Push rod type quick triggering device

Abstract

The utility model relates to a push rod type quick trigger device, which comprises an outer sleeve, an inner push rod and a gas generator, the inner push rod is movably arranged in an inner hole of the outer sleeve, the inner push rod is provided with a first sealing structure in sealing contact with the inner hole wall of the outer sleeve, and the first sealing structure synchronously moves along with the inner push rod. The outer sleeve is provided with a discharge hole communicated with an inner hole of the outer sleeve, the portion, located on the rear end side of the inner push rod, of the inner hole of the outer sleeve is an inflation cavity, the outer sleeve is further provided with a limiting blocking part, the gas generator is connected with the outer sleeve, and the gas generator can generate high-pressure gas which enters the inflation cavity. High-pressure gas in the inflation cavity can push the inner push rod to move forwards, and the inner push rod can move forwards to abut against the limiting blocking part and stop moving; when the inner push rod abuts against the limiting blocking part, the discharge hole is located on the front side of the first sealing structure, and the inner push rod can move backwards till the first sealing structure is located on the rear side of the discharge hole.

Description

TECHNICAL FIELD

[0001] The utility model relates to trigger device technical field, concretely relates to a push rod type quick trigger device. BACKGROUND

[0002] Trigger device as a kind of key action execution unit, it has wide application in industrial safety, emergency protection and automation control etc., its core function is to activate associated system to realize preset operation by mechanical action quickly.The trigger device represented by electric actuator pusher, usually by electric signal driving source (such as motor, electromagnetic assembly), transmission mechanism and execution component are constituted, and trigger action is completed by electric energy-mechanical energy conversion driving execution piece.The electric actuator pusher in prior art mainly uses the following design form: linear motor type pusher directly drives linear motion by electromagnetic field, rotary motor+transmission mechanism type pusher relies on screw, gear and so on to convert rotary motion into linear displacement, electromagnetic type pusher utilizes electromagnetic force instantaneous drive armature, and electric hydraulic pusher combines electric control and hydraulic system output high thrust.

[0003] However, the above-mentioned conventional design has certain limitation in response speed, for example: power source (such as motor, electromagnetic coil) from receiving signal to complete start-up exists inertia delay;Transmission mechanism (such as screw, gear set) because of mechanical contact friction, transmission chain is longer and leads to energy loss and movement lag;Execution piece from static acceleration to target position needs to overcome system inertia and damping effect.Such delay accumulation leads to overall trigger time difficult to compress, difficult to meet the instantaneous action demand in extreme scene, for example, in explosion suppression device, need in the initial stage of explosion (usually less than 10 milliseconds) trigger release mechanism, quickly inject high-pressure inert gas and target explosion inhibitor to suppress deflagration reaction.Existing electric actuator pusher is easy to miss the best explosion suppression time window due to response delay, leading to protection failure. UTILITY MODEL CONTENT

[0004] In view of the above-mentioned shortcomings of prior art, the technical problem to be solved by the utility model is to provide a push rod type quick trigger device, trigger action is rapid, and work is stable and reliable.

[0005] To achieve the above object, the utility model provides a push rod formula quick trigger device, including outer sleeve, inner push rod and gas generator, the inner push rod is movably arranged in the inner hole of outer sleeve, is equipped with the first sealing structure with the outer sleeve inner hole wall sealed contact on the inner push rod, and the first sealing structure moves synchronously with the inner push rod, be equipped with the bleed hole with its inner hole intercommunication on the outer sleeve, the inner hole of outer sleeve is located in the inner push rod rear end side portion and is the inflation chamber, the outer sleeve still is equipped with the limit stop, the gas generator is connected with the outer sleeve, and the gas generator can produce high pressure gas and enter into the inflation chamber, the high pressure gas in the inflation chamber can push the inner push rod and move to the front, and the inner push rod can move to the front to the limit stop and stop movement with resistance;When the inner push rod and limit stop resistance, the bleed hole is located in the first sealing structure front side, and the inner push rod can move to the rear to the first sealing structure and be located in the bleed hole rear side.

[0006] Further, the first sealing structure includes a first sealing ring fitted on the inner push rod.

[0007] Further, the inner push rod is provided with an annular groove on the outer circumferential surface, and the first sealing ring is embedded in the annular groove.

[0008] Further, a second sealing ring is fitted on the inner push rod and is in sealing contact with the inner hole wall of the inner push rod, and the second sealing ring moves synchronously with the inner push rod, the second sealing ring is located in front of the first sealing ring, and the inner push rod can move backward to the bleed hole between the first sealing ring and the second sealing ring.

