A detection mechanism for a chassis subframe

Abstract

The utility model provides a kind of detection mechanism for chassis auxiliary frame, by the first datum block and the second datum block of first floating mechanism component and second floating mechanism component are slid to the Z direction datum positioning of first cylinder component and second cylinder component position, so that auxiliary frame is adhered with four datum surfaces, and then in the case where auxiliary frame is not inverted, design datum, detection datum and assembly datum are unified.

Description

Technical Field

[0001] This utility model relates to the field of automotive chassis subframe inspection tools, specifically to an inspection mechanism for chassis subframes. Background Technology

[0002] When inspecting existing automotive chassis subframes, the subframe is usually placed upside down on the fixture, resulting in the Z-axis positioning reference being located at the lower end of the subframe. However, during the vehicle assembly process, the installation reference for both the subframe and the vehicle body is the upper end of the subframe, and components such as steering gears and stabilizer bars assembled with the subframe also use the upper end face as the assembly reference.

[0003] The above design results in inconsistencies between design datum, inspection datum, and assembly datum. Utility Model Content

[0004] The purpose of this utility model is to design a mechanism that can ensure the consistency of design benchmarks, testing benchmarks and assembly benchmarks, while also facilitating worker operation on the subframe inspection fixture.

[0005] This utility model provides a testing mechanism for a chassis subframe. The chassis subframe includes a subframe crossbeam, a front crossbeam bend located at the front end of the subframe crossbeam, and a rear crossbeam bend located at the rear end of the subframe crossbeam. The chassis subframe is placed on the testing mechanism with the front and rear crossbeam bends facing upwards. The testing mechanism includes:

[0006] Inspection fixture base plate 5 is located directly below the chassis subframe; The first cylinder assembly 1, the first floating mechanism assembly 3, and the second floating mechanism assembly 4 are connected to the inspection fixture base plate 5 and symmetrically arranged at the front and rear ends of the chassis subframe. The first cylinder assembly 1 includes: a first positioning bracket 11 connected to the inspection base plate 5, a first cylinder 12 connected to the first positioning bracket 11, a first cylinder guide rod 13 built into the first cylinder 12, and a first support block 14 connected to the first cylinder guide rod 13 and used to support the subframe crossbeam. The first floating mechanism assembly 3 includes: a first I-shaped positioning base plate 31 connected to the inspection base plate 5, a first guide rail 34 placed on the first I-shaped positioning base plate 31, a first slide rail 35 set on the first guide rail 34, a first positioning block 36 and a first slide rail fixing plate 37 connected to the first slide rail 35, a first positioning pin 38 built into the first slide rail fixing plate 37, a first suspension assembly passing through the first positioning pin 38, and a first reference block 313 provided on the side of the first suspension assembly near the top of the subframe crossbeam; The second floating mechanism assembly 4 includes: a second I-shaped positioning base plate 41 connected to the fixture base plate 5, a second guide rail 44 placed on the second I-shaped positioning base plate 41, a second slide rail 46 set on the second guide rail 44, a second positioning block 45 and a second slide rail fixing plate 47 connected to the second slide rail 46, a second positioning pin 48 built into the second slide rail fixing plate 47, a second suspension assembly passing through the second positioning pin 48, and a second reference block 415 provided on the side of the second suspension assembly near the bending part of the crossbeam and above the bending part of the rear crossbeam; And a second cylinder assembly 2 symmetrically disposed between the first floating mechanism assembly 3 and the second floating mechanism assembly 4; The second cylinder assembly 2 includes: a second support block 24 located above the front and rear ends of the subframe crossbeam; a second cylinder guide rod 23 connected to the second support block 24; the second cylinder guide rod 23 located inside the second cylinder 22; and a second positioning bracket 21 connected to the second cylinder 22; the second positioning bracket 21 located above the curved portion of the front crossbeam and the curved portion of the rear crossbeam. The first slide rail 35 slides on the first guide rail 34, causing the first reference block 313 to be positioned directly above the first support block 14. The first positioning pin 38 is placed in the positioning hole of the first positioning block 36. The first cylinder 12 drives the first cylinder guide rod 13 to push the subframe crossbeam supported by the first support block 14 upward to the first reference block 313. The second slide rail 46 slides on the second guide rail 44, causing the second reference block 415 to be positioned directly above the second support block 24 and above the curved part of the crossbeam and the curved part of the rear crossbeam. The second positioning pin 48 is placed in the positioning hole of the second positioning block 45. The second cylinder 22 drives the second cylinder guide rod 23 until the upper part of the curved part of the front crossbeam and the curved part of the rear crossbeam is pushed to the second reference block 415.

