Leakage detection clamp for automobile parts

Abstract

The utility model relates to a leak detection clamp for automobile parts, which comprises a lower clamp, an upper clamp and an air inlet mechanism, an object to be detected comprises a cavity to be detected, a channel to be detected is arranged in the cavity to be detected, and the cavity to be detected is further provided with an opening communicated with the channel to be detected. The upper clamp is provided with a first blocking piece capable of blocking the outer end of the to-be-detected channel, a blocking mechanism used for blocking the inner end of the to-be-detected channel is additionally installed on the sealing seat, the blocking mechanism comprises a head end and a tail end, and when the first blocking piece blocks the outer end, the first blocking piece drives the head end to move towards the tail end at the same time. According to the technical scheme of the utility model, under the condition that the outer end of the to-be-detected channel is plugged by the first plugging member, the plugging mechanism at the inner end of the to-be-detected channel can be plugged at the same time. Therefore, the leak detection clamp can be suitable for channels which are communicated with other openings and need to be tested independently.

Description

Technical Field

[0001] The utility model relates to the technical field of detection, in particular to a leak detection fixture for automobile parts. Background Art

[0002] In the field of automobile parts production, in order to ensure that the sealing of the product meets the use standards, it is usually necessary to detect leakage in the inner cavity of the product, referred to as leak detection. Before leak detection, the channel connecting the inner cavity and the outside needs to be blocked. Common leak detection fixtures can refer to, for example, the Chinese utility model patent "Camshaft cover leak detection machine" with patent number CN202220875253.3 (publication number CN217403696U).

[0003] Conventional leak detection fixtures seal the bottom surface of the product through a sealing seat, and often only need to use a sealing piece to seal one end of the opening connected to the inner cavity of the product to form a closed independent space in the inner cavity of the product. However, if the product to be tested is, for example, Figure 1 The product 1' shown in the figure will have certain problems when using a conventional leak detection fixture: the product 1' is provided with a channel 21' and an opening 22', both of which are connected to the inner cavity 2' of the product 1'. According to the test standard of the product 1', it is necessary to conduct a sealing test on the cavity formed by the channel 21' itself, see Figure 2 The sealing seat 3' blocks the end surface of the inner cavity 2'. At this time, if only the outer end of the channel 21' is blocked by a conventional blocking member, it is not enough to make the inner cavity of the channel 21' form a closed independent space. Therefore, it is necessary to further improve the existing technology. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a leak detection fixture applicable to the channel which is connected with other openings and needs to be tested separately in view of the above-mentioned existing technical status.

[0005] The technical solution adopted by the utility model to solve the above technical problems is: the leak detection fixture for automobile parts includes:

[0006] The lower fixture is used to carry the object to be detected, wherein the object to be detected includes a cavity to be detected facing the lower fixture, a channel to be detected is provided in the cavity to be detected, and an opening communicating with the channel to be detected is also provided on the object to be detected;

[0007] An upper clamp, used for pressing the object to be detected;

[0008] An air intake mechanism, arranged on the lower fixture and / or the upper fixture, for supplying air to the cavity to be tested and the channel to be tested of the object to be tested;

[0009] Features:

[0010] The upper surface of the lower clamp is provided with a sealing seat corresponding to the cavity to be tested, and the upper clamp is provided with a first sealing member capable of sealing the outer end of the channel to be tested. The sealing seat is provided with a sealing mechanism for sealing the inner end of the channel to be tested, and the sealing mechanism includes a head end and a tail end, and an extrusion area for setting a sealing member is formed between the head end and the tail end. When the first sealing member seals the outer end of the channel to be tested, the first sealing member simultaneously contacts the head end and drives the head end to move toward the tail end, so that the extrusion area is reduced, and the sealing member is squeezed to seal the channel to be tested to form an independent enclosed space.

[0011] In order to be able to extrude the seal to block the channel to be tested, preferably, the head end includes a main body, the main body has an annular convex ring protruding radially outward, the annular convex ring constitutes an extrusion portion for extruding the seal, and the extrusion area is formed between the extrusion portion and the tail end. In the process of the extrusion portion extruding the seal, the tail end also plays a limiting role on the seal, thereby reducing the extrusion area, and the seal is squeezed to block the channel to be tested.

