Locking mechanism for lifting inclinable adjustment of steering gear box of engineering truck

Abstract

The utility model relates to the technical field of steering gears, in particular to a locking mechanism capable of adjusting lifting of a steering gear of an engineering truck in an inclinable mode. A wing plate of an upper pipe column limiting plate is fixed to the pipe wall of an upper pipe column. A waist plate of the upper U-shaped frame is fixed with the lower end of the upper tubular column; a waist plate of the lower U-shaped frame is fixed with the upper end of the lower tubular column; the wing plate of the upper U-shaped frame is rotationally connected with the lower end of the wing plate of the lower U-shaped frame through a rotating shaft, and the rotating shaft is connected with a first locknut; one wing plate of the lower U-shaped frame is connected with the upper tubular column limiting plate through an adjusting mechanism; the adjusting mechanism comprises a handle, a reverse rotation locking block and a limiting locking screw penetrating and connecting the handle and the reverse rotation locking block. And two opposite reverse rotation locking blocks are arranged between the handle and one wing plate of the lower U-shaped frame. And the structure is simple and compact, the operation is labor-saving, the anti-failure function is realized, the service life is longer, the performance is more optimized, and the mold production can be realized.

Description

Technical Field

[0001] This utility model relates to the field of steering gear technology, specifically to a locking mechanism for adjustable tilt and height of the steering gear of an engineering vehicle. Background Technology

[0002] The steering gear assembly is installed on various vehicles and is a crucial component for the driver to steer the vehicle. Currently, tilting steering gears on the market are typically operated manually using a locking mechanism, where the steering wheel is turned to change the steering angle. The locking mechanism usually involves rotating a threaded handle, with the threads pressing against a bushing to achieve friction and stop the movement. After a certain number of uses, the threads wear, increasing the handle's rotation angle and requiring greater force to press against the bushing. Over time, this can lead to the handle not locking properly, causing the steering gear assembly to loosen and creating a safety hazard. Utility Model Content

[0003] The purpose of this utility model is to address the defects and shortcomings of the existing technology by providing a locking mechanism for adjustable steering gear height and tilt in engineering vehicles. It has a simple and compact structure, is easy to operate, has a failure prevention function, a longer service life, and optimized performance, and can be produced by mold.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: it includes an upper tube column limiting plate, an upper U-shaped frame, a lower U-shaped frame, and an adjustment mechanism; the wing plate of the upper tube column limiting plate is fixed to the tube wall of the upper tube column; the waist plate of the upper U-shaped frame is fixed to the lower end of the upper tube column; the waist plate of the lower U-shaped frame is fixed to the upper end of the lower tube column; the wing plates of the upper U-shaped frame and the lower ends of the wing plates of the lower U-shaped frame are rotatably connected by a rotating shaft, and an anti-loosening nut is connected to the rotating shaft; one of the wing plates of the lower U-shaped frame is connected to the upper tube column limiting plate by the adjustment mechanism; the adjustment mechanism includes a handle, a reverse rotation locking block, and a limiting locking screw that passes through and connects the two; two oppositely arranged reverse rotation locking blocks are provided between the handle and one of the wing plates of the lower U-shaped frame.

[0005] Furthermore, the reverse rotation locking block has a strip-shaped mounting block integrally formed on its back side, several smooth inclined protrusions integrally formed at equal angles on its front side, and several rotation limiting edges integrally formed at equal angles on its outer ring.

[0006] Furthermore, the upper end of the handle is provided with a handle groove that mates with the strip-shaped mounting block.

[0007] Furthermore, one of the wing plates of the lower U-shaped frame is provided with a transverse adjustment groove that cooperates with the strip mounting block for installation.

[0008] Furthermore, a longitudinal adjustment groove is provided on the waist plate of the upper column limiting plate.

[0009] Furthermore, the limiting locking screw is provided through the handle strip groove, the reverse rotation locking block shaft hole, the transverse adjustment groove and the longitudinal adjustment groove, and an anti-loosening nut is installed on one end located on the outside of the handle.

[0010] Furthermore, a flat needle roller bearing is clamped between the second anti-loosening nut and the handle.

[0011] Furthermore, anti-loosening washers are clamped between both ends of the planar needle roller bearing and the anti-loosening nut and the handle.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a locking mechanism for the adjustable tilt and height of the steering gear of an engineering vehicle. By utilizing the cooperation of the smooth inclined protrusions on two identical counter-rotating locking blocks, the pitch is changed by rotating at a fixed angle, increasing the friction between the upper column limiting plate and the lower U-shaped frame, thus making it less prone to loosening. The setting of the rotating limiting edge can control the rotation angle of the rotating handle, and the rotating contact surface is very smooth, reducing the friction during rotation. The handle can be locked with very light hand force, resulting in a longer service life, optimized performance, and the ability to achieve molded production, improving consistency and making the quality more reliable. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is the front view of this utility model.

