Structure for controlling holding force of four-direction adjusting steering column

Abstract

The utility model discloses a structure for controlling the retaining force of a four-way adjusting steering column, which comprises a steering outer pipe and a steering inner pipe which is arranged in the steering outer pipe and can move axially, one end of the steering outer pipe is provided with an axial split groove, two sides of the axial split groove form clamping side walls, and the clamping side walls are arranged on the steering inner pipe. An installation support tightly attached to the clamping side walls is installed on the outer side of the steering outer pipe, a supporting bolt transversely penetrating through the clamping side walls on the two sides is arranged on the installation support, a handle is arranged at one end of the supporting bolt in a sleeving mode, and a movable cam arranged on the supporting bolt in a sleeving mode is installed on the inner side of the handle. A fixed cam installed on the installation support is arranged on one axial side of the movable cam, the middle of the supporting bolt is sleeved with a supporting assembly, the two ends of the supporting assembly abut against the clamping side walls on the two sides respectively, and a locking nut is installed at the other end of the supporting bolt. The adjustable tubular column can solve the problem that an existing adjustable tubular column is insufficient in retaining force due to insufficient rigidity of a steering outer tube in a locking state.

Description

Technical Field

[0001] The utility model relates to the technical field of adjustable steering columns for automobiles, in particular to a structure for controlling the holding force of a four-direction adjustable steering column. Background Art

[0002] The manually adjustable steering column is the most commonly used steering system component in current vehicles. The column and steering wheel are typically adjusted in four directions via a handle. When the handle is locked, the mounting bracket of existing four-way adjustable columns increases the distance between the moving and fixed cams, causing deformation of the outer steering tube. This requires evaluating the holding force of the steering column. This holding force is the friction generated between the mounting bracket and the outer steering tube when a radial force is applied to the steering wheel. Since the outer steering tube is typically made of aluminum, if its stiffness is low, it will deform significantly, potentially leading to insufficient holding force. Utility Model Content

[0003] The utility model provides a structure for controlling the holding force of a four-way adjustable steering column, which can solve the problem that the holding force of the existing adjustable column is insufficient due to insufficient rigidity of the steering outer tube in a locked state.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a structure for controlling the holding force of a four-way adjustable steering column, comprising: a steering outer tube and an axially movable steering inner tube arranged inside the steering outer tube, one end of the steering outer tube being provided with an axial split groove, both sides of the axial split groove forming clamping side walls, a mounting bracket closely attached to the clamping side wall being installed on the outer side of the steering outer tube, a supporting bolt laterally passing through the clamping side walls on both sides being provided on the mounting bracket, one end of the supporting bolt being sleeved with a handle, a movable cam sleeved on the supporting bolt being installed on the inner side of the handle, A fixed cam mounted on a mounting bracket is provided on one axial side of the movable cam. As the handle rotates, the movable cam is axially squeezed by the fixed cam to deform the side walls of the mounting bracket inward. A support assembly is sleeved on the middle part of the support bolt. The two ends of the support assembly are respectively abutted against the clamping side walls on both sides. A locking nut is installed on the other end of the support bolt. When the friction force between the inner and outer steering tubes reaches the design value, the support assembly will support the outer steering tube so that it no longer deforms. The purpose is to increase the stiffness of the outer steering tube while ensuring the collapse force of the inner and outer steering tubes, thereby increasing the holding force of the column.

[0005] Preferably, the support assembly includes a first support nut and a second support nut which are sleeved on the support bolt. The first support nut and the second support nut are connected by a thread. The length of the support assembly can be adjusted by the threaded connection and relative rotation between the first support nut and the second support nut, thereby adjusting the supporting effect of the support assembly on the deformation of the steering outer tube.

[0006] Preferably, a first threaded connecting column is axially arranged at one end of the first support screw sleeve, and an outer wall of the first threaded connecting column is provided with an external thread. A second threaded connecting column is axially arranged at one end of the second support screw sleeve, and an inner wall of the second threaded connecting column is provided with an internal thread. The external thread is engaged with the internal thread, so that the connection and adjustment between the first support screw sleeve and the second support screw sleeve are more stable.

[0007] Preferably, the outer side walls of the first support screw sleeve and the second support screw sleeve are both polygonal structures, which facilitates the rotation of the first support screw sleeve and the second support screw sleeve.

[0008] Preferably, the upper part of the clamping side wall is provided with a straight groove along the axial direction of the steering outer tube, and the support bolt passes through the straight groove. The end size of the support assembly is larger than the width of the straight groove, which is conducive to the position adjustment between the support bolt and the steering outer tube. The support assembly can effectively support the clamping side wall.

