Multifunctional test fixture of air tightness detection equipment

Abstract

The invention relates to a multifunctional test fixture for air tightness detection equipment, which comprises a sealing chamber for forming a vacuum environment and two clamping assemblies arranged in the sealing chamber, the two clamping assemblies are respectively connected with two ends of a hose, and each clamping assembly comprises a clamping ring group, a driving mechanism and a pressurizing mechanism, the driving mechanism is in transmission connection with the clamping ring set, the pressurizing mechanism is arranged in the axial direction of the clamping ring set, and the pressurizing mechanism is used for sealing an orifice of the hose or pressurizing the interior of the hose; any end of the hose can extend into the clamping ring set, and the driving mechanism drives the clamping ring set to move in the direction of the pressurizing mechanism, so that the pressurizing mechanism extends into an orifice of the hose and is located in the clamping ring set; the clamping ring set can extrude the hose inwards so that the clamping ring set and the pressurizing mechanism can tightly clamp the hose. Through the design, the problem of leakage caused by non-uniform clamping force or incomplete sealing in the prior art is solved. The clamping ring set can extrude the hose inwards, and hoses of different specifications can be effectively clamped and sealed.

Description

Technical Field

[0001] The present application relates to the technical field of air tightness detection, and in particular to a multifunctional test fixture of air tightness detection equipment. Background Art

[0002] Air tightness testing equipment is widely used in the field of industrial manufacturing, especially in the quality inspection of various hoses. Hoses play an indispensable role in the automotive, aerospace, engineering machinery and other industries, such as radiator hoses, heater hoses, air filter hoses, turbocharger hoses used in automobiles, hydraulic hoses in engineering machinery and various special hoses in aviation equipment. These hoses must have good air tightness under complex environments such as pressure and temperature changes to ensure the safety and stability of the entire system. Therefore, strict air tightness testing of these hoses is an important part of ensuring their reliable performance.

[0003] Existing air tightness testing equipment has some obvious shortcomings when testing hoses. First, existing equipment can often only test hoses of a single specification and lacks versatility, which causes companies to need to replace different clamps when facing hoses of different specifications, which not only increases equipment costs but also reduces testing efficiency. In addition, when clamping hoses, the sealing effect of existing equipment is not ideal, and leakage problems caused by uneven clamping force or incomplete sealing are prone to occur, which to some extent affects the accuracy of the test results.

[0004] In order to deal with the above problems, some businesses have developed clamps that can adapt to various specifications of hoses and improve the sealing effect by improving the sealing structure. However, these improvements still have limitations. In actual applications, the existing solutions often cause leakage problems due to uneven clamping force or uneven sealing when the equipment clamps the hose. This unevenness is caused by the elasticity difference of the hose material and the uneven force during the clamping process, which ultimately leads to poor sealing effect and affects the reliability of the airtightness test.

[0005] Therefore, in order to solve the leakage problem caused by uneven clamping force or uneven sealing when the equipment clamps the hose, it is necessary to propose a multifunctional test fixture for airtightness testing equipment. The multifunctional test fixture can not only adapt to hoses of different specifications, but also has uniform clamping force and reliable sealing performance to improve the accuracy of the test results. Summary of the invention

[0006] The purpose of this application is to overcome the deficiencies in the prior art and to propose a multifunctional test fixture for air tightness testing equipment to solve the problem that the sealing effect of the prior equipment is not ideal when clamping the hose, and leakage is easily caused by uneven clamping force or incomplete sealing.

[0007] This application is implemented through the following technical solutions:

[0008] The present application proposes a multifunctional test fixture for air tightness detection equipment, comprising a sealed chamber for forming a vacuum environment and two clamping assemblies arranged in the sealed chamber, the two clamping assemblies are respectively connected to two ends of a hose, each of the clamping assemblies comprises a clamping ring group, a driving mechanism and a pressurizing mechanism, the driving mechanism is transmission-connected to the clamping ring group, the pressurizing mechanism is arranged along the axial direction of the clamping ring group, and the pressurizing mechanism is used to seal the orifice of the hose or pressurize the inside of the hose;

[0009] Either end of the hose can extend into the clamping ring assembly, and the driving mechanism drives the clamping ring assembly to move in the direction of the booster mechanism, so that the booster mechanism extends into the hose orifice and is located in the clamping ring assembly;

[0010] The clamping ring set can squeeze the hose inwards, so that the clamping ring set and the pressurizing mechanism can tightly clamp the hose.

[0011] In one embodiment of the present application, the clamping ring assembly includes an annular member and a knob cover, either end of the hose can extend into the annular member, a plurality of elastic clamping plates are provided at one end of the annular member facing the knob cover, and each of the elastic clamping plates is evenly spaced along the circumference of the annular member; the knob cover is sleeved on the annular member and is threadedly connected to the annular member;

[0012] When the knob cover rotates toward the annular member, the knob cover squeezes each of the elastic clamps simultaneously, so that each of the elastic clamps is simultaneously retracted toward the inside and clamps the hose.

[0013] In one embodiment of the present application, the knob cover is provided with a first inclined surface inside along the circumferential direction, an end of the first inclined surface close to the ring member is defined as a first inner diameter, an end of the first inclined surface away from the ring member is defined as a second inner diameter, the first inner diameter gradually decreases toward the second inner diameter, and each of the elastic clamping plates is provided with a second inclined surface matched with the first inclined surface on its outer surface along the circumferential direction;

[0014] When the knob cover is threadedly connected to the annular member, the first inclined surface and the second inclined surface form a conical fit;

[0015] When the knob cover rotates toward the annular member, the first inner diameter gradually decreases toward the second inner diameter, and pressure is gradually applied to the second inclined surface, so that each of the elastic clamps is simultaneously retracted toward the inside and uniformly clamps the hose.

