Air tightness testing device

Abstract

The utility model provides an air tightness testing device, and belongs to the technical field of air tightness detection equipment. The connecting piece is connected with the moving device, and the connecting piece can be driven by the moving device to reciprocate in the vertical direction; the air inlet connector is arranged at the lower end of the connecting piece, and the air inlet connector is used for being connected with an air inlet hole of the motor to inflate the motor; the sealing piece is arranged on the lower end face of the connecting piece, and the sealing piece is used for sealing the through hole of the motor; according to the utility model, the air inlet joint and the sealing member are arranged on the connecting member at the same time, and the through hole is sealed by the sealing member while the air inlet joint is communicated with the air inlet hole under the driving of the moving device, so that the through hole of the motor does not need to be manually sealed, the test efficiency is accelerated, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air tightness detection equipment, in particular to an air tightness testing device. Background Art

[0002] The automobile wiper motor is driven by an electric motor, and the connecting rod mechanism converts the rotation of the motor into the reciprocating motion of the wiper arm, thereby realizing the wiper action. Among them, the air tightness test of the motor is one of the important processes of the motor.

[0003] The air tightness testing equipment in the prior art is mainly used to test motors that only have air inlets. During the test, the air inlet connector is connected to the air inlet, and then air is introduced. After reaching a certain pressure, wait for a period of time and then check whether the test pressure meets the standard.

[0004] However, a certain type of motor has, in addition to the air inlet hole, other through holes connected to the interior. Therefore, in addition to connecting the air inlet connector to the air inlet hole of the motor, the air tightness testing equipment also needs to seal the through hole. The equipment in the prior art cannot automatically seal the through hole and requires manual sealing operation. Utility Model Content

[0005] Therefore, the technical problem to be solved by the utility model is to overcome the defect that the air tightness testing equipment in the prior art can only connect to the air inlet hole but cannot seal other through holes at the same time, thereby providing an air tightness testing device.

[0006] In order to solve the above technical problems, the utility model provides an airtightness testing device, comprising:

[0007] Mobile devices;

[0008] A bottom plate, arranged below the mobile device, and used for placing and fixing the product to be tested;

[0009] A connecting member connected to the moving device, the connecting member can reciprocate along the vertical direction under the drive of the moving device;

[0010] An air inlet connector is provided at the lower end of the connector and is used to connect with the air inlet hole of the product to be tested to inflate the product to be tested;

[0011] A sealing member, arranged on the lower end surface of the connecting member, and used for sealing the through hole of the product to be tested;

[0012] When the moving device drives the connecting piece to move downward and the air inlet joint is connected with the air inlet hole, the lower end surface of the sealing piece abuts against the through hole for sealing.

[0013] Preferably, there are two sealing members which are symmetrically arranged.

[0014] Preferably, the connecting member has a receiving groove for receiving the sealing member, and the sealing member is arranged in the receiving groove of the connecting member through a first elastic member, and the first elastic member has a force that drives the sealing member to always move toward one side of the through hole.

[0015] Preferably, the lower end surface of the sealing member is provided with a groove for embedding into the through hole.

[0016] Preferably, the groove is a stepped groove.

[0017] Preferably, the lower end surface of the connecting member has a limiting member for abutting against the upper end surface of the product to be tested and fixing the product to be tested, and two limiting members are symmetrically arranged.

[0018] Preferably, the limiting member is connected to the connecting member via a second elastic member, and the second elastic member has a force that drives the limiting member to always move toward the product to be tested.

[0019] Preferably, a limit block is provided on the outer side surface of the connecting piece extending horizontally outward, a pressure rod is extended from the upper end surface of the limit piece toward the limit block, the pressure rod passes through the limit block, the second elastic piece is sleeved on the pressure rod, and the upper end surface of the pressure rod has a clamping piece for limiting the pressure rod from detaching from the limit block.

[0020] Preferably, the moving device comprises: a driving member and a fixing plate, the driving member is fixedly arranged on the fixing plate, and the connecting member is connected to the driving end of the driving member.

