Middle-position scribing tool and method for steering column

Abstract

The invention relates to a steering column neutral position line marking tool and a line marking method, and belongs to the technical field of line marking tools. The steering column median scribing tool comprises a positioning disc, a pointing piece and a gradienter, the positioning disc is suitable for being installed on a steering column, the positioning disc is provided with a plurality of marking structures, and the marking structures are evenly arranged around the rotating axis of the steering column at equal interval angles; the pointing piece is rotationally connected to the positioning disc or the steering column, the rotating axis of the pointing piece coincides with the rotating axis of the steering column, the pointing piece can point to any marking structure in the rotating radial direction of the pointing piece, the gradienter is connected to the pointing piece, and the gradienter is connected to the steering column. The sensor is used for measuring whether the pointing of the pointing member is horizontal. According to the invention, the influence of the connection error between the steering column and other parts on the scribed line position of the middle position of the steering column can be avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of marking tools, and in particular to a steering column center marking tool. Background Art

[0002] At present, the main steering column center line marking tools are based on the center position of the steering column assembly. For example, the steering column assembly is installed horizontally on the inspection fixture, and the line is marked after the center position of the top of the steering column is determined.

[0003] However, this type of center line marking tool does not take into account the following possible errors when marking: the fixing error between the steering column and the body-in-white, the connection error between the steering column and the intermediate shaft, the connection error between the intermediate shaft and the steering gear, the connection error between the steering gear and the steering knuckle, and the installation error between the steering gear and the subframe. Due to the accumulation of the above errors, when installing the steering column, the center position of the steering column deviates from the original theoretical position. If the steering wheel is still assembled according to the original center line, the steering wheel will deviate from the neutrality. Summary of the invention

[0004] In view of this, the embodiment of the present disclosure provides a steering column center line marking tool and a marking method to prevent the connection error between the steering column and other components from affecting the marking position of the steering column center. The technical solution is as follows:

[0005] In a first aspect, a steering column center line marking tool is provided, the steering column center line marking tool comprising a positioning plate, a pointing member and a level;

[0006] The positioning plate is suitable for being mounted on a steering column, and the positioning plate has a plurality of marking structures, and the plurality of marking structures are evenly arranged at equal interval angles around a rotation axis of the steering column;

[0007] The pointing member is rotatably connected to the positioning plate or the steering column, the rotation axis of the pointing member coincides with the rotation axis of the steering column, and the pointing member can point to any of the marking structures along the radial direction of its own rotation;

[0008] The level is connected to the pointing member and is used to measure whether the pointing member is pointing horizontally.

[0009] In a possible implementation, the pointing member has a wall surface, the wall surface extends along the direction of the pointing member, and the plane where the wall surface is located passes through the rotation axis of the pointing member and can pass through the center of any of the marking structures as the pointing member rotates.

[0010] In a possible implementation, the pointing member includes a connected pointing portion and a connecting portion, the pointing portion extends along the direction of the pointing member, the connecting portion is rotatably connected to the positioning plate or the steering column and is located on a side of the pointing portion close to the steering column, and the wall surface includes a first portion located on the connecting portion and / or a second portion located on the pointing portion close to the steering column.

[0011] In a possible implementation, the marking structure includes a slot, wherein the plurality of slots are evenly arranged on the positioning plate at equal interval angles around the rotation axis of the steering column, the slot is used to insert the first end of the marking rod, and the pointing member has a limiting groove;

[0012] When the first end of the marking rod is inserted into the slot, the limiting groove can cooperate with the second end of the marking rod to achieve circumferential limitation of the pointing member through the cooperation between the limiting groove and the marking rod, and when the second end of the marking rod cooperates with the limiting groove, the axial center line of the corresponding slot is located on the plane where the wall surface is located.

[0013] In a possible implementation, the marking rods include at least two, and the first end of each of the marking rods can be inserted into any of the slots.

[0014] In a possible implementation, a corresponding first indication value is provided next to each of the slots, and each of the first indication values ​​is provided on the positioning plate.

