CN208239019U - Positioning mechanism and leak tester with it - Google Patents

Abstract

The utility model provides a kind of positioning mechanism and the leak tester with it, and positioning mechanism is used to position the leak detection portion of leak tester, so that leak detection portion carries out leak detection operation to product, positioning mechanism includes: the first positioning component；Second positioning component, the second positioning component are movably disposed on the first positioning component along the first preset direction；Third positioning component, third positioning component are movably disposed on the second positioning component along the second preset direction；Third positioning component has the third mounting portion for connecting with leak detection portion, so that leak detection portion moves under the drive of third mounting portion along third preset direction；Wherein, the setting that the first preset direction, the second preset direction and third preset direction are mutually orthogonal to one another.The positioning mechanism of the utility model solves the problems, such as leak tester leak detection low efficiency in the prior art.

Description

Positioning mechanism and leak tester with it

Technical field

The utility model relates to field of mechanical technique, in particular to a kind of positioning mechanism and with its leak tester.

Background technique

Currently, generalling use robot when carrying out leak detection operation to product and hunt leak or examined using leak tester Leakage.

However, robot leak detection has high production cost, also, existing leak tester cannot achieve precisely quickly Positioning, inconvenient, efficiency is lower.

Utility model content

The main purpose of the utility model is to provide a kind of positioning mechanism and with its leak tester, to solve existing skill Leak tester in art hunt leak low efficiency the problem of.

To achieve the goals above, one aspect according to the present utility model provides a kind of positioning mechanism, for positioning The leak detection portion of leak tester, so that leak detection portion carries out leak detection operation to product, positioning mechanism includes: the first positioning component；Second is fixed Hyte part, the second positioning component are movably disposed on the first positioning component along the first preset direction；Third positioning component, the Three positioning components are movably disposed on the second positioning component along the second preset direction；Third positioning component have for inspection The third mounting portion of leakage portion connection, so that leak detection portion moves under the drive of third mounting portion along third preset direction；Wherein, first The setting that preset direction, the second preset direction and third preset direction are mutually orthogonal to one another.

Further, the first positioning component includes the first mounting rack and the first driving section for being mounted on the first mounting rack, First driving section includes the first turn-screw and the first transmission nut for being set on the first turn-screw, the first transmission nut with Second positioning component connection, so that the second positioning component is under the action of the first turn-screw and the first transmission nut along level side It moves left and right.

Further, the first positioning component includes the first driving motor, and the first driving motor is mounted on the first mounting rack, First driving motor and the first turn-screw are drivingly connected, to drive the rotation of the first turn-screw.

Further, the first positioning component includes multiple first guide rods and the first peace for being set in each first guide rod Dress portion, multiple first guide rods are mounted on the first mounting rack and are arranged in the two sides of the first turn-screw, the first mounting portion with First transmission nut connection, so that the first mounting portion is mobile in multiple first guide rods of drive lower edge of the first transmission nut；The Two positioning components are connect with the first mounting portion, so that the second positioning component moves under the drive of the first mounting portion.

Further, the first positioning component includes multiple first detectors, and multiple first detectors are along the first preset direction Interval setting, the second positioning component have for the first detection plate corresponding with multiple first detectors, to pass through multiple the The position that one detector incudes the first detection plate makes the second positioning component be located in predetermined position；Multiple first detectors include one A first zero detector and two first end position detectors, first end position detector are oppositely arranged on first zero detector Two sides, when the first detection plate moves to the position opposite with first zero detector, to make the second positioning component be in initial Position, and by the relativeness between the first detection plate and two first end position detectors, make the second positioning component at two It is moved in the distance between first end position detector range.

Further, the second positioning component includes the second mounting rack and the second driving section for being mounted on the second mounting rack, Second mounting rack is at least partly connect with the first driving section, and the second driving section includes the second turn-screw and is set in the second biography The second transmission nut on dynamic lead screw, the second transmission nut is connect with third positioning component, so that third positioning component is second It is gone up and down along the vertical direction under the action of turn-screw and the second transmission nut.

