Height adjusting assembly and steering column
By achieving axial sliding connection and circumferential stable connection between the flexible shaft of the steering column and the main shaft, the load vibration and noise problems caused by stress concentration during the height adjustment process are solved, and a more stable and silent height adjustment effect is achieved.
Patent Information
- Application Number
- CN202420109126.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-16
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-01-16
AI Technical Summary
During the height adjustment process of the existing steering column, due to the concentration of stress between the flexible shaft and the spindle, the load vibration and working noise are caused.
By achieving a slidable connection between the flexible shaft and the main shaft in the axial direction and maintaining relatively constant in the circumferential direction, stress concentration is reduced, and a stable connection is achieved through the sliding groove and sliding pin structure.
It effectively reduces stress concentration between the spindle and the flexible shaft, reduces load vibration and working noise, and improves the stability and silent effect of height adjustment.
Smart Images
Figure CN222474246U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of steering columns, in particular to a height adjustment component and a steering column. Background Art
[0002] The existing steering column can be adjusted in two directions, one is the vertical direction and the other is the axial direction. When adjusting in the vertical direction, the motor drives the flexible shaft to rotate, and then the flexible shaft drives the main shaft to rotate, and the main shaft rotates and converts its rotational motion into the linear motion of the nut seat, so that the height adjustment bracket moves vertically along the linear motion direction of the nut seat.
[0003] However, due to the fixed connection between the existing flexible shaft and the main shaft, as the height adjustment bracket moves in the vertical direction, the stress between the main shaft and the flexible shaft increases, the flexible shaft undergoes a certain deformation, and even causes load vibration of the height adjustment mechanism, thereby causing working noise.
[0004] Therefore, it is necessary to design a height adjustment component and a steering column that can eliminate the stress concentration between the flexible shaft and the main shaft, reduce load vibration, and reduce working noise. Utility Model Content
[0005] The utility model aims to overcome the deficiencies of the prior art and provide a height adjustment component and a steering column which can eliminate stress concentration between a flexible shaft and a main shaft, reduce load vibration, and lower working noise.
[0006] The technical solution of the utility model provides a height adjustment component, including a motor, a flexible shaft, a main shaft, a nut seat and a height adjustment bracket, the motor drives the flexible shaft to rotate, the flexible shaft is connected to the main shaft, the main shaft is connected to the height adjustment bracket through the nut seat, the flexible shaft and the main shaft are slidably connected along the axial direction, and are relatively stationary along the circumferential direction.
[0007] Further, one of the main shaft and the flexible shaft comprises a plug-in tube, a sliding groove is provided on the plug-in tube, and the length direction of the sliding groove is along the axial direction;
[0008] The other one of the main shaft and the flexible shaft includes a sliding pin, which is inserted into the sliding groove and can slide in the sliding groove, and the sliding pin and the sliding groove are relatively fixed in the circumferential direction.
[0009] Furthermore, the plug-in tube is fixedly connected to one end of the main shaft, a fixing hole is opened on one end of the flexible shaft, the sliding pin passes through the sliding groove and is fixedly connected to the fixing hole, and the flexible shaft is inserted into the plug-in tube.
[0010] Furthermore, the sliding groove includes two end portions and a middle section, the middle section is linear, and the end portions are semicircular.
[0011] Furthermore, the sliding pin includes a fixed end, a sliding rod and a stop end, the fixed end is fixedly connected to the fixing hole, the sliding rod passes through the sliding groove, the stop end is located outside the sliding groove, and the diameter of the stop end is greater than the width of the sliding groove.
[0012] Furthermore, the diameter of the flexible shaft is smaller than the inner diameter of the plug tube.
[0013] Furthermore, the plug-in tube is fixedly connected to one end of the flexible shaft, a fixing hole is opened on one end of the main shaft, the sliding pin passes through the sliding groove and is fixedly connected to the fixing hole, and the main shaft is inserted into the plug-in tube.
[0014] Furthermore, the diameter of the main shaft is smaller than the inner diameter of the plug-in tube.
[0015] The utility model also provides a steering column, comprising a steering shaft and a column sleeve, wherein the column sleeve is sleeved on the outside of the steering shaft, and further comprising any one of the height adjustment components described above.
