A damage-proof automobile door trim buckle rotation locking device

Abstract

The present invention relates to a damage-proof automobile door trim buckle rotation locking device, comprising a fixed component, a telescopic component that telescopes along an axis in the fixed component, a rotating component that rotates around an axis in the fixed component, and a driving mechanism that drives the telescopic component to telescope in the fixed component; the fixed component comprises an outer sleeve, a positioning block, a fixed seat, two stop pins and a spring seat, and the front part of the positioning block has a contoured notch; the rotating component comprises a clamping core rod and a cross pin, and the clamping core rod comprises a clamping claw part, a front thin section, a flange part and a rear thin section that are connected in sequence, and the clamping claw part passes through the front part of the positioning block and clamps the buckle in cooperation with the contoured notch. The device decomposes the action of the clamping core rod into two stages: in-situ rotation and axial movement, and clamps the buckle with a smaller axial force, thereby avoiding excessive torque of synchronous rotation and damaging the buckle.

Description

Technical Field

[0001] The invention relates to the technical field of workpiece clamping devices, and in particular to a damage-proof automobile door trim buckle rotation locking device. Background Art

[0002] In order to ensure the product size during the manufacturing stage, the automotive door trim will use inspection equipment such as jigs / measuring brackets for quality management. On the equipment such as jigs / measuring brackets, it is necessary to simulate the installation of the trim according to the actual loading status. Therefore, it is necessary to use the door trim clips used during loading and the jigs / measuring brackets for positioning and locking. The door trim clips are made of plastic and are locked in one direction by deformation. If disassembly is required, they are easily damaged. There are two existing solutions on the market, but both methods have their own disadvantages:

[0003] 1) The buckle is pushed out by force through the clamp; each use will cause a certain degree of damage to the claws of the plastic buckle, and a large thrust is required to push the clamp out, which is inconvenient to use. Poor reliability and prone to jamming.

[0004] 2) Use clamps or pull ropes to synchronize the rotation and extension of the positioning point. When installing and removing parts, because the rotation and extension are synchronized, there is hard wear between the plastic buckle and the metal positioning mechanism, and there is still a certain degree of damage to the buckle.

[0005] Chinese patent CN 221561113U discloses a fixture, including a main body, a positioning frame, a first seat body and a second seat body, the positioning frame has a positioning section, a handle section, a connecting section and a clamping column, the clamping column is connected to the front end of the positioning section, the first seat body has a positioning hole, and two clamping rings are arranged in the hole of the positioning hole.

[0006] The clamping ring is arranged in an arc shape, and a gap is formed between the two clamping rings. The adjustment section can extend into the clamping ring of the first seat body and allow the clamping column to pass through the gap, and then the clamping column is clamped on the back of the clamping ring by rotating the handle section. The back of the clamping ring has an introduction surface whose thickness increases by rotation. The adjustment frame is a mechanism used to tighten the first seat body and the second seat body. The clamping column acts on the introduction surface to continuously increase the clamping force, so that the first seat body and the second seat body are close to clamp the workpiece. However, this clamping method will cause the clamping column to exert a great pressure on the clamping ring, making the clamping column and the clamping ring extremely easy to wear each other. The buckle on the car door trim is a structure similar to the buckle, so if the above structure is used to clamp the buckle of the door trim, it will also easily damage the claw and buckle.

[0007] Therefore be necessary to improve the locking device to solve the above problems. Summary of the invention

[0008] The main purpose of the present invention is to provide a damage-proof automobile door trim buckle rotation locking device, which can enable the clamping claw part to clamp the door trim buckle with a small axial force after rotation to avoid damage to the buckle.