[0016] In one embodiment of the present application, the knob cover is provided with an annular internal thread along the circumferential direction, and the annular internal thread is adjacent to the first inclined surface. The annular member is provided with an annular external thread on the outer surface along the circumferential direction, and the annular external thread is adjacent to the second inclined surface. The annular internal thread and the annular external thread are both provided on a side close to the boosting mechanism, and when the annular internal thread is threadedly connected with the annular external thread, the first inclined surface and the second inclined surface form a conical fit.

[0017] In one embodiment of the present application, an annular groove is provided on the circumferential outer surface of the annular member. When the annular inner thread is threadedly connected with the annular outer thread, the knob cover extends into the annular groove, and the knob cover and the annular member are fitted on the inner wall of the annular groove.

[0018] In one embodiment of the present application, the boosting mechanism includes:

[0019] A conical nozzle, one end of which is a conical first diameter, and the other end of which is a conical second diameter, the conical second diameter gradually decreases toward the conical first diameter, the conical first diameter faces the annular member, the conical nozzle and the annular member are on the same central axis, the conical nozzle can be extended into the orifice of the hose and is located in the annular member, and the conical nozzle is provided with an air inlet hole along the central axis direction;

[0020] A connecting pipe, one end of which is connected to the second diameter of the cone so that the interior of the connecting pipe is connected to the air inlet hole, and the other end is connected to the pump body, and the pump body can drive the gas to enter the hose through the connecting pipe and the cone nozzle in sequence to increase the pressure inside the hose;

[0021] An air valve is arranged on the connecting pipe, and the air valve can drive the connecting pipe to close so as to seal the orifice of the hose;

[0022] When the driving mechanism drives the clamping ring assembly to move along the direction of the conical nozzle, one end of the conical first diameter of the conical nozzle extends into the orifice of the hose and the orifice of the hose is opened by the elasticity of the hose itself.

[0023] In one embodiment of the present application, the multifunctional test fixture of the airtightness detection device further includes a fixed base, the fixed base is arranged in the sealed chamber, and the driving mechanism includes:

[0024] A fixing frame, fixedly connected to the fixing base;

[0025] A transmission mechanism is arranged on the fixing frame;

[0026] A first screw rod is rotatably connected to the fixing frame and is arranged along the axial direction of the annular member, and the transmission mechanism is transmission-connected to the first screw rod;

[0027] A second screw rod is rotatably connected to the fixing frame and is arranged along the axial direction of the annular member, and the transmission mechanism is transmission-connected to the second screw rod;

[0028] The annular member is provided with a sliding frame along the radial direction, and the sliding frame is provided with a first thread hole and a second thread hole along the axial direction of the annular member. The first thread rod is threadedly connected to the first thread hole, and the second thread rod is threadedly connected to the second thread hole. The transmission mechanism can simultaneously drive the first thread hole and the second thread hole to rotate, so as to drive the clamping ring group to move toward or away from the boosting mechanism.

[0029] In an embodiment of the present application, the sliding frame is slidably connected to the fixed frame, and the conical nozzle is fixedly connected to the fixed frame.

[0030] In one embodiment of the present application, the transmission mechanism includes:

[0031] a worm drive member, rotatably connected to the fixed frame;

[0032] a turbine rotatably connected to the fixed frame and meshing with the worm drive;

[0033] A first gear, fixedly connected to the turbine, wherein the first gear and the turbine have the same central axis;

[0034] a second gear, rotatably connected to the fixing frame, the second gear meshing with the first gear, the diameter of the second gear being larger than the diameter of the first gear, the second gear having a first connecting hole formed in the axis direction thereof, the first screw rod being connected to the first connecting hole;

[0035] The first screw rod is drivingly connected to the second screw rod;

[0036] The worm drive member drives the second gear to rotate through a transmission connection, so as to drive the first screw rod and the second screw rod to rotate synchronously;

[0037] The worm drive is meshed with the worm gear to prevent the sliding frame from moving under the action of external forces.

[0038] In one embodiment of the present application, a first rotating shaft is provided on the circumference of the first screw rod, a second rotating shaft is provided on the circumference of the second screw rod, the first rotating shaft and the second rotating shaft are arranged along the same vertical direction, and the transmission mechanism further comprises a synchronous belt, one end of the synchronous belt surrounds the first rotating shaft, and the other end surrounds the second rotating shaft;

[0039] When the first screw rod rotates, the first rotating shaft drives the synchronous belt to rotate, so as to rotate the first screw rod and the second screw rod synchronously.

[0040] Compared with the prior art, the beneficial effects of this application are:

[0041] 1. Each clamping assembly includes a clamping ring group, a driving mechanism and a boosting mechanism. The driving mechanism is connected to the clamping ring group in a transmission manner. The boosting mechanism is arranged along the axial direction of the clamping ring group. The boosting mechanism is used to seal the orifice of the hose or to increase the pressure inside the hose. By arranging the clamping ring group, the driving mechanism and the boosting mechanism, hoses of different specifications can be effectively clamped and sealed. The clamping ring group can squeeze the hose inward so that the clamping ring group and the boosting mechanism can tightly clamp the hose; and either end of the hose can extend into the clamping ring group, and the driving mechanism drives the clamping ring group to move along the direction of the boosting mechanism, so that the boosting mechanism extends into the orifice of the hose and is located in the clamping ring group, ensuring that both ends of the hose can be subjected to uniform clamping force during the entire test process, avoiding leakage problems caused by uneven clamping force, and improving the reliability of air tightness testing.

