A latch-type axial tolerance adjuster

Abstract

The present invention provides a latch-type axial tolerance adjuster, comprising: a base member connected to a lower plate, and a threaded tube screwed into the base member; the base member is connected to the lower plate member through a support member; a circle of grooves is provided on the outer side of the threaded tube on the side of the lower plate member; the support member comprises: a support frame connecting the lower plate member and the base member, the support frame extending inwardly with two blocking parts, each of the blocking parts having an inner hook engaged with the groove; a friction unit is provided in the threaded tube, which is passed through the upper plate member by a bolt and has an interference fit with the friction unit. By adopting a slotted design for the threaded tube, it is locked with the inner hook of the support member to prevent the threaded tube from falling off in the pre-installed state. Only when the bolt is penetrated into the top-open blocking part, the threaded tube can start the adjustment function; thereby effectively solving the technical problem in the traditional technology that the device cannot complete the compensation work because the threaded tube is not restricted and is easy to be screwed out and fall off in the pre-installed state.

Description

Technical Field

[0001] The present invention relates to the field of tolerance adjustment, and particularly to a latch-type axial tolerance adjuster. Background Art

[0002] During the assembly process of two or more assembly parts, due to reasons such as bending deformation and cumulative tolerance of the assembly parts, it is easy to cause the assembly parts to not be precisely matched. Therefore, an axial tolerance adjustment device is usually required to control the axial position of its adjustment component to eliminate the above-mentioned deviation so that the relative position of the parts meets the design requirements.

[0003] Most of the existing axial tolerance adjustment devices on the market use metal parts or metal & plastic combination parts, and utilize the friction between the bolt and the friction unit to achieve axial tolerance adjustment.

[0004] For example, in the patent application number: CN202121231757.3, an axial tolerance adjustment device is disclosed, including a compensation component, a base component, a gasket and a nut cooperating with a connecting bolt. The compensation component is connected in the base component, the base component is used to connect with a connecting plate, the connecting bolt is provided with an anti-detachment groove, the gasket is provided with an anti-detachment part cooperating with the anti-detachment groove, and the anti-detachment part is snapped into the anti-detachment groove to limit the connecting bolt from detaching from the tolerance adjustment device. The present invention can screw two components onto each other across the joint gap affected by the tolerance and prevent the connecting bolt from falling off the tolerance adjustment device.

[0005] In this device, the user inserts the bolt into the inner liner and then turns it, initially taps the thread on the friction unit of the inner liner, and drives the inner liner and the threaded tube to screw out of the fixing nut, thereby achieving compensation; in actual use, when the bolt is turned, in the pre-installed state, the inner liner and the threaded tube will screw out of the fixing nut, there is a risk of falling off, resulting in the device being unable to complete the compensation work. Summary of the Invention

[0006] A latch-type axial tolerance adjuster of the present invention is used to solve the technical problem in the background art that in the pre-installed state, due to the lack of restriction of the threaded tube, it is easy to screw out and fall off, resulting in the device being unable to complete the compensation work.

[0007] The technical solution provided by the present invention is as follows: A latch-type axial tolerance adjuster includes: a base member connected to a lower plate member, and a threaded tube screwed in the base member; the base member is connected to the lower plate member through a support member;

[0008] A groove is provided in a circle on the outer side of the threaded tube on the side of the lower plate member;

[0009] The support member includes: a support frame connecting the lower plate member and the base member, two blocking parts extend inward from the support frame, and inner hooks engaged with the groove are provided on both the blocking parts;

[0010] The threaded pipe is provided with a friction unit inside. The bolt passes through the upper plate member and has an interference fit with the friction unit. The bolt presses against the blocking portion, causing the inner hook to displace to both sides and disengage from the groove, thereby realizing the adjustment of the threaded pipe.

[0011] Furthermore, the threaded pipe has a hollow flange portion on the side of the upper plate member.

