Bi-directional adjustment movable nut structure and vehicle boarding pedal assembly

Abstract

The present invention discloses a two-way adjustable movable nut structure and a boarding pedal assembly. The two-way adjustable movable nut structure comprises a base plate, a limit plate and a movable nut. The base plate is formed with an adjustment square hole. The limit plate and the base plate are arranged opposite to each other. The limit plate is provided with at least three limit feet connected to the base plate, and at least three limit feet are arranged on the peripheral side of the adjustment square hole. A clearance gap is formed between two adjacent limit feet. An adjustment cavity is formed between the limit feet, the limit plate and the base plate. The movable nut is movably arranged in the adjustment cavity along the extension direction of the limit plate. The threaded hole of the movable nut is arranged corresponding to the adjustment square hole. At least three anti-rotation arms are formed on the peripheral side of the movable nut. At least three anti-rotation arms extend out of the corresponding clearance gaps respectively. In the process of screwing the movable nut, at least one anti-rotation arm can abut against the corresponding limit foot. The problem of large volume and heavy weight of the existing movable nut structure is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of movable nuts, and particularly to a two-way adjustable movable nut structure and a vehicle boarding pedal assembly. Background Art

[0002] When aligning and installing the vehicle boarding pedal guard plate with the front bumper body, in order to meet the requirements of the gap surface difference between the vehicle boarding pedal guard plate and the front bumper body, the vehicle boarding pedal guard plate needs to be slightly adjusted along the vehicle width direction and the vehicle length direction during assembly. Usually, technicians will use a movable nut structure for adjustment and installation. The existing movable nut structure generally includes a bracket, a movable nut plate, and a limit seat. The limit seat is arranged on the bracket to form a limit cavity. The movable nut plate is arranged in the limit cavity and is spaced from the side wall of the limit cavity. The bracket is provided with a limit hole communicating with the limit cavity. An external locking screw is connected to the movable nut plate through the limit hole to connect the vehicle boarding pedal guard plate to the bracket. After driving the movable nut plate to the target position by the locking screw, the locking screw can be screwed to drive the movable nut plate to rotate. At the same time, due to the limiting effect of the inner wall of the limit cavity, the movable nut plate cannot rotate along with the locking screw, so as to lock and fasten itself, thus completing the adjustment and fixing of the position of the vehicle boarding pedal guard plate on the bracket according to the front bumper body.

[0003] However, in the existing movable nut structure, the position adjustment of the locking screw is completed by the abutment of the movable nut plate against the inner wall of the limit cavity. Therefore, the interval dimension between the movable nut plate and the inner wall of the limit cavity becomes the main factor restricting the adjustment amount of the locking screw. At the same time, in order for the movable nut plate to rotate to abut against the inner wall of the limit cavity at any position in the limit cavity, the size specification of the movable nut plate is related to the size specification of the limit cavity. Therefore, on the premise of ensuring that the locking screw has a certain adjustment amount, the size specifications of both the movable nut plate and the limit cavity are affected by the adjustment amount, resulting in the common problems of relatively large size and relatively large weight in the existing movable nut structure. Summary of the Invention

[0004] The main object of the present invention is to propose a two-way adjustable movable nut structure and a vehicle boarding pedal assembly, aiming to solve the problems of relatively large volume and relatively large weight in the existing movable nut structure.

[0005] To achieve the above object, the two-way adjustable movable nut structure proposed by the present invention includes:

[0006] A base plate, formed with an adjustment square hole;

[0007] a limit plate, arranged opposite to the base plate, the limit plate being provided with at least three limit feet connected to the base plate, and the at least three limit feet being arranged on the peripheral side of the adjustment square hole, a clearance gap being formed between two adjacent limit feet, and an adjustment cavity being formed between the limit feet, the limit plate and the base plate; and,

[0008] A movable nut is movably arranged in the adjustment cavity along the extension direction of the limit plate, the threaded hole of the movable nut is arranged corresponding to the adjustment square hole, at least three anti-rotation arms are formed on the circumference of the movable nut, and the at least three anti-rotation arms extend out of the corresponding clearance gaps respectively;

[0009] Wherein, during the process of screwing the movable nut, at least one of the anti-rotation arms can abut against the corresponding limiting foot.

