KR20230146900A - Replacable-filter body type air dryer cartridge - Google Patents

Abstract

The present invention relates to an air dryer cartridge for commercial vehicles, which includes a pressure adjustment unit that can adjust the force applied to the filter body by a spring member and a lifting element so that only the filter body inside the cartridge can be selectively replaced. It's about.

Description

Filter Body Replaceable Air Dryer Cartridge {REPLACABLE-FILTER BODY TYPE AIR DRYER CARTRIDGE}

The present invention relates to an air dryer cartridge applied to a compressed air processing system, and more specifically, to an air dryer cartridge applied to a compressed air processing system for supplying compressed air to a commercial vehicle.

This invention was made with the support of the Automotive Convergence Technology Institute's development of technology to strengthen automobile parts competitiveness (research project name), "Research project name: Development of technology for local production of high-performance electronic air dryer filters for large commercial vehicles (project number: 000021-3742)."

In commercial vehicles, various operating systems using pneumatics are provided to control the operation of large and heavy commercial vehicles. Examples of such pneumatic systems include service brake systems, pneumatic suspension systems, parking brake systems, etc. High-pressure compressed air is required to drive these pneumatic systems, and this compressed air is generated through a compressor driven by an engine or drive motor and then delivered to reservoirs in the system that consume each compressed air.

Meanwhile, the compressed air supplied through the compressor contains foreign substances including oil and moisture. Foreign substances such as oil and moisture in the compressed air can have a negative effect on the system, such as causing malfunction of the pneumatic system or reducing durability. do.

Therefore, in a system that generates and supplies compressed air, a dryer unit including a filter cartridge is provided to filter foreign substances such as oil from the generated compressed air and absorb moisture to create dry air.

Figure 1 shows an example of a compressed air treatment system equipped with a conventional dryer unit.

As shown in FIG. 1, oil and moisture are removed from the high-pressure compressed air generated in the compressor 10 as it passes through the dryer unit 20. In particular, compressed air flowing into the dryer unit 20 is processed while passing through the filter cartridge 21, and the treated compressed air is supplied to each consumer circuit through the valve assembly 22.

Meanwhile, when the dehumidifier in the dryer unit does not provide sufficient dehumidifying performance, such as reaching a saturated state, a regeneration process may be performed to restore the performance of the dehumidifier by returning dry compressed air to the dryer unit, and in this case, the compressed air flow It generally shows a flow in the opposite direction compared to when supplying silver.

For example, Korean Patent Publication No. 10-2018-0118715 (Patent Document 1) and Korean Patent No. 10-2248424 (Patent Document 2) disclose an air dryer cartridge for a compressed air treatment system.

The air dryer cartridges disclosed in Patent Documents 1 and 2 above are fixed by directly fastening the dryer cartridge itself to the valve unit. Meanwhile, if the performance of the internal dehumidifier, oil absorbent paper, etc. deteriorates, the air dryer cartridge needs to be replaced. However, the existing air dryer cartridge had operational difficulties in that the air treatment unit had to be removed from the vehicle and then the dryer cartridge had to be replaced from the air treatment unit.

Korean Patent Publication No. 10-2018-0118715 (2018. 10. 31.) Korean Patent No. 10-2248424 (2021. 04. 29.)

The purpose of the present invention is to provide an air dryer cartridge in which only the parts related to dehumidification and filtering performance that are consumable and require replacement among the components of the air dryer cartridge can be selectively replaced.

In particular, another object of the present invention is to provide an air dryer cartridge configured to modularize consumables that need to be replaced in the air dryer cartridge and to easily replace them.

Through this, the purpose of the present invention is to construct an air dryer cartridge so that other parts of the air dryer cartridge components except the internal filter body can be reused, and the vehicle owner can easily replace only the filter body parts without using special tools. There is.

In order to achieve the above object, a preferred embodiment of the present invention provides an air dryer cartridge for a compressed air processing system of a commercial vehicle, comprising: a housing having an open end at the bottom; a filter body stored inside the housing; a base portion assembled to the open end of the housing to secure the filter body inside the housing; And a pressure adjustment unit installed on the upper part of the housing and capable of adjusting the force applied to the filter body.

The pressure adjustment unit, a spring member capable of applying a spring force to the filter body; It provides an air dryer cartridge including; a lift element capable of releasing the spring force applied to the filter body by compressing the spring member to the upper surface of the housing.

The pressure adjustment unit is installed on the upper surface of the housing and further includes an adapter having a groove of a nut structure formed therein, and the lifting element operates integrally with a bolt portion inserted into the nut groove of the adapter and the bolt portion, It may include a lifting operation unit configured to compress the spring member.

The pressure adjustment unit is configured to rotate the bolt unit in the compression release direction so that the spring member is compressed and the lifting operation unit rises to release the contact between the filter body and the spring member, and the bolt unit is configured to release the contact between the filter body and the spring member. As the lifting operation part is rotated again in the direction opposite to the direction of decompression, the lifting operation part may be configured to seat the spring member on the filter body.