[0009] Further, the inner hole of the outer sleeve includes a rear hole section and a front hole section connected together, the cross section of the rear hole section is larger than that of the front hole section, and a step surface formed between the rear hole section and the front hole section constitutes the limit stop, the bleed hole is arranged at the rear hole section, the inner push rod includes a rear rod section and a front rod section, the rear rod section is located in the rear hole section, and the first sealing structure is arranged on the rear rod section, the front rod section passes through the front hole section, and the rear rod section can abut against the limit stop when moving forward.

[0010] Further, the rear hole section and the front hole section are both cylindrical and coaxially arranged, and the rear rod section and the front rod section are both cylindrical and coaxially arranged.

[0011] Further, the front rod section is in clearance fit with the front hole section.

[0012] Further, the outer circumferential surface of the outer sleeve is provided with an outer thread section near the rear end region.

[0013] Further, the gas generator has a connecting portion connected with the rear end of the outer sleeve, and the connecting portion is provided with an outer thread.

[0014] The utility model relates to a push rod type quick trigger device which has the following beneficial effects:

[0015] By setting the outer sleeve, inner push rod and gas generator, high pressure gas is rapidly generated by the gas generator after receiving the signal, and the inner push rod generates a large thrust to directly push the inner push rod to move forward rapidly, so that the trigger action can be performed in a very short time, and at the same time, by setting the limiting stop, the first sealing structure and the relief hole, the limiting stop is used to stop the forward movement of the inner push rod, and the residual high pressure gas in the outer sleeve is discharged through the relief hole, so that the inner push rod is not pushed out due to excessive pressure in the inflation cavity of the outer sleeve, and the inner push rod can be stably stopped. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view of the push rod type quick trigger device embodiment one of the utility model.

[0017] Figure 2 It is a structural schematic view of the push rod type quick trigger device embodiment two of the utility model.

[0018] REFERENCE SIGNS

[0019] 1 outer sleeve

[0020] 11 relief hole

[0021] 12 inflation cavity

[0022] 13 limiting stop

[0023] 14 front hole

[0024] 15 rear hole

[0025] 16 outer thread section

[0026] 2 inner push rod

[0027] 21 front rod section

[0028] 22 rear rod section

[0029] 23 annular groove

[0030] 3 first sealing ring

[0031] 4 gas generator

[0032] 41 connecting part

[0033] 5 second sealing ring

[0034] 6. Sealing ring Detailed Implementation

[0035] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0036] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed herein. Furthermore, terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0037] See Figures 1 to 2 This utility model provides a push rod type quick triggering device, including an outer sleeve 1, an inner push rod 2, and a gas generator 4. The inner push rod 2 is movably disposed in the inner hole of the outer sleeve 1. The inner push rod 2 is provided with a first sealing structure that seals against the inner hole wall of the outer sleeve 1, and the first sealing structure moves synchronously with the inner push rod 2. The outer sleeve 1 is provided with a vent hole 11 that communicates with its inner hole. The portion of the inner hole of the outer sleeve 1 located at the rear end of the inner push rod 2 is an inflation chamber 12. The outer sleeve 1 is also provided with a limiting stop 13. The gas generator 4 is connected to the outer sleeve 1. When the gas generator 4 receives an electrical signal, it can generate high-pressure gas and enter the inflation chamber 12. The high-pressure gas in the inflation chamber 12 can push the inner push rod 2 forward, and the inner push rod 2 can move forward until it abuts against the limiting stop 13 and stops moving. When the inner push rod 2 abuts against the limiting stop 13, the vent hole 11 is located in front of the first sealing structure, and the inner push rod 2 can move backward until the first sealing structure is located behind the vent hole 11.

[0038] The main working principle of the push-rod type quick-trigger device involved in this utility model is as follows: See Figure 1 and Figure 2Before triggering, the inner push rod 2 is in the retracted state, that is, the rear end of the inner push rod 2 is close to the rear end of the outer sleeve 1. At this time, the first sealing structure is located behind the vent hole 11. The gas generator 4 preferably adopts the electrical signal triggering type. When receiving an electrical signal, it quickly generates high-pressure gas. The high-pressure gas enters the inflation chamber 12 inside the outer sleeve 1. Since the inner push rod 2 and the outer sleeve 1 are sealed by the first sealing structure, the inflation chamber 12 is a closed space. The high-pressure gas can quickly generate a huge thrust, thereby pushing the inner push rod 2 forward to perform the triggering action until the inner push rod 2 stops against the limit stop 13. At this time, the vent hole 11 is located in front of the first sealing structure. That is, the inflation chamber 12 is connected to the vent hole 11. The high-pressure gas in it will be released through the vent hole 11 to prevent the pressure in the inflation chamber 12 from being too high and pushing out the inner push rod 2, thus ensuring the safety of the push rod type quick triggering device. The gas generator 4 can adopt an existing mature design structure. After receiving an electrical signal, it can generate high-pressure gas very quickly. For example, the gas generator 4 in a car airbag works by using electrical energy to trigger a chemical reaction, which rapidly generates a large amount of gas and forms high pressure. The specific structure and principle of the gas generator 4 will not be described in detail.