[0015] In a possible implementation, the marking structure includes marking lines, and the plurality of marking lines are evenly arranged on the positioning plate at equal intervals around the rotation axis of the steering column, and each of the marking lines is arranged along the radial direction of rotation of the steering column.

[0016] In a possible implementation, a corresponding second indication value is provided next to each of the marking lines, and each of the second indication values ​​is provided on the positioning plate.

[0017] In a possible implementation, a projection of the positioning plate in a plane perpendicular to the rotation axis of the steering column is a circle, and the center of the circle is located on the rotation axis of the steering column.

[0018] In a second aspect, a marking method for a steering column center marking tool according to any one of the first aspects is provided, the marking method comprising:

[0019] Install the positioning plate on the steering column;

[0020] Rotate the positioning plate clockwise to drive the steering column to rotate clockwise until it cannot rotate further, and rotate the pointing member to a first position. In the first position, the level meter displays that the pointing member is pointing in a horizontal direction, and records the position of the marking structure pointed by the pointing member at this time;

[0021] Rotate the positioning plate counterclockwise to drive the steering column to rotate counterclockwise until it cannot rotate further, and rotate the pointing member to a second position. In the second position, the level meter displays that the pointing member is pointing in a horizontal direction, and records the position of the other marking structure pointed by the pointing member at this time;

[0022] Find the marker structure located midway between the two recorded marker structures;

[0023] Rotating the pointing member to a third position, in which the pointing member points to the marking structure located at a middle position between the two marking structures being recorded;

[0024] A center line is engraved on the steering column along the direction pointed by the pointing member in the third position.

[0025] The solution shown in the present disclosure can mark the center position of the steering column based on the position of the entire vehicle after the steering column and other related components are installed before the steering wheel is installed, thereby avoiding the connection error between the steering column and other components. The influence on the position of the marking line on the center of the steering column is avoided, and the position accuracy of the center line marked on the center of the steering column is improved. Installing the steering wheel according to this line can improve the centering of the steering wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 It is a structural schematic diagram of a steering column center line marking tool provided by an embodiment of the present disclosure;

[0028] Figure 2 It is a disassembled schematic diagram of a steering column center line marking tool provided by an embodiment of the present disclosure;

[0029] Figure 3 is a top view schematic diagram of a steering column center line marking tool provided by an embodiment of the present disclosure;

[0030] Figure 4is a structural schematic diagram of a positioning plate provided by an embodiment of the present disclosure;

[0031] Figure 5 is a schematic structural diagram of another positioning plate provided in an embodiment of the present disclosure;

[0032] Figure 6 is a structural schematic diagram of a pointing member provided by an embodiment of the present disclosure;

[0033] Figure 7 is a structural schematic diagram of a pointing member provided by an embodiment of the present disclosure;

[0034] Figure 8 is a structural schematic diagram of a marking rod provided by an embodiment of the present disclosure;

[0035] Fig. 9 It is a schematic diagram of assembling a steering column center marking tool and a steering column provided by an embodiment of the present disclosure.

[0036] Description of Reference Numerals

[0037] 1. Positioning plate; 11. Slot; 12. Marking line; 13. Mounting hole; 131. First circumferential limiting structure; 14. Annular guide structure; 2. Pointing member; 201. Connecting portion; 202. Pointing portion; 21. Wall surface; 22. Limiting groove; 23. Level mounting seat; 3. Steering column; 4. Marking rod. DETAILED DESCRIPTION

[0038] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0039] The present embodiment specifically relates to a steering column center marking tool, which is suitable for marking the center position of the steering column 3 based on the position of the entire vehicle after the steering column 3 and other related components are installed before the steering wheel is installed. The structural features of the steering column center marking tool will be introduced below.

