Pin pressing tool for lower support

Abstract

The utility model relates to a pin pressing tool for a lower support. The tool is mainly composed of a rack assembly, a stamping mechanism and a stamping die assembly. The stamping mechanism comprises a fixing frame and a driving assembly, and the driving assembly provides power through a stamping air cylinder and drives related parts to move through a stamping connecting piece. In the stamping die assembly, a lower die base is provided with a limiting table and a guide rod, and accurate movement of an upper die base is guaranteed. A positioning pin at the bottom of the lower punch is matched with a spring to stably fix the lower support, and the lower punch is higher than the table top of the lower die base so as to better support. A pin shaft groove in the bottom of the upper punch accurately positions the pin shaft. During working, the lower support and the pin shaft are placed firstly, the punching mechanism is started, the upper punch is driven to press the pin shaft into the lower support, and the part is reset after pin pressing is completed. The tool achieves efficient and accurate operation of lower support pin pressing, effectively solves the problems that a traditional pin pressing mode is low in efficiency, poor in precision and the like, and is suitable for the field of lower support production and manufacturing.

Description

Technical Field

[0001] This utility model relates to the field of stamping manufacturing, and in particular to a lower bracket pressing pin tooling. Background Technology

[0002] In the production process of lower brackets for electric vehicle pedals, the pin-pressing process is a crucial step that decisively impacts the quality and performance of the lower bracket. Previously, manual pin-pressing was employed. However, this method has numerous drawbacks. Its production efficiency is extremely low, and the precision and quality of pin-pressing are highly dependent on the operator's experience and skills. Given the varying skill levels of operators, it is difficult to guarantee that the pin-pressing quality of each lower bracket meets a uniform standard, easily leading to inconsistent pin insertion depth and positional misalignment. These problems directly reduce the overall performance of the lower bracket, shorten its service life, and severely impact product quality. Furthermore, during the pin-pressing process, it is impossible to ensure that the pin is accurately pressed into the preset position on the lower bracket, resulting in a high scrap rate. From a production efficiency perspective, existing tooling is ill-suited for large-scale production. Its pin-pressing process is cumbersome and complex, only allowing pin-pressing of a single lower bracket at a time, hindering large-scale, batch production and significantly limiting the company's capacity expansion. At the same time, due to the lack of effective automated control and safety protection mechanisms, there are certain safety risks in the production process, which can easily threaten the personal safety of operators. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this utility model aims to provide a lower support pin-pressing fixture, solving the problems existing in the prior art. This fixture effectively solves many problems associated with traditional pin-pressing methods through a series of innovative designs. In terms of improving production efficiency, the fixture is equipped with a stamping mechanism, where the stamping cylinder in the drive assembly provides stable and powerful force. The connection between the stamping connector and the middle die fixing plate enables the stamping die assembly to perform the pin-pressing action quickly and efficiently. Compared to traditional manual pin-pressing, this significantly shortens the pin-pressing time for each lower support and enables continuous operation, laying the foundation for large-scale, batch production.

[0005] The design of the die assembly is crucial for ensuring the accuracy and quality of the pin pressing. The fixed limiting platform and movable guide rod on the lower die base provide precise guidance for the movement of the upper die base, ensuring accurate alignment of the upper and lower punches during the pin pressing process. The pin groove at the bottom of the upper punch precisely positions the pin, while the positioning pin inserted at the bottom of the lower punch, in conjunction with a spring, stably supports and positions the lower support. This allows the pin to be accurately pressed into the preset position of the lower support, effectively avoiding inconsistent pin pressing depth and positional deviation, thus improving the stability and consistency of product quality.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a lower support pressing pin tooling, including a frame assembly, a stamping mechanism fixed at the upper end of the frame assembly, the stamping mechanism including a fixed frame, a driving assembly at the upper end of the fixed frame, and a punching die assembly at the middle of the fixed frame;

[0008] The die assembly includes a lower die base, a limiting platform fixed to the upper part of the lower die base, guide rods movably connected to both sides of the limiting platform, an upper die base fixed to the top of the guide rods, a lower punch embedded in the upper end of the lower die base, an upper punch embedded in the lower end of the upper die base, a positioning pin inserted into the bottom of the lower punch, and a spring connected to the bottom of the positioning pin.

