WO2020237787A1

WO2020237787A1 - Valve core and nitrogen spring

Info

Publication number: WO2020237787A1
Application number: PCT/CN2019/095710
Authority: WO
Inventors: 孙鹏; 赵文青; 臧贻照; 钟礼宝
Original assignee: 高密同创气门芯有限公司
Priority date: 2018-08-01
Filing date: 2019-07-12
Publication date: 2020-12-03
Also published as: CN210034558U; CN110081213A

Abstract

A valve core and a nitrogen spring, wherein the valve core comprises a core body (1), a through hole cavity is formed in the core body (1), and a stepped hole (12) is formed in the through hole cavity; a core rod (3), which is kept in the through hole cavity, the core rod (3) comprises a sealing portion (31) and a limiting portion (32), wherein the sealing portion (31) is arranged on the outer end of the core body (1), the limiting portion (32) is arranged in the interior of the core body (1), the diameter of the stepped hole (12) is greater than that of the core rod (3), the core rod (3) is arranged to move axially in the stepped hole (12); a sealing pad (2), which is provided with a through hole, the sealing pad (2) is arranged between the end portion of the core body (1) and the sealing portion (31); a gas passage is formed between the stepped hole (12) and the core rod (3); the core rod (3) is arranged to be in a first position when the limiting portion (32) is in contact with the stepped hole (12), so that the gas can pass through the gas passage; the core rod (3) is further arranged to be in a second position when the sealing portion (31) is pressed against the stepped hole (12) through the sealing pad (2), and the through hole cavity is sealed by the sealing pad (2).

Description

气门芯及氮气弹簧Valve core and nitrogen spring

本申请要求申请日为2019年5月31日、申请号为201910472963.4、名称为“一种气门芯及氮气弹簧”的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。This application claims the priority of the Chinese patent application whose application date is May 31, 2019, the application number is 201910472963.4, and the name is "a valve core and nitrogen spring". The entire content of this application is incorporated into this application by reference.

技术领域Technical field

本申请涉及氮气弹簧技术领域，例如涉及一种气门芯及氮气弹簧。This application relates to the technical field of nitrogen gas springs, for example, to a valve core and a nitrogen gas spring.

背景技术Background technique

氮气弹簧是一种具有弹性功能的部件，这种部件称为氮气缸或气体弹簧，简称氮气弹簧，是一种转化压力的器件。氮气弹簧具有体积小，弹力大，寿命长，弹压力恒定的特点。体积小可节约模具空间，弹力大可减少弹簧数量，寿命长可减少模具维修次数，因此降低了模具的总成本。Nitrogen gas spring is a component with elastic function. This component is called nitrogen cylinder or gas spring, or nitrogen spring for short, which is a device that transforms pressure. The nitrogen gas spring has the characteristics of small size, large elastic force, long life and constant elastic pressure. Small size can save mold space, large elasticity can reduce the number of springs, and long life can reduce the number of mold repairs, thus reducing the total cost of the mold.

相关技术中的氮气弹簧气门芯的零件数量一般维持在4-5个零件左右。The number of parts of the nitrogen spring valve core in the related art is generally maintained at about 4-5 parts.

发明内容Summary of the invention

本申请提供了一种气门芯及氮气弹簧，气门芯具有结构简单，生产成本低的特点。The application provides a valve core and a nitrogen gas spring. The valve core has the characteristics of simple structure and low production cost.

一实施例提供了一种气门芯，包括：芯体，所述芯体中有通孔内腔，所述通孔内腔内设置有台阶孔；芯杆，所述芯杆容纳在所述通孔内腔中，所述芯杆包括密封部和限位部，所述密封部设置在芯体外端，所述限位部设置在所述芯体内部，所述台阶孔的直径大于所述芯杆的直径，所述芯杆在所述台阶孔内轴向活动；密封垫，所述密封垫上设有通孔，所述密封垫设置在所述芯体的端部与所述芯杆的密封部之间；及所述台阶孔与所述芯杆之间形成的气体通道；An embodiment provides a valve core, including: a core body with a through-hole cavity in the core body, a stepped hole is provided in the through-hole cavity; a core rod, the core rod is accommodated in the through hole In the inner cavity of the hole, the core rod includes a sealing part and a limiting part, the sealing part is arranged at the outer end of the core, the limiting part is arranged inside the core, and the diameter of the step hole is larger than that of the core. The diameter of the rod, the core rod is axially movable in the step hole; the sealing gasket, the sealing gasket is provided with a through hole, the sealing gasket is arranged at the end of the core and the core rod is sealed Between the parts; and the gas passage formed between the step hole and the core rod;

其中，所述芯杆设置为当所述限位部与所述台阶孔接触时处于第一位置，使气体能够从所述气体通道通过，所述芯杆还设置为当所述密封部通过所述密封垫与所述台阶孔抵压时处于第二位置，并通过密封垫对所述通孔内腔密封。Wherein, the core rod is set to be in the first position when the limiting portion is in contact with the step hole, so that gas can pass through the gas passage, and the core rod is also set to be when the sealing portion passes through the The sealing gasket is in the second position when pressed against the step hole, and the inner cavity of the through hole is sealed by the sealing gasket.

一实施例提供了一种气门芯，包括：芯体，所述芯体具备通孔内腔,所述通孔内腔中形成气体通道，所述通孔内腔内设有配合孔；芯杆，所述芯杆容纳在所述配合孔中，所述芯杆包括密封部和限位部，所述密封部设置在配合孔的外端，所述限位部设置在所述芯体内部；所述配合孔的径向尺寸小于所述通孔内腔远离所述密封部的一端及所述密封部的径向尺寸；及密封件，所述密封件设置在所述芯体的端部与所述芯杆的密封部之间；An embodiment provides a valve core, including: a core body, the core body is provided with a through-hole cavity, a gas channel is formed in the through-hole cavity, and a matching hole is provided in the through-hole cavity; a core rod The core rod is accommodated in the matching hole, the core rod includes a sealing part and a limiting part, the sealing part is arranged at the outer end of the matching hole, and the limiting part is arranged inside the core; The radial dimension of the mating hole is smaller than the end of the through hole cavity away from the sealing portion and the radial dimension of the sealing portion; and a sealing element, the sealing element is provided at the end of the core and Between the sealing parts of the core rod;

其中，所述芯杆在所述配合孔内轴向活动以打开或关闭所述气体通道，所述芯杆设置为当所述限位部抵接于所述芯体时处于第一位置，使所述气体通道处于打开状态，所述芯杆还设置为当所述密封部通过所述密封件抵压于所述芯体时处于第二位置，使所述气体通道关闭。Wherein, the core rod is axially movable in the matching hole to open or close the gas passage, and the core rod is set to be in the first position when the limiting portion abuts against the core body, so that The gas passage is in an open state, and the core rod is also set to be in a second position when the sealing portion is pressed against the core body through the sealing member, so that the gas passage is closed.

一实施例提供了一种氮气弹簧，包括如上所述的气门芯。An embodiment provides a nitrogen gas spring including the valve core as described above.

