Self-locking mechanism

Abstract

The utility model relates to the field of automobile parts, and discloses a self-locking mechanism which comprises a first fixing plate fixed to the side surface of a bottom plate through a plurality of bolts. The connecting shaft is fixedly arranged on one side of the top of the fixed plate I; the self-locking plate is mounted on the outer surface of the connecting shaft; the self-locking groove is formed in the bottom of one end of the self-locking plate; the connecting plate is fixed with the fixed plate I through a screw; and the hydraulic rod is mounted in the connecting plate. The self-locking mechanism is installed on the side wall of the bottom plate, the positioning column is installed on the second supporting arm, when the large arm is in a recovery state, the self-locking mechanism can limit the second supporting arm, the problem that the large arm is directly unfolded due to pressure relief of the oil cylinder is avoided, the locking effect of the large arm is improved, and the service life of the large arm is prolonged. And meanwhile, the possibility of traffic accidents caused by automatic unfolding of the big arm is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile accessories, in particular to a self-locking mechanism. Background Art

[0002] Cars have become an important means of transportation in daily life. Some cars with high chassis, especially commercial vehicles, SUVs, off-road vehicles, etc., generally need to be equipped with side pedals to facilitate people getting on and off the car because their bottoms are far from the ground. Side pedals are generally fixed on both sides of the car, which not only affects the appearance, but also affects the vehicle's passability. Therefore, electric side pedals that can control the extension and retraction of the pedals are becoming more and more widely used.

[0003] The electric side step is composed of a pedal, telescopic mechanism, drive motor assembly, controller, control harness and installation accessories. The controller of the electric side step mainly controls the motor through the door signals of the four doors, allowing the pedal to extend and retract at the appropriate time. However, after the electric side step is retracted, the current side step can usually only be fixed by the telescopic mechanism. However, the side step itself is heavy. When the telescopic mechanism has problems, it is easy to cause the side step to automatically deploy. When the side step is deployed, the width of the car increases. When the driver judges the width of the car body according to inertial thinking, it is easy to cause a traffic accident. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a self-locking mechanism to solve the problems mentioned in the above background.

[0005] The utility model provides the following technical solutions:

[0006] The utility model discloses a self-locking mechanism, comprising a bottom plate,

[0007] A fixing plate 1, fixed to the side surface of the bottom plate by a plurality of bolts;

[0008] A connecting shaft is fixedly arranged on one side of a top portion of the fixing plate;

[0009] Self-locking version, installed on the outer surface of the connecting shaft;

[0010] A self-locking groove is provided at the bottom of one end of the self-locking plate;

[0011] A connecting plate, fixed to a fixing plate by screws;

[0012] Hydraulic rod, installed inside the connecting plate.

[0013] Furthermore, a support arm 1 is mounted on the top of the base plate via a hinge.

[0014] Furthermore, a second support arm is installed at the middle position of the bottom plate via a rotating shaft.

[0015] Furthermore, one end of the support arm away from the bottom plate is movably connected to the large arm.

[0016] Furthermore, an oil cylinder is installed between the first support arm and the second support arm.

[0017] Furthermore, a torsion spring is installed on the surface of the connecting shaft between the self-locking plate and the fixed plate one.

[0018] Furthermore, a side of the support arm 2 close to the fixing plate 1 is fixed with the fixing plate 2 by means of screws, and a side of the fixing plate 2 away from the support arm 2 is fixed with a positioning column.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The utility model installs a self-locking mechanism on the side wall of the bottom plate and installs a positioning column on the second supporting arm. When the boom is in a retracted state, the self-locking mechanism can restrict the second supporting arm to avoid the problem of direct expansion of the boom due to pressure relief of the oil cylinder, thereby improving the locking effect of the boom and reducing the possibility of traffic accidents caused by automatic expansion of the boom. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the expanded state of the utility model;

[0022] Figure 2 This is a structural diagram of the recycling state of the utility model;

[0023] Figure 3 It is a front three-dimensional structural diagram of the self-locking mechanism in the utility model;

[0024] Figure 4 It is a rear three-dimensional structural diagram of the self-locking mechanism in the utility model;

[0025] The numbers in the figure represent: 1. Base plate; 2. Support arm one; 3. Support arm two; 4. Upper arm; 5. Cylinder; 6. Fixed plate one; 7. Connecting shaft; 8. Self-locking plate; 9. Self-locking groove; 10. Connecting plate; 11. Hydraulic rod; 12. Torsion spring; 13. Fixed plate two; 14. Positioning column. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-4 , including a base plate 1, the base plate 1 is fixed to the car, a fixing plate 6, fixed to the side surface of the base plate 1 by a plurality of bolts; a connecting shaft 7, fixedly arranged on one side of the top of the fixing plate 6; a self-locking plate 8, installed on the outer surface of the connecting shaft 7, baffles are arranged on both sides of the self-locking plate 8, the baffles are fixed to the connecting shaft 7 to prevent the self-locking plate 8 from moving, and nuts are fixed to the outer side of the baffles on the side of the self-locking plate 8 away from the fixing plate 6; a self-locking groove 9 is provided at the bottom of one end of the self-locking plate 8; a connecting plate 10 is fixed to the fixing plate 6 by screws; a hydraulic rod 11 is installed inside the connecting plate 10, the telescopic end of the hydraulic rod 11 extends out from the movable space provided at the top of the connecting plate 10, and a rotating shaft is fixed on the top of the telescopic end of the hydraulic rod 11, which is movably connected to the end of the self-locking plate 8 away from the self-locking groove 9 through the rotating shaft. A torsion spring 12 is installed on the surface of the connecting shaft 7 between the self-locking plate 8 and the fixed plate 6. One end of the torsion spring 12 is fixed to the fixed plate 6, and the other end is fixed to the bottom of the self-locking plate 8. When the torsion spring 12 is in a relaxed state, the end of the self-locking plate 8 close to the self-locking groove 9 is lifted by the torsion spring 12. The fixed plate 6, the connecting shaft 7, the self-locking plate 8, the self-locking groove 9, the connecting plate 10, the hydraulic rod 11 and the torsion spring 12 can form a complete self-locking mechanism.

