A gauge for forming tubes for seat backrests

Abstract

This utility model discloses a fixture for a seat back forming tube. The forming tube has a tubular L-shaped structure. The fixture includes a base plate with a reference block installed on it. The forming tube is clamped and fixed by the reference block and a clamping assembly. Measuring blocks are installed at intervals along the outer side of the forming tube on the base plate. There is a gap between the measuring blocks and the outer wall of the forming tube. The size of the gap is checked by a go / no-go gauge. The fixture also includes a measuring pin vertically located on the bottom and inner side of the forming tube. The measuring pin moves along its own axis. The position of the hole is checked by the movement and alignment of the measuring pin toward the corresponding hole of the forming tube. After the forming tube is positioned and clamped and fixed according to the reference by the reference block and the clamping assembly, the shape of the forming tube can be quickly and conveniently checked by the measuring block and the go / no-go gauge. The position of each hole can be quickly checked by the movement of the measuring pin, thereby realizing the inspection of the forming tube and realizing multi-dimensional inspection in one clamping, which has good practicality.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts inspection tools, and in particular to an inspection tool for seat back forming tubes. Background Technology

[0002] In car seats, the backrest is assembled from pre-shaped tubes to form an overall structural support. Among them, the L-shaped tubes serve as corner connectors and have many structural features such as openings and recesses, all of which have dimensional and geometric tolerance requirements such as position. In order to ensure the smooth assembly of the seat back and the overall reliability of the structural support, it is necessary to perform dimensional inspection on the backrest tubes.

[0003] In existing technologies, different structural features on the formed tube are usually inspected manually using different measuring tools or gauges. This requires moving between different tools and gauges and performing repeated positioning, which is cumbersome, time-consuming, and labor-intensive. Furthermore, the inspection of position and contour also requires the use of coordinate measuring machines, which is very time-consuming and difficult to match with production requirements. Utility Model Content

[0004] To address the aforementioned issues, this application provides a reasonably structured inspection fixture for seat back forming tubes, thereby enabling the inspection of the forming tubes and achieving multi-dimensional inspection in a single clamping operation, demonstrating good practicality.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A fixture for a seat back forming tube, wherein the forming tube is a tubular L-shaped structure, the fixture includes a base plate, a reference block is mounted on the base plate, the forming tube is clamped and fixed by the reference block and a clamping assembly, measuring blocks are installed at intervals along the outer side of the forming tube on the base plate, and a gap is provided between the measuring blocks and the outer wall of the forming tube, the size of the gap is detected by a go / no-go gauge; it also includes a measuring pin vertically located on the bottom and inner side of the forming tube, the measuring pin moves along its own axis, and the position of the hole is detected by the movement and fitting of the measuring pin toward the corresponding hole of the forming tube.

[0007] As a further improvement to the above technical solution:

[0008] The reference block has an L-shaped structure, and the pressing assembly presses and adheres the forming tube to the inner surface of the L-shaped structure of the reference block; the reference block includes positioning reference blocks spaced along one arm of the forming tube, and a support block located at the end of the other arm of the forming tube.

[0009] The pressing assembly includes a downward pressing assembly that applies force downward toward the forming tube, and a side pressing assembly located inside the forming tube that applies force laterally toward the forming tube; the downward pressing assembly and the side pressing assembly are respectively arranged one-to-one with the reference block.

[0010] The inner side of the support block has a protruding post that fits into the forming tube.

[0011] The measuring block includes an inwardly concave arc-shaped plate located on the outer side of the corner of the forming tube, and measuring block one and measuring block two located on the outer side of the middle of the two arms of the forming tube.

[0012] The measuring pin located on the bottom surface of the forming tube is an L-shaped measuring pin, with the vertical arm of the L-shaped measuring pin facing the bottom hole on the bottom surface of the forming tube; the L-shaped measuring pin is slidably mounted on the support, forming the hole measuring assembly; the support has an L-shaped hole for fitting the L-shaped measuring pin, the vertical part of the L-shaped hole is slidably fitted with the vertical arm of the L-shaped measuring pin via a bushing, and the horizontal part of the L-shaped hole is set as a through hole with a vertical elongated cross-section.