Further, the second positioning component includes the second driving motor, and the second driving motor is mounted on the second mounting rack, Second driving motor and the second turn-screw are drivingly connected, to drive the rotation of the second turn-screw.

Further, the second positioning component includes multiple second guide rods and the second peace for being set in each second guide rod Dress portion, multiple second guide rods are mounted on the second mounting rack and are arranged in the two sides of the second turn-screw, the second mounting portion with Second transmission nut connection, so that the second mounting portion is mobile in multiple second guide rods of drive lower edge of the second transmission nut；The Three positioning components are connect with the second mounting portion, so that third positioning component moves under the drive of the second mounting portion.

Further, the second positioning component includes multiple second detectors, and multiple second detectors are along the second preset direction Interval setting, third positioning component have for the second detection plate corresponding with multiple second detectors, to pass through multiple the The position that two detectors incude the second detection plate makes third positioning component be located in predetermined position；Multiple second detectors include one A second zero point detector and two second end position detectors, second end position detector are oppositely arranged on the second zero point detector Two sides, when the second detection plate moves to the position opposite with the second zero point detector, to make third positioning component be in initial Position, and by the relativeness between the second detection plate and two second end position detectors, make third positioning component at two It is moved in the distance between second end position detector range.

Further, third positioning component includes third mounting rack and the third driving section that is mounted on third mounting rack, The top of second mounting rack at least partly connecting with the second driving section and be located at the first positioning component, third driving section include the Three turn-screws and the third transmission nut being set on third turn-screw, third transmission nut are connect with leak detection portion, so that Leak detection portion is moved forward and backward under the action of third turn-screw and third transmission nut along first direction.

Further, third positioning component includes third driving motor, and third driving motor is mounted on third mounting rack, Third driving motor and third turn-screw are drivingly connected, to drive third turn-screw to rotate.

Further, third positioning component includes multiple third guide rods, and multiple third guide rods are mounted on third installation On frame and the two sides of third turn-screw are set, third mounting portion is set on each third guide rod and is driven spiral shell with third Mother's connection, so that third mounting portion is mobile in the multiple third guide rods of drive lower edge of third transmission nut.

Further, third positioning component includes multiple third detectors, and multiple third detectors are along third preset direction Interval setting, leak detection portion have for third detection plate corresponding with multiple third detectors, to be detected by multiple thirds The position of head induction third detection plate makes leak detection portion be located in predetermined position；Multiple third detectors include a third zero point inspection Gauge head and two third ends position detectors, third end position detector are oppositely arranged on the two sides of third zero point detector, the When three detection plates move to the position opposite with third zero point detector, third positioning component is set to be in initial position, and pass through Relativeness between third detection plate and two third ends position detector makes leak detection portion between the detector of two third ends position Distance range in move.

Another aspect according to the present utility model, provides a kind of leak tester, including leak detection portion and for positioning the leak detection The positioning mechanism in portion, wherein positioning mechanism is above-mentioned positioning mechanism.

The positioning mechanism of the utility model passes through the first positioning component of setting, the second positioning component and third positioning component, And it connect leak detection portion with the third mounting portion of third positioning component, leak detection portion can be made to preset in the first preset direction, second It is moved on direction and third preset direction, to determine position of the leak detection portion on above three direction.The positioning mechanism can be with needle Leak detection operation is carried out to the predetermined leak detection position of different location, can be adapted for the product of different model, realizes that different orders produce The quality control of product leakage detecting process, also, the first positioning component, the second positioning component and third positioning component simultaneously operation, can To realize that fast accurate positions, the time is saved.

Detailed description of the invention

The accompanying drawings constituting a part of this application is used to provide a further understanding of the present invention, this is practical Novel illustrative embodiments and their description are not constituteed improper limits to the present invention for explaining the utility model. In the accompanying drawings:

Fig. 1 shows the perspective view of the embodiment of positioning mechanism according to the present utility model；

Fig. 2 shows the front views of the embodiment of positioning mechanism according to the present utility model；

Fig. 3 shows the side view of the embodiment of positioning mechanism according to the present utility model；And

Fig. 4 shows the top view of the embodiment of positioning mechanism according to the present utility model.