[0040] like Figure 1 The figure shows the structure of the steering column center line marking tool. Figure 2 The figure shows the disassembly diagram of the steering column center marking tool. Figure 3 The figure shows a top view of the steering column center marking tool. Figure 4 The figure shows a schematic diagram of the structure of a positioning plate. Figure 5 Shown is a schematic diagram of the structure of another positioning plate, such as Figure 6 The structure diagram of the pointing device is shown in FIG. Figure 7 Shown is a schematic diagram of the structure of another pointing member, such as Figure 8 The structure diagram of the marking rod is shown in FIG. Fig. 9 Shown is a schematic diagram of the assembly of the steering column center mark tool and the steering column.

[0041] refer to Figure 2 As shown, the steering column center line marking tool includes a positioning plate 1 , a pointing member 2 and a spirit level, wherein the positioning plate 1 is suitable for being installed on a steering column 3 .

[0042] refer to Figure 4 and Figure 5 As shown, the positioning plate 1 has a plurality of marking structures, and the plurality of marking structures are evenly arranged at equal intervals around the rotation axis of the steering column 3. Each marking structure can be as shown in FIG. Figure 4 and Figure 5 As shown, it is arranged on the upper surface of the positioning plate 1.

[0043] refer to Figure 1 As shown, the pointing member 2 is rotatably connected to the positioning plate 1 or the steering column 3, the rotation axis of the pointing member 2 coincides with the rotation axis of the steering column 3, the pointing member 2 can point to any marking structure along the radial direction of its own rotation, and the level is connected to the pointing member 2 to measure whether the pointing member 2 is pointing horizontally.

[0044] In the disclosed embodiment, before the steering wheel is installed, after the steering column 3 and other related components are installed, after the steering column 3 is rotated clockwise and counterclockwise by a certain angle, it will reach a limit position and cannot be rotated further. These two positions are symmetrical relative to the center position of the steering column 3 at the zero position, and the steering column 3 can also be placed in these two positions by rotating the positioning plate 1. When the steering column 3 is respectively in these two positions, the rotating pointing member 2 points to two different horizontal directions. Since the pointing member 2 can point to any marking structure along the radial direction of its own rotation, and multiple marking structures are evenly arranged at equal intervals around the rotation axis of the steering column 3, the centers of the two marking structures pointed to by the pointing member 2 in these two horizontal directions are also symmetrical relative to the center position of the steering column 3 at the zero position. Then, when the pointing member 2 points to the center of the marking structure located at the center of the two marking structures, the pointing member 2 along the radial direction of its own rotation will pass through the center position of the steering column 3, so that the center line can be engraved on the steering column 3 along the direction pointed by the pointing member 2 at this time. In this way, the connection error between the steering column 3 and other components can be avoided from affecting the position of the engraved line in the middle of the steering column 3, thereby improving the position accuracy of the center line engraved in the middle of the steering column 3. Installing the steering wheel according to this center line can improve the centering of the steering wheel.

[0045] It should be noted that when the middle position of the steering column 3 is at the zero position, the vehicle can only move straight.

[0046] In one example, the positioning plate 1 has a through mounting hole 13, and the steering column 3 passes through the mounting hole 13 from bottom to top, so that the top of the steering column 3 is exposed from above the positioning plate 1, so as to mark the center line at the top of the steering column 3. The mounting hole 13 has a first circumferential limiting structure 131 suitable for matching with the steering column 3, so as to limit the mutual rotation between the positioning plate 1 and the steering column 3 through the first circumferential limiting structure 131. Then, when the positioning plate 1 is rotated, the steering column 3 is driven to rotate around the rotation axis of the steering column 3.

[0047] In one example, the first circumferential limiting structure 131 can be a spline that cooperates with the external spline on the steering column 3 or a single limiting key or multiple limiting keys, so that the limiting between the positioning plate 1 and the steering column 3 is stable and the installation and removal of the positioning plate 1 on the steering column 3 is convenient.

[0048] In one example, the marking structure may be located on the side of the positioning plate 1, or may be located on the side of the positioning plate 1. Figure 4 and Figure 5 The upper surface of the positioning plate 1 is shown.