[0010] Optionally, the movable nut is arranged in a square shape corresponding to the adjusting square hole, and the projection of the movable nut in the thickness direction thereof can cover the adjusting square hole.

[0011] Optionally, the limit feet and the stop arms correspond one-to-one to form a stop limit group, and four stop limit groups are provided, and four stop arms are formed at four diagonal positions of the movable nut.

[0012] Optionally, a square hole is formed on the limiting plate corresponding to the adjusting square hole.

[0013] Optionally, the limiting plate is arranged in a square shape based on the making way square hole.

[0014] Optionally, the limiting feet correspond one-to-one with the anti-rotation arms to form an anti-rotation limiting group, and four groups of the anti-rotation limiting groups are provided, and four limiting feet are formed in the middle of the side end of the limiting plate.

[0015] Optionally, the limit feet and the anti-rotation arms correspond one to one to form an anti-rotation limit group, and four groups of the anti-rotation limit groups are provided. The limit plate and the movable nut are respectively arranged in a square shape corresponding to the adjustment square hole, and the four anti-rotation arms are formed at the four diagonal positions of the movable nut, and the four limit feet are formed at the middle of the side end of the limit plate;

[0016] The outer distance between the two relatively arranged limit feet is n, the one-way adjustment amount of the movable nut is r, the distance between the distal ends of the two relatively arranged stop arms is b, the width of the limit feet is f, the width of the movable nut is a, the width of the stop arm is c, and the thickness of the limit feet is s, wherein:

[0017] n>4r+f+2c / sin45°+2s, and / or, a≤n-2r-2s, and / or, b>n-2s.

[0018] Optionally, the limiting foot and the limiting plate are integrally formed.

[0019] The present invention further provides a boarding pedal assembly, the boarding pedal assembly comprising the above-mentioned two-way adjustable movable nut structure, the movable nut structure comprising:

[0020] A base plate is formed with an adjustment square hole;

[0021] a limit plate, arranged opposite to the base plate, the limit plate being provided with at least three limit feet connected to the base plate, and the at least three limit feet being arranged on the peripheral side of the adjustment square hole, a clearance gap being formed between two adjacent limit feet, and an adjustment cavity being formed between the limit feet, the limit plate and the base plate; and,

[0022] A movable nut is movably arranged in the adjustment cavity along the extension direction of the limit plate, the threaded hole of the movable nut is arranged corresponding to the adjustment square hole, at least three anti-rotation arms are formed on the circumference of the movable nut, and the at least three anti-rotation arms extend out of the corresponding clearance gaps respectively;

[0023] Wherein, during the process of screwing the movable nut, at least one of the anti-rotation arms can abut against the corresponding limiting foot.

[0024] Optionally, the vehicle pedal assembly comprises:

[0025] A support body, wherein the support body includes the substrate;

[0026] A boarding pedal is formed with a connection hole corresponding to the adjustment square hole; and

[0027] A countersunk screw passes through the connecting hole and the adjusting square hole and is connected to the threaded hole of the movable nut.

[0028] In the technical solution provided by the present invention, the anti-rotation arm extends into the clearance gap so as to be able to abut against the limit foot from the side end of the limit foot, thereby playing a role in stopping the rotation of the movable nut. When the movable nut needs to adjust its displacement, the anti-rotation arm can move along the adjustment movement direction of the movable nut through the clearance gap, and will not affect the adjustment amount of the movable nut. At the same time, the adjustment amount of the movable nut is only limited by the size of the adjustment square hole, and the movable nut itself only has the function of connecting the locking screw, and its size does not need to be set larger. On the premise of retaining the movable gap for adjusting the movable nut, the spacing between at least three of the limit feet can be greatly reduced, thereby greatly reducing the overall size of the two-way adjustable movable nut structure and reducing the weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0030] Figure 1 It is a schematic plan view of the structure of the existing movable nut plate;

[0031] Figure 2 is Figure 1 a schematic cross-sectional view along the section line A-A of the structure of the movable nut plate in

[0032] Figure 3 is Figure 2 a schematic dimension marking view of the structure of the movable nut plate in

[0033] Figure 4 It is a schematic plan view of the structure of the bidirectional adjustable movable nut structure provided by the present invention;

[0034] Figure 5 is Figure 4 a schematic cross-sectional view along the section line B-B of the bidirectional adjustable movable nut structure in

