A testing fixture for an automobile connecting pipe

Abstract

The utility model relates to a kind of detection tools of automobile connecting pipe, including seat plate and the main body being located at the top of seat plate, main body includes the headstock being fixed on seat plate, the tailstock being movably connected on seat plate to have front and rear translation function and being located in headstock right side, the first displacement cylinder being fixed on seat plate, and the U-shaped supporting block being fixed on seat plate and being located between headstock and tailstock;Main body further includes air-tightness detection unit, air-tightness detection unit includes first pipe cover being embedded in first flange seat, second pipe cover being embedded in second flange seat, and conduit being transversely and sealingly inserted and fixed in second pipe cover;The utility model integrates the function of air-tightness test, only needs to complete the size precision verification of automobile connecting pipe and air-tightness test by once dismounting, and then effectively simplifies the operation steps to save more time, to greatly improve the detection efficiency.

Description

Technical Field

[0001] This utility model relates to a tool for inspecting automotive connecting pipes. Background Technology

[0002] A connecting pipe is installed between the exhaust manifold and the intake manifold of a car. Its function is to reintroduce some of the exhaust gas from the engine into the intake system, mix it with fresh air, and then re-enter the cylinder for combustion. Like other automotive pipes, the connecting pipe must be inspected for its external dimensions and the position of each mounting hole on a special inspection tool after it has been processed.

[0003] Since the connecting pipe is used to transport gas, it also needs to be tested for air tightness. The existing automotive connecting pipe fixture only has the function of verifying dimensional accuracy. If an air tightness test is to be performed, the automotive connecting pipe must be removed from the fixture and installed into the air tightness testing equipment. Since the removal and installation of automotive connecting pipes are basically done manually, the operation steps are cumbersome. At the same time, the frequent removal and installation of automotive connecting pipes consumes a lot of time, resulting in low testing efficiency, which needs to be further improved. Utility Model Content

[0004] In view of the current state of the prior art, the technical problem to be solved by this utility model is to provide an inspection tool for automotive connecting pipes that integrates airtightness testing function, thereby effectively simplifying the operation steps and saving more time, and thus greatly improving the testing efficiency.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a tool for inspecting automotive connecting pipes, including a seat plate and a main body disposed on the top of the seat plate, characterized in that the main body includes a head frame fixed on the seat plate, a tail frame movably connected to the seat plate to have a forward and backward translation function and located to the right of the head frame, a first displacement cylinder fixed on the seat plate, and a U-shaped support block fixed on the seat plate and located between the head frame and the tail frame, wherein the telescopic end of the first displacement cylinder is arranged laterally forward or backward and fixed on the tail frame;

[0006] The main body also includes a first flange seat fixed to the rear side of the head frame, several first positioning pins laterally fixed to the end face of the first flange seat, a second flange seat fixed to the front side of the tail frame, several second positioning pins laterally fixed to the end face of the second flange seat, and several third positioning pins laterally fixed to the end face of the second flange seat.

[0007] The main body also includes an airtightness detection unit, which includes a first pipe cover embedded in a first flange seat, a second pipe cover embedded in a second flange seat, and a conduit that is transversely and sealedly inserted and fixed in the second pipe cover. The first pipe cover has a through hole.

[0008] The main body also includes a dynamic positioning unit, which includes a positioning column that is laterally and movably interposed in the tailstock and the second flange seat, and a fourth positioning pin that is concentrically fixed to the front end of the positioning column.

[0009] Preferably, it further includes a locking mechanism located on the top of the seat plate and in front of or behind the main body. The locking mechanism includes a movable seat movably connected to the seat plate to have a forward and backward translation function, a second displacement cylinder fixed to the seat plate, a guide block fixed to the movable seat, a locking block movably connected to the guide block near the side of the U-shaped support block to have a left and right tilting function, and a pin fixed to the locking block near the side of the U-shaped support block. The telescopic end of the second displacement cylinder is arranged laterally forward or backward and fixed to the movable seat.

[0010] Preferably, the main body further includes a pad fixed on the seat plate and located between the head frame and the U-shaped support block, two limiting blocks symmetrically fixed on the front and rear sides of the pad, and two support blocks fixed on the seat plate and symmetrically located on the front and rear sides of the pad.

[0011] Preferably, it further includes a limiting mechanism disposed on the top of the seat plate and located to the left or right of the pad block. The limiting mechanism includes a first raising seat fixed on the seat plate, a base fixed on the top of the first raising seat, and a first limiting strip rotatably connected to the base.

[0012] Preferably, the dynamic positioning unit further includes a second lifting seat fixed to the top of the base plate, a first anti-deviation column horizontally and movably inserted in the second lifting seat, a first positioning cylinder fixed on the second lifting seat, a stop block fixed to the front end of the first anti-deviation column and located in front of the second lifting seat, and a baffle vertically fixed on the positioning column and located behind the second lifting seat. The rear end of the positioning column movably passes through the second lifting seat and is fixed on the baffle. The telescopic end of the first positioning cylinder is horizontally forward or backward and fixed on the baffle.