[0007] Preferably, the first I-shaped positioning base plate 31 has a first guide rail front fixing block 314 at one end near the subframe crossbeam and a first guide rail rear fixing block 33 at the other end away from the subframe crossbeam.

[0008] Preferably, the first guide rail 34 has a first front limiting block 315 connected to the upper part of the first I-shaped positioning base plate 31 at one end near the front fixing block 314 of the first guide rail, and a first rear limiting block 32 connected to the upper part of the first I-shaped positioning base plate 31 at one end near the rear fixing block 33 of the first guide rail.

[0009] Preferably, the first suspension assembly includes: a first L-shaped connecting plate 310 connected to the first slide rail fixing plate 37, a first L-shaped block 311 connected to the first L-shaped connecting plate 310, and a first reference fixing plate 312 connected to the first L-shaped block 311 and the first reference block 313; the second suspension assembly includes: a second L-shaped connecting plate 410 connected to the second slide rail fixing plate 47, a second L-shaped block 413 connected to the second L-shaped connecting plate 410, and a second reference fixing plate 416 connected to the second L-shaped block 413 and the second reference block 415.

[0010] Preferably, a first reinforcing plate 39 is welded inside the first L-shaped connecting plate 310, a second reinforcing plate 49 is welded inside the second L-shaped connecting plate 410, and a third reinforcing plate 414 is welded inside the second L-shaped block 413.

[0011] Preferably, the height of the second positioning bracket 21 is greater than that of the first positioning bracket 11.

[0012] Preferably, the length of the second I-shaped positioning base plate 41 is less than that of the first I-shaped positioning base plate 31.

[0013] Preferably, the height of the second I-shaped positioning base plate 41 is greater than that of the first I-shaped positioning base plate 31.

[0014] This utility model proposes a testing mechanism for a chassis subframe. By sliding the first reference block and the second reference block of the first floating mechanism assembly and the second floating mechanism assembly to the positions of the first cylinder assembly and the second cylinder assembly for Z-axis reference positioning, the subframe is made to fit with four reference surfaces, thereby achieving the unification of design reference, testing reference and assembly reference without inverting the subframe. Attached Figure Description

[0015] Figure 1 A schematic diagram of the overall structure of a detection mechanism for a chassis subframe provided in an embodiment of this utility model; Figure 2 A schematic diagram of the first cylinder assembly structure of a detection mechanism for a chassis subframe provided in an embodiment of this utility model; Figure 3 A schematic diagram of the second cylinder assembly structure of a detection mechanism for a chassis subframe provided in an embodiment of this utility model; Figure 4 A schematic diagram of the first floating mechanism component structure of a detection mechanism for a chassis subframe provided in an embodiment of this utility model; Figure 5 A schematic diagram of the second floating mechanism component structure for a detection mechanism of a chassis subframe provided in an embodiment of this utility model; Figure label: 1-First cylinder assembly; 11-First positioning bracket; 12-First cylinder; 13-First cylinder guide rod; 14 - First support block; 2-Second cylinder assembly; 21-Second positioning bracket; 22-Second cylinder; 23-Second cylinder guide rod; 24-Second support block; 3-First floating mechanism assembly; 31-First I-shaped positioning base plate; 32-First rear limit block; 33-First guide rail rear fixing block; 34-First guide rail; 35-First slide rail; 36-First positioning block; 37-First slide rail fixing plate; 38-First positioning pin; 39-First reinforcing plate; 310-First L-shaped connecting plate; 311-First L-shaped block; 312-First reference fixing plate; 313-First reference block; 314-First guide rail front fixing block; 315-First front limit block; 4-Second floating mechanism assembly; 41-Second I-shaped positioning base plate; 42-Second rear limit block; 43-Second guide rail rear fixing block; 44-Second guide rail; 45-Second positioning block; 46-Second slide rail; 47-Second slide rail fixing plate; 48-Second positioning pin; 49-Second reinforcing plate; 410-Second L-shaped connecting plate; 411-Second front limit block; 412-Second guide rail front fixing block; 413-Second L-shaped block; 414-Third reinforcing plate; 415-Second reference block; 416-Second reference fixing plate; 5-Inspection fixture base plate. Detailed Implementation

[0016] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0017] This utility model provides a testing mechanism for a chassis subframe. The chassis subframe includes a subframe crossbeam, a front crossbeam bend located at the front end of the subframe crossbeam, and a rear crossbeam bend located at the rear end of the subframe crossbeam. The chassis subframe is placed on the testing mechanism with the front and rear crossbeam bends facing upwards.