[0035] Figure 6 is Figure 4 a schematic dimension marking view of the bidirectional adjustable movable nut structure in

[0036] Figure 7 is Figure 5 a schematic dimension marking view of the bidirectional adjustable movable nut structure in

[0037] Figure 8 is Figure 4 a schematic plan view of the bidirectional adjustable movable nut structure in which the movable thread is in the first position;

[0038] Figure 9 is Figure 4 a schematic plan view of the bidirectional adjustable movable nut structure in which the movable thread is in the second position;

[0039] Figure 10 is Figure 4 a schematic dimension marking view of the bidirectional adjustable movable nut structure in which the movable thread is in the third position.

[0040] Explanation of the reference numerals in the drawings:

[0041] Label Name Label Name 100 Bi-directional adjustment movable nut structure 31 Threaded hole 1 Substrate 32 Anti-rotation arm 11 Adjustment square hole 100’ Movable nut structure 1a Adjustment cavity 1’ Bracket 2 Limit plate 11’ Adjustment hole 21 Limit foot 2’ Movable nut plate 21a Relief gap 21’ Threaded connection hole 22 Relief square hole 3’ Limit seat 3 Movable nut

[0042] The realization, functional features and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0044] It should be noted that if there are directional indications involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0045] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0046] When aligning and installing the boarding pedal guard plate with the front bumper body, in order to meet the requirements of the gap surface difference between the boarding pedal guard plate and the front bumper body, during the assembly of the boarding pedal guard plate, it is necessary to make a small amount of adjustment along the vehicle width direction and the vehicle length direction. Please refer to Figures 1 to 3 , usually technicians will use the movable nut structure 100' for adjustment and installation. The existing movable nut structure 100' generally includes a bracket 1', a movable nut plate 2' and a limit seat 3'. The limit seat 3' is arranged on the bracket 1' to form a limit cavity. The movable nut plate 2' is arranged in the limit cavity and is spaced from the side wall of the limit cavity. The bracket 1' is provided with a limit hole 11' communicating with the limit cavity. The external locking screw is connected to the threaded connection hole 21' of the movable nut plate 2' through the limit hole 11' to connect the boarding pedal guard plate to the bracket 1'. After driving the movable nut plate 2' to the target position by the locking screw, turning the locking screw can drive the movable nut plate 2' to rotate. At the same time, due to the limiting effect of the inner wall of the limit cavity, the movable nut plate 2' cannot rotate with the locking screw, so it is self-locked and fastened, thus completing the adjustment and fixing of the position of the boarding pedal guard plate on the bracket 1' according to the front bumper body.

[0047] However, in the existing movable nut structure 100', the position of the locking screw is adjusted by the contact between the movable nut plate 2' and the inner wall of the limiting cavity, so the spacing between the movable nut plate 2' and the inner wall of the limiting cavity becomes the main factor limiting the adjustment amount of the locking screw. At the same time, in order for the movable nut plate 2' to be able to rotate to contact the inner wall of the limiting cavity at any position in the limiting cavity, the size of the movable nut plate 2' is related to the size of the limiting cavity. Therefore, under the premise of ensuring that the locking screw has a certain amount of adjustment, the size of the movable nut plate 2' and the limiting cavity are affected by the amount of adjustment, resulting in the existing movable nut structure 100' generally having the problem of large size and heavy weight.

[0048] In view of this, the present invention proposes a two-way adjustable movable nut structure 100 and a boarding pedal assembly, aiming to solve the problem of the existing movable nut structure 100' being large in size and heavy in weight, wherein Figures 4 to 10 It is a structural schematic diagram of an embodiment of a bidirectional adjustable movable nut structure 100 provided by the present invention.

[0049] Please refer to 4. Figure 5 , Figures 8 to 10 , the bidirectional adjustment movable nut structure 100 includes a base plate 1, a limit plate 2 and a movable nut 3, the base plate 1 is formed with an adjustment square hole 11; the limit plate 2 is arranged opposite to the base plate 1, the limit plate 2 is provided with at least three limit feet 21 connected to the base plate 1, and the at least three limit feet 21 are arranged on the peripheral side of the adjustment square hole 11, and a clearance gap 21a is formed between two adjacent limit feet 21, and an adjustment cavity 1a is formed between the limit feet 21, the limit plate 2 and the base plate 1; the movable nut 3 is movably arranged in the adjustment cavity 1a along the extension direction of the limit plate 2, the threaded hole 31 of the movable nut 3 is arranged corresponding to the adjustment square hole 11, and at least three stop arms 32 are formed on the peripheral side of the movable nut 3, and the at least three stop arms 32 respectively extend out of the corresponding clearance gaps 21a; wherein, in the process of screwing the movable nut 3, at least one of the stop arms 32 can abut against the corresponding limit foot 21.

