Locking mechanism of automobile steering column

Abstract

The utility model provides a locking mechanism of an automobile steering column, which relates to the technical field of automobile steering columns and comprises a steering column body, a limit gear and a limit rack, a fixing base is mounted on the outer side of a column body of the steering column body through bolts, fixing plates are welded at the upper end of the fixing base and are positioned on two sides of the steering column body, and the limit gear and the limit rack are fixed on the fixing plate. A rotating shaft is rotatably mounted on the inner side of the fixing plate, through arrangement of a limiting gear and a limiting rack, under mutual cooperation of the limiting rack and a spring, a rotation limiting effect can be achieved on the limiting gear, the situation that the limiting gear rotates too fast can be avoided, and the device is suitable for long-time use; the position of the connecting plate can be adjusted according to actual requirements so as to ensure the meshing tightness state between the limiting rack and the limiting gear, the flexible connecting plate structure allows the meshing state to be adjusted according to different conditions, and therefore the performance of the locking mechanism is adjusted so as to meet specific requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile steering columns, in particular to a locking mechanism of an automobile steering column. Background Art

[0002] The automobile steering column is an important component connecting the steering wheel and the vehicle steering system. It transmits the driver's operation of the steering wheel to the vehicle's steering mechanism, thereby controlling the steering direction of the vehicle. The locking mechanism of the automobile steering column is usually designed to ensure that the steering column (also called the steering wheel column or steering column) does not move or rotate accidentally during the driving of the vehicle. This locking mechanism is designed to improve driving safety and ensure that the vehicle remains stable during driving.

[0003] After searching, the utility model with the patent number "CN219989319U" provides "a locking mechanism for a car steering column. The locking mechanism of the car steering column is composed of a connecting shaft, a cam unit and a handle. A cam unit is provided at one end of the connecting shaft, and a handle is provided on the connecting shaft outside the cam unit; it is characterized in that a damper is installed at the other end of the connecting shaft through an adjusting nut. The locking mechanism of the car steering column uses a damper to counteract the rotational force generated by the cam unit on the handle, thereby effectively reducing the rotation speed of the handle when the handle is turned, preventing the handle from hitting the hand and avoiding safety hazards; the damper can be adjusted up and down through the limiting slide groove, and then the steering column can be adjusted in angle without affecting the adjustment function of the car steering column; it solves the problem that the existing car steering column is easy to hit the hand, resulting in safety risks." However, under long-term and frequent use, the structure of friction block A and friction block B used in the damper will inevitably gradually decrease due to friction. As time goes by, the decrease in friction may cause the damper structure to no longer effectively play the role of damping friction, and ultimately cause the damper to fail.

[0004] Therefore, we provide a locking mechanism for an automobile steering column. Utility Model Content

[0005] The purpose of the utility model is to provide a locking mechanism for a steering column of an automobile, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a locking mechanism for a steering column of an automobile, comprising a steering column body, a limit gear and a limit rack, wherein a fixed base is bolted to the outer side of the column body of the steering column body, a fixing plate is welded to the upper end of the fixed base and to both sides of the steering column body, a rotating shaft is rotatably installed on the inner side of the fixing plate, a handle is bolted to one end of the rotating shaft, and a limit gear is fixedly installed on the other end of the rotating shaft, both sides of the limit gear are meshed with limit racks, and the limit rack is slidably installed inside the sliding seat.

[0007] Preferably, a sliding block is welded to one side of the limiting rack, and a guide block is welded to the other side of the sliding block.

[0008] Preferably, a connecting plate is welded to one side of the sliding seat, and the connecting plate is bolted to both sides of the fixing plate.

[0009] Preferably, a sliding groove is penetrated on one side of the interior of the sliding seat, and the sliding block is slidably installed inside the sliding groove, and a guide groove is penetrated on the other side of the interior of the sliding seat, and the guide block is slidably installed inside the guide groove, and the sliding groove is connected with the guide groove.

[0010] Preferably, top plates are screwed onto the upper and lower ends of the sliding seat, and an elastic limiting rod is fixedly installed between the top plate and the limiting rack.

[0011] Preferably, the elastic limiting rod is composed of two groups of sleeves and a sliding rod, the two groups of sleeves are respectively abutted against one side of the sliding block and the inner side of the top plate, and the sliding rod is slidably installed inside the sleeve.

