Inflation assembly of air spring

Abstract

The invention discloses an inflating assembly of an air spring, which comprises a pressure retaining valve, an inflating head with an inflating inserting needle and a limiting inserting piece, and is characterized in that a valve body of the pressure retaining valve is provided with a convex limiting part; the outwards-protruding limiting part divides the valve body into an air inlet section with an air inlet channel and an air spring air chamber connecting section which is used for being installed with an air chamber connector of an air spring in a sealed mode and is provided with an air outlet channel. The inflating head comprises a positioning cylinder, the inflating contact pin is arranged in the positioning cylinder, the inflating contact pin comprises a main body part and an inserting part, and an extending space is formed between the inserting part and the positioning cylinder; the two opposite ends of the limiting inserting piece are a connecting end and a limiting inserting end respectively, the connecting end is connected with the positioning barrel through a pull rope, the limiting inserting end is provided with an inserting groove with an opening in the side portion, and the limiting inserting end is divided into two limiting arms through the inserting groove. The air inflation device has the advantages that the structure is simple, stable installation and use of the air inflation head and the pressure retaining valve of the structure can be effectively achieved, and the air inflation head is fast and convenient to disassemble and assemble.

Description

Technical Field

[0001] The invention relates to the technical field of air spring manufacturing, and in particular to an air spring inflation component. Background Art

[0002] An air spring is a spring that is filled with compressed air in a retractable closed container and uses the elasticity of air. Air springs have a light weight and small internal friction, and exhibit excellent vibration isolation and noise reduction performance in high-frequency vibration environments. At the same time, air springs can achieve ideal variable stiffness characteristics by adjusting the internal pressure: when the load increases, the gas in the closed container is compressed, the air pressure increases, and the stiffness of the spring is increased; conversely, when the load decreases, the air pressure decreases, and the spring stiffness also decreases. This variable stiffness characteristic enables air springs to maintain the stability of the natural frequency of the vehicle body when used in automobile suspensions, so that they are not affected by load changes. Therefore, air springs have been widely used as an important component of modern automobile suspension systems.

[0003] In the manufacturing process of air springs, the inflation operation is a crucial link, which has a direct impact on the working performance of the air spring and the overall quality of use when applied to automobiles. At present, the inflation components for air springs mainly include a pressure-maintaining valve and an inflation head with an inflation pin. The pressure-maintaining valve, as a component of the air spring, is fixedly installed on the inflation port of the product. The inflation head is connected to the external air supply device and inserted into the pressure-maintaining valve through the inflation pin. The valve core of the pressure-maintaining valve is opened for inflation. To ensure stable inflation operation, it is necessary to ensure that the inflation pin can be stably inserted and installed on the pressure-maintaining valve. Therefore, the inflation head must also be clamped on the pressure-maintaining valve. However, based on the existing inflation head structure, the pressure-maintaining valves for different air springs have different installation positions, and the structures and shapes of the pressure-maintaining valves used in different air springs are different, which faces problems such as inconvenient operation, unstable clamping and low replacement efficiency. Especially for air springs whose pressure-maintaining valves are located on the upper front or side of the product, due to the particularity of the location of the inflation port, traditional inflation heads are prone to slippage or displacement during the clamping process, resulting in poor inflation effects and even safety hazards. In addition, the existing inflation heads have a complex structure, cumbersome operation, and are difficult to quickly disassemble and assemble, which has a certain impact on manufacturing efficiency. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an air spring inflation assembly which has a simple structure, is stable in use, and can be quickly disassembled and assembled, and can be adapted for use with air springs where the pressure-maintaining valve is located on the upper front or side of the product.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: An air spring inflation assembly, comprising a pressure-maintaining valve and an inflation head with an inflation pin, wherein the valve body of the pressure-maintaining valve has an outer convex limiting portion, and the outer convex limiting portion divides the valve body into an air inlet section with an air inlet passage and an air spring air chamber connecting section with an air outlet passage for sealingly mounting with an air chamber interface of the air spring; The inflation head comprises a positioning cylinder, the inflation pin is arranged in the positioning cylinder, the inflation pin comprises a main body and an insertion portion, and an insertion space is formed between the insertion portion and the positioning cylinder for the air inlet section to be inserted and installed; It also includes a limiting plug-in sheet, wherein the two opposite ends of the limiting plug-in sheet are respectively a connecting end and a limiting plug-in end, wherein the connecting end is connected to the positioning cylinder through a pull rope, and the limiting plug-in end has a plug-in slot with a side opening, and the plug-in slot divides the limiting plug-in end into two limiting arms; When inflated, the air intake section extends into the positioning cylinder, the insertion portion is sealed and tightly inserted into the air intake channel, and the upper part of the empty spring air chamber connecting section is inserted into the plug-in groove, so that the limit arm is limited below the convex limit portion.