[0050] In the technical solution provided by the present invention, the anti-rotation arm 32 extends into the clearance gap 21a so as to be able to abut against the limit foot 21 from the side end of the limit foot 21, thereby playing a role in stopping the rotation of the movable nut 3. When the movable nut 3 needs to adjust its displacement, the anti-rotation arm 32 can move along the adjustment movement direction of the movable nut 3 through the clearance gap 21a, and will not affect the adjustment amount of the movable nut 3. At the same time, the adjustment amount of the movable nut 3 is only limited by the size of the adjustment square hole 11, and the movable nut 3 itself only has the function of connecting the locking screw, and its size does not need to be set larger. On the premise of retaining the movable gap for adjusting the movable nut 3, the spacing between at least three limit feet 21 can be greatly reduced, thereby greatly reducing the overall size of the two-way adjustable movable nut structure 100 and reducing the weight.

[0051] Further, see 4 and Figure 5 In this embodiment, the movable nut 3 is arranged in a square shape corresponding to the adjustment square hole 11, and the projection of the movable nut 3 in the thickness direction can cover the adjustment square hole 11. With such arrangement, when the movable nut 3 and the connecting bolt are locked, no matter where the movable nut 3 is adjusted, it can be ensured that the movable nut 3 is in contact with the base plate 1, avoiding the situation where the movable nut 3 is completely suspended in the adjustment airtightness, that is, avoiding the locking pressure on the anti-rotation arm 32.

[0052] Furthermore, in this embodiment, the limit foot 21 corresponds to the anti-rotation arm 32 in one-to-one correspondence to form an anti-rotation limit group, and the anti-rotation limit group is provided in four groups, and the four anti-rotation arms 32 are formed at the four diagonal positions of the movable nut 3. By providing four groups of the anti-rotation limit groups, the movable nut 3 can be flexibly adjusted in four directions on the base plate 1; at the same time, compared with providing the anti-rotation arm 32 on the side of the movable nut 3, providing the anti-rotation arm 32 at the four diagonal positions of the movable nut 3 can reduce the size of the movable nut 3 to the greatest extent.

[0053] It should be noted that the method of limiting by the four limiting feet 21 in the above embodiment is only a specific embodiment of the present invention, and other methods based on the principle of the present invention, which are expanded to three-foot limiting, five-foot limiting, six-foot limiting and other multi-foot limiting methods, all belong to the patent scope of the present invention.

[0054] Since the length of the locking screw that cooperates with the movable nut 3 is generally redundant, it may press against the limit plate 2 and fail to completely lock the movable nut 3. Figure 5, in this embodiment, a relief square hole 22 is formed on the limiting plate 2 corresponding to the adjustment square hole 11. The relief square hole 22 can allow the locking screw to pass through to ensure the complete movement of the movable nut 3. It can be understood that the size of the relief square hole 22 should be larger than that of the adjustment square hole 11.

[0055] Furthermore, in this embodiment, the limiting plate 2 is square based on the relief square hole 22. With such a setting, while ensuring that the limiting plate 2 has a limiting effect on the movable nut 3, the production materials can be minimized, reducing the overall weight of the two-way adjustable movable nut structure 100.

[0056] Even further, in this embodiment, the limiting feet 21 and the anti-rotation arms 32 form anti-rotation limiting groups in one-to-one correspondence, and four anti-rotation limiting groups are provided. The four limiting feet 21 are formed in the middle of the side end of the limiting plate 2. By arranging the four limiting feet 21 at the middle position of the side end of the limiting plate 2, the distribution of the four limiting feet 21 can be made more compact, that is, the protruding length of the anti-rotation arms 32 is reduced, making the overall structure of the two-way adjustable movable nut structure 100 more compact and smaller in size.

