Thermostat double-station airtightness test fixture

Abstract

The utility model aims at providing a kind of thermostatic head double station air tightness test fixture, it includes support seat and sealing assembly, support seat is provided with load block, at least two gas inlet holes are set on load block, gas inlet hole is used to external air source, sealing assembly includes material pressing driving part, several material pressing rods, several plugging driving parts and several plugging blocks, material pressing driving part is used to drive each material pressing rod to descend, so that each material pressing rod is pressed at least two thermostatic head on load block, so that each thermostatic head is buckled on each gas inlet hole respectively, each plugging driving part is set on support seat, each plugging block is set on the output shaft of each plugging driving part, each plugging driving part is used to drive each plugging block to approach each thermostatic head, so that each plugging block seals thermostatic head one opening respectively, at least one of each plugging block for plugging thermostatic head is provided with gas connection head, gas connection head is used to external differential pressure tester.

Description

Technical Field

[0001] This utility model relates to the technical field of airtightness testing fixtures, and in particular to a dual-station airtightness testing fixture for thermostats. Background Technology

[0002] The automotive thermostat is a key temperature control valve that controls the flow path of coolant in the engine cooling system. Its core function is to automatically adjust the circulation path and flow rate of coolant according to the engine temperature, ensuring that the engine always operates within the optimal temperature range.

[0003] As a device for regulating coolant, the airtightness of the thermostat is the most basic quality requirement. In order to prevent defective products from flowing into subsequent stages, the airtightness of the thermostat needs to be tested during the production process. Specifically, by introducing gas at a certain pressure into the thermostat and detecting the change in pressure difference within a predetermined time, the airtightness of the thermostat can be tested.

[0004] However, current airtightness testing devices can only test the airtightness of a single thermostat at a time, which is inefficient. Furthermore, since thermostats typically have multiple openings, existing airtightness testing devices often fail to reliably seal some openings during practical use, leading to inaccurate airtightness test results. Therefore, to address these issues, this application proposes a dual-station airtightness testing fixture for thermostats. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a dual-station airtightness testing fixture for thermostats that can reliably perform airtightness testing on thermostats and improve testing efficiency.

[0006] The technical solution adopted in this utility model is:

[0007] A dual-station airtightness testing fixture for thermostats includes:

[0008] A support base, on which a material carrier block is mounted, and the material carrier block has at least two air inlets for connecting to an external air source; and

[0009] A sealing assembly includes a pressure drive, several pressure rods, several sealing drive components, and several sealing blocks. The pressure drive is mounted on a support base. Each pressure rod is mounted on the output shaft of the pressure drive and is located above the material block. When the pressure drive lowers the pressure rods, it presses at least two thermostats onto the material block, causing each thermostat to be secured to its respective air inlet. Each sealing drive is mounted on the support base, and each sealing block is mounted on its output shaft. When the sealing drive brings the sealing blocks closer to the thermostats, each sealing block seals one opening of the thermostat. At least one of the sealing blocks used to seal the thermostats is equipped with an air inlet for connecting to an external differential pressure tester.

[0010] Optionally, the material block is provided with a plurality of positioning posts, which are used to position the thermostat.

[0011] Optionally, a guide portion is provided at the top of the positioning post.

[0012] Optionally, an anti-pressure ring is fitted on the outer wall of the positioning column, and the pressing drive is used to drive the pressing rod to descend so that the pressing rod simultaneously presses the thermostat and the anti-pressure ring.

[0013] Optionally, the support base includes a base plate, a top plate, and several pillars. Both ends of each pillar are connected to the base plate and the top plate, respectively, and there is a gap between each pillar. The material loading block and the sealing drive are both disposed on the base plate, and the pressing drive is disposed on the top plate.

[0014] Optionally, the pressing drive includes a pressing cylinder and a lifting plate. The pressing cylinder is disposed on the top plate, the lifting plate is disposed on the output shaft of the pressing cylinder, and each pressing rod is disposed at intervals on the lifting plate.

[0015] Optionally, the lifting plate is further provided with a guide rod, which passes through the top plate.

[0016] Optionally, a silicone pad is provided on the side of the sealing block away from the output shaft of the sealing drive, and the silicone pad is used to abut against the opening of the thermostat.

[0017] Optionally, the blocking drive includes an L-shaped support block and a blocking cylinder. The L-shaped support block is disposed on the base plate, the blocking cylinder is disposed on the L-shaped support block, and the blocking block is disposed on the output shaft of the blocking cylinder.

