A headrest plastic part assembly fixture

Abstract

A headrest plastic part assembly fixture includes an upper plate, a lower plate, a first clamping mechanism, a second clamping mechanism, and a cylinder. The upper plate is located above the lower plate, and a support column is provided between the upper and lower plates. The cylinder is mounted on the lower plate with its upper surface facing upwards. The extension rod of the cylinder is connected to a connecting plate, which is horizontally positioned. The first and second clamping mechanisms are symmetrically distributed on the upper plate. By using a single cylinder to drive two clamping mechanisms, the problems of poor synchronization and workpiece damage associated with traditional fixtures are solved.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, and in particular to a fixture for assembling headrest plastic parts. Background Technology

[0002] Plastic parts for automotive headrests typically require multi-point synchronous clamping and positioning. Existing fixtures mostly use independent cylinders to drive the left and right clamping blocks, which has the following drawbacks: asynchronous cylinders cause workpiece skewing; uneven clamping force damages plastic parts; complex structure and high maintenance costs. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a headrest plastic part assembly fixture, which solves the problems of poor synchronization and damage to workpieces caused by traditional fixtures.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a headrest plastic part assembly fixture, including an upper plate, a lower plate, a first clamping mechanism, a second clamping mechanism, and a cylinder; the upper plate is located above the lower plate, and a support column is provided between the upper plate and the lower plate; the cylinder is located on the lower plate and faces upward; the extension rod of the cylinder is connected to a connecting plate, and the connecting plate is horizontally arranged; the first clamping mechanism and the second clamping mechanism are symmetrically distributed on the upper plate; the first clamping mechanism includes a first mounting base, a first slide rail provided on the first mounting base, a first slider that slides with the first slide rail, a first clamping block provided on the first slider, and a second clamping block hinged to the first mounting base. An L-shaped arm is provided, with a first elongated hole at one end and a second elongated hole at the other end. A first clamping block is provided with a first roller extending into the first elongated hole. A connecting plate is provided with a second roller extending into the second elongated hole at one end. The second clamping mechanism includes a second mounting base, a second slide rail provided on the second mounting base, a second slider that slides with the second slide rail, a second clamping block provided on the second slider, and a second L-shaped arm hinged to the second mounting base. A third elongated hole is provided at one end of the second L-shaped arm and a fourth elongated hole at the other end. A third roller extending into the third elongated hole is provided on the second clamping block, and a fourth roller extending into the fourth elongated hole is provided at the other end of the connecting plate. The principle of this invention is as follows: Clamping: The cylinder contracts, causing the connecting plate to descend. The connecting plate simultaneously drives the first L-shaped arm and the second L-shaped arm. The first L-shaped arm on the left rotates clockwise, and the second L-shaped arm on the right rotates counterclockwise, ultimately causing the first clamping block and the second clamping block to move closer to each other towards the center; Releasing: The cylinder opens, causing the connecting plate to rise. The connecting plate simultaneously drives the first L-shaped arm and the second L-shaped arm. The first L-shaped arm on the left rotates counterclockwise, and the second L-shaped arm on the right rotates clockwise, ultimately causing the first clamping block and the second clamping block to move away from each other.

[0005] As an improvement, the bottom ends of both ends of the connecting plate are connected to guide posts, and the guide posts pass through guide holes on the lower plate.

[0006] As an improvement, the first mounting base is provided with a first L-shaped arm on each side, and the two first L-shaped arms are hinged to the first mounting base through a first rotating shaft; the second mounting base is provided with a second L-shaped arm on each side, and the two second L-shaped arms are hinged to the second mounting base through a second rotating shaft.

[0007] As an improvement, the upper plate is provided with a first clearance hole for the first L-shaped arm to extend and a second clearance hole for the second L-shaped arm to extend; the inflection point of the first L-shaped arm is a hinge point, and the inflection point of the second L-shaped arm is a hinge point.

[0008] The beneficial effects of this utility model compared with the prior art are:

[0009] A single cylinder drives the double-sided L-shaped lever to achieve high-precision synchronous clamping and releasing actions between the first and second clamping blocks. Attached Figure Description

[0010] Figure 1 This is a side view of the present invention.

[0011] Figure 2 This is a top view of the present invention. Detailed Implementation

[0012] The present invention will be further described below with reference to the accompanying drawings.

