Air tightness testing device for assembly line

Abstract

The present invention relates to an air tightness detection device for an assembly line. An air tightness detection device for an assembly line comprises an assembly line and a flow plate arranged on the assembly line, a positioning mechanism and a detection mechanism are arranged on the assembly line, the detection mechanism is located above the positioning mechanism, the flow plate can be moved between the positioning mechanism and the detection mechanism under the action of the assembly line, the positioning mechanism comprises a jacking drive mechanism, the jacking drive mechanism has a first lifting rod arranged vertically, a lifting plate is arranged at the top of the first lifting rod, a positioning pin is fixed on the lifting plate, the flow plate is provided with a positioning hole opening downward and corresponding to the positioning pin, the detection mechanism comprises a pressing drive mechanism, the pressing drive mechanism has a second lifting rod arranged vertically, a detection pressure head is fixed at the lower end of the second lifting rod. The present invention has the advantages of being able to reduce the labor intensity of workers, having high detection efficiency and high detection accuracy, and being easy to realize automated detection.

Description

Technical Field

[0001] The invention relates to an automatic detection device for an assembly line, in particular to an air tightness detection device for an assembly line. Background Art

[0002] In the prior art, the air tightness of products such as motors or reduction gearboxes is tested by workers one by one on a work cover. High-pressure air is injected into the product, and then the pressure is maintained for a period of time. The air tightness of the product is determined by checking whether the pressure value after the pressure maintenance is within the set range.

[0003] Workers need to move products, which is very troublesome, high work intensity and low efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide an air tightness detection device for an assembly line which can improve detection efficiency and reduce the labor intensity of workers.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an air tightness detection device for an assembly line, comprising an assembly line and a flow plate arranged on the assembly line, a positioning mechanism and a detection mechanism being arranged on the assembly line, the detection mechanism being located above the positioning mechanism, the flow plate being able to move between the positioning mechanism and the detection mechanism under the action of the assembly line, the positioning mechanism comprising a jacking drive mechanism and at least two positioning pins extending upward, the jacking drive mechanism having a first lifting rod arranged vertically, a lifting plate being arranged at the top end of the first lifting rod, the positioning pin being fixed on the lifting plate, the flow plate being provided with a positioning hole opening downward and corresponding to the positioning pin, the detection mechanism comprising a pressing drive mechanism, the pressing drive mechanism having a second lifting rod arranged vertically, a detection pressure head being fixed at the lower end of the second lifting rod, the lower end surface of the detection pressure head being concave to form a ventilation groove, the detection pressure head being provided with a ventilation hole penetrating inside and outside, one end of the ventilation hole being connected to the ventilation groove, and the other end of the ventilation hole being connected to an air source through an air supply pipe.

[0006] When the device of the present invention is used, the product is placed on the flow plate of the assembly line, and the flow plate drives the product to move so that the product enters the detection area and moves out of the detection area. When the product is moved to the bottom of the detection device by the flow plate, the flow plate can be stopped by manipulating the assembly line, and then the lifting drive mechanism is started so that the positioning pins extend into the positioning holes of the flow plate to achieve the positioning and fixation of the flow plate. The lifting plate continues to move upward to lift the flow plate to separate the flow plate from the assembly line, and then the downward driving mechanism is operated to achieve the alignment of the product on the flow plate and the detection pressure head of the detection mechanism, and the contact and sealing of the detection pressure head and the shell of the product output end are achieved by pressing, and finally the gas source is supplied and the pressure is maintained and the pressure size is detected. Among them, how to achieve gas supply, how to achieve pressure maintenance for a certain period of time, and how to achieve the collection of the air pressure value in the product are all existing conventional technologies.

[0007] The arrangement of the present invention eliminates the need for workers to carry products up and down, which can reduce the labor intensity of workers and improve the efficiency of product airtightness testing, thereby improving product production efficiency. The lifting drive mechanism can lift the flow plate to separate the flow plate from the conveyor belt of the assembly line, thereby preventing the flow plate from tilting under the pressure of the detection pressure head, thereby improving the sealing effect between the product and the detection pressure head, thereby improving the detection accuracy.

[0008] Preferably, the positioning mechanism includes a fixed plate, the lifting drive mechanism is fixed to the fixed plate, a plurality of guide mechanisms are arranged between the fixed plate and the lifting plate, and the guide mechanisms include vertically arranged guide rods. The arrangement of the guide rods can prevent the lifting plate from tilting, so that the circulation plate will not tilt, so that the contact seal between the product and the detection pressure head is guaranteed, so that the detection effect is more accurate.