Wherein, the above drawings include the following reference numerals:

10, leak detection portion；11, third detection plate；20, the first positioning component；21, the first mounting rack；22, the first driving section； 221, the first turn-screw；222, the first transmission nut；23, the first driving motor；24, the first guide rod；25, the first installation Portion；26, first zero detector；27, first end position detector；30, the second positioning component；31, the second mounting rack；32, second Driving section；321, the second turn-screw；322, the second transmission nut；33, the second driving motor；34, the second guide rod；35, Two mounting portions；36, the second zero point detector；37, second end position detector；38, the first detection plate；40, third positioning component； 41, third mounting rack；42, third driving section；421, third turn-screw；422, third transmission nut；43, third driving electricity Machine；44, third guide rod；45, third mounting portion；46, third zero point detector；47, third end position detector.

Specific embodiment

It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase Mutually combination.The utility model will be described in detail below with reference to the accompanying drawings and embodiments.

The utility model provides a kind of positioning mechanism, and please refer to figs. 1 to 4, for positioning the leak detection portion 10 of leak tester, So that leak detection portion 10 carries out leak detection operation to product, positioning mechanism includes: the first positioning component 20；Second positioning component 30, the Two positioning components 30 are movably disposed on the first positioning component 20 along the first preset direction；Third positioning component 40, third Positioning component 40 is movably disposed on the second positioning component 30 along the second preset direction；Third positioning component 40, which has, to be used for The third mounting portion 45 being connect with leak detection portion 10, so that leak detection portion 10 moves under the drive of third mounting portion 45 along third preset direction It is dynamic；Wherein, the setting that the first preset direction, the second preset direction and third preset direction are mutually orthogonal to one another.

The positioning mechanism of the utility model passes through the first positioning component 20 of setting, the second positioning component 30 and third positioning group Part 40, and it connect leak detection portion 10 with the third mounting portion 45 of third positioning component, leak detection portion 10 can be made in the first default side It is moved on, the second preset direction and third preset direction, to determine position of the leak detection portion 10 on above three direction.This is fixed Position mechanism can carry out leak detection operation for the predetermined leak detection position of different location, can be adapted for the product of different model, real The quality control of existing different order product leakage detecting process, also, the first positioning component 20, the second positioning component 30 and third positioning Component 40 moves at the same time, and fast accurate positioning may be implemented, save the time.

In order to realize the movement of the second positioning component 30, as shown in Figure 1, the first positioning component 20 includes the first mounting rack 21 With the first driving section 22 being mounted on the first mounting rack 21, the first driving section 22 includes the first turn-screw 221 and is set in The first transmission nut 222 on first turn-screw 221, the first transmission nut 222 are connect with the second positioning component 30, so that the Two positioning components 30 move left and right in the horizontal direction under the action of the first turn-screw 221 is with the first transmission nut 222.

In order to drive the first turn-screw 221, as depicted in figs. 1 and 2, the first positioning component 20 includes the first driving motor 23, the first driving motor 23 is mounted on the first mounting rack 21, and the first driving motor 23 and the driving of the first turn-screw 221 connect It connects, to drive the rotation of the first turn-screw 221.

When it is implemented, as shown in Figure 1, the first positioning component 20 includes multiple first guide rods 24 and is set in each the First mounting portion 25 of one guide rod 24, multiple first guide rods 24 are mounted on the first mounting rack 21 and are arranged in the first transmission The two sides of lead screw 221, the first mounting portion 25 are connect with the first transmission nut 222, so that the first mounting portion 25 is driven spiral shell first Multiple first guide rods 24 of the drive lower edge of mother 222 are mobile；Second positioning component 30 is connect with the first mounting portion 25, so that second Positioning component 30 moves under the drive of the first mounting portion 25.It is such setting play the role of support the second positioning component 30 and The second positioning component can be driven to move along the first preset direction.

