CN213862407U

CN213862407U - Straight pull rod arm

Info

Publication number: CN213862407U
Application number: CN202022623237.9U
Authority: CN
Inventors: 隋家海; 秦刚
Original assignee: Shandong Shizheng Industrial Technology Co ltd
Current assignee: Shandong Shizheng Industrial Technology Co ltd
Priority date: 2020-11-13
Filing date: 2020-11-13
Publication date: 2021-08-03
Anticipated expiration: 2030-11-13

Abstract

The utility model discloses a drag link arm, including fixing base and pillow block, connect through the linkage segment between fixing base and the pillow block, its structural feature is that the fixed orifices has been seted up to the horizontal front end symmetry of fixing base, be equipped with the groove of lining up that link up fixing base up end and terminal surface down on the fixing base between the fixed orifices, the spread groove that sets up with the horizontal direction of lining up groove intercommunication and edge fixing base is seted up on the upper portion of fixing base, the horizontal rear end of spread groove sets up with the horizontal rear end parallel and level of fixing base, the linkage segment is from horizontal front end to horizontal rear end tilt up setting, the horizontal rear end of linkage segment is to indulging rear end bending connection to pillow block, set up big end down's taper hole on the pillow block. The utility model discloses joint strength is better, and stress concentration reduces, effectively improves arm body intensity, improves the life and the security of the arm body, and the part when avoiding installing interferes.

Description

Straight pull rod arm

Technical Field

The utility model relates to a drag link arm.

Background

In the process of driving, heavy truck vehicles need to change their driving direction frequently according to the intention of the driver, i.e. so-called vehicle steering. In the case of wheeled vehicles, steering of the vehicle is achieved by a driver by means of a set of dedicated mechanisms which deflect the steering wheels of the steering axle of the vehicle at a certain angle relative to the longitudinal axis of the vehicle. When the automobile runs in a straight line, the steering wheel is always subjected to the action of lateral interference force on the road surface and automatically deflects to change the running direction. In this case, the driver can also turn the steered wheels in the opposite direction by using the mechanism, so that the vehicle can return to the original driving direction. The special mechanism for changing or restoring the driving direction of the automobile is called an automobile steering system. Therefore, the steering system of the vehicle has a function of ensuring that the vehicle can be steered to travel at the will of the driver. The function of the drag link arm in the steering system is to transfer the force and motion from the steering rocker arm to the steering ladder arm (or knuckle arm). The force borne by the drag link arm has both tension and pressure, so that the drag link arm needs to be made of high-quality special steel to ensure reliable work. The existing straight pull rod arm is generally in a straight rod shape, and the straight pull rod arm is provided with the mounting hole, so that the straight pull rod arm is difficult to mount and easy to interfere when in use, and has low strength and easy fracture, thereby influencing the driving safety. In the prior art, a second sinking groove in a drag link arm (application number: 201620961516.7) extends from a front mounting section to a connecting section, so that the strength of the connecting section is reduced, the service life of the drag link arm is influenced, and meanwhile, when a pillow block is mounted, the connecting section is easily interfered by other parts, so that the mounting is inconvenient.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide a drag link arm, joint strength is better, and stress concentration reduces, effectively improves arm body intensity, improves the life and the security of the arm body, and the part when avoiding installing interferes.

In order to solve the technical problem, the utility model discloses a fixing base and pillow block, the fixing base with connect through the linkage segment between the pillow block, its structural feature is the fixed orifices has been seted up to the horizontal front end symmetry of fixing base, be equipped with on the fixing base between the fixed orifices and link up the groove that link up of fixing base up end and lower terminal surface, the upper portion of fixing base seted up with link up the groove intercommunication and follow the spread groove that the horizontal direction of fixing base set up, the horizontal rear end of spread groove with the horizontal rear end parallel and level of fixing base sets up, the linkage segment is from horizontal front end to horizontal rear end tilt up setting, the horizontal rear end of linkage segment is to the vertical rear end bending connection to the pillow block, the big-end-down's taper hole has been seted up on the pillow block.

By adopting the structure, when the through groove and the connecting groove are matched with the straight pull rod arm in shape, stress concentration is avoided, the total weight of the arm body can be reduced, an interference prevention area can be formed, the installation is convenient, interference with other parts is not easy to occur during use, the connection groove is parallel and level with the horizontal rear end of the fixing seat, so that the integrity of the connecting section is ensured, the strength of the arm body is effectively improved, the service life and the safety of the arm body are improved, the horizontal rear end of the connecting section is connected to the pillow block in a bending mode towards the longitudinal rear end, the pillow block is effectively prevented from interfering with other parts during installation, the installation and the use of the straight pull rod arm are influenced, the insertion of the pin shaft can be facilitated by the taper hole formed in the pillow block, the pin shaft is inserted from the lower part of the taper hole, and the insertion of a plurality of directions can be realized due to the fact that the lower part of the taper hole is a large hole.

