Tolerance adjuster

Abstract

The application discloses a tolerance adjuster which comprises an outer sleeve, an inner sleeve and an elastic fixing part. A limiting part protruding from the outer sleeve abuts against the periphery of a through hole of a first to-be-connected part. The inner sleeve is in an initial position. When a bolt is inserted into a mounting space formed in the elastic fixing part in the inner sleeve, the bolt drives the inner sleeve to slide downward relative to the outer sleeve through the elastic fixing part, so that the inner sleeve slides from the initial position to a middle position. After the lower end of the inner sleeve abuts against the periphery of a through hole of a second to-be-connected part below and reaches the middle position, the bolt is rotated, and the bolt drives the elastic fixing part and the inner sleeve to rotate to a working position. The bolt is directly pressed downward, so that the inner sleeve can quickly slide to a proper middle position to reach a required supporting length. Finally, assembly can be realized by only rotating and screwing the bolt with a welding nut through a tightening tool. The problem that the existing tolerance adjuster has a long thread rotating time and low installation efficiency when the installation space is large is solved.

Description

Technical Field

[0001] This invention relates to the field of automobile manufacturing and assembly technology, and more particularly to tolerance adjusters. Background Technology

[0002] In the early design phase, automotive stylists, in their pursuit of an attractive appearance, may overlook the feasibility of assembly processes for certain components. This can lead to lower engineering feasibility in the final product, failing to meet the stylist's design intent. For example, roof racks and headlights are exterior parts of a car, requiring precise dimensional adjustments for installation. However, the installation space and environmental conditions for these components are extremely demanding. To address these issues, tolerance adjusters are often used to ensure reliable assembly, consistency, and a good fit with related parts.

[0003] Existing tolerance adjusters generally consist of an outer sleeve, an inner sleeve, and related auxiliary parts. The outer sleeve and inner sleeve are engaged by external and internal threads. The working principle is as follows: the outer sleeve is limited to prevent rotation, while the inner sleeve is rotated by a bolt or other tool. The inner sleeve stops rotating when it reaches another mounting surface, and is then connected to the nut on the mounting surface by a bolt. This achieves the function of filling the gap between the two mounting surfaces and ensuring an effective connection. However, because the axial elongation of the outer and inner sleeves is achieved through threaded rotation, the threaded rotation time is excessively long in situations with large installation spaces, reducing installation efficiency and complicating operation. Summary of the Invention

[0004] The main objective of this invention is to propose a tolerance adjuster that addresses the problem of excessive thread rotation time and low installation efficiency in existing tolerance adjusters when the installation space is large.

[0005] To achieve the above objectives, the present invention proposes a tolerance adjuster, the tolerance adjuster comprising:

[0006] An outer sleeve extends vertically, and a limiting part protrudes from the upper end of the outer peripheral wall of the outer sleeve;

[0007] An inner sleeve, which is hollow and fitted inside an outer sleeve, has a protruding abutment portion on its outer peripheral wall. The inner sleeve is movably disposed relative to the outer sleeve, having an initial position, an intermediate position, and a working position. The inner sleeve is slidably disposed relative to the outer sleeve, allowing it to slide from the initial position to the intermediate position during its sliding stroke. The inner sleeve is rotatably disposed relative to the outer sleeve, allowing it to rotate from the intermediate position to the working position during its rotational stroke. In the working position, the inner sleeve at least partially extends out of the outer sleeve.

[0008] An elastic fastener is fitted inside the inner sleeve. The elastic fastener has an installation space for bolts to pass through. When the bolt moves through the installation space, the elastic fastener drives the inner sleeve to move synchronously.

[0009] A limiting structure is provided between the inner peripheral wall of the outer sleeve and the outer peripheral wall of the inner sleeve. The limiting structure is used to restrict the axial movement of the inner sleeve relative to the outer sleeve when the inner sleeve is in the working position.

[0010] Optionally, the elastic fastener has an annular main body portion and a lifting portion extending downward from the annular main body portion;

[0011] The inner sleeve has an annular groove recessed in its inner peripheral wall. The annular groove has two annular sidewalls arranged opposite each other in a vertically upward direction. The annular main body is movably fitted into the annular groove along the axial direction of the inner sleeve, so as to have a first position and a second position. In the first position, the annular main body abuts against the lower annular sidewall, and the lifting part is at least partially exposed outside the inner sleeve. In the second position, the annular main body abuts against the upper annular sidewall, and the lifting part is located inside the inner sleeve.

