Processing tool for switch base

Abstract

The utility model relates to mechanical processing technical field, concretely discloses a machining frock for switch seat, including bottom plate, be provided with lifting frame on the bottom plate, rotatable screw rod is installed on the lifting frame, be provided with the drive mechanism for driving screw rod rotation on the lifting frame, the screw rod is connected with the pressing fixed establishment for pressing fixed switch seat down thread, be provided with the fine adjustment mechanism for adjusting the pressing angle between switch seat down on the pressing fixed establishment, solved the technical problem that the clamping operation is complicated, the production efficiency is low because of must change different pressing plate and manual auxiliary support to adapt switch seat spare different processing surface.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, and specifically discloses a machining fixture for switch holders. Background Technology

[0002] In the field of machining, fixtures are key process equipment used to accurately position and reliably clamp workpieces onto the machine tool table. For parts with stepped cylindrical structures, such as switch seats, special base plate fixtures are commonly used to ensure machining accuracy and efficiency when performing milling, drilling and other processes. These fixtures usually integrate a positioning system consisting of positioning pins and support blocks, as well as a mechanical clamping system that uses bolts, nuts and pressure plates. They are the basic means to achieve efficient and stable production at present.

[0003] Given the structural characteristics of the switch base component, which has a cylindrical upper end and a flanged lower end, the machining process places specific requirements on the clamping method. To avoid machining the upper end face of the cylinder in this area, the clamping force must be applied to the lower flange. However, when machining the periphery of the flange, the upper end face of the cylinder must be directly clamped. To meet these two sequential machining requirements, existing technologies generally use two independent clamping plate mechanisms for switching, such as Y-shaped clamping plates or long plate clamping plates. However, this solution has significant convenience issues in actual production operations. When changing production, the machine must be stopped and cumbersome tooling changes and adjustments must be made. Operators need to frequently disassemble and assemble bolts and clamping plates, and manually add shims to help stabilize the clamping plates. These repetitive manual operations are not only labor-intensive and slow-paced, becoming a bottleneck to improving overall production efficiency, but also prone to human error due to the complexity of the operation steps. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a machining fixture for switch bases, so as to solve the technical problem of cumbersome clamping operations and low production efficiency caused by the need to change different pressure plates and manual auxiliary supports to adapt to different machining surfaces of switch base parts.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a machining fixture for a switch base, including a base plate, a lifting frame on the base plate, a rotatable screw mounted on the lifting frame, a driving mechanism for driving the screw to rotate on the lifting frame, a pressing and fixing mechanism for pressing down and fixing the switch base threadedly connected to the screw, and a fine-tuning mechanism for adjusting the pressing angle between the pressing mechanism and the switch base.

[0006] In this solution, the efficient coordination of the drive mechanism, the pressing and fixing mechanism, and the fine-tuning mechanism enables rapid, stable, and precise clamping and fixing of the switch base. The operator can efficiently drive the screw to rotate via the drive mechanism, utilizing the smoothness and self-locking properties of the threaded transmission to precisely convert the rotational motion into the linear motion of the lifting plate. This synchronously drives the entire pressing and fixing mechanism to move stably downwards, applying the clamping force evenly to the switch base. This effectively avoids skewing and shaking during the clamping process, ensuring the reliability of the clamping. Before or during clamping, the fixing angle can be adjusted at any time via the fine-tuning mechanism, ensuring that the bayonet end or clamping end perfectly matches the contours of different parts of the switch base. This allows for rapid switching between two different clamping modes on a single tooling. Compared to existing technologies that require stopping the machine and replacing the entire pressure plate assembly, or even manual padding, this device significantly reduces changeover time and operator workload. Furthermore, through mechanical linkage and self-locking design, it ensures high precision and efficiency in the processing.

[0007] Furthermore, the driving mechanism includes a first bevel gear, which is fixedly connected to the screw, and a rotatable first shaft is provided on the lifting frame, on which a second bevel gear meshing with the first bevel gear is fixedly connected.

[0008] In this solution, the right-angle meshing transmission between the first and second bevel gears efficiently converts the rotational motion on the horizontal shaft into the rotational motion of the vertical screw, improving the ease of operation and transmission performance of the tooling. Compared with the existing devices that directly rotate the screw manually or use a simple lever mechanism, the transmission between the first and second bevel gears has the effect of multiplying the operating torque, allowing the operator to generate a large screw locking torque with only a small force, greatly reducing labor intensity. At the same time, the gear transmission is smooth and reliable, eliminating the lateral force and shaking that may be generated by direct drive, ensuring that the lifting plate can be pressed down vertically and accurately along the guide rod, thereby applying the clamping force evenly and vertically to the switch base, greatly improving the stability of clamping and the processing positioning accuracy. Compared with the traditional method, the transmission efficiency is improved by using the first and second bevel gears.