The through groove is smoothly transited to the connecting groove, the longitudinal width of the through groove gradually decreases from the transverse front end to the transverse rear end, the cross section of the connecting groove is rectangular, and the lower part of the connecting groove is upwards inclined from the transverse front end to the transverse rear end.

The fixing base becomes the rectangle setting, the fixed orifices follows the length direction setting of fixing base, the length direction's of fixing base both ends are equipped with the segmental arc, the fixed orifices with the segmental arc is concentric the setting.

The center line of the fixed seat is parallel to the axis of the pillow block, the circle center of the pillow block and the center of the fixed seat are not on the same straight line arranged along the transverse direction in the overlooking direction, and the horizontal height of the pillow block is higher than that of the fixed seat in the overlooking direction.

The width of the connecting section is reduced from the transverse front end to the transverse rear end in sequence, one side of the fixed seat is in arc transition to the transverse front end of the connecting section, and the transverse rear end of the connecting section is in arc transition to one side of the pillow block in a bending way from the transverse rear end to the longitudinal rear end in the overlooking direction.

Drawings

The invention will be further explained with reference to the following figures and examples:

fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic top view of the structure of FIG. 1

FIG. 3 is a left side view of the fixing base in FIG. 2;

fig. 4 is a schematic structural view of the present invention in use.

In the figure: 1-a fixed seat, 2-a pillow block, 3-a connecting section, 4-a fixed hole, 5-a through groove, 6-a connecting groove, 7-an arc section and 8-a taper hole.

Detailed Description

For convenience of description, the left side in fig. 1 is taken as the horizontal front, the upper side is taken as the upper side, and the direction perpendicular to the paper surface is taken as the longitudinal front. Referring to fig. 1-4, the drag link arm comprises a fixed seat 1 and a pillow block 2, the fixed seat 1 is connected with the pillow block 2 through a connecting section 3, a taper hole 8 with a small upper part and a large lower part is formed in the pillow block 2, the taper hole 8 formed in the pillow block 2 can facilitate the insertion of a pin shaft, the pin shaft is inserted from the lower part of the taper hole 8, and the insertion in multiple directions can be realized due to the fact that the lower part of the taper hole 8 is a large hole. Fixing base 1 becomes the rectangle setting, fixed orifices 4 have been seted up to the horizontal front end symmetry of fixing base 1, fixed orifices 4 are followed the length direction setting of fixing base 1, the length direction's of fixing base 1 both ends are equipped with segmental arc 7, fixed orifices 4 with segmental arc 7 concentric circles sets up. The arc-shaped section 7 can avoid the interference of other parts when the fixing seat 1 is installed, the fixing hole 4 and the arc-shaped section 7 are concentrically arranged, so that the fixing hole 4 can be conveniently machined, the circle center of the fixing hole 4 is determined by determining the circle center of the arc-shaped section 7, and the subsequent machining of the fixing hole 4 is facilitated. The fixing base 1 between the fixed orifices 4 is provided with a through groove 5 which runs through the upper end surface and the lower end surface of the fixing base 1, the upper part of the fixing base 1 is provided with a connecting groove which is communicated with the through groove 5 and is arranged along the transverse direction of the fixing base 1, the through groove 5 is in smooth transition to the connecting groove 6, the longitudinal width of the through groove 5 from the transverse front end to the transverse rear end is gradually reduced, the cross section of the connecting groove 6 is rectangular, the lower part of the connecting groove is inclined upwards from the transverse front end to the transverse rear end, two sides of the connecting groove in the longitudinal direction are in smooth transition to the upper part of the fixing base, the transverse rear end of the connecting groove is flush with the transverse rear end of the fixing base 1, and the smooth transition connection of the through groove 5 and the connecting groove 6 is adaptive to the shape of the arm body and avoids stress concentration. Through the setting of groove 5 and spread groove 6, both can reduce the total weight of the arm body, still can form and prevent interfering the region, be difficult for taking place to interfere with other parts during simple to operate, use because the horizontal rear end of spread groove with the horizontal rear end parallel and level of fixing base 1 sets up to the completion of linkage segment 3 has been guaranteed, effectively improves arm body intensity, improves the life and the security of the arm body. The linkage segment 3 sets up from horizontal front end to horizontal rear end tilt up, the horizontal rear end of linkage segment 3 is to the longitudinal rear end crooked be connected to the pillow block 2, linkage segment 3 reduces in proper order from horizontal front end to horizontal rear end width, one side circular arc of fixing base 1 passes through the horizontal front end of linkage segment 3, in overlooking the direction the horizontal rear end of linkage segment 3 is to the longitudinal rear end crooked circular arc transition to one side of pillow block 2. The center line of the fixed seat 1 is parallel to the axis of the pillow block 2, the connection of the connecting section 3 and the pillow block 2 in the overlooking direction enables the circle center of the pillow block 2 and the center of the fixed seat 1 not to be on the same straight line arranged along the transverse direction, and the horizontal height of the pillow block 2 in the overlooking direction is higher than that of the fixed seat 1. The central line of the fixed seat 1 is parallel to the axis of the pillow block 2, so that the installation of the straight pull rod arm is facilitated, and the axis of the pillow block 2 and the central line of the fixed seat 1 deviate to avoid the interference of other parts during installation. This drag link arm accessible casting integrated into one piece, fixing base 1 smooth transition to