[0042] 2. Either end of the hose can be inserted into the clamping ring assembly, and the clamping ring assembly can squeeze the hose inward, and the booster mechanism can be inserted into the orifice of the hose and located inside the clamping ring assembly. The design of the clamping ring assembly and the booster mechanism can adapt to a variety of hoses of different specifications, so that the equipment can provide reliable sealing and boosting functions under different test environments. The frequency of changing equipment or clamps for hoses of different specifications is reduced, thereby improving the efficiency and economy of the equipment.

[0043] 3. The knob cover is provided with a first inclined surface along the inner part of the circumference, and each elastic clamp is provided with a second inclined surface matched with the first inclined surface along the outer surface of the circumference. The first inclined surface defines a gradually changing inner diameter from the end close to the ring member to the end away from the ring member, the end close to the ring member is the first inner diameter, the end away from the ring member is the second inner diameter, and the first inner diameter gradually decreases toward the second inner diameter. When the knob cover is installed on the ring member through a threaded connection, the first inclined surface of the knob cover forms a conical fit with the second inclined surface of the elastic clamp. When the knob cover rotates toward the direction of the ring member, since the first inner diameter gradually decreases toward the second inner diameter, the first inclined surface of the knob cover will gradually apply pressure to the second inclined surface of the elastic clamp, so that each elastic clamp is simultaneously retracted toward the inside, achieving the effect of uniformly clamping the hose. This synchronous retraction process ensures that the force of the entire clamping ring group is uniform, avoiding the problems of unstable clamping or incomplete sealing caused by uneven force distribution in traditional designs. In addition, it is also suitable for application scenarios that require air tightness testing of hoses of different diameters. Users only need to adjust the rotation angle of the knob cover to achieve precise clamping and sealing of the hose.

[0044] 4. An annular groove is provided on the outer surface of the annular member along the circumferential direction. When the knob cover is threadedly connected to the annular outer thread of the annular member through the annular inner thread, part of the structure of the knob cover will extend into the annular groove. The outer edge of the knob cover fits tightly against the inner wall of the annular groove, thereby further enhancing the connection stability between the knob cover and the annular member. The design of the annular groove plays a dual role. First, the annular groove provides a guiding and limiting function. When the knob cover rotates and is threadedly connected to the annular member, part of the knob cover extends into the annular groove, so that the knob cover can maintain higher stability during rotation and prevent tilting or unevenness during rotation. Secondly, the existence of the annular groove enables the knob cover to fit tightly against the inner wall of the annular member during rotation, forming an additional sealing area.

[0045] 5. When the driving mechanism drives the clamping ring assembly to move in the direction of the tapered nozzle, one end of the tapered first diameter of the tapered nozzle will extend into the orifice of the hose and open the orifice through the elasticity of the hose itself. When the tapered nozzle extends into the orifice of the hose, it can fully open the orifice of the hose by using the pressure brought by the diameter gradually increasing from the tapered first diameter to the tapered second diameter, thereby ensuring a uniform and tight seal between the hose and the tapered nozzle to prevent gas leakage.

[0046] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or be understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures indicated in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0048] Figure 1 A three-dimensional diagram of a multifunctional test fixture of an airtightness detection device provided in one embodiment of the present application;

[0049] Figure 2 A three-dimensional diagram of a clamping assembly and a fixed base provided in an embodiment of the present application;

[0050] Figure 3 A three-dimensional diagram of a clamping assembly and a fixed base provided in an embodiment of the present application;

[0051] Figure 4 A top view of a clamping assembly and a fixed base provided in one embodiment of the present application;

[0052] Figure 5 for Figure 4 A cross-sectional view of the PP portion;

[0053] Figure 6 for Figure 4 Cross-sectional view of the PP part (without the hose, the knob cover and the ring are not threaded together);

[0054] Figure 7 for Figure 4 Cross-sectional view of the PP part (without the hose, the knob cover and the ring are not threaded together);

[0055] Figure 8 A three-dimensional diagram of a clamping assembly and a fixed base provided in an embodiment of the present application (excluding a knob cover, a first screw rod and a second screw rod);

[0056] Fig. 9 A side view of a clamping assembly provided in one embodiment of the present application.

[0057] Description of reference numerals:

[0058] 1. Multifunctional test fixture for air tightness testing equipment; 10. Sealing chamber; 20. Clamping assembly; 211. Ring member; 2111. Elastic clamp; 2112. Second inclined surface; 2113. Annular external thread; 2114. Annular groove; 2115. Sliding frame; 2115a. First thread hole; 2115b. Second thread hole; 212. Knob cover; 2121. First inclined surface; 2121a. First inner diameter; 2121b. Second inner diameter; 2122. Annular internal thread; 221, fixed frame; 2221, worm drive; 2222, turbine; 2223, first gear; 2224, second gear; 2225, synchronous belt; 223, first screw rod; 2231, first rotating shaft; 224, second screw rod; 2241, second rotating shaft; 231, conical nozzle; 231a, conical first diameter; 231b, conical second diameter; 2311, air inlet; 232, connecting pipe; 233, air valve; 30, fixed base; 2, hose. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0060] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of this application.

[0061] It should be noted that when an element is referred to as being "fixed on" or "set on" another component, it can be directly on the other component or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component.

[0062] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0063] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0064] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0065] Please refer to Figures 1 to 9The present application proposes a multifunctional test fixture 1 of an airtightness detection device, comprising a sealed chamber 10 for forming a vacuum environment and two clamping assemblies 20 arranged in the sealed chamber 10, the two clamping assemblies 20 are respectively connected to the two ends of a hose 2, each clamping assembly 20 comprises a clamping ring group (not marked in the figure), a driving mechanism (not marked in the figure) and a pressurizing mechanism (not marked in the figure), the driving mechanism is transmission-connected with the clamping ring group, the pressurizing mechanism is arranged along the axial direction of the clamping ring group, the pressurizing mechanism is used to seal the orifice of the hose 2 or to pressurize the inside of the hose 2; either end of the hose 2 can extend into the clamping ring group, the driving mechanism drives the clamping ring group to move along the direction of the pressurizing mechanism, so that the pressurizing mechanism extends into the orifice of the hose 2 and is located in the clamping ring group; the clamping ring group can squeeze the hose 2 inward so that the clamping ring group and the pressurizing mechanism tightly clamp the hose 2.