[0009] Preferably, the bottom of the upper punch is provided with a pin groove.

[0010] Preferably, the lower punch is higher than the lower die base surface.

[0011] Preferably, the drive assembly includes a base, and the top of the base is provided with a lower mold fixing plate, a middle mold fixing plate and an upper mold fixing plate in sequence. A stamping cylinder is fixed on the upper part of the upper mold fixing plate, and a guide post is provided through the lower mold fixing plate and the upper mold fixing plate.

[0012] Preferably, a stamping connector is fixed to the end of the output shaft of the stamping cylinder, and the stamping connector is fixedly connected to the middle die fixing plate.

[0013] Preferably, the punching die assembly is fixedly connected to the lower die fixing plate.

[0014] Preferably, a limit rod is provided between the lower mold fixing plate and the middle mold fixing plate.

[0015] (III) Beneficial Effects

[0016] The purpose of this invention is to provide a lower support pressing pin fixture. In the die assembly design, a fixed limiting platform on the lower die base and guide rods movable on both sides form a precise guiding system, ensuring accurate trajectory of the upper die base during movement, thereby enabling precise alignment of the upper and lower punches. A specially designed pin groove at the bottom of the upper punch precisely matches the pin size, allowing for accurate pin positioning with minimal error. The positioning pin at the bottom of the lower punch, supported by a spring, tightly fits the lower support, providing not only stable support but also precise positioning of the lower support. This series of designs effectively avoids problems such as inconsistent pin pressing depth and positional deviation, allowing the pressing pin accuracy to be controlled within a very small tolerance range, greatly ensuring the stability and consistency of product quality, and making the produced lower support more reliable in subsequent use. Furthermore, the reasonable structural layout reduces safety hazards such as component shaking and detachment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the entire present invention.

[0018] Figure 2 This is a schematic diagram of the stamping mechanism in this utility model.

[0019] Figure 3 This is a schematic diagram of the punching die assembly in this utility model.

[0020] Figure 4 This is a cross-sectional view of the punching die assembly in this utility model.

[0021] Figure 5 In this utility model Figure 4 Enlarged view of part A of the die assembly.

[0022] In the diagram: 1-Frame assembly, 2-Pressing mechanism, 21-Fixed frame, 22-Drive assembly, 23-Pressing die assembly, 221-Base, 222-Lower die fixing plate, 223-Middle die fixing plate, 224-Upper die fixing plate, 225-Pressing cylinder, 226-Guide post, 227-Pressing connector, 228-Limiting rod, 231-Lower die base, 232-Limiting platform, 233-Guide rod, 234-Upper die base, 235-Lower punch, 236-Upper punch, 237-Positioning pin, 238-Spring, 2361-Pin groove, M-Workpiece. Detailed Implementation

[0023] The following will refer to the appendix in the example of this utility model. Figures 1-5The technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] A lower support pin pressing fixture includes a frame assembly 1. A stamping mechanism 2 is fixed to the upper end of the frame assembly 1. The stamping mechanism 2 includes a fixed frame 21, a drive assembly 22 at the upper end of the fixed frame 21, and a die assembly 23 in the middle of the fixed frame 21. The frame assembly 1 is the basic support structure of the entire fixture, providing a stable mounting platform for other components. It ensures that the stamping mechanism, die assembly, and other components maintain a relatively fixed position during operation, bears the weight of each component and the forces generated during operation, ensures the stability of the entire fixture, and allows the pin pressing operation to be carried out in a stable environment. The stamping mechanism 2 is the power source for realizing the pin pressing action. Through the coordinated work of its internal components, it transmits power to the die assembly to complete the pin pressing operation on the lower support. Its existence transforms the pin pressing process from traditional manual operation to automated operation, greatly improving production efficiency. The fixed frame 21 plays a supporting and connecting role in the stamping mechanism 2. The drive assembly 22 provides power to the entire pin pressing fixture. The die assembly 23 is the key part that directly performs the pressing operation on the lower support and the pin. Through precise design and the coordination of various components, it achieves accurate positioning of the pin and the action of pressing it into the lower bracket, ensuring the quality and precision of the pressing pin.

