A three-dimensional tolerance adjuster and a method of mounting the same

Abstract

This invention discloses a three-dimensional tolerance adjuster and its installation method. The three-dimensional tolerance adjuster includes a base, a spiral sleeve, a screw, a locking nut, and a nut. The screw has a first external thread, a first limiting protrusion, a second limiting protrusion, and a second external thread sequentially arranged along the axial direction. The first external thread is threadedly connected to the locking nut, and the first limiting protrusion abuts against the locking nut. The distance from the outer wall of the locking nut to its central axis is unequal. The base and the spiral sleeve pass through the screw. The base has elastic claws located around the spiral sleeve. A through hole is formed in the center of the base, and a circumferential limiting groove is formed on the side of the base adjacent to the spiral sleeve. The through hole and the circumferential limiting groove are interconnected. The outer wall of the spiral sleeve has external threads, and a circular hole is formed on the spiral sleeve. The second external thread is threadedly connected to the nut, and the nut abuts against the spiral sleeve. This invention eliminates the need for welding the locking nut to the component.

Description

Technical Field

[0001] This invention relates to the field of fastening devices, and more specifically to tolerance adjusters and their installation methods. Background Technology

[0002] When assembling two or more components together, certain tolerances are inevitable. Firstly, individual components have inherent dimensional tolerances during production; that is, due to factors such as machining and measurement during the manufacturing process, the final dimensions will always have some error. Secondly, when two components are fastened together, positional tolerances will also exist. These tolerances persist almost throughout the entire product lifecycle, affecting product quality, processing routes, inspection, manufacturing costs, and the final product assembly.

[0003] Existing tolerance adjusters do not include a locking nut, which needs to be welded to the component (such as a sheet metal part), increasing the component's processing cost. For example, CN211598134U discloses a manual three-way tolerance adjuster. In the field of tolerance adjusters, one design direction is to achieve easy removal of the locking nut. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides a three-dimensional tolerance adjuster and its installation method, which solves at least one of the above-mentioned technical problems.

[0005] The technical solution of the present invention is: a three-dimensional tolerance adjuster, characterized in that it includes a base, a spiral sleeve, a screw, a locking nut, and a nut;

[0006] The screw is provided with a first external thread, a first limiting protrusion, a second limiting protrusion, and a second external thread in sequence along the axial direction;

[0007] The first external threaded portion is threadedly connected to the locking nut, the first limiting protrusion is used to abut against the locking nut, and the distance from the outer wall of the locking nut to the central axis of the locking nut is not equal;

[0008] The base and the spiral sleeve are threaded through the screw. The base is provided with an elastic claw, which is located around the spiral sleeve. A through hole is opened in the center of the base for the second limiting protrusion to pass through. A circumferential limiting groove is opened on the side of the base adjacent to the spiral sleeve for limiting the circumferential rotation angle of the second limiting protrusion. The through hole and the circumferential limiting groove are connected and communicated.

[0009] The base is provided with an extension that extends toward the locking nut, and the extension and the elastic claw are located on different sides of the base;

[0010] The outer wall of the spiral sleeve is provided with an external thread, and the spiral sleeve is provided with a circular hole that passes through the first limiting protrusion and the second limiting protrusion. There is an adjustment gap between the inner wall of the circular hole and the outer wall of the screw for X-axis position adjustment and Y-axis position adjustment.

[0011] The second external thread is threadedly connected to the nut, and the nut abuts against the screw sleeve.

[0012] This invention optimizes the structure of the tolerance adjuster, making it easier to assemble the locking nut and the tolerance adjuster without welding them to the component.

[0013] More preferably, the adjustment gap is not less than 2 mm and not more than 3.5 mm.

[0014] The structure of this device enables a large range of size tolerance adjustment.

[0015] More preferably, the nut has a blind hole for threaded connection to the screw, and the axial length of the blind hole is greater than 6mm;

[0016] The axial length of the second external thread is greater than 6 mm.

[0017] A large tolerance adjustment range in the axial direction has been achieved.

[0018] More preferably, four extensions are provided, and the four extensions are arranged at equal angular intervals around the central axis of the perforation.

[0019] The four extensions are provided with two mutually perpendicular limiting surfaces in the radial direction away from the perforation side. The limiting surfaces are used for circumferential anti-rotation limiting of the base.

