Air tightness testing device

Abstract

The utility model discloses an air tightness testing device which comprises a support arranged on a production line, the support is transversely provided with a linear slide rail, one end of the linear slide rail is provided with a fixed seat, the linear slide rail is slidably provided with a movable seat, and the movable seat is driven by a driving mechanism to move back and forth along the linear slide rail; the fixed seat is provided with a first sleeve which is in sealed connection with one end of a product, the movable seat is provided with a second sleeve which can be in sealed connection with the other end of the product, the fixed seat is provided with a gas circuit which is communicated with the interior of the first sleeve, and the gas circuit is connected with an external pressure stabilizing source through a pipeline. And the pipeline is connected with a pressure stabilizer for measuring pressure drop. By detecting the air tightness of the gearbox connector on a production line, whether the gearbox connector has quality problems such as tiny cracks or not can be known in advance, the detection procedure of a rear-end automobile gearbox is simplified, and the quality problems caused by the gearbox connector are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile parts detection and relates to an airtightness testing device. Background Art

[0002] The automobile gearbox is a mechanism used to change the speed and torque from the engine. It can change the transmission ratio of the output shaft and the input shaft in a fixed or step-by-step manner. Figure 1 The transmission connector shown in the figure is not inspected for quality problems during the production process, and the overall quality inspection is uniformly adopted after the automobile transmission is assembled. This makes the inspection of automobile transmissions cumbersome and inconvenient for personnel to operate. At the same time, if there are quality problems such as tiny cracks on the transmission connector, conventional visual inspection or CCD scanning inspection cannot detect it, which is easy to cause overall quality problems of the automobile transmission.

[0003] Therefore, it is necessary to improve the prior art to overcome the defects in the prior art. Utility Model Content

[0004] The utility model aims to provide an airtightness testing device, which can avoid quality problems of a gearbox connector on a production line by performing an airtightness test on the gearbox connector.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] An air tightness testing device comprises a bracket arranged on a production line, wherein a linear slide is arranged transversely on the bracket, a fixed seat is arranged at one end of the linear slide, a movable seat is slidably arranged on the linear slide, and the movable seat moves forward and backward along the linear slide under the drive of a driving mechanism; and

[0007] The fixed seat is provided with a first sleeve which is sealed and connected to one end of the product, the movable seat is provided with a second sleeve which can be sealed and connected to the other end of the product, the fixed seat is provided with an air circuit which is connected to the inside of the first sleeve, the air circuit is connected to an external pressure stabilizing source through a pipeline, and the pipeline is connected to a pressure stabilizer for measuring pressure drop.

[0008] As a further improvement of an embodiment of the utility model, the first sleeve is provided with a first sealing ring for sealing one end of the product, and the second sleeve is provided with a second sealing ring for sealing the other end of the product.

[0009] As a further improvement of an embodiment of the utility model, the first sleeve is fixed to the fixing seat by bolts, and a third sealing ring is provided at the connection between the first sleeve and the fixing seat.

[0010] As a further improvement of an embodiment of the utility model, the bracket is provided with a first gear limiter for limiting the moving position of the movable seat; the fixed seat is slidably arranged on the linear slide rail through a slider, and the bracket is provided with a second gear limiter for limiting the moving position of the fixed seat.

[0011] As a further improvement of an embodiment of the utility model, a conveyor line is arranged on the outside of the bracket, and a tray for placing products is arranged on the conveyor line; a lifting mechanism capable of lifting the tray is arranged on one side of the bracket, and after the tray is lifted into place, the product on it is located at an airtightness testing station, and the first sleeve and the second sleeve can seal both ends of the product at the airtightness testing station.

[0012] As a further improvement of an embodiment of the utility model, a sensor is provided on the bracket, and the sensor can sense the tray located above the lifting mechanism.