[0066] Specifically, the multifunctional test fixture 1 of the airtightness detection equipment includes a sealed chamber 10 for forming a vacuum environment and two clamping assemblies 20 arranged in the sealed chamber 10. The two clamping assemblies 20 are respectively connected to the two ends of the hose 2 to achieve fixation and sealing of the hose 2 during the test.

[0067] Each clamping assembly 20 includes a clamping ring group, a driving mechanism and a pressurizing mechanism. The driving mechanism is connected to the clamping ring group in a transmission manner, and can achieve precise adjustment of the clamping ring group, thereby effectively clamping and sealing the hose 2. The pressurizing mechanism is arranged along the axial direction of the clamping ring group, and the pressurizing mechanism is used to seal the orifice of the hose 2 or pressurize the inside of the hose 2. The pressurizing mechanism can form an effective seal at the orifice of the hose 2. This design can not only prevent gas leakage when the inside of the hose 2 is pressurized, but also seal the orifice of the hose 2 when pressurization is not required, further enhancing the sealing effect. Specifically, either end of the hose 2 can extend into the clamping ring group. When the driving mechanism drives the clamping ring group to move along the direction of the pressurizing mechanism, the pressurizing mechanism will extend into the orifice of the hose 2 and be located in the clamping ring group. The clamping ring group can squeeze the hose 2 inward, and through close cooperation with the pressurizing mechanism, ensure that the hose 2 is uniformly clamped and sealed during the test process. This design solves the problem of leakage caused by uneven clamping force or incomplete sealing in the prior art. Through precise clamping force control and efficient sealing mechanism, the clamping ring assembly can squeeze the hose 2 inwardly, and can effectively clamp and seal hoses 2 of different specifications.

[0068] It should be understood that in actual applications, the existing solutions often cause leakage problems due to uneven clamping force or uneven sealing when the equipment clamps the hose 2. This unevenness is caused by the elasticity difference of the hose 2 material and the uneven force during the clamping process, which ultimately leads to poor sealing effect and affects the reliability of the airtightness test.

[0069] In the present application, either end of the hose 2 can be inserted into the clamping ring group, and the driving mechanism drives the clamping ring group to move in the direction of the boosting mechanism, so that the boosting mechanism extends into the orifice of the hose 2 and is located in the clamping ring group; the clamping ring group can squeeze the hose 2 inward to tightly clamp the hose 2 with the clamping ring group and the boosting mechanism. This ensures that both ends of the hose 2 can be subjected to uniform clamping force throughout the entire test process, effectively avoiding leakage problems caused by uneven clamping force. The sealing and boosting functions of the hose 2 are realized, which is suitable for a variety of test environments and has higher practicality.

[0070] Please refer to Figures 4 to 7 In one embodiment, the clamping ring assembly includes an annular member 211 and a knob cover 212, either end of the hose 2 can extend into the annular member 211, and a plurality of elastic clamps 2111 are provided at one end of the annular member 211 facing the knob cover 212, and each elastic clamp 2111 is evenly spaced along the circumference of the annular member 211; the knob cover 212 is sleeved on the annular member 211 and threadedly connected to the annular member 211; when the knob cover 212 rotates toward the direction of the annular member 211, the knob cover 212 squeezes each elastic clamp 2111 at the same time, so that each elastic clamp 2111 is simultaneously retracted inward and clamps the hose 2.

[0071] Specifically, either end of the hose 2 can extend into the annular member 211, and a plurality of elastic clamps 2111 are provided at one end of the annular member 211 facing the knob cover 212. Each elastic clamp 2111 is evenly spaced along the circumference of the annular member 211 to ensure that the hose 2 can be subjected to uniform clamping force at any position. The knob cover 212 is sleeved on the annular member 211 and is threadedly connected to the annular member 211. Such a design allows the knob cover 212 to drive the retraction and release of the elastic clamp 2111 by rotation. When the knob cover 212 rotates toward the direction of the annular member 211, the knob cover 212 will squeeze each elastic clamp 2111 at the same time, causing these elastic clamps 2111 to retract inward, thereby tightly clamping the outer wall of the hose 2.

[0072] Please refer to Figure 6 and Figure 7In one embodiment, the knob cover 212 is provided with a first inclined surface 2121 on the inner side along the circumferential direction, and each elastic clamping plate 2111 is provided with a second inclined surface 2112 matched with the first inclined surface 2121 on the outer surface along the circumferential direction, the end of the first inclined surface 2121 close to the ring member 211 is defined as a first inner diameter 2121a, and the end of the first inclined surface 2121 away from the ring member 211 is defined as a second inner diameter 2121b, and the first inner diameter 2121a gradually decreases toward the second inner diameter 2121b; when the knob cover 212 is threadedly connected to the ring member 211, the first inclined surface 2121 and the second inclined surface 2112 form a conical fit; when the knob cover 212 rotates toward the ring member 211, the first inner diameter 2121a gradually decreases toward the second inner diameter 2121b, and pressure is gradually applied to the second inclined surface 2112, so that each elastic clamping plate 2111 is simultaneously retracted toward the inside and evenly clamps the hose 2.

