A device and method for preventing loosening of the pressure point of an electrode assembly

Abstract

This invention provides a device and method for preventing loosening of electrode pin assembly pressure points, including a positioning fixture assembly, an automatic pressing assembly, and an electric pressing assembly. The positioning fixture assembly is fixed on the electric pressing assembly, and a fitted electrode pin assembly is vertically fixed on it, with a lateral thrust member arranged circumferentially around the electrode pin assembly. The automatic pressing assembly is located above the positioning fixture assembly and vertically presses the electrode pin assembly, pressing the electrode pin sleeve onto the electrode pin in place. The electric pressing assembly provides thrust to the thrust member, implementing pressure on the electrode pin assembly. This invention provides four-way evenly distributed pressure points to prevent loosening of the electrode pin assembly, with minimal deformation and consistent depth of the pressure points, without affecting the insertion performance of the electrode pin assembly, and solving the problem of easy separation between the electrode pin and the electrode pin sleeve.

Description

Technical Field

[0001] This invention belongs to the field of anti-loosening technology for small fitting and plugging structures, and specifically relates to an anti-loosening device and method for electrode assembly pressure points. Background Technology

[0002] The electrode assembly is a crucial component of pyrotechnic devices such as impact detonators, electric detonators, and impact igniters. It consists of a electrode and an electrode sleeve tightly pressed together. The electrode assembly serves as a plug-in connection; after repeated plugging, the electrode and electrode sleeve are prone to relative movement or even separation, affecting the assembly and performance of the pyrotechnic device. To ensure a secure connection between the electrode assembly and the electrode sleeve without affecting normal plugging, pressure points must be applied at the mating points of the electrode and electrode sleeve to prevent loosening.

[0003] Chinese Patent 202110040567.1 discloses a riveting machine for cable guide tube joint assemblies, equipped with a rotary feeding device for the guide tube joint assembly, which drives the guide tube joint assembly to rotate and move forward during riveting. The riveting device includes a support plate, a riveting cylinder, a sliding bracket, and riveting wheels. The two riveting wheels are symmetrically arranged about the axis of the guide tube joint assembly, and rotate and rivet the end of the guide tube joint assembly. The rotary riveting is completed gradually during the forward movement of the guide tube joint assembly, without damaging the end of the guide tube joint assembly.

[0004] Chinese Patent 202211142648.3 describes a riveting die and a riveting machine that use upper and lower dies to rivet wires into the cavity of a tubular shell. As the upper die approaches the lower die, the upper positioning block first contacts the tubular shell set on the lower riveting head, and then the upper riveting head contacts the tubular shell. This avoids the problems of uneven riveting point depth and deformation of the tubular shell during the riveting process.

[0005] The above-mentioned riveting methods are applicable to the riveting of solid connectors and allow for a relatively large range of deformation. However, they are not suitable for preventing loosening of small-scale mating and plug-in structures. Electrical pyrotechnics have high requirements for preventing loosening of small plug-in connections. If the riveting deformation is large or the depth is uneven, it can easily damage the appearance of the electrode assembly, affecting its plug-in performance and the electrical performance of the pyrotechnics. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, the inventors have conducted intensive research and provided a device and method for preventing loosening of electrode assembly pressure points. The device features pressure points evenly distributed in four directions to prevent loosening, which is suitable for preventing loosening of small fitting and plugging structures. The pressure points have small deformation and consistent depth, which does not affect the plugging performance of the electrode assembly and solves the problem of easy separation between the electrode and the electrode sleeve.

[0007] The technical solution provided by this invention is as follows:

[0008] In a first aspect, a probe assembly anti-loosening device includes a positioning fixture assembly, an automatic pressing assembly, and an electric pressing assembly; the positioning fixture assembly is fixed on the electric pressing assembly, and a fitted probe assembly is vertically fixed thereon, with a lateral thrust member arranged circumferentially on the probe assembly; the automatic pressing assembly is located above the positioning fixture assembly and vertically presses the probe assembly, pressing the probe onto the probe assembly in place; the electric pressing assembly provides thrust to the thrust member to perform point pressing on the probe assembly.

[0009] Furthermore, the positioning fixture assembly includes a base, a pressure pin, a spring, and a pressure plate. The upper section of the base has a vertically oriented through-hole at its center to hold the electrode needle, and four-way openings are evenly distributed on its sides to hold the pressure pin. The inner side of each side opening forms a through-hole that only allows the tip of the electrode needle to pass through. The lower section of the base is a cylindrical section for tight engagement with the electric pressure assembly. The pressure pin consists of a conical section and multiple cylindrical sections, with a central cylindrical section tightly engaging with the side openings of the base. The spring is fitted onto the conical section near the needle tip and the front cylindrical section of the pressure pin, with one end pressing against the front end of the side opening and the other end pressing against the front end face of the central cylindrical section. The pressure plate is fixed to the side of the base via a threaded connector, with its front end face abutting against the rear end face of the central cylindrical section of the pressure pin, and the rear cylindrical section of the pressure pin extending out of the pressure plate.