[0021] Preferably, the connecting member has a guide rod extending toward the fixing plate, and the guide rod passes through the fixing plate.

[0022] The technical solution of the utility model has the following advantages:

[0023] 1. The air tightness testing device provided by the utility model, by simultaneously arranging an air intake joint and a sealing member on the connecting member, when the air intake joint is connected to the air intake hole under the drive of the moving device, the sealing member seals the through hole, so there is no need to manually seal the through hole of the motor, thereby speeding up the test efficiency and reducing the labor intensity.

[0024] 2. The air tightness testing device provided by the utility model has two automobile wiper motors symmetrically arranged on the left and right, and the through holes of the two types of motors are also symmetrically designed, that is, two symmetrical seals can test two different types of motors, thereby increasing the versatility of the test.

[0025] 3. In the airtightness testing device provided by the utility model, when the sealing member abuts against the through hole, the first elastic member is forced to contract, and at the same time, the elastic force of the first elastic member causes the sealing member to abut against the through hole, thereby enhancing the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A three-dimensional diagram of an airtightness testing device provided in one embodiment of the utility model;

[0028] Figure 2 for Figure 1 A three-dimensional diagram of the motor in

[0029] Figure 3 for Figure 1 A top view of the connector in

[0030] Figure 4 for Figure 3 AA section view in the figure,

[0031] Figure 5 for Figure 3 A three-dimensional diagram of a connecting member in FIG.

[0032] Figure 6 for Figure 1 A three-dimensional diagram of the airtightness test device.

[0033] Description of reference numerals:

[0034] 1. Moving device; 2. Bottom plate; 3. Connecting piece; 4. Air inlet connector; 5. Sealing piece; 6. Through hole; 7. Extension column; 8. Rotating shaft; 9. Motor: 10. Limiting piece; 11. Limiting block; 12. Driving piece; 13. Fixing plate; 14. Support column; 15. Guide rod; 16. Solenoid valve; 17. Cover plate; 18. Receiving groove; 19. Pressure rod; 20. Snap-on piece; 21. Air inlet; 22. Workbench; 23. Detector. DETAILED DESCRIPTION

[0035] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0039] The air tightness testing device provided in this embodiment is used to perform air tightness testing on an automobile motor 9 .

[0040] like Figure 1 , Figure 2 As shown, a specific implementation of the air tightness test device provided in this embodiment includes: a moving device 1; a bottom plate 2 is arranged below the moving device 1, and the bottom plate 2 is used to place and fix the product to be tested; a connecting member 3 is connected to the moving device 1, and the connecting member 3 can reciprocate along the vertical direction under the drive of the moving device 1; an air inlet connector 4 is arranged at the lower end of the connecting member 3, and the air inlet connector 4 is used to connect with the air inlet hole 21 of the product to be tested to inflate the product to be tested; a sealing member 5 is arranged on the lower end surface of the connecting member 3, and the sealing member 5 is used to seal the through hole 6 of the product to be tested. After the product to be tested is placed and fixed on the bottom plate 2, the moving device 1 is started, and the connecting member 3 is driven to move toward the product to be tested until the air inlet connector 4 of the connecting member 3 is connected with the air inlet hole 21, and the sealing member 5 abuts against the through hole 6 to form a comparison through hole 6 seal. Afterwards, the air inlet connector 4 fills air into the product to be tested, stops after reaching a certain pressure, and measures whether the pressure in the product to be tested meets the standard. Specifically, the product to be tested is a wiper motor 9 in a car.

[0041] By simultaneously providing an air intake connector 4 and a sealing member 5 on the connecting member 3, when the mobile device 1 is driven, the air intake connector 4 is connected to the air intake hole 21, and the sealing member 5 seals the through hole 6. This eliminates the need to manually seal the through hole 6 of the product to be tested, thereby speeding up the test efficiency and reducing manual labor intensity.

