L-shaped contact pin positioning and press-fitting structure and method

Abstract

The invention discloses an L-shaped contact pin positioning and press-fitting structure and method. The L-shaped contact pin positioning and press-fitting structure comprises an L-shaped shell pressing plate and an L-shaped positioning tool. The height of the L-shaped shell pressing plate can be increased and decreased, and the top face, located under the L-shaped shell pressing plate, of the L-shaped shell can be pressed and positioned. The L-shaped positioning tool comprises an L-shaped positioning bottom plate, an L-shaped lifting limiting plate and an L-shaped horizontal push plate; the L-shaped positioning bottom plate is arranged at the bottom of the L-shaped through positioning groove in a suspended mode, can synchronously ascend and descend along with the L-shaped shell pressing plate and can stretch into an inner cavity of the L-shaped shell. The L-shaped lifting limiting plate faces the L-shaped pin holes, the height of the L-shaped lifting limiting plate can be lifted, and the bottom of the L-shaped lifting limiting plate is provided with L-shaped pin limiting grooves which are equal to the L-shaped pin holes in number and are in one-to-one correspondence with the L-shaped pin holes; the L-shaped horizontal push plate can horizontally slide in the direction of the L-shaped lifting limiting plate under the driving of external force. According to the press-fitting device, the multiple L-shaped contact pins can be synchronously pressed into the L-shaped contact pin holes of the L-shaped shell of the automobile actuator, and in the press-fitting process, the press-fitting process is accurate, free of deformation and high in consistency.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic pin insertion machines, and in particular to an L-shaped pin positioning and pressing structure and method. Background Art

[0002] In the manufacturing process of automobile grille actuators, the pin insertion process plays a core role. Different types of PIN pins have different process requirements, among which the L-type PIN pin insertion process is particularly critical. However, the current processing of L-type PIN pins mainly relies on semi-automatic insertion, which requires manual pre-installation and then press-fitting by the equipment, resulting in limited insertion speed and low production efficiency. In addition, this method requires frequent manual intervention and high labor intensity, requiring staff to constantly manually adjust the jig, which not only greatly increases physical exertion, but may also cause fluctuations in the insertion quality due to operator fatigue, and cannot guarantee the accuracy of the connection position, which is prone to poor pin insertion and leads to a low pass rate.

[0003] In response to the above challenges, the present invention proposes a solution, which adopts a highly automated plug-in process, aiming to significantly improve the plug-in efficiency of L-type PIN needles, realize fast and accurate positioning and plug-in of L-type PIN needles, and thus optimize and improve production efficiency. Summary of the invention

[0004] The technical problem to be solved by the present invention is to address the deficiencies of the above-mentioned prior art and to provide an L-shaped pin positioning and pressing structure and method, which can synchronously press-fit multiple L-shaped pins into the L-shaped pin holes of the L-shaped shell of the automobile actuator, and ensure that each L-shaped pin can be accurately and consistently inserted into the predetermined position without deformation, and the pin qualification rate is high.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] An L-shaped pin positioning and pressing structure comprises an L-shaped shell pressing plate and an L-shaped positioning tool.

[0007] The L-shaped plug is L-shaped, and includes a plug-in portion, an L-shaped bending portion and an electrical interface portion which are arranged in sequence as a whole; wherein the plug-in portion is arranged horizontally, and the electrical interface portion is arranged vertically.

[0008] The L-shaped housing is located at the L-shaped pin positioning and pressing station and has a plurality of L-shaped pin holes arranged horizontally in parallel.

[0009] The L-shaped shell clamping plate is located directly above the L-shaped pin positioning and pressing station, and its height can be raised and lowered; when the height of the L-shaped shell clamping plate is lowered, the top surface of the L-shaped shell located on the L-shaped pin positioning and pressing station can be clamped and positioned.

[0010] An L-shaped through positioning groove is arranged on one side of the L-shaped shell pressing plate facing the L-shaped pin hole.

[0011] The L-shaped positioning tooling includes an L-shaped positioning base plate, an L-shaped lifting limit plate and an L-shaped horizontal push plate.

[0012] The L-shaped positioning bottom plate is suspended and arranged at the bottom of the L-shaped through positioning groove, can be raised and lowered synchronously with the pressing plate of the L-shaped shell, and can extend into the inner cavity of the L-shaped shell.