[0010] Furthermore, the upper section of the base is a cube, and the lateral holes are orthogonally distributed within the upper section of the base.

[0011] Furthermore, the tip of the pressure needle is a spherical surface with an radius of R0.05-0.2.

[0012] Furthermore, the automatic pressing assembly includes a cylinder and a pressing head. The cylinder provides the power for the pressing head to press down and rise. The pressing head presses against the tail end of the electrode needle sleeve to press the electrode needle assembly.

[0013] Furthermore, the electric pressure assembly includes a limiting seat, a baffle, a follower cam, and a servo motor. The limiting seat is a cylindrical structure with a cross groove on its end face. Four long straight holes are evenly distributed in the groove, and a hole is opened at the center for mating with the lower section of the positioning fixture assembly. The baffle is placed in each channel of the cross groove of the limiting seat. The front end face of the baffle is opposite to the cylindrical end of the pressure needle. A threaded hole is opened on the baffle. The rod-shaped threaded connector passes through the threaded hole in sequence into the long straight hole in the groove of the limiting seat and the arc-shaped hole of the follower cam. The follower cam is located below the limiting seat. Four arc-shaped holes are evenly distributed around its axis. The distance of each arc-shaped hole from the axis gradually increases in a clockwise or counterclockwise direction. When it rotates under the drive of the servo motor, the rod-shaped threaded connector moves in the arc-shaped holes, driving the baffle to feed and retract along each channel of the cross groove. When feeding, it pushes the cylindrical end face of the pressure needle to squeeze the electrode assembly, thus completing the anti-loosening of the electrode assembly pressure point.

[0014] Furthermore, the baffle is an L-shaped structural component or a rectangular structural component.

[0015] Furthermore, the distance difference between the rod-shaped threaded connector and the center of the follower cam shaft when it moves from one end of the arc-shaped hole to the other end is the feed or retraction distance of the point pressure needle, and the point pressure requirement is met when the point pressure needle is fed into place.

[0016] Furthermore, the electric pressure assembly also includes a fixed transmission mechanism. The limit seat, the fixed transmission mechanism, and the servo motor are fixedly connected from top to bottom. The fixed transmission mechanism transmits the driving force of the servo motor and drives the follower cam to rotate after reducing the output speed.

[0017] Secondly, a method for preventing loosening of the pressure point of an electrode assembly includes:

[0018] The positioning fixture assembly is fixed on the electric pressing assembly, the assembled electrode assembly is vertically fixed on the positioning fixture assembly, and a lateral thrust member is set around the electrode assembly.

[0019] The electrode assembly is vertically pressed using an automatic pressing component, so that the electrode is pressed into place on the electrode.

[0020] The electric pressure component is used to provide thrust to the thrust component, and the pressure of the electrode assembly is implemented.

[0021] The electrode assembly pressure point anti-loosening device and method provided by the present invention have the following beneficial effects:

[0022] (1) The present invention provides a device and method for preventing loosening of electrode assembly pressure points, which adopts a four-way evenly distributed pressure point method of the pressure point in the center of the positioning tooling assembly. It is suitable for preventing loosening of small fitting and plugging structure connection. The pressure point deformation is small and the depth is consistent, which does not affect the insertion performance of electrode assembly. The connection has a good anti-loosening effect and the electrode needle and electrode sleeve do not move relative to each other when subjected to a pull-out force of 1-3N.

[0023] (2) The present invention provides a device and method for preventing loosening of the electrode assembly pressing point, which uses a servo motor to drive the electric pressing component, and uses a follow-up cam to control the baffle to push the pressing needle to press the electrode assembly. The baffle feed amount control accuracy reaches 0.001mm.

[0024] (3) The present invention provides a device and method for preventing loosening of electrode assembly pressure points. The positioning tooling component specifies the pressure point position. After pressure is applied, the pressure relief spring pops out the pressure point needle to facilitate the removal of the electrode assembly. It is compatible with the pressure application of electrode assemblies of various specifications. Combined with the pressure application component, the pressing and pressure application efficiency of the electrode assembly is increased by about 1 time, and the pass rate is increased by more than 10%. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the electrode assembly structure;

[0026] Figure 2 This is a schematic diagram of the overall structure of the electrode needle assembly pressure point anti-loosening device of the present invention;

[0027] Figure 3 A structural schematic diagram of the positioning tooling assembly;

[0028] Figure 4 This is a schematic diagram of the automatic pressing assembly.