[0016] Furthermore, the height adjustment bracket is installed outside the column sleeve, and the motor, the flexible shaft and the main shaft are located on one side of the height adjustment bracket.
[0017] After adopting the above technical solution, the following beneficial effects are achieved:
[0018] The utility model connects the flexible shaft and the main shaft slidably in the axial direction and is relatively immovable in the circumferential direction. The flexible shaft can drive the main shaft to rotate. When one end of the main shaft moves in the vertical direction along with the height adjustment bracket, the main shaft and the flexible shaft slide in the axial direction, which reduces the stress concentration between the main shaft and the flexible shaft, reduces load vibration, and reduces working noise. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The disclosure of the present invention will become easier to understand with reference to the accompanying drawings. It should be understood that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings:
[0020] Figure 1 is a top view of a steering column in one embodiment of the utility model;
[0021] Figure 2 is a bottom view of a steering column in one embodiment of the utility model;
[0022] Figure 3 It is a partial enlarged view of the height adjustment component in one embodiment of the utility model.
[0023] Reference table of reference numerals:
[0024] Steering shaft 10, column sleeve 20;
[0025] Flexible shaft 2: sliding pin 21, stop end 211;
[0026] Spindle 3: plug-in tube 31, sliding groove 32;
[0027] Motor 1, nut seat 4, height adjustment bracket 5. DETAILED DESCRIPTION
[0028] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings.
[0029] It is easy to understand that according to the technical solution of the utility model, without changing the essential spirit of the utility model, a variety of structural modes and implementation modes can be replaced by those skilled in the art. Therefore, the following specific implementation methods and drawings are only exemplary descriptions of the technical solution of the utility model, and should not be regarded as the entirety of the utility model or as a limitation or restriction on the technical solution of the utility model.
[0030] The directional terms such as up, down, left, right, front, back, front, back, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. They are relative concepts and may change accordingly according to different positions and different usage conditions. Therefore, these or other directional terms should not be interpreted as restrictive terms.
[0031] In some embodiments of the present invention, Figure 1-2 As shown, the height adjustment assembly includes a motor 1, a flexible shaft 2, a main shaft 3, a nut seat 4 and a height adjustment bracket 5. The motor 1 drives the flexible shaft 2 to rotate. The flexible shaft 2 is connected to the main shaft 3. The main shaft 3 is connected to the height adjustment bracket 5 through the nut seat 4. The flexible shaft 2 and the main shaft 3 are slidably connected in the axial direction, and the main shaft 3 and the flexible shaft 2 are relatively stationary in the circumferential direction.
[0032] Specifically, the motor 1 is installed on one side of the height adjustment bracket 5, and the motor 1 is arranged in parallel with the flexible shaft 2, and the motor 1 can drive the rotation of the flexible shaft 2. The flexible shaft 2 and the main shaft 3 are arranged roughly in the same straight line direction, and one end of the main shaft 3 is connected to the flexible shaft 2, and the flexible shaft 2 can drive the main shaft 3 to rotate synchronously. The other end of the main shaft 3 is connected to the nut seat 4, and the nut seat 4 is connected to the height adjustment bracket 5.
[0033] In the present invention, “axial direction” refers to the central axis direction of the flexible shaft 2 and the main shaft 3 , and “circumferential direction” refers to the circumferential direction of the flexible shaft 2 and the main shaft 3 .
[0034] When the motor 1 drives the flexible shaft 2, the flexible shaft 2 drives the main shaft 3 to rotate, the main shaft 3 rotates and converts its rotational motion into linear motion of the nut seat 4 along the axial direction, and the nut seat 4 drives the height adjustment bracket 5 to move in the vertical direction, thereby realizing the vertical angle adjustment of the steering column. Here, the "vertical direction" and the "axial direction" are perpendicular to each other.
[0035] During the height adjustment process, the flexible shaft 2 and the main shaft 3 are axially slidable. Therefore, when the height adjustment bracket 5 moves in the vertical direction, the nut seat 4 and one end of the main shaft 3 are driven to move in the vertical direction, and the connection between the main shaft 3 and the flexible shaft 2 generates axial relative movement, thereby avoiding the increase of stress between the flexible shaft 2 and the main shaft 3, avoiding deformation of the flexible shaft 2, and reducing the load vibration of the height adjustment bracket 5 and reducing working noise.
