JPH061117U - Supporting structure for automobile steering gear box - Google Patents

Abstract

(57) [Abstract] [Purpose] To effectively improve the support strength of the steering gear box with respect to the side frame so that the steering wheel can accurately respond to the steering operation. [Structure] A lower arm bracket 8 for suspension is attached to a vehicle body frame 1. A gear box bracket 19 that supports the steering gear box 18 is attached to the vehicle body frame 1. A reinforcing member 32 for connecting the gear box bracket 19 to the lower arm bracket 8 is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure for reinforcing a steering gear box that connects a steering wheel side and a steered wheel side, when the steering gear box is supported by a vehicle body frame.

[0002]

[Prior art]

 Conventionally, as a supporting and reinforcing structure of a steering gear box for automobiles, there is one disclosed in Japanese Utility Model Laid-Open No. 63-161075. According to this, a pipe-shaped bracket is attached to a side frame that constitutes a vehicle body frame, and a steering gear box is screwed to the bracket. Further, according to the above configuration, when the steering handle is normally steered, the operating force is transmitted to the steered wheels via the gear device in the steering gear box, and the steering operation is performed in proportion to the steering operation. The steering wheel is steered.

[0003]

[Problems to be solved by the device]

 By the way, if the supporting strength of the steering gear box for the side frame is insufficient, the steering gear box is slightly displaced with respect to the side frame due to reaction force during steering, etc. There is a risk that the response will be incorrect and the sense of unity with the vehicle body will be impaired. Therefore, it is desired to more sufficiently improve the support strength of the steering gear box with respect to the side frame.

[0004]

[The purpose of the device]

 This invention was made in view of the above circumstances, and effectively improves the support strength of the steering gear box with respect to the side frame, and makes the steering wheel respond accurately with respect to the steering operation. The purpose is to do so.

[0005]

[Means for Solving the Problems]

 The feature of the present invention for achieving the above-mentioned object is that in a vehicle in which a lower arm bracket for a suspension is attached to a vehicle body frame and a gear box bracket for supporting a steering ring gearbox is attached to the vehicle body frame. The point is that a reinforcing member for connecting the gear box bracket to the lower arm bracket is provided.

[0006]

[Work]

 The operation of the above configuration is as follows. In a vehicle in which a lower arm bracket 8 for suspension is attached to the vehicle body frame 1 and a gear box bracket 19 for supporting the steering gear box 18 is attached to the vehicle body frame 1, the lower arm bracket 8 and the gear box bracket 19 are joined together. A reinforcing member 32 is provided. In this case, the lower arm bracket 8 supports the wheels with respect to the vehicle body frame 1 and has sufficient strength. Therefore, as described above, the gear box bracket 19 is connected to the lower arm bracket 8 by the reinforcing member 32. Then, the supporting strength of the steering gear box 18 with respect to the side frame 2 is effectively improved. Therefore, it is possible to prevent the steering gear box 18 from being displaced with respect to the vehicle body frame 1 due to a reaction force during steering.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In the figure, reference numeral 1 is a vehicle body frame, and arrow Fr in the figure indicates the front of the vehicle. The left and right described below refer to the direction toward the front. The vehicle body frame 1 has a pair of left and right side frames 2 and 2. Each side frame 2 extends in the front-rear direction and is firmly connected to each other by a cross member. Each of the side frames 2 has a box-shaped cross section, and is composed of upper and lower plates 3 and 4, and inner and outer plates 5 and 6. The side frame 2 shown in the figure is on the right side. Lower arm brackets 8 forming front wheel suspensions are attached to the front portions of the side frames 2. A lower arm 10 is pivotally supported on the lower arm bracket 8 via a torsion bar 9 so as to be vertically swingable, and a front wheel as a steering wheel is supported on a swinging end of the lower arm 10 via a knuckle arm.

The lower arm bracket 8 is made of sheet metal, and is composed of front and rear plates 12 and 13 that face each other in the front-rear direction, and a connecting plate 14 that connects these to each other. The upper ends of the outer sides of the front plate 12 and the rear plate 13 are firmly welded to the lower surface of the lower plate 4 of the side frame 2. Same as above, bearing holes 15 and 15 are formed in the lower portions of the inner portions of the front plate 12 and the rear plate 13, respectively, and one end of the torsion bar 9 is rotatably inserted into these bearing holes 15 and 15, The other end of the torsion bar 9 extends rearward and is fixed to the side frame 2. The lower arm 10 is fixed to one end of the torsion bar 9, and the lower arm 10 is pivotally supported by the lower arm bracket 8 as described above.

Reference numeral 18 denotes a steering gear box that constitutes the steering device 17, and the steering gear box 18 is screwed to the right side frame 2 shown in the drawings of both side frames 2 via a gear box bracket 19. ing. An input shaft 20 is provided so as to project rearward from an upper portion of the steering gear box 18, and the input shaft 20 is connected to a steering handle via a universal joint shaft. An output shaft 21 is provided so as to project from the lower end of the steering gear box 18. A pitman arm 22 is attached to the output shaft 21, and the rotating end of the pitman arm 22 is connected to the front wheel knuckle arm via a tie rod 23 or the like.