附图说明Description of the drawings

图1为实施例一提供的气门芯的结构图；Figure 1 is a structural diagram of the valve core provided in the first embodiment;

图2为实施例一提供的气门芯使用时的装配示意图；Figure 2 is a schematic diagram of the assembly of the valve core provided in the first embodiment when in use;

图3为实施例一提供的气门芯充气时的结构示意图；Fig. 3 is a schematic structural diagram of the valve core provided in the first embodiment when inflated;

图4为实施例一提供的气门芯密封时的结构示意图图；4 is a schematic diagram of the structure of the valve core provided in the first embodiment when sealing;

图5为实施例二的气门芯充气时的结构示意图(台阶孔靠近限位部的一端的端口为正六边形)；Figure 5 is a schematic diagram of the structure of the valve core of the second embodiment when it is inflated (the port of the end of the stepped hole near the limit part is a regular hexagon);

图6是图5中沿A-A的剖视图；Figure 6 is a sectional view along A-A in Figure 5;

图7为实施例二提供的气门芯密封时的结构示意图(台阶孔靠近限位部的一端的端口为正六边形)；Figure 7 is a schematic structural diagram of the valve core provided in the second embodiment (the port of the end of the stepped hole close to the limit part is a regular hexagon);

图8a为一实施例提供的气门芯的局部结构示意图(通气槽设置于芯体上)；Figure 8a is a partial structural diagram of a valve core provided by an embodiment (the vent groove is arranged on the core);

图8b为一实施例提供的气门芯的局部结构示意图(通气槽设置于限位部上)；Figure 8b is a partial structural diagram of a valve core provided by an embodiment (the vent groove is arranged on the limit part);

图8c为一实施例提供的气门芯的局部结构示意图(通气槽设置于芯体上)；Figure 8c is a partial structural diagram of a valve core provided by an embodiment (the ventilation groove is arranged on the core);

图8d为一实施例提供的气门芯的局部结构示意图(连通孔设置于芯体上)；Figure 8d is a partial structural diagram of a valve core provided by an embodiment (the communicating hole is provided on the core);

图8e为一实施例提供的气门芯的局部结构示意图(连通孔设置于芯杆上)；Figure 8e is a partial structural diagram of a valve core provided by an embodiment (the communicating hole is arranged on the core rod);

图9为实施例二提供的气门芯充气时的结构示意图(芯杆上设置有通气孔)；Figure 9 is a schematic structural diagram of the valve core provided in the second embodiment (the core rod is provided with a vent hole);

图10是实施例二提供的限位部的加工过程示意图；10 is a schematic diagram of the processing process of the limit part provided in the second embodiment;

图11为实施例二提供的气门芯充气时的结构示意图(芯杆上设置有卡爪)；Figure 11 is a schematic structural diagram of the valve core provided in the second embodiment (the core rod is provided with a claw);

图12a为一实施例提供的气门芯的局部结构示意图(密封圈设置于芯体上)；Figure 12a is a partial structural diagram of a valve core provided by an embodiment (the sealing ring is arranged on the core);

图12b为一实施例提供的气门芯的局部结构示意图(密封圈设置于密封部上)；Figure 12b is a partial structural diagram of a valve core provided by an embodiment (the sealing ring is arranged on the sealing portion);

图12c为一实施例提供的气门芯的局部结构示意图(密封圈设置于芯杆上)；Figure 12c is a partial structural diagram of a valve core provided by an embodiment (the sealing ring is arranged on the core rod);

图12d为一实施例提供的气门芯的局部结构示意图(密封圈套于密封部上)；Figure 12d is a partial structural diagram of a valve core provided by an embodiment (the sealing ring is sleeved on the sealing portion);

图13是实施例二提供的氮气弹簧的结构示意图(气门芯处于打开状态)；Figure 13 is a schematic diagram of the structure of the nitrogen gas spring provided in the second embodiment (the valve core is in an open state);

图14是实施例二提供的氮气弹簧的结构示意图(气门芯处于关闭状态)。Fig. 14 is a schematic structural diagram of the nitrogen gas spring provided in the second embodiment (the valve core is in a closed state).

图中：1-芯体、11-内六方孔、12-台阶孔、13-凸台阶、14-配合孔、2-密封垫、21-凹台阶、3-芯杆、31-密封部、32-限位部、33-盲孔；34-卡爪、41-通气槽、42-凸起；43-连通孔、44-通气孔、51-导向面、52-卡和凸起。In the picture: 1-core, 11-inner hexagonal hole, 12-step hole, 13-convex step, 14-matching hole, 2-seal gasket, 21-concave step, 3-core rod, 31-seal part, 32 -Limiting part, 33-blind hole; 34-claw, 41-vent groove, 42-protrusion; 43-communication hole, 44-vent hole, 51-guide surface, 52-card and protrusion.

具体实施方式Detailed ways

应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步定义和解释。It should be noted that similar reference numerals and letters indicate similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

在本申请的描述中，需要说明的是，术语“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，或者是本申请产品使用时惯常摆放的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”、“第三”等仅用于区分描述，而不能理解为指示或暗示相对重要性。在本申请的描述中，除非另有说明，“多个”的含义是两个或两个以上。In the description of this application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or The positional relationship is based on the position or positional relationship shown in the drawings, or the position or positional relationship that the product of this application is usually placed in use, only for the convenience of describing the application and simplifying the description, and does not indicate or imply the device referred to Or the element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the application. In addition, the terms "first", "second", "third", etc. are only used for distinguishing description, and cannot be understood as indicating or implying relative importance. In the description of this application, unless otherwise specified, "plurality" means two or more.

在本申请的描述中，还需要说明的是，除非另有明确的规定和限定，术语“设置”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or Integrally connected; it can be a mechanical connection or an electrical connection. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in this application can be understood under specific circumstances.

在本申请中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。In this application, unless expressly stipulated and defined otherwise, the "on" or "under" of the first feature of the second feature may include the first and second features in direct contact, or may include the first and second features Not in direct contact but through other features between them. Moreover, "above", "above" and "above" the second feature of the first feature include the first feature being directly above and obliquely above the second feature, or it simply means that the level of the first feature is higher than the second feature. The "below", "below" and "below" the first feature of the second feature include the first feature directly below and obliquely below the second feature, or it simply means that the level of the first feature is smaller than the second feature.

下面详细描述本申请的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本申请，而不能理解为对本申请的限制。The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are only used to explain the present application, and cannot be understood as a limitation to the present application.

实施例一Example one

由于构成气门芯的零部件数量较少，若在不影响气门芯功能的基础上，减少构成气门芯的零件的数量，将大大降低气门芯的制作成本，当然气门芯的结构以及制作工艺的难度以及在使用过程中内轴的脱出风险等都需要考虑到。Since the number of parts constituting the valve core is small, if the number of parts constituting the valve core is reduced without affecting the function of the valve core, the production cost of the valve core will be greatly reduced. Of course, the structure of the valve core and the difficulty of the production process As well as the risk of the inner shaft coming out during use, all need to be considered.

如图1-图4所示，本实施例公开了一种气门芯，该气门芯可以应用于氮气弹簧上，控制氮气弹簧的充气及排气。该气门芯包括芯体1、芯杆3和密封垫2，芯体1中有通孔内腔。芯杆3容纳在通孔内腔中，芯杆3包括杆体，杆体的第一端设有密封部31，杆体的第二端设有限位部32，密封部31设置在芯体1的外端。As shown in Figures 1 to 4, this embodiment discloses a valve core, which can be applied to a nitrogen spring to control the inflation and exhaust of the nitrogen spring. The valve core includes a core body 1, a core rod 3 and a sealing gasket 2. The core body 1 has a through-hole inner cavity. The core rod 3 is accommodated in the inner cavity of the through hole, the core rod 3 includes a rod body, the first end of the rod body is provided with a sealing portion 31, the second end of the rod body is provided with a limiting portion 32, and the sealing portion 31 is provided at the outer end of the core body 1. .

密封垫2上设有通孔，密封垫2设置在芯体1的一端部与芯杆3的密封部31之间，密封部31可以为密封台，密封部31的直径大于密封垫2上的通孔的直径，从而保证密封部31实现对通孔内腔的密封，本实施例仅通过三个零件便实现了氮气弹簧的密封，使制作成本降低了1/5-1/4。The gasket 2 is provided with a through hole. The gasket 2 is arranged between one end of the core 1 and the sealing part 31 of the core rod 3. The sealing part 31 may be a sealing platform, and the diameter of the sealing part 31 is larger than that on the sealing gasket 2. The diameter of the through hole ensures that the sealing portion 31 can seal the inner cavity of the through hole. In this embodiment, the gas spring is sealed by only three parts, which reduces the manufacturing cost by 1/5 to 1/4.

