An electronic ignition tube assembly tool

Abstract

An electronic ignition tube assembly tool, comprising a base, a movable piece, a spring and a pressure head, a containing groove for containing the shell is arranged on the base, the movable piece is displaceably through the containing groove, one end of the movable piece is located in the base below the containing groove, when the movable piece is displaced, the other end of the movable piece is located in the containing groove or extends out of the containing groove in the direction of the pressure head and is located above the base; one end of the spring is fixed on the base and the other end is connected with the movable piece outside the containing groove to form elastic support for the movable piece; the pressure head is arranged above the base and the movable piece corresponding to the movable piece; a pin groove for placing the PIN pin of the electronic ignition tube is arranged on the end face of the end of the movable piece towards the pressure head; the end of the pressure head towards the movable piece is arranged as an annular structure for pressing the outer side of the part containing gunpowder of the electronic ignition tube. The structure is simple, the electronic ignition tube and the shell are conveniently assembled, and the assembly safety is improved.

Description

Technical Field

[0001] This invention relates to the fields of power control and electric vehicles, and in particular to assembly fixtures for electronic ignition tubes in excitation devices in circuits. Background Technology

[0002] In addition to traditional thermal fuses, electric vehicle battery pack main circuit protection devices also include a rapid-breakout excitation device structure, and this excitation device structure is increasingly being used. The excitation device structure generally includes a housing and an electronic ignition tube, a cut-off structure, and a conductive plate assembled inside the housing. The conductive plate is typically connected in series in the main circuit. High-pressure gas released by the electronic ignition tube drives the cut-off structure to cut the conductive plate, thus quickly disconnecting the main circuit. This overcomes the shortcomings of traditional fuses, offering advantages such as low power consumption (low heat generation), small size, light weight, good resistance to current surges, and fast breaking time.

[0003] Electronic ignition tubes are insensitive propellant products. Because they contain insensitive propellant, they require special care during use. They must not be cut, disassembled, burned, or squeezed. Squeezing specifically refers to not squeezing the propellant-containing part, otherwise there is a risk of propellant explosion, malfunction of the electronic ignition tube, and safety risks during assembly. Due to the special nature of electronic ignition tubes, if the propellant part of the electronic ignition tube is squeezed during the assembly of the excitation device, it may cause the propellant to explode, posing a safety risk to the assembly operation. Therefore, the design of assembly tooling for electronic ignition tubes is particularly important. Summary of the Invention

[0004] The purpose of this invention is to provide an electronic ignition tube assembly fixture. With the assembly fixture, the electronic ignition tube can be safely and conveniently assembled into the housing, avoiding the risks of the electronic ignition tube being squeezed or burned during the assembly process, thus improving assembly safety.

[0005] To achieve the above objectives, the present invention provides an electronic ignition tube assembly fixture, comprising a base, a movable component, a spring, and a pressure head. A receiving groove for accommodating a housing is provided on the base. The movable component can be displaced through the receiving groove. One end of the movable component is located in the base below the receiving groove. When the movable component is displaced, the other end of the movable component is located in the receiving groove or extends out of the receiving groove towards the pressure head, positioned above the base. One end of the spring is fixed to the base, and the other end is connected to the movable component located outside the receiving groove, providing elastic support for the movable component. The pressure head is positioned above the base and the movable component, corresponding to the movable component. A pin groove for placing the PIN pin of the electronic ignition tube is provided on the end face of the movable component facing the pressure head. The end of the pressure head facing the movable component is configured as an annular structure for pressing the propellant-filled portion of the electronic ignition tube outside its outer edge.

[0006] Preferably, a cavity is formed on the base below the receiving groove, the cavity is connected to the bottom of the receiving groove and the outside of the base respectively, the movable member is displaceably disposed in the cavity, one end of the movable member is located in the cavity, and the other end passes through the receiving groove and is located above the base.

[0007] Preferably, the cavity communicates with the outside of the base, the spring is located on the outside of the base, one end of the spring is fixedly connected to the top of the base, and the other end passes through the outside of the base and is connected to one end of the movable part located in the cavity.