The lifting operation unit may include a first gear unit having a gear structure, and the filter body may include a spring seating unit formed with a second gear unit having a gear structure engaged with the first gear unit.

When the first gear part of the lifting operation unit and the second gear part of the filter body are engaged, the spring member may be configured to press the upper surface of the spring seating part.

When the lifting operation unit rises to a preset height, the meshing state between the first gear unit and the second gear unit may be released, and the spring member and the spring seating unit may be spaced apart from each other.

The first gear unit may have an external gear structure, and the second gear unit may have an internal gear structure.

The first gear unit is made of a spur gear having a plurality of gear teeth, each gear tooth of the first gear unit has a first inclined surface formed from the lower surface, and each gear tooth of the second gear unit corresponds to the first inclined surface. A second inclined surface may be formed.

The lifting element may further include a stopper portion that can contact the bottom of the adapter to limit the rising height of the lifting element.

In addition, according to a preferred embodiment of the present invention, there is a pressure adjustment unit for replacing the filter body of an air dryer cartridge for a compressed air processing system of a commercial vehicle, which is installed on the upper part of the housing and is configured to adjust the force applied to the filter body, a spring member capable of applying a spring force to the filter body; A lift element capable of releasing the spring force applied to the filter body by compressing the spring member to the upper surface of the housing. It provides a pressure adjustment unit for replacing a filter body including a lift element.

According to the present invention, among the main parts of the air dryer cartridge, only the filter body including the oil absorbent paper and dehumidifier, which are directly related to actual performance, can be selectively replaced, so there is an advantage of reusing existing parts such as the housing. there is.

In addition, according to the present invention, when replacing the filter body, the spring force applied to the filter body is released by rotating the upper bolt, and then only the internal filter body can be easily replaced, thereby simplifying the replacement work and allowing the user to easily replace the filter body. It has the advantage of being self-replaceable.

In addition, the filter body can be replaced after removing only the air dryer cartridge without removing the large and heavy compressed air treatment device itself from the vehicle, which has the advantage of simplifying the replacement work.

Figure 1 shows an example of a compressed air treatment system equipped with a conventional dryer unit.
Figure 2 is a cross-sectional view showing the main configuration of a cartridge for an air dryer according to a preferred embodiment of the present invention.
Figure 3 is an exploded perspective view of the main components of a pressure adjustment unit for replacing a filter body in a cartridge for an air dryer according to a preferred embodiment of the present invention.
Figure 4 is a cross-sectional view of a cartridge for an air dryer according to a preferred embodiment of the present invention, and is a view to explain that the base portion and the housing are separated for replacement of the filter body.
Figure 5 shows the release operation process by the pressure adjustment unit, Figure 5(a) shows the state before the release operation of the pressure adjustment unit, and Figure 5(b) shows the state after the release operation of the pressure adjustment unit. It is shown.
Figure 6 shows the gear engagement state of the lifting operation part and the filter body during the release operation by the pressure adjustment unit. Figure 6(a) shows the pressure adjustment unit before the release operation being positioned and engaged with the seating portion on the upper part of the filter body. Figure 6(b) shows a state in which the engagement between the pressure adjustment unit and the upper gear of the filter body is released after the release operation.
Figure 7 shows another embodiment of the present invention, Figure 7(a) shows a cross-section AA' before the release operation as in Figure 6(a) in an example of a pressure adjustment unit including a gear structure with inclined surfaces. 7(b) shows the AA' cross section after the release operation as shown in FIG. 6(b).
Figure 8 shows the locking operation process by the pressure adjustment unit, Figure 8(a) shows the state in which the pressure adjustment unit is not fastened to the gear plate after replacing the filter body, and Figure 8(b) shows the pressure adjustment unit. This shows the state in which filter body replacement has been completed by locking the unit.

The embodiments described below are merely intended to provide a detailed description so that a person skilled in the art can easily implement the invention, and this does not mean that the scope of protection of the present invention is limited. No. Accordingly, substitutions or changes to some components may be made without departing from the essential scope of the present invention.

In the following description, when a part is said to be 'connected' to another part, this includes not only the case where it is directly connected, but also the case where it is connected with another element or device in between. Additionally, when a part is said to 'include' a certain component, this does not mean that other components are excluded, but that it can further include other components, unless specifically stated to the contrary.

The air dryer cartridge described in this specification, like a conventional dryer cartridge, is configured to remove oil in compressed air, dry the compressed air, and supply it in one direction, while supplying compressed air for cartridge regeneration under certain conditions. This means that it is configured to carry out the process of flowing in the opposite direction and then discharging into the atmosphere. In particular, the air dryer cartridge in this specification refers to an assembly with built-in filters configured to remove foreign substances and moisture contained in compressed air, and refers to a device configured to allow the inflow and outflow of compressed air into the filters. In addition, in this specification, the filter body refers to a part that includes filters for dehumidification and/or removal of foreign substances, and this filter body refers to a part that is replaceably installed in the housing of the air dryer cartridge. Therefore, in this specification, the filter body is one of the parts constituting the air dryer cartridge, and may refer to a general term for filter assembly parts that are replaceable after removal.