[0013] The L-shaped lifting limit plate and the L-shaped horizontal push plate are relatively arranged on both sides of the L-shaped positioning base plate, wherein the L-shaped lifting limit plate faces the L-shaped pin hole, and the height of the L-shaped lifting limit plate can be raised and lowered. The bottom of the L-shaped lifting limit plate is provided with L-shaped pin limiting grooves that are equal to and one-to-one with the L-shaped pin holes, and the bottom end of each L-shaped pin limiting groove is opened.

[0014] The L-shaped horizontal push plate can slide horizontally toward the direction of the L-shaped lifting limit plate under the drive of external force.

[0015] Each L-shaped pin limiting groove is a horn groove, the flared end of the horn groove faces the L-shaped horizontal push plate, and the width is greater than the L-shaped pin hole; the contracted end of the horn groove faces the L-shaped pin hole, and the width is equal to the L-shaped pin hole.

[0016] The speaker slot shall not be less than 1.5 times the size of the L-shaped pin hole.

[0017] It also includes a shell transmission line for L-shaped shell transmission, the shell transmission line has an L-shaped pin positioning and pressing station; each L-shaped pin hole is perpendicular to the shell transmission line.

[0018] It also includes an L-shaped lifting component, which is arranged on one side of the L-shaped pin positioning and pressing station and is used to drive the height of the L-shaped shell clamping plate to rise and fall.

[0019] It also includes a horizontal press-fitting assembly, which is used to drive the horizontal sliding of the L-shaped horizontal push plate.

[0020] An electrical interface push plate is arranged on the L-shaped horizontal push plate wall facing the L-shaped lifting limit plate. There is a gap between the electrical interface push plate and the L-shaped positioning bottom plate, and the gap is not less than the thickness of the plug-in part.

[0021] A method for positioning and pressing an L-shaped pin comprises the following steps.

[0022] Step 1, pressing the L-shaped shell: the L-shaped shell pressing plate carries the L-shaped positioning tooling and descends synchronously until the L-shaped shell pressing plate presses and positions the top surface of the L-shaped shell located on the L-shaped pin positioning and pressing station.

[0023] Step 2, aligning the position of the L-shaped positioning base plate: while the L-shaped positioning base plate presses the L-shaped shell, the L-shaped positioning base plate extends into the inner cavity of the L-shaped shell, and the top surface of the L-shaped positioning base plate is flush with the bottom surface of the L-shaped pin hole.

[0024] Step 3, forming a closed L-shaped pin limit groove: the height of the L-shaped lifting limit plate is lowered until it contacts the top surface of the L-shaped positioning base plate, so that each L-shaped pin limit groove with an opening at the bottom is enclosed with the L-shaped positioning base plate to form a closed L-shaped pin limit groove.

[0025] Step 4, placing L-shaped pins: place L-shaped pins with the same number as the L-shaped pin holes on the top surface of the L-shaped positioning base plate between the L-shaped lifting limit plate and the L-shaped horizontal push plate; wherein, the plug-in portion of the L-shaped pin is in direct contact with the top surface of the L-shaped positioning base plate; the tip of the plug-in portion of the L-shaped pin points to the corresponding closed L-shaped pin limit slot; the electrical interface portion of the L-shaped pin faces the L-shaped horizontal push plate.

[0026] Step 5, pre-pressing the L-shaped pins: the L-shaped horizontal push plate slides horizontally toward the direction of the L-shaped lifting limit plate, and during the sliding process, it contacts the outer side walls of the electrical interface parts of all L-shaped pins placed on the L-shaped positioning base plate; the L-shaped horizontal push plate continues to slide horizontally toward the direction of the L-shaped lifting limit plate to a set distance, and the tip of the plug-in part of each L-shaped pin passes through the corresponding closed L-shaped pin limit groove in turn, and enters the corresponding L-shaped pin hole to the set depth, completing the pre-pressing of each L-shaped pin.

[0027] Step 6, L-shaped lifting limit plate avoidance: The L-shaped lifting limit plate rises, and the bottom surface of the L-shaped lifting limit plate is not lower than the top surface height of the electrical interface part of each L-shaped pin.

[0028] Step 7, L-shaped pin secondary press-fitting: The L-shaped horizontal push plate slides forward horizontally to the set distance again, so that all L-shaped pins are separated from the L-shaped positioning base plate, and the plug-in part of the L-shaped pin is fully inserted into the corresponding L-shaped pin hole, thereby completing the synchronous positioning and press-fitting of all L-shaped pins and the L-shaped shell.

