Tractor steering column assembly

Abstract

The utility model relates to the technical field of agricultural machinery, in particular to a tractor steering tubular column assembly which comprises an upper tubular column and a lower tubular column, a universal joint is connected between the upper tubular column and the lower tubular column, an upper tubular column shell is fixedly arranged on the outer wall of the upper tubular column, a lower tubular column shell is fixedly arranged on the outer wall of the lower tubular column, an upper adjusting support is welded to the lower end of the upper tubular column shell, a lower adjusting support is welded to the upper end of the lower tubular column shell, upper adjusting teeth are arranged on the upper adjusting support, lower adjusting teeth are movably arranged on one side of the lower adjusting support, and the upper adjusting teeth are meshed with the lower adjusting teeth. A driver can accurately control the adjusting angle of the steering wheel, each tooth represents first-level angle adjustment, the adjusting accuracy is ensured, a combination instrument and a switch installation support are welded to the outer wall of the upper tubular column shell, a pedal support is welded to the outer wall of the lower tubular column shell, and the assembly time is saved through the welding integrated design.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and in particular to a tractor steering column assembly. Background Technology

[0002] The steering column is an important component of the tractor steering system. Its main function is to convert the torque applied by the driver to the steering wheel into the rotation of the wheels through components such as the steering column, steering gear, steering knuckle, and drive shaft, thereby achieving vehicle steering.

[0003] Most steering columns on the market are currently designed as a single piece with no adjustable angle, making them unsuitable for drivers of different sizes and working conditions. Some column assemblies can achieve angle adjustment, but their structures are more complex. Therefore, this paper proposes a tractor steering column assembly. Utility Model Content

[0004] The main purpose of this utility model is to provide a tractor steering column assembly to solve the problems mentioned in the related technology that most steering columns on the market are of one-piece design with non-adjustable angle, which cannot adapt to drivers of different sizes and different working conditions. Some column assemblies can achieve angle adjustment, but their structures are relatively complex.

[0005] To achieve the above objectives, according to one aspect of the present invention, a tractor steering column assembly is provided, comprising an upper column and a lower column, wherein a universal joint is connected between the upper column and the lower column, an upper column housing is fixedly disposed on the outer wall of the upper column, a lower column housing is fixedly disposed on the outer wall of the lower column, an adjusting support is welded to the lower end of the upper column housing, and an adjusting support is welded to the upper end of the lower column housing;

[0006] A steering wheel adjustment part is provided between the lower and upper parts of the adjustment support. The steering wheel adjustment part includes an upper adjustment tooth on the upper part of the adjustment support and a lower adjustment tooth on the lower part of the adjustment support. The steering wheel adjustment part also includes an adjustment pedal connected to the lower adjustment tooth. Stepping on the adjustment pedal causes the lower adjustment tooth to move down until the lower adjustment tooth and the upper adjustment tooth are no longer engaged. Rotating the upper column causes the steering wheel to adjust the angle.

[0007] Furthermore, locking bolts are threaded through the upper and lower tubular housings, the lower end of the adjusting support is slidably disposed on the adjusting support, and a limit pin is installed in the lower part of the adjusting support.

[0008] Furthermore, two sliding grooves are symmetrically opened on both sides of the lower adjusting tooth, and two shoulder bolts are symmetrically installed on both sides of the upper column housing, with the shoulder bolts slidably installed in the sliding grooves.

[0009] Furthermore, an adjustment pedal is installed at the bottom end of the lower adjustment tooth, and a pin is provided on the adjustment pedal, with one end of the pin connected to the lower adjustment tooth.

[0010] Furthermore, two return springs are sleeved on the lower adjusting tooth, the return springs are located below the shoulder bolt, and an assist spring is fixedly connected to the upper adjusting tooth.