[0029] Figure 5 This is a schematic diagram of the electric pressing assembly;

[0030] Figure 6 This is a schematic diagram of the follower cam.

[0031] Explanation of icon numbers

[0032] 1-Pole pin sleeve; 2-Pole pin; 10-Positioning fixture assembly; 20-Automatic pressing assembly; 30-Electric point pressing assembly; 11-Base; 12-Point pressing pin; 13-Spring; 14-Pressure plate; 15-Threaded connector; 21-Cylinder; 22-Pressure head; 31-Limit seat; 32-Baffle; 33-Rod-shaped threaded connector; 34-Follow-up cam; 35-Fixed transmission mechanism; 36-Servo motor. Detailed Implementation

[0033] The features and advantages of the present invention will become clearer and more explicit from the following detailed description.

[0034] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0035] Figure 1 The image shows the pressed electrode assembly, which mainly consists of electrode sleeve 1 and electrode 2. To prevent electrode 2 from moving relative to electrode sleeve 1 or even separating after multiple insertions of the electrode assembly, four-way point pressure should be evenly distributed at a position about 0.5mm from the end face of electrode sleeve 1 to prevent loosening.

[0036] Figure 2 The diagram shows the structural layout of the electrode needle assembly pressing and anti-loosening device of the present invention. It mainly consists of a positioning fixture assembly 10, an automatic pressing assembly 20, and an electric pressing assembly 30. The positioning fixture assembly 10, the automatic pressing assembly 20, and the electric pressing assembly 30 are fixed on the frame. The positioning fixture assembly 10 is fixed on the electric pressing assembly 30 and is used to vertically fix the assembled electrode needle assembly and provide a lateral thrust to press the electrode needle assembly. The automatic pressing assembly 20 is located above the positioning fixture assembly 10 and vertically presses the electrode needle assembly to ensure that the electrode needle sleeve 1 is pressed into place on the electrode needle 2. The electric pressing assembly 30 provides thrust to the thrusting component to complete the pressing of the electrode needle assembly.

[0037] Figure 3This is a schematic diagram of the positioning fixture assembly 10 of the present invention, which mainly consists of a base 11, pressure pins 12, a spring 13, a pressure plate 14, and screws 15. The upper section of the base 11 is a cube with rounded corners. A vertical through hole (center hole) is opened at the center to place the electrode pin 2. Four-way openings (side holes) are evenly distributed on the sides to place the pressure pins 12. The inside of the side holes forms a through hole that only allows the tip of the electrode pin 2 to pass through. The lower section of the base 11 is a cylindrical section, used to tightly cooperate with the electric pressure assembly 30. The pressure needle 12 is made of SKD11 high wear-resistant and tough general-purpose cold work die steel, heat treated with HRC58. The needle tip is a spherical surface with an R0.05-0.2 or R0.1 diameter. The whole is divided into a conical section and at least three cylindrical sections. One of the middle cylindrical sections fits tightly with the side hole of the base 11. The spring 13 is sleeved on the conical section and the front cylindrical section of the pressure needle 12 near the needle tip. One end presses against the front end of the side hole, and the other end presses against the front end face of the middle cylindrical section. The pressure plate 14 is fixed to the side of the base 11 by threaded connectors 15, such as two screws. The front end face abuts against the rear end face of the middle cylindrical section of the pressure needle 12, and the rear cylindrical section of the pressure needle 12 extends out of the pressure plate 14.

[0038] Figure 4 The diagram shows the automatic pressing assembly 20 of the present invention, which mainly consists of a cylinder 21 and a pressing head 22. The cylinder 21 provides the power for the pressing head 22 to press down and rise. During the pressing operation, the electrode needle 2 is placed in the center hole of the base 11 of the positioning fixture assembly 10, and the electrode needle sleeve 1 is manually pre-installed. The automatic pressing assembly 20 adaptively applies pressure to press the electrode needle assembly, ensuring that the electrode needle sleeve 1 is pressed into place on the electrode needle 2 without damaging the product appearance.

[0039] Figure 5 The diagram shows the electric pressure assembly 30 of the present invention, which mainly consists of a limiting seat 31, a baffle 32, a rod-shaped threaded connector 33, a follower cam 34, a fixed transmission mechanism 35, and a servo motor 36.