[0015] Figure 3 yes Figure 2 The left view.

[0016] Figure 4 This is a structural schematic diagram of the lower U-shaped frame in this utility model.

[0017] Figure 5 This is a schematic diagram of the upper tube column limiting plate in this utility model.

[0018] Figure 6 This is a schematic diagram of the handle structure in this utility model.

[0019] Figure 7 This is a schematic diagram of the front structure of the reverse rotation locking block in this utility model.

[0020] Figure 8 This is a schematic diagram of the back structure of the reverse rotation locking block in this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Upper tube column limiting plate, 1-1. Longitudinal adjustment groove, 2. Reverse rotation locking block, 2-1. Smooth inclined boss surface, 2-2. Rotation limiting edge, 2-3. Strip mounting block, 3. Flat needle roller bearing, 4. Anti-loosening washer, 5. Anti-loosening nut II, 6. Limiting locking screw, 7. Handle, 7-1. Handle strip groove, 8. Upper U-shaped frame, 9. Lower U-shaped frame, 9-1. Lateral adjustment groove, 10. Upper tube column, 11. Lower tube column, 12. Rotating shaft, 13. Anti-loosening nut I. Detailed Implementation

[0023] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. The preferred embodiments described are only examples. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] like Figures 1-8 As shown, this specific embodiment adopts the following technical solution: It includes an upper tube column limiting plate 1, an upper U-shaped frame 8, a lower U-shaped frame 9, and an adjustment mechanism; a longitudinal adjustment groove 1-1 is provided on the waist plate of the upper tube column limiting plate 1; the wing plate of the upper tube column limiting plate 1 is fixed to the tube wall of the upper tube column 10; the waist plate of the upper U-shaped frame 8 is fixed to the lower end of the upper tube column 10; the waist plate of the lower U-shaped frame 9 is fixed to the upper end of the lower tube column 11; the lower ends of the wing plates of the upper U-shaped frame 8 and the lower wing plates of the lower U-shaped frame 9 are rotatably connected by a rotating shaft 12, and an anti-loosening nut 13 is connected to the rotating shaft 12; one of the wing plates of the lower U-shaped frame 9 is connected to the upper tube column limiting plate 1 by an adjustment mechanism; the adjustment mechanism includes a handle 7, a reverse rotation locking block 2, and a through-type locking mechanism. A limiting locking screw 6 connects the two parts; two opposing reverse rotation locking blocks 2 are provided between the handle 7 and the left wing plate of the lower U-shaped frame 9. The reverse rotation locking blocks 2 are made of aluminum alloy; a strip-shaped mounting block 2-3 is integrally formed on the back of the reverse rotation locking block 2, and four smooth inclined protrusions 2-1 are integrally formed at equal angles on the front, with an 8mm shaft hole passing through the center; the smooth inclined protrusions 2-1 of the two reverse rotation locking blocks 2 fit together; the reverse rotation locking blocks 2 are treated with nitriding and other methods to increase strength and hardness and ensure service life; two rotation limiting edges 2-2 are integrally formed at equal angles on the outer ring of the front; the angle can be fixed by very light force to achieve the locking function;

[0025] The upper end of the handle 7 is provided with a handle groove 7-1 that is fitted with the strip mounting block 2-3. The strip mounting block 2-3 on the back of the reverse rotation locking block 2 on the left side is inserted into the handle groove 7-1.

[0026] The left wing plate of the lower U-shaped frame 9 is provided with a transverse adjustment groove 9-1 that cooperates with the strip mounting block 2-3 for installation; the strip mounting block 2-3 on the back of the right side of the reverse rotation locking block 2 is inserted into the transverse strip groove 9-1; the limiting locking screw 6 is provided through the handle strip groove 7-1, the shaft hole of the reverse rotation locking block 2, the transverse adjustment groove 9-1 and the longitudinal adjustment groove 1-1;

[0027] A second anti-loosening nut 5 is installed on one end of the limit locking screw 6 located outside the handle 7; a flat needle roller bearing 3 is sandwiched between the second anti-loosening nut 5 and the handle 7; anti-loosening washers 4 are sandwiched between both ends of the flat needle roller bearing 3 and the second anti-loosening nut 5 and the handle 7.

