Sealing device of engine intake manifold

Abstract

The utility model discloses a sealing device of an engine intake manifold, which comprises a support frame, a positioning table and one or more pressing mechanisms arranged on the support frame, the positioning table is fixedly arranged on the top surface of the support frame and used for placing the intake manifold, and the pressing mechanisms are used for pressing mounting holes of the intake manifold; the pressing mechanism comprises a pressing plate and a first driver used for driving the pressing plate to move in the horizontal direction so as to be close to and / or away from the mounting hole, the pressing plate comprises an extension rod, the length direction of the extension rod is parallel to the direction in which the first driver drives the pressing plate to move, and the width of the extension rod is larger than the outer diameter of the mounting hole. According to the sealing device, the first press-fitting mechanism is arranged, the first driver is used for driving the extension rod on the pressing plate to enter the position between the two adjacent bent pipes on the intake manifold from the side face of the intake manifold, and therefore a mounting hole blocked by a throttle valve can be pressed; the problem that a pressing rod cannot be directly used for pressing a mounting hole from top to bottom is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of air tightness detection of intake manifolds, and in particular relates to a sealing device for an engine intake manifold. Background Art

[0002] The engine intake manifold's function is to distribute the air-fuel mixture (for carburetor or throttle-body gasoline injection engines) or clean air (for port fuel injection engines or diesel engines) to each cylinder. Located between the throttle and the engine's intake valve, the intake manifold distributes the air flow path to each cylinder as evenly as possible to reduce gas flow resistance and improve intake capacity. Currently, most intake manifolds are made of plastic. To facilitate processing and production, they are typically split into two or more pieces and then welded together. This welding process can result in poor welds or loose welds, which can prevent the intake manifold from meeting performance requirements. Therefore, an airtightness test fixture is required to specifically test the airtightness of the intake manifold to determine whether it meets performance requirements.

[0003] Since most intake manifold bolt holes are directly pressed down by the upper fixture's pressure rod, simulating the state of the intake manifold bolt holes being locked to the engine, performing airtightness testing in this state can better reflect the airtightness conditions during actual operation. However, due to structural issues, some intake manifolds have obstructions above the bolt holes, which cannot be directly pressed down by the pressure rod. Therefore, airtightness testing cannot be performed on these intake manifold structures. Utility Model Content

[0004] In view of this, in order to solve the problems of the prior art, the utility model provides an improved sealing device for the engine intake manifold, which can press the screw holes on the intake manifold that are blocked or have little space above, ensuring that the intake manifold is effectively sealed before the air tightness test.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A sealing device for an engine intake manifold comprises a support frame, a positioning platform and one or more clamping mechanisms arranged on the support frame, wherein the positioning platform is fixedly arranged on the top surface of the support frame for placing the intake manifold, and the clamping mechanism is used to press the mounting hole of the intake manifold, and the throttle of the intake manifold is located above the mounting hole; the clamping mechanism comprises a clamping plate and a first driver for driving the clamping plate to move in a horizontal direction to approach and / or away from the mounting hole, the clamping plate comprises an extension rod, the length direction of the extension rod is parallel to the direction in which the first driver drives the clamping plate to move, and the width of the extension rod is greater than the outer diameter of the mounting hole.

[0007] According to some preferred embodiments of the utility model, the end face of the extension rod near one end of the mounting hole is provided as an arc face.

[0008] According to some preferred embodiments of the utility model, the pressing mechanism further comprises a first fixed seat, a first connecting block, a connecting head, a second connecting block, a sliding block and a slide rail, the first fixed seat is fixedly connected with the shell of the first driver, and one end of the telescopic shaft of the first driver is fixedly connected with the connecting head.

[0009] According to some preferred embodiments of the utility model, one side of the second connecting block is fixedly connected with one side of the first connecting block, and a limiting groove is formed in the first connecting block from the top face to the bottom face.

[0010] According to some preferred embodiments of the utility model, the limiting groove comprises a first groove part and a second groove part in communication, the first groove part is near the first fixed seat, the first groove part is used for accommodating part of the telescopic shaft of the first driver, and the second groove part is used for accommodating the connecting head.

[0011] According to some preferred embodiments of the utility model, the bottom face of the second connecting block is fixedly provided with one sliding block at each end, the sliding blocks are provided in one-to-one correspondence with the slide rails and are slidingly connected, and the length direction of the slide rail is parallel to the length direction of the extension rod.

[0012] According to some preferred embodiments of the utility model, the pressing mechanism further comprises a third connecting block and a second driver used for driving the pressing plate to move in the vertical direction, the pressing plate further comprises a plate body, and the extension rod is fixedly arranged at the middle part of one side of the plate body near the air intake manifold; the top face of the third connecting block is fixedly connected with the bottom face of the plate body, the bottom face of the third connecting block is fixedly connected with one end of the telescopic shaft of the second driver, and the shell of the second driver is fixedly connected with the top face of the second connecting block.

