axle

210: Steering joint

211: upper connection end

212: lower connection end

30A: Cardan shaft anti-falling protection device

30B: Cardan shaft anti-falling protection device

31A: Protective components

31B: Protective components

311: Bar section

312: side bar section

32A: Fixed part

321A: connecting section

322A: Locking section

32B: Fixed part

33A: Fixed part

Fig. 1 is a three-dimensional schematic diagram of a preferred embodiment of the anti-falling protection device for the universal joint shaft of the present invention applied between the body and the wheels of a motor vehicle.

Fig. 2 is a three-dimensional schematic diagram of a preferred embodiment of the anti-falling protection device for the universal shaft center of the present invention shown in Fig. 1 .

Fig. 3 is a schematic side view plan view of the anti-falling protection device for the cardan shaft shown in Fig. 1 applied between the body and the wheels of a motor vehicle.

Fig. 4 is a three-dimensional schematic diagram of another preferred embodiment of the anti-falling protection device for the universal joint shaft of the present invention applied between the body and the wheels of another motor vehicle.

Fig. 5 is a three-dimensional schematic diagram of another preferred embodiment of the anti-falling protection device for the universal shaft center of the present invention shown in Fig. 4 .

Fig. 6 is a bottom perspective schematic view of another preferred embodiment of the anti-falling protection device for the cardan shaft shown in Fig. 4 applied between the body and the wheels of another motor vehicle.

FIG. 7 is a partially enlarged schematic diagram of FIG. 6 .

Fig. 8 is a side plan schematic diagram of another preferred implementation of the anti-falling protection device for the cardan shaft shown in Fig. 4 and Fig. 6 to Fig. 8 between the body and the wheel of another motor vehicle.

As shown in Fig. 1, Fig. 4 and Fig. 6, two preferred embodiments of the anti-drop protection device 30A and 30B for the universal joint shaft center of the present invention are respectively applied to different motor vehicles for reference. The motor vehicle includes a car body 10 and wheels 20 installed on the side of the car body 10, and the upper rocker arm 11 and the lower rocker arm 12 on the side of the car body 10 are respectively connected to the steering of the wheel shaft 21 of the wheel 20. Joint 210, wherein, the end of the upper rocker arm 11 has an upper cardan shaft center bearing seat 111, and an upper cardan shaft center 112 is pivotally arranged in the upper cardan bearing seat 111, and the lower rocker arm 12 has a lower cardan shaft center at its end. Cardan shaft bearing seat 121, the lower cardan shaft center bearing seat 121 pivotally sets the cardan shaft center 122, and the cardan shaft center 112 is located on the upper rocker arm 11 and is located under the lower rocker arm 12 The universal shaft 122 is pivotally arranged on the upper connecting end 211 and the lower connecting end 212 of the steering knuckle 210 of the axle 21 , and a shock absorber 13 is connected between the vehicle body 10 and the lower swing arm 12 . The anti-falling protection devices 30A and 30B for the universal shaft center are used to install the steering joint 210 of the wheel shaft 21, and at least provide protection for the universal shaft center 122 pivotally arranged under the bottom of the steering knuckle 210 and under the end of the rocker arm 12. Protection against falling off.

As shown in Fig. 1 and Fig. 4 and Fig. 6, it can be seen from the drawings that the universal shaft core anti-falling protection device 30A, 30B includes a protective member 31A, 31B, and the protective member 31A, 31B can be installed on the wheel shaft Between the steering knuckle 210 of 21 and the end of the lower rocker arm 12 of the vehicle body 10, the protective members 31A, 31B surround the outer limit of the lower cardan shaft center bearing 121 at the end of the lower rocker arm 12, so that the The pivotal state is maintained between the lower universal shaft center 122 in the lower universal shaft center bearing seat 121 and the lower connection end 212 of the steering knuckle 210, and the protective members 31A, 31B are connected to the end of the lower rocker arm 12 There is a rotating movable distance between the lower cardan shaft bearing seats 121, wherein the movable distance in the height direction between the protective members 31A, 31B and the lower cardan shaft bearing seats 121 is smaller than the lower cardan shaft center 122 is pivotally arranged at the pivot length in the connection end 212 below the steering knuckle 210 .

In the preferred embodiment shown in Figures 2 and 5, the protective members 31A, 31B include a guard bar segment 311 and two side bar segments 312, and the two side bar segments 312 extend from the two ends of the guard bar segment 311 toward the same side extension Stretching, the two side rod sections 312 are respectively provided with a fixed part 32A, 33A, 32B at one end away from the protective rod section 311, as shown in Fig. 1, Fig. 3 and Fig. 4, Fig. 6, and Fig. 7, by the The connecting parts 32A, 33A, 32B are fixed on the steering joint 210 of the wheel shaft 21 in conjunction with the locking elements.

In a preferred embodiment of the protective member 31A shown in FIG. 2 , one of the fixed parts 32A provided on a side bar section 312 is bent into an L-shaped part, and includes a connecting section 321A and A locking section 322A extending laterally from one end of the connecting section 321A, the connecting section 321A is fixed to the end of the side bar section 312 of the protective member 31A, the locking section 322A has at least one through hole, and the locking section 322A can be abutted on the steering knuckle 210 , and a screw is used as a locking element, and the locking element passes through the through hole of the locking section 322A to lock the fixed part 32A on the steering knuckle 210 of the wheel shaft 21 . The other fixed portion 33A provided on the other side bar segment 312 is a plate-shaped component and has a through hole. The other fixed portion 33A can abut against the steering knuckle 210. The fixing parts 32A and 33A are arranged at intervals, and the other fixing part 33A is locked on the steering knuckle 210 of the wheel shaft 21 by screws.