[0009] The present invention achieves the above-mentioned object through the following technical solutions: A damage-proof automobile door trim buckle rotation locking device, comprising a fixed component, a telescopic component that telescopes along an axis in the fixed component, a rotating component that rotates around an axis in the fixed component, and a driving mechanism that drives the telescopic component to telescope in the fixed component;

[0010] The fixing assembly includes an outer sleeve, a positioning block, a fixing seat, two anti-rotation pins and a spring seat, the positioning block, the outer sleeve, the fixing seat and the spring seat are in a coaxial relationship and the middle parts are all through, the positioning block is connected to the front end of the outer sleeve, the fixing seat is connected to the rear end of the outer sleeve, the spring seat is located in the outer sleeve and is provided with a pair of side holes on both radial sides, and two anti-rotation pins respectively embedded in the two side holes are fixed on both radial sides of the outer sleeve;

[0011] The telescopic assembly includes a guide sleeve, a threaded connection kit and a second spring. The guide sleeve is an axially hollow structure, and a pair of limiting long holes are provided on both sides of the rear section, and a pair of spiral long holes are provided on both sides of the front section along the generatrix direction. The fixing seat, the guide sleeve and the outer sleeve are arranged from the inside to the outside, and the two limiting long holes are respectively passed through by two anti-rotation pins. The rear part of the guide sleeve is connected to the driving mechanism through the threaded connection kit;

[0012] The rotating assembly includes a clamping core rod and a transverse pin. The clamping core rod includes a clamping claw portion, a front thin segment, a flange portion and a rear thin segment connected in sequence. The clamping claw portion passes through the front of the positioning block and cooperates with the contoured notch to clamp the buckle. The transverse pin passes through the front thin segment in a radial direction. Both ends of the transverse pin extend into the spiral long hole. The second spring surrounds the rear thin segment. The rear of the second spring abuts against the spring seat. The elastic force of the second spring acts on the rear of the flange portion. A space is formed between the guide sleeve and the spring seat to limit the advance and retreat range of the flange portion.

[0013] Specifically, the driving mechanism is a push-pull clamp, which includes a fixed sleeve fixed to the rear of the fixed seat, a driving shaft passing through the center of the fixed sleeve, and a connecting rod handle for controlling the axial extension and retraction of the driving shaft along the fixed sleeve, and the rear of the guide sleeve is connected to the driving shaft through the threaded connection kit.

[0014] Furthermore, the telescopic assembly also includes a first spring, which surrounds the driving shaft and has two ends respectively abutting against the threaded connection kit and the fixing seat.

[0015] Furthermore, the outer sleeve includes a straight tube portion and an expansion portion at the rear of the straight tube portion, and a spring receiving chamber is provided at the rear of the expansion portion, and the spring receiving chamber is used to receive the first spring.

[0016] Specifically, the rotating assembly further includes a thrust spherical bearing, and the front portion of the second spring presses the thrust spherical bearing onto the rear surface of the flange portion.

[0017] Specifically, a flat head screw is provided at the rear of the clamping mandrel, and the flat head screw is blocked at the rear of the guide sleeve.

[0018] The beneficial effects of the technical solution of the present invention are:

[0019] When the driving mechanism is not operated, the first spring and the second spring will first move the clamping mandrel forward, and the position of the clamping claw part and the contoured notch will be offset, and the buckle of the automobile door trim can be stuck in the contoured notch; then the connecting rod handle is operated to move the guide sleeve forward. In the early stage of the movement of the guide sleeve, the clamping mandrel will be operated in an extended state by the action of the second spring, but the spiral long hole will drive the clamping mandrel to rotate through the cross pin until the inner wall of the guide sleeve contacts the front of the flange, and the clamping claw part will turn to the rear of the buckle; then the guide sleeve will pull the clamping mandrel back, and the clamping claw part will resist the buckle, thereby clamping the buckle with less pressure. This device decomposes the action of the clamping mandrel into two stages: in-situ rotation and axial movement, and clamps the buckle with a smaller axial force, so as to avoid excessive torque of synchronous rotation and damage to the buckle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional diagram of the rotary locking device of the embodiment in use;

[0021] Figure 2 It is a partial stereoscopic diagram of the rotation locking device and the buckle fixing position;

[0022] Figure 3 is a three-dimensional diagram of a rotary locking device;

[0023] Figure 4 is an axial full-section view of the rotary locking device;

[0024] Figure 5 for Figure 4 A partial enlarged view of position A in the middle;

[0025] Figure 6 A perspective view of a fixed assembly;

[0026] Figure 7 is a three-dimensional diagram of a spring seat;

[0027] Figure 8is a stereogram of a telescopic assembly;

[0028] Fig. 9 is a three-dimensional diagram of the rotating assembly and the second spring;

[0029] Fig.10 A perspective view of a push-pull clamp.