[0025] The punch assembly 23 includes a lower die base 231, a limiting stage 232 is fixed on the upper part of the lower die base 231, guide rods 233 are movably connected to both sides of the limiting stage 232, an upper die base 234 is fixed on the top of the guide rods 233, a lower punch 235 is embedded in the upper end of the lower die base 231, an upper punch 236 is embedded in the lower end of the upper die base 234, a positioning pin 237 is inserted into the bottom of the lower punch 235, and a spring 238 is connected to the bottom of the positioning pin 237.

[0026] The lower die holder 231 serves as the basic support component of the stamping die assembly 23, playing a crucial role in supporting and securing other components. It provides a mounting base for the limiting table 232, the lower punch 235, and other components, ensuring their stable position during operation and guaranteeing accurate pin-pressing operation of the entire stamping die assembly. The limiting table 232 is fixed to the upper part of the lower die holder 231. Its main function is to limit the movement of the upper die holder 234, preventing damage to the workpiece. Guide rods 233 are movably connected to both sides of the limiting table 232 and fix the upper die holder 234 at the top. Guide rods 233 provide precise guidance for the up-and-down movement of the upper die holder 234, ensuring it moves along a predetermined straight trajectory during stamping, preventing wobbling or deviation, and ensuring that the upper punch 236 accurately engages with the lower punch 235 for precise pin-pressing. The upper die holder 234 serves as the mounting carrier for the upper punch 236, firmly fixing the upper punch 236 in a suitable position. Under the action of the drive assembly 22, the upper die holder 234 drives the upper punch 236 to move up and down, transmitting the power generated by the stamping cylinder 225 to the upper punch 236, enabling it to perform stamping operations on the pin and the lower support. The lower punch 235 is embedded in the upper end of the lower die holder 231, directly participating in the pressing work of the lower support and the pin. Its design, higher than the table surface of the lower die holder 231, allows the lower punch 235 to better contact the lower support and provides stable support and positioning for the lower support during the stamping process. Working in conjunction with the upper punch 236, it accurately presses the pin into the lower support. The upper punch 236 is embedded in the lower end of the upper die holder 234 and is a key component that directly acts on the pin. The pin groove 2361 at its bottom precisely matches the shape and size of the pin, accurately fitting the pin during stamping and positioning it precisely. Then, under the action of stamping power, the pin is pressed into the lower bracket, ensuring the accuracy and quality of the pin pressing. The positioning pin 237 is inserted into the bottom of the lower punch 235. The positioning pin 237 is mainly used to position the lower bracket. When placing the lower bracket, the positioning pin 237 can accurately insert into the positioning hole of the lower bracket, ensuring the lower bracket's accurate position during the pin pressing process and preventing displacement, thus ensuring the pin is accurately pressed into the predetermined position of the lower bracket. A spring 238 is connected to the bottom of the positioning pin 237, serving as an elastic buffer and automatic reset mechanism. During the pin pressing process, when subjected to external force, the spring 238 is compressed, providing a buffering effect and preventing damage to the positioning pin 237 due to excessive impact. Simultaneously, after the pin pressing is completed, the spring 238 allows the positioning pin 237 to automatically reset, preparing for the next pin pressing operation.