[0008] Preferably, the movable component has an inverted T-shaped structure, with one end of the horizontal feature located in the cavity and one end of the vertical feature passing through the receiving groove and located above the base; the spring is connected to one end of the horizontal feature.

[0009] Preferably, the upper end of the base where the accommodating groove is located is configured as a cross-shaped structure, and the accommodating groove is located at the center of the cross-shaped structure; the cavity is exposed at the four corners of the cross-shaped structure, and the upper end of the cavity extends to the cross-shaped structure below the accommodating groove; the spring is respectively provided at the four corners of the cross-shaped structure, one end of the spring is fixedly connected to the top of the cross-shaped structure, and the other end is fixedly connected to the movable part.

[0010] Preferably, the cavity is provided with a limiting structure that mates with one end of the horizontal feature of the movable component.

[0011] Preferably, the end face of the electronic ignition tube with the PIN pin is further provided with a limiting groove, and the side of the movable part with the pin groove is provided with a limiting protrusion corresponding to the limiting groove.

[0012] Preferably, the shape of the receiving groove matches the outer periphery shape of the end of the housing where the electronic ignition tube is mounted.

[0013] Preferably, a positioning structure is provided at the corresponding position where the housing contacts the receiving groove.

[0014] Preferably, positioning notches for defining the position of the base are provided on opposite sides of the bottom of the base.

[0015] The assembly fixture of this invention has a simple structure, is easy to operate, and ensures operational safety. The electronic ignition tube is a standard component available on the market with a relatively fixed structure, and the structure for assembling the electronic ignition tube into the housing is also relatively fixed. Therefore, this assembly fixture has strong versatility and can be applied to most situations where the housing is used to assemble the electronic ignition tube. This assembly fixture can work with the housing's positioning structure to prevent incorrect housing placement and avoid subsequent interface orientation errors, while also preventing housing rotation. The assembly fixture can be used for both manual and driven mechanism pressing, offering strong versatility. The assembly fixture can protect the ignition tube pins, preventing them from bending. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the electronic ignition tube structure.

[0017] Figure 2 This is a structural diagram of the electronic ignition tube from another angle.

[0018] Figure 3 This is a three-dimensional structural diagram of the electronic ignition tube assembly fixture.

[0019] Figure 4 This is a frontal sectional view of the electronic ignition tube assembly fixture.

[0020] Figure 5 This is a side sectional view of the electronic ignition tube assembly fixture.

[0021] Figure 6 This is a three-dimensional structural diagram showing the electronic ignition tube placed on the movable part and the pressure head pressing the electronic ignition tube before assembly.

[0022] Figure 7 yes Figure 6 A cross-sectional structural diagram.

[0023] Figure 8 This is a schematic diagram of the structure for pressing the electronic ignition tube into the housing.

[0024] Figure 9 This is a schematic diagram of the structure in which the movable part lifts up the housing with the assembled electronic ignition tube.

[0025] Figure 10 yes Figure 9 A schematic diagram of the three-dimensional structure.

[0026] Figure label: Housing A, electronic ignition tube 1, PIN needle 2, injection molding part 3, gunpowder filling part 4, limiting groove 5, inclined surface 6, base 10, moving part 11, spring 12, pressure head 13, receiving groove 14, cavity 15, needle groove 16, limiting protrusion 17, positioning notch 18. Detailed Implementation

[0027] The electronic ignition tube assembly fixture of the present invention includes a base, a movable component, a spring, and a pressure head. A receiving groove for accommodating a housing is provided on the base. The movable component can be displaced through the receiving groove. One end of the movable component is located in the base below the receiving groove. When the movable component is displaced, the other end of the movable component is located in the receiving groove or extends out of the receiving groove towards the pressure head, positioned above the base. One end of the spring is fixed to the base, and the other end is connected to the movable component located outside the receiving groove, providing elastic support for the movable component. The pressure head is positioned above the base and the movable component, corresponding to the movable component. A pin groove for placing the PIN needle of the electronic ignition tube is provided on the end face of the movable component facing the pressure head. The end of the pressure head facing the movable component is configured as an annular structure for pressing the propellant-filled portion of the electronic ignition tube outside its outer edge.

[0028] The following describes preferred embodiments in detail with reference to the accompanying drawings. The directional terms used are for reference only and do not constitute a limitation on the technical solution of this invention.