[0006] The positioning cylinder comprises a main cylinder and an extension cylinder which are sequentially arranged along the axial direction, the main body is arranged in the main cylinder, the insertion part is arranged in the extension cylinder, and the insertion space is formed between the insertion part and the extension cylinder.

[0007] The positioning cylinder has an installation inner cavity which penetrates along the axial direction, the inflation pin is arranged in the installation inner cavity, and the positioning cylinder is provided with an anti-dropping limiting mechanism for preventing the inflation pin from falling out of the positioning cylinder.

[0008] The anti-slip limit mechanism includes an anti-slip limit ring arranged on the main cylinder body and an annular anti-slip limit wall protruding inside the main cylinder body, the outer diameter of the main body is larger than the inner diameter of the anti-slip limit ring, a limiting convex portion is protruding on the main body, the outer diameter of the limiting convex portion is larger than the inner diameter of the anti-slip limit wall, the main body is arranged between the anti-slip limit ring and the anti-slip limit wall, and the insertion portion extends from the anti-slip limit wall.

[0009] The main body is extended upward to form an extension portion, and the side of the extension portion is recessed to form a recessed end surface, so that the extension portion can extend outward from the anti-dropping limit ring, and the inflation pin has an air inlet and an inflation channel that are interconnected, the inflation channel is arranged along the axial direction of the inflation pin, and the air inlet is arranged on the extension portion.

[0010] The recessed end surface is connected to the side end surface of the main body through an inclined end surface that slopes downward from the inside to the outside. A spring is installed on the outer sleeve of the main body, and the spring is arranged between the anti-slip limit ring and the limit convex part.

[0011] A pressure block with a C-shaped cross section is detachably mounted on the main cylinder body, and a mounting groove is provided on the bottom end surface of the pressure block for the anti-slip limit ring to be embedded and installed. The pressure block is mounted on the main cylinder body, and the corresponding part of the anti-slip limit ring is embedded in the mounting groove. The extension part is arranged in the pressure block, and the air inlet is exposed through the opening of the pressure block.

[0012] An observation port communicating with the installation inner cavity is arranged at a position on the side of the extension cylinder corresponding to the insertion portion.

[0013] Compared with the prior art, the advantages of the present invention are: simple structure, a pressure-maintaining valve with an outwardly convex limiting portion is installed on the upper front part or the upper side part of the air spring, after the installation is completed, it is used in conjunction with the special inflation head of the present structure, and the insertion part of the inflation pin on the inflation head is sealed and tightly inserted into the air inlet passage of the pressure-maintaining valve, the positioning cylinder is sleeved on the outside of the pressure-maintaining valve to form a positioning, and at the same time, the limiting insert is limitedly inserted under the outwardly convex limiting portion, and the pull rope is used to effectively realize the stable positioning and installation of the inflation head and the pressure-maintaining valve of the structure, so as to ensure the stable insertion of the inflation pin, and the disassembly and assembly of the inflation head is also relatively quick and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention that cooperates with each other for installation; Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention that cooperates with each other to be installed; Figure 3 It is a schematic diagram of the three-dimensional structure of the inflation head in the present invention; Figure 4 It is a schematic cross-sectional structure diagram of the inflation head in the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the pressure-maintaining valve in the present invention; Figure 6 It is a schematic cross-sectional structure diagram of the inflatable pin in the present invention; Figure 7 This is a schematic diagram of the structure of the present invention used in conjunction with an air spring.