[0011] Furthermore, a mounting base is welded to the bottom of the pedal bracket, and the mounting base is welded to the bottom of the lower tube column housing.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] In this tractor steering column assembly, adjusting teeth are welded inside the adjusting support. The upper and lower adjusting teeth mesh with each other. By meshing and disengaging the upper and lower adjusting teeth, the driver can precisely control the adjustment angle of the steering wheel. Each tooth represents a level of angle adjustment, ensuring the accuracy of the adjustment. The power assist spring makes the steering wheel return to its original position automatically, which is convenient for the driver to get in and out of the vehicle and perform other operations. Attached Figure Description

[0014] Figure 1 This is a front view of the tractor steering column assembly in a preferred embodiment of the present invention;

[0015] Figure 2 This is a left view of the tractor steering column assembly in a preferred embodiment of the present invention;

[0016] Figure 3 This is a rear view of the tractor steering column assembly in a preferred embodiment of the present invention;

[0017] Figure 4 This is a cross-sectional view of the tractor steering column assembly in a preferred embodiment of the present invention;

[0018] Figure 5 This is an isometric view of the tractor steering column assembly in a preferred embodiment of the present invention.

[0019] Illustration:

[0020] 1. Upper tube column; 2. Lower tube column; 3. Universal joint; 4. Upper tube column housing; 5. Lower tube column housing; 6. Upper adjusting support; 7. Lower adjusting support; 8. Upper adjusting gear; 9. Lower adjusting gear; 10. Locking bolt; 11. Shoulder bolt; 12. Return spring; 13. Limit pin; 14. Adjusting pedal; 15. Assist spring; 16. Pin; 17. Pedal bracket; 18. Mounting base. Detailed Implementation

[0021] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0022] Please see Figures 1-5 As shown, the purpose of this embodiment is to provide a tractor steering column assembly, including an upper column 1 and a lower column 2, with a universal joint 3 connecting the upper column 1 and the lower column 2. An upper column housing 4 is fixedly installed on the outer wall of the upper column 1, and a lower column housing 5 is fixedly installed on the outer wall of the lower column 2. An upper adjusting support 6 is welded to the lower end of the upper column housing 4, and a lower adjusting support 7 is welded to the upper end of the lower column housing 5.

[0023] It should be noted that the top of the upper column 1 is connected to the steering wheel.

[0024] A steering wheel adjustment part is provided between the lower adjustment support 7 and the upper adjustment support 6. The steering wheel adjustment part includes an upper adjustment tooth 8 provided on the upper adjustment support 6 and a lower adjustment tooth 9 provided on the lower adjustment support 7. The steering wheel adjustment part also includes an adjustment pedal 14 connected to the lower adjustment tooth 9. Stepping on the adjustment pedal 14 causes the lower adjustment tooth 9 to move down until the lower adjustment tooth 9 and the upper adjustment tooth 8 are no longer engaged. Rotating the upper column 1 drives the steering wheel to adjust the angle.

[0025] The upper adjustment support 6 and the upper adjustment tooth 8 are fixed, and the lower adjustment tooth 9 is movably provided on one side of the lower adjustment support 7. The teeth of the upper adjustment tooth 8 and the lower adjustment tooth 9 mesh with each other. The outer wall of the lower column housing 5 is welded with a pedal bracket 17.

[0026] The upper column housing 4 and the lower column housing 5 are used to protect and fix the upper column 1 and the lower column 2, effectively preventing external impurities (such as dust, moisture, etc.) from corroding the inside of the column and extending its service life. At the same time, the housing also plays a role in shock absorption, which can reduce the damage to the column and its internal structure by collision to a certain extent. Locking bolts 10 are threaded through the upper column housing 4 and the lower column housing 5, and the upper column housing 4 and the lower column housing 5 are assembled into a whole by the locking bolts 10, forming a stable integral structure. The upper column housing 4 and the lower column housing 5 rotate relative to each other on the locking bolts 10 as the axis. When the driver operates the steering wheel, the upper column housing 4 will rotate relative to the lower column housing 5 on the locking bolts 10 as the axis, thereby realizing the steering function. In the assembly process, the upper column 1 and the lower column 2 need to be installed into the corresponding housings respectively. Then, the locking bolts 10 are passed through the reserved holes of the upper column housing 4 and the lower column housing 5 and tightened to the predetermined torque value using appropriate tools.

[0027] One end of the lower adjusting support 7 is slidably disposed within the upper adjusting support 6. Both the upper adjusting support 6 and the lower adjusting support 7 are U-shaped, and the U-shaped openings of the upper adjusting support 6 and the lower adjusting support 7 are arranged opposite to each other. A limit pin 13 is installed inside the lower adjusting support 7 to limit the adjustment angle of the upper column 1 and prevent structural damage or functional failure caused by excessive adjustment.