[0009] Preferably, a blocking mechanism is provided on the front side of the positioning mechanism, and the blocking mechanism includes a blocker for limiting the flow plate from moving forward further, and the blocker is electrically connected to a positioning sensor. When the flow plate moves to below the detection mechanism, the positioning sensor is triggered, so that the blocker limits the movement of the flow plate.

[0010] The above-mentioned settings enable the present invention to be better automated. Among them, the blocker can adopt the existing assembly line blocker (existing product on the market) that is suitable for the assembly line and can realize the limit of the flow plate. The positioning sensor is used to determine whether the flow plate has moved into place. The positioning sensor can adopt various sensors such as photoelectric sensors that can be used to determine the position of the flow plate. By setting the positioning sensor, the automation of the sealing detection can be realized, so that the conveyor belt on the assembly line can be started all the time without stopping and running, which is convenient for the assembly or detection of products in the upstream station of the detection mechanism. Among them, it can be arranged so that the positioning sensor, the lifting drive mechanism and the downward pressure drive mechanism are reset after the set working time, so as to make the airtightness detection of the product of the present invention more convenient.

[0011] Preferably, a pad is fixed on the upper side of the lifting plate, and the plane where the upper edge of the positioning pin is located is above the plane where the upper end surface of the pad is located. The pad is used to support the flow plate to make the contact area between the flow plate and the lifting plate smaller, so as to avoid the flow plate from tilting due to the uneven surface of the lifting plate.

[0012] Preferably, the cross-section of the upper section of the positioning pin has a long direction and a short direction, the width of the upper section of the positioning pin along the short direction is smaller than the inner diameter of the positioning hole, a contact surface is provided at each end of the upper section of the positioning pin along the long direction, the width of the upper section of the positioning pin along the long direction gradually increases from top to bottom, the minimum width of the upper section of the positioning pin along the long direction is smaller than the inner diameter of the positioning hole, and the maximum width of the upper section of the positioning pin along the long direction is greater than the inner diameter of the positioning hole; when the upper end of the positioning pin extends into the positioning hole, the contact surface contacts the lower end of the inner wall of the positioning hole.

[0013] The above arrangement makes the contact area between the positioning pin and the fixed plate smaller, avoiding inaccurate positioning due to processing problems. When the positioning pin moves upward, the contact surface of the positioning pin contacts the wall of the positioning hole, and the flow plate moves along the contact surface to adjust the position, so that the contact positioning effect between the product on the flow plate and the detection pressure head can be guaranteed.

[0014] Preferably, the contact surface is an arc surface, and the arc opening formed by the cross section of the contact surface faces the axis of the positioning pin. The setting of the contact surface as an arc surface can avoid point contact between the positioning pin and the fixing plate, and can improve the supporting and positioning effect of the fixing plate.

[0015] Preferably, two locating pins are provided on the lifting plate, and a locating hole is respectively provided at the four corners of the flow plate. The distances between two adjacent locating holes are the same, and the two locating pins are used to cooperate with the two locating holes diagonally opposite to the flow plate; the line between two adjacent locating holes of the flow plate is inclined to the side of the square flow plate. The above arrangement facilitates the placement of the flow plate on the assembly line without carefully determining the front and rear directions of the fixed plate. The line between two adjacent locating holes is inclined to the side of the square flow plate, so that the distance between the two locating holes is not very far, the distance between the two locating pins can be reduced, and the front and rear length of the lifting plate can be set smaller. Among them, the locating hole is located at the corner of the flow plate, so that the distance between the two locating holes can be large enough to ensure the positioning effect and improve the detection accuracy.

[0016] Preferably, the frame of the assembly line includes two frames on opposite sides, the left and right ends of the fixed plate are respectively fixed to one frame, and the front and rear ends of the fixed plate are bent downward. The fixed plate is fixed to the frame of the assembly line, which can shorten the stroke of the first lifting rod and enable. At the same time, the front and rear ends of the fixed plate are bent, which can improve the bending strength of the fixed plate and prevent the middle part of the fixed plate from sinking to cause the fixed plate to bend.