[0049] In one example, reference Figure 6 As shown, the pointing member 2 has a wall surface 21. The wall surface 21 extends along the direction of the pointing member 2, and the plane where the wall surface 21 is located passes through the rotation axis of the pointing member 2 and can pass through the center of any marking structure as the pointing member 2 rotates. Figure 3 As shown, when the radial direction of the pointing member 2 passes through the middle position of the steering column 3, the plane where the wall surface 21 is located also passes through the middle position of the steering column 3. Therefore, it is possible to engrave a line along the wall surface 21 on the pointing member 2 at the middle position of the steering column 3, thereby avoiding the problem of skewness of the engraved line and improving the accuracy of the engraved line.

[0050] In one example, the pointing member 2 includes a pointing portion 202 and a connecting portion 201 connected to each other. The pointing portion 202 and the connecting portion 201 can be integrally formed, or can be two independent structural members fixed together by clamping or screwing. The pointing portion 202 extends along the direction of the pointing member 2, and the connecting portion 201 is rotatably connected to the positioning plate 1 or the steering column 3 and is located on the side of the pointing portion 202 close to the steering column 3.

[0051] In one example, in order to realize the rotation of the pointing member 2 on the positioning plate 1, refer to Figure 4 As shown, the positioning plate 1 has an annular guide structure 14, the center line of which coincides with the rotation axis of the steering column 3. The connecting portion 201 is used to slide along the annular guide structure 14.

[0052] For example, the annular guide structure 14 may be an annular guide groove, and the connecting portion 201 may be an annular sheet or a ring-shaped sheet that matches the shape of the annular guide groove. Figure 6 The arc-shaped piece shown; the annular guide structure 14 may be a raised annular guide rail, and the connecting portion 201 may be provided with an annular groove or an arc-shaped groove that matches the shape of the annular guide rail.

[0053] The annular guide structure 14 is exemplified by an annular guide groove, and the connecting portion 201 is exemplified by Figure 6 The first end of the connecting portion 201 is inserted into the annular guide structure 14 to realize the connection of the pointing member 2 on the positioning plate 1, and the second end of the connecting portion 201 is connected to the pointing portion 202. Pushing the connecting portion 201 or the pointing portion 202 can realize the rotation of the pointing member 2 on the positioning plate 1.

[0054] In another example, in order to realize the rotation of the pointing member 2 on the steering column 3, refer to Figure 7 As shown, the connecting portion 201 includes a collar, and the pointing portion 202 is connected to the collar, and the inner diameter of the collar is adapted to the diameter of the steering column 3. For example, the inner diameter of the collar is slightly larger than the diameter of the steering column 3, so that the collar can be just fitted outside the steering column 3. The axis of the collar coincides with the rotation axis of the steering column 3 to achieve the connection of the pointing member 2 on the steering column 3. Pushing the collar or the pointing portion 202 can achieve the rotation of the pointing member 2 on the steering column 3.

[0055] In one example, the connecting portion 201 also includes a sleeve, which is installed in the collar and can rotate freely around its own axis in the collar, and the axis of the collar coincides with the axis of the sleeve. The sleeve has a second circumferential limit structure suitable for matching with the steering column 3, so that the sleeve can be installed on the steering column 3 through the second circumferential limit structure and limit the mutual rotation between the sleeve and the steering column 3, so that when the collar is rotated, the collar rotates outside the sleeve. Compared with the previous example, this example can avoid wear caused by the mutual rotation between the collar and the steering column 3, and at the same time can improve the stability of the mutual rotation between the collar and the steering column 3.

[0056] It should be noted that when the sleeve and the collar are installed on the steering column 3, they will not affect the engraved lines of the steering column 3. For example, when the sleeve and the collar are installed on the steering column 3, the top end surface of the steering column 3 is flush with or slightly higher than the highest plane of the sleeve and the collar.

[0057] In one example, the second circumferential limiting structure may be a spline matched with an external spline on the steering column 3 or a single limiting key or a plurality of limiting keys.

[0058] It should be noted that in the above examples, the connection between the pointing member 2 and the positioning plate 1 or the steering column 3 is detachable, but the connection between the pointing member 2 and the positioning plate 1 may also be non-detachable. This embodiment does not limit the specific connection method between the pointing member 2 and the positioning plate 1 or the steering column 3, as long as the pointing member 2 can rotate around the rotation axis of the steering column 3.