[0013] The measuring pin located on the inner side of the forming tube is a horizontally arranged shaft pin, which faces the side hole of the forming tube. The shaft pin is horizontally slidably installed on the support two, forming the hole measuring component two. A handle is installed on the end of the shaft pin away from the forming tube. An elastic element is fitted on the shaft pin located between the support two and the handle. The elastic element drives the shaft pin away from the forming tube.

[0014] It also includes a T-shaped handheld auxiliary block, with a handle installed at the large end of the handheld auxiliary block and the small end of the handheld auxiliary block attached to the inner plane of the side concave structure of the forming tube; the large end of the handheld auxiliary block and the outer wall of the forming tube form a gap, which is detected by a go / no-go gauge.

[0015] It also includes contour blocks located outside the two ends of the forming tube. The contour blocks are fixedly installed on the base plate. There is a gap between the contour surface of the contour block and the end notch of the forming tube. The size of the gap is checked by a go / no-go gauge.

[0016] It also includes a concave measuring assembly located inside the forming tube, in which a slider moves horizontally toward the concave structure of the forming tube.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] After the forming tube is positioned and clamped according to the reference by the reference block and the clamping component, the shape of the forming tube can be quickly and conveniently inspected by the measuring block and the go / no-go gauge. By moving the measuring pin, the position of each hole can be quickly inspected one by one, thereby realizing the inspection of the forming tube. It also realizes multi-dimensional inspection in one clamping, which has good practicality. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the formed tube of this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of the inspection tool of this utility model.

[0021] Figure 3 This is a schematic diagram showing the state of the formed tube of this utility model being clamped on the inspection fixture during inspection.

[0022] Figure 4 This is a cross-sectional view of the hole measuring component of this utility model.

[0023] Figure 5 This is a cross-sectional view of the second hole measuring component of this utility model.

[0024] Figure 6 This is a schematic diagram illustrating the use of a handheld auxiliary block to inspect the concave structure on the upper side of the formed tube according to this utility model.

[0025] The components include: 1. Base plate; 2. Concave arc plate; 3. Concave measuring component; 4. Pressing component; 5. Positioning reference block; 6. Side pressing component; 7. Hole measuring component one; 8. Hole measuring component two; 9. Contouring block; 10. Forming tube; 11. Concave structure; 12. Side concave structure; 13. Bottom hole; 14. Side hole; 15. Notch; 20. Handheld auxiliary block; 30. Handle;

[0026] 21. Measuring block one; 22. Measuring block two;

[0027] 51. Support block;

[0028] 71. Support 1; 72. L-shaped measuring pin; 73. Bushing; 711. Vertical elongated hole;

[0029] 81. Support 2; 82. Shaft pin; 83. Elastic element. Detailed Implementation

[0030] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0031] like Figure 1 As shown, the forming tube 10 has a tubular L-shaped structure with multiple side holes 14 spaced apart on its inner side and multiple bottom holes 13 spaced apart on its bottom surface. A recessed structure 11 is provided on the upper part of one arm of the forming tube 10, and the bottom edge of the arm is recessed to form a side recessed structure 12. The two ends of the forming tube 10 are recessed to form recesses 15 of different shapes. In actual assembly, in order to ensure smooth assembly of the forming tube 10 with external objects, it is necessary not only to check the dimensions of the forming tube 10 such as length, width, and height, but also to check the position of the side holes 14, bottom holes 13, and recessed structure 11, check the depth of the side recessed structure 12, and check the surface contour of the recesses 15 at both ends.

[0032] like Figure 2 and Figure 3As shown, this embodiment provides a fixture for a seat back forming tube. The fixture includes a base plate 1, on which a reference block is mounted. The reference block, in conjunction with a clamping assembly, clamps and fixes the forming tube 10. Measuring blocks are spaced along the outer side of the forming tube 10 on the base plate 1. A gap is provided between the measuring blocks and the outer wall of the forming tube 10. A go / no-go gauge is used to detect the size of the gap. The fixture also includes a measuring pin that is perpendicular to the bottom and inner side of the forming tube 10. The measuring pin moves along its own axial direction. The position of the hole is detected by the movement and fitting of the measuring pin toward the corresponding hole of the forming tube 10.