[0017] Preferably, the fixing plate is provided with a first through hole for the guide rod to pass through, a guide sleeve is fixed in the first through hole, and the guide rod is always located in the guide sleeve. The guide sleeve and the fixing plate are not integrated, the guide sleeve can be made of a material that is not easy to wear, and the inner wall of the guide sleeve is easy to process and can be smoother.

[0018] Preferably, the circulation plate is provided with a positioning sleeve opening downward, and the positioning sleeve is provided with the positioning hole. The positioning sleeve and the circulation plate can be made of different materials, so that the wall of the positioning hole is not easy to wear, and is easy to process, and can make the wall of the positioning hole smoother.

[0019] Preferably, an annular elastic sealing pad is fixed to the lower side of the detection pressure head; the lower end surface of the detection pressure head is concave upward to form a fixing groove, the fixing groove is connected to the ventilation groove, and the thickness of the elastic sealing pad is greater than the depth of the fixing groove, and the lower end surface of the elastic sealing pad is located below the lower end surface of the detection pressure head. Through the deformation of the elastic sealing pad, it can fully contact with the shell of the product output end to improve the pressure holding effect and improve the accuracy of the sealing detection.

[0020] The present invention has the advantages of reducing the labor intensity of workers, having high detection efficiency and high detection accuracy, and being easy to realize automated detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is an axonometric view of the present invention;

[0022] Figure 2 It is a front view of the present invention;

[0023] Figure 3 A cross-sectional view of the pressing drive mechanism of the present invention;

[0024] Figure 4 A cross-sectional view of the detection pressure head of the present invention;

[0025] Figure 5 A structural schematic diagram of the positioning mechanism of the present invention;

[0026] Figure 6 A schematic diagram of the structure of the positioning pin of the present invention;

[0027] Figure 7 A cross-sectional view of the positioning pin of the present invention;

[0028] Figure 8 A top view of the flow plate of the present invention. DETAILED DESCRIPTION

[0029] The present invention will be further described below based on the accompanying drawings and specific embodiments.

[0030] Depend on Figure 1 and Figure 2 As shown, an air tightness detection device for an assembly line of the present invention comprises an assembly line 1 and a flow plate 2 arranged on the assembly line 1, a positioning mechanism 3 and a detection mechanism 4 are provided on the assembly line, the detection mechanism 4 is located above the positioning mechanism 3, and the flow plate 2 moves between the positioning mechanism 3 and the detection mechanism 4 under the action of the assembly line 1.

[0031] Depend on Figure 1 , Figure 2 and Figure 5 As shown, the positioning mechanism 3 includes a lifting drive mechanism 31 and two positioning pins 39 extending upward, the lifting drive mechanism 31 has a vertically arranged first lifting rod 32, a lifting plate 33 is arranged at the top of the first lifting rod 32, and the positioning pins 39 are fixed on the lifting plate 33. A cushion block 36 is fixed on the upper side of the lifting plate 33, and the plane where the upper edge of the positioning pin 39 is located is located above the plane where the upper end surface of the cushion block 36 is located.

[0032] Depend on Figure 1 , Figure 2 and Figure 8As shown, the flow plate 2 is provided with a positioning hole 21 that opens downward and corresponds to the positioning pin 39. Two positioning pins 39 are provided on the lifting plate 33, and a positioning hole 21 is provided at each of the four corners of the flow plate 2. The distance between two adjacent positioning holes 21 is the same, and the two positioning pins 39 are used to cooperate with the two positioning holes diagonally opposite the flow plate 2. The line between two adjacent positioning holes 21 of the flow plate 2 is inclined to the side of the square flow plate. The flow plate 2 is provided with a positioning sleeve 22 that penetrates from top to bottom to form the positioning hole 21, and the flow plate 2 is provided with a second through hole that penetrates from top to bottom to accommodate the positioning sleeve 22.

[0033] Depend on Figures 1 to 4 As shown, the detection mechanism 4 includes a downward pressure driving mechanism 41, and the downward pressure driving mechanism 41 has a second lifting rod 42 arranged vertically, and a detection pressure head 43 is fixed at the lower end of the second lifting rod 42, and the lower end surface of the detection pressure head 43 is concave to form a ventilation groove 44, and a ventilation hole 45 is provided on the side wall of the detection pressure head 43, which penetrates inside and outside, and one end of the ventilation hole 45 is connected to the ventilation groove 44, and the other end of the ventilation hole 45 is connected to the air source through an air pipe. An annular elastic sealing pad (not shown in the figure) is fixed to the lower side of the detection pressure head 43, and the lower end surface of the detection pressure head 43 is concave upward to form a fixed groove 431, which is connected to the ventilation groove 44, and the thickness of the elastic sealing pad is greater than the depth of the fixed groove 431, and the lower end surface of the elastic sealing pad is located below the lower end surface of the detection pressure head 43.