As shown in another preferred embodiment of the protective member 31B in FIG. 5, the fixed portion 32B is a ring formed by bending the end of the side bar section 312 away from the guard bar section 311, and the ring can fit It is provided on the bolt of the steering knuckle 210 , and the nut is used as a locking element to lock the fixing portion 32B on the steering knuckle 210 of the wheel shaft 21 .

As shown in Fig. 1, Fig. 3 and Fig. 4, Fig. 6 to Fig. 8, when the universal shaft core anti-falling protection device 30A, 30B of the present invention is applied to a motor vehicle, it is to use the universal shaft center anti-falling protection device 30A, 30B are fixed on the steering joint 210 of the wheel shaft 21, and the protective members 31A, 31B surround the lower cardan shaft center bearing seat 121 at the end of the lower rocker arm 12 with the lower cardan shaft center 122 to limit the outer side. , make the lower rocker arm 12 maintain a pivoted state between the lower cardan shaft 122 and the steering joint 210 of the wheel shaft 21, and provide the end of the lower rocker arm 12 between the protective members 31A, 31B and the steering knuckle 210 The lower cardan shaft center bearing seat 121 is the movable pitch of the rotation with the lower cardan shaft center 122 as the center of rotation.

In this way, on the basis of maintaining the lower cardan shaft bearing seat 121 at the end of the lower rocker arm 12 through the lower cardan shaft 122 pivotally connected to the steering joint 210 of the wheel shaft 21 to be able to rotate normally, the cardan shaft is used to protect against falling off. The devices 30A, 30B provide anti-falling effect on the lower cardan shaft center seat 121 at the end of the lower rocker arm 12, which is used to pivotally connect the lower cardan shaft center 122 of the steering joint 210, even if it is arranged under the end of the lower rocker arm 12 When the lower universal shaft center 122 in the universal shaft center bearing seat 121 becomes loose due to wear and tear and the lower connection end 212 of the steering joint 210 of the wheel shaft 21, the protective components of the universal shaft center fall-off protection devices 30A, 30B 31A, 31B can provide a support function because they can surround the peripheral limit of the universal shaft center bearing 121 under the end of the lower rocker arm 12, and the universal shaft center bearing 121 under the end of the lower rocker arm 12 can still maintain bearing. The original function of supporting the lower cardan shaft 122 and rotating the lower cardan shaft 122 ensures the steering joint between the lower cardan shaft 122 and the wheel shaft 21 in the cardan shaft center bearing seat 121 under the lower rocker arm 12 210 maintains the necessary pivotal state, so it can effectively prevent the lower cardan shaft center 122 located at the end of the lower rocker arm 12 from being separated from the steering joint 210 of the wheel shaft 21, and reduce the risk of motor vehicles being under the lower rocker arm 12. The danger of the cardan shaft center 122 coming off from the steering knuckle 210 of the wheel shaft 21 .

10: car body

11: Upper rocker arm

111: Upper cardan shaft center bearing seat

12: lower rocker arm

121: Lower cardan shaft center bearing seat

122: Lower cardan axis

13: shock absorber

20: Wheels

210: Steering joint

211: upper connection end

212: lower connection end

30A: Cardan shaft anti-falling protection device

Claims (4)

An anti-drop protection device for a universal shaft center, which is used to be installed between a steering joint of a wheel shaft of a motor vehicle and a lower universal shaft center bearing seat at the end of a lower rocker arm of a vehicle body, the lower rocker arm And the lower universal shaft pivoted by the lower universal shaft bearing seat is pivoted on the bottom of the steering joint from bottom to top; wherein: the universal shaft anti-falling protection device includes a protective member, the protective member The steering knuckle that can be fixed to the wheel shaft, the protective member surrounds the outer limit of the lower universal shaft center seat at the end of the lower rocker arm, and the lower universal shaft is provided between the protective member and the end of the lower rocker arm. A movable distance for rotating toward the shaft center bearing seat, and the movable distance between the protective member and the lower cardan shaft center seat in the height direction is smaller than the lower cardan shaft center pivotally arranged under the steering knuckle The pivot joint length in the connection end makes the lower rocker arm maintain a pivot joint state between the lower universal joint shaft center in the lower universal joint shaft center bearing seat and the steering joint of the wheel shaft. The anti-falling protection device for the universal shaft center according to claim 1, wherein the protective member has a protective rod section and two side rod sections, and the two side rod sections extend from both ends of the protective rod section to the same side , and the ends of the two side bar sections away from the guard bar section are respectively provided with a fixed connection part, and the fixed connection part is combined with a locking element to be fixed on the steering joint of the wheel shaft. The anti-falling protection device for the universal shaft center according to claim 2, wherein the fixed part is a part bent into an L shape, and includes a connecting section and a lock extending laterally from one end of the connecting section. section, the connecting section is fixedly connected to the end of the side bar section of the protective member, the locking section has at least one perforation, and the locking section can abut on the steering knuckle, and the locking element is a screw , and pass through the perforation of the locking section to lock the fixed part on the steering joint of the wheel shaft. The anti-falling protection device for the universal shaft center according to claim 2, wherein the fixed part is a loop formed by bending the end of the side bar section away from the protection bar section, and the loop can be sleeved at the On the bolts of the steering knuckle of the wheel axle, the locking element is a nut, and locks the fixing part on the steering knuckle.

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