[0036] Further, one of the main shaft 3 and the flexible shaft 2 includes a plug-in tube 31, and a sliding groove 32 is formed on the plug-in tube 31, and the length direction of the sliding groove 32 is along the axial direction;
[0037] The other one of the main shaft 3 and the flexible shaft 2 includes a sliding pin 21 . The sliding pin 21 is inserted into the sliding groove 32 and can slide in the sliding groove 32 . The sliding pin 21 and the sliding groove 32 are relatively fixed in the circumferential direction.
[0038] Since the sliding pin 21 and the sliding groove 32 are relatively stationary along the circumferential direction, the flexible shaft 2 can drive the main shaft 3 to rotate, and there is no relative displacement between the flexible shaft 2 and the main shaft 3 along the circumferential direction, thereby ensuring stability during rotation.
[0039] In this embodiment, Figure 3 As shown, the plug-in tube 31 is fixedly connected to one end of the main shaft 3, a fixing hole (not shown) is opened on one end of the flexible shaft 2, the sliding pin 21 passes through the sliding groove 32 and is fixedly connected to the fixing hole, and the flexible shaft 2 is inserted into the plug-in tube 31.
[0040] Specifically, the flexible shaft 2 is inserted into the plug tube 31, and there is a clearance fit between the flexible shaft 2 and the inner wall of the plug tube 31. One end of the sliding pin 21 is fixedly connected to the flexible shaft 2, and the other end of the sliding pin 21 can slide axially in the sliding groove 32, and the sliding groove 32 has a certain length in the axial direction. When the main shaft 3 moves along the vertical direction following the height adjustment bracket 5, the main shaft 3 and the flexible shaft 2 move relative to each other in the axial direction.
[0041] Optionally, the plug-in tube 31 may also be fixedly connected to the flexible shaft 2 , the sliding pin 21 is fixed on one end of the main shaft 3 , and then the main shaft 3 is inserted into the plug-in tube 31 .
[0042] Furthermore, if Figure 3As shown, the sliding groove 32 includes two end portions and a middle section, the middle section is linear, and the end portions are semicircular.
[0043] The sliding pin 21 is cylindrical. When the sliding pin 21 slides to the end of the sliding groove 32, the sliding pin 21 just fits with the semicircular end.
[0044] Optionally, the end of the sliding groove 32 may also be a straight edge, which is perpendicular to the middle section; the cross section of the sliding pin 21 may be a rectangle.
[0045] Furthermore, the sliding pin 21 includes a fixed end (not shown), a sliding rod (not shown) and a stop end 211, the fixed end is fixedly connected to the fixing hole, the sliding rod passes through the sliding groove 32, the stop end 211 is located outside the sliding groove 32, and the diameter of the stop end 211 is greater than the width of the sliding groove 32.
[0046] Specifically, since the diameter of the stopper end 211 is larger than the width of the sliding groove 32, the relative displacement between the sliding pin 21 and the sliding groove 32 in the radial direction can be limited, thereby ensuring that the sliding pin 21 and the sliding groove 32 are relatively immobile in the circumferential direction. At the same time, the sliding pin 21 will not fall off the sliding groove 32 during the sliding process along the sliding groove 32.
[0047] In one embodiment of the utility model, when the plug tube 31 is fixedly connected to the main shaft 3, the diameter of the flexible shaft 2 is smaller than the inner diameter of the plug tube 31, the flexible shaft 2 can be inserted into the plug tube 31, and there is a clearance fit between the flexible shaft 2 and the plug tube 31.
[0048] Optionally, when the plug tube 31 is fixedly connected to the flexible shaft 2 , the main shaft 3 is inserted into the plug tube 31 , at which time the diameter of the main shaft 3 is smaller than the inner diameter of the plug tube 31 , and there is a clearance fit between the main shaft 3 and the plug tube 31 .