[0033] In this embodiment, after the forming tube 10 is positioned and clamped according to the reference by the reference block and the clamping component, the shape of the forming tube 10 can be quickly and conveniently detected by the measuring block combined with the go / no-go gauge. By moving the measuring pin, the position of each hole can be quickly detected one by one.

[0034] The reference block has an L-shaped structure, and the pressing assembly presses and adheres the forming tube 10 toward the inner surface of the L-shaped structure of the reference block. The reference block includes positioning reference blocks 5 arranged at intervals along one arm of the forming tube 10, and a support block 51 located at the end of the other arm of the forming tube 10.

[0035] In this embodiment, the positioning reference block 5 and the support block 51 arranged at intervals on one arm of the forming tube 10 are used to support and attach the bottom surface of the forming tube 10 to the positioning reference block 5 and the support block 51, attach the outer wall surface of one arm of the forming tube 10 to the inner side surface of the positioning reference block 5, and attach the outer wall surface of the other arm of the forming tube 10 to the inner side surface of the support block 51, thereby achieving complete positioning of the forming tube 10 and clamping and fixing it by the pressing assembly.

[0036] The pressing assembly includes a downward pressing assembly 4 that applies force downward toward the forming tube 10, and a side pressing assembly 6 located inside the forming tube 10 that applies force laterally toward the forming tube 10; the downward pressing assembly 4 and the side pressing assembly 6 are respectively arranged one-to-one with the reference block, effectively ensuring the fixation of the forming tube 10.

[0037] In this embodiment, the pressing component 4 and the side pressing component 6 respectively ensure the corresponding support, and the quick clamp installed on the support realizes the pressing of the corresponding position of the forming tube 10 by the quick clamp.

[0038] In this embodiment, the quick clamp is a purchased standard part that can be manually pressed and released to press and fix the forming tube 10 at a preset position.

[0039] The inner side of the support block 51 has a protruding post extending outward, which is attached to the forming tube 10.

[0040] In this embodiment, the protruding post effectively reduces the contact area between the forming tube 10 and the support block 51. The protruding post makes contact with and fits the side of the forming tube 10, effectively ensuring that the forming tube 10 is reliably and stably fitted and limited in this direction.

[0041] The measuring blocks include an inwardly concave arc plate 2 located on the outer side of the corner of the forming tube 10, and measuring block 21 and measuring block 22 located on the outer side of the middle of the two arms of the forming tube 10.

[0042] In this embodiment, after the forming tube 10 is clamped and fixed by the reference block and the pressing assembly, a gap is formed between the outer wall surface of the forming tube 10 and the measuring blocks, including the concave arc plate 2, measuring block 1 21, and measuring block 22. A go / no-go gauge with one thick end and one thin end is inserted into the gap and moved along the forming tube 10 to inspect and judge the shape of the forming tube 10. The thin end of the go / no-go gauge is the go gauge, and the thick end is the no-go gauge. If the thin end of the go / no-go gauge can move smoothly within the gap, and the thick end cannot be inserted into the gap, then the shape is deemed acceptable.

[0043] The measuring pin located on the bottom surface of the forming tube 10 is an L-shaped measuring pin 72, with the vertical arm of the L-shaped measuring pin 72 directly opposite the bottom hole 13 on the bottom surface of the forming tube 10; for example Figure 4 As shown, the L-shaped measuring pin 72 is slidably mounted on the support 71 to form the hole measuring assembly 7. The support 71 has an L-shaped hole for the L-shaped measuring pin 72 to be fitted. The vertical part of the L-shaped hole is slidably fitted with the vertical arm of the L-shaped measuring pin 72 via the bushing 73. The horizontal part of the L-shaped hole is set as a through hole with a vertical elongated hole 711 in cross section.

[0044] In actual use, force is applied to the horizontal part of the L-shaped measuring pin 72 to drive the vertical part to move up and down; the qualification of the corresponding bottom hole 13 is judged by whether the vertical part can extend upward into the corresponding bottom hole 13 and the smoothness of the relative movement.

[0045] In this embodiment, the horizontal and vertical parts of the L-shaped measuring pin 72 are independent pins. The inner end of the horizontal part is threaded and fitted to the bottom end of the vertical part to form the L-shaped measuring pin 72.