In the present embodiment, as depicted in figs. 1 and 2, the first positioning component 20 include multiple first detectors, multiple first Detector is arranged along the first preset direction interval, and the second positioning component 30 has for corresponding with multiple first detectors the One detection plate 38 is located in the second positioning component 30 with the position for incuding the first detection plate 38 by multiple first detectors pre- Positioning is set；Multiple first detectors include a first zero detector 26 and two first end position detectors 27, first end position Detector 27 is oppositely arranged on the two sides of first zero detector 26, is detected with moving in the first detection plate 38 with the first zero When first 26 opposite position, the second positioning component 30 is set to be in initial position, and pass through the first detection plate 38 and two first ends Position detector 27 between relativeness, make the second positioning component 30 between two first end position detectors 27 apart from range Interior movement.

When it is implemented, the first detection plate 38 moves between two first end position detectors 27, due to the first detection plate 38 are arranged on the second mounting rack 31 of the second positioning component 30, and the moving distance of first detection plate 38 is the second positioning The moving distance of component 30, therefore the second positioning component 30 moves between two first end position detectors 27.

When it is implemented, multiple first detectors are arranged on the first mounting rack 21 and set towards the second positioning component 30 It sets, sends enabling signal to the first driving motor 23 when first end position detector 27 detects the second positioning component 30, so that Second positioning component 30 reverse movement, when first zero detector 26 detects the second positioning component 30 to the first driving motor 23 send pause signal, so that the second positioning component 30 stops movement, that is, are in initial position.

Preferably, the first detector is close to switch.

In order to realize the movement of third positioning component 40, as shown in Figure 1, the second positioning component 30 includes the second mounting rack 31 With the second driving section 32 being mounted on the second mounting rack 31, the second mounting rack 31 at least partly connects with the first driving section 22 It connects, the second transmission nut 322 that the second driving section 32 turn-screw 321 and be set on the second turn-screw 321 including second, Second transmission nut 322 is connect with third positioning component 40, so that third positioning component 40 is in the second turn-screw 321 and second It is gone up and down along the vertical direction under the action of transmission nut 322.

In order to drive the second turn-screw 321, as shown in figures 1 and 3, the second positioning component 30 includes the second driving motor 33, the second driving motor 33 is mounted on the second mounting rack 31, and the second driving motor 33 and the driving of the second turn-screw 321 connect It connects, to drive the rotation of the second turn-screw 321.

When it is implemented, as shown in Figure 1, the second positioning component 30 includes multiple second guide rods 34 and is set in each the Second mounting portion 35 of two guide rods 34, multiple second guide rods 34 are mounted on the second mounting rack 31 and are arranged in the second transmission The two sides of lead screw 321, the second mounting portion 35 are connect with the second transmission nut 322, so that the second mounting portion 35 is driven spiral shell second Multiple second guide rods 34 of the drive lower edge of mother 322 are mobile；Third positioning component 40 is connect with the second mounting portion 35, so that third Positioning component 40 moves under the drive of the second mounting portion 35.It is such setting play the role of support third positioning component 40 and Third positioning component can be driven to move along the second preset direction.

In the present embodiment, as shown in Figure 1, the second positioning component 30 includes multiple second detectors, multiple second detections Head is arranged along the second preset direction interval, and third positioning component 40 has for the second inspection corresponding with multiple second detectors Drafting board makes third positioning component 40 be located in predetermined position with the position for incuding the second detection plate by multiple second detectors； Multiple second detectors include a second zero point detector 36 and two second end position detectors 37, second end position detector 37 The two sides of the second zero point detector 36 are oppositely arranged on, it is opposite with the second zero point detector 36 to be moved in the second detection plate When position, third positioning component 40 is made to be in initial position, and by the second detection plate and two second end position detectors 37 it Between relativeness, make the moving between two second end position detectors 37 in range of third positioning component 40.

When it is implemented, the second detection plate moves between two second end position detectors 37, since the second detection plate is set It sets on the third mounting rack 41 of third positioning component 40, the moving distance of second detection plate is third positioning component 40 Moving distance, therefore third positioning component 40 moves between two second end position detectors 37.

When it is implemented, multiple second detectors are arranged on the second mounting rack 31 and set towards third positioning component 40 It sets, sends enabling signal to the second driving motor 33 when second end position detector 37 detects third positioning component 40, so that Third positioning component 40 moves backward, when the second zero point detector 36 detects third positioning component 40 to the second driving motor 33 send pause signal, so that third positioning component 40 stops movement, that is, are in initial position.