[0029] Step 8, reset: the height of the L-shaped shell clamping plate rises, and the clamping of the L-shaped shell that has been pressed is released. The L-shaped shell that has been pressed enters the next process, and the L-shaped horizontal push plate is reset; the L-shaped pin positioning and pressing station enters the new L-shaped shell to be pressed, and steps 1 to 8 are repeated to press the L-shaped pin of the next L-shaped shell to be pressed.

[0030] The L-shaped pin limiting groove in step 3 is a horn groove, and the flared end of the horn groove faces the L-shaped horizontal push plate; during the L-shaped pin pre-pressing process in step 5, the horn groove can facilitate the entry and guidance of the L-shaped pin, preventing the pre-pressing deformation of the L-shaped pin connection part.

[0031] In step 8, the L-shaped horizontal push plate slides horizontally toward the L-shaped pin hole under the drive of the horizontal press-fitting assembly, and automatically resets under the action of the horizontal reset spring.

[0032] The present invention has the following beneficial effects:

[0033] 1. The L-shaped shell pressing plate in the present invention can press the L-shaped shell to be press-fitted with the pins, so as to facilitate the subsequent press-fitting of the L-shaped pins.

[0034] 2. The L-shaped positioning base plate and the L-shaped lifting limit plate in the L-shaped positioning tooling of the present invention jointly constitute a closed L-shaped pin limiting groove, which supports and guides the front end of the plug-in part of each L-shaped pin to avoid deformation of the L-shaped pin during pre-pressing. When the L-shaped pin enters the L-shaped pin hole to a set depth and the front end of the plug-in part is supported and guided by the L-shaped pin hole, the height of the L-shaped lifting limit plate rises and can be avoided, which does not affect the secondary press-fitting of the L-shaped pin, thereby ensuring the assembly accuracy and success rate.

[0035] 3. The horizontal clamping assembly and the L-shaped horizontal push plate can press-fit all L-shaped pins in each L-shaped housing at one time, so that the press-fitting consistency is high and the qualified rate is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 The overall structural schematic diagram of an L-shaped pin positioning press-fitting structure of the present invention is shown.

[0037] Figure 2 A three-dimensional structural schematic diagram of a preferred embodiment of an L-shaped pin positioning press-fitting structure of the present invention is shown.

[0038] Figure 3 Shows Figure 2 A three-dimensional schematic diagram of the partial cross-section of the L-shaped pin positioning press-fit structure.

[0039] Figure 4 The schematic diagram of the structure of the horizontal press-fit assembly in the present invention is shown.

[0040] Figure 5 A schematic diagram of the structure of a group of four L-shaped pins corresponding to an L-shaped housing in the present invention is shown.

[0041] Figure 6 The schematic diagram of the structure of the L-shaped housing placed on the housing tooling plate in the present invention is shown.

[0042] Among them are:

[0043] 610. L-shaped housing press plate; 611. L-shaped through positioning groove;

[0044] 620.L-type positioning tooling;

[0045] 621. L-shaped positioning base plate; 6211. Suspension connecting plate;

[0046] 622. L-shaped lifting limit plate; 6221. L-shaped pin limit slot; 6222. L-shaped lifting connecting rod; 6223. Inverted U-shaped lifting connecting plate; 6224. L-shaped lifting motor; 6225. Inverted U-shaped motor mounting seat;

[0047] 623.L-shaped horizontal push plate;

[0048] 6231. Push plate of electrical interface; 6232. Mating surface of L-shaped bending portion; 6233. Guide push rod; 6234. Return spring;

[0049] 630.L-type lifting assembly;

[0050] 540. Horizontal press assembly; 541. Horizontal press head; 542. Horizontal press cylinder; 543. Horizontal press guide rail; 544. Support frame;

[0051] 820.L-shaped housing; 821.L-shaped pin hole;

[0052] 840. Shell transmission line; 842. L-type pin positioning and pressing station; 844. Shell tooling board;

[0053] 920. L-shaped pin; 921. L-shaped bending portion; 940. Plug-in portion; 950. Electrical interface portion; 960. Barb. DETAILED DESCRIPTION

[0054] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

[0055] In the description of the present invention, it should be understood that the terms "left side", "right side", "upper part", "lower part" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second" and the like do not indicate the importance of the components, and therefore cannot be understood as limiting the present invention. The specific dimensions used in this embodiment are only for illustrating the technical solution, and do not limit the scope of protection of the present invention.