[0034] Depend on Figure 1 , Figure 2 and Figure 5 As shown, the positioning mechanism 3 includes a fixed plate 34, the lifting drive mechanism 31 is fixed to the middle of the fixed plate 34, and four guide mechanisms are arranged between the fixed plate 34 and the lifting plate 33, and the guide mechanism includes a vertically arranged guide rod 35. The fixed plate 34 is provided with a first through hole for the guide rod 35 to pass through, and a guide sleeve 37 is fixed in the first through hole, and the guide rod 35 is always located in the guide sleeve 37.

[0035] Depend on Figures 5 to 7 As shown, the cross-section of the upper section of the positioning pin 39 has a long direction and a short direction. The width of the upper section of the positioning pin 39 along the short direction is smaller than the inner diameter of the positioning hole 21. A contact surface 391 is provided at each end of the upper section of the positioning pin 39 along the long direction. The width of the upper section of the positioning pin 39 along the long direction gradually increases from top to bottom. The minimum width of the upper section of the positioning pin 39 along the long direction is smaller than the inner diameter of the positioning hole 21, and the maximum width of the upper section of the positioning pin 39 along the long direction is greater than the inner diameter of the positioning hole 21; when the upper end of the upper section of the positioning pin 39 extends into the positioning hole 21, the contact surface 391 contacts the lower end of the inner wall of the positioning hole 21; the contact surface 39 is arranged in an arc surface, and the arc opening formed by the cross section of the contact surface 39 faces the axis of the positioning pin 39.

[0036] The frame of the assembly line 1 includes two frames 11 on opposite left and right sides. Both frames 11 are provided with a conveyor belt 12 arranged along the front-to-back direction and used to transport the flow plate 2. The left and right ends of the fixed plate 34 are respectively fixed to a frame 11, and the front and rear ends of the fixed plate 34 are bent downward to form a bending portion 38.

[0037] A blocking mechanism is provided at the front side of the positioning mechanism 3, and the blocking mechanism includes a blocker 51 for limiting the flow plate 2 from moving forward. The blocker 51 is electrically connected to the positioning sensor. When the flow plate moves below the detection mechanism 4, the positioning sensor is triggered so that the blocker 51 limits the movement of the flow plate. The positioning sensor in this embodiment is a photoelectric sensor.

[0038] The air tightness detection device for the assembly line of this embodiment is used for air tightness detection of the motor 6. A motor positioning seat 61 is fixed on the flow plate 2. The motor 6 is vertically arranged and placed on the motor positioning seat 61. The output shaft 62 of the motor 6 extends upward. The upper groove wall of the ventilation groove of the detection pressure head 43 extends upward to form a clearance groove 46 for making way for the output shaft 62 of the motor 6. The motor of this embodiment has only the front end of the output shaft extending outside the motor housing. If it is used for a double-output shaft motor, the motor positioning seat 61 can be provided with a groove for making way for the output shaft at the other end. A sealing gasket can also be provided between the motor positioning seat 61 and the motor. The sealing between the two ends of the motor and the motor positioning seat 61 and the detection pressure head 43 is achieved by pressing the detection pressure head 43.

[0039] The lifting drive mechanism 31 and the pressing drive mechanism 41 of the present embodiment are both cylinders, and the blocker 51 is a commercially available assembly line blocker, which is also a type of cylinder.

[0040] When the device of the present invention is used, the motor is placed on the motor positioning seat of the flow plate, and the motor is driven by the flow plate to move so that the flow plate enters the detection area and moves to the bottom of the detection device. After the positioning sensor detects that the flow plate is in place, the jacking drive mechanism of the positioning mechanism drives the lifting plate to move upward so that the positioning pin cooperates with the positioning hole, and the cushion block lifts the flow plate to move the flow plate upward to separate from the conveyor belt of the assembly line. Then the downward pressure drive mechanism works, and the detection pressure head presses down on the front end cover of the motor and covers the output shaft of the motor. Then, the air source supplies air and performs subsequent detection processes of maintaining pressure and detecting pressure size.