[0042] In this embodiment, the through hole 6 of the motor 9 is arranged on the upper end surface of the extension column 7 extending outward from the outer end surface of the motor 9. The extension column 7 is a hollow structure connected to the inside of the motor 9. A bearing is arranged on the extension column 7, and a rotating shaft 8 is rotatably arranged on the bearing.

[0043] like Figure 3 , Figure 4 As shown, in this embodiment, there are two seals 5 symmetrically arranged. Since the automobile wiper motors 9 are two symmetrically arranged, the through holes 6 of the two types of motors 9 are also symmetrically designed, that is, the two symmetrical seals 5 can test the two different types of motors 9, which increases the versatility of the test. In addition, as an alternative embodiment, only one seal 5 can be provided.

[0044] like Figure 4 As shown, in this embodiment, the connector 3 has a receiving groove 18 for receiving the sealing member 5, one end of the sealing member 5 is connected to the first elastic member, one end of the first elastic member is connected to the receiving groove 18 of the connector 3, and the first elastic member has a force that drives the sealing member 5 to always move toward the side of the through hole 6. When the sealing member 5 abuts against the through hole 6, the first elastic member is forced to shrink, and at the same time, the elastic force of the first elastic member causes the sealing member 5 to abut against the through hole 6, thereby enhancing the sealing effect. Among them, the first elastic member is a spring. In addition, as a replaceable embodiment, the sealing member 5 can be directly fixed to the lower end face of the connector 3. In addition, as a replaceable embodiment, the first elastic member can be set as an elastic gasket.

[0045] Specifically, the cross-section of the receiving groove 18 is circular, the upper end of the receiving groove 18 is open, and the lower end is provided with an annular flange with a diameter smaller than the diameter of the receiving groove 18. The seal 5 is placed from the upper end of the receiving groove 18 and falls onto the annular flange. After the spring is placed, a cover plate 17 is threadedly connected to the opening of the receiving groove 18, and the lower end of the cover plate 17 abuts against the spring.

[0046] like Figure 4 As shown, in this embodiment, the lower end surface of the sealing member 5 is provided with a groove for embedding into the through hole 6, and the extension column 7 extends into the groove during connection, and the upper end surface of the extension column 7 abuts against the lower end surface of the groove to form a seal, thereby improving the sealing effect of the through hole 6. In addition, as an alternative embodiment, a cylinder is provided on the lower end surface of the sealing member 5, and the cylinder is inserted into the through hole 6 of the motor 9 to form a seal.

[0047] like Figure 4 As shown, in this embodiment, the groove is a stepped groove, wherein the diameter of the lower half of the stepped groove is larger than that of the upper half of the stepped groove, the upper end surface of the extension column 7 abuts against the upper end surface of the lower half, and the rotating shaft 8 connected to the bearing extends into the upper half of the stepped groove. In addition, as an alternative embodiment, the groove may not be provided with a stepped groove, but a circular groove.

[0048] like Figure 4 , Figure 5 As shown, in this embodiment, the lower end face of the connecting member 3 has a stopper 10 for abutting against the upper end face of the motor 9 and fixing the motor 9. The stopper 10 has two symmetrically arranged stoppers 10, and the two stoppers 10 respectively abut against two different types of motors 9. That is, when the mobile device 1 drives the connecting member 3 to move, one of the stoppers 10 abuts against the side of the motor 9 away from the bottom plate 2, so as to avoid the shaking of the motor 9 during the test and cause inaccurate test results. In addition, as an alternative embodiment, the lower end face of the connecting member 3 may not be provided with a stopper 10, and the motor 9 is fixed by the bottom plate 2.

[0049] like Figure 5 As shown, in this embodiment, the limiter 10 is connected to the connecting member 3 through the second elastic member, and the second elastic member has a force that drives the limiter 10 to always move toward the motor 9. When the limiter 10 abuts against the motor 9, the second elastic member is compressed. At this time, the elastic force of the second elastic member drives the limiter 10 to abut against the motor 9. At this time, the fixation is more firm, and the rigid contact between the limiter 10 and the motor 9 can be avoided. Among them, the second elastic member is a spring. In addition, as an alternative embodiment, the second elastic member can be set as an elastic gasket.