本实施例通孔内腔内设置有台阶孔12，通孔内腔远离密封部31的一端的内径大于台阶孔12的内径，台阶孔12的直径大于芯杆3的直径，芯杆3在台阶孔12内轴向活动，芯杆3设置为当限位部32与台阶孔12接触时处于第一位置，在一实施例中，如图3所示，在所述第一位置，气体能够从所述台阶孔12与所述芯杆3之间的气体通道通过，该气体通道为芯杆3与台阶孔12之间的间隙，通过该间隙能够实现通孔内腔的通气，能够为氮气弹簧充气。限位部32能够对芯杆3进行限位，可以防止在充气时芯杆3从芯体1上脱落。The inner cavity of the through hole of this embodiment is provided with a stepped hole 12. The inner diameter of the end of the inner cavity of the through hole away from the sealing portion 31 is greater than the inner diameter of the stepped hole 12, the diameter of the stepped hole 12 is greater than the diameter of the core rod 3, and the core rod 3 is on the step The hole 12 is axially movable, and the core rod 3 is set to be in the first position when the limiting portion 32 is in contact with the stepped hole 12. In an embodiment, as shown in FIG. 3, in the first position, the gas can move from The gas passage between the step hole 12 and the core rod 3 passes through, and the gas passage is the gap between the core rod 3 and the step hole 12, through which ventilation of the inner cavity of the through hole can be achieved, which can be a nitrogen gas spring Inflated. The limiting part 32 can limit the core rod 3 and prevent the core rod 3 from falling off the core body 1 during inflation.

本实施例中，芯杆3远离密封部31的一端设有一盲孔33，在第一位置时，为了能够使通孔内腔的气体顺畅的进入至台阶孔12与芯杆3之间的气体通道，限位部32与台阶孔12之间存在进气口或通气孔。进气口为限位部32与台阶孔12之间的间隙，芯体1上可以设置连通孔，芯杆3上也可以设置连通孔，连通孔包括第一端口和第二端口。当连通孔设置于芯体1上时，连通孔的第一端口位于台阶孔12的内壁上，连通孔的第二端口位于通孔内腔内的一端面上；当连通孔设置于芯杆3上时，连通孔的第一端口位于芯杆3的外壁上，连通孔的第二端口位于所述盲孔33内，此时，连通孔连通芯杆3与台阶孔12之间的间隙及通孔内腔远离密封部31的一端。在第一位置时，进气口和气体通道共同形成为氮气弹簧充气的通气通道。通气通道在其它实施例中还可以为其他形式，只要能够连通台阶孔12与芯杆3之间的间隙和通孔内腔即可。In this embodiment, the end of the core rod 3 away from the sealing portion 31 is provided with a blind hole 33. In the first position, in order to enable the gas in the cavity of the through hole to smoothly enter the gas between the step hole 12 and the core rod 3. In the passage, there is an air inlet or a vent hole between the limiting portion 32 and the step hole 12. The air inlet is the gap between the limiting portion 32 and the step hole 12, a communicating hole may be provided on the core body 1, and a communicating hole may also be provided on the core rod 3. The communicating hole includes a first port and a second port. When the communicating hole is provided on the core 1, the first port of the communicating hole is located on the inner wall of the step hole 12, and the second port of the communicating hole is located on one end surface of the inner cavity of the through hole; when the communicating hole is provided on the core rod 3 When up, the first port of the communicating hole is located on the outer wall of the core rod 3, and the second port of the communicating hole is located in the blind hole 33. At this time, the communicating hole communicates with the gap and the communication between the core rod 3 and the stepped hole 12. One end of the inner cavity of the hole away from the sealing portion 31. In the first position, the air inlet and the gas passage together form a vent passage for the gas spring. In other embodiments, the vent channel may also have other forms, as long as it can communicate with the gap between the step hole 12 and the core rod 3 and the inner cavity of the through hole.

芯杆3还设置为当密封部31通过密封垫2与台阶孔12抵压时处于第二位置，在一实施例中，如图4所示，在第二位置，密封垫2的第一侧与密封部31抵压，密封垫2的第二侧与芯体1的端面抵压，此时通过密封垫2与芯体1实现对通孔内腔的密封，使氮气弹簧内的氮气不会自行排出。The core rod 3 is also set to be in the second position when the sealing portion 31 is pressed against the step hole 12 by the sealing gasket 2. In an embodiment, as shown in FIG. 4, in the second position, the first side of the sealing gasket 2 Press against the sealing portion 31, and the second side of the gasket 2 presses against the end surface of the core 1. At this time, the gasket 2 and the core 1 are used to seal the inner cavity of the through hole, so that the nitrogen in the nitrogen spring will not Discharge by itself.

密封垫2可以设置在芯体1上，也可以设置在芯杆3上。本实施例设置有密封垫2的芯体1的端部设有凸台阶13，密封垫2上设有与凸台阶13配合的凹台阶21，利用芯体1上的凸台阶13以及密封垫2上的凹台阶21，形成了良好的定位，保证了密封垫2的位置稳定性。密封垫2套设于芯体1上，能够避免在高压条件下，密封垫2产生变形将芯杆3抱死，以致后续气门芯无法打开。密封部31靠近密封垫2的端面及凸台阶13的端面均垂直于台阶孔12的轴线，由于密封垫2受挤压的两个侧面均为平面，密封垫2在受挤压后变形小，密封垫2不易损坏。The sealing gasket 2 can be provided on the core 1 or on the core rod 3. In this embodiment, the end of the core 1 provided with the gasket 2 is provided with a convex step 13, and the gasket 2 is provided with a concave step 21 matching the convex step 13, using the convex step 13 on the core 1 and the gasket 2 The upper concave step 21 forms a good positioning and ensures the position stability of the gasket 2. The gasket 2 is sleeved on the core 1 to avoid deformation of the gasket 2 and lock the core rod 3 under high pressure conditions, so that the subsequent valve core cannot be opened. The end surface of the sealing portion 31 close to the gasket 2 and the end surface of the convex step 13 are both perpendicular to the axis of the step hole 12. Since the two sides of the gasket 2 that are compressed are flat, the gasket 2 is small after being compressed. The gasket 2 is not easily damaged.

在本实施例中，限位部32为对芯杆3设有盲孔33的一端冲压扩口时形成的扩台，限位部32生产制作工艺简单，降低了加工成本。在其它实施例中限位部32也可以通过铆压加工成型。限位部32能够对芯杆3更好地限位，避免充气过程中芯杆3脱离芯体1。冲压扩口形成的限位部32为锥形。芯杆3为圆柱状，为了使限位部32与台阶孔12之间存在间隙以形成进气口，在一实施例中，台阶孔12靠近限位部32的一段为多边形或椭圆形孔，台阶孔12靠近密封部31的一段为圆形孔，或台阶孔12靠近限位部32的一端的截面形状为圆形，但是在台阶孔12靠近限位部32的一端开设有通气槽。在限位部32抵接于台阶孔12时，多边形的边角处、椭圆的弧度较小处或通气槽均与限位部32不接触，会形成限位部32与台阶孔12之间的缝隙，以形成进气口，以使气体顺畅的通过。为了便于加工制作，本实施例中的台阶孔12靠近限位部32的一段为正六边形孔。在其它实施例中也可以为五边形、四边形、八边形孔等等。In this embodiment, the limiting portion 32 is an expanded table formed when the end of the core rod 3 with the blind hole 33 is punched and expanded. The limiting portion 32 has a simple production process and reduces the processing cost. In other embodiments, the limiting portion 32 may also be formed by riveting processing. The limiting portion 32 can better limit the core rod 3 to prevent the core rod 3 from separating from the core body 1 during the inflation process. The limiting portion 32 formed by stamping and flaring is tapered. The core rod 3 is cylindrical. In order to provide a gap between the limiting portion 32 and the stepped hole 12 to form an air inlet, in one embodiment, a section of the stepped hole 12 close to the limiting portion 32 is a polygonal or elliptical hole. A section of the stepped hole 12 close to the sealing portion 31 is a circular hole, or the cross-sectional shape of the end of the stepped hole 12 close to the limiting portion 32 is circular, but an end of the stepped hole 12 close to the limiting portion 32 is provided with a ventilation groove. When the limiting portion 32 abuts on the stepped hole 12, the corners of the polygon, the small arc of the ellipse, or the ventilation grooves are not in contact with the limiting portion 32, and a gap between the limiting portion 32 and the stepped hole 12 will be formed. Gap to form an air inlet to allow gas to pass smoothly. In order to facilitate processing and manufacturing, a section of the stepped hole 12 close to the limiting portion 32 in this embodiment is a regular hexagonal hole. In other embodiments, it may also be a pentagon, a quadrilateral, an octagonal hole, etc.