[0012] In order for the first blocking piece to simultaneously contact the head end and drive the head end to move toward the tail end when the first blocking piece blocks the outer end of the channel to be tested, preferably, the main body has a first end extending along the outer end, and the first end partially protrudes from the end face of the outer end. In fact, by, for example, providing a boss on the first blocking piece that can be inserted into the channel to be tested, the head end can be driven without protruding from the end face of the outer end. However, the structure designed in this way is relatively simple, and can enable both the head end and the first blocking piece to have a simple structure and matching relationship.

[0013] Further design, in order to be able to adjust the height of the head end protruding from the outer end face, preferably, a mounting portion for installing the first end is provided on the main body, and correspondingly, the first end is provided with a first matching portion adapted to the mounting portion, and an adjusting piece is provided on the mounting portion, and the adjusting piece can be moved on the mounting portion, thereby interfering with the first end portion to change the height of the first end protruding from the outer end face, and is arranged in a form in which the height of the head end protruding from the outer end face is adjustable, which is conducive to debugging the blocking mechanism, and can also be applied to other channels to be tested with the same inner diameter but different heights. Commonly used structures include, for example, the mounting portion and the first matching portion are screwed, and the adjusting piece is a bolt arranged below the first matching portion, and the height of the head end protruding from the outer end face can be adjusted by adjusting the height of the bolt.

[0014] In order to supply air to the channel to be tested for leak detection, preferably, the first end is provided with a first connecting portion for air to flow in, and correspondingly, the first blocking member is provided with a second connecting portion fluidically connected to the first connecting portion, and the second connecting portion can be connected to the air intake mechanism to supply air to the channel to be tested.

[0015] In order to enable the head end to be reset after the first blocking member is away from the channel to be measured, preferably, the main body also extends a second end toward the tail end, and the tail end is provided with a second matching portion for the second end to be inserted, and the second end can slide in the second matching portion, and an elastic member is arranged between the second end and the bottom of the second matching portion, and the elastic member makes the second end always have a tendency to move away from the second matching portion. Such a design not only provides space for the head end to move toward the tail end, but also enables the head end to be reset after the first blocking member is away from the channel to be measured.

[0016] Further design, in order to prevent the head end from being completely separated from the tail end under the action of the elastic member, preferably, the end of the second end portion is provided with an annular flange protruding radially outward, and the annular flange constitutes a limiting portion of the second end portion. Correspondingly, the second matching portion is provided with a limiting step, and the limiting portion can interfere with the limiting step to prevent the second end portion from being separated from the second matching portion. According to actual needs, the limiting portion and the second end portion can have different matching relationships. For example, in order to facilitate installation, the limiting portion can be arranged as an independent component that can be installed to the second end portion.

[0017] In order to facilitate the installation of the second end to the second matching part, preferably, the tail end includes a first part and a second part, the second matching part passes through the first part, the first part includes a connecting part connected to the second part, and correspondingly, the second part includes a third matching part adapted to the connecting part. The tail end is designed as a detachable first part and a second part to facilitate the installation of other components. Commonly used structures include, for example, the third matching part and the connecting part are connected by screwing.

[0018] In order to seal the opening so that the cavity to be tested forms an independent space of density, preferably, the upper fixture is also provided with a second sealing member for sealing the opening. If the opening is adjacent to the channel to be tested, the second sealing member and the first sealing member can be set as an integrated structure.

[0019] The "fluid communication" referred to in the present invention refers to the spatial position relationship between two parts or parts (hereinafter collectively referred to as the first part and the second part), that is, the fluid (gas, liquid or a mixture of the two) can flow from the first part along the flow path or / and be transported to the second part. The first part and the second part can be directly connected, or the first part and the second part can be indirectly connected through at least one third party. The third party can be a fluid channel such as a pipe, channel, duct, guide member, hole, groove, etc., or it can be a chamber allowing fluid to flow through, or a combination of the above.