[0056] like Figure 5 As shown, each L-shaped pin is L-shaped, including a plug-in portion 940, an L-shaped bending portion 921 and an electrical interface portion 950 which are integrally arranged in sequence; wherein the plug-in portion is horizontally arranged, a barb 960 is arranged on the plug-in portion near the L-shaped bending portion, and the electrical interface portion is vertically arranged for external power connection.

[0057] like Figure 6As shown, the L-shaped housing 820 has a plurality of L-shaped pin holes 821 arranged horizontally in parallel, preferably four.

[0058] like Figure 1 , Figure 2 and Figure 3 As shown, an L-shaped pin positioning and pressing structure includes a shell transmission line 840, an L-shaped shell clamping plate 610, an L-shaped positioning tool 620, an L-shaped lifting assembly 630 and a horizontal pressing assembly 540.

[0059] The shell transmission line can transmit L-shaped shells, and has a shell loading station and an L-shaped pin positioning and pressing station 842. The shell transmission line transmits between the shell loading station and the L-shaped pin positioning and pressing station through a shell tooling plate 844.

[0060] Furthermore, the shell transmission line is perpendicular to each L-shaped pin hole of the L-shaped shell, that is, the subsequent press-fitting direction of the L-shaped pin is perpendicular to the shell transmission line.

[0061] The L-shaped housing clamping plate is located directly above the L-shaped pin positioning and pressing station, and can be raised and lowered under the drive of the L-shaped lifting assembly; when the height of the L-shaped housing clamping plate is lowered, the top surface of the L-shaped housing located on the L-shaped pin positioning and pressing station can be pressed and positioned. The L-shaped lifting assembly is arranged on one side of the L-shaped pin positioning and pressing station, which is a prior art and will not be described in detail here.

[0062] An L-shaped through positioning groove 611 is provided on one side of the L-shaped housing clamping plate facing the L-shaped pin hole.

[0063] The L-shaped positioning tooling includes an L-shaped positioning base plate 621 , an L-shaped lifting limit plate 622 and an L-shaped horizontal push plate 623 .

[0064] The L-shaped positioning base plate is preferably suspended and arranged at the bottom of the L-shaped through positioning groove by two suspension connecting plates 6211, and can be raised and lowered synchronously with the L-shaped shell clamping plate, and can extend into the inner cavity of the L-shaped shell. Furthermore, the bottom surface of the L-shaped positioning base plate can be provided with an avoidance groove that matches the inner cavity component of the L-shaped shell.

[0065] The L-shaped lifting limit plate and the L-shaped horizontal push plate are arranged relatively on two sides of the L-shaped positioning bottom plate (preferably the long side).

[0066] The L-shaped lifting limit plate is oriented toward and close to the inner side of the L-shaped pin hole, and the L-shaped lifting limit plate can preferably be lifted and lowered in height under the drive of the L-shaped lifting limit assembly.

[0067] The above-mentioned L-shaped lifting limit assembly is preferably an L-shaped lifting motor 6224, and the L-shaped lifting motor 6224 is preferably installed on both sides of the top of the L-shaped shell clamping plate through an inverted U-shaped motor mounting seat 6225 to provide avoidance space for the subsequent L-shaped horizontal push plate.

[0068] An inverted U-shaped lifting connecting plate 6223 is preferably installed at the bottom of the above-mentioned L-shaped lifting motor. The two side legs of the inverted U-shaped lifting connecting plate are preferably connected to an L-shaped lifting connecting rod 6222. The two L-shaped lifting connecting rods are preferably located on both sides of the subsequent L-shaped horizontal push plate and the L-shaped through-positioning groove, and flanges that can overlap with the L-shaped positioning base plate are formed on both sides of the L-shaped through-positioning groove, so as to limit the descending position of the L-shaped lifting limit plate.

[0069] The L-shaped lifting limit plate is preferably U-shaped, so as to facilitate the automatic discharge of the L-shaped pin.

[0070] The bottom of the L-shaped lifting limit plate is provided with L-shaped pin limiting grooves 6221, which are equal in number to and correspond to the L-shaped pin holes, and the bottom end of each L-shaped pin limiting groove is open.