[0009] Furthermore, the pressing and fixing mechanism includes a lifting plate, which is threadedly connected to the screw. A guide rod is provided between the lifting plate and the lifting frame. The lifting plate is slidably connected to the guide rod. A rotating groove is provided on the lifting plate, and a Y-shaped pressure plate for contacting the switch base is installed in the rotating groove.

[0010] In this solution, the rotary drive is precisely converted into a smooth vertical linear motion through the precision threaded pair formed by the screw and the lifting plate, thereby achieving precise and controllable adjustment of the lifting height of the Y-shaped pressure plate and the final clamping force.

[0011] Furthermore, the fine-tuning mechanism includes a second rotating shaft, one end of which is rotatably connected to the lifting plate, and the other end of which passes through the Y-shaped pressure plate and the lifting plate in sequence.

[0012] In this solution, the Y-shaped pressure plate rotates within a rotating groove via a second rotating shaft, enabling flexible and precise adjustment of the Y-shaped pressure plate's clamping angle. Compared to the cumbersome operation of existing devices that require complete disassembly and replacement of different types of pressure plates to adapt to different processing surfaces, the rotation via the second rotating shaft eliminates the need for any disassembly steps. The operator can directly and manually rotate the Y-shaped pressure plate to quickly and accurately align its "jamming end" or "clamping end" with the flange below the switch base to be clamped or the upper end face of the cylinder. This allows for the instantaneous switching between two clamping modes on a single tooling set, avoiding the time wasted and parts management burden caused by changing pressure plates. It also reduces the decrease in positioning accuracy and safety hazards caused by incorrect parts replacement or improper tightening. Furthermore, the second rotating shaft has a simple and reliable structure with strong load-bearing capacity. Under clamping conditions, it can effectively transmit torque and maintain angle stability, ensuring the rigidity requirements of the clamping process.

[0013] Furthermore, the fine-tuning mechanism also includes a sliding frame, which is fixedly connected to the upper surface of the lifting plate. A slidable slider is provided inside the sliding frame, and a spring is also provided inside the sliding frame. One end of the spring is fixedly connected to the inner wall of the sliding frame, and the other end of the spring is fixedly connected to the slider. A fixing plate is fixedly connected to the slider, and a gear rail that meshes with the gear is provided on the fixing plate.

[0014] In this solution, a simple horizontal pulling operation compresses the spring of the slider, causing the toothed rail and gear on the fixed plate to disengage, thus completely releasing the second rotating shaft. This allows the Y-shaped pressure plate to rotate freely to any desired angle. After release, the spring automatically pushes the slider back to its original position, ensuring that the toothed rail and gear instantly and precisely re-engage, firmly locking the second rotating shaft. This effectively resists torsional torque and vibration impact during processing, ensuring the stability of the clamping state. It solves the inherent drawbacks of traditional methods, such as time-consuming and labor-intensive adjustment, reliance on operator experience for locking reliability, and the risk of accidental loosening. It achieves quick and precise operation of "adjust with one pull, lock with one release," requiring no additional tools and improving the adjustment efficiency of the Y-shaped pressure plate.

[0015] The working principle and beneficial effects of this solution are as follows: During operation, the switch base is first positioned on the base plate. Then, the rotating rod is rotated clockwise. This rotational motion is transmitted to the screw through the meshing of the second and first bevel gears, ultimately driving the screw to rotate and causing the lifting plate to smoothly press down along the guide rod. This causes the Y-shaped pressure plate to press against the switch base flange. When adjusting the angle of the Y-shaped pressure plate, the pull rod is pulled to disengage the slider compression spring, gear rail, and gear. The Y-shaped pressure plate can then be manually rotated to the desired angle. After release, the spring pushes the gear rail to reset and lock. When machining the upper cylindrical surface of the switch base, the switch base flange is directly pressed against it. When machining the periphery of the flange, the Y-shaped pressure plate is rotated 180° so that its pressing end presses against the upper cylindrical surface. After machining the switch base, rotating the screw counterclockwise releases the switch base. This solves the technical problem of cumbersome clamping operations and low production efficiency caused by the need to change different pressure plates and manually assist in the machining of different switch base surfaces. Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment; Figure 2 An exploded view of the fine-tuning mechanism in the embodiment; Figure 3 This is a schematic diagram of the lifting plate and guide rod in an embodiment.