[0073] Specifically, the knob cover 212 is provided with a first inclined surface 2121 on the inner part along the circumferential direction, and each elastic clamping plate 2111 is provided with a second inclined surface 2112 matched with the first inclined surface 2121 on the outer surface along the circumferential direction. The first inclined surface 2121 defines a gradually changing inner diameter from an end close to the ring member 211 to an end away from the ring member 211, the end close to the ring member 211 is a first inner diameter 2121a, the end away from the ring member 211 is a second inner diameter 2121b, and the first inner diameter 2121a gradually decreases toward the second inner diameter 2121b.

[0074] When the knob cover 212 is installed on the ring member 211 through a threaded connection, the first inclined surface 2121 of the knob cover 212 forms a conical fit with the second inclined surface 2112 of the elastic clamp 2111. When the knob cover 212 rotates toward the direction of the ring member 211, since the first inner diameter 2121a gradually decreases toward the second inner diameter 2121b, the first inclined surface 2121 of the knob cover 212 will gradually apply pressure to the second inclined surface 2112 of the elastic clamp 2111, so that each elastic clamp 2111 is simultaneously retracted toward the inside, achieving the effect of uniformly clamping the hose 2. This synchronous retraction process ensures that the force of the entire clamping ring group is uniform, avoiding the problems of unstable clamping or incomplete sealing caused by uneven force distribution in traditional designs. In addition, it is also suitable for application scenarios where air tightness detection of hoses 2 of different diameters is required. The user only needs to adjust the rotation angle of the knob cover 212 to achieve accurate clamping and sealing of the hose 2.

[0075] Please refer to Figures 6 to 8In one embodiment, the knob cover 212 is provided with an annular internal thread 2122 along the circumferential direction, and the annular internal thread 2122 is adjacent to the first inclined surface 2121. The outer surface of the annular member 211 is provided with an annular external thread 2113 along the circumferential direction, and the annular external thread 2113 is adjacent to the second inclined surface 2112. The annular internal thread 2122 and the annular external thread 2113 are both arranged on a side close to the boosting mechanism. When the annular internal thread 2122 is threadedly connected with the annular external thread 2113, the first inclined surface 2121 and the second inclined surface 2112 form a conical fit.

[0076] Specifically, the annular internal thread 2122 is adjacent to the first inclined surface 2121, and the annular external thread 2113 is adjacent to the second inclined surface 2112. The annular internal thread 2122 and the annular external thread 2113 are both arranged on a side close to the boost mechanism. When the annular internal thread 2122 is threadedly connected with the annular external thread 2113, the first inclined surface 2121 and the second inclined surface 2112 form a conical fit. Through this matching structure, the first inclined surface 2121 and the second inclined surface 2112 can form a precise conical fit under the action of the threaded connection, so when the knob cover 212 rotates, the elastic clamping plate 2111 can be synchronously retracted to tightly clamp the outer wall of the hose 2, thereby achieving uniform clamping and sealing of the hose 2.

[0077] Please refer to Figure 8 In one embodiment, an annular groove 2114 is formed on the outer surface of the annular member 211 along the circumferential direction. When the annular inner thread 2122 is threadedly connected with the annular outer thread 2113, the knob cover 212 extends into the annular groove 2114, and the knob cover 212 and the annular member 211 are fitted on the inner wall of the annular groove 2114.

[0078] Specifically, an annular groove 2114 is provided on the outer surface of the ring member 211 along the circumferential direction. When the knob cover 212 is threadedly connected to the annular outer thread 2113 of the ring member 211 through the annular inner thread 2122, part of the structure of the knob cover 212 will extend into the annular groove 2114. The outer edge of the knob cover 212 is tightly fitted with the inner side wall of the annular groove 2114, thereby further enhancing the connection stability between the knob cover 212 and the ring member 211. The design of the annular groove 2114 plays a dual role. First, the annular groove 2114 provides a guiding and limiting function. When the knob cover 212 rotates and is threadedly connected to the ring member 211, the knob cover 212 partially extends into the annular groove 2114, so that the knob cover 212 can maintain higher stability during the rotation process, and prevent tilting or unevenness during the rotation process. Secondly, the existence of the annular groove 2114 enables the knob cover 212 to fit tightly with the inner side wall of the ring member 211 during the rotation process, forming an additional sealing area. This sealing area not only enhances the overall sealing effect, but also prevents the entry of outside air or impurities, thereby improving the accuracy of airtightness testing.

[0079] Please refer to Figures 4 to 7 In one embodiment, the boost mechanism includes a conical nozzle 231, a connecting pipe 232 and an air valve 233. One end of the conical nozzle 231 is a conical first diameter 231a, and the other end is a conical second diameter 231b. The conical second diameter 231b gradually decreases toward the conical first diameter 231a. The conical first diameter 231a faces the annular member 211. The conical nozzle 231 and the annular member 211 have the same central axis. The conical nozzle 231 can be inserted into the orifice of the hose 2 and is located in the annular member 211. The conical nozzle 231 is provided with an air inlet 2311 along the central axis direction; one end of the connecting pipe 232 is connected to the conical second diameter 231a. 231b is connected so that the interior of the connecting pipe 232 is connected to the air inlet 2311, and the other end is connected to the pump body (not marked in the figure). The pump body can drive the gas to enter the hose 2 through the connecting pipe 232 and the conical nozzle 231 in sequence to increase the pressure on the inside of the hose 2; the air valve 233 is arranged on the connecting pipe 232, and the air valve 233 can drive the connecting pipe 232 to close to seal the orifice of the hose 2; when the driving mechanism drives the clamping ring group to move along the direction of the conical nozzle 231, one end of the conical first diameter 231a of the conical nozzle 231 extends into the orifice of the hose 2, and the orifice of the hose 2 is opened by the elasticity of the hose 2 itself.