The air dryer cartridge according to the present invention is configured to include an inlet port through which compressed air flows in and an outlet port through which compressed air is discharged. The terms 'inlet' and 'outlet' used herein depend on the operating state of the compressed air treatment system. It is a concept that is relatively determined, and is related to the direction of flow of compressed air. However, for convenience of explanation, in this specification, 'inflow' and 'outflow' are defined based on the state in which compressed air is supplied, that is, the state in which the air generated from the compressor flows into the air dryer cartridge and then flows out to the valve assembly. Explain. For reference, since the air flows in the opposite direction inside the cartridge during regeneration, the 'inflow' and 'outflow' are opposite to those when supplying compressed air. Those skilled in the art will understand that If so, you will fully understand.

Additionally, in this specification, compressed air being 'processed' means that oil, moisture, and foreign substances in the compressed air are filtered out as the compressed air passes through the filter cartridge.

Hereinafter, a filter body replaceable air dryer cartridge according to a preferred embodiment of the present invention will be described with reference to the attached drawings.

Figure 2 is a cross-sectional view showing the main components of an air dryer cartridge according to a preferred embodiment of the present invention, and Figure 3 is a main configuration for replacing the filter body, showing main components related to the pressure adjustment unit of the air dryer cartridge. This is an exploded perspective view.

The air dryer cartridge 1 according to a preferred embodiment of the present invention is formed to be substantially rotationally symmetrical with respect to a vertical central axis, and has a filter body 120 filled with a desiccant housed inside a generally cylindrical housing 110. It has a shape. As shown in FIG. 2, the cylindrical housing 110 may be structured to have an open end and a closed other end so that the filter body 120 can be accommodated in an internal space. For example, the housing 110 may have a cup shape manufactured by deep drawing a thin metal plate.

However, in the present invention, a pressure adjustment unit 200 including a spring member is installed at the closed other end to adjust the pressure applied to the filter when removing the filter body 120, and for this purpose, a pressure adjustment unit 200 is installed at the closed other end. A boss portion with a hole may be installed to install the pressure adjustment unit 200, and a sealing member may be added to maintain airtightness in the boss portion.

According to a preferred embodiment of the present invention, a filter body 120 filled with a desiccant is located inside the housing 110. The desiccant filled in the filter body 120 may be a powder desiccant with a dehumidifying function, such as zeolite, or may be a structure impregnated with a desiccant. This desiccant fills the internal space of the filter body 120, and as the filter body 120 is pressurized by the spring member at the top, the density of the desiccant can be sufficiently increased.

As shown in FIG. 2, the air dryer cartridge according to a preferred embodiment of the present invention has a top-down structure in which a spring member is located at the top of the housing 110 to press the filter body 120 downward.

According to one embodiment of the present invention, the filter body 120 may be the entire container storing the desiccant. For example, the filter body 120 includes a generally cylindrical filter body container portion 121 and a filter body container portion ( It may include a filter body cover 122 that covers the opening of 121). The filter body cover 122 functions as a lid to prevent the desiccant from being discharged to the outside, and there is an outlet in the center that functions as an outlet port 172 so that the compressed air that has passed through the desiccant inside the filter body 120 can be discharged. can be formed.

Meanwhile, a pre-filter 140 may be installed inside the air dryer cartridge to primarily filter foreign substances such as oil. The pre-filter in the present invention may be a filter member installed upstream of the filter body 120 in which the desiccant is stored, that is, at a position before the compressed air passes through the desiccant (based on the step of supplying (processing) the compressed air).

This pre-filter 140 is used to adsorb and remove oil contained in compressed air, and may be, for example, an oil absorbent paper made of porous material, non-woven material, etc. However, this pre-filter 140 is not limited to the one exemplified above, and may be used without limitation as long as it can pre-filter the compressed air before it flows into the desiccant during the compressed air treatment process.

The filter body container portion 121 of the filter body 120 may have a cylindrical structure concentric with the cylindrical housing 110, and thus may form a gap 160 between the filter body 120 and the cylindrical housing 110.

The gap 160 between the housing and the filter body 120 is a passage through which compressed air flowing into the cartridge moves. Therefore, when processing compressed air, the compressed air introduced into the cartridge passes through this gap 160 and moves to the desiccant side in the filter body container portion. On the other hand, when regenerating compressed air, the compressed air introduced into the cartridge may pass through the desiccant and be discharged to the outside through the gap 160.

Additionally, due to the gap 160, the filter body 120 may be separated from the housing while moving in the axial direction toward the open surface of the housing in a state in which the base portion is removed.