[0020] More preferably, the outer wall of the locking nut has a square cross-section;

[0021] The cross-section of the outer wall of the first limiting protrusion is square;

[0022] The axial orthographic projection of the first limiting protrusion coincides with the axial orthographic projection of the second limiting protrusion.

[0023] More preferably, four circumferential limiting grooves are provided, and the four circumferential limiting grooves are arranged circumferentially at 90° intervals.

[0024] More preferably, four-thirds of the circumferential area of ​​the outer wall of the second external thread portion is coated with anti-loosening adhesive.

[0025] It can withstand a pressure of 350 bar. It must meet automotive-grade standards. Operating temperature range: -50℃ to 90℃.

[0026] A three-dimensional tolerance adjuster includes an adjuster base for connecting a first component and a second component, characterized in that the adjuster base includes a base, a screw sleeve, a screw rod, a locking nut, and a nut.

[0027] The screw is provided with a first external thread, a first limiting protrusion, a second limiting protrusion, and a second external thread in sequence along the axial direction;

[0028] The first external threaded portion is threadedly connected to the locking nut, the first limiting protrusion is used to abut against the locking nut, and the distance from the outer wall of the locking nut to the central axis of the locking nut is not equal;

[0029] The base and the spiral sleeve are threaded through the screw. The base is provided with an elastic claw, which is located around the spiral sleeve. A through hole is opened in the center of the base for the second limiting protrusion to pass through. A circumferential limiting groove is opened on the side of the base adjacent to the spiral sleeve for limiting the circumferential rotation angle of the second limiting protrusion. The through hole and the circumferential limiting groove are connected and communicated.

[0030] The base is provided with an extension that extends toward the locking nut, and the extension and the elastic claw are located on different sides of the base;

[0031] The outer wall of the spiral sleeve is provided with an external thread, and the spiral sleeve is provided with a circular hole that passes through the first limiting protrusion and the second limiting protrusion. There is an adjustment gap between the inner wall of the circular hole and the outer wall of the screw for X-axis position adjustment and Y-axis position adjustment.

[0032] The second external thread is threadedly connected to the nut, and the nut abuts against the screw sleeve;

[0033] The first component has a limiting hole through which the locking nut passes. The cross-sectional profile of the limiting hole matches the cross-sectional profile of the locking nut. After the locking nut passes through the limiting hole, the extension of the base is inserted into the limiting hole and partially extends out of the first component, thereby limiting the relative positions of the base and the first component in the X and Y directions. The locking nut is further limited to prevent it from coming off by rotating it circumferentially.

[0034] The second component has a slot through which the elastic claw passes, and there are X-axis adjustment gaps and Y-axis adjustment gaps between the slot and the elastic claw;

[0035] The second component has a threaded hole for threaded connection to the threaded sleeve.

[0036] More preferably, the axial length of the extension is greater than the axial length of the limiting hole, and the extension is used to be inserted into the limiting hole.

[0037] More preferably, the four extensions are provided with two mutually perpendicular limiting surfaces radially away from the perforation side, the limiting surfaces being used for circumferential anti-rotation limiting of the base.

[0038] After the extension is inserted into the limiting hole, the locking nut rotates along the first circumferential direction. When the locking nut is rotated into place along the first circumferential direction, the second limiting protrusion rotates and abuts against the circumferential limiting groove. The four corners of the locking nut are embedded between adjacent extensions. The extension is provided with an inner recess that the locking nut avoids when rotating along the first circumferential direction.

[0039] More preferably, the extension is provided with a guide surface for guiding the locking nut to move away from the base when it rotates along the second circumferential direction.

[0040] More preferably, the cross-section of the limiting hole is square, and the cross-section of the outer wall of the locking nut is square;

[0041] The cross-section of the outer wall of the first limiting protrusion is square;

[0042] The axial orthographic projection of the first limiting protrusion coincides with the axial orthographic projection of the second limiting protrusion.

[0043] The installation method of the three-dimensional tolerance adjuster is characterized by including the following steps:

[0044] Step 1: Connect the locking nut to the screw threadedly, with the locking nut abutting against the first limiting protrusion;

[0045] Step 2: Apply anti-loosening adhesive to the second external thread portion;

[0046] Step 3: The base passes through the screw;

[0047] Step four, the threaded sleeve passes through the screw;

[0048] Step 5: The screw is threaded with the nut.