[0012] Optionally, the annular main body includes two annular rings spaced apart in the vertical direction and a plurality of connecting ribs. The two ends of each connecting rib are respectively connected to the two annular rings, and the middle of each connecting rib arches inward in a direction away from the two annular rings. The plurality of connecting ribs are arranged circumferentially along the two annular rings to form the installation space between the plurality of connecting ribs.

[0013] Optionally, the annular main body is provided with a through groove in the vertical direction, so that the annular main body has two ends in the circumferential direction, and the two ends can be arranged to be close to each other and far apart.

[0014] Optionally, the limiting structure includes a first protrusion protruding from the inner peripheral wall of the outer sleeve and a second protrusion protruding from the outer peripheral wall of the inner sleeve. The first protrusion and the second protrusion are arranged opposite to each other. One of their surfaces is recessed with a plurality of limiting grooves, and the other surface is provided with a limiting protrusion that can cooperate with each of the limiting grooves. Each of the limiting grooves extends circumferentially along the outer sleeve, and the plurality of limiting grooves are spaced apart in the axial direction of the outer sleeve.

[0015] Optionally, the first protrusion is provided in multiple ways, and the second protrusion is provided in multiple ways;

[0016] A plurality of first protrusions are spaced apart circumferentially along the outer sleeve, and a plurality of second protrusions are spaced apart circumferentially along the outer sleeve, with a mounting groove formed between each pair of adjacent first protrusions for inserting a second protrusion.

[0017] Optionally, the surface of the first protrusion is provided with an internal thread, the surface of the second protrusion is provided with an external thread, the plurality of limiting grooves include the internal thread, and the limiting protrusion includes the external thread.

[0018] Optionally, the abutting portion is located at one end of the second protrusion in the circumferential direction of the inner sleeve.

[0019] Optionally, the limiting part includes an annular protrusion protruding from the outer peripheral wall of the outer sleeve, and a positioning protrusion protruding from the lower side of the annular protrusion.

[0020] Optionally, the lower end of the inner sleeve has an annular folded edge extending radially outward therefrom.

[0021] In the technical solution provided by this invention, a limiting part protrudes from the upper end of the outer peripheral wall of the outer sleeve. When the tolerance adjuster is inserted from top to bottom into the through hole of the first component to be connected located above, the limiting part abuts against the periphery of the through hole of the first component to be connected, so that the tolerance adjuster can be positioned in its axial and circumferential directions. At this time, the inner sleeve is in the initial position. When the bolt is inserted into the installation space formed by the elastic fixing member located inside the inner sleeve, the bolt drives the inner sleeve to slide downward relative to the outer sleeve through the elastic fixing member, so that the inner sleeve slides from the initial position toward the intermediate position. When the lower end of the inner sleeve abuts against the periphery of the through hole of the second component to be connected located below, the inner sleeve can no longer slide. At this time, the inner sleeve reaches the intermediate position. Then, the bolt is rotated, and the bolt drives the elastic fixing member to rotate. The elastic fixing member drives the inner sleeve to rotate to the working position. The limiting structure restricts the axial movement of the inner sleeve relative to the outer sleeve. When the bolt moves downward, the inner sleeve is fixed in axial position relative to the outer sleeve, so that the hollow area between the first and second parts to be connected is supported by the inner sleeve. When the bolt continues to move downward, the bolt slides relative to the elastic fixing member, extends out of the lower end of the inner sleeve, passes through the through hole of the second part to be connected, and is screwed and fixed to the welding nut fixed on the side of the second part to be connected away from the first part to be connected. This allows the first and second parts to be connected to maintain their original posture and shape after being connected and fixed. By pressing the bolt directly down, the inner sleeve can be quickly slid to the appropriate intermediate position, and then rotated to fix the relative position between the inner sleeve and the outer sleeve. Finally, when tightening the bolt, only a small amount of rotation is required by the tightening tool to achieve assembly. The assembly is fast and efficient, without the need to adjust the length of the inner sleeve relative to the outer sleeve by relative rotation throughout the entire process. This solves the problem of excessive thread rotation time and low installation efficiency of existing tolerance adjusters when the installation space is large. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the assembly of the tolerance adjuster, the first component to be connected, and the second component to be connected provided by the present invention.