[0029] See Figure 1 and Figure 2 The electronic ignition tube 1 mainly consists of a PIN needle 2, an injection-molded part 3, and a propellant-filling part 4. The PIN needle 2 and the propellant-filling part 4 are located at opposite ends of the injection-molded part 3. The end face of the injection-molded part 3 facing the propellant-filling part 4 is beveled 6. A limiting groove 5 is provided on the end face where the PIN needle 2 is located; the limiting groove 5 may also be omitted.

[0030] The electronic ignition tube 1 is a standard selection component available on the market. The propellant loading section 4 must not be subjected to external pressure, otherwise there is a risk of ignition explosion. The PIN needle 2 is a round needle with a diameter of 1 mm, and it must also not be subjected to external pressure, otherwise it is easy to deform and bend, affecting its use. When the electronic ignition tube 1 is assembled into the housing A, external force needs to be applied to the electronic ignition tube 1. From the structure of the electronic ignition tube 1, the only place where external force can be applied is the injection molding section 3. For ease of application, the inclined surface of the injection molding section 3 near the propellant loading section 4 is selected as the contact surface for applying force.

[0031] Electronic ignition tube assembly fixture, see Figures 2 to 5 It mainly includes a base 10, a movable part 11, a spring 12, and a pressure head 13.

[0032] The base 10 is a block structure made of metal or plastic, preferably lightweight metal for easy handling. A receiving groove 14 for housing A is provided on the upper end face of the base 10. The shape of the receiving groove 14 matches the outer circumference of the end of housing A where the electronic ignition tube 1 is assembled, facilitating the close placement of housing A within the receiving groove 14. The receiving groove 14 positions housing A within it, preventing it from wobbling. To prevent incorrect placement of housing A, a positioning structure is provided at the corresponding contact point between housing A and the receiving groove 14. For example, a protruding ridge is provided on the side of housing A that contacts the receiving groove 14, and a groove is provided at the corresponding position in the receiving groove 14. Only when the protruding ridge of housing A is nested into the groove of the receiving groove 14 is the housing A positioned, preventing rotation of housing A relative to the receiving groove 14 and preventing incorrect placement of housing A.

[0033] A cavity 15 is also provided on the base 10, penetrating the bottom of the base 10. The cavity 15 is connected to the bottom of the receiving groove 14 through a through hole, and the receiving groove 14 and the cavity 15 connect the upper and lower ends of the base 10. Since the inner diameter of the cavity 15 is larger than the width of the through hole connecting to the bottom of the receiving groove 14, the cavity 15 is connected to the outer periphery of the base 10 through through holes.

[0034] The specific shape of the base can be Figure 1 The structure includes a base with a boss at the bottom. A cross-shaped structure is formed on the boss to create the upper part of the base. A receiving groove 14 is located at the center of the cross-shaped structure. A cavity 15 passes through the upper and lower ends of the boss and one end of the cross-shaped structure connected to the boss, exposing the outer periphery of the cavity 15 at the four corners of the cross-shaped structure, directly communicating with the outside of the base. This structural design reduces the weight of the base and avoids the need for through holes on the outside of the base to connect with the cavity 15.

[0035] The movable component 11 is in the shape of an inverted T and includes an integrally connected horizontal feature and a vertical feature. The movable component 11 is disposed in the cavity 15 in an inverted T shape. One end of the movable component 11 containing the horizontal feature is located in the cavity 15, and the vertical feature passes through the receiving groove 14. The movable component 11 can move linearly along the cavity 15 and is telescopic relative to the base. One end of the vertical feature can protrude from the base and be located above the base, or it can retract into the receiving groove 14 in the base. The end of the cavity 15 connected to the receiving groove 14 forms a limiting structure, which limits the position of the horizontal feature of the movable component 11 and limits the upward displacement distance of the movable component 11.