本实施例中，通孔内腔内还设有与台阶孔12相对的内六方孔11，内六方孔11远离密封部31设置，所述台阶孔12靠近所述密封部31设置，内六角螺栓***内六方孔11内可以将芯体1旋紧于氮气弹簧上。芯体1远离密封部31的一端的外壁上设有螺纹，方便芯体1安装在氮气弹簧上。In this embodiment, the inner cavity of the through hole is also provided with an inner hexagonal hole 11 opposite to the stepped hole 12. The inner hexagonal hole 11 is located away from the sealing portion 31, and the stepped hole 12 is located close to the sealing portion 31. Inserting into the inner hexagonal hole 11 can screw the core 1 onto the nitrogen gas spring. A thread is provided on the outer wall of the end of the core 1 away from the sealing portion 31 to facilitate the installation of the core 1 on the nitrogen gas spring.

芯杆3及芯体1的材质为金属，本实施例中为黄铜。本实施例中，密封垫2的材质为橡胶，在其它实施例中还可以为硅胶等。The material of the core rod 3 and the core body 1 is metal, and brass in this embodiment. In this embodiment, the material of the gasket 2 is rubber, and in other embodiments, it may also be silica gel or the like.

本实施例具体的运行原理：如图3和图4所示，为本实施例的充气状态图，此时芯杆3在外界压力P1作用下使得限位部32与台阶孔12接触，氮气通过台阶孔12与芯杆3之间的间隙进入氮气弹簧腔体内，充气结束后，氮气弹簧内部压力P2大于外界大气压力，此时芯杆3的密封部31与密封垫2接触并抵接实现密封。The specific operating principle of this embodiment: as shown in Figures 3 and 4, which are the inflation state diagrams of this embodiment, at this time, the core rod 3 makes the limit part 32 contact with the step hole 12 under the action of the external pressure P1, and the nitrogen gas passes through The gap between the step hole 12 and the core rod 3 enters the nitrogen spring cavity. After the inflation is completed, the internal pressure P2 of the nitrogen spring is greater than the outside atmospheric pressure. At this time, the sealing portion 31 of the core rod 3 contacts and abuts against the gasket 2 to achieve sealing .

本实施例还公开了一种氮气弹簧，该氮气弹簧的充气口处安装了上述的气门芯。参照图3，充气时，外界的高压气体会推动芯杆3沿台阶孔12的轴线滑动，限位部32与台阶孔12接触，此时气门芯打开，气体可以顺着芯杆3与台阶孔12的侧壁之间的间隙进入至氮气弹簧内。在气门芯打开时，限位部32能够避免芯杆3从芯体1上脱落。This embodiment also discloses a nitrogen gas spring, and the above-mentioned valve core is installed at the charging port of the nitrogen gas spring. Referring to Figure 3, when inflating, high-pressure air from outside will push the core rod 3 to slide along the axis of the step hole 12, and the limiting portion 32 contacts the step hole 12. At this time, the valve core opens and the gas can follow the core rod 3 and the step hole. The gap between the side walls of 12 enters into the nitrogen gas spring. When the valve core is opened, the limiting portion 32 can prevent the core rod 3 from falling off the core body 1.

参照图4，当充气完成之后在氮气弹簧内的高压气体的压力下，密封部31向靠近芯体1的方向移动，使密封部31抵压于密封垫2的第一侧，密封垫2的第二侧抵压于凸台阶13的端面，密封部31配合密封垫2将芯杆3与台阶孔12之间的间隙封堵，气门芯关闭氮气弹簧内的高压气体无法排出。4, when the inflation is completed, under the pressure of the high-pressure gas in the nitrogen spring, the sealing portion 31 moves toward the core 1 so that the sealing portion 31 is pressed against the first side of the sealing gasket 2, and the sealing gasket 2 The second side presses against the end surface of the convex step 13, the sealing portion 31 cooperates with the gasket 2 to block the gap between the core rod 3 and the step hole 12, and the high-pressure gas in the nitrogen spring cannot be discharged when the valve core is closed.

氮气弹簧需要排气时，使用外部顶针顶着芯杆3沿台阶孔12的轴向滑动，使限位部32向里运动，密封部31不再抵压于密封垫2，密封垫2无法封堵芯杆3与台阶孔12的间隙，氮气弹簧内的气体顺着间隙排出。When the nitrogen gas spring needs to be vented, use an external thimble against the core rod 3 to slide along the axial direction of the stepped hole 12, so that the limiting portion 32 moves inward, and the sealing portion 31 no longer presses against the gasket 2, and the gasket 2 cannot be sealed. Plug the gap between the core rod 3 and the step hole 12, and the gas in the nitrogen spring is discharged along the gap.

实施例二Example two

如图5-图11所示，本实施例公开了一种气门芯，包括气体通道，该气门芯可以应用于氮气弹簧上，控制氮气弹簧的充气及排气。在一实施例中，该气门芯还包括芯体1、芯杆3和密封件，芯体1设置有通孔内腔，通孔内腔的一端为一配合孔14。芯杆3容纳在配合孔14中，芯杆3包括杆体，杆体的第一端设有密封部31，杆体的第二端设有限位部32，当气门芯安装好时，密封部31设置在芯体1的外端。As shown in FIGS. 5 to 11, this embodiment discloses a valve core including a gas channel. The valve core can be applied to a nitrogen gas spring to control the charging and exhaust of the gas spring. In an embodiment, the valve core further includes a core body 1, a core rod 3 and a sealing member. The core body 1 is provided with a through-hole cavity, and one end of the through-hole cavity is a matching hole 14. The core rod 3 is accommodated in the fitting hole 14. The core rod 3 includes a rod body. The first end of the rod body is provided with a sealing part 31, and the second end of the rod body is provided with a limiting part 32. When the valve core is installed, the sealing part 31 is arranged at The outer end of the core 1.

密封件设置在芯体1的一端部与芯杆3的密封部31之间，密封件上设有通孔，芯杆3穿设于配合孔14和密封件的通孔。密封部31可以为密封台，密封台可以通过冲压形成，密封部31的外缘外伸于密封件的通孔的外侧，从而保证密封部31实现密封，密封台可以为圆台形。在其它实施例中密封台也可以通过铆压加工而成。The sealing element is arranged between one end of the core body 1 and the sealing portion 31 of the core rod 3, the sealing element is provided with a through hole, and the core rod 3 penetrates the matching hole 14 and the through hole of the sealing element. The sealing portion 31 may be a sealing table, which may be formed by stamping, and the outer edge of the sealing portion 31 extends outside the through hole of the sealing member to ensure that the sealing portion 31 is sealed, and the sealing table may have a truncated cone shape. In other embodiments, the sealing table can also be formed by riveting.

请参照图5和图7，限位部32为一扩台，扩台在远离密封部31的方向上逐渐向外扩张并伸出于配合孔14的端口的外侧，扩台能够抵接于配合孔14的一端，实现对芯杆3的限位。在一实施例中，扩台外缘突出于配合孔14内壁的距离a大于等于0.2mm，以对芯杆3进行更有效的限位，避免充气过程中芯杆3脱离芯体1造成安全事故。Please refer to Figures 5 and 7, the limiting portion 32 is an expansion platform, and the expansion platform gradually expands outward in the direction away from the sealing portion 31 and protrudes outside the port of the mating hole 14. The expansion platform can abut against the fitting One end of the hole 14 realizes the limitation of the core rod 3. In one embodiment, the distance a between the outer edge of the expansion platform and the inner wall of the mating hole 14 is greater than or equal to 0.2 mm, so as to more effectively limit the core rod 3 and prevent the core rod 3 from separating from the core body 1 during the inflation process and causing safety accidents. .