[0024] Figure 2 for Figure 1 A cross-sectional schematic diagram;

[0025] Figure 3 A cross-sectional schematic diagram of an embodiment of the tolerance adjuster provided by the present invention;

[0026] Figure 4 for Figure 3 A three-dimensional diagram of the outer sleeve;

[0027] Figure 5 for Figure 4 A diagram showing the view from below;

[0028] Figure 6 for Figure 3 A three-dimensional schematic diagram of the inner sleeve;

[0029] Figure 7 for Figure 6 Cross-sectional schematic diagram;

[0030] Figure 8 for Figure 3 A three-dimensional schematic diagram of the elastic fastener in the diagram;

[0031] Figure 9 for Figure 3 A schematic diagram of the internal structure of the tolerance adjuster in the diagram.

[0032] Explanation of icon numbers:

[0033] label name label name 100 Tolerance adjuster 221 Limiting protrusion 1 outerwear 222 Circular folded edge 11 Limiting part 3 Flexible fasteners 111 Annular protrusion 31 Circular main body 112 Positioning protrusion 311 Circular ring 12 first convex part 312 Connecting ribs 12a Limiting groove 31a Through slot 1a Mounting slot 32 Lifting section 2 Inner sleeve 200 bolt 21 Butt part 300 First component to be connected 2a Annular groove 400 Second component to be connected 211 Annular sidewall 500 Weld nuts 22 second convex portion

[0034] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0036] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0037] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0038] Existing tolerance adjusters generally consist of an outer sleeve, an inner sleeve, and related auxiliary parts. The outer sleeve and inner sleeve are engaged by external and internal threads. The working principle is as follows: the outer sleeve is limited to prevent rotation, while the inner sleeve is rotated by a bolt or other tool. The inner sleeve stops rotating when it reaches another mounting surface, and is then connected to the nut on the mounting surface by a bolt. This achieves the function of filling the gap between the two mounting surfaces and ensuring an effective connection. However, because the axial elongation of the outer and inner sleeves is achieved through threaded rotation, the threaded rotation time is excessively long in situations with large installation spaces, reducing installation efficiency and complicating operation.

[0039] To address the aforementioned problems, this invention provides a tolerance adjuster. Figure 1 This is a schematic diagram of the assembly of the tolerance adjuster, the first component to be connected, and the second component to be connected provided by the present invention. Figure 2 for Figure 1 A cross-sectional schematic diagram; Figure 3 A cross-sectional schematic diagram of an embodiment of the tolerance adjuster provided by the present invention; Figure 4 for Figure 3 A three-dimensional diagram of the outer sleeve; Figure 5 for Figure 4 A diagram showing the view from below; Figure 6 for Figure 3 A three-dimensional schematic diagram of the inner sleeve; Figure 7 for Figure 6 Cross-sectional schematic diagram; Figure 8 for Figure 3 A three-dimensional schematic diagram of the elastic fastener in the diagram; Figure 9 for Figure 3 A schematic diagram of the internal structure of the tolerance adjuster in the diagram.

[0040] Please see Figures 1 to 3The tolerance adjuster 100 includes an outer sleeve 1, an inner sleeve 2, and an elastic fixing member 3. The outer sleeve 1 extends vertically, and a limiting part 11 protrudes from the upper end of its outer peripheral wall. The inner sleeve 2 is hollow and fitted inside the outer sleeve 1. An abutting part 21 protrudes from the outer peripheral wall of the inner sleeve 2. The inner sleeve 2 is movably disposed relative to the outer sleeve 1, having an initial position, an intermediate position, and a working position. The inner sleeve 2 is slidably disposed relative to the outer sleeve 1, so that the inner sleeve 2 can slide from the initial position to the intermediate position during its sliding stroke. The inner sleeve 2 is rotatably disposed relative to the outer sleeve 1, so that the... The inner sleeve 2 can rotate from the intermediate position to the working position during its rotational stroke. In the working position, the inner sleeve 2 extends at least partially out of the outer sleeve 1. The elastic fastener 3 is sleeved inside the inner sleeve 2 and has an installation space for the bolt 200 to pass through. The elastic fastener 3 is used to drive the inner sleeve 2 to move synchronously when the bolt 200 moves through the installation space. A limiting structure is provided between the inner peripheral wall of the outer sleeve 1 and the outer peripheral wall of the inner sleeve 2. The limiting structure is used to restrict the axial movement of the inner sleeve 2 relative to the outer sleeve 1 when the inner sleeve 2 is in the working position.