[0030] The numbers in the figure represent:

[0031] 1- Rotation locking device,

[0032] 11-fixed assembly, 111-outer sleeve, 1111-straight tube, 1112-expansion part, 11121-spring receiving chamber, 112-positioning block, 1121-profile notch, 113-fixed seat, 114-stop pin, 115-spring seat, 1151-side hole,

[0033] 12- telescopic assembly, 121- guide sleeve, 1211- limiting long hole, 1212- spiral long hole, 122- threaded connection kit, 123- first spring, 124- second spring,

[0034] 13-rotating assembly, 131-clamping mandrel, 1311-claw portion, 1312-front thin section, 1313-flange portion, 1314-rear thin section, 132-cross pin, 133-flat head screw, 134-thrust spherical bearing,

[0035] 14-driving mechanism, 141-fixed sleeve, 142-driving shaft, 143-connecting rod handle;

[0036] 2-Fix the bracket;

[0037] 3-car door trim, 31-clip. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below with reference to specific embodiments.

[0039] Example:

[0040] like Figures 1 to 3 As shown, an anti-damage type automobile door trim buckle rotation locking device 1 of the present invention includes a fixed component 11, a telescopic component 12 that is telescopic along the axis in the fixed component 11, a rotating component 13 that rotates around the axis in the fixed component 11, and a driving mechanism 14 that drives the telescopic component 12 to telescope in the fixed component 11.

[0041] like Figures 4 to 7As shown, the fixing assembly 11 includes an outer sleeve 111, a positioning block 112, a fixing seat 113, two stop pins 114 and a spring seat 115. The positioning block 112, the outer sleeve 111, the fixing seat 113 and the spring seat 115 are in a coaxial relationship and the middle parts are all through. The outer sleeve 111 includes a straight tube portion 1111 and an expansion portion 1112 at the rear of the straight tube portion 1111. The positioning block 112 is connected to the front end of the outer sleeve 111, the fixing seat 113 is connected to the rear end of the outer sleeve 111, the spring seat 115 is located in the outer sleeve 111 and has a pair of side holes 1151 on both radial sides. Two stop pins 114 respectively embedded in the two side holes 1151 are fixed on both radial sides of the outer sleeve 111. The front part of the positioning block 112 has a contoured notch 1121 that matches the shape of the buckle 31 of the automobile door trim 3. A spring receiving chamber 11121 is disposed at the rear of the expansion portion 1112 . The spring receiving chamber 11121 is used to receive the first spring 123 .

[0042] All parts of the fixing assembly 11 are fixed during operation, wherein the positioning block 112 is a basic positioning component used to fit closely to the buckle 31. The outer sleeve 111 is a shell component used to surround the telescopic assembly 12 and the rotating assembly 13. The fixing seat 113 is fixed to the fixing bracket 2, and the positioning block 112 is connected to the automobile door trim 3. The appearance of the fixing assembly 11 is thin at the front and thick at the back. On the one hand, the structure of the entire rotating locking device 1 is relatively stable under load, and on the other hand, the expansion portion 1112 leaves enough wall thickness for the spring receiving chamber 11121 to hide the first spring 123 inside.

[0043] like Fig.10 As shown, the driving mechanism 14 is a push-pull type clamp, which includes a fixed sleeve 141 fixed to the rear of the fixed seat 113, a driving shaft 142 passing through the center of the fixed sleeve 141, and a connecting rod handle 143 for controlling the driving shaft 142 to extend and retract along the axial direction of the fixed sleeve 141.

[0044] The push-pull type clamp is a standard part. The connecting rod handle 143 is a structure formed by a plurality of connecting rods and a handle being hinged to each other. When the end of the handle is pressed down, the driving shaft 142 can be extended and retracted in the fixing sleeve 141.