[0039] See Figures 1 to 2 The present invention will be further described below with reference to several specific embodiments:

[0040] Example 1:

[0041] See Figure 1 In this embodiment, as a preferred design, the first sealing structure includes a first sealing ring 3 sleeved on the inner push rod 2. The number of first sealing rings 3 can be one or more, and an annular groove 23 is provided on the outer circumferential surface of the inner push rod 2. The first sealing ring 3 is embedded in the annular groove 23, thereby improving the stability of the installation and operation of the first sealing ring 3.

[0042] See Figure 1As a preferred design, the inner hole of the outer sleeve 1 includes a connected rear section hole 15 and a front section hole 14. The cross-section of the rear section hole 15 is larger than that of the front section hole 14, and the stepped surface formed between the rear section hole 15 and the front section hole 14 constitutes a limiting stop 13. Preferably, both the rear section hole 15 and the front section hole 14 are cylindrical and coaxially arranged, and the vent hole 11 is located at the rear section hole 15. The inner push rod 2 includes a rear rod section 22 and a front rod section 21. Correspondingly, both the rear rod section 22 and the front rod section 21 are also cylindrical and coaxially arranged, and the radius of the rear rod section 22 is larger than that of the front rod section 21. The rear rod section 22 is located in the rear section hole 15, and the first sealing structure is provided on the rear rod section 22. The front rod section 21 passes through the front section hole 14 and is used to perform the triggering action. When the rear rod section 22 moves forward, it can abut against the limiting stop 13, and the front rod section 21 has a clearance fit with the front section hole 14, which plays a sliding guiding role. The above design makes the axial movement of the inner push rod 2 in the outer sleeve 1 more stable and reliable, and also makes the inner push rod 2 more stable and stop when moving forward.

[0043] In this embodiment, see Figure 1 As a preferred design, the outer circumference of the outer sleeve 1 has an external thread section 16 near the rear end, facilitating stable installation of the outer sleeve 1 in the device to be triggered. The gas generator 4 has a connecting part 41 that connects to the rear end of the outer sleeve 1. The connecting part 41 has an air outlet that communicates with the inflation chamber 12 at the rear end of the outer sleeve 1. The connecting part 41 has external threads, and during use, the gas generator 4 is also fixed in the device to be triggered via a threaded connection, ensuring the stability of the entire push rod type quick triggering device. A sealing ring 6 is provided at the air outlet of the gas generator 4 and the rear end of the outer sleeve 1 to ensure the sealing of the connection between the two.

[0044] Example 2:

[0045] See Figure 2This embodiment is basically the same as Embodiment 1, except that a second sealing ring 5 is also fitted on the inner push rod 2 to seal against the inner wall of the inner hole of the inner push rod 2. The second sealing ring 5 is also embedded in the annular groove and moves synchronously with the inner push rod 2. The second sealing ring 5 is located in front of the first sealing ring 3, and the inner push rod 2 can move backward until the vent hole 11 is located between the first sealing ring 3 and the second sealing ring 5. The push rod type quick triggering device designed in this way can be well used for triggering in high-pressure gas environments, that is, the front end of the outer sleeve 1 is located in the gas environment. When the inner push rod 2 is in the retracted state, that is, when the rear end of the inner push rod 2 is close to the rear end of the outer sleeve 1, since the vent hole 11 is located between the first sealing ring 3 and the second sealing ring 5, the inner push rod 2 and the outer sleeve 1 are sealed by the second sealing ring 5 before the vent hole 11. The high-pressure gas in the working environment will not leak out through the gap between the inner push rod 2 and the outer sleeve 1, or through the vent hole 11. Of course, a second sealing ring 5 cannot be provided. During use, the vent hole 11 can be located in the working environment. In this way, the high-pressure gas in the working environment will flow back into the working environment through the gap between the inner push rod 2 and the outer sleeve 1, as well as through the vent hole 11, without any leakage to the outside. The rest of this embodiment is the same as that in the previous embodiment, so it will not be described again.