[0020] Compared with the prior art, the utility model has the advantage that by adding a sealing mechanism to the sealing seat, and when the first sealing member seals the outer end of the channel to be tested, the sealing mechanism can simultaneously seal the inner end of the channel to be tested, so that the leak detection fixture can be suitable for this type of channel that is connected to other openings and needs to be tested separately. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the product in the background technology;

[0022] Figure 2 It is a structural schematic diagram of the product and the sealing seat in the background technology;

[0023] Figure 3 This is a schematic diagram of the structure of the object to be detected in the embodiment of the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the leak detection fixture in the embodiment of the utility model;

[0025] Figure 5 This is a schematic structural diagram of the leak detection fixture from another angle in an embodiment of the utility model;

[0026] Figure 6 This is a structural schematic diagram of the blocking mechanism in the embodiment of the utility model;

[0027] Figure 7 This is a schematic diagram of the explosion structure of the blocking mechanism in the embodiment of the utility model;

[0028] Figure 8 This is a schematic diagram of the structure of the first blocking member and the second blocking member in an embodiment of the utility model;

[0029] Fig. 9 This is a schematic diagram of the leak detection fixture in the initial state in the embodiment of the utility model;

[0030] Fig.10 This is a schematic diagram of the blocking mechanism in the initial state in the embodiment of the utility model;

[0031] Fig.11 This is a schematic diagram of the state of the leak detection fixture in the embodiment of the utility model in the working state;

[0032] Fig.12 It is a schematic diagram of the state of the blocking mechanism in the embodiment of the utility model in the blocking state. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with specific embodiments.

[0034] like Figures 3 to 8 As shown, it is a preferred embodiment of the utility model. The leak detection fixture for automobile parts in this embodiment includes a lower fixture 2 for carrying the object to be detected 1, an upper fixture 3 for pressing the object to be detected 1, and an air intake mechanism 4 arranged on the lower fixture 2 and / or the upper fixture 3, and for supplying air to the cavity to be detected 11 and the channel to be detected 12 of the object to be detected 1. Since the air intake mechanism 4 is relatively conventional, it will not be described in detail and will not be indicated in the accompanying drawings. Furthermore, the object to be detected 1 includes a cavity to be detected 11 facing the lower fixture 2, and a channel to be detected 12 is provided in the cavity to be detected 11, and an opening 13 connected to the channel to be detected 12 is also provided on the object to be detected 1. A sealing seat 21 corresponding to the cavity 11 to be tested is provided on the upper surface of the lower clamp 2, and a first sealing member 31 capable of sealing the outer end 121 of the channel 12 to be tested is provided on the upper clamp 3. A sealing mechanism 5 for sealing the inner end 122 of the channel 12 to be tested is installed on the sealing seat 21. The sealing mechanism 5 includes a head end 51 and a tail end 52, and an extrusion area 53 for setting a seal 6 is formed between the head end 51 and the tail end 52. When the first sealing member 31 seals the outer end 121 of the channel 12 to be tested, the first sealing member 31 simultaneously contacts the head end 51 and drives the head end 51 to move toward the tail end 52, so that the extrusion area 53 is reduced, and the seal 6 is squeezed to seal the channel 12 to be tested to form an independent enclosed space.