[0012] Furthermore, the friction unit is snap-fitted inside the threaded pipe.

[0013] Furthermore, a polygonal groove is formed inside the threaded pipe, and an anti-disengagement step is formed on the side of the lower plate member inside the threaded pipe; the outside of the friction unit fits with the inside of the threaded pipe, and the friction unit extends outward with an anti-disengagement hook that is snap-fitted at the anti-disengagement step.

[0014] Furthermore, an internal thread for screwing with the threaded pipe is formed inside the base member.

[0015] Furthermore, the helix directions of the internal thread inside the base member and the external thread outside the threaded pipe are both opposite to the helix direction of the bolt thread.

[0016] Furthermore, the base member includes an adjustment portion and a support platform; a groove is provided inside the base member on the side of the groove, and the inner hook is located inside the groove.

[0017] Furthermore, the support frame has two upper hooks that are snap-fitted with the support platform, and the support frame has two lower hooks that pass through the lower plate member and are snap-fitted with the lower plate member.

[0018] Furthermore, a fastening nut is connected to the side of the lower plate member away from the upper plate member, and the fastening nut is screwed with the bolt.

[0019] Furthermore, the friction unit is an injection molded part.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] (1) For the axial tolerance adjuster of the present invention, by adopting the design of grooving the threaded pipe and locking with the inner hook of the support member, the detachment of the threaded pipe in the pre-installed state is prevented. Only when the bolt is screwed in to push open the blocking portion can the threaded pipe start the adjustment function; thus effectively solving the technical problem in the traditional technology that in the pre-installed state, due to the unrestricted threaded pipe, it is easy to unscrew and fall off, resulting in the device being unable to complete the compensation work.

[0022] (2) For the axial tolerance adjuster of the present invention, by providing a large flange portion on the threaded pipe, when it is pushed out, the contact surface with the upper sheet metal is large enough, which can effectively solve the technical problem in the traditional technology that due to the small pushing surface, the pressure between the threaded pipe and the sheet metal is large, resulting in the deformation of the sheet metal at the jacking position. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1It is an exploded view of the axial tolerance adjuster of the present invention;

[0024] Figure 2 It is an assembled three-dimensional view of the axial tolerance adjuster of the present invention;

[0025] Figure 3 It is a three-dimensional view and a sectional view of the threaded tube in the present invention;

[0026] Figure 4 It is a three-dimensional view of the friction unit in the present invention;

[0027] Figure 5 It is a three-dimensional view of the support member in the present invention;

[0028] Figure 6 It is a three-dimensional view of the threaded tube in the present invention;

[0029] Figure 7 It is an assembled three-dimensional view of the threaded tube and the friction unit in the present invention;

[0030] Figure 8 It is an assembled three-dimensional view of the base member, the threaded tube, the friction unit and the support member in the present invention;

[0031] Figure 9 It is a sectional view of the base member, the threaded tube, the friction unit and the support member in the present invention;

[0032] Figure 10 It is a sectional view of the state where the bolt penetrates into the friction unit in the present invention;

[0033] Figure 11 It is a schematic diagram of the adjustment change state of the axial tolerance adjuster of the present invention.

[0034] The reference numerals are as follows: 1. upper plate member, 2. lower plate member, 3. base member, 31. adjusting portion, 32. support platform, 33. groove, 4. threaded tube, 41. groove, 42. flange portion, 43. polygonal groove, 44. anti-disengagement step, 5. friction unit, 51. anti-disengagement hook, 6. support member, 61. support frame, 62. blocking portion, 63. inner hook, 64. upper hook, 65. lower hook, 7. bolt, 8. fastening nut. Detailed implementation manners

[0035] The present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] As Figures 1-11 shown, the present invention is a latch-type axial tolerance adjuster, including: a base member 3 connected to the lower plate member 2, and a threaded tube 4 screwed into the base member 3; the base member 3 is connected to the lower plate member 2 through a support member 6;