[0059] The wall surface 21 may include a first portion located on the connection portion 201 and a second portion located on the pointing portion 202 close to the steering column 3 , or may include only the first portion located on the connection portion 201 , or may include only the second portion located on the pointing portion 202 close to the steering column 3 .

[0060] For example Figure 6 As shown, the connecting portion 201 may be an arc-shaped piece whose axis coincides with the rotation axis of the rotating column 3. The pointing portion 202 may be a pointer, one end of which is connected to the connecting portion 201 and the other end of which extends along the direction of the pointing member 2. The connecting portion 201 and the pointing portion 202 form a quasi-L shape, and only the plane where one side wall of the arc-shaped piece is located may extend along the direction of the pointing member 2 and pass through the rotation axis of the pointing member 2, forming a first part as the wall surface 21; only the plane where one side wall of the pointer is located may extend along the direction of the pointing member 2 and pass through the rotation axis of the pointing member 2, forming a second part as the wall surface 21; and both the plane where one side wall of the arc-shaped piece is located and the plane where one side wall of the pointer is located may extend along the direction of the pointing member 2 and pass through the rotation axis of the pointing member 2, forming a first part and a second part together forming the wall surface 21. Since the wall surface 21 includes a part located close to the steering column 3, the distance between the wall surface 21 and the steering column 3 is relatively close, which can improve the accuracy of the center mark of the steering column 3.

[0061] In one example, reference Figure 4 As shown, the marking structure includes a slot 11. A plurality of slots 11 are evenly arranged on the upper surface of the positioning plate 1 at equal intervals around the rotation axis of the steering column 3, and the slot 11 is used to insert the first end of the marking rod 4. The pointing member 2 has a limiting groove 22. When the first end of the marking rod 4 is inserted into a slot 11, the limiting groove 22 can cooperate with the second end of the marking rod 4, so as to achieve circumferential limitation of the pointing member 2 through the cooperation between the limiting groove 22 and the marking rod 4. And when the second end of the marking rod 4 cooperates with the limiting groove 22, the axis center line of the corresponding slot 11 is located on the plane where the wall surface 21 is located.

[0062] As described above, when the pointing member 2 passes through the middle position of the steering column 3 along the radial direction of its own rotation, the pointing member 2 also points to the center of the corresponding slot 11. At this time, the marking rod 4 is placed in the slot 11 to limit the pointing member 2 circumferentially, so that the middle position is marked on the steering column 3 along the wall surface 21 of the pointing member 2.

[0063] In addition, since the pointing member 2 points to two horizontal directions along its own rotating radial direction, the pointed position may not be the center of any slot 11. In this case, two slots 11 with the smallest corresponding pointing interval angle can be selected to minimize the error.

[0064] In one example, the limiting groove 22 may be a groove located on a side of the pointing portion 202 close to the positioning plate 1, or may be a groove as shown in FIG. Figure 6 The groove shown is located on a side wall of the pointing portion 202 .

[0065] In one example, the first end of the marking rod 4 is adapted to the slot 11, and the second end is adapted to the limiting groove 22. The shape and size of the first end and the shape and size of the second end can be the same or different. For example, the shape of the marking rod 4 can be cylindrical, and the first end and the second end of the marking rod 4 have the same shape and size; the shape of the marking rod 4 can also be as follows Figure 8 In the stepped circular shaft shape shown, the first end and the second end of the marking rod 4 have the same shape but different sizes; the shape of the marking rod 4 can also be a special-shaped shaft with a round shaft at the first end and a square shaft at the second end, and the first end and the second end of the marking rod 4 have the same shape but different sizes.