Preferably, the second detector is close to switch.

In order to realize the movement in leak detection portion 10, as shown in Figure 1, third positioning component 40 includes third mounting rack 41 and installation Third driving section 42 on third mounting rack 41, the second mounting rack 31 at least partly connect and are located at the second driving section 32 The top of first positioning component 20, third driving section 42 include third turn-screw 421 and are set on third turn-screw 421 Third transmission nut 422, third transmission nut 422 is connect with leak detection portion 10, so that leak detection portion 10 is in third turn-screw 421 It is moved forward and backward under the action of third transmission nut 422 along first direction.

In order to drive third turn-screw 421, as shown in Figure 1 and Figure 4, third positioning component 40 includes third driving motor 43, third driving motor 43 is mounted on third mounting rack 41, and third driving motor 43 and the driving of third turn-screw 421 connect It connects, to drive third turn-screw 421 to rotate.

When it is implemented, multiple thirds are oriented to as shown in Figure 1, third positioning component 40 includes multiple third guide rods 44 Bar 44 is mounted on third mounting rack 41 and is arranged in the two sides of third turn-screw 421, and third mounting portion 45 is set in each It is connect on third guide rod 44 and with third transmission nut 422, so that drive of the third mounting portion 45 in third transmission nut 422 The multiple third guide rods 44 of lower edge are mobile.Such setting is played the role of supporting leak detection portion 10 and leak detection portion 10 can be driven along the Three preset directions are mobile.

In the present embodiment, as depicted in figs. 1 and 2, third positioning component 40 includes multiple third detectors, multiple thirds Detector is arranged along third preset direction interval, and leak detection portion 10 has to be detected for third corresponding with multiple third detectors Plate 11 makes leak detection portion 10 be located in predetermined position with the position for incuding third detection plate 11 by multiple third detectors；It is multiple Third detector includes a third zero point detector 46 and two third ends position detector 47, and third end position detector 47 is opposite The two sides of third zero point detector 46 are set, to move to the position opposite with third zero point detector 46 in third detection plate 11 When setting, third positioning component 40 is made to be in initial position, and by third detection plate 11 and two third ends detector 47 it Between relativeness, make the moving between the detector 47 of two third ends position in range of leak detection portion 10.

When it is implemented, third detection plate 11 moves between the detector 47 of two third ends position, due to third detection plate 11 are fixedly connected with leak detection portion 10, and the moving distance of the third detection plate 11 is the moving distance in leak detection portion 10, therefore hunt leak Portion 10 moves between the detector 47 of two third ends position.

When it is implemented, multiple third detectors are arranged on third mounting rack 41 and are arranged towards leak detection portion 10, when the Enabling signal is sent to third driving motor 43 when three ends position detector 47 detects leak detection portion 10, so that third positioning component 40 Reverse movement sends pause signal to third driving motor 43 when the second zero point detector 36 detects leak detection portion 10, so that Leak detection portion 10 stops movement, that is, is in initial position.

Preferably, third detector is close to switch.

In one embodiment, as shown in Fig. 2, third detection plate 11 be arranged on third mounting portion 45 and with multiple thirds Detector is corresponding.

When it is implemented, third detection plate 11 moves between the detector 47 of two third ends position, due to third detection plate 11 are fixedly connected and third mounting portion 45 is fixedly connected with leak detection portion 10, the shifting of the third detection plate 11 with third mounting portion 45 Dynamic distance is the moving distance in leak detection portion 10, therefore leak detection portion 10 moves between the detector 47 of two third ends position.

The positioning mechanism of the utility model is tri- axis mechanism of X, Y, Z, and according to dead-center position, host computer provides pulse information can Fast accurate positioning, realizes the quality control of different order product leakage detecting process, three axis concurrently-actings save the time.

The utility model additionally provides a kind of leak tester, the localization machine including leak detection portion 10 and for positioning the leak detection portion 10 Structure, wherein positioning mechanism is the positioning mechanism of above-described embodiment.