[0015] In the figure: 1, pressure-maintaining valve; 2, inflation pin; 201, main body; 202, insertion part; 3, inflation head; 10, outer convex limiter; 11, air inlet channel; 12, air outlet channel; 101, air inlet section; 102, air spring chamber connecting section; 4, limiter insert; 41, connecting end; 42, limiter plug end; 5, pull rope; 421, plug-in slot; 422, limiter arm; 301, main cylinder; 302, extension cylinder; 20, extending into space; 31, installation inner cavity; 32, anti-slip limit ring; 33, anti-slip limit wall; 2011, limit convex part; 2012, extension part; 2013, recessed end face; 2014, inclined end face; 7, spring; 8, pressure block; 81, installation groove; 3021, observation port; 21, air inlet; 22, inflation channel; 6, air supply connector; A, air spring. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below with reference to the accompanying drawings.

[0017] like Figures 1 to 7 As shown, an air spring inflation assembly comprises a pressure-maintaining valve 1 and an inflation head 3 with an inflation pin 2. The valve body of the pressure-maintaining valve 1 has an outer convex limiting portion 10. The outer convex limiting portion 10 divides the valve body into an air inlet section 101 with an air inlet passage 11 and an air spring air chamber connecting section 102 with an air outlet passage 12 for sealing and mounting with the air chamber interface of the air spring A. The inflation head 3 includes a positioning cylinder, and the inflation pin 2 is arranged in the positioning cylinder. The inflation pin 2 includes a main body 201 and an insertion portion 202. An insertion space 20 is formed between the insertion portion 202 and the positioning cylinder for the air inlet section 101 to be inserted and installed. It also includes a limiting plug 4, the two opposite ends of the limiting plug 4 are respectively a connecting end 41 and a limiting plug-in end 42, the connecting end 41 is connected to the positioning cylinder through a pull rope 5, the limiting plug-in end 42 has a plug-in groove 421 with a side opening, and the plug-in groove 421 divides the limiting plug-in end 42 into two limiting arms 422.

[0018] In this specific embodiment, the positioning cylinder includes a main cylinder 301 and an extension cylinder 302 which are sequentially arranged along the axial direction, the main body 201 is arranged in the main cylinder 301, the insertion part 202 is arranged in the extension cylinder 302, and an insertion space 20 is formed between the insertion part 202 and the extension cylinder 302. The positioning cylinder is composed of the main cylinder 301 and the extension cylinder 302, wherein the main cylinder 301 is responsible for the installation of the inflation pin 2, and the extension cylinder 302 is responsible for the sleeve positioning installation between the entire positioning cylinder and the pressure-maintaining valve 1. With the appropriate length of the pull rope 5, when dismantling, the limit locking of the limit plug 4 on the pressure-maintaining valve 1 must be released first, and then the positioning cylinder is pulled out, thereby achieving installation stability.

[0019] In this specific embodiment, the positioning cylinder has an installation inner cavity 31 that penetrates along the axial direction, and the inflation pin 2 is arranged in the installation inner cavity 31. In order to achieve a stable installation connection between the inflation pin 2 and the positioning cylinder, an anti-detachment limit mechanism is provided on the positioning cylinder to prevent the inflation pin 2 from detaching from the positioning cylinder.

[0020] In this specific embodiment, the anti-slip limit mechanism includes an anti-slip limit ring 32 arranged on the main cylinder 301 and an annular anti-slip limit wall 33 protruding from the main cylinder 301, the outer diameter of the main body 201 is larger than the inner diameter of the anti-slip limit ring 32, a limit convex portion 2011 is protruding from the main body 201, the outer diameter of the limit convex portion 2011 is larger than the inner diameter of the anti-slip limit wall 33, the main body 201 is arranged between the anti-slip limit ring 32 and the anti-slip limit wall 33, and the insertion portion 202 extends from the anti-slip limit wall 33. The above anti-slip limit mechanism has a simple structure and can provide a stable anti-slip limit function.