[0017] The following components are labeled in the attached diagram: base plate 1, lifting frame 2, screw 3, first bevel gear 4, first rotating shaft 5, second bevel gear 6, rotating disk 7, rotating rod 8, lifting plate 9, guide rod 10, Y-shaped pressure plate 11, bayonet end 12, pressing end 13, second rotating shaft 14, gear 15, sliding frame 16, slider 17, spring 18, fixing plate 19, pull rod 20, gear rail 21, rotating groove 22. Detailed Implementation

[0018] The following detailed description illustrates the specific implementation method: Example

[0019] like Figures 1 to 3As shown, a machining fixture for a switch base is disclosed, including a base plate 1, a lifting frame 2, a screw 3, a drive mechanism, a pressing and fixing mechanism, and a fine-tuning mechanism. The lifting frame 2 is mounted on the base plate 1, and the screw 3 is provided on the lifting frame 2. One end of the screw 3 is rotatably connected to the lifting frame 2, and the other end of the screw 3 passes through the lifting frame 2. The drive mechanism is provided on the lifting frame 2 to drive the screw 3 to rotate. The pressing and fixing mechanism is threadedly connected to the screw 3 to press and fix the switch base. The fine-tuning mechanism is provided on the pressing and fixing mechanism to adjust the fixed angle between the screw 3 and the switch base.

[0020] like Figure 1 As shown, the drive mechanism includes a first bevel gear 4, a first rotating shaft 5, a second bevel gear 6, a rotating disk 7, and a rotating rod 8. The first bevel gear 4 is fixedly connected to the upper end face of the screw 3. The first rotating shaft 5 is installed at the end of the lifting frame 2 near the first bevel gear 4. The first rotating shaft 5 is rotatably connected to the lifting frame 2. The second bevel gear 6 is fixedly connected to the first rotating shaft 5 and meshes with the first bevel gear 4. The rotating disk 7 is fixedly connected to the end of the first rotating shaft 5 away from the second bevel gear 6. The rotating rod 8 is rotatably connected to the rotating disk 7.

[0021] like Figure 1 and Figure 3 As shown, the pressing and fixing mechanism includes a lifting plate 9, a guide rod 10, and a Y-shaped pressure plate 11. The lifting plate 9 is threadedly connected to the screw 3. The side of the lifting plate 9 near the lifting frame 2 forms a sliding fit with the lifting frame 2. The guide rod 10 is provided between the lifting frame 2 and the lifting plate 9. The lifting plate 9 is slidably connected to the guide rod 10. A rotating groove 22 is opened at the end of the lifting plate 9 away from the guide rod 10. The Y-shaped pressure plate 11 is installed in the rotating groove 22. The Y-shaped pressure plate 11 can contact the switch base. The Y-shaped pressure plate 11 includes a bayonet end 12 and a pressing end 13.

[0022] like Figure 2 As shown, the fine-tuning mechanism includes a second rotating shaft 14, a gear 15, a sliding frame 16, a slider 17, a spring 18, a fixed plate 19, and a pull rod 20. One end of the second rotating shaft 14 is rotatably connected to the lifting plate 9, and the other end of the second rotating shaft 14 passes through the Y-shaped pressure plate 11 and the lifting plate 9 in sequence. The second rotating shaft 14 is fixedly connected to the Y-shaped pressure plate 11. A gear 15 is fixedly connected to one end of the second rotating shaft 14 that passes through the lifting plate 9. A sliding frame 16 is fixedly connected to the upper surface of the lifting plate 9, and a slider 17 is slidably arranged inside the sliding frame 16. 7. A spring 18 is also provided inside the slide frame 16. One end of the spring 18 is fixedly connected to the inner wall of the slide frame 16, and the other end of the spring 18 is fixedly connected to the slider 17. A fixing plate 19 is fixedly connected to the end of the slider 17 away from the spring 18. A toothed rail 21 is provided on the fixing plate 19. The toothed rail 21 meshes with the gear 15. A pull rod 20 is provided at the end of the fixing plate 19 away from the gear 15. One end of the pull rod 20 is fixedly connected to the fixing plate 19, and the other end of the pull rod 20 passes through the center hole of the spring 18 and the slide frame 16 in sequence.

[0023] In practice When the switch base needs to be processed, the switch base is first placed on the base plate 1. Then the operator rotates the rotating rod 8 clockwise, which drives the rotating disk 7 connected to it to rotate. The rotating disk 7 drives the first rotating shaft 5 to rotate. The first rotating shaft 5 drives the second bevel gear 6 to rotate synchronously. The second bevel gear 6 drives the first bevel gear 4, which meshes with it, to rotate. The first bevel gear 4 is coaxially connected to the screw 3, thereby transmitting the rotational motion to the screw 3.

[0024] When the screw 3 rotates, the lifting plate 9, which is connected to it by a threaded pair, moves along the screw 3 toward one end of the switch seat under the drive of the thread. One side of the lifting plate 9 is guided by the lifting frame 2 through a sliding fit, and at the same time forms a sliding connection with the guide rod 10, thereby ensuring that the lifting process is smooth and without deflection. When the lifting plate 9 descends, the Y-shaped pressure plate 11 at its end, which is hinged through the rotating groove 22, also moves downwards. At this time, the "jaw end 12" of the Y-shaped pressure plate 11 presses against the flange below the switch seat to achieve clamping.