It can be seen from the above description that the above embodiments of the utility model achieve the following technical effects:

The positioning mechanism of the utility model passes through the first positioning component 20 of setting, the second positioning component 30 and third positioning group Part 40, and it connect leak detection portion 10 with the third mounting portion 45 of third positioning component, leak detection portion 10 can be made in the first default side It is moved on, the second preset direction and third preset direction, to determine position of the leak detection portion 10 on above three direction.This is fixed Position mechanism can carry out leak detection operation for the predetermined leak detection position of different location, can be adapted for the product of different model, real The quality control of existing different order product leakage detecting process, also, the first positioning component 20, the second positioning component 30 and third positioning Component 40 moves at the same time, and fast accurate positioning may be implemented, save the time.

The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.

Claims (14)

1. a kind of positioning mechanism, for positioning the leak detection portion (10) of leak tester, so that the leak detection portion (10) examines product Leakage operation, which is characterized in that the positioning mechanism includes:

First positioning component (20)；

Second positioning component (30), second positioning component (30) are movably disposed at described first along the first preset direction On positioning component (20)；

Third positioning component (40), the third positioning component (40) are movably disposed at described second along the second preset direction On positioning component (30)；The third positioning component (40) has the third mounting portion for connecting with the leak detection portion (10) (45), so that the leak detection portion (10) is moved in the case where the third mounting portion (45) drives along third preset direction；

Wherein, what first preset direction, second preset direction and the third preset direction were mutually orthogonal to one another sets It sets.

2. positioning mechanism according to claim 1, which is characterized in that first positioning component (20) includes the first installation Frame (21) and the first driving section (22) being mounted on first mounting rack (21), first driving section (22) include first Turn-screw (221) and the first transmission nut (222) being set on first turn-screw (221), first transmission Nut (222) is connect with second positioning component (30), so that second positioning component (30) is in first driving wire It is moved left and right in the horizontal direction under the action of thick stick (221) and first transmission nut (222).

3. positioning mechanism according to claim 2, which is characterized in that first positioning component (20) includes the first driving Motor (23), first driving motor (23) are mounted on first mounting rack (21), first driving motor (23) It is drivingly connected with first turn-screw (221), to drive first turn-screw (221) to rotate.

4. positioning mechanism according to claim 2, which is characterized in that first positioning component (20) includes multiple first Guide rod (24) and the first mounting portion (25) for being set in each first guide rod (24), multiple first guide rods (24) it is mounted on first mounting rack (21) and is arranged in the two sides of first turn-screw (221), first peace Dress portion (25) is connect with first transmission nut (222), so that first mounting portion (25) is in first transmission nut (222) multiple first guide rods (24) of drive lower edge are mobile；Second positioning component (30) and first installation Portion (25) connection, so that second positioning component (30) moves under the drive of first mounting portion (25).

5. positioning mechanism according to claim 1, which is characterized in that first positioning component (20) includes multiple first Detector, multiple first detectors are arranged along the first preset direction interval, and second positioning component (30), which has, to be used for The first detection plate (38) corresponding with multiple first detectors, to incude described the by multiple first detectors The position of one detection plate (38) makes second positioning component (30) be located in predetermined position；The multiple first detector includes One first zero detector (26) and two first end position detectors (27), first end position detector (27) are oppositely arranged In the two sides of the first zero detector (26), detected with being moved in first detection plate (38) with the first zero When head (26) opposite position, second positioning component (30) is set to be in initial position, and pass through first detection plate (38) relativeness between two first end position detectors (27) makes second positioning component (30) at two described It is moved in the distance between one end position detector (27) range.

6. positioning mechanism according to claim 2, which is characterized in that second positioning component (30) includes the second installation Frame (31) and the second driving section (32) being mounted on second mounting rack (31), at least portion of second mounting rack (31) Divide and connect with first driving section (22), second driving section (32) is including the second turn-screw (321) and is set in institute The second transmission nut (322) on the second turn-screw (321) is stated, second transmission nut (322) and the third position Component (40) connection, so that the third positioning component (40) is in second turn-screw (321) and the second transmission spiral shell It is gone up and down along the vertical direction under the action of female (322).