[0049] More preferably, after step five, the elastic claw of the base is engaged with the slot on the second component, at which point the external thread of the threaded sleeve is screwed into the internal thread of the second component;

[0050] The locking nut, screw, and nut work together, and after the locking nut is adjusted in the X and Y directions, it passes through the limiting hole on the first component. At this time, the extension of the base is inserted into the limiting hole and partially extends out of the first component, limiting the relative X and Y positions of the base and the first component.

[0051] The circumferentially rotating locking nut causes the screw and locking nut to rotate synchronously, and the second limiting boss abuts against the circumferential limiting groove;

[0052] Rotate the nut to adjust the gap between the first and second components, thereby achieving Z-dimensional tolerance adjustment.

[0053] More preferably, after the circumferentially rotated locking nut is in place, the four corners of the locking nut are respectively positioned in the gap between adjacent extensions.

[0054] More preferably, the locking nut is rotated in the opposite direction, and the locking nut is guided away from the base during circumferential rotation along the guide surface on the extension. When the axial projection of the locking nut is aligned with the axial projection of the limiting hole, the locking nut and the first component are axially separated, allowing for removal.

[0055] Beneficial effects:

[0056] This invention optimizes the tolerance adjuster, enabling a detachable connection between the locking nut, traditionally welded to the first component, and the first component. This facilitates assembly. After the locking nut passes through the square mounting hole, during circumferential rotation, the second limiting boss of the screw abuts against the circumferential limiting groove and rotates into position, thus fixing the locking nut relative to the first component. The locking nut further secures the first and second components, enabling rapid assembly. Attached Figure Description

[0057] Figure 1 This is a schematic diagram of a specific embodiment 1 of the present invention;

[0058] Figure 2 This is an exploded view of a specific embodiment 1 of the present invention;

[0059] Figure 3 This is a schematic diagram of the positioning base according to a specific embodiment 1 of the present invention;

[0060] Figure 4 This is a structural schematic diagram of the positioning base from another perspective of a specific embodiment 1 of the present invention;

[0061] Figure 5 This is a structural schematic diagram of the positioning base from another perspective of a specific embodiment 1 of the present invention;

[0062] Figure 6 This is a structural schematic diagram of the positioning base from another perspective of a specific embodiment 1 of the present invention;

[0063] Figure 7 This is a schematic diagram of the installation method of the three-dimensional tolerance adjuster in specific embodiment 1 of the present invention;

[0064] Figure 8This is a cross-sectional view of the three-dimensional tolerance adjuster, the first component, and the second component in the connected state of a specific embodiment 1 of the present invention;

[0065] Figure 9 This is a schematic diagram of the locking nut after it is inserted into the first component in a specific embodiment of the present invention;

[0066] Figure 10 This is a schematic diagram of the locking nut after it has been rotated circumferentially into place according to a specific embodiment of the present invention;

[0067] Figure 11 This is a schematic diagram of the screw and base engaging after the locking nut has been rotated circumferentially to its position according to a specific embodiment of the present invention;

[0068] Figure 12 This is a partial structural diagram of the locking nut after it has been rotated into place in a specific embodiment of the present invention.

[0069] In the figure: 1 is the locking nut, 2 is the screw, 3 is the nut, 4 is the base, 5 is the fixing part, 6 is the first component, 7 is the second component, 21 is the first limiting protrusion, 22 is the second limiting protrusion, 41 is the circumferential limiting groove, and 42 is the extension. Detailed Implementation

[0070] See Figures 1 to 12 Specific embodiment 1: A three-dimensional tolerance adjuster includes a base 4, a spiral sleeve 5, a screw 2, a locking nut 1, and a nut 3. The screw 2 has a first external thread, a first limiting protrusion 21, a second limiting protrusion 22, and a second external thread sequentially arranged along the axial direction. The first external thread is threadedly connected to the locking nut 1. The first limiting protrusion 21 abuts against the locking nut 1. The distance from the outer wall of the locking nut 1 to its central axis is unequal. The base 4 and the spiral sleeve 5 pass through the screw 2. The base 4 has elastic claws located around the spiral sleeve 5. A through-hole is formed in the center of the base 4, passing through the second limiting protrusion 22. The base 4 has a circumferential limiting groove 41 on one side adjacent to the screw sleeve 5, which limits the circumferential rotation angle of the second limiting protrusion 22. The through hole is connected to the circumferential limiting groove 41. The base 4 has an extension 42 extending towards the locking nut 1. The extension 42 and the elastic claw are located on different sides of the base 4. The outer wall of the screw sleeve 5 has an external thread. The screw sleeve 5 has a circular hole passing through the first limiting protrusion 21 and the second limiting protrusion 22. There is an adjustment gap between the inner wall of the circular hole and the outer wall of the screw 2 for X-axis and Y-axis position adjustment. The second external thread is threadedly connected to the nut 3, and the nut 3 abuts against the screw sleeve 5. This invention optimizes the structure of the tolerance adjuster, which facilitates the assembly of the locking nut 1 and the tolerance adjuster without welding to the component. One end of the nut has a blind hole for threaded connection to the screw. The other end of the nut has a prism hole.