[0027] The bottom of the upper punch 236 is provided with a pin groove 2361. The pin groove 2361 is precisely matched with the shape and size of the pin. During the pressing process, it can accurately fit the pin, providing a stable positioning for the pin and ensuring that the pin is fixed in position during the stamping process. This allows the pin to be accurately pressed into the lower bracket, greatly ensuring the accuracy of the pressing.

[0028] The lower punch 235 is higher than the lower die holder 231, allowing it to contact the lower support more directly and effectively. During the stamping operation, it provides stable and reliable support for the lower support, and together with the upper punch 236, they precisely press the pin into the lower support, ensuring the smooth progress of the pin pressing operation.

[0029] The drive assembly 22 includes a base 221. A lower die fixing plate 222, a middle die fixing plate 223, and an upper die fixing plate 224 are sequentially arranged on the top of the base 221. A stamping cylinder 225 is fixed to the upper part of the upper die fixing plate 224. A guide post 226 passes through the lower die fixing plate 222 and the upper die fixing plate 224. A stamping connector 227 is fixed to the end of the output shaft of the stamping cylinder 225, and the stamping connector 227 is fixedly connected to the middle die fixing plate 223. The stamping die assembly 23 is fixedly connected to the lower die fixing plate 222. A limit rod 228 is provided between the lower die fixing plate 222 and the middle die fixing plate 223.

[0030] The base 221 serves as the basic support component of the drive assembly 22, providing a stable mounting platform for other components. The main function of the lower die fixing plate 222 is to fix the lower die holder 231 in the die assembly 23, ensuring a stable connection between the die assembly 23 and the drive assembly 22. It tightly integrates the die assembly 23 and the drive assembly 22, ensuring that the die assembly 23 accurately receives power from the drive assembly 22 during the stamping process, thus achieving the stamping operation on the bearing. The middle die fixing plate 223 plays a connecting and transmission role in the drive assembly. It is connected to the output shaft end of the stamping cylinder 225 via the stamping connector 227, receiving power generated by the stamping cylinder 225. Simultaneously, it cooperates with the upper die fixing plate 224 and the lower die fixing plate 222, and under the guidance of the guide post 226, drives the upper die holder 234 to move up and down, thereby realizing the stamping action of the die assembly 23. The upper die fixing plate 224 is mainly used to fix the stamping cylinder 225, stably mounting the stamping cylinder 225 above the drive assembly. It is connected to the middle die fixing plate 223 and the lower die fixing plate 222 via guide pillars 226. During the stamping process, together with the middle die fixing plate 223, it ensures the stability and accuracy of the movement of the upper die holder 234, ensuring that the upper punch 235 can accurately stamp the bearing. The stamping cylinder 225 is the power source of the drive assembly 22, generating power through the extension and retraction of its output shaft. During operation, the output shaft of the stamping cylinder 225 extends, driving the middle die fixing plate 223 downwards via the stamping connector 227, thereby causing the upper die holder 234 and the upper punch 235 to press downwards, completing the press-fitting operation of the bearing. After stamping is completed, the output shaft of the stamping cylinder 225 retracts, resetting related components and preparing for the next stamping operation. A guide post 226 is disposed between the lower die fixing plate 222 and the upper die fixing plate 224. Its main function is to provide precise guidance for the up-and-down movement of the upper die fixing plate 224 and the middle die fixing plate 223. During the stamping process, the guide post 226 ensures that the middle die fixing plate 223 and the upper die fixing plate 224 can move up and down along a fixed trajectory, ensuring the coaxiality of the upper punch 235 and the lower punch 236, and improving the accuracy and reliability of stamping. The stamping connector 227 connects the output shaft of the stamping cylinder 225 and the middle die fixing plate 223. It effectively transmits the power generated by the stamping cylinder 225 to the middle die fixing plate 223, enabling the middle die fixing plate 223 to move under the drive of the stamping cylinder 225, thereby driving the stamping die assembly 23 to complete the stamping operation. A limit rod 228 is disposed between the lower die fixing plate 222 and the middle die fixing plate 223. Its function is to limit the range of motion of the middle die fixing plate 223. During the stamping process, when the stamping cylinder 225 drives the middle die fixing plate 223 to move downward, the limit rod 228 can prevent the middle die fixing plate 223 from moving downward excessively, thus avoiding damage to the tooling parts and ensuring the safety and stability of the stamping operation.