[0080] Specifically, one end of the conical nozzle 231 is a conical first diameter 231a, and the other end is a conical second diameter 231b, and the conical second diameter 231b gradually decreases toward the conical first diameter 231a. The conical first diameter 231a faces the annular member 211, and the conical nozzle 231 and the annular member 211 share the same central axis. The conical nozzle 231 is provided with an air inlet 2311 along the central axis, and one end of the connecting pipe 232 is connected to the conical second diameter 231b, so that the inside of the connecting pipe 232 is connected to the air inlet 2311, and the other end is connected to the pump body. The pump body enters the inside of the hose 2 through the connecting pipe 232 and the conical nozzle 231 by driving gas to realize the pressurization operation of the inside of the hose 2. The air valve 233 is arranged on the connecting pipe 232, which can control the opening and closing of the connecting pipe 232, so as to seal the orifice of the hose 2 when necessary.

[0081] When the driving mechanism drives the clamping ring assembly to move in the direction of the conical mouth 231, one end of the conical first diameter 231a of the conical mouth 231 will extend into the orifice of the hose 2, and the orifice will be stretched open by the elasticity of the hose 2 itself. When the conical mouth 231 extends into the orifice of the hose 2, the conical mouth 231 can fully stretch the orifice of the hose 2 by using the pressure brought by the diameter gradually increasing from the conical first diameter 231a to the conical second diameter 231b (when the knob cover 212 cannot continue to extend into the annular groove 2114, that is, when the knob cover 212 cannot continue to rotate toward the direction of the ring member 211, it means that the conical mouth 231 has pushed the hose 2 to the limit position, that is, the elastic clamping plate 2111 of the conical mouth 231 and the ring member 211 has tightly locked the orifice of the hose 2). Such a design ensures that a tight seal is formed between the hose 2 and the conical mouth 231 to prevent gas leakage.

[0082] The design of the air inlet 2311 and the connecting pipe 232 ensures the smooth progress of the pressurization process. The pump body supplies air to the conical nozzle 231 through the connecting pipe 232, and the gas enters the inside of the hose 2 through the air inlet 2311, thereby realizing the pressurization operation inside the hose 2. The setting of the air valve 233 provides precise control of the air flow, so that the orifice of the hose 2 can be sealed when necessary to maintain the stability and sealing of the test environment.

[0083] Please refer to Figure 1 and Figure 2 In one embodiment, the multifunctional test fixture 1 of the airtightness detection equipment further includes a fixed base 30, which is disposed in the sealed chamber 10. The driving mechanism includes a fixed frame 221, a transmission mechanism (not marked in the figure), a first screw rod 223 and a second screw rod 224. The fixed frame 221 is fixedly connected to the fixed base 30; the transmission mechanism is disposed on the fixed frame 221; the first screw rod 223 is rotatably connected to the fixed frame 221 and is disposed along the axial direction of the annular member 211, and the transmission mechanism is transmission-connected to the first screw rod 223; the second screw rod 224 is rotatably connected to the fixed frame 221. , and is arranged along the axial direction of the ring member 211, and the transmission mechanism is connected to the second screw rod 224 in transmission connection; the ring member 211 is provided with a sliding frame 2115 along the radial direction, and the sliding frame 2115 is provided with a first thread hole 2115a and a second thread hole 2115b along the axial direction of the ring member 211, the first screw rod 223 is threadedly connected to the first thread hole 2115a, and the second screw rod 224 is threadedly connected to the second thread hole 2115b, and the transmission mechanism can simultaneously drive the first thread hole 2115a and the second thread hole 2115b to rotate, so as to drive the clamping ring group to move toward or away from the direction of the boosting mechanism.

[0084] Specifically, the first screw rod 223 is threadedly connected to the first thread hole 2115a, and the second screw rod 224 is threadedly connected to the second thread hole 2115b. The transmission mechanism can simultaneously drive the first thread hole 2115a and the second thread hole 2115b to rotate, so as to drive the clamping ring assembly to move toward or away from the booster mechanism. This synchronous drive mechanism ensures the stability and accuracy of the clamping ring assembly during movement, and avoids the problem of tilting or uneven force of the sliding frame 2115 that may occur in the traditional structure.

[0085] Either end of the hose 2 is inserted into the clamping ring assembly, and the clamping ring assembly moves toward the direction of the booster mechanism, and the internal structure of the clamping ring assembly (such as the elastic clamping plate 2111) begins to act on the outer wall of the hose 2. The knob cover 212 is rotated toward the direction of the ring member 211, and each elastic clamping plate 2111 is gradually retracted to firmly fix the hose 2 around the tapered mouth 231 of the booster mechanism. At the same time, the tapered mouth 231 of the booster mechanism is gradually inserted into the orifice of the hose 2, and the orifice is opened by the elasticity of the hose 2 itself to form a seal.

[0086] The knob cover 212 is rotated away from the annular member 211, and the clamping ring assembly moves away from the booster mechanism. At this time, each elastic clamp 2111 is gradually relaxed, reducing the pressure on the outer wall of the hose 2, so that the orifice of the hose 2 is separated from the conical mouth 231 of the booster mechanism.

[0087] Please refer to Figure 2 and Figure 8 In one embodiment, the sliding frame 2115 is slidably connected to the fixed frame 221 , and the conical nozzle 231 is fixedly connected to the fixed frame 221 .

[0088] Specifically, the sliding frame 2115 is slidably connected to the fixed frame 221, so that the sliding frame 2115 can move on the fixed frame 221, and this movement is controlled by the aforementioned driving mechanism. The sliding connection is a linear guide rail to ensure that the movement of the sliding frame 2115 is stable and controlled.