[0018] The beneficial effects of this utility model are:

[0019] This utility model discloses a dual-station airtightness testing fixture for thermostats, comprising a support base and a sealing assembly. A material carrier block is mounted on the support base, and the material carrier block has at least two air inlets for connecting to an external air source. The sealing assembly includes a pressing drive component, several pressing rods, several sealing drive components, and several sealing blocks. The pressing drive component is mounted on the support base, and each pressing rod is mounted on the output shaft of the pressing drive component, with each pressing rod positioned above the material carrier block. The pressing drive component drives each pressing rod... When the rods descend, each pressure rod presses at least two thermostats onto the load block, causing each thermostat to snap onto its respective air inlet. Each sealing drive is mounted on a support base, and each sealing block is mounted on the output shaft of its respective sealing drive. Each sealing drive moves its sealing blocks closer to the thermostats, sealing one opening of each thermostat. At least one of the sealing blocks is equipped with an air inlet for connecting to an external differential pressure tester. High-pressure gas is then forced into the thermostat through the air inlet by a gas source. The differential pressure tester then measures the pressure difference inside the thermostat over a certain period, accurately determining the thermostat's airtightness. Furthermore, the pressure drive can press at least two thermostats at a time, effectively improving the efficiency of thermostat airtightness testing. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a dual-station airtightness testing fixture and a thermostat according to one embodiment of the present invention.

[0021] Figure 2 for Figure 1 The diagram shows the structure of the dual-station airtightness testing fixture for thermostats.

[0022] Figure 3 This is a schematic diagram of the thermostat to be tested;

[0023] Figure 4 for Figure 1 A partial enlarged structural diagram of A.

[0024] Explanation of reference numerals in the attached figures:

[0025] 20. Thermostat; 21. Opening; 10. Thermostat dual-station airtightness test fixture; 100. Support base; 200. Sealing assembly; 300. Loading block; 310. Air inlet; 210. Pressing drive; 220. Pressing rod; 230. Sealing drive; 240. Sealing block; 250. Air inlet; 400. Positioning post; 410. Guide; 500. Anti-pressure ring; 110. Base plate; 120. Top plate; 130. Support column; 211. Pressing cylinder; 212. Lifting plate; 213. Guide rod; 260. Silicone pad; 231. L-shaped support block; 232. Sealing cylinder. Detailed Implementation

[0026] To facilitate understanding of this utility model, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model.

[0027] like Figures 1 to 3 As shown, a dual-station airtightness testing fixture 10 for a thermostat includes a support base 100 and a sealing assembly 200. A material carrier block 300 is mounted on the support base 100, and the material carrier block 300 has at least two air inlets 310 for connecting to an external air source. The sealing assembly 200 includes a pressing drive 210, several pressing rods 220, several sealing drive components 230, and several sealing blocks 240. The pressing drive 210 is mounted on the support base 100, and each pressing rod 220 is mounted on the output shaft of the pressing drive 210, with each pressing rod 220 positioned above the material carrier block 300. The pressing drive 210 is used to drive each… When the pressure rod 220 descends, it presses at least two thermostats 20 onto the load block 300, so that each thermostat 20 is fastened onto each air inlet 310. Each sealing drive 230 is mounted on the support base 100, and each sealing block 240 is mounted on the output shaft of each sealing drive 230. Each sealing drive 230 is used to drive each sealing block 240 closer to each thermostat 20, so that each sealing block 240 seals one opening 21 of the thermostat 20. At least one of the sealing blocks 240 used to seal the thermostat 20 is provided with an air inlet 250, which is used to connect to an external differential pressure tester.