[0046] The measuring pin located on the inner side of the forming tube 10 is a horizontally arranged shaft pin 82, which is directly opposite the side hole 14 of the forming tube 10. Figure 5 As shown, the shaft pin 82 is horizontally slidably mounted on the support 81 to form the hole measuring component 8; a handle is installed at the end of the shaft pin 82 away from the forming tube 10, and an elastic element 83 is fitted on the shaft pin 82 located between the support 81 and the handle. The elastic element 83 drives the shaft pin 82 away from the forming tube 10.

[0047] In this embodiment, when in use, force is applied to the handle, causing the pin 82 to overcome the elastic force of the elastic element 83 and move toward the corresponding side hole 14 on the forming tube 10. The smoothness of the pin 82 extending into the side hole 14 and whether it can extend into the side hole 14 are used to determine whether the side hole 14 is qualified.

[0048] like Figure 6 As shown, it also includes a T-shaped handheld auxiliary block 20. A handle 30 is installed at the large end of the handheld auxiliary block 20, and the small end of the handheld auxiliary block 20 is attached to the inner plane of the side concave structure 12 of the forming tube 10. A gap is formed between the large end of the handheld auxiliary block 20 and the outer wall of the forming tube 10, which is detected by a go / no-go gauge.

[0049] In actual operation, since the side concave structure 12 is located at the lower part of the forming tube 10 with its side facing downward after the forming tube 10 is clamped on the fixture, the forming tube 10 can be removed from the fixture and placed on a flat surface with its bottom surface facing upward. Then, the handheld auxiliary block 20 is attached to the side concave structure 12 of the forming tube 10, and a go / no-go gauge is used to check the gap a. If the thin end of the go / no-go gauge can move smoothly within the gap a, and the thick end cannot extend into the gap a, it is judged to be qualified. This effectively switches the detection of the depth of the side concave structure 12 to the detection of whether the gap a is qualified, which is convenient for daily inspection operations.

[0050] It also includes contour blocks 9 located outside the two ends of the forming tube 10. The contour blocks 9 are fixedly installed on the base plate 1. There is a gap between the contour surface of the contour block 9 and the end notch 15 of the forming tube 10. The size of the gap is checked by a go / no-go gauge. If the small end of the go / no-go gauge can move smoothly within the gap and the large end cannot be inserted into the gap, it is judged to be qualified.

[0051] It also includes a concave measuring component 3 located inside the forming tube 10. The slider in the concave measuring component 3 moves horizontally toward the concave structure 11 of the forming tube 10. If the slider can be smoothly slid and fitted to the concave structure 11, the position of the concave structure 11 is qualified.

[0052] In this embodiment, the slider is slidably mounted on the corresponding support; in actual operation, an elastomer can be fitted on the slider and the support according to actual needs.

[0053] The method of using this utility model is as follows:

[0054] The forming tube 10 is placed on the reference block, and the pressing component 4 and the side pressing component 6 apply pressure to the forming tube 10 respectively, so that the outer side and bottom surface of the forming tube 10 are in contact with the inner surface of the reference block, and the forming tube 10 is fixed.

[0055] Using the corresponding go / no-go gauges, the gap between the measuring block and the forming tube 10, and the gap between the contour block 9 and the end face of the forming tube 10 are checked one by one for go / no-go. Force is applied to the L-shaped measuring pin 72 in the hole measuring assembly 1 and the shaft pin 82 in the hole measuring assembly 2, so that they extend into the corresponding bottom hole 13 or side hole 14 to check the corresponding hole. Force is applied to the slider in the concave measuring assembly 3 to move it toward the concave structure 11 of the forming tube 10 to check the concave structure 11. The forming tube 10 is removed and placed on a flat surface. Using the hand auxiliary block 20 and the corresponding go / no-go gauges, the upper side concave structure 12 of the forming tube 10 is checked.

[0056] This invention enables the inspection of formed tubes and the multi-dimensional inspection in a single clamping process. It is convenient, fast, and can be matched with the production schedule, making it highly practical.

[0057] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0058] The above description is an explanation of the present utility model and not a limitation thereof. The scope of the present utility model is defined by the claims. Within the protection scope of the present utility model, any form of modification may be made.