[0071] Furthermore, each L-shaped pin limiting groove is a horn groove, the contracted end of the horn groove is adjacent to or in contact with the L-shaped pin hole, and the width is equal to the L-shaped pin hole; the flared end of the horn groove faces the L-shaped horizontal push plate, and the width is greater than the L-shaped pin hole.

[0072] Furthermore, the speaker groove is preferably not less than 1.5 times the L-shaped pin hole. In the present embodiment, it is preferably 2 times. The width of the L-shaped lifting limit plate is preferably half the length of the L-shaped pin plug-in portion.

[0073] The arrangement of the speaker groove can correct small deviations during the placement or horizontal movement of the L-shaped pin, and guide it so that the L-shaped pin is aligned with the L-shaped pin hole, and prevent deformation and deviation.

[0074] The L-shaped horizontal push plate can slide horizontally toward the direction of the L-shaped lifting limit plate under the drive of an external force (ie, a horizontal press-fit assembly).

[0075] Furthermore, a guide push rod 6233 is connected to the middle and upper part of the L-shaped horizontal push plate, and return springs 6234 are arranged on both sides of the guide push rod. The return springs can reset the L-shaped horizontal push plate.

[0076] Furthermore, an electrical interface push plate 6231 is provided on the wall surface of the L-shaped horizontal push plate facing the side of the L-shaped lifting limit plate, and there is a gap between the electrical interface push plate and the L-shaped positioning base plate, and the gap is not less than the thickness of the plug-in part; the above-mentioned gap is also formed into an L-shaped bending part mating surface 6232 that cooperates with the L-shaped bending part.

[0077] like Figure 4As shown, the above-mentioned horizontal press assembly preferably includes a horizontal press head 541, a horizontal press electric cylinder 542, a horizontal press guide rail 543 and a support frame 544. Among them, the support frame is arranged on one side of the shell conveyor line, the horizontal press guide rail is installed on the top of the support frame, and the horizontal press electric cylinder is installed on the horizontal press guide rail for easy sharing with other processes. The horizontal press electric cylinder is used to drive the extension and retraction of the horizontal press head, thereby promoting the horizontal movement of the horizontal push head.

[0078] A method for positioning and pressing an L-shaped pin comprises the following steps.

[0079] Step 1, pressing the L-shaped shell: the L-shaped shell pressing plate carries the L-shaped positioning tooling and descends synchronously until the L-shaped shell pressing plate presses and positions the top surface of the L-shaped shell located on the L-shaped pin positioning and pressing station.

[0080] Step 2, aligning the position of the L-shaped positioning base plate: while the L-shaped positioning base plate presses the L-shaped shell, the L-shaped positioning base plate extends into the inner cavity of the L-shaped shell, and the top surface of the L-shaped positioning base plate is flush with the bottom surface of the L-shaped pin hole.

[0081] Step 3, forming a closed L-shaped pin limit groove: the height of the L-shaped lifting limit plate is lowered until it contacts the top surface of the L-shaped positioning base plate, so that each L-shaped pin limit groove with an opening at the bottom is enclosed with the L-shaped positioning base plate to form a closed L-shaped pin limit groove.

[0082] Step 4, placing L-shaped pins: place L-shaped pins with the same number as the L-shaped pin holes on the top surface of the L-shaped positioning base plate between the L-shaped lifting limit plate and the L-shaped horizontal push plate; wherein, the plug-in portion of the L-shaped pin is in direct contact with the top surface of the L-shaped positioning base plate; the tip of the plug-in portion of the L-shaped pin points to the corresponding closed L-shaped pin limit slot; the electrical interface portion of the L-shaped pin faces the L-shaped horizontal push plate.

[0083] Step 5, pre-pressing the L-shaped pins: the L-shaped horizontal push plate slides horizontally toward the direction of the L-shaped lifting limit plate, and during the sliding process, it contacts the outer side walls of the electrical interface parts of all L-shaped pins placed on the L-shaped positioning base plate; the L-shaped horizontal push plate continues to slide horizontally toward the direction of the L-shaped lifting limit plate to a set distance, and the tip of the plug-in part of each L-shaped pin passes through the corresponding closed L-shaped pin limit groove in turn, and enters the corresponding L-shaped pin hole to the set depth, completing the pre-pressing of each L-shaped pin.

[0084] Step 6, L-shaped lifting limit plate avoidance: The L-shaped lifting limit plate rises, and the bottom surface of the L-shaped lifting limit plate is not lower than the top surface height of the electrical interface part of each L-shaped pin.