[0013] like Figure 1 , 2As shown, a headrest plastic part assembly fixture includes an upper plate 6, a lower plate 8, a first clamping mechanism 1, a second clamping mechanism 2, and a cylinder 3. The upper plate 6 is located above the lower plate 8, and a support column 7 is provided between the upper plate 6 and the lower plate 8, forming an accommodating space. The cylinder 3 is located on the lower plate 8 and in the middle of the accommodating space, with the cylinder 3 facing upwards. The telescopic rod of the cylinder 3 is connected to a connecting plate 4. The connecting plate 4 is rectangular and horizontally arranged. The cylinder 3 drives the connecting plate 4 to rise and fall. The bottom ends of both ends of the connecting plate 4 are connected to guide columns, and the guide columns pass through guide holes on the lower plate 8. The first clamping mechanism 1 and the second clamping mechanism 2 are symmetrically distributed on the upper plate 6. The first clamping mechanism 1 includes a first mounting base 12, a first slide rail 13 provided on the first mounting base 12, a first slider 14 that slides with the first slide rail 13, a first clamping block 15 provided on the first slider 14, and a first L-shaped arm 11 that is hinged to the first mounting base 12. One end of the first L-shaped arm 11 is provided with a first elongated hole 111, and the other end is provided with a second elongated hole 112. The first clamping block 15 is provided with a first roller 16 that extends into the first elongated hole 111, and one end of the connecting plate 4 is provided with a second roller 17 that extends into the second elongated hole 112. The second clamping mechanism 2 includes a second mounting base 22, a second slide rail 23 mounted on the second mounting base 22, a second slider 24 slidably engaged with the second slide rail 23, a second clamping block 25 mounted on the second slider 24, and a second L-shaped arm 21 hinged to the second mounting base 22. One end of the second L-shaped arm 21 is provided with a third elongated hole 211, and the other end is provided with a fourth elongated hole 212. The second clamping block 25 is provided with a third roller 26 extending into the third elongated hole 211, and the other end of the connecting plate 4 is provided with a fourth roller 26 extending into the fourth elongated hole 212. Roller 27; The first mounting base 12 is provided with first L-shaped arms 11 on both sides, and the two first L-shaped arms 11 are hinged to the first mounting base 12 through a first rotating shaft; The second mounting base 22 is provided with second L-shaped arms 21 on both sides, and the two second L-shaped arms 21 are hinged to the second mounting base 22 through a second rotating shaft; The upper plate 6 is provided with a first clearance hole 61 for the first L-shaped arms 11 to extend and a second clearance hole 62 for the second L-shaped arms 21 to extend; The inflection point of the first L-shaped arm 11 is the hinge point, and the inflection point of the second L-shaped arm 21 is the hinge point.

[0014] The principle of this utility model is as follows: Clamping: The cylinder 3 retracts, causing the connecting plate 4 to descend. The connecting plate 4 simultaneously drives the first L-shaped arm 11 and the second L-shaped arm 21. The first L-shaped arm 11 on the left rotates clockwise, and the second L-shaped arm 21 on the right rotates counterclockwise, ultimately causing the first clamping block 15 and the second clamping block 25 to move closer to each other towards the center; Releasing: The cylinder 3 opens, causing the connecting plate 4 to rise. The connecting plate 4 simultaneously drives the first L-shaped arm 11 and the second L-shaped arm 21. The first L-shaped arm 11 on the left rotates counterclockwise, and the second L-shaped arm 21 on the right rotates clockwise, ultimately causing the first clamping block 15 and the second clamping block 25 to move away from each other.

Claims

1. A headrest plastic part assembly fixture, characterized by: The system includes an upper plate, a lower plate, a first clamping mechanism, a second clamping mechanism, and a cylinder. The upper plate is located above the lower plate, and a support column is provided between the upper and lower plates. The cylinder is mounted on the lower plate and faces upwards. The extension rod of the cylinder is connected to a connecting plate, which is horizontally positioned. The first and second clamping mechanisms are symmetrically distributed on the upper plate. The first clamping mechanism includes a first mounting base, a first slide rail mounted on the first mounting base, a first slider that slides with the first slide rail, a first clamping block mounted on the first slider, and a first L-shaped arm hinged to the first mounting base. One end of the first L-shaped arm is provided with... The first elongated hole has a second elongated hole at one end, and the first clamping block has a first roller extending into the first elongated hole. One end of the connecting plate has a second roller extending into the second elongated hole. The second clamping mechanism includes a second mounting base, a second slide rail on the second mounting base, a second slider that slides with the second slide rail, a second clamping block on the second slider, and a second L-shaped arm hinged to the second mounting base. One end of the second L-shaped arm has a third elongated hole, and the other end has a fourth elongated hole. The second clamping block has a third roller extending into the third elongated hole, and the other end of the connecting plate has a fourth roller extending into the fourth elongated hole.

2. The headrest plastic part assembly fixture of claim 1, wherein: The bottom ends of the connecting plate are connected to guide posts, and the guide posts pass through guide holes on the lower plate.

3. The headrest plastic part assembly fixture of claim 1, wherein: The first mounting base has a first L-shaped arm on each side, and the two first L-shaped arms are hinged to the first mounting base through a first rotating shaft; the second mounting base has a second L-shaped arm on each side, and the two second L-shaped arms are hinged to the second mounting base through a second rotating shaft.

4. The headrest plastic part assembly fixture of claim 1, wherein: The upper plate is provided with a first clearance hole for the first L-shaped arm to extend and a second clearance hole for the second L-shaped arm to extend; the inflection point of the first L-shaped arm is a hinge point, and the inflection point of the second L-shaped arm is a hinge point.

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