[0021] In this specific embodiment, the main body 201 is extended upward to form an extension part 2012, and the side of the extension part 2012 is recessed to form a recessed end face 2013, so that the extension part 2012 can extend outward from the anti-drop limit ring 32, and the inflation pin 2 has an air inlet 21 and an inflation channel 22 that are interconnected, and the inflation channel 22 is arranged along the axial direction of the inflation pin 2, and the air inlet 21 is arranged on the extension part 2012. The extension part 2012 is used for the arrangement of the air inlet 21, which facilitates the connection port of the air inlet 21 to be exposed to the outside for connecting the air supply connector 6 of the external air supply device.

[0022] In this specific embodiment, the concave end surface 2013 is connected to the side end surface of the main body 201 through an inclined end surface 2014 that is inclined downward from the inside to the outside, and a spring 7 is sleeved and installed on the outside of the main body 201, and the spring 7 is arranged between the anti-drop limit ring 32 and the limit convex part 2011. The above design enables the inflation pin 2 to perform elastic movement along the axial direction according to the actual insertion situation, so as to better cooperate with the corresponding pressure-maintaining valve 1 for plug-in installation and flexible use.

[0023] In this specific embodiment, a pressure block 8 with a C-shaped cross section is detachably mounted on the main cylinder 301, and a mounting groove 81 is provided on the bottom end surface of the pressure block 8 for embedding and mounting the anti-slip limit ring 32. The pressure block 8 is mounted on the main cylinder 301, and the corresponding part of the anti-slip limit ring 32 is embedded and arranged in the mounting groove 81. The extension part 2012 is arranged in the pressure block 8, and the air inlet 21 is exposed through the opening of the pressure block 8. The pressure block 8 is used to realize the stable installation of the anti-slip limit ring 32 on the main cylinder 301. At the same time, the cross section of the pressure block 8 is C-shaped and has an opening, which can realize the exposure of the connection port of the air inlet 21, and facilitate the installation and removal of the air supply connector 6 on the external air supply device.

[0024] In this specific embodiment, an observation port 3021 communicating with the installation inner cavity 31 is provided at the side of the extension cylinder 302 corresponding to the insertion portion 202. The observation port 3021 facilitates observation of the insertion position between the insertion portion 202 of the inflation needle 2 and the pressure-maintaining valve 1, ensuring that the two can be stably sealed and inserted.

[0025] In this specific embodiment, the pressure-maintaining valve 1 can be a spring-type pressure-maintaining valve or a direct-acting pressure-maintaining valve whose valve core is pushed open by air pressure to achieve communication between the air inlet channel 11 and the air outlet channel 12 .

[0026] In this specific embodiment, a pull rope 5 of appropriate length can be selected according to the specific size design. The pull rope 5 is used to prevent the loss of the limiting plug 4 and to ensure that the inflation needle 2 cannot be removed from the pressure-maintaining valve 1 when the limiting plug 4 is not removed, thereby ensuring the stability of the installation.

[0027] The specific operating principle is: the positioning cylinder is sleeved on the pressure-maintaining valve 1, so that the insertion part 202 of the inflation pin 2 is sealed and tightly inserted into the air inlet channel 11 of the pressure-maintaining valve 1. After confirming that the inflation pin 2 is inserted in place, the limiting plug 4 is inserted, so that the upper part of the empty spring air chamber connecting section 102 is inserted into the plug-in groove 421, and the limiting arm 422 is limitedly set below the convex limiting part 10 to achieve the coordinated installation of the two. After air supply, the valve core of the pressure-maintaining valve 1 is pushed open by air pressure, and the air inlet channel 11 of the pressure-maintaining valve 1 is connected with the air outlet channel 12 to realize the inflation of the air spring A; after the inflation is completed, the limiting plug 4 needs to be pulled out first to release the limiting plug 4 on the convex limiting part 10, and then the positioning cylinder can be pulled out. The valve core of the pressure-maintaining valve 1 has no external pressure, automatically resets, and is in a closed state, so that the air inlet channel 11 and the air outlet channel 12 of the pressure-maintaining valve 1 are not connected to each other.