[0041] In the technical solution provided by this invention, a limiting part 11 protrudes from the upper end of the outer peripheral wall of the outer sleeve 1. When the tolerance adjuster 100 is inserted from top to bottom into the through hole of the first component to be connected 300 located above, the limiting part 11 abuts against the periphery of the through hole of the first component to be connected 300, so that the tolerance adjuster 100 can be positioned in its axial and circumferential directions. At this time, the inner sleeve 2 is in the initial position. When the bolt 200 is inserted into the installation space formed by the elastic fixing member 3 located in the inner sleeve 2, the bolt 200 is fixed by the elastic fixing member 3. The inner sleeve 2 slides downward relative to the outer sleeve 1, causing it to slide from the initial position toward the intermediate position. When the lower end of the inner sleeve 2 abuts against the periphery of the through hole of the second component 400 located below, the inner sleeve 2 can no longer slide, and it reaches the intermediate position. Then, the bolt 200 is rotated, causing the elastic fixing member 3 to rotate. The elastic fixing member 3 then rotates the inner sleeve 2 to the working position. The limiting structure restricts the axial movement of the inner sleeve 2 relative to the outer sleeve 1. At this time, the inner sleeve 2 is fixed in axial position relative to the outer sleeve 1, so that the hollow area between the first part to be connected 300 and the second part to be connected 400 is supported by the inner sleeve 2. When the bolt 200 continues to move downward, the bolt 200 slides relative to the elastic fixing member 3, extends out of the lower end of the inner sleeve 2, passes through the through hole of the second part to be connected 400, and is screwed and fixed to the welding nut 500 fixed on the side of the second part to be connected 400 away from the first part to be connected 300, so that the first part to be connected 300 and the second part to be connected 400 can maintain their connection after being fixed. Its original posture and shape, by directly pressing down the bolt 200, allows the inner sleeve 2 to quickly slide to the appropriate intermediate position, and then rotates to fix the relative position between the inner sleeve 2 and the outer sleeve 1. Finally, when tightening the bolt 200, only a small rotation stroke is required to complete the assembly. The assembly is fast and efficient, without the need to adjust the length of the inner sleeve 2 relative to the outer sleeve 1 by relative rotation throughout the entire process. This solves the problem of the existing tolerance adjuster 100 having excessively long thread rotation time and low installation efficiency when the installation space is large.

[0042] Specifically, please refer to Figures 7 to 8In this embodiment, the elastic fastener 3 has an annular main body 31 and a lifting part 32 extending downward from the annular main body 31; the inner peripheral wall of the inner sleeve 2 is recessed with an annular groove 2a, the annular groove 2a has two annular sidewalls 211 arranged opposite each other in the vertical direction, the annular main body 31 is movably fitted into the annular groove 2a along the axial direction of the inner sleeve 2 to have a first position and a second position. In the first position, the annular main body 31 abuts against the lower annular sidewall 211, and the lifting part 32 is at least partially exposed outside the inner sleeve 2. In the second position, the annular main body 31 abuts against the upper annular sidewall 211, and the lifting part 32 is located inside the inner sleeve 2. With this configuration, when the bolt 200 is assembled, the elastic fastener 3, after being held by the bolt 200, moves to the first position. At this time, the inner sleeve 2 is in the initial position. When the bolt 200 is subjected to downward pressure and moves towards the middle position, the elastic fastener 3 is subjected to downward force, so that the elastic fastener 3 is always in the first position. Because the bottom of the lifting part 32 is exposed outside the inner sleeve 2, when the inner sleeve 2 is about to reach the middle position, the lifting part 32 abuts against the upper end face of the second part to be connected 400. When the bolt 200 is pressed down further, the inner sleeve 2... The sleeve 2 is subjected to a downward force and reaches the middle position, abutting against the upper end face of the second component to be connected 400. The lifting part 32 does not move due to the restriction of the second component to be connected 400, but it will move upward relative to the inner sleeve 2, so that the upper end of the annular main body 31 abuts against the annular side wall 211 located above. When the bolt 200 rotates, because there is friction between the outer peripheral wall and the upper end wall of the annular main body 31 and the inner wall of the inner sleeve 2, the annular main body 31 and the lifting part 32 will rotate synchronously, thereby realizing the switch to the working position.