[0089] The conical nozzle 231 is fixedly connected to the fixing frame 221, ensuring the fixity of the pressurization mechanism during operation. Since the conical nozzle 231 is directly involved in the pressurization and sealing operation of the hose 2, the accuracy and stability of its position are very important. By fixing the conical nozzle 231 on the fixing frame 221, it is ensured that its position will not change during the test, thereby ensuring the accuracy and reliability of the airtightness test.

[0090] Please refer to Figure 3 and Fig. 9In one embodiment, the transmission mechanism includes a worm drive 2221, a turbine 2222, a first gear 2223 and a second gear 2224. The worm drive 2221 is rotatably connected to the fixed frame 221; the turbine 2222 is rotatably connected to the fixed frame 221 and meshes with the worm drive 2221; the first gear 2223 is fixedly connected to the turbine 2222, and the first gear 2223 and the turbine 2222 are on the same central axis; the second gear 2224 is rotatably connected to the fixed frame 221, and the second gear 2224 is rotatably connected to the first gear 2223 and the second gear 2224 is meshed with the first gear 2223. 223 is engaged, the diameter of the second gear 2224 is larger than the diameter of the first gear 2223, the second gear 2224 is provided with a first connecting hole in the axial direction thereof, and the first screw rod 223 is connected to the first connecting hole; the first screw rod 223 is transmission-connected with the second screw rod 224; the worm drive 2221 drives the second gear 2224 to rotate through the transmission connection, so as to drive the first screw rod 223 and the second screw rod 224 to rotate synchronously; the worm drive 2221 and the turbine 2222 are engaged to prevent the sliding frame 2115 from moving under the action of external force.

[0091] Specifically, the worm drive 2221 is rotatably connected to the fixed frame 221 and is connected to the turbine 2222 by meshing. The turbine 2222 is fixedly connected to the first gear 2223, and the two share the same central axis. The second gear 2224 is also rotatably connected to the fixed frame 221 and meshes with the first gear 2223. The diameter of the second gear 2224 is larger than that of the first gear 2223, and is used for transmission ratio adjustment and torque increase. The first screw rod 223 is connected to the second gear 2224 through the first connecting hole in the second gear 2224, and the first screw rod 223 is connected to the second screw rod 224 through a transmission structure. The worm drive 2221 drives the turbine 2222, the first gear 2223 and the second gear 2224 to rotate, and finally drives the first screw rod 223 and the second screw rod 224 to rotate synchronously, so as to realize the precise movement of the sliding frame 2115. In short, when the worm drive 2221 drives the turbine 2222 to rotate, the turbine 2222 rotates synchronously through the first gear 2223 and the second gear 2224, thereby driving the first screw rod 223 and the second screw rod 224 to rotate, so that the sliding frame 2115 moves precisely along the set direction on the fixed frame 221.

[0092] The worm drive 2221 and the turbine 2222 are meshed to prevent the sliding frame 2115 from moving under the action of external force. The meshing between the worm and the turbine 2222 can not only transmit power, but also has a self-locking function, which means that when there is no external force, the turbine 2222 and the sliding frame 2115 connected thereto will not move by themselves. This design prevents the sliding frame 2115 from accidentally moving under the influence of external force, thereby improving the safety and stability of operation.

[0093] Please refer to Figure 4 and Figure 5In one embodiment, a first rotating shaft 2231 is provided on the circumference of the first screw rod 223, and a second rotating shaft 2241 is provided on the circumference of the second screw rod 224. The first rotating shaft 2231 and the second rotating shaft 2241 are arranged along the same vertical direction. The transmission mechanism also includes a synchronous belt 2225, one end of the synchronous belt 2225 surrounds the first rotating shaft 2231, and the other end surrounds the second rotating shaft 2241; when the first screw rod 223 rotates, the first rotating shaft 2231 drives the synchronous belt 2225 to rotate, so as to rotate the first screw rod 223 and the second screw rod 224 synchronously.

[0094] Specifically, in order to realize the synchronous rotation of the two screw rods, the transmission mechanism further includes a synchronous belt 2225. One end of the synchronous belt 2225 is wound around the first rotating shaft 2231, and the other end is wound around the second rotating shaft 2241. Through the transmission of the synchronous belt 2225, the rotational motion of the first screw rod 223 can be accurately transmitted to the second screw rod 224, so as to realize the synchronous rotation of the two. When the first screw rod 223 rotates, the first rotating shaft 2231 drives the synchronous belt 2225 to rotate, so as to rotate the first screw rod 223 and the second screw rod 224 synchronously.

[0095] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multifunctional test fixture for air tightness detection equipment, comprising a sealed chamber for forming a vacuum environment and two clamping assemblies arranged in the sealed chamber, wherein the two clamping assemblies are respectively connected to two ends of a hose, characterized in that: Each of the clamping assemblies comprises a clamping ring assembly, a driving mechanism and a pressurizing mechanism, wherein the driving mechanism is in transmission connection with the clamping ring assembly, the pressurizing mechanism is arranged along the axial direction of the clamping ring assembly, and the pressurizing mechanism is used to seal the orifice of the hose or to pressurize the interior of the hose; Either end of the hose can extend into the clamping ring assembly, and the driving mechanism drives the clamping ring assembly to move in the direction of the booster mechanism, so that the booster mechanism extends into the hose orifice and is located in the clamping ring assembly; The clamping ring set can squeeze the hose inwards, so that the clamping ring set and the pressurizing mechanism can tightly clamp the hose.

2. The multifunctional test fixture of the airtightness detection equipment according to claim 1, characterized in that: The clamping ring assembly includes an annular member and a knob cover. Either end of the hose can extend into the annular member. The end of the annular member facing the knob cover is provided with a plurality of elastic clamping plates, and each of the elastic clamping plates is evenly spaced along the circumference of the annular member. The knob cover is sleeved on the annular member and is threadedly connected to the annular member. When the knob cover rotates toward the annular member, the knob cover squeezes each of the elastic clamps simultaneously, so that each of the elastic clamps is simultaneously retracted toward the inside and clamps the hose.