Claims

1. An air spring inflation assembly, comprising a pressure-maintaining valve and an inflation head with an inflation pin, characterized in that: The valve body of the pressure-maintaining valve has an outer convex limiting portion, which divides the valve body into an air intake section with an air intake passage and an air spring air chamber connecting section with an air outlet passage for sealingly mounting with the air chamber interface of the air spring; The inflation head comprises a positioning cylinder, the inflation pin is arranged in the positioning cylinder, the inflation pin comprises a main body and an insertion portion, and an insertion space is formed between the insertion portion and the positioning cylinder for the air inlet section to be inserted and installed; It also includes a limiting plug-in sheet, wherein the two opposite ends of the limiting plug-in sheet are respectively a connecting end and a limiting plug-in end, wherein the connecting end is connected to the positioning cylinder through a pull rope, and the limiting plug-in end has a plug-in slot with a side opening, and the plug-in slot divides the limiting plug-in end into two limiting arms; When inflated, the air intake section extends into the positioning cylinder, the insertion portion is sealed and tightly inserted into the air intake channel, and the upper part of the empty spring air chamber connecting section is inserted into the plug-in groove, so that the limit arm is limited below the convex limit portion.

2. An air spring inflation assembly as claimed in claim 1, characterized in that The positioning cylinder comprises a main cylinder and an extension cylinder which are sequentially arranged along the axial direction, the main body is arranged in the main cylinder, the insertion part is arranged in the extension cylinder, and the insertion space is formed between the insertion part and the extension cylinder.

3. An air spring inflation assembly as claimed in claim 2, characterized in that The positioning cylinder has an installation inner cavity which penetrates along the axial direction, the inflation pin is arranged in the installation inner cavity, and the positioning cylinder is provided with an anti-dropping limiting mechanism for preventing the inflation pin from falling out of the positioning cylinder.

4. An air spring inflation assembly as claimed in claim 3, characterized in that The anti-slip limit mechanism includes an anti-slip limit ring arranged on the main cylinder body and an annular anti-slip limit wall protruding inside the main cylinder body, the outer diameter of the main body is larger than the inner diameter of the anti-slip limit ring, a limiting convex portion is protruding on the main body, the outer diameter of the limiting convex portion is larger than the inner diameter of the anti-slip limit wall, the main body is arranged between the anti-slip limit ring and the anti-slip limit wall, and the insertion portion extends from the anti-slip limit wall.

5. An air spring inflation assembly as claimed in claim 4, characterized in that The main body is extended upward to form an extension portion, and the side of the extension portion is recessed to form a recessed end surface, so that the extension portion can extend outward from the anti-dropping limit ring, and the inflation pin has an air inlet and an inflation channel that are interconnected, the inflation channel is arranged along the axial direction of the inflation pin, and the air inlet is arranged on the extension portion.

6. An air spring inflation assembly as claimed in claim 5, characterized in that The recessed end surface is connected to the side end surface of the main body through an inclined end surface that slopes downward from the inside to the outside. A spring is installed on the outer sleeve of the main body, and the spring is arranged between the anti-slip limit ring and the limit convex part.

7. An air spring inflation assembly as claimed in claim 5, characterized in that A pressure block with a C-shaped cross section is detachably mounted on the main cylinder body, and a mounting groove is provided on the bottom end surface of the pressure block for the anti-slip limit ring to be embedded and installed. The pressure block is mounted on the main cylinder body, and the corresponding part of the anti-slip limit ring is embedded in the mounting groove. The extension part is arranged in the pressure block, and the air inlet is exposed through the opening of the pressure block.

8. An air spring inflation assembly as claimed in claim 4, characterized in that An observation port communicating with the installation inner cavity is arranged at a position on the side of the extension cylinder corresponding to the insertion portion.

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