Meanwhile, according to one embodiment of the present invention, the pre-filter may be composed of an oil absorbent paper attached and fixed by a wrapping method, and a pre-filter holder 150 may be installed to effectively prevent the oil absorbent paper from being separated. You can.

In this example, a filter mounting portion 123 may be formed in the filter body container portion so that the pre-filter 140 can be installed, and this filter mounting portion 123 is wrapped around the oil adsorbent constituting the pre-filter 140. It may be formed on the small diameter portion of the filter body container portion that is formed to facilitate operation. The filter body container stores the desiccant inside, and it is desirable to maximize the storage volume of the desiccant in the filter body container in order to maximize the dehumidifying effect by the desiccant. To this end, the filter body container may be structured to include a large diameter portion having an outer diameter sufficiently close to the housing and a small diameter portion for seating the pre-filter 140.

A plurality of inlet holes may be formed in the small diameter portion to allow compressed air to flow into the desiccant side, and the filter mounting portion 123 may be formed on the small diameter portion to support the pre-filter 140. In this way, the filter mounting portion 123 may include a seating portion so that the filter can be seated and supported on the filter body container portion. Additionally, the filter mounting unit 123 guides the wrapping of the pre-filter and may include a pair of upper and lower guide units to limit the vertical movement of the pre-filter 140. Therefore, the filter mounting portion 123 in the filter cartridge according to a preferred embodiment of the present invention may be a seating surface formed along the circumference of the small diameter portion to enable the filter to be seated, and a pair of annular guide portions extending outward from the seating surface. there is.

Accordingly, the pre-filter 140 can be supported by the seating portion of the filter mounting portion, and especially in the compressed air treatment step, the pre-filter 140 is prevented from retreating by compressed air flowing in from the housing inner gap 160. can do.

In addition, a pre-filter holder 150 may be installed between the outer surface of the pre-filter 140 installed on the filter mounting unit 123 and the housing, and as shown in FIG. 2, this pre-filter holder 150 is oriented in the outer circumferential direction. The outer end may be in close contact with the inner surface of the housing, while the inner end may be in close contact with the outer peripheral surface of the pre-filter 140. Accordingly, the pre-filter can be supported toward the outside of the housing in the radial direction by the pre-filter holder 150. This pre-filter holder includes an arcuate support portion oriented in the outer circumferential direction toward the housing, and can support the pre-filter holder while contacting the housing by this arcuate support portion.

As previously defined, the term 'filter body' in this specification may be defined to mean a part that includes filters for dehumidification and/or removal of foreign substances and is replaceably installed in the housing. In particular, the term 'filter body' in this specification may, in a narrow sense, mean a filter body containing a dehumidifying agent in the example of FIG. 2, and in a broad sense, a filtering/dehumidifying device that can be removed as a whole with a pre-filter installed. It may mean the entire part.

Therefore, the filter body in the present invention can be defined as a general term for filtering or dehumidification-related parts that are independent and can be separated and removed within the housing.

A base portion 130 is installed at the bottom of the filter body 120 to couple with the housing 110 and secure the filter body 120 inside. The base portion 130 is located on the open side of the housing 110, and the base portion 130 functions as a cover of the open side of the housing 110. The base portion 130 partially closes the open surface of the housing 110 and restricts the movement of fluid in the remaining area of the base portion 130 except for the inlet port 171 and the outlet port 172 within the housing. can be sealed. The specific structure of the base portion 130 is not limited to that illustrated in FIG. 2. It is a structure that allows air inflow and outflow to enable treatment and regeneration of compressed air, and the filter body can be inserted or removed by opening and closing the open end of the housing. Any structure that exists can be applied without restrictions.

In addition, in each component inside the air dryer cartridge, in order to sufficiently secure airtightness in the passage through which compressed air moves, sealing members such as O-rings and grooves for inserting and fixing them are formed between the separated components. You can. However, detailed description of these sealing elements will be omitted in the present invention.

The example in FIG. 2 shows an example in which the end portion on the open surface side of the housing and the outer peripheral portion of the base portion are fastened and fixed by cover bolts. Meanwhile, the coupling method of the housing and the base portion in FIG. 2 is an example, and other coupling methods that can be coupled so that the base portion can be separated from the housing may be adopted, and this coupling method is as shown in FIG. 2 in consideration of the user's ease of assembly. It is desirable to adopt a connection method that allows for easy maintenance, such as cover bolts.

Since the air dryer cartridge 1 is typically mounted directly on the valve assembly of the air treatment system, the air dryer cartridge 1 may be provided with a fastening structure for mounting to the air treatment system. In this example, base portion 130 may include a fastening structure for mounting directly to a valve assembly of a compressed air handling system.

In addition, according to a preferred embodiment of the present invention, the filter body 120 must be assembled so as to be replaceable within the housing, and a pressure adjustment unit 200 is provided to adjust the pressure applied to the filter body 120 during assembly or replacement. ) includes.

