Inflation oil injection module

Abstract

The invention provides an inflation oil injection module. The inflation oil injection module comprises a reciprocating mechanism, a conveying channel, a vacuumizing mechanism, an inflation mechanism and a liquid injection mechanism, wherein the vacuumizing mechanism, the inflation mechanism and the liquid injection mechanism communicate with the conveying channel; the vacuumizing mechanism can maintain a negative pressure environment in the conveying channel; the inflation mechanism can provide gas for the conveying channel. The liquid injection mechanism can provide liquid for the conveying channel. One end of the reciprocating mechanism can stretch into a preset position in the conveying channel and can move along the conveying channel so as to provide conveying power for the gas or the liquid. The functions of vacuum pumping, air inflation and liquid injection are integrated into the same air inflation and oil injection module, process linkage is achieved by means of transmission cooperation of the press-fitting module and the module, a shock absorber does not need to be transferred among multiple devices, and pretreatment and core processes can be continuously completed on a carrier fixing station through the same conveying channel.

Description

TECHNICAL FIELD

[0001] The present application relates to an air injection module, in particular to an air injection module suitable for a shock absorber. BACKGROUND

[0002] As a core component of the automobile chassis system, the shock absorber directly determines the smoothness, stability and control safety of the vehicle during driving, and its performance is of great importance to the driving experience and the driving quality of the vehicle. In the production and manufacturing process of the shock absorber, the precise air injection and liquid injection processes completed in the interior of the shock absorber are the key links to ensure that the shock absorber meets the functional standards and has stable performance, and are indispensable. Among them, the air injection process mainly fills nitrogen into the interior of the shock absorber, uses the inertness and compressibility of nitrogen to effectively inhibit the foaming phenomenon of the oil in the interior of the shock absorber during operation, avoids air resistance, and adjusts the damping characteristics of the shock absorber to ensure that it can provide stable damping effect under different working conditions; the liquid injection process selectively injects ordinary damping oil or magnetorheological fluid according to the design function and application scene of the shock absorber. Specifically, ordinary damping oil relies on viscous damping to achieve basic damping effect and is suitable for conventional vehicles; magnetorheological fluid can adjust the damping coefficient in real time through the change of magnetic field strength to meet the precise control requirements of high-end vehicles on dynamic damping performance.

[0003] Therefore, in view of the above-mentioned air injection and liquid injection requirements of the shock absorber, it is necessary to propose further solutions. SUMMARY

[0004] The present application aims to provide an air injection module to overcome the deficiencies in the prior art.

[0005] The technical scheme of the present application is as follows: An air injection module for air injection and liquid injection of a shock absorber, comprising: a reciprocating mechanism, a conveying channel, and a vacuum pumping mechanism, an air injection mechanism and a liquid injection mechanism connected with the conveying channel; The vacuum pumping mechanism can maintain a negative pressure environment in the conveying channel; the air injection mechanism can provide gas to the conveying channel; the liquid injection mechanism can provide liquid to the conveying channel; one end of the reciprocating mechanism can extend into a preset position in the conveying channel and can move along the conveying channel to provide conveying power for the gas or liquid.

[0006] As an improvement of the air injection module of the present application, the conveying channel is axially through, the vacuum pumping mechanism, the air injection mechanism and the liquid injection mechanism are distributed on the outer peripheral side of the conveying channel; and when the reciprocating mechanism is in the preset position, the vacuum pumping mechanism, the air injection mechanism and the liquid injection mechanism are located below the reciprocating mechanism.

[0007] As an improvement of the air inflation oil injection module, the air inflation oil injection module further comprises a blocking mechanism; The blocking mechanism comprises a blocking pin capable of extending into the delivery channel and stopping the reciprocating unit at the preset position.

[0008] As an improvement of the air inflation oil injection module, the reciprocating mechanism comprises a first piston and a connecting rod, one end of the connecting rod is connected with the first piston, and the other end is connected with the pressing module; the first piston is capable of extending into the delivery channel.

[0009] As an improvement of the air inflation oil injection module, at least one sealing ring is further sleeved on the first piston; the gap between the first piston and the delivery channel is sealed by the sealing ring.

[0010] As an improvement of the air inflation oil injection module, the vacuumizing mechanism comprises a vacuum pump, the air inflation mechanism comprises an air pump, and the liquid injection mechanism comprises a liquid pump; the vacuum pump, the air pump and the liquid pump are respectively connected with the delivery channel through pipelines.