[0041] The present invention has the advantages of reducing the labor intensity of workers, having high detection efficiency and high detection accuracy, and being easy to realize automated detection.

Claims

1. An air tightness detection device for an assembly line, comprising an assembly line and a flow plate arranged on the assembly line, characterized in that The assembly line is provided with a positioning mechanism and a detection mechanism, the detection mechanism is located above the positioning mechanism, and the flow plate can move between the positioning mechanism and the detection mechanism under the action of the assembly line, the positioning mechanism includes a jacking drive mechanism and at least two positioning pins extending upward, the jacking drive mechanism has a first lifting rod arranged vertically, a lifting plate is arranged at the top of the first lifting rod, the positioning pin is fixed on the lifting plate, the flow plate is provided with a positioning hole opening downward and corresponding to the positioning pin, the detection mechanism includes a downward pressing drive mechanism, the downward pressing drive mechanism has a second lifting rod arranged vertically, a detection pressure head is fixed at the lower end of the second lifting rod, the lower end surface of the detection pressure head is concave to form a ventilation groove, the detection pressure head is provided with a ventilation hole running through inside and outside, one end of the ventilation hole is connected to the ventilation groove, and the other end of the ventilation hole is connected to the air source through the air supply pipe; the positioning mechanism includes a fixing plate, The lifting drive mechanism is fixed to the fixed plate, and a plurality of guide mechanisms are provided between the fixed plate and the lifting plate, and the guide mechanism includes a vertically arranged guide rod; a pad is fixed to the upper side of the lifting plate, and the plane where the upper edge of the positioning pin is located is located above the plane where the upper end face of the pad is located; the cross-section of the upper section of the positioning pin has a long direction and a short direction, and the width of the upper section of the positioning pin along the short direction is smaller than the inner diameter of the positioning hole, and a contact surface is provided at each end of the upper section of the positioning pin along the long direction, and the width of the upper section of the positioning pin along the long direction gradually increases from top to bottom, the minimum width of the upper section of the positioning pin along the long direction is smaller than the inner diameter of the positioning hole, and the maximum width of the upper section of the positioning pin along the long direction is larger than the inner diameter of the positioning hole; when the upper end of the positioning pin extends into the positioning hole, the contact surface contacts the lower end of the inner wall of the positioning hole; the contact surface is an arc surface, and the arc formed by the cross-section of the contact surface opens toward the axis of the positioning pin.

2. The air tightness detection device for pipeline according to claim 1 is characterized in that A blocking mechanism is provided on the front side of the positioning mechanism, and the blocking mechanism includes a blocker for limiting the flow plate from moving forward further. The blocker is electrically connected to the positioning sensor. When the flow plate moves below the detection mechanism, the positioning sensor is triggered, so that the blocker limits the movement of the flow plate.

3. The air tightness detection device for pipeline according to claim 1, characterized in that The lifting plate is provided with two positioning pins, and the four corners of the flow plate are respectively provided with a positioning hole, the distance between two adjacent positioning holes is the same, and the two positioning pins are used to cooperate with the two positioning holes diagonally opposite the flow plate; the connecting line between two adjacent positioning holes of the flow plate is inclined to the side of the square flow plate.

4. The air tightness detection device for an assembly line according to claim 1, characterized in that The frame of the assembly line includes two frames on opposite sides. The left and right ends of the fixed plate are respectively fixed to one frame. The front end and the rear end of the fixed plate are bent downward.

5. The air tightness detection device for pipeline according to claim 1, characterized in that The fixing plate is provided with a first through hole for the guide rod to pass through, a guide sleeve is fixed in the first through hole, and the guide rod is always located in the guide sleeve.

6. The air tightness detection device for pipeline according to claim 1, characterized in that The flow plate is provided with a positioning sleeve which opens downwards, and the positioning sleeve is provided with the positioning hole.

7. The air tightness detection device for an assembly line according to claim 1, characterized in that An annular elastic sealing pad is fixed on the lower side of the detection pressure head; the lower end surface of the detection pressure head is concave upward to form a fixing groove, the fixing groove is connected to the ventilation groove, and the thickness of the elastic sealing pad is greater than the depth of the fixing groove, and the lower end surface of the elastic sealing pad is located below the lower end surface of the detection pressure head.

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