[0071] The adjustment gap is not less than 2mm and not more than 3.5mm. The structure of this device enables a large dimensional tolerance adjustment range.

[0072] The nut 3 has a blind hole for threaded connection to the screw 2, and the axial length of the blind hole is greater than 6mm; the axial length of the second external thread is also greater than 6mm. This achieves a large tolerance adjustment range in the axial direction.

[0073] There are four extensions 42, which are arranged at equal intervals around the central axis of the perforation. Two mutually perpendicular limiting surfaces are provided on the radial side of the four extensions 42 away from the perforation. The limiting surfaces are used to limit the rotation of the base 4 in the circumferential direction.

[0074] The outer wall of the locking nut 1 has a square cross-section; the outer wall of the first limiting protrusion 21 has a square cross-section; the axial orthographic projection of the first limiting protrusion 21 coincides with the axial orthographic projection of the second limiting protrusion 22. The through hole matches the axial orthographic projection of the first limiting protrusion 21.

[0075] Four circumferential limiting grooves 41 are provided, arranged circumferentially at 90° intervals. The perforation is a square perforation. Each of the four circumferential limiting grooves 41 has a limiting surface for abutting against the second limiting protrusion 22. Connected limiting surfaces are perpendicular to each other. The angle between the limiting surface and the adjacent side of the square perforation is 45°. Two corners of the square perforation face the two positioning claws. The two axial sides of the perforation respectively connect to the first limiting groove and the circumferential limiting groove 41. The first limiting groove is used to avoid the first limiting protrusion 21. The first limiting groove is a circular groove. Four extensions 42 are located on the outer periphery of the four sides of the square perforation.

[0076] The outer four-thirds circumference of the second external thread is coated with anti-loosening adhesive. It can withstand a pressure of 350 bar. It must meet automotive-grade standards. Operating temperature range: -50℃ to 90℃.

[0077] See Figures 1 to 12A three-dimensional tolerance adjuster includes an adjuster base for connecting a first component 6 and a second component 7. The adjuster base includes a base 4, a screw sleeve 5, a screw 2, a locking nut 1, and a nut 3. The screw 2 has a first external thread, a first limiting protrusion 21, a second limiting protrusion 22, and a second external thread sequentially arranged along the axial direction. The first external thread is threaded to the locking nut 1. The first limiting protrusion 21 abuts against the locking nut 1. The distance from the outer wall of the locking nut 1 to its central axis is unequal. The base 4 and the screw sleeve 5 pass through the screw 2. The base 4 has elastic claws located around the screw sleeve 5. A through hole is formed in the center of the base 4, passing through the second limiting protrusion 22. A circumferential limiting groove 41 is formed on the side of the base 4 adjacent to the screw sleeve 5 for limiting the circumferential rotation angle of the second limiting protrusion 22. The through hole aligns with the circumferential limiting groove 41. The base 4 is provided with an extension 42 extending toward the locking nut 1. The extension 42 and the elastic claw are located on different sides of the base 4. The outer wall of the spiral sleeve 5 is provided with an external thread. The spiral sleeve 5 is provided with a circular hole that passes through the first limiting protrusion 21 and the second limiting protrusion 22. There is an adjustment gap between the inner wall of the circular hole and the outer wall of the screw 2 for adjusting the X-axis position and the Y-axis position. The second external thread is threadedly connected to the nut 3, and the nut 3 abuts against the spiral sleeve 5. The first component 6 is provided with a limiting hole that passes through the locking nut 1. The cross-sectional profile of the limiting hole matches the cross-sectional profile of the locking nut 1. After the locking nut 1 passes through the limiting hole, the extension 42 of the base 4 is inserted into the limiting hole and partially extends out of the first component 6, limiting the relative X-axis position and Y-axis position of the base 4 and the first component 6. The locking nut 1 and the first component 6 are limited by the circumferential rotation of the locking nut 1.