This pressure adjustment unit 200 may include a spring member 230 capable of applying force toward the filter body 120 and a lifting element 210 for compressing the spring member 230. Additionally, according to a preferred embodiment of the present invention, the spring member should be configured to be compressed or decompressed by the lifting element 210 as the lifting element 210 rotates. To this end, an adapter 220 may be included to guide the lifting element 210 up and down when the lifting element 210 rotates. This adapter 220 may be integrally mounted on the housing of the air dryer cartridge, and may be fixed to the housing by, for example, welding. However, the adapter may be fastened to the housing separately from the housing, and can be changed to another type of assembly structure in which the lifting element can adjust the pressurization state of the spring member according to the rotation of the lifting element while the lifting element is fixed. possible.

In this specification, for convenience of explanation, the adapter is described as a part of the pressure adjustment unit. However, this is for convenience of explanation of the operation of the pressure adjustment unit, and the adapter may be a part formed integrally with the housing.

In relation to the attached drawings, FIG. 2 shows the pressure adjustment unit 200 and the filter body 120 fixed and installed inside the housing, and FIG. 3 shows the main components of the pressure adjustment unit 200. I'm doing it. In addition, Figure 4 shows a cross-section of the cartridge for an air dryer in a state in which the base portion and the housing are separated when the filter body 120 is replaced.

Referring to FIGS. 2 to 4, the pressure adjustment unit 200 is mounted on the upper part of the housing, and adjusts the compression state of the spring between the upper inner surface of the housing and the seating groove of the filter body 120 and moves the pressure toward the filter body 120. It is configured to adjust the applied force.

Specifically, according to a preferred embodiment of the present invention, the pressure adjustment unit 200 includes an adapter 220 capable of closing a hole in the housing, a lifting element 210 capable of moving up and down on the adapter 220, and a lifting element 210 capable of moving up and down on the adapter 220. It may include a spring member 230 located between the element 210 and the inner wall of the housing and compressible toward the inner wall of the housing.

The adapter 220 of the pressure adjustment unit 200 is configured in a shape that can close the upper hole of the housing, and preferably has an insertion body fitted into the upper hole of the housing and extending in the outer circumferential direction, as shown in FIG. 3. It may be formed including a flange portion.

According to a preferred embodiment of the present invention, the adapter 220 of the pressure adjustment unit 200 is formed integrally with the housing and may function as a boss portion of the housing. For example, the adapter 220 may be fixed by welding a flange extending outwardly to the inner wall of the housing.

The lifting element 210 is installed in the adapter 220 so that it can move up and down. To this end, a nut portion may be formed in the center of the adapter 220 so that the lifting element 210 can move up and down while it is inserted.

Additionally, the lifting element 210 is configured to lift the spring member 230 as needed while moving up and down on the adapter 220. For this purpose, the lifting element 210 includes a bolt portion 211 having a thread formed on the outer circumference so as to be fastened to the adapter 220, and a bolt portion 211 for lifting up the spring member 230 while supporting the spring member 230. Includes a lifting operation unit 212. This bolt portion 211 and the lifting operation portion 212 are formed integrally to form the lifting element 210. When the bolt head of the bolt portion 211 is turned, the lifting element ( 210) moves up and down. In particular, when the lifting element moves upward, the lifting operation part 212 of the lifting element 210 can directly support the lower end of the spring member 230 as the bolt part 211 rotates. Therefore, as the bolt portion 211 rises on the adapter 220, the spring member 230 is compressed toward the upper inner surface of the housing, so that the pressurization state of the spring on the filter body 120 can be adjusted. It is composed.

Meanwhile, the lifting element 210 may have an “I”-shaped cross-sectional structure in which the bolt portion 211 and the lifting operation portion 212 are formed integrally. Preferably, the bolt part 211 and the lifting operation part 212 can be divided into two parts that can be assembled by fastening by screwing or the like.

When installing the lifting element 210 having this two-part split structure on the housing, the adapter 220 is fixed to the housing, the bolt portion 211 is inserted and fixed on the adapter 220, and then the spring member The lifting element 210 can be installed by assembling the lifting operation part 212 to the bolt part 211 while the 230 is retracted.

Since airtightness must be formed between the lifting element 210 and the adapter, a sealing member 240 such as an O-ring may be additionally installed to ensure airtightness.

As described above, one end of the spring member 230 of the lifting element 210, that is, the first end coil of the spring member 230, is supported on the inner wall of the housing, and the other end of the spring member 230 depending on the operating state. The end, ie the second end coil, may be supported by the lifting operation unit 212 . Here, the first end coil and the second end coil of the spring member refer to coils at the extreme ends of both sides of the spring member, and these end coils may be flattened end coils for sufficient contact with adjacent surfaces.