[0045] like Figure 4 , Figure 5 and Figure 8As shown, the telescopic assembly 12 includes a guide sleeve 121, a threaded connection kit 122, a first spring 123 and a second spring 124. The guide sleeve 121 is an axial hollow structure, and a pair of limiting long holes 1211 are provided on both sides of the rear section, and a pair of spiral long holes 1212 are provided on both sides of the front section along the generatrix direction. The rear part of the guide sleeve 121 is connected to the driving shaft 142 of the driving mechanism 14 through the threaded connection kit 122. The first spring 123 surrounds the driving shaft 142 and the two ends are respectively abutted on the threaded connection kit 122 and the fixing seat 113. The fixing seat 113, the guide sleeve 121, and the outer sleeve 111 are arranged from the inside to the outside, and the two limiting long holes 1211 are respectively penetrated by two stop pins 114.

[0046] The telescopic assembly 12 can be axially telescopic in the fixed assembly 11. The guide sleeve 121 can be regarded as a piston that moves axially in the outer sleeve 111, but is also used to drive the rotating assembly 13 to rotate and move slightly axially. The first spring 123 is used to automatically reset the guide sleeve 121 forward when the connecting rod handle 143 is loosened. Because the fixed seat 113 and the outer sleeve 111 are located on the inner and outer sides of the guide sleeve 121 and there is a fixed relationship between the two, they are connected by the stop pin 114, and the matching relationship between the limit long hole 1211 and the stop pin 114 makes the guide sleeve 121 have only the freedom of axial movement.

[0047] like Figure 3 , Figure 4 and Fig. 9 As shown, the rotating assembly 13 includes a clamping mandrel 131, a transverse pin 132, a flat head screw 133 and a thrust spherical bearing 134. The clamping mandrel 131 includes a clamping claw portion 1311, a front thin segment 1312, a flange portion 1313 and a rear thin segment 1314 connected in sequence. The clamping claw portion 1311 passes through the front of the positioning block 112 and clamps the buckle 31 in cooperation with the contoured notch 1121. The transverse pin 132 passes through the front thin segment 1312 in the radial direction, and the two ends of the transverse pin 132 extend into the spiral long hole 1212. The second spring 124 surrounds the rear thin segment 1314, the rear part of the second spring 124 abuts against the spring seat 115, and the front part presses the thrust spherical bearing 134 on the rear surface of the flange portion 1313. A space is formed between the guide sleeve 121 and the spring seat 115 to limit the advance and retreat range of the flange portion 1313. The flat head screw 133 is disposed at the rear of the clamping core rod 131 , and the flat head screw 133 is blocked at the rear of the guide sleeve 121 .

[0048] The flat head screw 133 and the flange 1313 allow the clamping core rod 131 to extend and retract only within a certain axial range in the guide sleeve 121. The relative positions of the spring seat 115 and the positioning block 112 are fixed, and the elastic force of the second spring 124 acts on the rear of the flange 1313, so that the clamping core rod 131 tends to move away from the spring seat 115, so the clamping claw 1311 initially extends outward from the positioning block 112 for a short distance, and the position of the clamping claw 1311 does not hinder the buckle 31 from entering the contoured notch 1121. The spiral long hole 1212 can affect the rotation angle of the clamping core rod 131 by acting on the cross pin 132, so the axial movement speed of the clamping core rod 131 relative to the guide sleeve 121 is proportional to the angular velocity. Therefore, during the extension and retraction of the guide sleeve 121, the clamping core rod 131 will first rotate in place, and the thrust spherical bearing 134 can prevent the second spring 124 from moving with it and damaging the flange portion 1313 or the spring seat 115 while allowing the clamping core rod 131 to rotate freely under low friction. The clamping claw portion 1311 will then go around to the reverse side of the buckle 31. When the inner wall of the guide sleeve 121 contacts the front surface of the flange portion 1313, the clamping core rod 131 will slightly retreat, thereby pressing against the reverse side of the buckle 31, and cooperating with the positioning block 112 to complete the locking of the buckle 31.