[0011] As an improvement of the air inflation oil injection module, the vacuumizing mechanism, the air inflation mechanism and the liquid injection mechanism each comprise a delivery cylinder, a second piston and a connector; The delivery cylinder is provided through one end of which the delivery channel is connected; the second piston is movably arranged in the delivery cylinder, and the connector is connected with the delivery cylinder and arranged close to one end of the delivery cylinder.

[0012] As an improvement of the air inflation oil injection module, the inner diameter of the delivery cylinder is larger than the inner diameter of the connector; the front end of the second piston has a protrusion which is capable of cooperating with the outlet of the delivery cylinder.

[0013] As an improvement of the air inflation oil injection module, the air inflation oil injection module further comprises a holding mechanism; The holding mechanism comprises a holding frame and a clamping unit; the delivery channel is arranged in the holding frame and coaxially arranged with the holding frame, and the holding frame is provided with an interface to connect the vacuumizing mechanism, the air inflation mechanism and the liquid injection mechanism with the delivery channel; the clamping unit comprises at least one set of clamping cylinders which are symmetrically distributed around the holding frame and exert radial clamping force on the holding frame.

[0014] As an improvement of the air inflation oil injection module, any of the clamping cylinders is provided with an abutting portion which exerts radial clamping force on the holding frame in cooperation with the piston of the clamping cylinder. Compared with the prior art, the air inflation oil injection module has the following beneficial effects: 1) This invention integrates vacuuming, inflation, and liquid injection functions into the same inflation and oil injection module, and achieves process linkage through the transmission cooperation between the press-fitting module and the module. This allows the shock absorber to complete pretreatment and core processes continuously on a fixed workstation of the carrier through the same conveying channel without having to be transferred between multiple devices. This not only eliminates repetitive operations in traditional production, shortens process intervals and production cycles, but also avoids positioning errors from multiple clamping, reduces rework costs, and simplifies equipment layout and manual operation.

[0015] 2) In this invention, the reciprocating mechanism is held in a preset position before inflation and liquid injection, which helps the reciprocating mechanism provide the required force. This is because the preset position corresponds to a fixed channel volume and pressure reference, thus ensuring that the initial state of the force output is consistent each time. This makes it easy to accurately match the required force by controlling the downward stroke, ensuring that the pressure is stable and controllable during inflation and liquid injection. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional schematic diagram of an air-filling and oil-injection module according to an embodiment of the present invention; Figure 2 for Figure 1 Cross-sectional view of the gas-filled oil injection module; Figure 3 This is a cross-sectional view of the blocking mechanism; Figure 4 This is a cross-sectional view of the vacuuming mechanism / gas filling mechanism / liquid injection mechanism. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figure 1 , 2 As shown, an embodiment of the present invention provides an air-filling and liquid-filling module for a shock absorber. The air-filling and liquid-filling module 21 of this embodiment includes: a reciprocating mechanism 211, a conveying channel 212, a vacuuming mechanism 213, an air-filling mechanism 214, and a liquid-filling mechanism 215.

[0020] The conveying channel 212 is axially provided, and the vacuumizing mechanism 213, the inflating mechanism 214 and the liquid injecting mechanism 215 are distributed at intervals on the outer circumferential side of the conveying channel 212. Correspondingly, a radial through opening 2121 is formed on the side wall of the conveying channel 212, so as to facilitate the communication between the conveying channel 212 and each mechanism.

[0021] Before the inflating and liquid injecting, when the reciprocating mechanism 211 is at the preset position, the vacuumizing mechanism 213, the inflating mechanism 214 and the liquid injecting mechanism 215 are located below the reciprocating mechanism 211. In this way, the reciprocating mechanism 211 is located above, and the vacuumizing, inflating and liquid injecting mechanisms 215 below directly abut against the conveying channel 212, so that when the reciprocating mechanism 211 is pressed downward, it can directly act on the medium in the channel, reduce the power transmission loss, and ensure that the action force accurately pushes the gas / liquid into the shock absorber. In addition, the various functional mechanisms are concentrated below the reciprocating mechanism 211, which facilitates the compact vertical layout with the conveying channel 212, shortens the gas / liquid conveying path, and reduces the medium residue in the channel.

[0022] As shown in FIG. 1, the inflating and oil injecting module 21 further comprises a reciprocating mechanism 211. The reciprocating mechanism 211 is arranged on the outer circumferential side of the conveying channel 212, and is connected with the vacuumizing mechanism 213, the inflating mechanism 214 and the liquid injecting mechanism 215. Figure 3 As shown in FIG. 1, in order to cooperate with the reciprocating mechanism 211 to be able to stay at the preset position, the inflating and oil injecting module 21 further comprises a blocking mechanism 216. The blocking mechanism 216 comprises a blocking pin 2161, which can extend into the conveying channel 212 and make the reciprocating unit stay at the preset position. In one embodiment, the blocking pin 2161 is located in a guide cylinder 2162, one end of which is connected with the conveying channel 212, so as to facilitate the blocking pin 2161 to extend into the conveying channel 212 along the guide cylinder 2162. In one embodiment, the blocking pin 2161 can be a pneumatic blocking pin 2161.