如图5-图7所示，通孔内腔远离密封部31的一端的径向尺寸大于配合孔14的径向尺寸，配合孔14的径向尺寸大于芯杆3的杆体的径向尺寸，芯杆3能够在配合孔14内轴向活动并在第一位置及第二位置间切换，以打开或关闭气体通道。As shown in Figs. 5-7, the radial dimension of the end of the through-hole cavity away from the sealing portion 31 is greater than the radial dimension of the fitting hole 14, and the radial dimension of the fitting hole 14 is greater than the radial dimension of the rod body of the core rod 3. The core rod 3 can move axially in the matching hole 14 and switch between the first position and the second position to open or close the gas passage.

限位部32抵接于芯体1时为第一位置，在一实施例中，如图5所示，在所述第一位置，密封部31与芯体1分离，气体通道处于打开状态，气体能够从所述气体通道通过实现通孔内腔的通气，能够为氮气弹簧或其他装置充气。限位部32能够对芯杆3进行限位，可以防止在充气时芯杆3从芯体1上脱落。The limiting portion 32 is in the first position when it abuts against the core 1. In one embodiment, as shown in FIG. 5, in the first position, the sealing portion 31 is separated from the core 1, and the gas channel is in an open state. The gas can pass through the gas channel to ventilate the cavity of the through hole, and can inflate a nitrogen gas spring or other devices. The limiting part 32 can limit the core rod 3 and prevent the core rod 3 from falling off the core body 1 during inflation.

密封部31通过密封件与芯体1相抵压时为第二位置，如图7所示，而在第二位置，密封件的第一侧被密封部31抵压，密封件的第二侧被芯体1的端面抵压，通过密封件与芯体1实现气体通道一端的密封，使氮气弹簧内的氮气不会自行排出。The sealing part 31 is in the second position when it is pressed against the core 1 by the sealing part, as shown in FIG. 7. In the second position, the first side of the sealing part is pressed by the sealing part 31, and the second side of the sealing part is pressed by the sealing part 31. The end face of the core body 1 is pressed against the pressure, and one end of the gas channel is sealed by the sealing member and the core body 1, so that the nitrogen in the nitrogen spring will not be discharged by itself.

本实施例中，在第一位置时，为了能够使通孔内腔的气体顺畅的进入至配合孔14与芯杆3之间的气体通道，限位部32与配合孔14之间存在进气口。气体通道为芯杆3与配合孔14之间的间隙，进气口为限位部32与配合孔14之间的缝隙或槽口。为了便于加工制作，在一实施例中，限位部32的外周面为圆锥面，芯杆3杆体为圆柱状，配合孔14靠近限位部32的一端的端口为多边形或椭圆形孔，在限位部32抵接于配合孔14一端时，多边形的边角处、椭圆的弧度较小处或通气槽与限位部32均不接触，会形成限位部32与配合孔14之间的缝隙，以形成进气口，以使气体顺畅的通过。In this embodiment, in the first position, in order to enable the gas in the cavity of the through hole to smoothly enter into the gas passage between the fitting hole 14 and the core rod 3, there is an air intake between the limiting portion 32 and the fitting hole 14. mouth. The gas passage is the gap between the core rod 3 and the matching hole 14, and the air inlet is the gap or notch between the limiting portion 32 and the matching hole 14. In order to facilitate processing and manufacturing, in one embodiment, the outer peripheral surface of the limiting portion 32 is a conical surface, the rod body of the core rod 3 is cylindrical, and the port of the fitting hole 14 near the end of the limiting portion 32 is a polygonal or elliptical hole. When the limiting portion 32 abuts against one end of the mating hole 14, the corners of the polygon, the small arc of the ellipse, or the ventilation groove and the limiting portion 32 are not in contact, which will form a gap between the limiting portion 32 and the matching hole 14. Gap to form an air inlet to allow gas to pass smoothly.

如图6所示，本实施例中的配合孔14为台阶孔，降低了加工难度，配合孔14靠近限位部32的一段为多边形孔，比如正五边形或正六边形孔等等，配合孔14靠近密封部31的一段为圆形孔，多边形孔与圆形孔交界处形成台阶。在其他实施例中，配合孔14可以为贯通的多边形孔或椭圆形孔。As shown in FIG. 6, the matching hole 14 in this embodiment is a stepped hole, which reduces the processing difficulty. A section of the matching hole 14 close to the limiting portion 32 is a polygonal hole, such as a regular pentagonal or regular hexagonal hole. A section of the fitting hole 14 close to the sealing portion 31 is a circular hole, and a step is formed at the junction of the polygonal hole and the circular hole. In other embodiments, the matching hole 14 may be a through polygonal hole or an elliptical hole.

在其他实施例中，进气口可以通过其他方式形成。比如在配合孔14靠近限位部32的一端开设有通气槽41，具体请参照图8a；或者在限位部32上开设有通气槽41，具体请参照图8b；又比如在配合孔14靠近限位部32的一端周向间隔布设多个凸起42，具体请参照图8c；再比如限位部32的外周面为多棱锥形，配合孔14为圆形；等等，只要能够实现限位部32的外周面与配合孔14的端口不相匹配，在第一位置时两者间断地相抵接即可。或者，也可以在芯体1或芯杆3上设置连通孔43，连通孔包括第一端口和第二端口；请参照图8d，当连通孔43设置在芯体1上时，连通孔43的第一端口位于配合孔14的内壁上，连通孔43的第二端口位于通孔内腔内的一台阶面上，气体通道包括芯杆3与配合孔14之间的间隙及该连通孔43，气体通道的进气口为连通孔43一端的端口；请参照图8e，当连通孔43设置在芯杆3上，连通孔43的第一端口位于芯杆3的外壁上，连通孔43的第二端口位于芯杆3的盲孔33内，且当芯杆3位于第一位置时，连通孔43的第一端口位于配合孔14内，气体通道包括芯杆3与配合孔14之间的间隙及该连通孔43，气体通道的进气口为连通孔43位于盲孔内的端口。In other embodiments, the air inlet may be formed in other ways. For example, a venting groove 41 is opened at one end of the fitting hole 14 close to the limiting portion 32, please refer to Fig. 8a for details; or a venting groove 41 is opened on the limiting portion 32, please refer to Fig. 8b for details; for another example, the fitting hole 14 is close to A plurality of protrusions 42 are arranged circumferentially at one end of the limiting portion 32, please refer to Fig. 8c for details; for another example, the outer peripheral surface of the limiting portion 32 is a polygonal pyramid, and the mating hole 14 is circular; etc., as long as the limitation can be achieved The outer peripheral surface of the position portion 32 does not match the port of the mating hole 14, and it is sufficient that the two abut intermittently in the first position. Alternatively, a communicating hole 43 may be provided on the core 1 or the core rod 3. The communicating hole includes a first port and a second port; please refer to Figure 8d, when the communicating hole 43 is provided on the core 1, the communicating hole 43 The first port is located on the inner wall of the matching hole 14, the second port of the communicating hole 43 is located on a step surface in the inner cavity of the through hole, and the gas passage includes the gap between the core rod 3 and the matching hole 14 and the communicating hole 43, The air inlet of the gas passage is the port at one end of the communicating hole 43; please refer to Figure 8e, when the communicating hole 43 is provided on the core rod 3, the first port of the communicating hole 43 is located on the outer wall of the core rod 3, and the first port of the communicating hole 43 is The second port is located in the blind hole 33 of the core rod 3, and when the core rod 3 is in the first position, the first port of the communicating hole 43 is located in the fitting hole 14, and the gas passage includes the gap between the core rod 3 and the fitting hole 14. And the communicating hole 43, the air inlet of the gas channel is a port where the communicating hole 43 is located in the blind hole.