[0037] A groove 41 is provided in a circle on the outer side of the threaded tube 4 on the side of the lower plate member 2;

[0038] The support member 6 includes: a support frame 61 connecting the lower plate member 2 and the base member 3. Two blocking portions 62 extend inward from the support frame 61, and inner hooks 63 for engaging with the groove 41 are provided on the blocking portions 62;

[0039] A friction unit 5 is provided inside the threaded tube 4. The bolt 7 passes through the upper plate member 1 and is in interference fit with the friction unit 5. The bolt 7 presses the blocking portion 62, causing the inner hook 63 to displace to both sides and disengage from the groove 41, realizing the adjustment of the threaded tube 4.

[0040] The friction unit 5 in this embodiment is an injection molded part. When the bolt 7 is tightened and inserted, threads are formed by extrusion on its inner wall, realizing the interference fit between the friction unit 5 and the bolt 7.

[0041] The threaded tube 4 in this embodiment is a metal part with a certain rigidity, thereby realizing the support for the plate member.

[0042] In some embodiments, the threaded tube 4 can be an injection molded part, replacing the role of the friction unit 5 in this embodiment, and the threaded tube 4 is in interference fit with the bolt 7.

[0043] Internal threads for screwing with the threaded tube 4 are provided on the inner side of the base member 3 in this embodiment; the helix directions of the internal threads on the inner side of the base member 3 and the external threads on the outside of the threaded tube 4 are both opposite to the helix direction of the threads of the bolt 7.

[0044] Specifically, the helix direction of the threads of the bolt 7 is a right-handed thread, and the helix directions of the internal threads on the inner side of the base member 3 and the external threads on the outside of the threaded tube 4 are both left-handed threads; when the bolt 7 is rotated clockwise, the bolt 7 moves downward, and when the threaded tube 4 is rotated clockwise inside the base member 3, the threaded tube 4 moves upward.

[0045] Specifically, when the bolt 7 is tightened clockwise, the friction unit 5 is in interference fit with it and rotates clockwise accordingly, thereby driving the threaded tube 4 to screw out of the base member 3 clockwise through the friction unit 5, realizing the axial adjustment of the threaded tube 4.

[0046] Specifically, when the bolt 7 passes through the upper plate member 1 and contacts the friction unit 5, the bolt 7 continues to be tightened and screwed into the friction unit 5, and threads are formed by extrusion on the inner wall of the friction unit 5. However, at this time, the groove 41 of the threaded tube 4 is still in a locked state with the inner catch 63 of the support member 6. When the bolt 7 is screwed in, the threaded tube 4 does not move up and down, and no adjustment occurs. When the bolt 7 is further screwed in, after the front end guide of the bolt 7 contacts the blocking portion 62 of the support member 6, the bolt 7 pushes the blocking portion 62 left and right to open. The opening of the blocking portion 62 drives the inner catch 63 to displace to both sides and disengage from the groove 41. The threaded tube 4 is no longer restricted by the locking connection. When the bolt 7 is further screwed in, it will drive the threaded tube 4 to rotate and move upward, thereby achieving the adjustment function. By adopting the grooving design of the threaded tube 4 and locking it with the inner catch 63 of the support member 6, the threaded tube 4 is prevented from falling off in the pre-installed state. Only when the bolt 7 screws in and pushes open the blocking portion 62 can the threaded tube 4 start the adjustment function. Thus, it effectively solves the technical problem in the traditional technology that in the pre-installed state, due to the unrestricted threaded tube 4, it is easy to spin out and fall off, resulting in the device being unable to complete the compensation work.

[0047] In this embodiment, the threaded tube 4 has a hollow flange portion 42 on the side of the upper plate member 1.

[0048] The flange portion 42 of this embodiment is integrally formed with the threaded tube 4.