[0050] like Figure 5As shown, in this embodiment, the outer side surface of the connecting member 3 is provided with a limit block 11 extending outward horizontally, and the limit block 11 is provided on the side away from the air inlet connector 4. A pressure rod 19 is extended from the upper end surface of the limit member 10 toward the limit block 11, and the pressure rod 19 passes through the limit block 11 and slides in the limit block 11. The second elastic member is sleeved on the pressure rod 19, one end of the second elastic member abuts against the lower end surface of the limit block 11, and the other end abuts against the upper end surface of the limit member 10. When the limit member 10 abuts against the motor 9, the second elastic member is compressed by force, and at this time, the pressure rod 19 slides upward in the limit block 11 for a certain distance. The upper end surface of the pressure rod 19 has a clamping member 20 for limiting the pressure rod 19 from being separated from the limit block 11. Specifically, the clamping member 20 is a nut. The clamping member 20 is screwed to the upper end of the pressure rod 19 and abuts against the upper end surface of the limit block 11, which serves as a limit to the axial movement of the pressure rod 19 to prevent the pressure rod 19 from being separated from the limit block 11 under the action of the second elastic member. The second elastic member is a spring, which is hidden in the accompanying drawings. In addition, as an alternative embodiment, the limit block 11 may not be provided, and the limit member 10 is connected to the connecting member 3 via the second elastic member.

[0051] like Figure 1 As shown, in this embodiment, the moving device 1 includes: a driving member 12 and a fixed plate 13, the driving member 12 is fixedly arranged on the fixed plate 13, and two pillars 14 are respectively arranged at both ends of the fixed plate 13 to support the fixed plate 13. The connecting member 3 is connected to the driving end of the driving member 12. Among them, the driving member 12 is a cylinder. The connecting member 3 is driven by the cylinder to move, and the movement of the cylinder is more reliable and simple to operate, and the cylinder maintenance is less. In addition, as a replaceable embodiment, the driving member 12 is an electric cylinder. In addition, as a replaceable embodiment, the driving member 12 is a motor 9, and the motor 9 is threadedly connected to the connecting member 3 through a screw.

[0052] like Figure 1 As shown, in this embodiment, the connecting member 3 has a guide rod 15 extending toward the fixing plate 13, and the guide rod 15 passes through the fixing plate 13. When moving, the guide rod 15 can serve as a guide limit for the movement of the connecting member 3. In addition, as an alternative embodiment, the guide rod 15 may not be provided, and the connecting member 3 may be directly driven by the cylinder to move.

[0053] Installation method of airtightness test device: Figure 6As shown, the workbench 22 is detachably connected to the base plate 2. The motor 9 is placed on the base plate 2 and fixed by bolts. A fixing plate 13 is arranged directly above the base, and the fixing plate 13 is fixed to the workbench 22 by two columns. A driving member 12 and a solenoid valve 16 are arranged on the fixing plate 13, and the solenoid valve 16 is connected to the air inlet connector 4 of the connecting member 3. The driving end of the driving member 12 is connected to the connecting member 3, and the lower end surface of the connecting member 3 is provided with an air inlet connector 4. Two grooves are arranged in the connecting member 3, and two sealing members 5 are arranged in the two grooves by springs. The upper end surface of the connecting member 3 is fixedly connected to a guide rod 15, and the guide rod 15 passes through the fixing plate 13. A limit block 11 is arranged on the side end surface of the connecting member 3 extending horizontally outward, and the lower end surface of the limit block 11 is connected to the limit member 10 by a spring.