在其他实施例中，气体通道还可以直接设置在芯杆3上，请参照图9，在芯杆3上设置通气孔44，芯杆3远离密封部31的一端设有一盲孔33，通气孔44第一端的端口位于芯杆3盲孔内，通气孔44第一端的端口数量可以为一个或多个，通气孔44第二端的端口位于芯杆靠近密封部31一端外壁上，且在第一位置时，通气孔44第二端的端口位于配合孔14外，且数量为多个，比如2-4个，通气孔44第二端的多个端口沿周向间隔布设，使得充气过程顺畅且芯杆3不会与芯体1发生挤压变形，气体通道为该通气孔44，气体通道的进气口为通气孔44位于盲孔33内的端口。In other embodiments, the gas channel can also be directly arranged on the core rod 3. Referring to FIG. 9, a vent hole 44 is provided on the core rod 3, and the end of the core rod 3 away from the sealing portion 31 is provided with a blind hole 33, the vent hole The port at the first end of 44 is located in the blind hole of the core rod 3. The number of ports at the first end of the vent 44 can be one or more. The port at the second end of the vent 44 is located on the outer wall of the end of the core rod close to the sealing part 31, and In the first position, the port at the second end of the vent hole 44 is located outside the fitting hole 14, and the number is multiple, such as 2-4. The multiple ports at the second end of the vent hole 44 are arranged at intervals in the circumferential direction, so that the inflation process is smooth and The core rod 3 will not be squeezed and deformed with the core body 1, the gas channel is the vent hole 44, and the air inlet of the gas channel is the port where the vent hole 44 is located in the blind hole 33.

请参照图9和图10，本实施例中，扩台通过对芯杆3一端进行铆压或冲压形成。在芯杆3远离密封部31的一端开设一盲孔33，芯杆3的一端贯穿配合孔14安装到位后，对芯杆3设置盲孔33的一端进行铆压或冲压形成扩台。本实施例提供的气门芯，生产制作工艺简单，仅通过三个零件便实现了氮气弹簧的密封，使制作成本降低了1/5-1/4。Please refer to FIGS. 9 and 10. In this embodiment, the expansion stage is formed by riveting or stamping one end of the core rod 3. A blind hole 33 is opened at the end of the core rod 3 away from the sealing portion 31. After one end of the core rod 3 penetrates the fitting hole 14 and is installed in place, the end of the core rod 3 with the blind hole 33 is riveted or punched to form an expanded platform. The valve core provided by this embodiment has a simple production process, and the sealing of the nitrogen gas spring is realized by only three parts, and the production cost is reduced by 1/5 to 1/4.

如图11所示，在其它实施例中，芯杆3远离密封部31的一端沿周向间隔布设多个卡爪34，卡爪34远离密封部31的一端设置有卡钩，卡钩伸出于配合孔14的一端时，卡爪34能够沿配合孔14的径向胀缩，即卡爪34位于配合孔14中时处于收缩状态，卡钩伸出配合孔14的一端后，卡爪34回弹，以使得卡爪34能够穿设于配合孔14并与芯体1卡合；卡钩形成限位部32，相邻卡爪34之间的通槽及芯杆3与芯体1之间的间隙形成气体通道。卡钩远离密封部31一侧设置有导向面51，导向面51在远离限位部32的方向上逐渐收拢，导向面51可以为圆锥面或斜面等，本实施例中导向面为圆锥面，锥角θ可以为90-120度，以便于芯杆3的安装；在一实施例中，卡钩靠近密封部31的一侧设置有限位面，限位面在远离限位部32方向上逐渐收拢与杆体外周面形成一限位槽，且芯体1的通孔内腔台阶面上设置有卡合凸起52，卡合凸起52可嵌入至限位槽内并与限位槽相配合，使得可以对芯杆3进行更好地限位，避免充气过程中芯杆3脱离芯体造成安全事故。此时，配合孔14的形状可以是圆形，也可以是多边形、椭圆形或其它形状，只要是能够保证配合孔14的径向尺寸小于通孔内腔远离密封部31的一端的径向尺寸，为卡钩的抵接提供一个接触面即可。As shown in FIG. 11, in other embodiments, the end of the core rod 3 away from the sealing portion 31 is provided with a plurality of claws 34 at intervals in the circumferential direction. The end of the claws 34 away from the sealing portion 31 is provided with a hook, and the hooks extend When at one end of the mating hole 14, the claw 34 can expand and contract along the radial direction of the mating hole 14, that is, the claw 34 is in a contracted state when located in the mating hole 14. After the hook extends out of one end of the mating hole 14, the claw 34 Resilience, so that the claw 34 can penetrate the mating hole 14 and engage with the core 1; the hook forms a limit portion 32, the through groove between the adjacent claws 34 and the core rod 3 and the core 1 The gap between forms a gas channel. A guide surface 51 is provided on the side of the hook away from the sealing portion 31. The guide surface 51 is gradually condensed in the direction away from the limiting portion 32. The guide surface 51 may be a conical surface or an inclined surface. In this embodiment, the guide surface is a conical surface. The taper angle θ can be 90-120 degrees to facilitate the installation of the core rod 3. In one embodiment, a limit surface is provided on the side of the hook close to the sealing portion 31, and the limit surface gradually moves away from the limit portion 32. The constriction and the outer peripheral surface of the rod form a limiting groove, and the step surface of the through hole inner cavity of the core 1 is provided with an engaging protrusion 52, which can be embedded in the limiting groove and facing the limiting groove. The fit makes it possible to better limit the core rod 3 and avoid safety accidents caused by the core rod 3 being separated from the core body during the inflation process. At this time, the shape of the mating hole 14 can be circular, polygonal, elliptical or other shapes, as long as it can ensure that the radial dimension of the mating hole 14 is smaller than the radial dimension of the end of the through hole cavity away from the sealing portion 31 , Just provide a contact surface for the abutment of the hook.

密封件可以设置在芯体1上，也可以设置在芯杆3上。如图5、图7和图9所示，本实施例中，密封件可以为密封垫2，设置有密封垫2的芯体1端部设有凸台阶13，密封垫2上设有与凸台阶13配合的凹台阶21，利用芯体1上的凸台阶13以及密封垫2上的凹台阶21，形成了良好的定位，保证了密封垫2的位置稳定性。密封垫2套设于芯体1上，能够避免在高压条件下，密封垫2产生变形，将芯杆3抱死，以致后续气门芯无法打开。同时，密封垫2套设于芯体1一端，使得气门芯安装至氮气弹簧或其他装置时，密封垫2可以与安装孔内壁抵接并密封安装孔，保证氮气弹簧或其他装置不会漏气。密封部31靠近密封垫2的端面及凸台阶13的端面均垂直于配合孔14的轴线，由于密封垫2受挤压的两个侧面均为平面，密封垫2在受挤压后变形小，密封垫2不易损坏。The sealing element can be provided on the core 1 or on the core rod 3. As shown in Figures 5, 7 and 9, in this embodiment, the sealing element can be a gasket 2. The end of the core 1 provided with the gasket 2 is provided with a convex step 13, and the gasket 2 is provided with a convex The concave step 21 matched by the step 13 uses the convex step 13 on the core 1 and the concave step 21 on the gasket 2 to form a good positioning and ensure the position stability of the gasket 2. The gasket 2 is sleeved on the core 1 to prevent the gasket 2 from being deformed under high pressure conditions, which will lock the core rod 3, so that the subsequent valve core cannot be opened. At the same time, the gasket 2 is sleeved on one end of the core 1, so that when the valve core is installed on a nitrogen gas spring or other device, the gasket 2 can abut against the inner wall of the installation hole and seal the installation hole to ensure that the gas spring or other devices will not leak air . The end face of the sealing portion 31 close to the gasket 2 and the end face of the convex step 13 are both perpendicular to the axis of the mating hole 14. Since the two sides of the gasket 2 that are compressed are flat, the gasket 2 is less deformed after being compressed. The gasket 2 is not easily damaged.