[0049] Specifically, by providing the flange portion 42 on the threaded tube 4, the surface diameter of the flange portion 42 is larger than the diameter of the threaded tube 4. When it is pushed out, the contact surface with the upper sheet metal is large enough, which can effectively solve the technical problem in the traditional technology that due to the small jacking surface and the large pressure between the sheet metal, the sheet metal at the jacking place is easily deformed.

[0050] In this embodiment, the friction unit 5 is snap-fitted inside the threaded tube 4.

[0051] In this embodiment, a polygonal groove 43 is formed inside the threaded tube 4, and an anti-drop step 44 is formed inside the threaded tube 4 on the side of the lower plate member 2; the outside of the friction unit 5 fits with the inside of the threaded tube 4, and the friction unit 5 extends outward with an anti-drop catch 51 that is snap-fitted at the anti-drop step 44.

[0052] Specifically, the friction unit 5 is inserted into the threaded tube 4, the anti-drop catch 51 is snapped into the anti-drop step 44, and the outside of the friction unit 5 fits and is limited by the polygonal groove 43 inside the threaded tube 4, thereby preventing the friction unit from falling off. At the same time, when the bolt 7 drives the friction unit 5 to rotate, the friction unit 5 drives the threaded tube 4 to rotate together, thereby achieving the axial adjustment function.

[0053] In some other embodiments, the friction unit 5 can also be connected inside the threaded tube 4 by bonding or other means.

[0054] In this embodiment, the base member 3 includes an adjusting portion 31 and a support platform 32; a groove 33 is provided on the side of the groove 41 inside the base member 3, and the inner hook 63 is within the groove 33.

[0055] In this embodiment, the diameter of the groove 33 is greater than the stroke of the left - right displacement of the inner hook 63. When the bolt 7 pushes the two inner hooks 63 to displace to both sides, there is enough space in the groove 33 to ensure their displacement.

[0056] Specifically, the groove 33 is opened in the base member 3 to ensure the clamping gap between the inner hook 63 and the groove 41.

[0057] In this embodiment, the support frame 61 has two upper hooks 64 that are clamped to the support platform 32, and the support frame 61 has two lower hooks 65 that pass through the lower plate member 2 and are clamped to the lower plate member 2.

[0058] In this embodiment, a card slot is opened on the lower plate member 2. To install the support member 6, the lower hooks 65 are clamped on both sides of the card slot, the upper hooks 64 pass through the card slot and are clamped on the support platform 32, the blocking portion 62 is between the card slots, and the inner hook 63 is clamped in the groove 41 on the card slot.

[0059] Specifically, the upper hook 64 is clamped to the support platform 32 to achieve a horizontal upper limit for the base member 3, preventing it from rotating or displacing horizontally; at the same time, the upper hook 64 and the lower hook 65 cooperate to fix the base member 3 to the lower plate member 2, achieving a limit for the base member 3 and preventing it from displacing axially; this is used to ensure the rotation of the threaded tube 4, thereby achieving the axial adjustment function.

[0060] In this embodiment, a fastening nut 8 is connected to the side of the lower plate member 2 away from the upper plate member 1, and the fastening nut 8 is screwed to the bolt 7.

[0061] In this embodiment, the outer diameter of the fastening nut 8 is greater than the short - side length of the card slot on the lower plate member 2.

[0062] Specifically, when the adjustment is completed, the bolt 7 continues to be tightened and enters the fastening nut 8, and finally is tightened to connect the axial tolerance adjuster and the upper and lower sheet metal assemblies.