[0013] As a further improvement of an embodiment of the utility model, the lifting mechanism includes a lifting frame, a lifting cylinder is invertedly arranged on the lifting frame, the piston end of the lifting cylinder is fixedly connected to the lifting platform, and a plurality of support columns are arranged on the upper end surface of the lifting platform.

[0014] As a further improvement of an embodiment of the utility model, a pair of positioning pins are provided on the upper end surface of the lifting platform, the height of the positioning pins is higher than the supporting columns, and positioning pin holes corresponding to the positioning pins are provided on the tray.

[0015] As a further improvement of an embodiment of the utility model, the lifting frame includes a group of positioning plates fixed on the frame of the conveyor line, a cylinder carrier plate for placing the lifting cylinder is arranged between the positioning plates, sliding sleeves are arranged at both ends of the cylinder carrier plate, a guide column is arranged in the sliding sleeve, and the upper end of the guide column is connected to the lifting platform.

[0016] As a further improvement of an embodiment of the utility model, the lower ends of the guide columns are connected to the bottom plate, and the bottom plate is provided with an avoidance groove for the lifting cylinder to pass through.

[0017] The adoption of the above technical solution has the following beneficial effects: by performing air tightness testing on the gearbox connector on the production line, it is possible to know in advance whether the gearbox connector has quality problems such as tiny cracks, simplify the rear-end automobile gearbox testing process, and overcome quality problems caused by the gearbox connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0019] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0020] Figure 1 This is a schematic diagram of the structure of the gearbox connector provided by the utility model.

[0021] Figure 2 A three-dimensional schematic diagram (including a tray and a product) provided by the utility model.

[0022] Figure 3 This is a three-dimensional schematic diagram (including product) provided by the utility model.

[0023] Figure 4 This is a three-dimensional schematic diagram of the first state provided by the utility model.

[0024] Figure 5 This is a three-dimensional schematic diagram of the second state provided by the utility model.

[0025] Figure 6 A three-dimensional schematic diagram of a tray and a lifting mechanism is provided for the utility model.

[0026] In the figure: 1- bracket; 2- linear slide rail; 3- fixed seat; 4- movable seat; 5- movable cylinder; 6- first sleeve; 7- second sleeve; 8- air circuit joint; 9- first sealing ring; 10- second sealing ring; 11- first gear; 12- second gear; 13- tray; 14- lifting cylinder; 15- lifting platform; 16- supporting column; 17- positioning plate; 18- cylinder carrier plate; 19- guide column; 20- bottom plate. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0029] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention. Example

[0030] See also Figure 1-Figure 6 As shown, an air tightness testing device includes a bracket 1 arranged on a production line, and the bracket 1 is a gantry bracket. The bracket 1 is laterally provided with a group of linear slide rails 2, and a fixed seat 3 is provided at one end of the linear slide rail 2. A movable seat 4 is slidably provided on the linear slide rail 2, and the movable seat 4 moves forward and backward along the linear slide rail 2 under the drive of the driving mechanism. The driving mechanism in this embodiment includes a movable cylinder 5, and the piston end of the movable cylinder 5 is connected to the movable seat 4 through a floating joint. A gear is provided on the bracket 1 to limit the moving range of the movable seat 4.

[0031] In this embodiment, the fixed seat 3 is provided with a first sleeve 6 which is sealed and connected to one end of the product, and the movable seat 4 is provided with a second sleeve 7 which can be sealed and connected to the other end of the product. The first sleeve 6 and the second sleeve 7 can cooperate to block the two ends of the product. The fixed seat 3 is provided with an air path which is connected to the inside of the first sleeve 6, and the fixed seat 3 is provided with an air path connector 8 which is connected to the air path. The air path connector 8 is connected to an external pressure stabilizing source through a pipeline to provide a stable pressure inside the product. The pipeline is connected to a pressure regulator for measuring the pressure drop. When the pressure provided inside the product is stable, the pressure stabilizing source cuts off the gas supply to the product. At this time, the inside of the product is in a closed state and the pressure remains unchanged. The pressure regulator performs an air tightness test on the internal pressure of the product to see whether the pressure drop meets the requirements within the specified time. If it meets the requirements, the air tightness test is normal and the product quality is OK; if it exceeds the range of the pressure drop, the product air tightness test fails, and the product is recycled and no longer used in the back end.