[0028] It should be noted that multiple thermostats 20 can be placed on the material block 300. For ease of description, this application provides an embodiment with two thermostats 20. Specifically, two thermostats 20 are placed spaced apart on the material block 300, with each thermostat 20 locking and covering an air inlet 310. Thus, when the pressing drive 210 drives the pressing rods 220 to descend, the pressing rods 220 can press and fix the two thermostats 20. For example, six pressing rods 220 are provided, all six pressing rods 220 are fixed on the output shaft of the pressing drive 210, three of the pressing rods 220 press one thermostat 20, and the other three pressing rods 220 press the other thermostat 20. In this way, the pressing drive 210 drives the pressing rods 220 to press the thermostats 20 onto the material block 300, so that the thermostats 20 reliably lock the air inlet 310. Furthermore, the blocking drive 230 drives the blocking blocks 240 closer to the thermostat 20, so that each blocking block 240 blocks one opening 21 of the thermostat 20. Thus, by having multiple blocking drive 230s drive multiple blocking blocks 240 closer to the two thermostats 20, each blocking block 240 can seal all openings 21 of the thermostat 20. Furthermore, at least one of the multiple blocking blocks 240 used to block each thermostat 20 is connected to a differential pressure tester. The differential pressure tester is prior art, used to detect changes in pressure difference; its structure is not within the scope of this application and will not be described in detail here. In this way, high-pressure gas is blown into the thermostat 20 through the air inlet 310 by the air source, and then the pressure difference inside the thermostat 20 is detected by the differential pressure tester for a certain period of time, so that the air tightness performance of the thermostat 20 can be accurately measured. Moreover, the pressure drive component 210 can press at least two thermostats 20 at a time, thus effectively improving the air tightness performance testing efficiency of the thermostat 20.

[0029] like Figure 2 As shown, in one embodiment, a plurality of positioning posts 400 are provided on the material block 300, and the positioning posts 400 are used to position the thermostat 20.

[0030] It should be noted that, in order to ensure that the thermostat 20 can be quickly and accurately placed on the loading block 300, and to ensure that the subsequent pressing drive 210 can drive the pressing rod 220 to press the thermostat 20 tightly, several positioning posts 400 are installed on the loading block 300, with the positioning posts 400 spaced apart. For example, each thermostat 20 is positioned by three positioning posts 400. Specifically, by passing the three positioning posts 400 through the corresponding positions of the thermostat 20, the thermostat 20 can be placed on the loading block 300.

[0031] like Figure 2As shown, in one embodiment, a guide portion 410 is provided at the top of the positioning post 400. It should be noted that the top of the positioning post 400 is chamfered to form a guide portion 410 with a diameter that increases from top to bottom. In this way, the thermostat 20 is guided and positioned when placed on the positioning post 400, so that the thermostat 20 can be quickly and accurately placed at the designated position on the loading block 300.

[0032] like Figure 1 and Figure 4 As shown, in one embodiment, an anti-pressure ring 500 is sleeved on the outer wall of the positioning post 400. The pressing drive 210 is used to drive the pressing rod 220 down so that the pressing rod 220 simultaneously presses the thermostat 20 and the anti-pressure ring 500.

[0033] It should be noted that, to prevent the pressure rod 220 from damaging the thermostat 20, a pressure-resistant ring 500 is fitted onto the positioning post 400. The height of the pressure-resistant ring 500 matches the thickness of the pressed portion of the thermostat 20. Thus, when the pressure drive 210 lowers the pressure rod 220, it simultaneously presses against both the thermostat 20 and the pressure-resistant ring 500. For example, the pressure-resistant ring 500 may be made of metal. This support, provided by the pressure-resistant ring 500, enhances the structural strength of the pressed portion, thereby preventing damage to the thermostat 20.

[0034] like Figure 1 and Figure 2 As shown, in one embodiment, the support base 100 includes a base plate 110, a top plate 120 and a plurality of pillars 130. Both ends of each pillar 130 are connected to the base plate 110 and the top plate 120 respectively, and there is a gap between each pillar 130. The material loading block 300 and the sealing drive component 230 are both disposed on the base plate 110, and the pressing drive component 210 is disposed on the top plate 120.

[0035] It should be noted that the support column 130 is fixed to the base plate 110 and the top plate 120 by screws. The pressure drive component 210 is installed on the top plate 120, so that the pressure drive component 210 can drive the pressure rod 220 to descend and press the thermostat 20.

[0036] like Figure 1 As shown, in one embodiment, the pressing drive 210 includes a pressing cylinder 211 and a lifting plate 212. The pressing cylinder 211 is disposed on the top plate 120, the lifting plate 212 is disposed on the output shaft of the pressing cylinder 211, and each pressing rod 220 is disposed at intervals on the lifting plate 212.

[0037] It should be noted that each pressing rod 220 is locked onto the lifting plate 212 by screws, so that the pressing cylinder 211 can simultaneously drive each pressing rod 220 to move up and down.

[0038] like Figure 1 and Figure 2 As shown, in one embodiment, a guide rod 213 is also provided on the lifting plate 212, and the guide rod 213 passes through the top plate 120.