[0009] Preferably, the outer side wall of the clamping side wall and the mounting bracket are in surface contact, so that the friction between the steering outer tube and the mounting bracket is more stable, thereby increasing the holding force.

[0010] Preferably, a plane bearing is sleeved on the support bolt between the locking nut and the mounting bracket, which can reduce the friction between the locking nut and the mounting bracket.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The space in the middle of the support bolt is effectively utilized to install the support assembly. When the friction between the inner and outer steering tubes reaches the design value, the support assembly will support the outer steering tube so that it no longer deforms. The purpose is to ensure the collapse force of the inner and outer steering tubes while increasing the stiffness of the outer steering tube and thus increasing the holding force of the column, solving the problem of insufficient holding force of the existing adjustable column in the locked state due to insufficient stiffness of the outer steering tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0014] Figure 2 This is a top view of the structure of the utility model;

[0015] Figure 3 for Figure 2 AA cross-sectional structural diagram;

[0016] Figure 4 for Figure 3 Enlarged structure diagram at point B.

[0017] Reference numerals:

[0018] 1. Steering outer tube, 11. Clamping side wall, 12. Axial split groove, 13. Slotted groove, 2. Mounting bracket, 3. Support assembly, 31. First support nut, 32. Second support nut, 33. Second threaded connecting column, 34. First threaded connecting column, 4. Support bolt, 5. Fixed cam, 6. Steering inner tube, 7. Moving cam, 8. Plane bearing, 9. Locking nut, 10. Handle. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0020] like Figure 1-4 As shown, the utility model is to solve the problem of insufficient holding force of the existing adjustable column in the locked state due to insufficient rigidity of the steering outer tube. The following technical solution is provided: a structure for controlling the holding force of the four-way adjustable steering column, comprising: a steering outer tube 1 and an axially movable steering inner tube 6 arranged inside the steering outer tube 1, one end of the steering outer tube 1 is provided with an axial split groove 12, and both sides of the axial split groove 12 form clamping side walls 11, and the outer side of the steering outer tube 1 is provided with a mounting bracket 2 that is tightly attached to the clamping side wall 11, characterized in that the mounting bracket 2 is provided with a support bolt 4 that passes through the clamping side walls 11 on both sides, one end of the support bolt 4 is sleeved with a handle 10, and the inner side of the handle 10 is provided with a dynamic cam 7 sleeved on the support bolt 4. A fixed cam 5 mounted on the mounting bracket 2 is provided on one axial side of the movable cam 7. As the handle 10 rotates, the movable cam 7 is axially squeezed by the fixed cam 5 to deform the side walls of the mounting bracket 2 inward. A support assembly 3 is sleeved on the middle part of the support bolt 4. The two ends of the support assembly 3 are respectively abutted against the clamping side walls 11 on both sides. A locking nut 9 is installed on the other end of the support bolt 4. When the friction between the inner and outer steering tubes reaches the design value, the support assembly will support the steering outer tube so that it no longer deforms. The purpose is to increase the stiffness of the steering outer tube while ensuring the collapse force of the inner and outer steering tubes, thereby increasing the column holding force.

[0021] Specifically, the opposing axial side walls of the movable cam 7 and the fixed cam 5 are each provided with protruding teeth and grooves. The rotation of the movable cam 7 causes the protruding teeth to interact, thereby changing the distance between the movable cam 7 and the fixed cam 5. This causes the mounting bracket 2 to be squeezed and deformed, thereby causing the steering outer tube 1 to deform. The presence of the support assembly 3 provides a certain degree of support to the steering outer tube 1, primarily supporting the clamping side wall 11. Once the steering outer tube 1 reaches a certain deformation, it no longer deforms, achieving a tight fit between the clamping side wall 11 and the mounting bracket. This increases the friction between the two, thereby achieving the purpose of increasing the holding force. The outer wall of the clamping side wall 11 is in surface contact with the mounting bracket 2, making the friction between the steering outer tube 1 and the mounting bracket 2 more stable and increasing the holding force.

[0022] As for the specific structures of the steering outer tube 1, the mounting bracket 2 and the steering inner tube 6, they all belong to the existing technology. The technical solution in this embodiment is an improvement based on the existing technology and will not be described in detail here.