3. The multifunctional test fixture of the airtightness detection equipment according to claim 2, characterized in that: The knob cover is provided with a first inclined surface inside along the circumferential direction, an end of the first inclined surface close to the annular member is defined as a first inner diameter, an end of the first inclined surface away from the annular member is defined as a second inner diameter, the first inner diameter gradually decreases toward the second inner diameter, and each of the elastic clamping plates is provided with a second inclined surface matched with the first inclined surface on the outer surface along the circumferential direction; When the knob cover is threadedly connected to the annular member, the first inclined surface and the second inclined surface form a conical fit; When the knob cover rotates toward the annular member, the first inner diameter gradually decreases toward the second inner diameter, and pressure is gradually applied to the second inclined surface, so that each of the elastic clamps is simultaneously retracted toward the inside and uniformly clamps the hose.

4. The multifunctional test fixture of the airtightness detection equipment according to claim 3, characterized in that: The knob cover is provided with an annular internal thread along the circumferential direction, and the annular internal thread is adjacent to the first inclined surface. The annular member is provided with an annular external thread on the outer surface along the circumferential direction, and the annular external thread is adjacent to the second inclined surface. The annular internal thread and the annular external thread are both provided on a side close to the boosting mechanism. When the annular internal thread is threadedly connected with the annular external thread, the first inclined surface and the second inclined surface form a conical fit.

5. The multifunctional test fixture of the airtightness detection equipment according to claim 4, characterized in that: An annular groove is formed on the outer surface of the annular member along the circumferential direction. When the annular inner thread is threadedly connected with the annular outer thread, the knob cover extends into the annular groove, and the knob cover fits with the annular member on the inner side wall of the annular groove.

6. The multifunctional test fixture of the airtightness detection equipment according to claim 3, characterized in that: The boosting mechanism comprises: A conical nozzle, one end of which is a conical first diameter, and the other end of which is a conical second diameter, the conical second diameter gradually decreases toward the conical first diameter, the conical first diameter faces the annular member, the conical nozzle and the annular member are on the same central axis, the conical nozzle can be extended into the orifice of the hose and is located in the annular member, and the conical nozzle is provided with an air inlet hole along the central axis direction; A connecting pipe, one end of which is connected to the second diameter of the cone so that the interior of the connecting pipe is connected to the air inlet hole, and the other end is connected to the pump body, and the pump body can drive the gas to enter the hose through the connecting pipe and the cone nozzle in sequence to increase the pressure inside the hose; An air valve is arranged on the connecting pipe, and the air valve can drive the connecting pipe to close so as to seal the orifice of the hose; When the driving mechanism drives the clamping ring assembly to move along the direction of the conical nozzle, one end of the conical first diameter of the conical nozzle extends into the orifice of the hose and the orifice of the hose is opened by the elasticity of the hose itself.

7. The multifunctional test fixture of the airtightness detection equipment according to claim 6, characterized in that: The multifunctional test fixture of the airtightness detection equipment further comprises a fixed base, which is arranged in the sealed chamber, and the driving mechanism comprises: A fixing frame, fixedly connected to the fixing base; A transmission mechanism is arranged on the fixing frame; A first screw rod is rotatably connected to the fixing frame and is arranged along the axial direction of the annular member, and the transmission mechanism is transmission-connected to the first screw rod; A second screw rod is rotatably connected to the fixing frame and is arranged along the axial direction of the annular member, and the transmission mechanism is transmission-connected to the second screw rod; The annular member is provided with a sliding frame along the radial direction, and the sliding frame is provided with a first thread hole and a second thread hole along the axial direction of the annular member. The first thread rod is threadedly connected to the first thread hole, and the second thread rod is threadedly connected to the second thread hole. The transmission mechanism can simultaneously drive the first thread hole and the second thread hole to rotate, so as to drive the clamping ring group to move toward or away from the boosting mechanism.

8. The multifunctional test fixture of the airtightness detection equipment according to claim 7, characterized in that: The sliding frame is slidably connected to the fixed frame, and the conical nozzle is fixedly connected to the fixed frame.

9. The multifunctional test fixture of the airtightness detection equipment according to claim 7, characterized in that: The transmission mechanism comprises: a worm drive member, rotatably connected to the fixed frame; a turbine rotatably connected to the fixed frame and meshing with the worm drive; A first gear, fixedly connected to the turbine, wherein the first gear and the turbine have the same central axis; a second gear, rotatably connected to the fixing frame, the second gear meshing with the first gear, the diameter of the second gear being larger than the diameter of the first gear, the second gear having a first connecting hole formed in the axis direction thereof, the first screw rod being connected to the first connecting hole; The first screw rod is drivingly connected to the second screw rod; The worm drive member drives the second gear to rotate through a transmission connection, so as to drive the first screw rod and the second screw rod to rotate synchronously; The worm drive is meshed with the worm gear to prevent the sliding frame from moving under the action of external forces.

10. The multifunctional test fixture of the airtightness detection equipment according to claim 9, characterized in that: A first rotating shaft is provided around the circumference of the first screw rod, and a second rotating shaft is provided around the circumference of the second screw rod, the first rotating shaft and the second rotating shaft are arranged along the same vertical direction, and the transmission mechanism further comprises a synchronous belt, one end of the synchronous belt surrounds the first rotating shaft, and the other end surrounds the second rotating shaft; When the first screw rod rotates, the first rotating shaft drives the synchronous belt to rotate, so as to rotate the first screw rod and the second screw rod synchronously.

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