[0066] In one example, the marking rods 4 include at least two, and the first end of each marking rod 4 can be inserted into any slot 11. In this way, the two marking rods 4 can be inserted into the two slots 11 pointed to by the pointing member 2 when pointing to two horizontal directions, and marked. Then, after finding the other slot 11 located in the middle of the two slots 11, pull out a marking rod 4 and insert it into the slot 11 located in the middle position, and perform subsequent marking operations. This avoids failing to remember the position of the required slot 11, which affects the marking progress.

[0067] In one example, a corresponding first indication is provided next to each slot 11, and each first indication is provided on the positioning plate 1. After finding the two slots 11 pointed to by the pointing member 2 in two horizontal directions, the slot 11 located in the middle of the two slots 11 can be quickly found through the first indication, thereby improving work efficiency.

[0068] In an example, the first indication may be on the upper surface of the positioning disk 1 or on the side surface of the positioning disk 1 .

[0069] In one example, the marking structure includes marking lines 12. A plurality of marking lines 12 are evenly arranged on the positioning plate 1 at equal interval angles around the rotation axis of the steering column 3, and each marking line 12 is arranged along the radial direction of the rotation of the steering column 3. By using the marking lines 12 as the marking structure, a larger number of marking lines can be arranged, so that the middle position marking line 12 found according to the two marking lines 12 pointed to when the pointing member 2 points to two horizontal directions respectively has higher accuracy, thereby improving the accuracy of marking the middle position of the steering column 3.

[0070] In one example, the marking line 12 may be in the form of a groove or a line. This embodiment does not limit the form of the marking line 12, as long as it can achieve the marking function.

[0071] In one example, a corresponding second indication is provided next to each marking line 12, and each second indication is provided on the positioning plate 1. After finding the two marking lines 12 pointed to by the pointing member 2 in two horizontal directions, the marking line 12 located in the middle of the two marking lines 12 can be quickly found through the second indication, thereby improving work efficiency.

[0072] In an example, the plurality of first indications may be natural numbers that are connected in sequence starting from 0 and whose number is the same as the number of slots 11 .

[0073] In an example, the plurality of second indication values ​​may be natural numbers that are connected in sequence starting from 0 and whose number is the same as the number of marking lines 12 .

[0074] In one example, reference Fig. 9 As shown in FIG. 1 , the projection of the positioning plate 1 in a plane perpendicular to the rotation axis of the steering column 3 is a circle, and the center of the circle is located on the rotation axis of the steering column 3. For example, the positioning plate 1 can be a circle, or it can be a Fig. 9 The top surface is open and the hollow truncated cone is larger at the top and smaller at the bottom. The mounting hole 13 can be arranged at the center of the positioning plate 1, which can reduce the space required for the positioning plate 1 to rotate and facilitate manual operation.

[0075] In one example, reference Figure 6 As shown, in order to realize the connection between the level and the pointing member 2, the pointing member 2 has a level mounting seat 23, and the level mounting seat 23 is used to mount the level. The level mounting seat 23 can be located on the connecting portion 201, or it can be located on the connecting portion 201. Figure 6 It is shown as being located on the pointing portion 202. The level is on the level mounting base 23, and can be connected in a non-detachable manner such as welding or gluing, or can be connected in a detachable manner such as magnetic attraction or snap connection.

[0076] In the disclosed embodiment, before installing the steering wheel, after completing the installation of the steering column and other related components, a center line can be engraved on the middle position of the steering column 3 based on the position of the entire vehicle, thereby avoiding the connection error between the steering column 3 and other components affecting the position of the engraved line in the middle of the steering column 3, thereby improving the position accuracy of the center line engraved in the middle of the steering column 3. Installing the steering wheel according to this line can improve the centering of the steering wheel.

[0077] In a second aspect, a marking method for a steering column center marking tool applicable to any embodiment of the first aspect is provided, the marking method comprising:

[0078] The first step is to install the positioning plate 1 on the steering column 3.

[0079] For example, the mounting hole 13 of the positioning plate 1 is sleeved on the steering column 3 , and the internal splines in the mounting hole 13 are matched with the external splines on the steering column 3 .

[0080] The second step is to connect the pointing member 2 and the positioning plate 1.