Meanwhile, the spring member 230 included in the air dryer cartridge must function to achieve efficient dehumidification by applying a certain pressure to the filter body 120 containing the dehumidifying agent. To this end, the spring member 230 preferably provides a constant pressing force toward the filter body 120 when the air dryer cartridge is installed on the compressed air treatment system.

Therefore, in a preferred embodiment of the present invention, the air dryer cartridge is assembled and the spring member 230 is pressed to provide a constant pressing force to the filter body 120 and a pressure to release the pressing force for replacement of the filter body 120. It can be configured to provide separate release states.

In relation to this pressing force adjustment function, in a preferred embodiment of the present invention, the lifting operation part 212 of the pressure adjustment unit 200 and the spring seating part 124 of the filter body 120 are divided into two parts in the shape of a gear that engages each other. It can be formed into a gear plate structure. The pressing force applied to the seating portion of the filter body 120 by the spring member 230 can be adjusted through the lifting operation portion 212 and the seating portion of the filter body 120, which are composed of such a two-part gear plate structure.

Specifically, as shown in FIG. 3, the lifting operation portion 212 of the pressure adjustment unit 200 includes a gear structure at the bottom, and the seating portion of the filter body 120 is engaged with the gear structure of the lifting plate. It may include a gear structure that can be used.

In this regard, the external gear structure of the lifting operation part 212 and the internal gear structure of the spring seating part 124 of the filter body 120 are configured to mesh with each other. Here, “meshing” means that the two gear structures are completely meshed. This means that the spring seating portion 124 is formed to be exposed to the spring member 230 while being engaged with the spring member 230. Therefore, the two gear structures are configured to be male and female and mesh with each other. In the case of the spring seating portion of the internal gear structure among the two gear structures, the bottom surface exactly conforms to the contour shape of the outer circumference of the external gear structure. It may be configured to have a groove shape. Through this, when the lifting operation part of the external gear structure engages with the spring seating part of the internal gear structure, a part of the internal gear structure of the spring seating part may be exposed to the spring member side. On the other hand, if the lifting operation part of the external gear structure is not meshed with the spring seating part of the internal gear structure, the lifting operation part of the external gear structure is located above the spring seating part, and the internal gear structure of the spring seating part is exposed to the spring member side. It will be blocked.

For example, the lifting operation unit 212 includes a first gear unit having a gear structure, and the filter body 120 includes a spring seating unit formed with a second gear unit having a gear structure that meshes with the first gear unit. It may include (124). At this time, the first gear part of the lifting operation unit 212 may be an external gear with a spur gear structure, and the second gear part of the spring seating part 124 of the filter body 120 may have an internal gear structure meshed with it. there is. In addition, the spring member may contact and support the first gear unit or the second gear unit depending on the meshing state of the first gear unit and the second gear unit, and preferably has an end on the gear tooth side of each gear unit. The coil may be formed to be positioned. For example, the outer diameter of the coil of the spring member may be set to a size similar to the outer diameter of the first gear unit.

To describe the spring seat unit in more detail, the spring seat unit in a preferred embodiment of the present invention provides a seat surface capable of supporting the spring member guided by the filter body 120 among the upper surfaces of the filter body 120. For example, it may be a cup-shaped cylindrical seating portion capable of supporting a spring member. In particular, the bottom surface of the spring seating portion 124 may be structured to engage with the first gear portion of the lifting operation portion 212, and therefore, the second gear portion having a gear shape corresponding to the first gear portion It may be formed in the form of an internal gear structure on the bottom surface.

Specifically, the spring seating portion 124 has a structure in which the gear structure rises from the bottom surface while forming a constant step so that it can have this second gear portion shape. In this structure, in a state in which the first gear part and the second gear part are meshed (FIG. 6(a)), the first gear part of the lifting operation part 212 is completely accommodated in the second gear part and the spring member is connected to the filter body ( It is possible to apply spring force by the spring member to the filter body 120 while directly contacting the spring seating portion 124 of 120). On the other hand, in a state in which the first gear unit and the second gear unit are not engaged (FIG. 6(b)), the lifting operation unit 212 rises above the spring seating unit 124 and moves between the spring seating unit 124 and the spring member. contact is released. If the lifting operation unit 212 is sufficiently raised, the filter body 120 can maintain a sufficiently spaced state from the lifting operation unit 212 due to its own weight, and therefore, the pressure applied to the filter body 120 by the spring member is reduced. The spring force can be released.

Figure 5(a) shows a state in which the filter body is normally installed. As shown in Figure 5(a), the first gear part of the lifting operation unit 212 and the second gear part of the filter body are engaged. In this case, the spring member 230 may press the filter body with sufficient force while contacting the upper surface of the spring seating portion 124.

On the other hand, as shown in FIG. 5(b), when the lifting operation unit 212 rises to a preset height, the meshing state between the first gear unit and the second gear unit is released and the spring member 230 and the spring seating portion 124 may be spaced apart from each other, and thus the pressurization of the filter body 120 by the spring member 230 is released.