[0013] According to some preferred embodiments of the utility model, the support frame comprises a first fixed plate and a second fixed plate, the first fixed plate is above the second fixed plate and has a gap between the first fixed plate and the second fixed plate, the first fixed seat and the slide rail are fixedly connected with the second fixed plate, and the first driver, the first connecting block and the second connecting block are below the first fixed plate.

[0014] According to some preferred embodiments of the utility model, a through groove penetrating through the thickness direction of the first fixed plate is formed corresponding to the pressing mechanism, and the through groove is used for allowing the pressing plate and the third connecting block to pass through.

[0015] According to some preferred implementation aspects of the present invention, the intake manifold includes a pressure-stabilizing chamber, a mounting seat, and a plurality of evenly spaced bends, the top of the bend is connected to the pressure-stabilizing chamber, the bottom of the bend is fixedly connected to the top surface of the mounting seat, the bottom surface of the mounting seat is fixedly connected to the top surface of the first fixing plate, the mounting seat is provided with the mounting hole, the mounting hole is located between two adjacent bends, and the width of the extension rod is smaller than the distance between the two adjacent bends.

[0016] Compared with the existing technology, the benefits of the present invention are: a sealing device for an engine intake manifold of the present invention, by setting a first pressing mechanism, uses a first driver to drive the extension rod on the clamping plate from the side of the intake manifold into between two adjacent bent pipes on the intake manifold, thereby being able to press the mounting hole blocked by the throttle here, to solve the problem that the mounting hole cannot be directly pressed from top to bottom using the pressing rod, and combined with the joint action of other existing clamping mechanisms on the tooling, it can effectively ensure that all screw holes on the intake manifold can be pressed, so as to achieve an airtight state when the screw holes of the simulated intake manifold are locked on the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Fig. 1 This is a schematic diagram of the three-dimensional structure of the intake manifold installed on the sealing device in a preferred embodiment of the present utility model;

[0019] Fig. 2 This is a schematic diagram of the three-dimensional structure of the sealing device in the preferred embodiment of the present utility model;

[0020] Fig. 3 This is a schematic diagram of the three-dimensional structure of the pressing mechanism in the preferred embodiment of the present utility model;

[0021] Wherein, the accompanying drawings are marked as follows:

[0022] Support frame-1, first fixed plate-11, through groove-111, second fixed plate-12, connecting rod-13, positioning platform-2, clamping mechanism-3, extension rod-311, plate body-312, first driver-32, first fixed seat-33, first connecting block-34, first groove portion-341, second groove portion-342, connecting head-35, second connecting block-36, slider-371, slide rail-372, third connecting block-38, second driver-39, sealing mechanism-4, second fixed seat-41, third driver-42, first bending plate-43, second bending plate-44, fourth driver-45, pressure head-46, intake manifold-5, pressure stabilizing chamber-51, bend pipe-52, throttle valve-53, pipe joint-54, mounting seat-55. DETAILED DESCRIPTION

[0023] In order to help those skilled in the art better understand the technical solutions of the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0024] Reference Figs. 1 to 3 The present embodiment is a sealing device for an engine intake manifold, comprising a support frame 1, a positioning platform 2, one or more pressing mechanisms 3 provided on the support frame 1, a sealing mechanism 4, and an existing pressing tool (not shown) for pressing screw holes at other locations on the intake manifold 5. In the present embodiment, two pressing mechanisms 3 are provided, one on each side of the intake manifold 5, and the sealing mechanism 4 is located on one side of the intake manifold 5 and close to the end of the intake manifold 5. The intake manifold 5 of the present embodiment comprises a pressure stabilizing chamber 51, a mounting seat 55, and a mounting plate 56. And four evenly spaced bends 52, the top of the bend 52 is connected to the pressure-stabilizing chamber 51, the bottom of the bend 52 is fixedly connected to the top surface of the mounting seat 55 to fix the intake manifold 5 on the support frame 1, and a mounting hole is provided on the mounting seat 55, and the mounting hole is located between two adjacent bends 52; a throttle valve 53 is provided in the middle of the top of the pressure-stabilizing chamber 51, and the throttle valve 53 is located above the second mounting hole; a pipe joint 54 is fixedly provided on the top of the throttle valve 53, and the pipe joint 54 is connected to the throttle valve 53 for connecting the PCV pipe.