[0018] like Figure 1As shown, the testing mechanism includes: a fixture base plate 5 located directly below the chassis subframe; a first cylinder assembly 1, a first floating mechanism assembly 3, and a second floating mechanism assembly 4 connected to the fixture base plate 5 and symmetrically arranged at the front and rear ends of the chassis subframe; and a second cylinder assembly 2 symmetrically arranged between the first floating mechanism assembly 3 and the second floating mechanism assembly 4.

[0019] The first cylinder assembly 1 includes: a first positioning bracket 11, a first cylinder 12, a first cylinder guide rod 13, and a first support block 14.

[0020] like Figure 2 As shown, the first positioning bracket 11 is bolted to the inspection base plate 5 and the first cylinder 12 respectively. The first cylinder 12 is provided with a first cylinder guide rod 13. The first cylinder guide rod 13 is connected to one end of the first support block 14. The other end of the first support block 14 is located below the front and rear ends of the subframe crossbeam.

[0021] The second cylinder assembly 2 includes: a second positioning bracket 21, a second cylinder 22, a second cylinder guide rod 23, and a second support block 24.

[0022] like Figure 3 As shown, one end of the second support block 24 is located above the front and rear ends of the subframe crossbeam, and the other end of the second support block 24 is connected to one end of the second cylinder guide rod 23. The other end of the second cylinder guide rod 23 is located inside the second cylinder 22. The second cylinder 22 is fixedly connected to the second positioning bracket 21 by bolts. The second positioning bracket 21 is located above the curved part of the front crossbeam and the curved part of the rear crossbeam.

[0023] Preferably, the height of the second positioning bracket 21 is greater than that of the first positioning bracket 11.

[0024] The first floating mechanism component 3 includes: a first I-shaped positioning base plate 31, a first rear limiting block 32, a first guide rail rear fixing block 33, a first guide rail 34, a first slide rail 35, a first positioning block 36, a first slide rail fixing plate 37, a first positioning pin 38, a first reinforcing plate 39, a first L-shaped connecting plate 310, a first L-shaped block 311, a first reference fixing plate 312, a first reference block 313, a first guide rail front fixing block 314, and a first front limiting block 315.

[0025] like Figure 4 As shown, the lower part of the first I-type positioning base plate 31 is connected to the inspection base plate 5 by bolts. The upper part of the first I-type positioning base plate 31 is provided with a first guide rail front fixing block 314 at one end near the sub-frame crossbeam and a first guide rail rear fixing block 33 at the other end away from the sub-frame crossbeam.

[0026] A first guide rail 34 is provided between the first guide rail front fixing block 314 and the first guide rail rear fixing block 33. A first front limiting block 315 is provided on the first guide rail 34 near the first guide rail front fixing block 314 and is connected to the upper part of the first I-shaped positioning base plate 31 by bolts. A first rear limiting block 32 is provided on the first guide rail near the first guide rail rear fixing block 33 and is connected to the upper part of the first I-shaped positioning base plate 31 by bolts. A first slide rail 35 is provided between the first front limiting block 315 and the first rear limiting block 32. The first slide rail 35 is mounted on the first guide rail 34 through a dovetail groove to prevent the first slide rail 35 from slipping off the first guide rail 34.

[0027] The first positioning block 36 is located on one side of the first front limiting block 315 and is connected to the first I-shaped positioning base plate 31 by bolts. At the location of the first positioning block 36, one side of the first slide rail fixing plate 37 is connected to the first slide rail 35 by bolts. The other side of the first slide rail fixing plate 37 is press-fitted with a first positioning pin 38. The first positioning pin 38 can be pressed into the first positioning hole in the first positioning block 36. The first slide rail fixing plate 37 is connected to the outer bottom end of the first L-shaped connecting plate 310 by bolts. The outer side of the first L-shaped connecting plate 310 is connected to the side of the first L-shaped block 311 by bolts. The first reinforcing plate 39 is welded inside the first L-shaped connecting plate 310.

[0028] The inner side of the upper end of the first L-shaped block 311 is connected to the first reference fixing plate 312 by bolts, and the first reference fixing plate 312 is connected to the first reference block 313 by bolts.

[0029] The second floating mechanism assembly 4 includes: a second positioning base plate 41, a second rear limiting block 42, a second guide rail rear fixing block 43, a second guide rail 44, a second positioning block 45, a second slide rail 46, a second slide rail fixing plate 47, a second positioning pin 48, a second reinforcing plate 49, a second L-shaped connecting plate 410, a second front limiting block 411, a second guide rail front fixing block 412, a second L-shaped block 413, a third reinforcing plate 414, a second reference block 415, and a second reference fixing plate 416.