[0031] Working principle:

[0032] First, the operator places the pre-assembled lower support onto the lower punch 235. At this time, the positioning pin 237 at the bottom of the lower punch 235 will insert into the positioning hole of the lower support. Under the action of the spring 238, the positioning pin 237 tightly fixes the lower support, ensuring its accurate position. At the same time, the design of the lower punch 235 being higher than the platform of the lower die base 231 allows the lower support to be stably supported.

[0033] After preparation, the stamping mechanism 2 is started. The drive assembly 22 in the stamping mechanism 2 begins to work, and the stamping cylinder 225 generates power, which drives the middle die fixing plate 223 through the stamping connector 227. This causes the upper die fixing plate 224 and the connected upper die holder 234 to move downward under the guidance of the guide rod 233. The guide rod 233 is movably connected to both sides of the limiting table 232. The limiting table 232 provides precise limiting and guidance for the guide rod 233, ensuring the accurate movement trajectory of the upper die holder 234. The upper die holder 234 drives the upper punch 236 to move downward. The upper punch 236 acts on the pin, pressing the pin towards the lower support. The lower punch 235 provides stable support for the lower support from below and works in conjunction with the upper punch 236 to accurately press the pin into the lower support.

[0034] After the pin is pressed, the output shaft of the stamping cylinder 225 retracts, driving the upper die holder 234, upper punch 236, and other components to reset, preparing for the next pin pressing operation. This cycle repeats, achieving efficient and precise pin pressing operations on the lower support.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lower bracket pressing pin tooling, characterized in that, The frame assembly (1) is included, and a stamping mechanism (2) is fixed at the upper end of the frame assembly (1). The stamping mechanism (2) includes a fixed frame (21), a drive assembly (22) is provided at the upper end of the fixed frame (21), and a die assembly (23) is provided in the middle of the fixed frame (21). The die assembly (23) includes a lower die base (231), a limiting platform (232) is fixed on the upper part of the lower die base (231), guide rods (233) are movably connected to both sides of the limiting platform (232), an upper die base (234) is fixed on the top of the guide rods (233), a lower punch (235) is embedded in the upper end of the lower die base (231), an upper punch (236) is embedded in the lower end of the upper die base (234), a positioning pin (237) is inserted into the bottom of the lower punch (235), and a spring (238) is connected to the bottom of the positioning pin (237).

2. The lower bracket pressing pin fixture according to claim 1, characterized in that, The bottom of the upper punch (236) is provided with a pin groove (2361).

3. The lower bracket pressing pin fixture according to claim 1, characterized in that, The lower punch (235) is higher than the lower die base (231) platform.

4. The lower bracket pressing pin fixture according to claim 1, characterized in that, The drive assembly (22) includes a base (221), and the top of the base (221) is provided with a lower mold fixing plate (222), a middle mold fixing plate (223) and an upper mold fixing plate (224) in sequence. A stamping cylinder (225) is fixed on the upper part of the upper mold fixing plate (224), and a guide post (226) is provided through the lower mold fixing plate (222) and the upper mold fixing plate (224).

5. The lower bracket pressing pin fixture according to claim 4, characterized in that, The output shaft end of the stamping cylinder (225) is fixed with a stamping connector (227), which is fixedly connected to the middle mold fixing plate (223).

6. The lower bracket pressing pin fixture according to claim 1, characterized in that, The punching die assembly (23) is fixedly connected to the lower die fixing plate (222).

7. The lower bracket pressing pin fixture according to claim 4, characterized in that, A limit rod (228) is provided between the lower mold fixing plate (222) and the middle mold fixing plate (223).

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