[0036] A spring 12 is disposed on the outer periphery of the base 10. Both ends of the spring 12 are hook-shaped. One end is fixed to the upper end of the base 10, and the other end passes through a through hole on the outer side of the base 10 and is fixedly connected to the bottom of the horizontal feature of the movable member 11. When the through hole on the base 10 allows for the displacement of the movable member 11, the end of the spring 12 connected to the movable member displaces at the through hole. The spring 12 provides elastic support for the movable member 11. To ensure uniform force distribution on the movable member 11, at least four springs 12 are symmetrically distributed on the outer periphery of the movable member 11. In the initial position of the movable member 11, i.e., when the movable member 11 is not subjected to the force of the pressure head 13, the spring 12 is in a stretched state, generating an upward elastic force on the movable member 11. This causes the horizontal feature of the movable member 11 to abut against the end of the cavity 15 that connects to the receiving groove 14. The end of the vertical feature of the movable member 11 not connected to the horizontal feature, i.e., the end facing the pressure head, extends out of the base and is located above the base. When the movable part 11 is subjected to downward pressure from the pressure head 13, the movable part 11 moves toward the interior of the base 10, further stretching the spring 12. When the force applied by the pressure head is lost, the movable part 11 returns to its original position under the elastic force of the spring 12.

[0037] When the upper end of the base 10 is configured as a cross-shaped structure, the springs 12 are distributed at the four corners of the cross-shaped structure. Since the upper end of the cavity 15 is connected to the four corners of the cross-shaped structure respectively, the lower end of the spring 12 is directly fixedly connected to the movable part 11 located in the cavity 15, and the upper end of the spring 12 is fixedly connected to the top of the cross-shaped structure. This makes the base structure more compact and does not occupy space outside the base.

[0038] A pressure head 13 is disposed above the base 10, the movable part 11, and the receiving groove 14. The pressure head 13 has a columnar structure and can be pressed down manually or connected to a drive mechanism (not shown). The drive mechanism drives the pressure head 13 to move linearly toward the movable part 11. The drive mechanism can be a cylinder or a linear displacement drive mechanism, such as a lead screw and nut. When the pressure head is pressed down manually, a bracket needs to be provided to position the pressure head displaceably on the bracket.

[0039] The end of the pressure head 13 facing the movable part 11 is provided with an annular structure, which matches the shape of the inclined surface 6 at the injection-molded part 3 on the outer periphery of the gunpowder-filling part 4 of the electronic ignition tube 1. When the pressure head 13 presses against the housing A, the pressure head 13 only presses against the inclined surface 6 at the injection-molded part 3 on the outer periphery of the gunpowder-filling part 4, and does not come into contact with the gunpowder-filling part 4. That is, the pressure head does not apply any force to the gunpowder-filling part 4.

[0040] A pin groove 16 is provided on the end face of the movable part 11 facing the pressure head 13, and a limiting protrusion 17 is provided on one side of the pin groove 16. The pin groove 16 is for the insertion of the PIN pin 2 of the electronic ignition tube 1, and the limiting protrusion 17 is for nesting into the limiting groove 5 of the electronic ignition tube 1. The electronic ignition tube 1 placed on the movable part 11 is positioned by the limiting groove 5 and the pin groove 16.

[0041] The base 10 extends outwards on both sides at its bottom to form a fixing part for fixing the base 10. Positioning notches 18 are provided at the fixing parts on opposite sides of the base 10. The base 10 can be locked onto the worktable by bolts, nuts and positioning notches 18, thus positioning the base 10.