[0081] For example, the connecting portion 201 of the pointing member 2 is inserted into the annular guide structure 14 of the positioning plate 1 .

[0082] It should be pointed out that the second step can also be performed before the first step, for example, the pointing member 2 and the positioning plate 1 are connected first, and then the positioning plate 1 is installed on the steering column 3 .

[0083] The third step is to connect the level and the pointing member 2 .

[0084] For example, the level is attached to the pointing member 2 by magnetic attraction.

[0085] It should be noted that the third step may also be performed before the second step. For example, the level is firstly adsorbed on the pointing member 2 by magnetic attraction, and then the pointing member 2 and the positioning plate 1 are connected.

[0086] The fourth step is to rotate the positioning plate 1 clockwise to drive the steering column 3 to rotate clockwise until it can no longer rotate, and rotate the pointing member 2 to the first position. In the first position, the level meter shows that the pointing member 2 is pointing in the horizontal direction, and records the position of the marking structure to which the pointing member 2 is pointing at this time.

[0087] For example, the pointing member 2 can be rotated to the first position while the positioning disk 1 is rotated, or the pointing member 2 can be rotated to the first position after the positioning disk 1 is rotated until it cannot be rotated, or the pointing member 2 can be rotated to the first position and the positioning disk 1 can be rotated again until it cannot be rotated, and then the position of the marking structure pointed to by the pointing member 2 is recorded.

[0088] The fifth step is to rotate the positioning plate 1 counterclockwise to drive the steering column 3 to rotate counterclockwise until it can no longer rotate, and rotate the pointing member 2 to the second position. In the second position, the level meter displays that the pointing member 2 is pointing in the horizontal direction, and records the position of another marking structure to which the pointing member 2 is pointing at this time.

[0089] For example, the pointing member 2 can be rotated to the second position while the positioning disk 1 is rotated, or the pointing member 2 can be rotated to the second position after the positioning disk 1 is rotated until it cannot be rotated, or the pointing member 2 can be rotated to the second position and the positioning disk 1 can be rotated again until it cannot be rotated, and then the position of another marking structure pointed to by the pointing member 2 is recorded.

[0090] The sixth step is to find the marker structure located in the middle between the two recorded marker structures.

[0091] For example, the plurality of marking structures are 360 ​​marking lines 12, each of which has a second indication value next to it, and the second indication value is a natural number from 0 to 359. When the second indication values ​​next to two recorded marking lines 12 are 0 and 60, the marking line 12 with a second indication value of 30 next to it can be found.

[0092] It should be noted that there is no order restriction for the fifth step and the sixth step, and the sixth step can also be performed before the fifth step.

[0093] The seventh step is to rotate the pointing member 2 to a third position. In the third position, the pointing member 2 points to the center of the marking structure located in the middle between the two recorded marking structures.

[0094] For example, the pointing member 2 is rotated to the third position so that the plane where the wall surface 21 is located passes through the marking line 12 with the second indication value of 30 next to it.

[0095] The eighth step is to carve a center line on the steering column 3 along the direction pointed by the pointing member 2 in the third position.

[0096] For example, a carving knife or other tools are used to carve lines on the top surface of the steering column 3 along the wall surface 21 .

[0097] In the disclosed embodiment, the center line of the steering column 3 is engraved by the engraving method, and before the steering wheel is installed, after the steering column and other related components are installed, the center line can be engraved on the center of the steering column 3 based on the position of the whole vehicle. This avoids the connection error between the steering column 3 and other components from affecting the engraved position of the center of the steering column 3, thereby improving the position accuracy of the center line engraved on the center of the steering column 3. Installing the steering wheel according to this center line can improve the centering of the steering wheel.

[0098] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A steering column center line marking tool, characterized in that: The steering column center line marking tool comprises a positioning plate (1), a pointing member (2) and a level; The positioning plate (1) is suitable for being mounted on a steering column (3), and the positioning plate (1) has a plurality of marking structures, and the plurality of marking structures are evenly arranged at equal interval angles around the rotation axis of the steering column (3); The pointing member (2) is rotatably connected to the positioning plate (1) or the steering column (3), the rotation axis of the pointing member (2) coincides with the rotation axis of the steering column (3), and the pointing member (2) can point to any of the marking structures along the radial direction of its own rotation; The level is connected to the pointing member (2) and is used to measure whether the pointing member (2) is pointing horizontally.