linkage segment

3 and 3 smooth transitions to the platform 2 and all be convenient for the drawing of patterns of drag link arm.

When the utility model is used, the through groove 5 and the connecting groove 6 are matched with the shape of the straight pull rod arm, simultaneously, the stress concentration is avoided, not only can reduce the total weight of the arm body, but also can form an interference-proof area, is convenient to install and is not easy to interfere with other parts when in use, because the transverse rear end of the connecting groove is flush with the transverse rear end of the fixed seat 1, the integrity of the connecting section 3 is ensured, the strength of the arm body is effectively improved, the service life and the safety of the arm body are improved, the connection section 3 is connected to the pillow block 2 in a bending mode from the transverse rear end to the longitudinal rear end, so that interference of other parts when the pillow block 2 is installed is effectively avoided, the installation and the use of the straight pull rod arm are affected, the conical hole 8 formed in the pillow block 2 can facilitate the insertion of the pin shaft, the pin shaft is inserted from the lower portion of the conical hole 8, and the insertion in multiple directions can be achieved due to the fact that the lower portion of the conical hole 8 is a large hole. The utility model discloses joint strength is better, and stress concentration reduces, effectively improves arm body intensity, improves the life and the security of the arm body, and the part when avoiding installing interferes.

Claims

1. A drag link arm comprises a fixed seat (1) and a pillow block (2), wherein the fixed seat (1) is connected with the pillow block (2) through a connecting section (3), and the drag link arm is characterized in that the transverse front end of the fixed seat (1) is symmetrically provided with fixed holes (4), the fixed seat (1) between the fixed holes (4) is provided with a through groove (5) which penetrates through the upper end surface and the lower end surface of the fixed seat (1), the upper part of the fixed seat (1) is provided with a connecting groove which is communicated with the through groove (5) and is arranged along the transverse direction of the fixed seat (1), the transverse rear end of the connecting groove is flush with the transverse rear end of the fixed seat (1), the connecting section (3) is upwards inclined from the transverse front end to the transverse rear end, and the transverse rear end of the connecting section (3) is connected to the pillow block (2) in a bending way, the pillow block (2) is provided with a taper hole (8) with a small upper part and a big lower part.

2. Drag link arm according to claim 1, characterized in that the through slot (5) is rounded to the connecting slot (6), the longitudinal width of the through slot (5) decreases from the transverse front end to the transverse rear end, the connecting slot (6) has a rectangular cross-section, and the lower part of the connecting slot is arranged obliquely upwards from the transverse front end to the transverse rear end.

3. The drag link arm according to claim 1, wherein the fixing base (1) is arranged in a rectangular shape, the fixing hole (4) is arranged along the length direction of the fixing base (1), arc-shaped sections (7) are arranged at two ends of the fixing base (1) in the length direction, and the fixing hole (4) and the arc-shaped sections (7) are arranged concentrically.

4. Drag link arm according to claim 1, characterized in that the centre line of the holder (1) is arranged parallel to the axis of the pillow block (2), the centre of the pillow block (2) in top view and the centre of the holder (1) are not on the same straight line arranged in the transverse direction, the level of the pillow block (2) in front view being higher than the level of the holder (1).

5. Drag link arm according to claim 1, characterized in that the connecting section (3) decreases in width from the transverse front end to the transverse rear end in the following order, the arc of one side of the fastening base (1) transitions into the transverse front end of the connecting section (3), and the arc of the transverse rear end to the longitudinal rear end of the connecting section (3) transitions into the side of the pillow block (2) in the top view.