[0023] In this embodiment, the reciprocating mechanism 211 comprises a first piston 2111 and a connecting rod 2112. The first piston 2111 can extend into the conveying channel 212, and at least one sealing ring is further sleeved on the first piston 2111. One end of the connecting rod 2112 is connected with the first piston 2111. In this way, the first piston 2111 cooperates with the sealing ring to realize high gas tightness in the channel, avoiding leakage of the medium during vacuumizing, inflating and liquid injecting. At the same time, the connecting rod 2112 as a rigid connecting piece can stably transmit the power of the pressing module to the piston, ensuring that the action force is efficiently converted into the medium pushing force.

[0024] The other end of the connecting rod 2112 is in transmission connection with the pressing module. Thus, when the pressing module drives the connecting rod 2112 to move downward, the first piston 2111 moves downward along the conveying channel 212 synchronously, compresses the gas or liquid in the channel, forms a pushing pressure, and completes the inflating or liquid injecting.

[0025] As described above, the vacuum-pumping mechanism 213, the air-filling mechanism 214 and the liquid-injecting mechanism 215 can adopt a vacuum pump, an air pump and a liquid pump. Alternatively, they can adopt an air-pumping cylinder, an air-filling cylinder and a liquid-injecting cylinder.

[0026] As shown in FIG. 6, when the air-pumping cylinder, the air-filling cylinder and the liquid-injecting cylinder are adopted, the vacuum-pumping mechanism 213, the air-filling mechanism 214 and the liquid-injecting mechanism 215 can adopt similar structures. Specifically, the vacuum-pumping mechanism 213, the air-filling mechanism 214 and the liquid-injecting mechanism 215 each include a delivery cylinder 2131, a second piston 2132 and a connector 2133. Figure 4

[0027] The delivery cylinder 2131 is throughly arranged, with one end thereof being in communication with the delivery channel 212. The second piston 2132 is movably arranged in the delivery cylinder 2131. The connector 2133 is in communication with the delivery cylinder 2131 and is arranged close to one end of the delivery cylinder 2131.

[0028] In this way, the three mechanisms adopt similar basic structures, can share parts and reduce the development investment of molds and tooling. More importantly, the delivery cylinder 2131 provides stable linear motion guidance for the second piston 2132, and the piston can accurately control the suction / exhaust volume of the medium in the cylinder through reciprocating motion. The connector 2133 is arranged close to the end, shortens the path of the medium from the cylinder to the delivery channel 212, reduces residue and improves the parameter accuracy of vacuum pumping, air filling and liquid injection.

[0029] In order to further improve the accuracy of air filling and liquid injection, the inner diameter of the delivery cylinder 2131 is greater than the inner diameter of the connector 2133. In this way, after the medium enters from the inlet, it can be evenly distributed to different areas of the delivery cylinder 2131 through the bifurcated flow channel. Meanwhile, the increase of the flow channel cross section from the connector 2133 to the delivery cylinder 2131 can reduce fluid resistance, avoid local turbulence and ensure the uniformity of liquid injection flow and pressure.

[0030] In addition, the front end of the second piston 2132 has a protrusion 2134 which can cooperate with the outlet 2135 of the delivery cylinder 2131. In this way, when the second piston 2132 moves to a specific position, the front end protrusion 2134 can tightly cooperate with the structure at the outlet 2135 to form an additional sealing barrier, further preventing leakage and improving sealing reliability. Especially in a high-pressure environment, it can effectively prevent the medium from seeping out of the outlet 2135.

[0031] In addition, the cooperation degree of the protrusion 2134 and the outlet 2135 can realize fine adjustment of the liquid injection flow. For example, during the movement of the second piston 2132, the protrusion 2134 gradually opens or closes the outlet 2135, thereby controlling the outflow speed and flow size of the medium, meeting the accurate demand for flow under different liquid injection conditions.

[0032] Again as​Figure 1 As shown, in order to keep the inflation and oil injection module 21 stable, the inflation and oil injection module 21 further comprises a holding mechanism 217 capable of exerting a holding force on the inflation and oil injection module 21 in the radial direction, thereby avoiding the shaking of the inflation and oil injection module 21, making the medium conveying path and pressure control of the vacuumizing, inflation, and liquid injection processes more accurate, and thus improving the process precision of the shock absorber inflation and liquid injection.