[0040] The limiting seat 31 has a cylindrical structure, with a cross-shaped groove on its end face. Four long straight holes are evenly distributed within the groove, and a cylindrical hole is located at the center for engaging with the lower section of the positioning fixture assembly 10 to fix the positioning fixture assembly 10. Multiple threaded holes, such as four, are evenly distributed outside the groove area of ​​the limiting seat 31, which are then fixed to the housing of the lower fixed transmission mechanism 35 via threaded connectors.

[0041] The baffle 32 is placed in each channel of the cross groove of the limiting seat 31, preferably an L-shaped or rectangular structural component. The front end face of the baffle 32 is opposite to the end cylindrical section of the pressure pin 12, and a threaded hole is opened on it. The rod-shaped threaded connector 33, such as a screw, passes through the threaded hole in sequence into the long straight hole in the groove of the limiting seat and the arc-shaped hole of the follower cam.

[0042] The follower cam 34 is located below the limit seat 31, such as Figure 6As shown, four arc-shaped holes are evenly distributed around the axis. The distance between each arc-shaped hole and the axis gradually increases in a clockwise or counterclockwise direction. When the screw rotates under the drive of the servo motor 36, it moves in the arc-shaped hole, which drives the baffle 32 to feed and retract along the grooves of the cross groove (or the long straight hole in the limit seat groove). When feeding, it pushes the cylindrical end face of the positioning fixture assembly 10-point pressure pin 12 to squeeze the electrode assembly, thus completing the anti-loosening of the electrode assembly pressure point.

[0043] Preferably, the distance difference between the screw and the axis of the follower cam 34 when the screw moves from one end of the arc-shaped hole to the other end is the feed or retraction distance of the point pressure needle 12, and the point pressure requirement is met when the point pressure needle 12 is fed into place.

[0044] The positioning fixture assembly 10 restricts the pressure point position of the electrode assembly. When pressing and puncturing the electrode assembly, the positioning fixture assembly 10 is placed in the center hole (such as the central cylindrical hole) of the limiting seat 31 of the electric puncturing assembly 30. The positioning fixture assembly 10 is adjusted so that the end face of the protruding cylindrical section of the puncturing needle 12 is opposite to the baffle 32 of the electric puncturing assembly 30. The electrode needle 2 is placed in the center hole of the base 11 of the positioning fixture assembly 10. The electrode needle sleeve 1 is pre-installed manually. The automatic pressing assembly 20 adaptively applies pressure to press the electrode assembly, ensuring that the electrode needle sleeve 1 is pressed in place without damaging the product appearance. The servo motor 36 works, and the electric puncturing assembly 30 controls the feed amount of the baffle 32 through the follow-up cam 34 to make the pressing depth of the electrode assembly consistent. The baffle 32 pushes the end face of the cylindrical section of the positioning fixture assembly 10 to squeeze the electrode assembly. The spring 13 on the cylindrical section of the point pressure needle 12 is compressed. After holding the pressure for a specified time, the pressure is released, the baffle 32 moves back, and the spring 13 is compressed and springs back to open the point pressure needle 12 to facilitate the removal of the electrode assembly. The positioning fixture assembly 10 pressure plate 14 prevents the point pressure needle 12 from popping out.

[0045] The present invention has been described in detail above with reference to specific embodiments and exemplary examples; however, these descriptions should not be construed as limiting the present invention. Those skilled in the art will understand that various equivalent substitutions, modifications, or improvements can be made to the technical solutions and embodiments of the present invention without departing from the spirit and scope of the invention, and all such modifications and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the appended claims.

[0046] The contents not described in detail in this specification are common knowledge to those skilled in the art.

Claims

1. A pole needle assembly compression point anti-loosening device, characterized in that, The application relates to a positioning tool assembly (10), an automatic pressing assembly (20) and an electric point pressing assembly (30); the positioning tool assembly (10) is fixed on the electric point pressing assembly (30), a sleeved pole needle assembly is vertically fixed on the positioning tool assembly (10), and a lateral thrust element is arranged in the circumferential direction of the pole needle assembly; the automatic pressing assembly (20) is located above the positioning tool assembly (10) and vertically presses the pole needle assembly, so that a pole needle sleeve (1) is pressed into position on a pole needle (2); the electric point pressing assembly (30) provides thrust for the thrust element and implements point pressing of the pole needle assembly. The positioning tool assembly (10) comprises a base (11), a point pressing needle (12), a spring (13) and a pressing plate (14); a through hole is vertically formed in the center of the upper section of the base (11) and is used for placing the pole needle (2); four lateral holes are uniformly distributed on the side of the base (11) and are used for placing the point pressing needle (12); the inner side of the lateral hole is formed with a through hole which only allows the needle tip of the pole needle (2) to pass through; the lower section of the base (11) is a column section and is used for closely matching the electric point pressing assembly (30); the point pressing needle (12) is divided into a conical section and multiple cylindrical sections; one intermediate cylindrical section closely matches the lateral hole of the base (11); the spring (13) is sleeved on the conical section and the front cylindrical section of the point pressing needle (12) close to the needle tip; one end of the spring (13) is pressed against the front end of the lateral hole, and the other end is pressed against the front end face of the intermediate cylindrical section; the pressing plate (14) is fixed on the side of the base (11) through a threaded connecting piece; the front end face of the pressing plate (14) abuts against the rear end face of the intermediate cylindrical section of the point pressing needle (12); and the rear end cylindrical section of the point pressing needle (12) extends out of the pressing plate (14).