Specifically, since the lifting operation unit 212 and the spring seating unit 124 are composed of two divided gear structures that can be meshed with each other, the lifting operation unit 212 is raised to replace the filter body 120. In this case, the engagement state of the lifting operation unit 212 and the spring seating unit 124 is released, and the two divided gear structures as shown in FIG. 5(b) are stacked. In this state, the contact between the spring member 230 and the spring seating portion 124 is released, and the lifting operation portion 212 switches to a state of supporting the spring member 230. Therefore, when the lifting operation unit 212 sufficiently lifts the spring member 230 as shown in FIG. 5(b), the spring force applied to the filter body 120 by the spring member 230 will be completely released. You can.

However, the shape of this gear structure is not limited to the examples of Figures 5(a) and 5(b), and any structure that can selectively provide a meshing state can be applied without limitation.

For example, unlike in Figure 5, as the lifting element 210 rotates and rises, the lifting operation portion 212 of the gear structure naturally rotates and is separated from the gear structure on the spring seating portion 124 of the filter body 120. Each gear structure may be formed to have an inclined surface.

An example including a gear structure with such inclined surfaces is shown in FIG. 7. Specifically, FIG. 7(a) shows the A-A' cross section in the state before the release operation as in FIG. 6(a) in an example of a pressure adjustment unit including a gear structure with an inclined surface, and FIG. 7(b) In the same example as in FIG. 7(a), shows the cross section A-A' in the state after the release operation as in FIG. 6(b).

As shown in FIGS. 7(a) and 7(b), the inclined surface of the lifting operation part is used for the lifting operation of the pressure adjustment unit, that is, the lifting operation part rotates together with the bolt part of the spring seating part 124 of the filter body 120. It can help with the movement of climbing up a slope.

In this case, the angle of the inclined surface may be determined according to the thread angle of the bolt portion 211, and is preferably configured so that the lifting operation portion 212 rises equally along the inclined surface as the bolt portion 211 rotates. can do. However, the angle of the inclined surface is not dependent on the thread angle of the bolt portion 211, and may be selected at an appropriate angle regardless.

In addition, according to another embodiment of the present invention, the gear structure of the lifting operation unit 212 may be a helical external gear, and the gear structure on the spring seating unit 124 may also be an internal gear meshing therewith. Likewise, the inclination of the helical gear may be determined depending on the thread angle of the bolt portion 211.

Additionally, in consideration of convenience of operation during the replacement process, the lifting element 210 may further include a stopper portion 213 having a thicker outer diameter than the threaded portion of the bolt portion 211. This stopper part 213 limits the range of the lifting element 210 that can rise according to the rotation of the bolt part 211, and preferably the position of the stopper part 213 is such that the filter body 120 can be replaced. It can be set according to the height required. For example, the stopper part 213 is sufficiently spaced apart from the spring seating part 124 of the filter body 120 as the lifting operation part 212 rises, so that the lifting operation part 212 directly touches the spring member 230. It can be configured to be located at a height sufficient for compression. Therefore, the worker can rotate the bolt portion 211 until the stopper touches the bottom of the adapter 220 and the bolt portion 211 can no longer be rotated, and then proceed with subsequent replacement work.

Hereinafter, the filter body replacement process will be described with reference to the attached drawings.

First, Figure 5(a) shows the state before the release operation for the pressure adjustment unit 200, and Figure 6(a) shows the pressure adjustment unit 200 before the release operation with the gear structure of the spring seating portion on the upper part of the filter body. It shows the state in which it is positioned correctly. In addition, Figure 5(b) shows the state after the release operation for the pressure adjustment unit 200, and Figure 6(b) shows the state after the release operation, where the pressure adjustment unit 200 has a gear structure of the spring seat portion on the upper part of the filter body. It shows the state in which the meshing is released.

Before the release operation is performed when the air dryer cartridge is removed from the compressed air treatment device, the lifting operation portion 212 of the pressure adjustment unit 200 moves the filter body as shown in FIGS. 5(a) and 6(a). It is maintained in engagement with the spring seating portion 124.

Meanwhile, when the operator rotates the bolt portion 211 to raise the lifting element 210 relative to the adapter 220, the gap between the lifting operation portion 212 and the spring seating portion 124 increases as the lifting element 210 rises. The meshing state is released, and the two gear plates remain separated as shown in FIGS. 5(b) and 6(b). Accordingly, the spring member 230 is released from contact with the spring seating portion 124 of the filter body and is converted to a state supported by the lifting operation portion 212.

When the spring force applied to the filter body by the spring member 230 is released, the base portion is separated from the housing and the filter body is removed through the open end of the housing, as shown in FIG. 4.

Afterwards, the filter body is replaced by inserting a new filter body into the housing, and then the base part is again attached to the open end of the housing to seal the filter body.

After the replaced filter body is stored inside the housing, the pressure adjustment unit 200 is operated to perform a locking operation to provide a constant pressure to the filter body.