[0085] Step 7, L-shaped pin secondary press-fitting: The L-shaped horizontal push plate slides forward horizontally to the set distance again, so that all L-shaped pins are separated from the L-shaped positioning base plate, and the plug-in part of the L-shaped pin is fully inserted into the corresponding L-shaped pin hole, thereby completing the synchronous positioning and press-fitting of all L-shaped pins and the L-shaped shell.

[0086] Step 8, reset: the height of the L-shaped shell clamping plate rises, and the clamping of the L-shaped shell that has been pressed is released. The L-shaped shell that has been pressed enters the next process, and the L-shaped horizontal push plate is reset; the L-shaped pin positioning and pressing station enters the new L-shaped shell to be pressed, and steps 1 to 8 are repeated to press the L-shaped pin of the next L-shaped shell to be pressed.

[0087] The L-shaped pin limiting groove in step 3 is a horn groove, and the flared end of the horn groove faces the L-shaped horizontal push plate; during the L-shaped pin pre-pressing process in step 5, the horn groove can facilitate the entry and guidance of the L-shaped pin, preventing the pre-pressing deformation of the L-shaped pin connection part.

[0088] In step 8, the L-shaped horizontal push plate slides horizontally toward the L-shaped pin hole under the drive of the horizontal press-fitting assembly, and automatically resets under the action of the horizontal reset spring.

[0089] The preferred embodiments of the present invention are described in detail above; however, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.

Claims

1. An L-shaped pin positioning press-fit structure, characterized in that: It includes an L-shaped shell clamping plate and an L-shaped positioning tool; The L-shaped plug is L-shaped, and comprises a plug-in portion, an L-shaped bending portion and an electrical interface portion which are sequentially arranged in an integrated manner; wherein the plug-in portion is arranged horizontally, and the electrical interface portion is arranged vertically; The L-shaped housing is located at the L-shaped pin positioning and pressing station and has a plurality of L-shaped pin holes arranged horizontally in parallel; The L-shaped shell clamping plate is located directly above the L-shaped pin positioning and pressing station, and its height can be raised and lowered; when the height of the L-shaped shell clamping plate is lowered, the top surface of the L-shaped shell located on the L-shaped pin positioning and pressing station can be pressed and positioned; An L-shaped through positioning groove is provided on one side of the L-shaped housing clamping plate facing the L-shaped pin hole; The L-shaped positioning tooling includes an L-shaped positioning base plate, an L-shaped lifting limit plate and an L-shaped horizontal push plate; The L-shaped positioning base plate is suspended and arranged at the bottom of the L-shaped through positioning groove, and can be raised and lowered synchronously with the pressing plate of the L-shaped shell, and can extend into the inner cavity of the L-shaped shell; The L-shaped lifting limit plate and the L-shaped horizontal push plate are arranged on both sides of the L-shaped positioning bottom plate, wherein the L-shaped lifting limit plate faces the L-shaped pin hole, and the height of the L-shaped lifting limit plate can be raised and lowered. The bottom of the L-shaped lifting limit plate is provided with L-shaped pin limit grooves that are equal in number to the L-shaped pin holes and correspond one to one, and the bottom end of each L-shaped pin limit groove is open; The L-shaped horizontal push plate can slide horizontally toward the direction of the L-shaped lifting limit plate under the drive of external force.

2. The L-shaped pin positioning and pressing structure according to claim 1, characterized in that: Each L-shaped pin limiting groove is a horn groove, the flared end of the horn groove faces the L-shaped horizontal push plate, and the width is greater than the L-shaped pin hole; the contracted end of the horn groove faces the L-shaped pin hole, and the width is equal to the L-shaped pin hole.

3. The L-shaped pin positioning and pressing structure according to claim 2, characterized in that: The speaker slot shall not be less than 1.5 times the size of the L-shaped pin hole.

4. The L-shaped pin positioning and pressing structure according to claim 1, characterized in that: It also includes a shell transmission line for L-shaped shell transmission, the shell transmission line has an L-shaped pin positioning and pressing station; each L-shaped pin hole is perpendicular to the shell transmission line.

5. The L-shaped pin positioning and pressing structure according to claim 1, characterized in that: It also includes an L-shaped lifting component, which is arranged on one side of the L-shaped pin positioning and pressing station and is used to drive the height of the L-shaped shell clamping plate to rise and fall.