[0057] Please refer to Figure 10 , in this embodiment, the limiting feet 21 and the anti-rotation arms 32 form anti-rotation limiting groups in one-to-one correspondence, and four anti-rotation limiting groups are provided. The limiting plate 2 and the movable nut 3 are square corresponding to the adjustment square hole 11 respectively. The four anti-rotation arms 32 are formed at the four diagonal corners of the movable nut 3, and the four limiting feet 21 are formed in the middle of the side end of the limiting plate 2;

[0058] The outer spacing between two relatively arranged limiting feet 21 is n, the two-way adjustment amount of the movable nut 3 is r, the spacing between the distal ends of two relatively arranged anti-rotation arms 32 is b, the width of the limiting foot 21 is f, the width of the movable nut 3 is a, the width of the anti-rotation arm 32 is c, and the thickness of the limiting foot 21 is s, where:

[0059] n = 4r + f + 2c / sin45° + 2s, and / or, a ≤ n - 2r - 2s, and / or, b > n - 2s.

[0060] The above three juxtaposed technical features "n = 4r + f + 2c / sin45° + 2s", "a ≤ n - 2r - 2s" and "b > n - 2s" can be set selectively, set in pairs or set simultaneously. Obviously, when set simultaneously, it can better reflect the mutual limiting relationship between the parameters n, r, b, f, a, c and s to accurately determine the specific dimensions of the two-way adjustable movable nut structure 100;

[0061] Take r = 5 mm, f = 2 mm, s = 1 mm, c = 2 mm, at this time, n = 26.83 mm is obtained; a ≤ 14.83 mm; b > 24.83 mm.

[0062] Please refer to Figure 3 , the one-way adjustment amount of the movable nut plate 2' is r', the diagonal length of the movable nut plate 2' is b, the one-sided length of the movable nut plate 2' is a', and the one-sided length of the limit seat 3' is n', where: n' = a' + 2r' + 2s'; 2a' / sin45 > a' + 2r'; b' > n' - 2s'; b' = a' / sin45.

[0063] According to the control variable method, take r' = 5 mm, s' = 1 mm, at this time, n' ≥ 36.15 mm is obtained.

[0064] Comparing the above conversion results, when the one-way adjustment amounts of the movable nut 3 and the movable nut plate 2' are the same, the outer distance n between the two limit feet 21 of the two-way adjustable movable nut structure 100 provided by the embodiment of the present invention is about 26% smaller than the length n' of the limit seat 3' in the existing movable nut structure 100'.

[0065] Combined with the attached Figure 6 and 7 , the corresponding relationship of the key parameters of the two-way adjustable movable nut structure 100 is shown in the following table:

[0066]

[0067]

[0068] Compared with the existing movable nut structure 100', the two-way adjustable movable nut structure 100 provided by the embodiment of the present invention reduces the size of the movable nut 3, the overall width is reduced by 10% - 40%, and the weight is reduced by more than 50% - 70%.

[0069] There are various forms of forming the limit feet 21 and the limit plate 2. Specifically, in this embodiment, the limit feet 21 and the limit plate 2 are integrally formed. They are integrally formed by stamping and then connected to the substrate 1 by welding. The overall structure is stable and the production process is simple.

[0070] Due to the problem of out-of-tolerance in the fit clearance and surface difference between the boarding pedal guard plate and the front bumper body, based on this, the present invention also provides a boarding pedal assembly. The boarding pedal assembly includes the bidirectional adjustment movable nut structure 100 in the above solution. It should be noted that the structure of the bidirectional adjustment movable nut structure 100 in the boarding pedal assembly can refer to the embodiment of the bidirectional adjustment movable nut structure 100, which will not be elaborated here; since the above bidirectional adjustment movable nut structure 100 is used in the boarding pedal assembly provided by the present invention, therefore, the embodiments of the boarding pedal assembly provided by the present invention include all the technical solutions of all the embodiments of the above bidirectional adjustment movable nut structure 100, and the achieved technical effects are also exactly the same, which will not be elaborated here. By using the bidirectional adjustment movable nut structure 100, the integrated design of the boarding pedal guard plate and the front bumper body is realized. The fit clearance is increased from 35±10mm to 10±2mm, and the surface difference is increased from 6±10mm to 0±2mm, improving the overall vehicle sensory quality; at the same time, the problem that the bolts and nuts of the boarding pedal need to be blindly installed while squatting is also solved, eliminating difficult operations and improving the assembly efficiency.