[0025] Further, the support frame 1 comprises a first fixing plate 11, a second fixing plate 12 and a plurality of connecting rods 13 for fixedly connecting the first fixing plate 11 and the second fixing plate 12, the first fixing plate 11 is parallel to the second fixing plate 12; the first fixing plate 11 is located above the second fixing plate 12 and has a gap therebetween, the height of the gap is smaller than the height of the pressing mechanism 3, the mounting seat 55 and the bottom surface of the positioning table 2 are fixedly connected with the top surface of the first fixing plate 11, the shape and contour of the side surface of the positioning table 2 for contacting the intake manifold 5 are matched with a bend pipe 52 on the intake manifold 5, so that the intake manifold 5 can be quickly positioned on the first fixing plate 11 by using the positioning table 2. In addition, two through grooves 111 penetrating through the thickness direction of the first fixing plate 11 are further formed on the first fixing plate 11 corresponding to the two pressing mechanisms 3.

[0026] Further, the pressing mechanism 3 comprises a pressing plate, a first driver 32, a first fixing seat 33, a first connecting block 34, a connecting head 35, a second connecting block 36, a sliding block 371, a sliding rail 372, a third connecting block 38 and a second driver 39, the first driver 32, the first connecting block 34 and the second connecting block 36 are located below the first fixing plate 11, the bottom surfaces of the first fixing seat 33 and the sliding rail 372 are fixedly connected with the top surface of the second fixing plate 12, and the through grooves 111 are used for the pressing plate and the third connecting block 38 to pass through. The first fixing seat 33 is fixedly connected with the shell of the first driver 32, and the connecting head 35 is fixedly connected with one end of the telescopic shaft of the first driver 32; one side of the second connecting block 36 is fixedly connected with one side of the first connecting block 34, and two sliding blocks 371 are fixedly arranged at the bottom surface of the second connecting block 36, and the sliding blocks 371 and the sliding rails 372 are arranged in one-to-one correspondence and are in sliding connection. The top surface of the second connecting block 36 is fixedly connected with the shell of the second driver 39, one end of the telescopic shaft of the second driver 39 is fixedly connected with the bottom surface of the third connecting block 38, and the top surface of the third connecting block 38 is fixedly connected with the bottom surface of the pressing plate. The second driver 39 is used for driving the pressing plate to move in the vertical direction so that the pressing plate approaches or moves away from the mounting hole in the vertical direction.

[0027] Specifically, a limiting groove is defined from the top to the bottom surface of the first connecting block 34. The height of the limiting groove is less than or equal to the height of the first connecting block 34, and one end of the limiting groove is flush with the end of the first connecting block 34 proximal to the first actuator 32. The limiting groove includes a first groove portion 341 and a second groove portion 342 that are interconnected. The first groove portion 341 is proximal to the first fixing seat 33 and is configured to accommodate a portion of the telescopic shaft of the first actuator 32. The second groove portion 342 is configured to accommodate the connector 35. The width of the first groove portion 341 is configured to be smaller than the width of the second groove portion 342 and the outer diameter of the connector 35, so that the connector 35 does not move in the longitudinal direction of the first connecting block 34. This ensures that the first actuator 32 drives the connector 35 to extend and retract, thereby driving the first connecting block 34 to move, and further driving the second connecting block 36 and the slider 371 to move back and forth on the slide rail 372, ultimately driving the pressing plate to move horizontally toward and / or away from the mounting hole.

[0028] The clamping plate includes an extension rod 311 and a plate body 312. The extension rod 311 is fixedly arranged in the middle of one side of the plate body 312 close to the intake manifold 5. The width of the extension rod 311 is greater than the outer diameter of the mounting hole and smaller than the distance between the two adjacent curved pipes 52. The end face of the extension rod 311 close to the mounting hole is set as an arc-shaped surface to facilitate the extension rod 311 to extend into the gap between the two adjacent curved pipes 52; the length direction of the extension rod 311 is parallel to the length direction of the slide rail 372 and the direction in which the first driver 32 drives the clamping plate to move, ensuring that the extension rod 311 can gradually approach and press the mounting hole under the driving action of the first driver 32.

[0029] In this embodiment, since a sealing mechanism 4 for sealing the pipe joint 54 is also provided on the first fixing plate 11 of the support frame 1, the upper part of a mounting hole on the mounting seat 55 close to the sealing mechanism 4 is blocked by the sealing mechanism 4, which also makes it impossible to directly press down the mounting hole by using the pressure rod on the existing tooling to press it down. Therefore, a clamping mechanism 3 is further provided on the side of the intake manifold 5 away from the sealing mechanism 4, which is used to enter the gap between the two elbows 52 from the other side of the intake manifold 5 to press a mounting hole close to the sealing mechanism 4.