[0032] Specifically, the first sleeve 6 is provided with a first sealing ring 9 for sealing one end of the product, and the second sleeve 7 is provided with a second sealing ring 10 for sealing the other end of the product.

[0033] In this embodiment, the first sleeve 6 is fixed to the fixing seat 3 by bolts. In order to avoid air leakage at the connection between the first sleeve 3 and the fixing seat 6 , a third sealing ring is provided at the connection between the first sleeve 6 and the fixing seat 3 .

[0034] In this embodiment, both the movable seat 4 and the fixed seat 3 can move on the linear slide rail 2, that is, the movable seat 4 is slidably arranged on the linear slide rail 2 by a slider, and the fixed seat 3 is slidably arranged on the linear slide rail 2 by a slider. In order to prevent the movable seat 4 and the fixed seat 3 from moving beyond the range, a first stopper 11 for limiting the moving position of the movable seat 4 is provided on the bracket 1; and a second stopper 12 for limiting the moving position of the fixed seat is provided on the bracket 1.

[0035] The air tightness testing device in this embodiment is applied on a production line. A conveyor line is arranged outside the bracket 1 , and a tray 13 for placing products is arranged on the conveyor line for transmission.

[0036] In addition to placing products that are to be tested for air tightness, the tray 13 in this embodiment also places products used in other workstations, so that the tray 13 can be used in multiple workstations of the production line.

[0037] In this embodiment, after the tray 13 is in place, the lifting mechanism on one side of the bracket 1 moves the tray 13 upward as a whole to the air tightness test station. At this station, driven by the movable cylinder 5, the first sleeve 6 and the second sleeve 7 can seal the two ends of the product at the air tightness test station, so that the subsequent pressure stabilizing source can supply air to the product for air tightness test operation.

[0038] Specifically, a sensor is provided on the bracket 1, and the above-mentioned sensor can sense the pallet located above the lifting mechanism; or the sensor is provided on the pallet, and a sensor sheet corresponding to the sensor is provided on the bracket 1 or the lifting mechanism. After the pallet is in place, the conveyor line stops running, and the lifting mechanism starts to lift the pallet to the air tightness detection station.

[0039] The lifting mechanism in this embodiment uses a lifting cylinder as a driving source to push the lifting platform to move up and down, thereby driving the tray to move up and down.

[0040] Specifically, the lifting mechanism includes a lifting frame, on which a lifting cylinder 14 is invertedly arranged, and the piston end of the lifting cylinder 14 is fixedly connected to the lifting platform 15, and a plurality of support columns 16 are arranged on the upper end surface of the lifting platform 15. When the tray 13 is in place, the lifting platform 15 moves upward under the drive of the lifting cylinder 14, so that the upper support column 16 contacts the tray and lifts the tray. In order to ensure the stability of the tray when it moves upward, a pair of positioning pins are arranged on the upper end surface of the lifting platform 15, and the height of the positioning pins is higher than the support column, and the tray 13 is provided with positioning pin holes corresponding to the positioning pins.

[0041] In this embodiment, the lifting frame includes a group of positioning plates 17 fixed on the frame of the conveyor line, and a cylinder carrier plate 18 for placing the lifting cylinder 14 is arranged between the positioning plates 17. The two ends of the cylinder carrier plate 18 are provided with sliding sleeves, and the sliding sleeves are provided with guide columns 19. The upper end of the guide column 19 is connected to the lifting platform 15. The lifting platform 15 is guided to move up and down by the guide column 19 to improve its stability in moving up and down. A group of positioning plates 17 are used so that it can be directly installed on the frame of the production line according to production needs, thereby improving its installation convenience.