2. The pole needle assembly compression point anti-loosening device according to claim 1, characterized in that, The upper section of the base (11) is a square, and the lateral holes are orthogonally distributed in the upper section of the base (11).

3. The pole needle assembly compression point anti-loosening device according to claim 1, characterized in that, The needle tip of the point pressing needle (12) is a R0.05-0.2 spherical surface.

4. The pole needle assembly compression point anti-loosening device according to claim 1, characterized in that, The automatic pressing assembly (20) comprises a cylinder (21) and a pressing head (22); the cylinder (21) provides power for the pressing head (22) to move downwards and upwards; the pressing head (22) abuts against the tail end of the pole needle sleeve (1) and presses and combines the pole needle assembly.

5. The pole needle assembly compression point anti-loosening device according to claim 1, characterized in that, The electric point pressing assembly (30) comprises a limiting base (31), a baffle (32), a follow-up cam (34) and a servo motor (36). The limiting base (31) is a column structure, the end face is provided with a cross groove, four long straight holes are uniformly distributed in the groove, and a hole is formed in the center position and is used for matching the lower section of the positioning tool assembly (10); The baffle (32) is arranged in each groove of the cross groove of the limiting base (31); the front end face of the baffle (32) is opposite to the end cylindrical section of the point pressing needle (12); threaded holes are formed in the baffle (32); and a rod-shaped threaded connecting piece is sequentially inserted into the long straight holes of the limiting base groove and the arc-shaped holes of the follow-up cam from the threaded holes. The follow-up cam (34) is located below the limiting base (31); four arc-shaped holes are uniformly distributed around the axis of the follow-up cam (34); the distance between each arc-shaped hole and the axis gradually increases in the clockwise or counterclockwise direction; under the driving of the servo motor (36), the rod-shaped threaded connecting piece moves in the arc-shaped hole, drives the baffle (32) to feed and retreat along each groove of the cross groove, pushes the cylindrical section end face of the point pressing needle (12) to press the pole needle assembly when feeding, and completes the point pressing and anti-loosening of the pole needle assembly.

6. The pole needle assembly compression point anti-loosening device according to claim 5, characterized in that, The baffle (32) is an L-shaped structure or a rectangular structure.

7. The pole needle assembly compression point anti-loosening device according to claim 5, characterized in that, The distance difference between the rod-shaped threaded connection from one end of the arc-shaped hole to the other end from the center of the follow-up cam (34) is the feeding or retreating distance of the point pressure needle (12), and the point pressure needle (12) meets the point pressure requirement when it is fed to the position.

8. The pole needle assembly compression point anti-loosening device according to claim 1, characterized in that, The electric point pressure assembly (30) further comprises a fixed transmission mechanism (35), the limiting seat (31), the fixed transmission mechanism (35) and the servo motor (36) are fixedly connected from top to bottom, the fixed transmission mechanism (35) transmits the driving force of the servo motor (36), and the output rotating speed is reduced to drive the follow-up cam (34) to rotate.

9. A method for preventing the loosening of a pressing point of a pole needle assembly, characterized by, The pole needle assembly point pressure anti-loose device comprises the pole needle assembly, the automatic pressure assembly (20), the electric point pressure assembly (30) and the positioning tool assembly (10). The positioning tool assembly (10) is fixed on the electric point pressure assembly (30), the pole needle assembly is vertically fixed on the positioning tool assembly (10), and the lateral thrust element is arranged in the circumferential direction of the pole needle assembly; The automatic pressure assembly (20) is used for vertically pressing the pole needle assembly, and the pole needle sleeve (1) is pressed on the pole needle (2) to the position; The electric point pressure assembly (30) is used for providing thrust for the thrust element, and the pole needle assembly point pressure is implemented.

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