[0030] like Figure 5 As shown, the lower part of the second I-type positioning base plate 41 is connected to the inspection base plate 5 by bolts. The upper part of the second I-type positioning base plate 41 is provided with a second guide rail front fixing block 412 at one end near the sub-frame crossbeam and a second guide rail rear fixing block 43 at the other end away from the sub-frame crossbeam.

[0031] A second guide rail 44 is provided between the second guide rail front fixing block 412 and the second guide rail rear fixing block 43. A second front limiting block 411 is provided on the second guide rail 44 near the second guide rail front fixing block 412 and is connected to the upper part of the second I-shaped positioning base plate 41 by bolts. A second rear limiting block 42 is provided on the second guide rail near the second guide rail rear fixing block 43 and is connected to the upper part of the second I-shaped positioning base plate 41 by bolts. A second slide rail 46 is provided between the second front limiting block 411 and the second rear limiting block 42. The second slide rail 46 is mounted on the second guide rail 44 through a dovetail groove to prevent the second slide rail 46 from slipping off the second guide rail 44.

[0032] The second positioning block 45 is located on one side of the second front limit block 411 and is connected to the second I-shaped positioning base plate 41 by bolts. At the location of the second positioning block 45, one side of the second slide rail fixing plate 47 is connected to the second slide rail 46 by bolts. The other side of the second slide rail fixing plate 47 is press-fitted with a second positioning pin 48. The second positioning pin 48 can be pressed into the first positioning hole in the second positioning block 45. The second slide rail fixing plate 47 is connected to the outer bottom end of the second L-shaped connecting plate 410 by bolts. The outer side of the second L-shaped connecting plate 410 is connected to the outer side of the second L-shaped block 413 by bolts. A second reinforcing plate 49 is welded inside the second L-shaped connecting plate 410.

[0033] The inner side of the upper end of the second L-shaped block 413 is connected to the second reference fixing plate 416 by bolts. The second reference fixing plate 416 is connected to the second reference block 415 by bolts. A third reinforcing plate 414 is welded inside the second L-shaped block 413.

[0034] In use, with the front and rear crossbeam bends facing upwards, the chassis subframe is placed on the first support block 14 in the first cylinder assembly 1 and below the second support block 24 in the second cylinder assembly 2. The first reference block 313 is positioned directly above the first support block 14 and above the chassis subframe by sliding along the second guide rail 34 via the first slide rail 35. The first floating mechanism assembly 3 is locked by the first positioning pin 38. The second reference block 415 is positioned directly above the second support block 24 and above the crossbeam bends and the rear crossbeam bends by sliding along the second guide rail 44 via the second slide rail 46. The second floating mechanism assembly 4 is locked by the second positioning pin 48.

[0035] Open the valves of the first cylinder 1 and the second cylinder 2 in the first cylinder assembly 1 and the second cylinder assembly 2. The first cylinder guide rod 13 pushes the first support block 14 until the upper part of the subframe crossbeam resists the first reference block of the first floating mechanism. The second cylinder guide rod 23 pushes the second support block 24 until the upper part of the front crossbeam bend and the rear crossbeam bend resists the second reference block 415 of the second floating mechanism 4, so as to realize that the detection reference is the Z-direction positioning reference.

[0036] After the inspection is completed, the first floating mechanism 3 and the second floating mechanism 4 are pushed to the outside of the chassis subframe, the air valves of the first cylinder 1 and the second cylinder 2 are opened, and the chassis subframe is removed.

[0037] Preferably, the length of the second I-shaped positioning base plate 41 is less than that of the first I-shaped positioning base plate 31, and the height of the second I-shaped positioning base plate 41 is greater than that of the first I-shaped positioning base plate 31.

[0038] During testing, the sample is placed behind the support block, the floating mechanism is pushed to the upper end of the subframe, the positioning pin is pressed, and the cylinder is clamped. The cylinder then pushes the subframe upwards until it is in contact with the four reference surfaces to achieve Z-axis positioning before testing. After testing, the cylinder is opened, the floating mechanism is pushed to the outside of the subframe, and the sample is removed.

[0039] This utility model features a simple and easy-to-operate structural design, effectively avoiding the problem of inconsistent design, inspection, and assembly standards caused by inspection issues. It also avoids the problem of traditional designs where the subframe is inverted on the inspection fixture, with a large number of inspection surfaces on the upper end of the subframe located at the lower end, making it difficult for inspection personnel to operate.