[0042] For the assembly process, please refer to... Figures 6 to 10 First, place the housing A in the receiving groove 14 on the base 10, ensuring correct positioning. Then, insert the electronic ignition tube 1 downwards into the pin groove 16 of the movable part 11 facing the pressure head 13, with the pin needle 2 pointing downwards. The pin groove 16 protects the pin needle 2 from bending. The limiting protrusion 17 of the movable part 11 is then nested into the limiting groove 5 of the electronic ignition tube 1, achieving positioning of the electronic ignition tube 1. After the electronic ignition tube 1 is positioned, the pressure head 13 moves downwards to press against the injection-molded portion 3 on the outside of the propellant loading portion 4 of the electronic ignition tube 1. Positioning of the electronic ignition tube 1 is achieved through the movable part 11 and the pressure head 13. Then, the pressure head 13 applies a force F to the electronic ignition tube 1. (See...) Figure 6 The pressure head 13 presses the electronic ignition tube 1, driving the movable part 11 to move towards the base 10. Under the force F of the pressure head 13, the elastic force of the spring 12 is overcome, pushing the electronic ignition tube 1 and the movable part 11 downward towards the housing A. During the displacement of the electronic ignition tube 1, it gradually enters the cavity of the housing A and presses the electronic ignition tube 1 into the assembly position of the housing A. The assembly position of the ignition tube 1 and the housing A are tightly fitted to achieve the positioning of the electronic ignition tube 1. After the assembly is in place, the pressure head 13 stops moving. During the downward displacement and assembly of the electronic ignition tube into the housing A, the spring 12 is gradually stretched, and the spring force gradually increases. Then the pressure head 13 returns to its original position, and the electronic ignition tube loses its force. Under the elastic force of the spring 12, the movable part 11 moves upward towards the pressure head 13, lifting the housing A with the electronic ignition tube 1, which is already assembled in the receiving groove 14 of the base 10, from the base and placing it above the base. Then the assembled housing A is removed, completing the entire assembly process.

Claims

1. An electronic ignition tube assembly fixture, characterized in that, The device includes a base, a movable component, a spring, and a pressure head. The base has a receiving groove for accommodating the housing. The movable component can be displaced through the receiving groove. One end of the movable component is located in the base below the receiving groove. When the movable component is displaced, the other end is located in the receiving groove or extends out of the receiving groove towards the pressure head, positioned above the base. One end of the spring is fixed to the base, and the other end is connected to the movable component located outside the receiving groove, providing elastic support for the movable component. The pressure head is positioned above the base and the movable component, corresponding to the movable component. The end face of the movable component facing the pressure head has a needle groove for placing the PIN pin of the electronic ignition tube. The end of the pressure head facing the movable component is configured as an annular structure for pressing the propellant-filled portion of the electronic ignition tube outside its outer edge.

2. The electronic ignition tube assembly fixture according to claim 1, characterized in that, A cavity is provided on the base below the receiving groove. The cavity is connected to the bottom of the receiving groove and the outside of the base. The movable member is displaceably disposed in the cavity. One end of the movable member is located in the cavity, and the other end passes through the receiving groove and is located above the base.

3. The electronic ignition tube assembly fixture according to claim 2, characterized in that, The cavity is connected to the outside of the base. The spring is located on the outside of the base. One end of the spring is fixedly connected to the top of the base, and the other end passes through the outside of the base and is connected to one end of the movable part located in the cavity.

4. The electronic ignition tube assembly fixture according to claim 3, characterized in that, The movable component has an inverted T-shaped structure. One end of the horizontal feature of the movable component is located in the cavity, and one end of the vertical feature passes through the receiving groove and is located above the base. The spring is connected to one end of the horizontal feature.

5. The electronic ignition tube assembly fixture according to claim 4, characterized in that, The upper end of the base where the accommodating groove is located is configured as a cross-shaped structure, and the accommodating groove is located at the center of the cross-shaped structure; the cavity is exposed at the four corners of the cross-shaped structure, and the upper end of the cavity extends to the cross-shaped structure below the accommodating groove; the spring is respectively installed at the four corners of the cross-shaped structure, one end of the spring is fixedly connected to the top of the cross-shaped structure, and the other end is fixedly connected to the movable part.

6. The electronic ignition tube assembly fixture according to claim 4, characterized in that, The cavity is provided with a limiting structure that mates with one end of the horizontal feature of the movable part.

7. The electronic ignition tube assembly fixture according to claim 1, characterized in that, The electronic ignition tube is provided with a limiting groove on the end face of the PIN pin, and the movable part is provided with a limiting protrusion on the side of the pin groove corresponding to the limiting groove.

8. The electronic ignition tube assembly fixture according to claim 1, characterized in that, The shape of the receiving groove matches the outer periphery of the end of the housing where the electronic ignition tube is installed.

9. The electronic ignition tube assembly fixture according to claim 8, characterized in that, A positioning structure is provided at the corresponding position where the housing contacts the receiving groove.

10. The electronic ignition tube assembly fixture according to claim 1, characterized in that, Positioning notches for defining the position of the base are provided on opposite sides of the bottom of the base.

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