[0078] The second component 7 has a slot through which the elastic claw passes, and there are X-axis adjustment gaps and Y-axis adjustment gaps between the slot and the elastic claw; the second component 7 has a threaded hole for threaded connection of the threaded sleeve. The axial length of the extension 42 is greater than the axial length of the limiting hole, and the extension 42 is used to be inserted into the limiting hole.

[0079] Each of the four extensions 42 has two mutually perpendicular limiting surfaces arranged radially away from the perforation side. These limiting surfaces are used for circumferential anti-rotation limiting of the base. The perforation is a square perforation with a square cross-section. The four extensions 42 are located on the outer periphery of the four sides of the perforation.

[0080] After the extension 42 is inserted into the limiting hole of the first component 6, the locking nut 1 rotates along the first circumferential direction. When the locking nut 1 is rotated into position along the first circumferential direction, the second limiting protrusion 22 rotates and abuts against the circumferential limiting groove 41. The four corners of the locking nut 1 are embedded between adjacent extensions 42. The extension 42 is provided with an inner recess that avoids the locking nut 1 when it rotates along the first circumferential direction. The extension 42 is provided with a guide surface for guiding the locking nut 1 to move away from the base 4 when it rotates along the second circumferential direction.

[0081] The cross-section of the limiting hole is square, and the cross-section of the outer wall of the locking nut 1 is square; the cross-section of the outer wall of the first limiting protrusion 21 is square; the axial orthographic projection of the first limiting protrusion 21 coincides with the axial orthographic projection of the second limiting protrusion 22.

[0082] The end of the locking nut 1 furthest from the base 4 is provided with a guide end whose cross-section increases axially from the outside to the inside. This facilitates insertion into the limiting hole.

[0083] See Figure 7 The installation method of the three-dimensional tolerance adjuster includes the following steps:

[0084] Step 1: Thread the locking nut 1 to the screw 2, with the locking nut 1 abutting against the first limiting protrusion 21; see [link / reference] Figure 7 (a) in the middle;

[0085] Step 2: Apply anti-loosening adhesive to the second external thread section; see [link / reference] Figure 7 (b) in the middle;

[0086] Step 3, base 4 passes through screw 2; see Figure 7 (c) in the middle;

[0087] Step four, the threaded sleeve passes through screw 2; see also Figure 7 (d) in the middle;

[0088] Step 5: A nut 3 is threaded onto screw 2. (See also...) Figure 7 (e) and Figure 7 (f) in the middle.

[0089] After step five, the elastic claw of the base 4 is engaged in the slot on the second component 7. At this time, the external thread of the threaded sleeve is screwed into the internal thread of the second component 7.

[0090] The locking nut 1, screw 2 and nut 3 are linked together. After the locking nut 1 is adjusted in the X and Y directions, it passes through the limiting hole on the first component 6. At this time, the extension 42 of the base 4 is inserted into the limiting hole and partially extends out of the first component 6, limiting the relative X and Y positions of the base 4 and the first component 6.

[0091] The locking nut 1 is rotated circumferentially, and the screw 2 rotates synchronously with the locking nut 1. The second limiting boss abuts against the circumferential limiting groove 41.

[0092] Rotate nut 3 to adjust the gap between the first component 6 and the second component 7, thereby achieving Z-dimensional tolerance adjustment.

[0093] After the circumferentially rotated locking nut 1 is in place, the four corners of the locking nut 1 are respectively positioned in the gaps between adjacent extensions 42.

[0094] The locking nut 1 is rotated in the opposite direction, and the locking nut 1 moves away from the base 4 during the circumferential rotation guided by the guide surface on the extension 42. When the axial projection of the locking nut 1 is aligned with the axial projection of the limiting hole, the locking nut 1 moves away from the first component 6 axially, and is then removed.