[0039] It should be noted that, in order to ensure the stable descent of the pressure rods 220 to press against the thermostat 20, and thus improve the lifting stability of the lifting plate 212, guide rods 213 are fixedly installed on the top side of the lifting plate 212, and linear bearings are installed on the top plate 120, with the guide rods 213 fitting through the linear bearings. This allows the lifting plate 212 to stably drive the pressure rods 220 in their lifting motion.

[0040] like Figure 1 and Figure 2 As shown, in one embodiment, a silicone pad 260 is provided on the side of the sealing block 240 away from the output shaft of the sealing drive member 230. The silicone pad 260 is used to abut against the opening 21 of the thermostat 20.

[0041] It should be noted that in order for the sealing block 240 to reliably seal the opening 21 of the thermostat 20, a silicone gasket 260 is installed on the sealing block 240 so that the silicone gasket 260 abuts against the opening 21 of the thermostat 20 to seal it.

[0042] like Figure 1 and Figure 2 As shown, in one embodiment, the blocking drive 230 includes an L-shaped support block 231 and a blocking cylinder 232. The L-shaped support block 231 is disposed on the base plate 110, the blocking cylinder 232 is disposed on the L-shaped support block 231, and the blocking block 240 is disposed on the output shaft of the blocking cylinder 232.

[0043] It should be noted that the orientation of the opening 21 of the thermostat 20 varies depending on its shape and structure. In order to ensure that the sealing block 240 reliably seals the opening 21 of the thermostat 20, an L-shaped support block 231 is provided to support the sealing cylinder 232. Thus, by adjusting the position of the L-shaped support block 231, the sealing block 240 can reliably seal the opening 21 of the thermostat 20.

[0044] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A dual-station airtightness testing fixture for thermostats, characterized in that, include: A support base is provided with a material carrying block, and the material carrying block has at least two air inlets for connecting to an external air source. and A sealing assembly includes a pressure drive, several pressure rods, several sealing drive components, and several sealing blocks. The pressure drive is mounted on a support base. Each pressure rod is mounted on the output shaft of the pressure drive and is located above the material block. When the pressure drive lowers the pressure rods, it presses at least two thermostats onto the material block, causing each thermostat to be secured to its respective air inlet. Each sealing drive is mounted on the support base, and each sealing block is mounted on its output shaft. When the sealing drive brings the sealing blocks closer to the thermostats, each sealing block seals one opening of the thermostat. At least one of the sealing blocks used to seal the thermostats is equipped with an air inlet for connecting to an external differential pressure tester.

2. The thermostat dual-station airtightness testing fixture according to claim 1, characterized in that, The material block is provided with several positioning posts, which are used to position the thermostat.

3. The thermostat dual-station airtightness testing fixture according to claim 2, characterized in that, The top of the positioning post is provided with a guide.

4. The thermostat dual-station airtightness testing fixture according to claim 3, characterized in that, An anti-pressure ring is fitted on the outer wall of the positioning column. The pressing drive is used to drive the pressing rod to descend so that the pressing rod simultaneously presses the thermostat and the anti-pressure ring.

5. The thermostat dual-station airtightness testing fixture according to claim 1, characterized in that, The support base includes a base plate, a top plate, and several pillars. Both ends of each pillar are connected to the base plate and the top plate, respectively, and there is a gap between each pillar. The material loading block and the sealing drive are both disposed on the base plate, and the pressing drive is disposed on the top plate.

6. The thermostat dual-station airtightness testing fixture according to claim 5, characterized in that, The pressing drive includes a pressing cylinder and a lifting plate. The pressing cylinder is disposed on the top plate, the lifting plate is disposed on the output shaft of the pressing cylinder, and each pressing rod is disposed at intervals on the lifting plate.

7. The thermostat dual-station airtightness testing fixture according to claim 6, characterized in that, The lifting plate is also provided with a guide rod, which passes through the top plate.

8. The thermostat dual-station airtightness testing fixture according to claim 5, characterized in that, A silicone pad is provided on the side of the sealing block away from the output shaft of the sealing drive, and the silicone pad is used to abut against the opening of the thermostat.

9. The dual-station airtightness testing fixture for thermostats according to claim 5 or 8, characterized in that, The blocking drive includes an L-shaped support block and a blocking cylinder. The L-shaped support block is disposed on the base plate, the blocking cylinder is disposed on the L-shaped support block, and the blocking block is disposed on the output shaft of the blocking cylinder.

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