[0025] During the clamping process, if the angle of the Y-shaped pressure plate 11 needs to be adjusted, the pull rod 20 can be pulled outward, causing the slider 17 to slide away from the gear 15 within the slide frame 16. Simultaneously, the spring 18 within the slide frame 16 is compressed to store energy. As the slider 17 moves, it causes the fixed plate 19 fixed to it to move together, disengaging the gear 15 on the fixed plate 19 from the gear 15 mounted on the second rotating shaft 14. At this point, the gear 15 is released from its constraint, and the operator can manually rotate the Y-shaped pressure plate 11, allowing it to rotate freely within the rotating groove 22 via the second rotating shaft 14. After adjusting to the desired angle... Release the lever 20, the compressed spring 18 releases energy, pushes the slider 17 and the fixing plate 19 to reset, the gear 21 re-engages with the gear 15, and locks the Y-shaped pressure plate 11 in this position. Finally, continue to rotate the rotating rod 8 clockwise, and drive the screw 3 through the first bevel gear 4 and the second bevel gear 6 to further drive the Y-shaped pressure plate 11 to press down, so that the bayonet end 12 of the Y-shaped pressure plate 11 stably presses the switch seat flange. Due to the self-locking characteristics of the transmission pair between the first bevel gear 4 and the second bevel gear 6 and the screw 3, the pressing state can be reliably maintained. At this time, the upper end of the cylinder of the switch seat can be machined.

[0026] When machining the periphery of the switch seat flange is required, the Y-shaped pressure plate 11 should be rotated 180° so that its "clamping end 13" faces the switch seat. First, pull the pull rod 20 to disengage the gear 21 from the gear 15. Then, rotate the Y-shaped pressure plate 11 180° to adjust the clamping end 13 to an angle that can fully fit with the upper end surface of the switch seat cylinder. Release the pull rod 20, and the gear 21 will re-engage and lock the gear 15. Finally, rotate the rotating rod 8 clockwise to drive the Y-shaped pressure plate 11 to move down, so that its clamping end 13 directly presses against the upper end surface of the switch seat cylinder, and machining of the periphery of the flange can begin.

[0027] After processing, the first rotating shaft 5 is rotated counterclockwise, and the screw 3 is reversed through the transmission of the first bevel gear 4 and the second bevel gear 6. This drives the lifting plate 9 and the Y-shaped pressure plate 11 to rise together, thereby releasing the pressure on the switch seat and taking out the processed switch seat.

[0028] The above description is merely an embodiment of this utility model, and common knowledge such as specific structures and characteristics in the solution is not described in detail here. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model, and these should also be considered within the protection scope of this utility model. These modifications and improvements will not affect the effectiveness of the implementation of this utility model or its practicality.

Claims

1. A machining fixture for switch holders, characterized in that: The device includes a base plate, on which a lifting frame is provided. A rotatable screw is mounted on the lifting frame. A drive mechanism for driving the screw to rotate is provided on the lifting frame. A pressing and fixing mechanism for pressing down and fixing the switch base is threadedly connected to the screw. A fine-tuning mechanism for adjusting the pressing angle between the pressing mechanism and the switch base is provided on the pressing and fixing mechanism.

2. The machining fixture for a switch holder according to claim 1, characterized in that: The driving mechanism includes a first bevel gear, which is fixedly connected to the screw. The lifting frame is provided with a rotatable first shaft, and a second bevel gear that meshes with the first bevel gear is fixedly connected to the first shaft.

3. The machining fixture for a switch holder according to claim 1, characterized in that: The pressing and fixing mechanism includes a lifting plate, which is threadedly connected to the screw. A guide rod is provided between the lifting plate and the lifting frame. The lifting plate is slidably connected to the guide rod. A rotating groove is provided on the lifting plate, and a Y-shaped pressure plate for contacting the switch base is installed in the rotating groove.

4. The machining fixture for a switch holder according to claim 1, characterized in that: The fine-tuning mechanism includes a second rotating shaft, one end of which is rotatably connected to the lifting plate, and the other end of which passes through the Y-shaped pressure plate and the lifting plate in sequence.

5. The machining fixture for a switch holder according to claim 4, characterized in that: The fine-tuning mechanism also includes a sliding frame, which is fixedly connected to the upper surface of the lifting plate. A slidable slider is provided inside the sliding frame, and a spring is also provided inside the sliding frame. One end of the spring is fixedly connected to the inner wall of the sliding frame, and the other end of the spring is fixedly connected to the slider. A fixing plate is fixedly connected to the slider, and a gear rail that meshes with a gear is provided on the fixing plate.

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