[0046] As can be seen from the above, the push-rod type quick-trigger device of this utility model has the following beneficial effects:

[0047] By configuring an outer sleeve 1, an inner push rod 2, and a gas generator 4, the gas generator 4 rapidly generates high-pressure gas upon receiving a signal, generating a large thrust on the inner push rod 2 to directly push it forward rapidly. This allows for triggering the action in a very short time. Simultaneously, by incorporating a limiting stop 13, a first sealing structure, and a vent hole 11, the limiting stop 13 stops the forward movement of the inner push rod 2, and the vent hole 11 releases any residual high-pressure gas inside the outer sleeve 1, preventing excessive pressure in the inflation chamber 12 of the outer sleeve 1 from pushing the inner push rod 2 out and ensuring its stable stop. Therefore, the push rod-type rapid triggering device, through the pressure generated by the gas generator 4, can very quickly and directly push the inner push rod 2, thereby greatly shortening the reaction time and ensuring stable and safe operation after triggering.

[0048] In summary, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0049] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A push-rod type quick-trigger device, characterized in that: The device includes an outer sleeve (1), an inner push rod (2), and a gas generator (4). The inner push rod (2) is movably disposed in the inner hole of the outer sleeve (1). The inner push rod (2) is provided with a first sealing structure that seals against the inner wall of the outer sleeve (1), and the first sealing structure moves synchronously with the inner push rod (2). The outer sleeve (1) is provided with a vent hole (11) that communicates with its inner hole. The portion of the inner hole of the outer sleeve (1) located at the rear end of the inner push rod (2) is an inflation chamber (12). The outer sleeve (1) is also provided with a limiting stop (13). The gas generator (4) is connected to the outer sleeve (1), and the gas generator (4) can generate high-pressure gas and enter the inflation chamber (12). The high-pressure gas in the inflation chamber (12) can push the inner push rod (2) to move forward, and the inner push rod (2) can move forward until it abuts against the limiting stop (13) and stops moving. When the inner push rod (2) abuts against the limiting stop (13), the vent hole (11) is located in front of the first sealing structure, and the inner push rod (2) can move backward until the first sealing structure is located behind the vent hole (11).

2. The push-rod type quick-trigger device according to claim 1, characterized in that: The first sealing structure includes a first sealing ring (3) sleeved on the inner push rod (2).

3. The push-rod type quick-trigger device according to claim 2, characterized in that: The inner push rod (2) has an annular groove (23) on its outer circumferential surface, and the first sealing ring (3) is embedded in the annular groove (23).

4. The push-rod type quick-trigger device according to claim 3, characterized in that: The inner push rod (2) is fitted with a second sealing ring (5) that is in sealing contact with the inner hole wall of the inner push rod (2), and the second sealing ring (5) moves synchronously with the inner push rod (2). The second sealing ring (5) is located in front of the first sealing ring (3), and the inner push rod (2) can move backward until the vent hole (11) is located between the first sealing ring (3) and the second sealing ring (5).

5. The push-rod type quick-trigger device according to claim 1, characterized in that: The inner hole of the outer sleeve (1) includes a connected rear section hole (15) and a front section hole (14). The cross-section of the rear section hole (15) is larger than that of the front section hole (14), and the stepped surface formed between the rear section hole (15) and the front section hole (14) constitutes a limiting stop (13). The vent hole (11) is located at the rear section hole (15). The inner push rod (2) includes a rear rod section (22) and a front rod section (21). The rear rod section (22) is located in the rear section hole (15), and the first sealing structure is provided on the rear rod section (22). The front rod section (21) passes through the front section hole (14). When the rear rod section (22) moves forward, it can abut against the limiting stop (13).

6. The push-rod type quick-trigger device according to claim 5, characterized in that: The rear section hole (15) and the front section hole (14) are both cylindrical and coaxially arranged, and the rear rod section (22) and the front rod section (21) are both cylindrical and coaxially arranged.

7. The push-rod type quick-trigger device according to claim 5, characterized in that: The front rod section (21) is clearance-fitted with the front section hole (14).

8. The push-rod type quick-trigger device according to claim 1, characterized in that: The outer circumferential surface of the outer sleeve (1) is provided with an external thread section (16) near the rear end area.

9. The push-rod type quick-trigger device according to claim 1, characterized in that: The gas generator (4) has a connecting part (41) that is connected to the rear end of the outer sleeve (1), and the connecting part (41) is provided with external threads.

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