Claims

1. A testing mechanism for a chassis subframe, characterized in that, The chassis subframe includes a subframe crossbeam, a front crossbeam bend located at the front end of the subframe crossbeam, and a rear crossbeam bend located at the rear end of the subframe crossbeam. The chassis subframe is placed on a testing mechanism with the front and rear crossbeam bends facing upwards. The testing mechanism includes: The inspection fixture base plate is located directly below the chassis subframe; The first cylinder assembly, the first floating mechanism assembly, and the second floating mechanism assembly are connected to the base plate of the inspection fixture and symmetrically arranged at the front and rear ends of the chassis subframe. The first cylinder assembly includes: a first positioning bracket connected to the fixture base plate, a first cylinder connected to the first positioning bracket, a first cylinder guide rod built into the first cylinder, and a first support block connected to the first cylinder guide rod and used to support the subframe crossbeam. The first floating mechanism assembly includes: a first I-shaped positioning base plate connected to the fixture base plate, a first guide rail placed on the first I-shaped positioning base plate, a first slide rail set on the first guide rail, a first positioning block and a first slide rail fixing plate connected to the first slide rail, a first positioning pin built into the first slide rail fixing plate, a first suspension assembly passing through the first positioning pin, and a first reference block provided on the side of the first suspension assembly near the top of the subframe crossbeam. The second floating mechanism assembly includes: a second I-shaped positioning base plate connected to the fixture base plate, a second guide rail placed on the second I-shaped positioning base plate, a second slide rail set on the second guide rail, a second positioning block and a second slide rail fixing plate connected to the second slide rail, a second positioning pin built into the second slide rail fixing plate, a second suspension assembly passing through the second positioning pin, and a second reference block provided on the side of the second suspension assembly near the curved part of the crossbeam and above the curved part of the rear crossbeam. And a second cylinder assembly symmetrically disposed between the first floating mechanism assembly and the second floating mechanism assembly; The second cylinder assembly includes: a second support block located above the front and rear ends of the subframe crossbeam; a second cylinder guide rod connected to the second support block; the second cylinder guide rod located inside the second cylinder; and a second positioning bracket connected to the second cylinder; the second positioning bracket located above the curved portion of the front crossbeam and the curved portion of the rear crossbeam. The first slide rail slides on the first guide rail, causing the first reference block to be positioned directly above the first support block. The first positioning pin is placed in the positioning hole of the first positioning block. The first cylinder drives the first cylinder guide rod to push the subframe crossbeam supported by the first support block upward to the first reference block. The second slide rail slides on the second guide rail, causing the second reference block to be positioned directly above the second support block and above the curved part of the crossbeam and the curved part of the rear crossbeam. The second positioning pin is placed in the positioning hole of the second positioning block. The second cylinder drives the second cylinder guide rod until the upper part of the curved part of the front crossbeam and the curved part of the rear crossbeam is pushed to the second reference block.

2. The testing mechanism for a chassis subframe as described in claim 1, characterized in that, The first I-shaped positioning base plate has a first guide rail front fixing block at one end near the sub-frame crossbeam and a first guide rail rear fixing block at the other end away from the sub-frame crossbeam.

3. The testing mechanism for a chassis subframe as described in claim 2, characterized in that, The first guide rail has a first front limiting block at one end near the front fixing block and connected to the upper part of the first I-shaped positioning base plate, and a first rear limiting block at one end near the rear fixing block and connected to the upper part of the first I-shaped positioning base plate.

4. The testing mechanism for a chassis subframe as described in claim 1, characterized in that, The first suspension assembly includes: a first L-shaped connecting plate connected to the first slide rail fixing plate, a first L-shaped block connected to the first L-shaped connecting plate, and a first reference fixing plate connected to the first L-shaped block and the first reference block; the second suspension assembly includes: a second L-shaped connecting plate connected to the second slide rail fixing plate, a second L-shaped block connected to the second L-shaped connecting plate, and a second reference fixing plate connected to the second L-shaped block and the second reference block.

5. The testing mechanism for a chassis subframe as described in claim 4, characterized in that, A first reinforcing plate is welded inside the first L-shaped connecting plate, a second reinforcing plate is welded inside the second L-shaped connecting plate, and a third reinforcing plate is welded inside the second L-shaped block.

6. The testing mechanism for a chassis subframe as described in claim 1, characterized in that, The height of the second positioning bracket is greater than that of the first positioning bracket.

7. The testing mechanism for a chassis subframe as described in claim 1, characterized in that, The length of the second I-shaped positioning base plate is less than that of the first I-shaped positioning base plate.

8. The testing mechanism for a chassis subframe as described in claim 1, characterized in that, The height of the second I-shaped positioning base plate is greater than that of the first I-shaped positioning base plate.

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