[0028] When using this invention, rotating the handle 7 counterclockwise by 35° causes the left-side reverse rotation locking block 2 to rotate, thereby changing the smooth inclined protrusions 2-1 on the two reverse rotation locking blocks 2 from a misaligned state to a relatively fitted state. At this time, the distance between the two reverse rotation locking blocks 2 increases, and the right-side reverse rotation locking block 2 presses against the lower U-shaped frame 9, increasing the friction between the column limiting plate 1 and the lower U-shaped frame 9, thus achieving the function of position locking. Rotating the handle 7 clockwise causes the left-side reverse rotation locking block 2 to rotate in the opposite direction, thereby changing the smooth inclined protrusions 2-1 on the two reverse rotation locking blocks 2 from a relatively fitted state to a misaligned state. At this time, the distance between the two reverse rotation locking blocks 2 decreases, reducing the friction between the column limiting plate 1 and the lower U-shaped frame 9, i.e., it is in a loosened state, at which time the tilt angle can be adjusted.

[0029] Compared with the prior art, the beneficial effects of this utility model are:

[0030] Existing threaded handles do not have a fixed rotation angle. Without knowing how much rotation is needed to achieve tightening, the driver relies entirely on their feel. Since each driver has different hand strength, the tightening friction will vary. Therefore, a very large amount of hand force must be used to rotate the handle to obtain the desired tightening friction. This utility model utilizes the aluminum alloy properties of two identical counter-rotating locking blocks with identical smooth inclined protrusions on both sides. By rotating at a fixed angle to change the distance, the friction between the upper column limiting plate and the lower U-shaped frame is increased, making it less prone to loosening.

[0031] The smooth, sloping protrusions and rotating limiting edges distributed at equal angles not only ensure a fixed angle for the rotating handle but also provide a very smooth rotating contact surface, reducing friction during rotation. The handle can be locked with very light hand force, resulting in a longer service life, optimized performance, and the ability to achieve molded production, improved consistency, and more reliable quality.

[0032] For those skilled in the art, modifications can be made to the technical solutions described in the foregoing embodiments, and equivalent substitutions can be made to some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A lock mechanism for lift recliner adjustment of a directional machine of a construction vehicle, characterized by: It includes an upper column limiting plate (1), an upper U-shaped frame (8), a lower U-shaped frame (9), and an adjustment mechanism; the wing plate of the upper column limiting plate (1) is fixed to the pipe wall of the upper column (10); the waist plate of the upper U-shaped frame (8) is fixed to the lower end of the upper column (10); the waist plate of the lower U-shaped frame (9) is fixed to the upper end of the lower column (11); the wing plate of the upper U-shaped frame (8) and the lower end of the wing plate of the lower U-shaped frame (9) are rotatably connected by a rotating shaft (12), and an anti-loosening nut (13) is connected on the rotating shaft (12); one of the wing plates of the lower U-shaped frame (9) is connected to the upper column limiting plate (1) by an adjustment mechanism; the adjustment mechanism includes a handle (7), a reverse rotation locking block (2), and a limiting locking screw (6) that passes through and connects the two; two oppositely arranged reverse rotation locking blocks (2) are provided between the handle (7) and one of the wing plates of the lower U-shaped frame (9).

2. The lock mechanism for lift recliner adjustment of a directional machine of an engineered vehicle of claim 1, wherein: The reverse rotation locking block (2) has a strip-shaped mounting block (2-3) integrally formed on the back, several smooth inclined protrusions (2-1) integrally formed at equal angles on the front, and several rotation limiting edges (2-2) integrally formed at equal angles on the outer ring of the front.

3. The lock mechanism for lift recliner adjustment of a directional machine of an engineered vehicle of claim 2, wherein: The upper end of the handle (7) is provided with a handle groove (7-1) that is fitted to the strip mounting block (2-3).

4. The lock mechanism for lift recliner adjustment of a directional machine of an engineered vehicle of claim 3, wherein: One of the wing plates of the lower U-shaped frame (9) is provided with a transverse adjustment groove (9-1) that is installed in conjunction with the strip mounting block (2-3).

5. The lock mechanism for lift recliner adjustment of a directional machine of an engineered vehicle of claim 4, wherein: The upper column limiting plate (1) has a longitudinal adjustment groove (1-1) on its waist plate.

6. The lock mechanism for lift recliner adjustment of a directional machine of an engineered vehicle of claim 5, wherein: The limiting locking screw (6) is set through the handle strip groove (7-1), the shaft hole of the reverse rotation locking block (2), the transverse adjustment groove (9-1) and the longitudinal adjustment groove (1-1), and an anti-loosening nut (5) is installed on one end located on the outside of the handle (7).

7. The lock mechanism for lift recliner adjustment of a directional machine of an engineered vehicle of claim 6, wherein: A flat needle roller bearing (3) is sandwiched between the anti-loosening nut 2 (5) and the handle (7).

8. The lock mechanism for lift recliner adjustment of a directional machine of an engineered vehicle of claim 7, wherein: Anti-loosening washers (4) are provided between both ends of the flat needle roller bearing (3), the anti-loosening nut (5), and the handle (7).

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