请参照图12a-12d，在其它实施例中，密封件可以为密封圈，密封圈可以直接嵌入芯体1一端凹槽内，或者密封圈也可以嵌入至密封部31靠近芯体1的一端面内；密封件可以为密封垫2，密封垫2可以直接套设在芯杆3杆体上，或者密封垫2上设置有与密封部31相配合的凹槽，密封垫2套设于密封部31上，密封垫2与芯体1的接触面为平面。12a-12d, in other embodiments, the sealing element may be a sealing ring, the sealing ring can be directly embedded in the groove at one end of the core 1, or the sealing ring can also be embedded in the sealing portion 31 near the end surface of the core 1 The seal can be a gasket 2, which can be directly sleeved on the rod of the core rod 3, or the gasket 2 is provided with a groove matching the sealing portion 31, and the gasket 2 is sleeved on the sealing portion 31 Above, the contact surface between the gasket 2 and the core 1 is flat.

本实施例中，通孔内腔内还设有与配合孔14相对的内六方孔11，内六方孔11远离密封部31设置，所述台阶孔12靠近所述密封部31设置，内六角螺栓***内六方孔11内可以将芯体1旋紧于氮气弹簧上。芯体1远离密封部31的一端的外壁上设有螺纹，方便芯体1安装在氮气弹簧上。In this embodiment, the inner cavity of the through hole is also provided with an inner hexagonal hole 11 opposite to the matching hole 14. The inner hexagonal hole 11 is located away from the sealing portion 31, and the stepped hole 12 is located close to the sealing portion 31. Inserting into the inner hexagonal hole 11 can screw the core 1 onto the nitrogen gas spring. A thread is provided on the outer wall of the end of the core 1 away from the sealing portion 31 to facilitate the installation of the core 1 on the nitrogen gas spring.

本实施例具体的运行原理：如图5所示，为本实施例的充气状态图，此时芯杆3在外界压力作用下使得限位部32与配合孔14接触，氮气通气体通道进入氮气弹簧腔体内，充气结束后，氮气弹簧内部压力大于外界大气压力，此时芯杆3的密封部31与密封垫2接触并抵接实现密封。The specific operating principle of this embodiment: as shown in FIG. 5, which is the inflation state diagram of this embodiment, at this time, the core rod 3 makes the limit part 32 contact with the fitting hole 14 under the action of the external pressure, and the nitrogen gas flow channel enters the nitrogen gas. In the spring cavity, after the inflation is completed, the internal pressure of the nitrogen gas spring is greater than the external atmospheric pressure. At this time, the sealing portion 31 of the core rod 3 contacts and abuts against the sealing gasket 2 to achieve sealing.

请参照图13和图14，本实施例还公开了一种氮气弹簧，该氮气弹簧的充气口处安装了上述的气门芯。充气时，在外界的高压气体作用下，推动芯杆3沿配合孔14的轴线滑动，限位部32与配合孔14接触，此时气门芯打开，气体可以顺着芯杆3与配合孔14的侧壁之间的间隙进入至氮气弹簧内。在气门芯打开时，限位部32能够避免芯杆3从芯体1上脱落。Please refer to Figures 13 and 14. This embodiment also discloses a nitrogen gas spring, and the gas valve core is installed at the gas filling port of the nitrogen gas spring. When inflating, the core rod 3 is pushed to slide along the axis of the fitting hole 14 under the action of the external high-pressure gas, and the limiting portion 32 contacts the fitting hole 14. At this time, the valve core is opened and the gas can follow the core rod 3 and the fitting hole 14 The gap between the side walls of the gas enters into the nitrogen gas spring. When the valve core is opened, the limiting portion 32 can prevent the core rod 3 from falling off the core body 1.

当充气完成之后在氮气弹簧内的高压气体的压力下，密封部31向靠近芯体1的方向移动，使密封部31抵压于密封垫2的第一侧，密封垫2的第二侧抵压于凸台阶13的端面，密封部31配合密封垫2将芯杆3与配合孔14之间的间隙封堵，气门芯关闭，氮气弹簧内的高压气体无法排出。When the inflation is completed, under the pressure of the high-pressure gas in the nitrogen spring, the sealing portion 31 moves toward the core 1 so that the sealing portion 31 is pressed against the first side of the gasket 2 and the second side of the gasket 2 is pressed against Pressing on the end surface of the convex step 13, the sealing portion 31 cooperates with the gasket 2 to block the gap between the core rod 3 and the fitting hole 14, the valve core is closed, and the high pressure gas in the nitrogen spring cannot be discharged.

氮气弹簧需要排气时，使用外部顶针顶着芯杆3沿配合孔14的轴向滑动，使限位部32向里运动，密封部31不再抵压于密封垫2，密封垫2和密封部31无法封堵芯杆3与配合孔14的间隙，氮气弹簧内的气体顺着间隙排出。When the nitrogen gas spring needs to be vented, use an external thimble against the core rod 3 to slide along the axial direction of the mating hole 14, so that the limiting portion 32 moves inward, and the sealing portion 31 no longer presses against the gasket 2, the gasket 2 and the seal The part 31 cannot block the gap between the core rod 3 and the matching hole 14, and the gas in the nitrogen gas spring is discharged along the gap.

Claims

一种气门芯，包括：A valve core, including:

芯体(1)，所述芯体(1)中有通孔内腔，所述通孔内腔内设置有台阶孔(12)；A core body (1) having a through-hole cavity in the core body (1), and a stepped hole (12) is provided in the through-hole cavity;

芯杆(3)，所述芯杆(3)容纳在所述通孔内腔中，所述芯杆(3)包括密封部(31)和限位部(32)，所述密封部(31)设置在芯体(1)外端，所述限位部(32)位于所述芯体(1)内部，所述台阶孔(12)的直径大于所述芯杆(3)的直径，所述芯杆(3)设置为在所述台阶孔(12)内轴向活动；A core rod (3), the core rod (3) is accommodated in the cavity of the through hole, the core rod (3) includes a sealing portion (31) and a limiting portion (32), the sealing portion (31) ) Is arranged at the outer end of the core (1), the limiting portion (32) is located inside the core (1), the diameter of the step hole (12) is greater than the diameter of the core rod (3), so The core rod (3) is arranged to move axially in the stepped hole (12);

密封垫(2)，所述密封垫(2)上设有通孔，所述密封垫(2)设置在所述芯体(1)的端部与所述密封部(31)之间；及A gasket (2), the gasket (2) is provided with a through hole, and the gasket (2) is arranged between the end of the core (1) and the sealing portion (31); and

所述台阶孔(12)与所述芯杆(3)之间形成的气体通道；A gas channel formed between the step hole (12) and the core rod (3);

其中，所述芯杆(3)设置为当所述限位部(32)与所述台阶孔(12)接触时处于第一位置，使气体能够从所述气体通道通过，所述芯杆(3)还设置为当所述密封部(31)通过所述密封垫(2)与所述台阶孔(12)抵压时处于第二位置，并通过密封垫(2)对所述通孔内腔密封。Wherein, the core rod (3) is set to be in the first position when the limiting portion (32) is in contact with the step hole (12), so that gas can pass through the gas passage, and the core rod ( 3) It is also set to be in the second position when the sealing portion (31) is pressed against the stepped hole (12) through the sealing gasket (2), and is positioned in the through hole through the sealing gasket (2) The cavity is sealed.
根据权利要求1所述的气门芯，其中，所述气体通道包括进气口，所述限位部(32)设置为当所述芯杆(3)处于第一位置时，与所述台阶孔(12)形成使气体流通的所述进气口。The valve core according to claim 1, wherein the gas passage includes an air inlet, and the limiting portion (32) is arranged to be in contact with the step hole when the core rod (3) is in the first position (12) Form the air inlet through which gas flows.
根据权利要求2所述的气门芯，其中，所述限位部(32)的外周面为圆锥面,且所述圆锥面在远离所述密封部(31)的方向上逐渐向外扩张；The valve core according to claim 2, wherein the outer peripheral surface of the limiting portion (32) is a conical surface, and the conical surface gradually expands outward in a direction away from the sealing portion (31);