Further, the input shaft 20 and the output shaft 21 are connected to each other by a gear device housed in the steering gear box 18, and when the steering handle is steered, the operating force is input to the input shaft 20. It is transmitted to the front wheels via the shaft 20, the gear device in the steering gear box 18, the output shaft 21, the pitman arm 22, the tie rods 23, etc., and the front wheels are steered as much as the above steering operation. There is. In the above case, the pitman arm 22 is covered and protected from below by the inner portion of the lower arm bracket 8.

The gear box bracket 19 is provided at substantially the same position as the lower arm bracket 8 in the front-rear direction. The gear box bracket 19 includes a base plate 24 provided so as to make surface contact with the surface of the inner plate 5 of the side frame 2, and a support plate 25 projecting from the upper part of the base plate 24 toward the outer side of the vehicle body. I have it. The mounting seat 18a of the steering gear box 18 is screwed to the front upper portion of the base plate 24 by a bolt 27 protruding from the front upper portion of the base plate 24 and a nut 28 screwed to the bolt 27. Also, a mounting seat 18a of the steering gear box 18 is screwed to the rear upper part of the base plate 24 by a nut 29 welded to the rear upper part of the base plate 24 and a bolt 30 screwed onto the nut 29. ing. The nut 29 and the bolt 30 may be omitted. The support plate 25 is joined and welded to the upper surface of the upper plate 3 of the side frame 2. The lower end of the base plate 24 is welded to the upper ends of the front plate 12 and the rear plate 13 of the lower arm bracket 8.

In the above structure, a reinforcing member 32 for connecting the gear box bracket 19 to the lower arm bracket 8 is provided. The reinforcing member 32 has a pair of front and rear reinforcing pipes 33, 33 extending in the left-right direction. The reinforcing pipes 33, 33 have through holes 34 formed in the inner plate 5 and the outer plate 6 of the side frame 2, respectively. It penetrates through 34. The inner ends of the reinforcing pipes 33, 33 are inserted into the base plate 24 and welded to the base plate 24.

Reference numeral 35 denotes a reinforcing plate, which is located outside the side frame 2. A pair of front and rear mounting holes 36, 36 are formed in the upper portion of the reinforcing plate 35, and the outer ends of the reinforcing pipes 33, 33 are fitted and welded into the mounting holes 36, 36. The upper part of the reinforcing plate 35 is welded to the outer plate 6 of the side frame 2, and the front and rear edges of the lower part of the reinforcing plate 35 are the outer edges of the front plate 12 and the rear plate 13 of the lower arm bracket 8. It is welded. Then, the mounting seat 18a of the steering gear box 18 is screwed to each reinforcing pipe 33 by a bolt 38 inserted into each reinforcing pipe 33 and a nut 39 screwed to this bolt 38. Thus, the gear box bracket 19 is connected to the lower arm bracket 8 by the reinforcing member 32.

The through holes 34 are made considerably larger than the reinforcing pipe 33, so that the reinforcing pipe 33 can be easily inserted into the through hole 34. The reinforcing pipes 33 are also inserted into the through holes 34 and then welded to the outer plate 6.

The inner ends of the reinforcing pipes 33, 33 project less than the inner side surface of the base plate 24, and the steering gear box 18 is screwed by the protrusions at the screwed portions of the bolts 27, 30. A washer 40 is provided between the mounting seat 18a of FIG.

[0016]

[Effect of device]

 According to this invention, a lower arm bracket for suspension is attached to the vehicle body frame, and a vehicle having a gear box bracket for supporting the steering gear box is attached to the vehicle body frame, the reinforcing member for connecting the gear box bracket to the lower arm bracket is provided. It is provided. In this case, the lower arm bracket supports the wheels with respect to the vehicle body frame and has sufficient strength. Therefore, when the lower arm bracket is connected to the gear box bracket by the reinforcing member as described above, The support strength of the steering gear box against the side frame is effectively improved. Therefore, the steering gear box is prevented from displacing with respect to the vehicle body frame due to reaction force during steering, etc. A sense of unity will be secured.

[Brief description of drawings]

FIG. 1 is a rear view.

FIG. 2 is a plan view.

FIG. 3 is a side view.

FIG. 4 is an exploded perspective view.

[Explanation of symbols]

 1 Body Frame 2 Side Frame 8 Lower Arm Bracket 10 Lower Arm 18 Steering Gear Box 19 Gear Box Bracket 32 Reinforcement Member

Claims (1)

[Scope of utility model registration request] 1. A vehicle in which a lower arm bracket for suspension is attached to a vehicle body frame, and a gear box bracket for supporting a steering gear box is attached to the same vehicle body frame, and a reinforcing member for connecting the gear box bracket to the lower arm bracket is provided. Support structure for automobile steering gear box.