[0049] In some embodiments of the present invention, Figure 1-2 As shown, the steering column includes a steering shaft 10 and a column sleeve 20, the column sleeve 20 is sleeved on the outside of the steering shaft 10, and also includes a height adjustment assembly in any of the above embodiments. The height adjustment bracket 5 is used to adjust the angle between the column sleeve 20 and the steering shaft 10 in the vertical direction. While avoiding the increase of stress between the flexible shaft 2 and the main shaft 3, the load vibration of the height adjustment bracket 5 can be reduced, and the working noise of the steering column can be reduced.
[0050] Furthermore, if Figure 1-2 As shown, the height adjustment bracket 5 is installed outside the column sleeve 20, and the motor 1, the flexible shaft 2 and the main shaft 3 are located on one side of the height adjustment bracket 5. The motor 1, the flexible shaft 2 and the main shaft 3 are arranged compactly with the height adjustment bracket 5, and the structure is reasonable.
[0051] The utility model connects the flexible shaft and the main shaft slidably in the axial direction, and the two are relatively immovable in the circumferential direction. The flexible shaft can drive the main shaft to rotate, and when one end of the main shaft moves in the vertical direction along with the height adjustment bracket, the main shaft and the flexible shaft slide in the axial direction, which reduces the stress concentration between the main shaft and the flexible shaft, and can reduce load vibration and reduce working noise.
[0052] The above description is only the principle and preferred embodiment of the utility model. It should be pointed out that for ordinary technicians in this field, on the basis of the principle of the utility model, several other variations can be made, which should also be regarded as the protection scope of the utility model.
Claims
1. A height adjustment assembly, comprising a motor, a flexible shaft, a spindle, a nut seat and a height adjustment bracket, wherein the motor drives the flexible shaft to rotate, the flexible shaft is connected to the spindle, and the spindle is connected to the height adjustment bracket through the nut seat, characterized in that: The flexible shaft is slidably connected to the main shaft along the axial direction and is relatively immovable along the circumferential direction.
2. The height adjustment assembly according to claim 1, characterized in that: One of the main shaft and the flexible shaft includes a plug-in tube, the plug-in tube is provided with a sliding groove, and the length direction of the sliding groove is along the axial direction; The other one of the main shaft and the flexible shaft includes a sliding pin, which is inserted into the sliding groove and can slide in the sliding groove, and the sliding pin and the sliding groove are relatively fixed in the circumferential direction.
3. The height adjustment assembly according to claim 2, characterized in that: The plug-in tube is fixedly connected to one end of the main shaft, a fixing hole is opened on one end of the flexible shaft, the sliding pin passes through the sliding groove and is fixedly connected to the fixing hole, and the flexible shaft is inserted into the plug-in tube.
4. The height adjustment assembly according to claim 2, characterized in that: The sliding groove comprises two end portions and a middle section, the middle section is in a straight line shape, and the end portions are in a semicircular shape.
5. The height adjustment assembly according to claim 3, characterized in that: The sliding pin includes a fixed end, a sliding rod and a stop end, the fixed end is fixedly connected to the fixing hole, the sliding rod passes through the sliding groove, the stop end is located outside the sliding groove, and the diameter of the stop end is greater than the width of the sliding groove.
6. The height adjustment assembly according to claim 3, characterized in that: The diameter of the flexible shaft is smaller than the inner diameter of the plug tube.
7. The height adjustment assembly according to claim 2, characterized in that: The plug-in tube is fixedly connected to one end of the flexible shaft, a fixing hole is opened on one end of the main shaft, the sliding pin passes through the sliding groove and is fixedly connected to the fixing hole, and the main shaft is inserted into the plug-in tube.
8. The height adjustment assembly according to claim 7, characterized in that: The diameter of the main shaft is smaller than the inner diameter of the spigot.
9. A steering column, comprising a steering shaft and a column sleeve, wherein the column sleeve is sleeved on the outside of the steering shaft, characterized in that: It also includes the height adjustment assembly according to any one of claims 1-8.
10. The steering column according to claim 9, characterized in that: The height-adjusting bracket is installed outside the column sleeve, and the motor, the flexible shaft and the main shaft are located on one side of the height-adjusting bracket.