所述台阶孔(12)靠近所述限位部(32)的一端的端口形状为多边形或椭圆形；或The port shape of the end of the stepped hole (12) close to the limiting portion (32) is polygonal or oval; or

所述台阶孔(12)靠近所述限位部(32)的一端或所述限位部(32)上开设有通气槽。One end of the step hole (12) close to the limiting portion (32) or a venting groove is provided on the limiting portion (32).
根据权利要求1所述的气门芯，其中，所述密封垫(2)套设于所述芯体(1)的一端，所述芯体(1)设置有所述密封垫(2)的一端设有凸台阶(13)，所述密封垫(2)上设有与所述凸台阶(13)配合的凹台阶(21)。The valve core according to claim 1, wherein the gasket (2) is sleeved on one end of the core (1), and the core (1) is provided with one end of the gasket (2) A convex step (13) is provided, and a concave step (21) matched with the convex step (13) is provided on the sealing gasket (2).
一种气门芯，包括：A valve core includes:

芯体(1)，所述芯体(1)具备通孔内腔,所述通孔内腔中形成气体通道，所述通孔内腔内设有配合孔(14)；A core body (1), the core body (1) is provided with a through-hole cavity, a gas channel is formed in the through-hole cavity, and a matching hole (14) is provided in the through-hole cavity;

芯杆(3)，所述芯杆(3)容纳在所述配合孔(14)中，所述芯杆(3)包括密封部(31)和限位部(32)，所述密封部(31)设置在配合孔(14)的外端，所述限位部(32)设置在所述芯体(1)的内部；所述配合孔(14)的径向尺寸小于所述通孔内腔远离所述密封部(31)的一端的径向尺寸及所述密封部(31)的径向尺寸；及The core rod (3), the core rod (3) is received in the matching hole (14), the core rod (3) includes a sealing portion (31) and a limiting portion (32), the sealing portion ( 31) is arranged at the outer end of the mating hole (14), the limiting portion (32) is arranged inside the core (1); the radial dimension of the mating hole (14) is smaller than that in the through hole The radial dimension of the end of the cavity away from the sealing portion (31) and the radial dimension of the sealing portion (31); and

密封件，所述密封件设置在所述芯体(1)的端部与所述芯杆(3)的密封部(31)之间；A seal, the seal is arranged between the end of the core (1) and the seal (31) of the core rod (3);

其中，所述芯杆(3)设置为在所述配合孔(14)内轴向活动以打开或关闭所述气体通道，所述芯杆(3)设置为当所述限位部(32)抵接于所述芯体(1)时处于第一位置，使所述气体通道处于打开状态，所述芯杆(3)还设置为当所述密封部(31)通过所述密封件抵压于所述芯体(1)时处于第二位置，使所述气体通道关闭。Wherein, the core rod (3) is configured to move axially in the matching hole (14) to open or close the gas passage, and the core rod (3) is configured to act as the limiting portion (32) When abutting on the core body (1), it is in the first position, so that the gas channel is in an open state, and the core rod (3) is also set to press against the sealing part (31) by the sealing element. When the core body (1) is in the second position, the gas passage is closed.
根据权利要求5所述的气门芯，其中，所述气体通道为所述芯杆(3)与所述配合孔(14)之间的间隙，所述气体通道包括进气口，所述限位部(32)设置为当所述芯杆(3)处于第一位置时，与所述配合孔(14)形成使体流通的所述进气口。The valve core according to claim 5, wherein the gas passage is a gap between the core rod (3) and the mating hole (14), the gas passage includes an air inlet, and the limit The part (32) is configured to form the air inlet for the body to circulate with the matching hole (14) when the core rod (3) is in the first position.
根据权利要求6所述的气门芯，其中，所述限位部(32)外周面为圆锥面，且所述圆锥面在远离所述密封部(31)的方向上逐渐向外扩张；The valve core according to claim 6, wherein the outer peripheral surface of the limiting portion (32) is a conical surface, and the conical surface gradually expands outward in a direction away from the sealing portion (31);

所述配合孔(14)靠近所述限位部(32)的一端的端口形状为多边形或椭圆形；或The port shape of the end of the matching hole (14) close to the limiting portion (32) is polygonal or elliptical; or

所述配合孔(14)靠近所述限位部(32)的一端或所述限位部(32)上开设有通气槽。One end of the matching hole (14) close to the limiting portion (32) or a ventilation groove is provided on the limiting portion (32).
根据权利要求5所述的气门芯，其中，所述芯体(1)或所述芯杆(3)上设置有连通孔，所述连通孔设置为连通所述芯杆(3)与所述配合孔(14)之间的间隙以及所述通孔内腔远离所述密封部(31)的一端，所述气体通道包括所述间隙和所述连通孔；The valve core according to claim 5, wherein the core body (1) or the core rod (3) is provided with a communicating hole, and the communicating hole is configured to communicate the core rod (3) with the The gap between the matching holes (14) and the end of the through hole inner cavity away from the sealing portion (31), and the gas passage includes the gap and the communicating hole;

或，所述芯杆(3)上设置有通气孔，所述气体通道为所述通气孔。Or, a vent hole is provided on the core rod (3), and the gas channel is the vent hole.
根据权利要求5所述的气门芯，其中，所述密封件为密封垫(2)，所述密封垫(2)套设于所述芯体(1)的一端，所述芯体(1)设置有所述密封垫(2)的一端设有凸台阶(13)，所述密封垫(2)上设有与所述凸台阶(13)配合的凹台阶(21)。The valve core according to claim 5, wherein the seal is a gasket (2), the gasket (2) is sleeved on one end of the core (1), and the core (1) A convex step (13) is provided at one end where the sealing gasket (2) is provided, and a concave step (21) matched with the convex step (13) is provided on the sealing gasket (2).
根据权利要求5所述的气门芯，其中，所述芯杆(3)远离所述密封件的一端沿周向间隔布设有多个卡爪(34)，所述卡爪(34)包括卡钩，所述卡爪(34)设置为当所述卡钩伸出所述配合孔(14)的一端时，沿所述配合孔(14)的径向收缩及回弹，以使得所述卡爪(34)能够贯穿所述配合孔(14)，并与所述芯体(1)卡合；所述卡钩形成所述限位部(32)，所述芯杆(3)包括设置于相邻两个所述卡爪(34)之间的通槽，所述通槽及所述芯杆(3)与所述芯体(1)之间的间隙形成所述气体通道。The valve core according to claim 5, wherein a plurality of claws (34) are arranged circumferentially at an end of the core rod (3) away from the sealing member, and the claws (34) comprise hooks , The claw (34) is set to shrink and rebound along the radial direction of the mating hole (14) when the hook extends out of one end of the mating hole (14), so that the claw (34) It can penetrate the mating hole (14) and be engaged with the core body (1); the hook forms the limiting portion (32), and the core rod (3) includes Adjacent to the through groove between the two jaws (34), the through groove and the gap between the core rod (3) and the core body (1) form the gas passage.
根据权利要求1或5所述的气门芯，其中，所述芯杆(3)的一端设有一盲孔(33)，所述限位部(32)为对所述芯杆(3)设有所述盲孔(33)的一端冲压或铆压扩口时形成的扩台。The valve core according to claim 1 or 5, wherein one end of the core rod (3) is provided with a blind hole (33), and the limiting portion (32) is provided with the core rod (3) The expansion platform is formed when one end of the blind hole (33) is punched or riveted and expanded.
根据权利要求1或5所述的气门芯，其中，所述芯体(1)远离所述密封部(31)的一端的外侧壁上设置有外螺纹，所述通孔内腔内还设有内六方孔(11)。The valve core according to claim 1 or 5, wherein an outer thread is provided on the outer side wall of the end of the core (1) away from the sealing portion (31), and the inner cavity of the through hole is also provided Inner hexagonal hole (11).
一种氮气弹簧，包括如权利要求1-12中任一项所述的气门芯。A nitrogen gas spring, comprising the valve core according to any one of claims 1-12.