[0042] Preferably, the lower ends of the guide columns 19 are connected to the bottom plate 20, and an avoidance groove for the lifting cylinder 14 to pass through is provided on the bottom plate 20. The overall stability of the lifting frame is improved by using the bottom plate 20.

[0043] The air tightness testing device provided by the utility model is a component of an automobile gearbox assembly production line, and its air supply, power supply and control parts are all provided uniformly by the air supply unit, power supply unit and control unit on the production line to realize the automatic operation of the production line.

[0044] In summary, the embodiments of the present invention achieve the following technical effects:

[0045] The utility model can perform air tightness detection on the gearbox connector on the production line, and know in advance whether the gearbox connector has quality problems such as tiny cracks, simplify the rear-end automobile gearbox detection process, and overcome the quality problems caused by the gearbox connector.

[0046] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0047] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0048] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0049] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An airtightness testing device, comprising a bracket arranged on a production line, characterized in that: The bracket is laterally provided with a linear slide rail, a fixed seat is provided at one end of the linear slide rail, a movable seat is slidably provided on the linear slide rail, and the movable seat moves forward and backward along the linear slide rail under the drive of the driving mechanism; and The fixed seat is provided with a first sleeve which is sealed and connected to one end of the product, the movable seat is provided with a second sleeve which can be sealed and connected to the other end of the product, the fixed seat is provided with an air circuit which is connected to the inside of the first sleeve, the air circuit is connected to an external pressure stabilizing source through a pipeline, and the pipeline is connected to a pressure stabilizer for measuring pressure drop.

2. The airtightness testing device according to claim 1, characterized in that: The first sleeve is provided with a first sealing ring for sealing one end of the product, and the second sleeve is provided with a second sealing ring for sealing the other end of the product.

3. The airtightness testing device according to claim 2, characterized in that: The first sleeve is fixed on the fixing seat by bolts, and a third sealing ring is arranged at the connection between the first sleeve and the fixing seat.

4. The airtightness testing device according to claim 3, characterized in that: The bracket is provided with a first stopper for limiting the moving position of the movable seat; the fixed seat is slidably arranged on the linear slide rail through a slider, and the bracket is provided with a second stopper for limiting the moving position of the fixed seat.

5. The airtightness testing device according to claim 1, characterized in that: A conveyor line is arranged outside the bracket, and a tray for placing products is arranged on the conveyor line for transmission; a lifting mechanism capable of lifting the tray is arranged on one side of the bracket, and after the tray is lifted into place, the product on it is located at the air tightness testing station, and the first sleeve and the second sleeve can seal both ends of the product at the air tightness testing station.

6. The airtightness testing device according to claim 5, characterized in that: The bracket is provided with a sensor, and the sensor can sense the tray located above the lifting mechanism.

7. The airtightness testing device according to claim 6, characterized in that: The lifting mechanism comprises a lifting frame, on which a lifting cylinder is invertedly arranged, a piston end of the lifting cylinder is fixedly connected to a lifting platform, and a plurality of supporting columns are arranged on the upper end surface of the lifting platform.

8. The airtightness testing device according to claim 7, characterized in that: A pair of positioning pins are arranged on the upper end surface of the lifting platform. The height of the positioning pins is higher than the supporting columns. Positioning pin holes corresponding to the positioning pins are arranged on the tray.

9. The airtightness testing device according to claim 7, characterized in that: The lifting frame includes a group of positioning plates fixed on the frame of the conveyor line, a cylinder carrier plate for placing the lifting cylinder is arranged between the positioning plates, sliding sleeves are arranged at both ends of the cylinder carrier plate, a guide column is arranged in the sliding sleeve, and the upper end of the guide column is connected to the lifting platform.

10. The airtightness testing device according to claim 9, characterized in that: The lower ends of the guide columns are connected to the bottom plate, and the bottom plate is provided with an avoidance groove for the lifting cylinder to pass through.

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