[0071] Specifically, in this embodiment, the boarding pedal assembly further includes a bracket body, a boarding pedal and a countersunk head screw. The bracket body includes the substrate 1; the boarding pedal is formed with a connection hole corresponding to the adjustment square hole 11; the locking screw passes through the connection hole and the adjustment square hole 11 to be connected to the threaded hole 31 of the movable nut 3. By adjusting the movable nut 3 to the required position and locking it, the position of the boarding pedal is adjusted, that is, the position of the boarding pedal guard plate integrally connected to the boarding pedal is adjusted to correspondingly reduce the surface difference clearance from the front bumper body.

[0072] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A two-way adjustable movable nut structure, It is characterized in that include: A base plate is formed with an adjustment square hole; a limit plate, arranged opposite to the base plate, the limit plate being provided with at least three limit feet connected to the base plate, and the at least three limit feet being arranged on the peripheral side of the adjustment square hole, a clearance gap being formed between two adjacent limit feet, and an adjustment cavity being formed between the limit feet, the limit plate and the base plate; and, A movable nut is movably arranged in the adjustment cavity along the extension direction of the limit plate, the threaded hole of the movable nut is arranged corresponding to the adjustment square hole, at least three anti-rotation arms are formed on the circumference of the movable nut, and the at least three anti-rotation arms extend out of the corresponding clearance gaps respectively; Wherein, in the process of screwing the movable nut clockwise or counterclockwise, at least one of the anti-rotation arms can abut against the corresponding limit foot.

2. The two-way adjustable movable nut structure according to claim 1, It is characterized in that The movable nut is arranged in a square shape corresponding to the adjusting square hole, and the projection of the movable nut in the thickness direction thereof can cover the adjusting square hole.

3. The two-way adjustable movable nut structure as claimed in claim 2, It is characterized in that The limiting feet and the anti-rotation arms correspond one-to-one to form an anti-rotation limiting group. Four groups of the anti-rotation limiting groups are provided, and four anti-rotation arms are formed at four diagonal positions of the movable nut.

4. The two-way adjustable movable nut structure according to claim 1, It is characterized in that The limiting plate is provided with a yielding square hole corresponding to the adjusting square hole.

5. The two-way adjustable movable nut structure according to claim 4, It is characterized in that The limiting plate is arranged in a square shape based on the square hole.

6. The two-way adjustable movable nut structure according to claim 5, It is characterized in that The limiting feet and the anti-rotation arms correspond one to one to form an anti-rotation limiting group, and four groups of the anti-rotation limiting groups are arranged. The four limiting feet are formed at the middle part of the side end of the limiting plate.

7. The two-way adjustable movable nut structure according to claim 1, It is characterized in that The limit feet and the anti-rotation arms correspond to each other one by one to form an anti-rotation limit group, and four groups of the anti-rotation limit groups are provided. The limit plate and the movable nut are respectively provided in a square shape corresponding to the adjustment square hole, and the four anti-rotation arms are formed at the four diagonal positions of the movable nut, and the four limit feet are formed at the middle part of the side end of the limit plate; The outer distance between the two relatively arranged limit feet is n, the unidirectional linear adjustment amount of the movable nut is r, the distance between the distal ends of the two relatively arranged stop arms is b, the width of the limit feet is f, the width of the movable nut is a, the width of the stop arm is c, and the thickness of the limit feet is s, wherein: n>4r+f+2c / sin45°+2s, and / or, a≤n-2r-2s, and / or, b>n-2s.

8. The two-way adjustable movable nut structure according to claim 1, It is characterized in that The limiting foot and the limiting plate are integrally formed.

9. A boarding pedal assembly, It is characterized in that It includes a bi-directional adjusting movable nut structure as described in any one of claims 1 to 8.

10. The vehicle boarding pedal assembly as claimed in claim 9, characterized in that the vehicle boarding pedal assembly includes: a bracket body, the bracket body including the substrate; a vehicle boarding pedal formed with a connection hole corresponding to the adjustment square hole; and, a countersunk head screw passing through the connection hole and the adjustment square hole and connecting to the threaded hole of the movable nut.

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