[0095] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for installing a three-dimensional tolerance adjuster, characterized in that, The three-dimensional tolerance adjuster includes an adjuster base for connecting a first component and a second component. The adjuster base includes a base, a screw sleeve, a screw rod, a locking nut, and a nut. The screw is provided with a first external thread, a first limiting protrusion, a second limiting protrusion, and a second external thread in sequence along the axial direction; The first external threaded portion is threadedly connected to the locking nut, the first limiting protrusion is used to abut against the locking nut, and the distance from the outer wall of the locking nut to the central axis of the locking nut is not equal; The base and the spiral sleeve are threaded through the screw. The base is provided with an elastic claw, which is located around the spiral sleeve. A through hole is opened in the center of the base for the second limiting protrusion to pass through. A circumferential limiting groove is opened on the side of the base adjacent to the spiral sleeve for limiting the circumferential rotation angle of the second limiting protrusion. The through hole and the circumferential limiting groove are connected and communicated. The base is provided with an extension that extends toward the locking nut, and the extension and the elastic claw are located on different sides of the base; The outer wall of the spiral sleeve is provided with an external thread, and the spiral sleeve is provided with a circular hole that passes through the first limiting protrusion and the second limiting protrusion. There is an adjustment gap between the inner wall of the circular hole and the outer wall of the screw for X-axis position adjustment and Y-axis position adjustment. The second external thread is threadedly connected to the nut, and the nut abuts against the screw sleeve; The first component has a limiting hole through which the locking nut passes. The cross-sectional profile of the limiting hole matches the cross-sectional profile of the locking nut. After the locking nut passes through the limiting hole, the extension of the base is inserted into the limiting hole and partially extends out of the first component, thereby limiting the relative positions of the base and the first component in the X and Y directions. The locking nut is further limited to prevent it from coming off by rotating it circumferentially. The second component has a slot through which the elastic claw passes, and there are X-axis adjustment gaps and Y-axis adjustment gaps between the slot and the elastic claw; The second component has a threaded hole for threaded connection to the spiral sleeve; The installation method includes the following steps: Step 1: Connect the locking nut to the screw threadedly, with the locking nut abutting against the first limiting protrusion; Step 2: Apply anti-loosening adhesive to the second external thread portion; Step 3: The base passes through the screw; Step four, the spiral sleeve passes through the screw; Step 5: The screw is threaded with the nut; After step five, engage the elastic claw of the base into the slot on the second component. At this point, the external thread of the spiral sleeve is screwed into the internal thread of the second component. The locking nut, screw, and nut work together, and after the locking nut is adjusted in the X and Y directions, it passes through the limiting hole on the first component. At this time, the extension of the base is inserted into the limiting hole and partially extends out of the first component, limiting the relative X and Y positions of the base and the first component. The circumferentially rotating locking nut causes the screw and locking nut to rotate synchronously, and the second limiting boss abuts against the circumferential limiting groove; Rotate the nut to adjust the gap between the first and second components, thereby achieving Z-dimensional tolerance adjustment.

2. The installation method of a three-dimensional tolerance adjuster according to claim 1, characterized in that: The adjustment gap shall be no less than 2mm and no more than 3.5mm.

3. The installation method of a three-dimensional tolerance adjuster according to claim 1, characterized in that: The nut has a blind hole for threaded connection to the screw, and the axial length of the blind hole is greater than 6mm; The axial length of the second external thread is greater than 6 mm.

4. The installation method of a three-dimensional tolerance adjuster according to claim 1, characterized in that: The extension is provided in four parts, and the four extensions are arranged at equal intervals around the central axis of the perforation. The four extensions are provided with two mutually perpendicular limiting surfaces radially away from the perforation side, and the limiting surfaces are used for circumferential anti-rotation limiting of the base.

5. The installation method of a three-dimensional tolerance adjuster according to claim 1, characterized in that: The outer wall of the locking nut has a square cross-section; The cross-section of the outer wall of the first limiting protrusion is square; The axial orthographic projection of the first limiting protrusion coincides with the axial orthographic projection of the second limiting protrusion.

6. The installation method of a three-dimensional tolerance adjuster according to claim 1, characterized in that: The outer four-thirds circumferential area of ​​the second external thread portion is coated with anti-loosening adhesive.

7. The installation method of a three-dimensional tolerance adjuster according to claim 1, characterized in that: The axial length of the extension is less than the axial length of the limiting hole, and the extension is used to be inserted into the limiting hole. After the extension is inserted into the limiting hole, the locking nut rotates along the first circumferential direction. When the locking nut is rotated into place along the first circumferential direction, the second limiting protrusion rotates and abuts against the circumferential limiting groove. The four corners of the locking nut are embedded between adjacent extensions. The extension is provided with an inner recess that the locking nut avoids when rotating along the first circumferential direction.

Images