[0012] Preferably, a spring is sleeved on the outer side of the elastic limiting rod, and one end of the spring is fixedly mounted on one side of the sliding block, and the other end of the spring abuts against the inner side of the top plate.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The locking mechanism of the steering column of the automobile is provided with a limit gear and a limit rack. When the rotating shaft is rotated by the handle, the rotating shaft drives the limit gear to rotate. When the limit gear rotates, the limit racks on both sides will be driven to change in opposite displacements. The limit rack and the spring cooperate with each other to limit the rotation of the limit gear, thereby preventing the limit gear from rotating too fast, and is suitable for long-term use.

[0015] 2. Through the setting of the connecting plate, the position of the connecting plate can be adjusted according to actual needs to ensure the tightness of the meshing between the limit rack and the limit gear. When the distance between the limit rack and the limit gear is small, the meshing force is stronger, which will slow down the rotation speed of the limit gear. When the distance between the limit rack and the limit gear is large, the meshing force is weaker, which will speed up the rotation speed of the limit gear. This flexible connecting plate structure allows the meshing state to be adjusted according to different situations, thereby adjusting the performance of the locking mechanism to meet specific requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall appearance of the locking mechanism of the automobile steering column of the utility model;

[0017] Figure 2 It is a side structural schematic diagram of the locking mechanism of the automobile steering column of the utility model;

[0018] Figure 3 It is a schematic diagram of the structure of the matching between the limit rack and the sliding seat of the utility model;

[0019] Figure 4 It is a schematic cross-sectional structure diagram of the limit rack and the sliding seat of the utility model.

[0020] Numbers in the figure: 1, steering column body; 2, fixed base; 3, fixed plate; 4, rotating shaft; 5, handle; 6, limit gear; 7, limit rack; 71, sliding block; 72, guide block; 8, sliding seat; 81, connecting plate; 82, slide groove; 83, guide groove; 84, top plate; 85, elastic limit rod; 851, sleeve; 852, slide rod; 86, spring. DETAILED DESCRIPTION

[0021] 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.

[0022] See also Figure 1-4As shown, the utility model provides an embodiment: a locking mechanism for a steering column of an automobile, comprising a steering column body 1, a limit gear 6 and a limit rack 7, a fixed base 2 is bolted to the outer side of the column body of the steering column body 1, a fixed plate 3 is welded to the upper end of the fixed base 2 and on both sides of the steering column body 1, a rotating shaft 4 is rotatably installed on the inner side of the fixed plate 3, a handle 5 is bolted to one end of the rotating shaft 4, and a limit gear 6 is fixedly installed on the other end of the rotating shaft 4, both sides of the limit gear 6 are meshed with the limit rack 7, and the limit rack 7 is slidably installed inside the sliding seat 8.

[0023] Furthermore, a sliding block 71 is welded on one side of the limiting rack 7, and the limiting rack 7 drives the sliding block 71 to slide inside the slide groove 82. A guide block 72 is welded on the other side of the sliding block 71. When the sliding block 71 slides, the guide block 72 can serve the purpose of guiding.

[0024] Furthermore, a connecting plate 81 is welded to one side of the sliding seat 8, and the connecting plate 81 is bolted to both sides of the fixed plate 3. The bolt fixing method can adjust the position of the connecting plate 81 according to actual needs to ensure the meshing tightness between the limit rack 7 and the limit gear 6.

[0025] Furthermore, a sliding groove 82 is penetrated on one side of the interior of the sliding seat 8, and the sliding block 71 is slidably installed in the interior of the sliding groove 82, and a guide groove 83 is penetrated on the other side of the interior of the sliding seat 8, and the guide block 72 is slidably installed in the interior of the guide groove 83, and the sliding groove 82 is connected with the guide groove 83. When the sliding block 71 slides in the sliding groove 82, the guide block 72 on one side thereof slides in the guide groove 83, and the guide groove 83 provides a position limit for the guide block 72 to prevent it from running off.

[0026] Furthermore, a top plate 84 is screwed onto both upper and lower ends of the sliding seat 8, and an elastic limiting rod 85 is fixedly installed between the top plate 84 and the limiting rack 7. The top plate 84 is screwed, and when the limiting rack 7 needs to be replaced, the top plate 84 can be removed, and then the limiting rack 7 can be taken out for replacement.