Claims

1. A fixture for a seat back forming tube, the forming tube (10) being a tubular L-shaped structure, the fixture comprising a base plate (1), characterized in that: A reference block is installed on the base plate (1). The reference block and the pressing assembly clamp and fix the forming tube (10). Measuring blocks are installed at intervals along the outer side of the forming tube (10) on the base plate (1). There is a gap between the measuring block and the outer wall of the forming tube (10). The size of the gap is detected by a go / no-go gauge. It also includes a measuring pin that is vertically located on the bottom and inner side of the forming tube (10). The measuring pin moves along its own axis. The position of the hole is detected by the movement and fitting of the measuring pin toward the corresponding hole of the forming tube (10).

2. The inspection fixture for a seat back forming tube as described in claim 1, characterized in that: The reference block has an L-shaped structure, and the pressing assembly presses the forming tube (10) against the inner surface of the L-shaped structure of the reference block; the reference block includes positioning reference blocks (5) spaced along one arm of the forming tube (10), and a support block (51) located at the end of the other arm of the forming tube (10).

3. The inspection fixture for a seat back forming tube as described in claim 2, characterized in that: The pressing assembly includes a downward pressing assembly (4) that applies downward force toward the forming tube (10), and a side pressing assembly (6) that applies lateral force toward the forming tube (10) from the inside of the forming tube (10); the downward pressing assembly (4) and the side pressing assembly (6) are respectively arranged in correspondence with the reference block.

4. The inspection fixture for a seat back forming tube as described in claim 2, characterized in that: The inner side of the support block (51) has a protruding post extending outward, which is attached to the forming tube (10).

5. The inspection fixture for a seat back forming tube as described in claim 1, characterized in that: The measuring blocks include an inwardly concave arc plate (2) located on the outer side of the corner of the forming tube (10), and measuring block one (21) and measuring block two (22) located on the outer side of the middle of the two arms of the forming tube (10).

6. The inspection fixture for a seat back forming tube as described in claim 1, characterized in that: The measuring pin located on the bottom surface of the forming tube (10) is an L-shaped measuring pin (72), and the vertical arm of the L-shaped measuring pin (72) is directly opposite the bottom hole (13) on the bottom surface of the forming tube (10). The L-shaped measuring pin (72) is slidably mounted on the support (71) to form a hole measuring assembly (7). The support (71) has an L-shaped hole for fitting the L-shaped measuring pin (72). The vertical part of the L-shaped hole is slidably fitted with the vertical arm of the L-shaped measuring pin (72) via a bushing (73). The horizontal part of the L-shaped hole is set as a through hole with a vertical elongated hole (711) in cross section.

7. The inspection fixture for a seat back forming tube as described in claim 1, characterized in that: The measuring pin located on the inner side of the forming tube (10) is a horizontally arranged shaft pin (82). The shaft pin (82) is directly opposite the side hole (14) of the forming tube (10). The shaft pin (82) is horizontally slidably installed on the support second (81) to form the hole measuring component second (8). A handle is installed at the end of the shaft pin (82) away from the forming tube (10). An elastic element (83) is fitted on the shaft pin (82) located between the support second (81) and the handle. The elastic element (83) drives the shaft pin (82) away from the forming tube (10).

8. A gauge for forming a seat back tube as described in claim 1, characterized in that: It also includes a T-shaped handheld auxiliary block (20), with a handle (30) installed at the large end of the handheld auxiliary block (20) and the small end of the handheld auxiliary block (20) attached to the inner plane of the side concave structure (12) of the forming tube (10); the large end of the handheld auxiliary block (20) and the outer wall of the forming tube (10) form a gap, which is detected by a go / no-go gauge.

9. A gauge for forming a seat back tube as described in claim 1, characterized in that: It also includes contour blocks (9) located outside the two ends of the forming tube (10). The contour blocks (9) are fixedly installed on the base plate (1). There is a gap between the contour surface of the contour block (9) and the end notch (15) of the forming tube (10). The size of the gap is checked by a go / no-go gauge.

10. A gauge for forming a seat back tube as described in claim 1, characterized in that: It also includes a recess measuring assembly (3) located inside the forming tube (10), and the slider in the recess measuring assembly (3) moves horizontally toward the recessed structure (11) of the forming tube (10).

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