[0028] It should be noted that the bottom end of the adjusting support 6 is provided with a limiting groove that cooperates with the limiting pin 13. The limiting pin 13 is located in the limiting groove. The length of the limiting groove is specific, and the limiting pin 13 can only move within the length range of the limiting groove. The limiting groove plays a limiting role for the limiting pin 13. Therefore, the adjusting support 6 plays a limiting role for the adjusting support 7, thereby limiting the adjustment angle of the upper tube column 1.

[0029] Two sliding grooves are symmetrically opened on both sides of the lower adjusting tooth 9, and two shoulder bolts 11 are symmetrically installed on both sides of the upper column housing 4. The shoulder bolts 11 are slidably installed in the sliding grooves. One end of the shoulder bolt 11 matches the shape of the sliding groove and can be tightly embedded in the sliding groove, providing stable support and guidance for the sliding of the lower adjusting tooth 9. The shape of the sliding groove restricts the movement of the lower adjusting tooth 9 in the horizontal direction, so the lower adjusting tooth 9 can only slide in the vertical direction.

[0030] An adjustment pedal 14 is installed at the bottom of the lower adjustment gear 9. A pin 16 is provided on the adjustment pedal 14. One end of the pin 16 is connected to the lower adjustment gear 9. A reserved hole is provided on the lower adjustment gear 9. One end of the pin 16 is tightly fitted with the reserved hole. Therefore, the adjustment pedal 14 is assembled with the lower adjustment gear 9 through the pin 16. When the driver presses the adjustment pedal 14, the lower adjustment gear 9 slides downward. When the driver presses the adjustment pedal 14, the pedal drives the lower adjustment gear 9 to slide downward through the pin 16. The sliding mechanism is based on the cooperation between the sliding grooves on both sides of the lower adjustment gear 9 and the shoulder bolts 11 on the lower column housing 5. During the sliding process, the teeth between the lower adjustment gear 9 and the upper adjustment gear 8 gradually separate from the meshing state. Then, the upper column 1 is rotated so that it rotates around the locking bolt 10, thereby realizing the angle adjustment of the steering wheel.

[0031] It should be noted that the end of the adjusting pedal 14 is rotatably mounted on the pedal bracket 17 to provide a fulcrum for the adjusting pedal 14. The pedal bracket 17 is provided with an arc-shaped track groove, and the pin 16 moves along the arc-shaped track groove. When the adjusting pedal 14 is stepped on, the adjusting pedal 14 rotates around the fulcrum at its end, and the pin 16 on it moves down along the arc-shaped track groove, which can drive the lower adjusting tooth 9 to move down.

[0032] Furthermore, since the trajectory of the adjustment pedal 14 driving the pin 16 to rotate is a short-distance arc, the pin 16 will produce a small horizontal displacement during the movement. Therefore, the end of the lower adjustment tooth 9 will also produce a small horizontal displacement. So the diameter of the shoulder bolt 11 is smaller than the width of the sliding groove. In this way, while the end of the lower adjustment tooth 9 produces a small horizontal displacement, the shoulder bolt 11 can also produce a small horizontal displacement in the sliding groove, without hindering the normal movement of the lower adjustment tooth 9.

[0033] Furthermore, the upper adjustment tooth 8 and the lower adjustment tooth 9 mesh through a set of teeth, each tooth representing a level of angle adjustment. Therefore, the driver can precisely adjust the steering wheel angle by controlling the number of teeth rotated, which not only provides a high degree of adjustment flexibility but also ensures the accuracy and stability of the adjustment. The driver can find the most suitable position by simply pressing the adjustment pedal 14 and turning the steering wheel according to their own driving habits and comfort needs.

[0034] Two return springs 12 are fitted on the lower adjusting tooth 9. The return springs 12 are located below the shoulder bolt 11. Their main function is to provide sufficient elastic force to reset the lower adjusting tooth 9 when the driver releases the adjusting pedal 14, thereby also driving the adjusting pedal 14 to reset. During the reset process, the elastic force of the return spring 12 pushes the lower adjusting tooth 9 to slide upward along the sliding groove until its teeth re-mesh with the teeth of the upper adjusting tooth 8, thereby locking the angle of the steering wheel and ensuring the stability of the steering system.