[0027] Furthermore, the elastic limiting rod 85 is composed of two groups of sleeves 851 and a sliding rod 852. The two groups of sleeves 851 are respectively abutted against one side of the sliding block 71 and the inner side of the top plate 84. The sliding rod 852 is slidably installed inside the sleeve 851. When the limiting rack 7 slides and changes inside the sliding seat 8, it will drive the sliding rod 852 to slide inside the sleeve 851.

[0028] Furthermore, a spring 86 is sleeved on the outer side of the elastic limiting rod 85, and one end of the spring 86 is fixedly mounted on one side of the sliding block 71, and the other end of the spring 86 abuts against the inner side of the top plate 84. The two groups of springs 86 clamp the limiting rack 7 inside the sliding seat 8. Once the limiting rack 7 loses the restriction of the limiting gear 6, the spring 86 will exert its elastic force to squeeze the limiting rack 7 back to its original position.

[0029] Working principle: First, a locking mechanism of a car steering column is moved to a working position. In the first step, when the handle 5 is turned, the handle 5 drives the rotating shaft 4 to rotate, and the handle 5 drives the limit gear 6 to rotate synchronously. In the second step, the limit gear 6 is in a meshing state with the limit rack 7. When the limit gear 6 rotates, the limit rack 7 on one side will be subjected to the rotational force of the two sets of limit gears 6, thereby causing an upward displacement change, and the limit rack 7 on the other side will cause a downward displacement change. In the third step, when the limit gear 6 rotates, the limit rack 7 on one side will be subjected to the rotational force of the two sets of limit gears 6, thereby causing an upward displacement change, and the limit rack 7 on the other side will cause a downward displacement change. When the bar 7 slides inside the sliding seat 8, the spring 86 will be subjected to a short-term extrusion force, and the sliding rod 852 slides inside the sleeve 851. In the fourth step, when the tooth part of the limit gear 6 is out of meshing with the limit rack 7, the spring 86 exerts its elastic deformation to squeeze the limit rack 7 to reset, ensuring that the limit gear 6 can always be subjected to the elastic limiting force from the limit rack 7 when rotating, reducing the impact force of the handle 5 rebounding, thus completing the use process of a locking mechanism of a car steering column.

Claims

1. A locking mechanism for a steering column of an automobile, comprising a steering column body (1), a limit gear (6) and a limit rack (7), characterized in that: The outer side of the column body of the steering column body (1) is bolted with a fixed base (2), the upper end of the fixed base (2) and both sides of the steering column body (1) are welded with fixed plates (3), the inner side of the fixed plate (3) is rotatably mounted with a rotating shaft (4), one end of the rotating shaft (4) is bolted with a handle (5), and the other end of the rotating shaft (4) is fixedly mounted with a limit gear (6), both sides of the limit gear (6) are meshed with limit racks (7), and the limit rack (7) is slidably mounted inside a sliding seat (8).

2. The locking mechanism of a vehicle steering column according to claim 1, characterized in that: A sliding block (71) is welded to one side of the limiting rack (7), and a guiding block (72) is welded to the other side of the sliding block (71).

3. The locking mechanism of a vehicle steering column according to claim 1, characterized in that: A connecting plate (81) is welded to one side of the sliding seat (8), and the connecting plate (81) is bolted to both sides of the fixing plate (3).

4. The locking mechanism of a vehicle steering column according to claim 2, characterized in that: A slide groove (82) is provided through one side of the interior of the sliding seat (8), and the sliding block (71) is slidably mounted inside the slide groove (82); a guide groove (83) is provided through the other side of the interior of the sliding seat (8), and the guide block (72) is slidably mounted inside the guide groove (83), and the slide groove (82) and the guide groove (83) are connected.

5. The locking mechanism of a vehicle steering column according to claim 2, characterized in that: A top plate (84) is screwed onto the upper and lower ends of the sliding seat (8), and an elastic limiting rod (85) is fixedly installed between the top plate (84) and the limiting rack (7).

6. The locking mechanism of a vehicle steering column according to claim 5, characterized in that: The elastic limiting rod (85) is composed of two groups of sleeves (851) and a sliding rod (852). The two groups of sleeves (851) are respectively in contact with one side of the sliding block (71) and the inner side of the top plate (84). The sliding rod (852) is slidably installed inside the sleeve (851).

7. The locking mechanism of a vehicle steering column according to claim 5, characterized in that: A spring (86) is sleeved on the outer side of the elastic limiting rod (85), and one end of the spring (86) is fixedly mounted on one side of the sliding block (71), and the other end of the spring (86) abuts against the inner side of the top plate (84).

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