[0028] A support arm 2 is installed on the top of the bottom plate 1 through a hinge. A support arm 2 3 is installed in the middle of the bottom plate 1 through a rotating shaft, and a fixed plate 6 is located between the support arm 1 2 and the support arm 2 3. The end of the support arm 1 2 away from the bottom plate 1 is movably connected to the big arm 4, and the support arm 2 3 is also movably connected to the big arm 4. An oil cylinder 5 is installed between the support arm 1 2 and the support arm 2 3, and the telescopic end of the oil cylinder 5 is fixed to the big arm 4, and the other end is fixed to the bottom plate 1. The telescopic movement of the oil cylinder 5 can control the support arm 1 2 and the support arm 2 3 to drive the big arm 4 to perform bending movement.

[0029] A fixing plate 2 13 is fixed to one side of the support arm 2 3 close to the fixing plate 1 6 by screws, and a positioning column 14 is fixed to one side of the fixing plate 2 13 away from the support arm 2 3, and a section of the outer diameter of the positioning column 14 corresponding to the position of the self-locking groove 9 matches the inner diameter of the self-locking groove 9, and a section of the outer diameter of the positioning column 14 close to the fixing plate 2 13 is larger. When the oil cylinder 5 retracts, the support arm 1 2 and the support arm 2 3 are also gradually reset. After the reset, the support arm 2 3 gradually approaches the self-locking plate 8. When the self-locking plate 8 touches the positioning column 14, a section of the positioning column 14 with a thicker outer diameter preferentially contacts the end of the torsion spring 12 away from the fixing plate 1 6. Through the continuous approach of the support arm 2 3, the positioning column 14 exerts an effect on the torsion spring 12 The pressure causes the two ends of the torsion spring 12 to approach each other, and because one end of the torsion spring 12 is fixed to the fixed plate 6, when the two ends of the torsion spring 12 approach each other, the end of the torsion spring 12 drives the self-locking plate 8 to start moving downward. When the end of the self-locking plate 8 close to the self-locking groove 9 moves downward, the self-locking groove 9 opened on the surface of the self-locking plate 8 clamps the positioning column 14 in the groove, and the end of the self-locking plate 8 away from the self-locking groove 9 begins to pull the hydraulic rod 11 to lengthen, and the self-locking of the support arm 2 3 is completed through the clamping connection between the self-locking groove 9 and the positioning column 14 and the resistance of the hydraulic rod 11. When the oil cylinder 5 drives the big arm 4 to run, when the power of the support arm 2 3 is greater than the resistance of the self-locking mechanism, the positioning column 14 automatically disengages from the self-locking groove 9.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-locking mechanism, comprising a base plate (1), It is characterized in that Also included are: A fixing plate (6) fixed to the side surface of the bottom plate (1) by a plurality of bolts; A connecting shaft (7) is fixedly mounted on one side of the top of the fixing plate (6); A self-locking plate (8) mounted on the outer surface of the connecting shaft (7); A self-locking groove (9) is provided at the bottom of one end of the self-locking plate (8); A connecting plate (10) is fixed to a fixing plate (6) by screws; The hydraulic rod (11) is installed inside the connecting plate (10).

2. A self-locking mechanism according to claim 1, characterized in that: A support arm 1 (2) is mounted on the top of the base plate (1) via a hinge.

3. A self-locking mechanism according to claim 1, characterized in that: A second support arm (3) is installed at the middle position of the bottom plate (1) via a rotating shaft.

4. A self-locking mechanism according to claim 2, characterized in that: One end of the support arm 1 (2) away from the bottom plate (1) is movably connected to a large arm (4).

5. A self-locking mechanism according to claim 3, characterized in that: An oil cylinder (5) is installed between the first supporting arm (2) and the second supporting arm (3).

6. A self-locking mechanism according to claim 1, characterized in that: A torsion spring (12) is installed on the surface of the connecting shaft (7) between the self-locking plate (8) and the fixed plate 1 (6).

7. A self-locking mechanism according to claim 3, characterized in that: A fixing plate 2 (13) is fixed to the side of the supporting arm 2 (3) close to the fixing plate 1 (6) by means of screws, and a positioning column (14) is fixed to the side of the fixing plate 2 (13) away from the supporting arm 2 (3).

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