[0030] The sealing mechanism 4 includes a second fixed seat 41, a third driver 42, a first bending plate 43, a second bending plate 44, a fourth driver 45 and a pressure head 46, wherein the bottom surface of the second fixed seat 41 is fixedly connected to the top surface of the first fixed plate 11, the top of the second fixed seat 41 is fixedly connected to the shell of the third driver 42, one end of the telescopic shaft of the third driver 42 is fixedly connected to one side of the first bending plate 43, the top of the first bending plate 43 is fixedly connected to the top surface of the second bending plate 44, one side of the second bending plate 44 is fixedly connected to the shell of the fourth driver 45, one end of the telescopic shaft of the fourth driver 45 is fixedly connected to the pressure head 46, and the pressure head 46 is arranged toward the inlet of the pipe joint 54 of the intake manifold 5, and the area of ​​the end of the pressure head 46 close to the pipe joint 54 is larger than the inner diameter of the pipe joint 54, so as to ensure that the pressure head 46 effectively seals the pipe joint 54. The third driver 42 is used to drive the first bent plate 43 to move back and forth in a horizontal direction toward or away from the intake manifold 5, thereby driving the pressure head 46 toward or away from the intake manifold 5. The direction in which the third driver 42 drives the first bent plate 43 to move is parallel to the length of the extension rod 311. The fourth driver 45 is used to drive the pressure head 46 to move back and forth toward or away from the pipe joint 54. The direction in which the fourth driver 45 drives the pressure head 46 to move is perpendicular to the direction in which the third driver 42 drives the first bent plate 43 to move.

[0031] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sealing device for an engine intake manifold, characterized in that: It includes a support frame, a positioning platform and one or more clamping mechanisms arranged on the support frame, the positioning platform is fixedly arranged on the top surface of the support frame for placing the intake manifold, and the clamping mechanism is used to press the mounting hole of the intake manifold, and the throttle of the intake manifold is located above the mounting hole; the clamping mechanism includes a clamping plate and a first driver for driving the clamping plate to move in a horizontal direction to approach and / or away from the mounting hole, the clamping plate includes an extension rod, the length direction of the extension rod is parallel to the direction in which the first driver drives the clamping plate to move, and the width of the extension rod is greater than the outer diameter of the mounting hole.

2. The sealing device according to claim 1, characterized in that An end surface of the extension rod close to the mounting hole is configured as an arc surface.

3. The sealing device according to claim 1, characterized in that The clamping mechanism also includes a first fixed seat, a first connecting block, a connecting head, a second connecting block, a slider and a slide rail. The first fixed seat is fixedly connected to the housing of the first driver, and the connecting head is fixedly connected to one end of the telescopic shaft of the first driver.

4. The sealing device according to claim 3, characterized in that One side of the second connecting block is fixedly connected to one side of the first connecting block. The first connecting block is provided with a limiting groove from its top surface to its bottom surface. The height of the limiting groove is less than or equal to the height of the first connecting block.

5. The sealing device according to claim 4, characterized in that The limiting groove includes a first groove portion and a second groove portion that are connected to each other. The first groove portion is close to the first fixing seat. The first groove portion is used to accommodate part of the telescopic shaft of the first driver. The second groove portion is used to accommodate the connecting head. The width of the first groove portion is smaller than the width of the second groove portion and the outer diameter of the connecting head.

6. The sealing device according to claim 3, characterized in that A slider is fixedly provided at both ends of the bottom surface of the second connecting block. The sliders are provided in a one-to-one correspondence with the slide rails and are slidably connected. The length direction of the slide rail is parallel to the length direction of the extension rod.

7. The sealing device according to claim 3, characterized in that The clamping mechanism also includes a third connecting block and a second driver for driving the clamping plate to move in a vertical direction. The clamping plate also includes a plate body. The extension rod is fixedly arranged in the middle of one side of the plate body close to the intake manifold; the top surface of the third connecting block is fixedly connected to the bottom surface of the plate body, the bottom surface of the third connecting block is fixedly connected to one end of the telescopic shaft of the second driver, and the shell of the second driver is fixedly connected to the top surface of the second connecting block.

8. The sealing device according to claim 7, characterized in that The support frame includes a first fixed plate and a second fixed plate, the first fixed plate is located above the second fixed plate with a gap between the two, the first fixed seat and the slide rail are fixedly connected to the second fixed plate, and the first driver, the first connecting block and the second connecting block are all located below the first fixed plate.

9. The sealing device according to claim 8, characterized in that A through slot is provided on the first fixing plate corresponding to the pressing mechanism and runs through the first fixing plate in its thickness direction, and the through slot is used for the pressing plate and the third connecting block to pass through.

10. The sealing device according to claim 8, characterized in that The intake manifold includes a pressure-stabilizing chamber, a mounting seat, and a plurality of evenly spaced curved pipes. The top of the curved pipe is connected to the pressure-stabilizing chamber, the bottom of the curved pipe is fixedly connected to the top surface of the mounting seat, the bottom surface of the mounting seat is fixedly connected to the top surface of the first fixing plate, the mounting seat is provided with the mounting hole, the mounting hole is located between two adjacent curved pipes, and the width of the extension rod is smaller than the distance between the two adjacent curved pipes.

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