[0023] In this embodiment, as an embodiment of the support component 3, as Figure 3-4 As shown, the support assembly 3 includes a first support nut 31 and a second support nut 32 that are sleeved on the support bolt 4. The first support nut 31 and the second support nut 32 are connected by threads. The length of the support assembly 3 can be adjusted by the threaded connection and relative rotation between the first support nut 31 and the second support nut 32, thereby adjusting the support effect of the support assembly 3 on the deformation of the steering outer tube 1. Among them, one end of the first support nut 31 is axially provided with a first threaded connection column 34, and the outer side wall of the first threaded connection column 34 is provided with an external thread. One end of the second support nut 32 is axially provided with a second threaded connection column 33, and the inner side wall of the second threaded connection column 33 is provided with an internal thread. The external thread and the internal thread are engaged with each other, making the connection and adjustment between the first support nut 31 and the second support nut 32 more stable.

[0024] like Figure 1 As shown, the outer walls of the first support screw sleeve 31 and the second support screw sleeve 32 are both polygonal structures, which facilitates the rotation of the first support screw sleeve 31 and the second support screw sleeve 32. For example, if the outer walls of the first support screw sleeve 31 and the second support screw sleeve 32 are both hexagonal structures, they can be rotated with a conventional wrench.

[0025] like Figure 1 As shown, the upper part of the clamping side wall 11 is provided with a straight groove 13 along the axial direction of the steering outer tube 1, and the support bolt 4 passes through the straight groove 13. The end size of the support component 3 is larger than the width of the straight groove 13, which is conducive to the position adjustment between the support bolt 4 and the steering outer tube 1. The support component 3 can effectively support the clamping side wall 11.

[0026] like Figure 3 As shown, a plane bearing 8 is sleeved on the support bolt 4 between the locking nut 9 and the mounting bracket 2, which can reduce the friction between the locking nut 9 and the mounting bracket 2.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, the terms "first," "second," and so on, used in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0029] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0030] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

Claims

1. A structure for controlling the holding force of a four-way adjustable steering column, comprising: A steering outer tube (1) and an axially movable steering inner tube (6) arranged inside the steering outer tube (1), one end of the steering outer tube (1) is provided with an axial splitting groove (12), both sides of the axial splitting groove (12) form clamping side walls (11), and the outer side of the steering outer tube (1) is provided with a mounting bracket (2) that is tightly attached to the clamping side walls (11), characterized in that the mounting bracket (2) is provided with a support bolt (4) that passes through the clamping side walls (11) on both sides horizontally, one end of the support bolt (4) is provided with a handle (10), and the handle ( A movable cam (7) sleeved on the support bolt (4) is installed on the inner side of the movable cam (7), and a fixed cam (5) mounted on the mounting bracket (2) is provided on the axial side of the movable cam (7). As the handle (10) rotates, the movable cam (7) and the fixed cam (5) are axially squeezed to deform the side walls of the mounting bracket (2) inward. A support assembly (3) is sleeved on the middle part of the support bolt (4), and the two ends of the support assembly (3) are respectively abutted against the clamping side walls (11) on both sides. A locking nut (9) is installed on the other end of the support bolt (4).

2. The structure for controlling the four-way adjustable steering column holding force according to claim 1, characterized in that: The support assembly (3) comprises a first support nut (31) and a second support nut (32) which are sleeved on the support bolt (4); the first support nut (31) and the second support nut (32) are connected via threads.

3. The structure for controlling the four-way adjustable steering column holding force according to claim 2, characterized in that: A first threaded connection column (34) is axially provided at one end of the first support screw sleeve (31), and an outer wall of the first threaded connection column (34) is provided with an external thread. A second threaded connection column (33) is axially provided at one end of the second support screw sleeve (32), and an inner wall of the second threaded connection column (33) is provided with an internal thread, and the external thread is engaged with the internal thread.

4. The structure for controlling the four-way adjustable steering column holding force according to claim 2, characterized in that: The outer side walls of the first supporting screw sleeve (31) and the second supporting screw sleeve (32) are both polygonal structures.

5. The structure for controlling the four-way adjustable steering column holding force according to claim 1, characterized in that: The upper portion of the clamping side wall (11) is provided with a through groove (13) along the axial direction of the steering outer tube (1), the support bolt (4) passes through the through groove (13), and the end size of the support assembly (3) is larger than the width of the through groove (13).

6. The structure for controlling the four-way adjustable steering column holding force according to claim 1, characterized in that: The outer side wall of the clamping side wall (11) and the mounting bracket (2) are in surface contact fit.

7. The structure for controlling the four-way adjustable steering column holding force according to claim 1, characterized in that: A plane bearing (8) is sleeved on the support bolt (4) between the locking nut (9) and the mounting bracket (2).

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