[0043] It is understood that when the inner sleeve 2 slides toward the middle position, and the annular main body 31 is in the first position, the length of the lifting part 32 exposed outside the inner sleeve 2 is set to be slightly greater than the distance between the upper end face of the annular main body 31 and the annular sidewall 211 located above. In this way, when the annular main body 31 moves to the second position, and is subjected to the downward pressure of the bolt 200, the lifting part 32 can and always abut against the upper end face of the second part to be connected 400, so that the upper end face of the annular main body 31 can abut against the annular sidewall 211 located above, so as to provide sufficient friction.

[0044] Specifically, please refer to Figure 8In this embodiment, the annular main body 31 includes two annular rings 311 spaced apart in the vertical direction and a plurality of connecting ribs 312. Each connecting rib 312 has two ends connected to the two annular rings 311, and the middle portion of each connecting rib 312 arches inward toward the direction away from the two annular rings 311. The plurality of connecting ribs 312 are arranged circumferentially around the two annular rings 311 to form the installation space between the plurality of connecting ribs 312. It should be noted that the two annular rings 311 and the plurality of connecting ribs 312 are made of an elastic material, such as plastic, rubber, etc. It should also be noted that the size of the installation space formed between the multiple connecting ribs 312 is set to be slightly smaller than the diameter of the bolt 200. When the bolt 200 passes through the installation space, the multiple connecting ribs 312 are compressed, which can produce a certain elastic deformation. At the same time, the multiple connecting ribs 312 will also act on the bolt 200, so that the outer peripheral wall of the bolt 200 can generate sufficient friction between the multiple connecting ribs 312, thereby driving the inner sleeve 2 to move to the middle position through the elastic fastener 3. When the bolt 200 is pressed down further, the bolt 200 overcomes the friction of the multiple connecting ribs 312 and slides downward to be screwed with the welding nut 500 on the second part to be connected 400.

[0045] Furthermore, in this embodiment, the annular main body 31 is provided with a through groove 31a in the vertical direction, so that the annular main body 31 has two ends in the circumferential direction, and the two ends can be arranged to be close to each other and far apart. With this arrangement, the diameter of the annular main body 31 can be set to be slightly larger than the inner diameter of the inner sleeve 2, matching the diameter of the annular groove 2a. When the annular main body 31 is assembled into the annular groove 2a, the annular main body 31 deforms, and the two ends of the annular main body 31 in the circumferential direction can be close to each other to adapt to the inner diameter of the inner sleeve 2. When assembled into the annular groove 2a, the annular main body 31 returns to its deformed state and can be smoothly fitted into the annular groove 2a.

[0046] Specifically, please refer to Figures 4 to 7 as well as Figure 9 In this embodiment, the limiting structure includes a first protrusion 12 protruding from the inner peripheral wall of the outer sleeve 1 and a second protrusion 22 protruding from the outer peripheral wall of the inner sleeve 2. The first protrusion 12 and the second protrusion 22 are arranged opposite to each other. One of their surfaces is recessed with a plurality of limiting grooves 12a, and the other is provided with a limiting protrusion 221 that can cooperate with each of the limiting grooves 12a. Each of the limiting grooves 12a extends along the circumference of the outer sleeve 1, and the plurality of limiting grooves 12a are spaced apart in the axial direction of the outer sleeve 1.

[0047] It should be noted that, due to the difference in the distance between the first part to be connected 300 and the second part to be connected 400 when assembling different parts, the working length of the tolerance adjuster 100 needs to be adjusted according to the actual situation. This also means that the sliding stroke of the inner sleeve 2 relative to the outer sleeve 1 is also different. Therefore, in order to facilitate the positioning and engagement of the inner sleeve 2 at different working positions, when the inner sleeve 2 reaches the middle position, the limiting protrusion 221 can be aligned circumferentially with the corresponding limiting groove 12a. When rotating the bolt 200, the limiting protrusion 221 can engage with the corresponding limiting groove 12a, thereby realizing the adjustment of the different working lengths of the tolerance adjuster 100.