[0054] An air inlet 21 is provided on one side of the motor 9, an extension column 7 is provided beside the air inlet 21, and a through hole 6 is provided on the upper end surface of the extension column 7. The through hole 6 and the air inlet 21 extend in the same direction, that is, the axes of the two are parallel. When the driving member 12 is started, the connecting member 3 moves downward, and the guide rod 15 of the connecting member 3 slides in the fixing plate 13. When the limit member 10 of the connecting member 3 abuts against the motor 9, the spring is compressed. At this time, the air inlet connector 4 is connected with the air inlet 21 of the motor 9, and the sealing member 5 seals the through hole 6. The solenoid valve 16 opens, and the air inlet connector 4 starts to take in air. When a certain pressure is reached, the test value is displayed by the detector 23 to check whether the motor 9 is qualified. After the detection is completed, when the driving member 12 drives the connecting member 3 to move upward, since the air intake connector 4 is plugged into the clicked air intake hole 21, the movement of the air intake connector 4 when it is pulled out can easily drive the motor 9 to move upward; and at this time, the limiting member 10 abuts against the motor 9 under the action of the second elastic member, and when it is pulled out, the limiting member 10 abuts against the motor 9 to fix it, preventing the motor 9 from moving when the air intake connector 4 is pulled out. After being pulled out, the connecting member 3 continues to move upward and the limiting member 10 also breaks away from the contact with the motor 9.

[0055] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the present utility model.

Claims

1. An airtightness testing device, characterized in that: include: Mobile device (1); A connecting member (3) connected to the moving device (1), wherein the connecting member (3) is capable of reciprocating in a vertical direction under the drive of the moving device (1); An air inlet connector (4) is arranged at the lower end of the connecting member (3), and the air inlet connector (4) is used to connect to the air inlet hole (21) of the product to be tested to inflate the product to be tested; A sealing member (5) is arranged on the lower end surface of the connecting member (3), and the sealing member (5) is used to seal the through hole (6) of the product to be tested; When the moving device (1) drives the connecting member (3) to move downward and the air inlet joint (4) is connected to the air inlet hole (21), the lower end surface of the sealing member (5) abuts against the through hole (6) to seal.

2. The airtightness testing device according to claim 1, characterized in that: The sealing members (5) have two symmetrically arranged ones.

3. The airtightness testing device according to claim 2, characterized in that: The connecting member (3) has a receiving groove (18) for receiving the sealing member (5); the sealing member (5) is arranged in the receiving groove (18) of the connecting member (3) via a first elastic member; the elastic member has a force for driving the sealing member (5) to always move toward one side of the through hole (6).

4. The airtightness testing device according to claim 3, characterized in that: The lower end surface of the sealing member (5) is provided with a groove for embedding into the through hole (6).

5. The airtightness testing device according to claim 4, characterized in that: The groove is a stepped groove.

6. The airtightness testing device according to any one of claims 1 to 5, characterized in that: The lower end surface of the connecting member (3) has a limiting member (10) for abutting against the upper end surface of the product to be tested and fixing the product to be tested, and two limiting members (10) are symmetrically arranged.

7. The airtightness testing device according to claim 6, characterized in that: The limiting member (10) is connected to the connecting member (3) via a second elastic member, and the second elastic member has a force that drives the limiting member (10) to always move toward the product to be tested.

8. The airtightness testing device according to claim 7, characterized in that: A limit block (11) is provided on the outer side surface of the connecting member (3) extending outwardly in a horizontal direction, a pressure rod (19) is extended from the upper end surface of the limit member (10) toward the limit block (11), the pressure rod (19) passes through the limit block (11), the second elastic member is sleeved on the pressure rod (19), and the upper end surface of the pressure rod (19) has a clamping member (20) for limiting the pressure rod (19) from being separated from the limit block (11).

9. The airtightness testing device according to any one of claims 1 to 5, characterized in that: The moving device (1) comprises: a driving member (12) and a fixing plate (13); the driving member (12) is fixedly arranged on the fixing plate (13); and the connecting member (3) is connected to the driving end of the driving member (12).

10. The airtightness testing device according to claim 9, characterized in that: The connecting member (3) has a guide rod (15) extending toward the fixing plate (13), and the guide rod (15) passes through the fixing plate (13).

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