[0013] Preferably, the locking mechanism further includes two inclined and movably interposed guide pillars that are parallel to each other in the guide block, an anti-detachment block fixed on the two guide pillars between the ends away from the U-shaped support block, and a second positioning cylinder fixed on the guide block. The telescopic end of the second positioning cylinder is arranged parallel to the moving direction of the locking block and fixed on the anti-detachment block. The locking block is fixed on the two guide pillars between the ends near the U-shaped support block.

[0014] Preferably, the locking mechanism further includes a side block fixed on the guide block, an anti-rotation pin fixed laterally on the side block, a heightening column fixed obliquely on the locking block and perpendicular to any one of the guide columns, and a second limiting strip that is rotatably obliquely connected to the end of the heightening column.

[0015] Preferably, the main body further includes a locking rod rotatably connected to the tailstock and a locking block fixed to the top of the seat plate and located on the left or right side of the tailstock. The top of the locking block has two locking grooves distributed front and back and cooperating with the locking rod.

[0016] Compared with the prior art, the advantages of this utility model are: this utility model integrates the function of air tightness testing, and only requires one disassembly and assembly to complete the verification of the dimensional accuracy of the automotive connecting pipe and the air tightness test, thereby effectively simplifying the operation steps and saving more time, thus greatly improving the testing efficiency. Attached Figure Description

[0017] The above and other features, advantages, and aspects of the embodiments of this application will become more apparent when taken in conjunction with the accompanying drawings and the following detailed description; throughout the drawings, the same or similar reference numerals denote the same or similar elements; it should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale; in the drawings:

[0018] Figure 1 This is a structural diagram of the right front side of this utility model;

[0019] Figure 2 This is a structural diagram of the left rear side of this utility model. Detailed Implementation

[0020] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0021] To keep the following description of the embodiments of this utility model clear and concise, detailed descriptions of known functions and known components are omitted.

[0022] like Figures 1-2As shown, a tool for inspecting automotive connecting pipes includes a seat plate 1 and a main body 2 disposed on the top of the seat plate 1. The main body 2 includes a head frame 21 fixed on the seat plate 1, a tail frame 22 movably connected to the seat plate 1 to have a forward and backward translation function and located to the right of the head frame 21, a first displacement cylinder 23 fixed on the seat plate 1, and a U-shaped support block 211 fixed on the seat plate 1 and located between the head frame 21 and the tail frame 22. The telescopic end of the first displacement cylinder 23 is arranged laterally forward or backward and fixed on the tail frame 22.

[0023] The main body 2 also includes a first flange seat 212 fixed to the rear side of the head frame 21, several first positioning pins 214 laterally fixed to the end face of the first flange seat 212, a second flange seat 24 fixed to the front side of the tail frame 22, several second positioning pins 217 laterally fixed to the end face of the second flange seat 24, and several third positioning pins 218 laterally fixed to the end face of the second flange seat 24.

[0024] The main body 2 also includes an airtightness detection unit, which includes a first pipe cover 213 embedded in the first flange seat 212, a second pipe cover 215 embedded in the second flange seat 24, and a conduit 216 that is transversely and sealedly inserted and fixed in the second pipe cover 215. A through hole 2131 is provided in the first pipe cover 213.

[0025] The main body 2 also includes a dynamic positioning unit, which includes a positioning post 26 that is laterally and movably interposed in the tailstock 22 and the second flange seat 24, and a fourth positioning pin 28 that is concentrically fixed to the front end of the positioning post 26.

[0026] A tooling for inspecting automotive connecting pipes further includes a locking mechanism 3 located on the top of a seat plate 1 and in front of or behind a main body 2. The locking mechanism 3 includes a movable seat 31 movably connected to the seat plate 1 to have a forward and backward translation function, a second displacement cylinder 32 fixed to the seat plate 1, a guide block 33 fixed to the movable seat 31, a locking block 34 movably connected to the guide block 33 near the side of the U-shaped support block 211 to have a left and right tilting function, and a pin seat 35 fixed to the locking block 34 near the side of the U-shaped support block 211. The telescopic end of the second displacement cylinder 32 is arranged laterally forward or backward and fixed to the movable seat 31.

[0027] The main body 2 also includes a pad 29 fixed on the seat plate 1 and located between the head frame 21 and the U-shaped support block 211, two limiting blocks 210 respectively symmetrically fixed on the front and rear sides of the pad 29, and two support blocks 219 fixed on the seat plate 1 and respectively symmetrically arranged on the front and rear sides of the pad 29.