[0048] Understandably, in another embodiment, one of the two opposing surfaces of the first protrusion 12 and the second protrusion 22 is recessed with a plurality of limiting protrusions 221, while the other surface is provided with limiting grooves 12a that can cooperate with each of the limiting protrusions 221. Each of the limiting protrusions 221 extends circumferentially along the outer sleeve 1, and the plurality of limiting protrusions 221 are spaced apart axially along the outer sleeve 1. In yet another embodiment, one of the two opposing surfaces of the first protrusion 12 and the second protrusion 22 is recessed with a plurality of limiting protrusions 221, while the other surface is provided with a plurality of limiting grooves 12a that can respectively cooperate with the plurality of limiting protrusions 221. Each of the limiting protrusions 221 extends circumferentially along the outer sleeve 1, and the plurality of limiting protrusions 221 are spaced apart axially along the outer sleeve 1. Each of the limiting grooves 12a extends circumferentially along the outer sleeve 1, and the plurality of limiting grooves 12a are spaced apart axially along the inner sleeve 2. Of course, the limiting structure is not limited to the examples above. Those skilled in the art may make other changes based on the technical essence of the embodiments in this specification. However, as long as the functions and effects achieved are the same as or similar to those in the embodiments of this specification, they should be covered within the protection scope of the embodiments of this specification.

[0049] In this embodiment, please refer to Figure 5The inner sleeve 2 has multiple first protrusions 12 and multiple second protrusions 22. The multiple first protrusions 12 are spaced apart circumferentially along the outer sleeve 1, and the multiple second protrusions 22 are spaced apart circumferentially along the outer sleeve 1. An installation groove 1a is formed between each pair of adjacent first protrusions 12 for inserting a second protrusion 22. With this configuration, when the inner sleeve 2 is initially installed inside the outer sleeve 1, the abutting portion 21 of the inner sleeve 2 abuts against the inner wall of the outer sleeve 1. The first protrusions 12 and second protrusions 22 are staggered circumferentially along the outer sleeve 1, thus preventing interference between the first protrusions 12 and second protrusions 22 when the inner sleeve 2 slides relative to the outer sleeve 1. Furthermore, multiple first protrusions 12 and second protrusions 22 are provided. The limiting grooves and limiting protrusions on each first protrusion 12 and each second protrusion 22 can limit the inner sleeve 2 at multiple positions in the circumferential direction to prevent the inner sleeve 2 from tilting relative to the outer sleeve 1, thereby ensuring the stability of the inner sleeve 2.

[0050] Specifically, please refer to Figures 4 to 7 In this embodiment, the surface of the first protrusion 12 is provided with an internal thread, and the surface of the second protrusion 22 is provided with an external thread. The plurality of limiting grooves 12a include the internal thread, and the limiting protrusion 221 includes the external thread. It is understood that the larger the pitch of the internal and external threads, the fewer length specifications the tolerance adjuster 100 can adjust; conversely, the smaller the pitch of the internal and external threads, the more length specifications the tolerance adjuster 100 can adjust. Thus, the pitch of the internal thread can be adjusted to a suitable size to ensure the assembly accuracy of the tolerance adjuster 100. Furthermore, by providing internal and external threads, forming and processing are more convenient.

[0051] Furthermore, to prevent the limiting protrusion 221 from rotating along the extending direction of the limiting groove 12a, and to position the inner sleeve 2 in its circumferential direction, in this embodiment, the abutting portion 21 is located at one end of the second protrusion 22 in the circumferential direction of the inner sleeve 2. It should be noted that, to ensure a perfect fit between the inner sleeve 2 and the outer sleeve 1, the abutting portion is designed to protrude from the second protrusion 22, and the inner sleeve 2 can only abut against the inner wall of the outer sleeve 1 through the abutting portion. When the inner sleeve 2 rotates to the working position, the internal thread and the external thread engage with each other. When the internal thread and the external thread are fully aligned, the abutting portion 21 located beside the second protrusion 22 abuts against the side of the first protrusion 12, preventing the inner sleeve 2 from continuing to rotate circumferentially.

[0052] In this embodiment, please refer to Figure 3 and Figure 5 The limiting part 11 includes an annular protrusion 111 protruding from the outer peripheral wall of the outer sleeve 1, and a positioning protrusion 112 protruding from the lower side of the annular protrusion 111. Thus, the limiting part 11 passes through a through hole in the first component to be connected 300. When the bolt 200 rotates, the positioning protrusion 112 restricts the circumferential rotation of the outer sleeve 1, facilitating the fixed assembly of the inner sleeve 2 and the outer sleeve 1.