6. The L-shaped pin positioning and pressing structure according to claim 1, characterized in that: It also includes a horizontal press-fitting assembly, which is used to drive the horizontal sliding of the L-shaped horizontal push plate.

7. The L-shaped pin positioning and pressing structure according to claim 1, characterized in that: An electrical interface push plate is arranged on the L-shaped horizontal push plate wall facing the L-shaped lifting limit plate. There is a gap between the electrical interface push plate and the L-shaped positioning bottom plate, and the gap is not less than the thickness of the plug-in part.

8. A method for positioning and pressing an L-shaped pin, characterized in that: The steps include: Step 1, pressing the L-shaped shell: the L-shaped shell pressing plate carries the L-shaped positioning tooling and descends synchronously until the L-shaped shell pressing plate presses and positions the top surface of the L-shaped shell located on the L-shaped pin positioning and pressing station; Step 2, aligning the position of the L-shaped positioning base plate: while the L-shaped positioning base plate is pressing the L-shaped shell, the L-shaped positioning base plate extends into the inner cavity of the L-shaped shell, and the top surface of the L-shaped positioning base plate is flush with the bottom surface of the L-shaped pin hole; Step 3, forming a closed L-shaped pin limiting groove: the height of the L-shaped lifting limit plate is lowered until it contacts the top surface of the L-shaped positioning bottom plate, so that each L-shaped pin limiting groove with an opening at the bottom is enclosed with the L-shaped positioning bottom plate to form a closed L-shaped pin limiting groove; Step 4, placing L-shaped pins: placing L-shaped pins with the same number as the L-shaped pin holes on the top surface of the L-shaped positioning base plate between the L-shaped lifting limit plate and the L-shaped horizontal push plate; wherein the plug-in portion of the L-shaped pin is in direct contact with the top surface of the L-shaped positioning base plate; the tip of the plug-in portion of the L-shaped pin points to the corresponding closed L-shaped pin limit slot; the electrical interface portion of the L-shaped pin faces the L-shaped horizontal push plate; Step 5, pre-pressing the L-shaped pins: the L-shaped horizontal push plate slides horizontally toward the L-shaped lifting limit plate, and during the sliding process, it contacts the outer side walls of the electrical interface parts of all L-shaped pins placed on the L-shaped positioning bottom plate; the L-shaped horizontal push plate continues to slide horizontally toward the L-shaped lifting limit plate to a set distance, and the tip of the plug-in part of each L-shaped pin passes through the corresponding closed L-shaped pin limit groove in turn, and enters the corresponding L-shaped pin hole to a set depth, completing the pre-pressing of each L-shaped pin; Step 6, L-shaped lifting limit plate avoidance: the L-shaped lifting limit plate is raised, and the bottom surface height of the L-shaped lifting limit plate is not lower than the top surface height of the electrical interface part of each L-shaped pin; Step 7, L-shaped pin secondary press-fitting: The L-shaped horizontal push plate slides forward horizontally to the set distance again, so that all L-shaped pins are separated from the L-shaped positioning base plate, and the plug-in parts of the L-shaped pins are fully inserted into the corresponding L-shaped pin holes, thereby completing the synchronous positioning and press-fitting of all L-shaped pins and the L-shaped housing; Step 8, reset: the height of the L-shaped shell clamping plate rises, and the clamping of the L-shaped shell that has been pressed is released. The L-shaped shell that has been pressed enters the next process, and the L-shaped horizontal push plate is reset; the L-shaped pin positioning and pressing station enters the new L-shaped shell to be pressed, and steps 1 to 8 are repeated to press the L-shaped pin of the next L-shaped shell to be pressed.

9. The L-shaped pin positioning and press-fitting method according to claim 8, characterized in that: The L-shaped pin limiting groove in step 3 is a horn groove, and the flared end of the horn groove faces the L-shaped horizontal push plate; during the L-shaped pin pre-pressing process in step 5, the horn groove can facilitate the entry and guidance of the L-shaped pin, preventing the pre-pressing deformation of the L-shaped pin connection part.

10. The L-shaped pin positioning and press-fitting method according to claim 8, characterized in that: In step 8, the L-shaped horizontal push plate slides horizontally toward the L-shaped pin hole under the drive of the horizontal press-fitting assembly, and automatically resets under the action of the horizontal reset spring.

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