[0028] A tooling for inspecting automotive connecting pipes further includes a limiting mechanism 4 disposed on the top of a seat plate 1 and located to the left or right of a pad block 29. The limiting mechanism 4 includes a first lifting seat 41 fixed on the seat plate 1, a base 42 fixed on the top of the first lifting seat 41, and a first limiting strip 43 rotatably connected to the base 42.

[0029] The dynamic positioning unit also includes a second lifting seat 25 fixed to the top of the seat plate 1, a first anti-deviation column 220 horizontally and movably inserted in the second lifting seat 25, a first positioning cylinder 27 fixed on the second lifting seat 25, a stop block 222 fixed to the front end of the first anti-deviation column 220 and located in front of the second lifting seat 25, and a baffle 221 vertically fixed on the positioning column 26 and located behind the second lifting seat 25. The rear end of the positioning column 26 movably passes through the second lifting seat 25 and is fixed on the baffle 221. The telescopic end of the first positioning cylinder 27 is horizontally forward or backward and fixed on the baffle 221.

[0030] The locking mechanism 3 also includes two inclined and movably interspersed guide posts 312 that are parallel to each other in the guide block 33, a release block 311 fixed on the two guide posts 312 between the ends away from the U-shaped support block 211, and a second positioning cylinder 310 fixed on the guide block 33. The extension end of the second positioning cylinder 310 is arranged parallel to the moving direction of the locking block 34 and fixed on the release block 311. The locking block 34 is fixed on the two guide posts 312 between the ends near the U-shaped support block 211.

[0031] The locking mechanism 3 also includes a side block 36 fixed on the guide block 33, an anti-rotation pin 37 fixed laterally on the side block 36, an extension post 38 fixed obliquely on the locking block 34 and perpendicular to any one of the guide posts 312, and a second limiting strip 39 rotatably and obliquely connected to the end of the extension post 38.

[0032] The main body 2 also includes a locking rod 223 rotatably connected to the tailstock 22 and a locking block 224 fixed to the top of the seat plate 1 and located to the left or right of the tailstock 22. The top of the locking block 224 has two locking grooves 2241 distributed in the front and back and cooperating with the locking rod 223.

[0033] Working principle:

[0034] The front section of the automotive connecting pipe is placed laterally on top of the pad 29 and positioned between the two limiting blocks 210. The rear section of the automotive connecting pipe is then placed laterally inside the U-shaped support block 211. The automotive connecting pipe is then moved forward so that its front opening is against the end face of the first flange seat 212 and each first positioning pin 214 is inserted into the corresponding pin hole at the front end of the automotive connecting pipe. The telescopic end of the first shifting cylinder 23 is then driven to extend outward to move the tail carriage 22 forward, thereby pressing the end of the second flange seat 24 against the rear opening of the automotive connecting pipe and engaging each second positioning pin. 217 and each third positioning pin 218 are inserted into the corresponding pin hole at the rear end of the vehicle connecting tube; then the telescopic end of the first positioning cylinder 27 is driven to retract inward to move the positioning pin 26 forward with the help of the baffle 221, thereby causing the fourth positioning pin 28 to be inserted into the corresponding pin hole at the rear end of the vehicle connecting tube, thus completing the lateral positioning of the vehicle connecting tube. At this time, the locking rod 223 moves to a front locking groove 2241 on the locking block 224, and swings the locking rod 223 downward to embed it into the front locking groove 2241, thereby preventing the tail frame 22 from accidentally shifting.

[0035] Next, the first limiting bar 43 in the lateral swing limiting mechanism 4 is positioned above the vehicle connecting pipe to prevent the vehicle connecting pipe from shifting up or down. Then, the telescopic end of the second shifting cylinder 32 in the locking mechanism 3 is driven to retract inward so that the guide block 33, locking block 34 and pin seat 35 move forward with the help of the moving seat 31 until the pin seat 35 moves to the designated position. Then, the telescopic end of the second positioning cylinder 310 is driven to extend outward so that the locking block 34 moves towards the vehicle connecting pipe with the help of the anti-disengagement block 311 and the two guide pillars 312 until the end of the pin seat 35 is inserted into the corresponding pin hole on the outer wall of the middle part of the vehicle connecting pipe. During the movement, the guide block 33 also drives the anti-rotation pin 37 to move synchronously until the end of the anti-rotation pin 37 is inserted forward into the corresponding pin hole on the outer wall of the middle part of the vehicle connecting pipe. After that, the second limiting bar 39 is laterally swinged to position it above the middle part of the vehicle connecting pipe to prevent the vehicle connecting pipe from shifting up or down.