[0053] In this embodiment, please refer to Figures 6 to 7 The lower end of the inner sleeve 2 has an annular folded edge 222 extending radially outward. This design results in a larger area of ​​the lower end face of the inner sleeve 2, which prevents deformation of the second part 400 when the inner sleeve 2 abuts against it, and also provides a larger contact area and greater stability.

[0054] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A tolerance adjuster, characterized in that, include: An outer sleeve extends vertically, and a limiting part protrudes from the upper end of the outer peripheral wall of the outer sleeve; An inner sleeve, which is hollow and fitted inside an outer sleeve, has a protruding abutment portion on its outer peripheral wall. The inner sleeve is movably disposed relative to the outer sleeve, having an initial position, an intermediate position, and a working position. The inner sleeve is slidably disposed relative to the outer sleeve, allowing it to slide from the initial position to the intermediate position during its sliding stroke. The inner sleeve is rotatably disposed relative to the outer sleeve, allowing it to rotate from the intermediate position to the working position during its rotational stroke. In the working position, the inner sleeve at least partially extends out of the outer sleeve. An elastic fastener is fitted inside the inner sleeve. The elastic fastener has an installation space for bolts to pass through. When the bolt moves through the installation space, the elastic fastener drives the inner sleeve to move synchronously. A limiting structure is provided between the inner peripheral wall of the outer sleeve and the outer peripheral wall of the inner sleeve. The limiting structure is used to restrict the axial movement of the inner sleeve relative to the outer sleeve when the inner sleeve is in the working position.

2. The tolerance adjuster as described in claim 1, characterized in that, The elastic fastener has an annular main body and a lifting part extending downward from the annular main body; The inner sleeve has an annular groove recessed in its inner peripheral wall. The annular groove has two annular sidewalls arranged opposite each other in a vertically upward direction. The annular main body is movably fitted into the annular groove along the axial direction of the inner sleeve, so as to have a first position and a second position. In the first position, the annular main body abuts against the lower annular sidewall, and the lifting part is at least partially exposed outside the inner sleeve. In the second position, the annular main body abuts against the upper annular sidewall, and the lifting part is located inside the inner sleeve.

3. The tolerance adjuster as described in claim 2, characterized in that, The annular main body includes two annular rings spaced apart in the vertical direction and a plurality of connecting ribs. The two ends of each connecting rib are respectively connected to the two annular rings, and the middle of each connecting rib arches inward in a direction away from the two annular rings. The plurality of connecting ribs are arranged circumferentially along the two annular rings to form the installation space between the plurality of connecting ribs.

4. The tolerance adjuster as described in claim 2, characterized in that, The annular main body is provided with a through groove in the vertical direction, so that the annular main body has two ends in the circumferential direction, and the two ends can be arranged to be close to each other and far apart.

5. The tolerance adjuster as described in claim 1, characterized in that, The limiting structure includes a first protrusion protruding from the inner peripheral wall of the outer sleeve and a second protrusion protruding from the outer peripheral wall of the inner sleeve. The first protrusion and the second protrusion are arranged opposite to each other. One of their surfaces is recessed with a plurality of limiting grooves, and the other surface is provided with a limiting protrusion that can cooperate with each of the limiting grooves. Each of the limiting grooves extends circumferentially along the outer sleeve, and the plurality of limiting grooves are spaced apart in the axial direction of the outer sleeve.

6. The tolerance adjuster as described in claim 5, characterized in that, The first protrusion is provided in multiple portions, and the second protrusion is provided in multiple portions; A plurality of first protrusions are spaced apart circumferentially along the outer sleeve, and a plurality of second protrusions are spaced apart circumferentially along the outer sleeve, with a mounting groove formed between each pair of adjacent first protrusions for inserting a second protrusion.

7. The tolerance adjuster as described in claim 5, characterized in that, The surface of the first protrusion is provided with an internal thread, the surface of the second protrusion is provided with an external thread, the plurality of limiting grooves include the internal thread, and the limiting protrusion includes the external thread.

8. The tolerance adjuster as described in claim 5, characterized in that, The abutting portion is located at one end of the second protrusion in the circumferential direction of the inner sleeve.

9. The tolerance adjuster as described in claim 1, characterized in that, The limiting part includes an annular protrusion protruding from the outer peripheral wall of the outer sleeve, and a positioning protrusion protruding from the lower side of the annular protrusion.

10. The tolerance adjuster as described in claim 1, characterized in that, The lower end of the inner sleeve has an annular folded edge extending radially outward.

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