[0049] The working principle of this device is:

[0050] When the driving mechanism 14 is not operated, the first spring 123 and the second spring 124 will first move the clamping core rod 131 forward, and the position of the clamping claw portion 1311 and the contoured notch 1121 will be staggered, and the buckle 31 of the automobile door trim panel 3 can be stuck in the contoured notch 1121; then the connecting rod handle 143 is operated to move the guide sleeve 121 forward. In the early stage of the movement of the guide sleeve 121, the clamping core rod 131 will be operated in an extended state due to the action of the second spring 124, but the spiral long hole 1212 will drive the clamping core rod 131 to rotate through the cross pin 132 (the maximum rotation angle in this embodiment is 60°) until the inner wall of the guide sleeve 121 contacts the front part of the flange portion 1313, and the clamping claw portion 1311 will rotate to the rear of the buckle 31; then the guide sleeve 121 will pull the clamping core rod 131 back, and the clamping claw portion 1311 will press against the buckle 31, thereby clamping the buckle 31 with less pressure. The device decomposes the action of clamping the core rod 131 into two stages: in-situ rotation and axial movement, and clamps the buckle 31 with a relatively small axial force, thereby preventing the buckle 31 from being damaged by excessive torque of synchronous rotation.

[0051] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A damage-resistant automobile door trim buckle rotation locking device, characterized in that: It comprises a fixed component, a telescopic component that telescopes along an axis in the fixed component, a rotating component that rotates around an axis in the fixed component, and a driving mechanism that drives the telescopic component to telescope in the fixed component; The fixing assembly includes an outer sleeve, a positioning block, a fixing seat, two anti-rotation pins and a spring seat, the positioning block, the outer sleeve, the fixing seat and the spring seat are in a coaxial relationship and the middle parts are all through, the positioning block is connected to the front end of the outer sleeve, the fixing seat is connected to the rear end of the outer sleeve, the spring seat is located in the outer sleeve and is provided with a pair of side holes on both radial sides, two anti-rotation pins respectively embedded in the two side holes are fixed on both radial sides of the outer sleeve, and the front part of the positioning block has a contoured notch matching the buckle shape of the automobile door trim panel; The telescopic assembly includes a guide sleeve, a threaded connection kit and a second spring. The guide sleeve is an axially hollow structure, and a pair of limiting long holes are provided on both sides of the rear section, and a pair of spiral long holes are provided on both sides of the front section along the generatrix direction. The fixing seat, the guide sleeve and the outer sleeve are arranged from the inside to the outside, and the two limiting long holes are respectively passed through by two anti-rotation pins. The rear part of the guide sleeve is connected to the driving mechanism through the threaded connection kit; The rotating assembly includes a clamping core rod and a transverse pin. The clamping core rod includes a clamping claw portion, a front thin segment, a flange portion and a rear thin segment connected in sequence. The clamping claw portion passes through the front of the positioning block and cooperates with the contoured notch to clamp the buckle. The transverse pin passes through the front thin segment in a radial direction. Both ends of the transverse pin extend into the spiral long hole. The second spring surrounds the rear thin segment. The rear of the second spring abuts against the spring seat. The elastic force of the second spring acts on the rear of the flange portion. A space is formed between the guide sleeve and the spring seat to limit the advance and retreat range of the flange portion.

2. The anti-damage automobile door trim buckle rotation locking device according to claim 1, characterized in that: The driving mechanism is a push-pull clamp, which includes a fixed sleeve fixed to the rear of the fixed seat, a driving shaft passing through the center of the fixed sleeve, and a connecting rod handle for controlling the axial extension and retraction of the driving shaft along the fixed sleeve. The rear of the guide sleeve is connected to the driving shaft through the threaded connection kit.

3. The anti-damage automobile door trim buckle rotation locking device according to claim 2, characterized in that: The telescopic assembly further includes a first spring, which surrounds the driving shaft and has two ends respectively abutting against the threaded connection kit and the fixing seat.

4. The anti-damage automobile door trim buckle rotation locking device according to claim 3, characterized in that: The outer sleeve includes a straight tube portion and an expansion portion at the rear of the straight tube portion. A spring receiving chamber is provided at the rear of the expansion portion, and the spring receiving chamber is used to receive the first spring.

5. The anti-damage automobile door trim buckle rotation locking device according to claim 1, characterized in that: The rotating assembly further includes a thrust spherical bearing, and the front portion of the second spring presses the thrust spherical bearing against the rear surface of the flange portion.

6. The anti-damage automobile door trim buckle rotation locking device according to claim 1, characterized in that: A flat head screw is arranged at the rear of the clamping core rod, and the flat head screw is blocked at the rear of the guide sleeve.

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