[0035] In order to squeeze the seal 6 to block the channel to be tested 12, the head end 51 includes a body 511, and the body 511 has an annular bead A protruding radially outward, and the annular bead A constitutes an extrusion portion 512 for squeezing the seal 6, and an extrusion area 53 is formed between the extrusion portion 512 and the tail end 52. In order for the first blocking member 31 to simultaneously contact the head end 51 and drive the head end 51 to move toward the tail end 52 when the first blocking member 31 blocks the outer end 121 of the channel to be tested 12, the body 511 in this embodiment extends along the outer end 121 to have a first end 513, and the first end 513 partially protrudes from the end surface of the outer end 121. Further, in order to adjust the height of the head end 51 protruding from the end surface of the outer end 121, a mounting portion 514 for mounting the first end 513 is provided on the body 511, and correspondingly, the first end 513 is provided with a first matching portion 515 adapted to the mounting portion 514, and an adjusting member 516 is provided on the mounting portion 514, and the adjusting member 516 can move on the mounting portion 514, thereby conflicting with the first end 513 to change the height of the first end 513 protruding from the end surface of the outer end 121. In this embodiment, the mounting portion 514 is a boss protruding from the body 511 and processed with threads, while the first matching portion 515 is a threaded hole, and the adjusting member 516 is a bolt provided on the mounting portion 514. In order to supply air to the channel 12 to be tested for leak detection, the first end 513 is provided with a first connecting portion 517 for air to flow in. Correspondingly, the first blocking member 31 is provided with a second connecting portion 32 fluidically connected to the first connecting portion 517, so that the channel 12 to be tested can be inflated for testing after the channel 12 to be tested is blocked.

[0036] Furthermore, considering that the head end 51 needs to be reset after the first blocking member 31 is away from the channel to be tested 12, the body 511 also extends a second end 518 toward the tail end 52, and the tail end 52 is provided with a second matching portion 521 for the second end 518 to be inserted, and the second end 518 can slide in the second matching portion 521, and an elastic member 54 is provided between the second end 518 and the bottom of the second matching portion 521, and the elastic member 54 makes the second end 518 always have a tendency to move away from the second matching portion 521. In order to prevent the head end 51 from completely separating from the tail end 52 under the action of the elastic member 54, an annular flange B is radially protruded outward at the end of the second end 518, and the annular flange B constitutes a limiting portion 519 of the second end, and the second matching portion 521 is provided with a limiting step 522, and the limiting portion 519 can conflict with the limiting step 522 to prevent the second end 518 from separating from the second matching portion 521. Considering the installation problem of each component in the second matching portion 521, the tail end 52 in this embodiment includes a first portion 423 and a second portion 524, the second matching portion 521 passes through the first portion 523, the first portion 523 includes a connecting portion 525 connected to the second portion 524, and correspondingly, the second portion 524 includes a third matching portion 526 adapted to the connecting portion 525, so the first portion 523 and the second portion 524 are two detachable components, which is conducive to the installation of other components. In this embodiment, the connecting portion 525 is a threaded hole, and the third matching portion 526 is a boss with a thread.

[0037] Considering the need to form a closed independent space for the cavity 11 to be tested, the upper fixture 3 is also provided with a second blocking member 33 for blocking the opening 13. Since the opening 13 in this embodiment is adjacent to the channel 12 to be tested, the first blocking member 31 and the second blocking member 33 in this embodiment are integrally provided to form an integral blocking member 34. In addition, in order to enhance the blocking effect of the integral blocking member 34 on the opening 13 and the channel 12 to be tested, a sealing ring 61 is also provided in the corresponding area on the integral blocking member 34.

[0038] The use process of the leak detection fixture for automobile parts provided in this embodiment is as follows:

[0039] like Fig. 9 As shown, at this time, the leak detection fixture is in the initial state, and the upper fixture 3 is away from the object to be detected 1. Fig.10 At this time, the blocking mechanism 5 is also in the initial state, and both ends of the channel 12 to be tested are not blocked; see Fig.11 As the upper fixture 3 presses the object 1 to be detected, the leak detection fixture enters the working state, and the second blocking member 33 has blocked the opening 13, see Fig.12Similarly, the first blocking member 31 has blocked the outer end 121 of the channel to be tested 12, and the first end 513 is resisted by the first blocking member 31 to move toward the tail end 52, the extrusion area 53 is reduced, and the sealing member 6 is squeezed by the extrusion portion 512 and the tail end 52, thereby blocking the inner end 122 of the channel to be tested 12, so that the channel to be tested 12 forms a closed independent space. At this time, the air intake mechanism 4 can perform leak detection on the channel to be tested 12 through the second connecting portion 32 and the first connecting portion 517.