[0036] Next, the dimensions and hole positions at key locations of the automotive connecting pipe can be inspected using measuring tools such as go / no-go gauges (existing technology); in addition, a pressure sensor is sealed and installed in the through hole 2131 and pressurized gas is introduced into the interior of the automotive connecting pipe through the conduit 216. By monitoring the pressure value of the pressure sensor, it can be determined whether the pressure inside the automotive connecting pipe is normal, and thus determine whether the airtightness of the automotive connecting pipe is qualified.

[0037] This utility model integrates the function of airtightness testing, which can complete the verification of the dimensional accuracy and airtightness test of the automotive connecting pipe with only one disassembly and assembly, thereby effectively simplifying the operation steps and saving a lot of time, thus greatly improving the testing efficiency.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A fixture for inspecting automotive connecting pipes, comprising a base plate and a main body disposed on top of the base plate, characterized in that, The main body includes a head frame fixed to the seat plate, a tail frame movably connected to the seat plate to have a forward and backward translation function and located to the right of the head frame, a first displacement cylinder fixed to the seat plate, and a U-shaped support block fixed to the seat plate and located between the head frame and the tail frame. The telescopic end of the first displacement cylinder is set laterally forward or backward and fixed to the tail frame. The main body also includes a first flange seat fixed to the rear side of the head frame, several first positioning pins laterally fixed to the end face of the first flange seat, a second flange seat fixed to the front side of the tail frame, several second positioning pins laterally fixed to the end face of the second flange seat, and several third positioning pins laterally fixed to the end face of the second flange seat. The main body also includes an airtightness detection unit, which includes a first pipe cover embedded in a first flange seat, a second pipe cover embedded in a second flange seat, and a conduit that is transversely and sealedly inserted and fixed in the second pipe cover. The first pipe cover has a through hole. The main body also includes a dynamic positioning unit, which includes a positioning column that is laterally and movably interposed in the tailstock and the second flange seat, and a fourth positioning pin that is concentrically fixed to the front end of the positioning column.

2. The inspection tool for automotive connecting pipes according to claim 1, characterized in that, It also includes a locking mechanism located on the top of the seat plate and in front of or behind the main body. The locking mechanism includes a movable seat movably connected to the seat plate to have a forward and backward translation function, a second displacement cylinder fixed to the seat plate, a guide block fixed to the movable seat, a locking block movably connected to the guide block near the side of the U-shaped support block to have a left and right tilting function, and a pin fixed to the locking block near the side of the U-shaped support block. The telescopic end of the second displacement cylinder is set laterally forward or backward and fixed to the movable seat.

3. The inspection tool for automotive connecting pipes according to claim 1, characterized in that, The main body also includes a pad fixed on the seat plate and located between the head frame and the U-shaped support block, two limiting blocks symmetrically fixed on the front and rear sides of the pad, and two support blocks fixed on the seat plate and symmetrically located on the front and rear sides of the pad.

4. The inspection tool for automotive connecting pipes according to claim 3, characterized in that, It also includes a limiting mechanism located on the top of the seat plate and to the left or right of the pad block. The limiting mechanism includes a first raising seat fixed to the seat plate, a base fixed to the top of the first raising seat, and a first limiting strip rotatably connected to the base.

5. The inspection tool for automotive connecting pipes according to claim 1, characterized in that, The dynamic positioning unit further includes a second lifting seat fixed to the top of the base plate, a first anti-deviation column horizontally and movably inserted in the second lifting seat, a first positioning cylinder fixed on the second lifting seat, a stop block fixed to the front end of the first anti-deviation column and located in front of the second lifting seat, and a baffle vertically fixed on the positioning column and located behind the second lifting seat. The rear end of the positioning column movably passes through the second lifting seat and is fixed on the baffle. The telescopic end of the first positioning cylinder is horizontally forward or backward and fixed on the baffle.

6. The inspection tool for automotive connecting pipes according to claim 2, characterized in that, The locking mechanism also includes two inclined and movably interspersed guide pillars that are parallel to each other in the guide block, a locking block fixed on the two guide pillars between the ends away from the U-shaped support block, and a second positioning cylinder fixed on the guide block. The telescopic end of the second positioning cylinder is arranged parallel to the moving direction of the locking block and fixed on the locking block. The locking block is fixed on the two guide pillars between the ends near the U-shaped support block.

7. The inspection tool for automotive connecting pipes according to claim 6, characterized in that, The locking mechanism also includes a side block fixed to the guide block, an anti-rotation pin fixed laterally to the side block, a heightening column fixed obliquely to the locking block and perpendicular to any one of the guide columns, and a second limiting strip that is rotatably obliquely connected to the end of the heightening column.

8. The inspection tool for automotive connecting pipes according to claim 1, characterized in that, The main body also includes a locking rod rotatably connected to the tailstock and a locking block fixed to the top of the seat plate and located on the left or right side of the tailstock. The top of the locking block has two locking grooves distributed front and back and cooperating with the locking rod.

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