[0035] A power assist spring 15 is fixedly connected to the upper adjusting gear 8. The other end of the power assist spring 15 is fixed to the front bracket. When the driver releases the adjusting pedal 14, the elastic force of the power assist spring 15 acts on the upper adjusting gear 8, causing the upper column 1 to rotate around the locking bolt 10, so that the steering wheel automatically returns to the initial position, which greatly facilitates the driver to get in and out of the vehicle and to perform other operations.

[0036] A mounting base 18 is welded to the bottom of the pedal bracket 17, and the mounting base 18 is welded to the bottom of the lower column housing 5. This integrated welding design ensures a secure connection between the pedal bracket 17, the mounting base 18, and the lower column housing 5. During installation, the mounting base 18 is assembled with the front of the instrument panel.

[0037] In practical use, when the steering wheel angle needs to be adjusted, the driver presses the adjustment pedal 14. The lower adjustment tooth 9 slides downward along the shoulder bolt 11 via the pin, causing the teeth between the upper adjustment tooth 8 and the lower adjustment tooth 9 to gradually separate. The driver can then turn the steering wheel, causing the upper column 1 to rotate around the locking bolt 10, thereby adjusting the steering wheel angle. The adjustment level can be precisely controlled according to the meshing of the teeth. When the steering wheel is adjusted to the desired angle, the driver releases the adjustment pedal 14. Under the action of the return spring 12, the lower adjustment tooth 9 slides upward along the sliding groove until its teeth re-mesh with the teeth of the upper adjustment tooth 8, locking the steering wheel angle. After the driver releases the adjustment pedal 14, the elastic force of the assist spring 15 acts on the upper adjustment tooth 8, causing the upper column 1 to rotate around the locking bolt 10, so that the steering wheel automatically returns to its initial position.

[0038] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A tractor steering column assembly, comprising an upper column (1) and a lower column (2), wherein a universal joint (3) is connected between the upper column (1) and the lower column (2), characterized in that, The upper tube column (1) is fixedly provided with an upper tube column shell (4), and the lower tube column (2) is fixedly provided with a lower tube column shell (5). An upper adjustment support (6) is welded to the lower end of the upper tube column shell (4), and an upper adjustment support (7) is welded to the upper end of the lower tube column shell (5). A steering wheel adjustment part is provided between the lower (7) and upper (6) of the adjustment support. The steering wheel adjustment part includes an upper adjustment tooth (8) provided on the upper (6) of the adjustment support and a lower adjustment tooth (9) provided on the lower (7) of the adjustment support. The steering wheel adjustment part also includes an adjustment pedal (14) connected to the lower adjustment tooth (9). Stepping on the adjustment pedal (14) causes the lower adjustment tooth (9) to move down until the lower adjustment tooth (9) and the upper adjustment tooth (8) are no longer engaged. Rotating the upper column (1) causes the steering wheel to be adjusted in angle.

2. The tractor steering column assembly according to claim 1, characterized in that, Locking bolts (10) are threaded through the upper tube shell (4) and the lower tube shell (5). One end of the lower adjustment support (7) is slidably disposed in the upper adjustment support (6), and a limit pin (13) is installed in the lower adjustment support (7).

3. The tractor steering column assembly according to claim 1, characterized in that, The lower adjusting tooth (9) has two symmetrical sliding grooves on both sides, and the upper column housing (4) has two symmetrical shoulder bolts (11) installed on both sides. The shoulder bolts (11) are slidably installed in the sliding grooves.

4. The tractor steering column assembly according to claim 1, characterized in that, The adjusting pedal (14) is located at the bottom end of the lower adjusting tooth (9), and a pin is provided on the adjusting pedal (14), with one end of the pin connected to the lower adjusting tooth (9).

5. The tractor steering column assembly according to claim 1, characterized in that, Two return springs (12) are sleeved on the lower adjusting tooth (9). The return springs (12) are located below the shoulder bolt (11). An assist spring (15) is fixedly connected to the upper adjusting tooth (8).

6. The tractor steering column assembly according to claim 1, characterized in that, The lower tube column housing (5) is welded to the outer wall of a pedal bracket (17), and a mounting seat (18) is welded to the bottom of the pedal bracket (17), and the mounting seat (18) is welded to the bottom of the lower tube column housing (5).

Images