Claims

1. A leak detection fixture for automobile parts, comprising: The lower fixture (2) is used to carry the object to be detected (1), wherein the object to be detected (1) comprises a cavity to be detected (11) facing the lower fixture (2), a channel to be detected (12) is provided in the cavity to be detected, and an opening (13) communicating with the channel to be detected (12) is also provided on the object to be detected (1); An upper clamp (3) for pressing the object to be detected (1); An air intake mechanism (4) is arranged on the lower fixture (2) and / or the upper fixture (3) and is used to supply air to the cavity (11) and the channel (12) of the object (1) to be tested; Features: The upper surface of the lower fixture (2) is provided with a sealing seat (21) corresponding to the cavity (11) to be tested, the upper fixture (3) is provided with a first blocking member (31) capable of blocking the outer end (121) of the channel (12) to be tested, and the sealing seat (21) is provided with a blocking mechanism (5) for blocking the inner end (122) of the channel (12) to be tested, the blocking mechanism (5) comprising a head end (51) and a tail end (52), the head end (51) and the tail end (52) An extrusion area (53) for arranging a sealing member (6) is formed between the first sealing member (31) and the first end (51). When the first sealing member (31) seals the outer end (121) of the channel to be measured (12), the first sealing member (31) simultaneously contacts the head end (51) and drives the head end (51) to move toward the tail end (52), so that the extrusion area (53) is reduced, and the sealing member (6) is squeezed to seal the channel to be measured (12) to form an independent closed space.

2. The leak detection fixture according to claim 1, characterized in that: The head end (51) includes a main body (511), the main body (511) has an annular bead (A) protruding radially outward, the annular bead (A) constitutes an extrusion portion (512) for extruding the seal (6), and the extrusion area (53) is formed between the extrusion portion (512) and the tail end (52).

3. The leak detection fixture according to claim 2, characterized in that: The main body (511) has a first end portion (513) extending along the outer end (121), and the first end portion (513) partially protrudes from the end surface of the outer end (121).

4. The leak detection fixture according to claim 3, characterized in that: The main body (511) is provided with a mounting portion (514) for mounting the first end portion (513); correspondingly, the first end portion (513) is provided with a first matching portion (515) adapted to the mounting portion (514); an adjusting member (516) is provided on the mounting portion (514); the adjusting member (516) is movable on the mounting portion (514) so ​​as to come into contact with the first end portion (513) to change the height of the first end portion (513) protruding from the end surface of the outer end (121).

5. The leak detection fixture according to claim 4, characterized in that: The first end portion (513) is provided with a first connecting portion (517) for air to flow in, and correspondingly, the first blocking member (31) is provided with a second connecting portion (32) in fluid communication with the first connecting portion (517), and the second connecting portion (32) can be connected to the air intake mechanism (4) to supply air to the channel to be tested (12).

6. The leak detection fixture according to claim 5, characterized in that: The main body (511) also extends a second end portion (518) toward the tail end (52); the tail end (52) is provided with a second fitting portion (521) for the second end portion (518) to be inserted; the second end portion (518) is capable of sliding in the second fitting portion (521); an elastic member (54) is provided between the second end portion (518) and the bottom of the second fitting portion (521); the elastic member (54) enables the second end portion (518) to always have a tendency to move away from the second fitting portion (521).

7. The leak detection fixture according to claim 6, characterized in that: The distal end of the second end portion (518) is provided with an annular flange (B) protruding radially outward, and the annular flange (B) constitutes a limiting portion (519) of the second end portion (518). Correspondingly, the second matching portion (521) is provided with a limiting step (522), and the limiting portion (519) can interfere with the limiting step (522) to prevent the second end portion (518) from being separated from the second matching portion (521).

8. The leak detection fixture according to claim 7, characterized in that: The tail end (52) includes a first part (523) and a second part (524), the second matching part (521) passes through the first part (523), the first part (523) includes a connecting part (525) connected to the second part (524), and correspondingly, the second part (524) includes a third matching part (526) adapted to the connecting part (525).

9. The leak detection fixture according to any one of claims 1 to 8, characterized in that: The upper clamp (3) is also provided with a second blocking member (33) for blocking the opening (13).

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