[0063] Working principle: When the bolt 7 passes through the upper plate member 1 and contacts the friction unit 5, the bolt 7 continues to be tightened and threaded into the friction unit 5, and threads are formed by extrusion on the inner wall of the friction unit 5. However, at this time, the groove 41 of the threaded pipe 4 is still in a locked state with the inner catch 63 of the support member 6. When the bolt 7 is threaded in, the threaded pipe 4 does not move up and down and no adjustment occurs; when the bolt 7 is further screwed in, after the front-end guide of the bolt 7 contacts the blocking portion 62 of the support member 6, the bolt 7 pushes the blocking portion 62 left and right to open it. The opening of the blocking portion 62 drives the inner catch 63 to displace to both sides and disengage from the groove 41. The threaded pipe 4 is no longer restricted by the locking connection. When the bolt 7 is further screwed in, it will drive the threaded pipe 4 to rotate and move upward, and the upper plate member 1 is lifted and supported by the flange portion 42, thereby achieving the adjustment function; when the flange portion 42 at the upper end of the threaded pipe 4 contacts the upper sheet metal 1, the threaded pipe 4 no longer moves upward for adjustment and is thus locked. The bolt 7 continues to be tightened into the fastening nut 8 and is finally tightened to connect the axial tolerance adjuster and the upper and lower sheet metal assemblies. By adopting the grooving design of the threaded pipe 4 and locking it with the inner catch 63 of the support member 6, the detachment of the threaded pipe 4 in the pre-installed state is prevented. Only when the bolt 7 is threaded in and pushes open the blocking portion 62 can the threaded pipe 4 start the adjustment function; thus effectively solving the technical problem in the traditional technology that in the pre-installed state, due to the unrestricted threaded pipe 4, it is easy to spin out and fall off, resulting in the device being unable to complete the compensation work.

Claims

1. A latch - type axial tolerance adjuster, comprising: a base member (3) connected to a lower plate member (2), and a threaded tube (4) screwed into the base member (3); characterized in that the base member (3) is connected to the lower plate member (2) through a support member (6); a circumferential groove (41) is provided on the outer side of the threaded tube (4) on the side of the lower plate member (2); the support member (6) includes: a support frame (61) connecting the lower plate member (2) and the base member (3), two blocking portions (62) extending inwards from the support frame (61), and inner hooks (63) engaging with the groove (41) are provided on each of the blocking portions (62); a friction unit (5) is provided inside the threaded tube (4), a bolt (7) passes through an upper plate member (1) and has an interference fit with the friction unit (5), and the bolt (7) presses the blocking portion (62) so that the inner hook (63) is displaced to both sides and disengages from the groove (41), realizing the adjustment of the threaded tube (4); a polygonal groove (43) is provided inside the threaded tube (4), and an anti - detachment step (44) is provided on the side of the threaded tube (4) on the side of the lower plate member (2); the outer part of the friction unit (5) fits with the inside of the threaded tube (4), and an anti - detachment hook (51) that is snap - fitted at the anti - detachment step (44) extends outwards from the friction unit (5); the base member (3) includes: an adjustment portion (31) and a support platform (32); a groove (33) is provided inside the base member (3) on the side of the groove (41), and the inner hook (63) is inside the groove (33).

2. A latch - type axial tolerance adjuster according to claim 1, characterized in that, the threaded tube (4) has a hollow flange portion (42) on the side of the upper plate member (1).

3. A latch - type axial tolerance adjuster according to claim 1, characterized in that, an internal thread for screwing with the threaded tube (4) is provided on the inner side of the base member (3).

4. A latch - type axial tolerance adjuster according to claim 3, characterized in that, the thread rotation directions of the internal thread on the inner side of the base member (3) and the external thread on the outside of the threaded tube (4) are both opposite to the thread rotation direction of the bolt (7).

5. A latch - type axial tolerance adjuster according to claim 1, characterized in that, two upper hooks (64) engaging with the support platform (32) are provided on the support frame (61), and two lower hooks (65) passing through the lower plate member (2) and engaging with the lower plate member (2) are provided on the support frame (61).

6. A latch - type axial tolerance adjuster according to claim 1, characterized in that, a fastening nut (8) is connected to the side of the lower plate member (2) away from the upper plate member (1), and the fastening nut (8) is screwed with the bolt (7).

7. A latch - type axial tolerance adjuster according to claim 1, characterized in that, the friction unit (5) is an injection - molded part.

Images