In this regard, Figure 8 shows the locking operation process by the pressure adjustment unit, and Figure 8(a) shows a state in which the pressure adjustment unit is not engaged with the gear structure of the spring seat after replacing the filter body, Figure 8 (b) shows the state in which filter body replacement is completed by locking the pressure adjustment unit.

Looking at this locking operation in detail, in a state in which the engagement state between the lifting operation portion 212 and the spring seating portion 124 of the pressure adjustment unit 200 is released (FIG. 8(a)), the lifting element 210 When the lifting operation part 212 is lowered by rotating the bolt part 211 (FIG. 8(b)), the lifting operation part 212 of the lifting element 210 is again connected to the spring seating part 124 of the filter body. A state of engagement is formed. At this time, since the spring member 230 directly pressurizes the filter body, the locking operation may be completed as the compressed spring force of the spring member 230 is applied to the filter body.

The air dryer cartridge with the locking operation completed is mounted back into the compressed air treatment system, and filter body replacement can be completed.

As described above, the air dryer cartridge according to the present invention has the advantage that only the internal filter body can be selectively replaced, and existing structures such as the housing and base can be reused as is. In addition, since the filter body can be replaced by simply removing a few fastening elements (bolts, etc.) while the operator adjusts the pressure adjustment unit, there is an advantage of easy self-replacement. In addition, the filter body can be replaced after removing only the air dryer cartridge without removing the large and heavy compressed air treatment device itself from the vehicle, which has the advantage of simplifying work.

In the above, the present invention has been described in detail based on examples and accompanying drawings. However, the scope of the present invention is not limited by the above embodiments and drawings, and the scope of the present invention will be limited only by the content described in the claims described later.

1: air dryer cartridge 110: housing
120: Filter body 121: Filter body container portion
122: Filter body cover 123: Filter mounting part
130: base part 140: pre-filter
150: Pre-filter holder 160: Gap
200: Pressure adjustment unit 210: Lifting element
211: bolt part 212: lifting operation part
213: stopper part 220: adapter
230: Spring member

Claims (10)

An air dryer cartridge for a compressed air handling system in a commercial vehicle, comprising:
A housing with an open end formed at the bottom;
a filter body stored inside the housing;
a base portion assembled to the open end of the housing to secure the filter body inside the housing; and
It includes a pressure adjustment unit installed on the upper part of the housing and capable of adjusting the force applied to the filter body,
The pressure adjustment unit,
a spring member capable of applying a spring force to the filter body;
a lifting element capable of releasing the spring force applied to the filter body by compressing the spring member to the upper surface of the housing;
Air dryer cartridge containing.
In claim 1,
The pressure adjustment unit is installed on the upper surface of the housing and further includes an adapter having a nut-shaped groove formed therein,
The lifting element is an air dryer cartridge characterized in that it includes a bolt portion inserted into the nut groove of the adapter and a lifting operation portion configured to operate integrally with the bolt portion and compress the spring member.
In claim 2,
The pressure adjustment unit,
As the bolt part is rotated in the compression release direction, the spring member is compressed and the lifting operation part rises, thereby releasing the contact between the filter body and the spring member,
An air dryer cartridge, wherein as the bolt portion is rotated again in a direction opposite to the direction of decompression, the lifting operation portion descends and the spring member is seated on the filter body.
In claim 2,
An air dryer cartridge, wherein the lifting operation part includes a first gear part having a gear structure, and the filter body includes a spring seating part formed with a second gear part having a gear structure that meshes with the first gear part.
In claim 4,
An air dryer cartridge, wherein the spring member presses the upper surface of the spring seating portion when the first gear portion of the lifting operation unit engages with the second gear portion of the filter body.
In claim 4,
An air dryer cartridge, wherein when the lifting operation unit rises to a preset height, the meshing state between the first gear unit and the second gear unit is released, and the spring member and the spring seating unit are spaced apart from each other.
In claim 4,
An air dryer cartridge, wherein the first gear part has an external gear structure, and the second gear part has an internal gear structure.
In claim 7,
The first gear unit is made of a spur gear having a plurality of gear teeth, each gear tooth of the first gear unit has a first inclined surface formed from the lower surface, and each gear tooth of the second gear unit corresponds to the first inclined surface. An air dryer cartridge, characterized in that a second inclined surface is formed.
In claim 2,
The air dryer cartridge, wherein the lifting element further includes a stopper portion capable of contacting the bottom of the adapter to limit the rising height of the lifting element.
A pressurization adjustment unit for replacing the filter body of an air dryer cartridge for compressed air handling systems in commercial vehicles.
It is installed on the upper part of the housing and is configured to adjust the force applied to the filter body.
a spring member capable of applying a spring force to the filter body;
a lifting element capable of releasing the spring force applied to the filter body by compressing the spring member to the upper surface of the housing;
Pressurization adjustment unit for filter body replacement including.

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