2. The steering column center marking tool according to claim 1, characterized in that: The pointing member (2) has a wall surface (21), the wall surface (21) extends in the direction of the pointing member (2), and the plane where the wall surface (21) is located passes through the rotation axis of the pointing member (2) and can pass through the center of any marking structure as the pointing member (2) rotates.

3. The steering column center marking tool according to claim 2, characterized in that: The pointing member (2) comprises a connected pointing portion (202) and a connecting portion (201); the pointing portion (202) extends along the direction of the pointing member (2); the connecting portion (201) is rotatably connected to the positioning plate (1) or the steering column (3) and is located on a side of the pointing portion (202) close to the steering column (3); and the wall surface (21) comprises a first portion located on the connecting portion (201) and / or a second portion located on the pointing portion (202) close to the steering column (3).

4. The steering column center marking tool according to claim 2, characterized in that: The marking structure comprises a slot (11), wherein the plurality of slots (11) are evenly arranged on the positioning plate (1) at equal interval angles around the rotation axis of the steering column (3), the slot (11) is used to insert the first end of the marking rod (4), and the pointing member (2) has a limiting groove (22); When the first end of the marking rod (4) is inserted into the slot (11), the limiting groove (22) can cooperate with the second end of the marking rod (4) to achieve circumferential limitation of the pointing member (2) through the cooperation between the limiting groove (22) and the marking rod (4); and when the second end of the marking rod (4) cooperates with the limiting groove (22), the axis center line of the corresponding slot (11) is located on the plane where the wall surface (21) is located.

5. The steering column center marking tool according to claim 4, characterized in that: The marking rods (4) include at least two, and the first end of each marking rod (4) can be inserted into any one of the slots (11).

6. The steering column center marking tool according to claim 4, characterized in that: A corresponding first indication value is provided beside each of the slots (11), and each of the first indication values ​​is provided on the positioning plate (1).

7. The steering column center marking tool according to claim 1, characterized in that: The marking structure comprises marking lines (12), wherein the plurality of marking lines (12) are evenly arranged on the positioning plate (1) at equal interval angles around the rotation axis of the steering column (3), and each of the marking lines (12) is arranged along the radial direction of rotation of the steering column (3).

8. The steering column center marking tool according to claim 7, characterized in that: A corresponding second indication value is provided beside each of the marking lines (12), and each of the second indication values ​​is provided on the positioning plate (1).

9. The steering column center marking tool according to claim 1, characterized in that: The projection of the positioning plate (1) in a plane perpendicular to the rotation axis of the steering column (3) is a circle, and the center of the circle is located on the rotation axis of the steering column (3).

10. A marking method for a steering column center marking tool according to any one of claims 1 to 9, characterized in that: The marking method comprises: Install the positioning plate (1) on the steering column (3); The positioning plate (1) is rotated clockwise to drive the steering column (3) to rotate clockwise until it cannot rotate further, and the pointing member (2) is rotated to a first position. In the first position, the level meter shows that the pointing member (2) is pointing in a horizontal direction, and records the position of the marking structure pointed by the pointing member (2) at this time; The positioning plate (1) is rotated counterclockwise to drive the steering column (3) to rotate counterclockwise until it cannot rotate further, and the pointing member (2) is rotated to a second position. In the second position, the level meter shows that the pointing member (2) is pointing in a horizontal direction, and records the position of the other marking structure pointed by the pointing member (2) at this time; Find the marker structure located midway between the two recorded marker structures; Rotating the pointing member (2) to a third position, wherein the pointing member (2) points to the marking structure located at a middle position between the two marking structures being recorded; A center line is engraved on the steering column (3) along the direction pointed by the pointing member (2) in the third position.

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