[0033] Specifically, the holding mechanism 217 comprises a holding frame 2171 and a clamping unit 2172. The conveying channel 212 is located in the holding frame 2171 and is coaxially arranged with the holding frame 2171. Correspondingly, the holding frame 2171 is provided with an interface to enable the vacuumizing mechanism 213, the inflation mechanism 214, and the liquid injection mechanism 215 to communicate with the conveying channel 212 through the interface. The clamping unit 2172 comprises at least one set of clamping cylinders, which are symmetrically distributed around the holding frame 2171 and exert a radial clamping force on the holding frame 2171.

[0034] In order to further improve the stability of the inflation and oil injection module 21, any clamping cylinder is provided with an abutting portion 2173, which exerts a radial clamping force on the holding frame 2171 in cooperation with the piston of the clamping cylinder. In one embodiment, the abutting portion 2173 is L-shaped and integrally extends from the clamping cylinder. In this way, the abutting portion 2173 and the piston form an upward and downward clamping, exerting force on the holding frame 2171 from different radial heights, avoiding local force deviation caused by single-point clamping, making the force on the holding frame 2171 uniform, and further suppressing the shaking of the inflation and oil injection module 21.

[0035] It is apparent for those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and the present application can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and not limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and range of equivalency of the elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the corresponding parts of the specification.

[0036] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. An inflation and oil filling die set for inflating and filling a shock absorber, characterized by, The inflation and oil injection module comprises a reciprocating mechanism, a conveying channel, a vacuumizing mechanism, an inflation mechanism and an oil injection mechanism connected with the conveying channel; The vacuumizing mechanism can maintain a negative pressure environment in the conveying channel; the inflation mechanism can provide gas to the conveying channel; the oil injection mechanism can provide liquid to the conveying channel; one end of the reciprocating mechanism can extend into a preset position in the conveying channel and move along the conveying channel to provide conveying power of the gas or liquid.

2. The air injection oiling die set of claim 1, wherein, The conveying channel is axially arranged through, the vacuumizing mechanism, the inflation mechanism and the oil injection mechanism are distributed on the outer circumferential side of the conveying channel; and when the reciprocating mechanism is in the preset position, the vacuumizing mechanism, the inflation mechanism and the oil injection mechanism are located below the reciprocating mechanism.

3. The gas injection and oiling module according to claim 1 or 2, characterized in that The inflation and oil injection module further comprises a blocking mechanism. The blocking mechanism comprises a blocking pin which can extend into the conveying channel and make the reciprocating unit stay in the preset position.

4. The air injection oiling die set of claim 1, wherein, The reciprocating mechanism comprises a first piston and a connecting rod; one end of the connecting rod is connected with the first piston and the other end is drivingly connected with the press fitting module; the first piston can extend into the conveying channel.

5. The air injection oiling die set of claim 4, wherein, At least one sealing ring is further sleeved on the first piston; the gap between the first piston and the conveying channel is sealed by the sealing ring.

6. The air injection oiling die set of claim 1, wherein, The vacuumizing mechanism comprises a vacuum pump, the inflation mechanism is a gas pump and the oil injection mechanism is a liquid pump; the vacuum pump, the gas pump and the liquid pump are respectively connected with the conveying channel through pipelines.

7. The air injection module of claim 1, wherein, The vacuumizing mechanism, the inflation mechanism and the oil injection mechanism each comprise a conveying cylinder, a second piston and a connector; The conveying cylinder is arranged through and one end thereof is connected with the conveying channel; the second piston is movably arranged in the conveying cylinder; and the connector is connected with the conveying cylinder and arranged close to one end of the conveying cylinder.

8. The air injection oiling die set of claim 7, wherein, The inner diameter of the conveying cylinder is greater than the inner diameter of the connector; the front end of the second piston has a protrusion which can cooperate with the outlet of the conveying cylinder.

9. The air injection oiling die set of claim 1, wherein, The inflation and oil injection module further comprises a holding mechanism; The holding mechanism comprises a holding frame and a clamping unit; the conveying channel is arranged in the holding frame and coaxially arranged with the holding frame; the holding frame is provided with an interface to make the vacuumizing mechanism, the inflation mechanism and the oil injection mechanism connected with the conveying channel; the clamping unit comprises at least one set of clamping cylinders which are symmetrically distributed around the holding frame and exert radial clamping force on the holding frame.

10. The air injection oiling die set of claim 9, wherein, A contact portion is arranged on any clamping cylinder and exerts radial clamping force on the holding frame in cooperation with the piston of the clamping cylinder.

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