7. positioning mechanism according to claim 6, which is characterized in that second positioning component (30) includes the second driving Motor (33), second driving motor (33) are mounted on second mounting rack (31), second driving motor (33) It is drivingly connected with second turn-screw (321), to drive second turn-screw (321) to rotate.

8. positioning mechanism according to claim 6, which is characterized in that second positioning component (30) includes multiple second Guide rod (34) and the second mounting portion (35) for being set in each second guide rod (34), multiple second guide rods (34) it is mounted on second mounting rack (31) and is arranged in the two sides of second turn-screw (321), second peace Dress portion (35) is connect with second transmission nut (322), so that second mounting portion (35) is in second transmission nut (322) multiple second guide rods (34) of drive lower edge are mobile；The third positioning component (40) and second installation Portion (35) connection, so that the third positioning component (40) moves under the drive of second mounting portion (35).

9. positioning mechanism according to claim 1, which is characterized in that second positioning component (30) includes multiple second Detector, multiple second detectors are arranged along the second preset direction interval, and the third positioning component (40), which has, to be used for The second detection plate corresponding with multiple second detectors, to incude second inspection by multiple second detectors The position of drafting board makes the third positioning component (40) be located in predetermined position；The multiple second detector includes one second Zero point detector (36) and two second end position detectors (37), second end position detector (37) are oppositely arranged on described The two sides of two zero point detectors (36), it is opposite with the second zero point detector (36) to be moved in second detection plate When position, the third positioning component (40) is set to be in initial position, and pass through second detection plate and two second end positions Relativeness between detector (37), make the third positioning component (40) two second end position detectors (37) it Between distance range in move.

10. positioning mechanism according to claim 6, which is characterized in that the third positioning component (40) includes third peace The third driving section (42) shelving (41) and being mounted on the third mounting rack (41), second mounting rack (31) is at least Part connect and is located at the top of first positioning component (20), the third driving section with second driving section (32) (42) the third transmission nut (422) for including third turn-screw (421) and being set on the third turn-screw (421), The third transmission nut (422) connect with the leak detection portion (10), so that the leak detection portion (10) is in the third driving wire It is moved forward and backward under the action of thick stick (421) and the third transmission nut (422) along first direction.

11. positioning mechanism according to claim 10, which is characterized in that the third positioning component (40) includes that third is driven Dynamic motor (43), the third driving motor (43) are mounted on the third mounting rack (41), the third driving motor (43) it is drivingly connected with the third turn-screw (421), to drive the third turn-screw (421) to rotate.

12. positioning mechanism according to claim 10, which is characterized in that the third positioning component (40) includes multiple Three guide rods (44), multiple third guide rods (44) are mounted on the third mounting rack (41) and are arranged in the third The two sides of turn-screw (421), the third mounting portion (45) be set on each third guide rod (44) and with it is described Third transmission nut (422) connection, so that drive lower edge of the third mounting portion (45) in the third transmission nut (422) Multiple third guide rods (44) are mobile.

13. positioning mechanism according to claim 1, which is characterized in that the third positioning component (40) includes multiple Three detectors, multiple third detectors along third preset direction interval be arranged, the leak detection portion (10) have for it is more The corresponding third detection plate (11) of a third detector incudes the third inspection to pass through multiple third detectors The position of drafting board (11) makes the leak detection portion (10) be located in predetermined position；The multiple third detector includes one the 3rd 0 Point detector (46) and two third end position detectors (47), the third end position detector (47) are oppositely arranged on the third The two sides of zero point detector (46), it is opposite with the third zero point detector (46) to be moved in the third detection plate (11) Position when, so that the third positioning component (40) is in initial position, and pass through the third detection plate (11) and two the Relativeness between three ends position detector (47), make the leak detection portion (10) two third end position detectors (47) it Between distance range in move.

14. a kind of leak tester, the positioning mechanism including leak detection portion (10) and for positioning the leak detection portion (10), which is characterized in that The positioning mechanism is positioning mechanism described in any one of claims 1 to 13.