Anti-falling positioning clamp for machining elastic cylindrical pin

Abstract

The utility model discloses an anti-falling positioning fixture for processing an elastic cylindrical pin, which relates to the technical field of processing of elastic cylindrical pins, and is characterized in that the anti-falling positioning fixture for processing the elastic cylindrical pin comprises a processing workbench, an embedding groove is formed in the middle of the processing workbench, and the elastic cylindrical pin is arranged in the embedding groove. The speed reduction driving assembly can drive the driving disc to rotate, and the driving disc can drive the rack to horizontally move in the direction close to or away from the circle center through vortex-shaped teeth on the top of the driving disc; when the driving disc rotates, the V-shaped movable clamp is driven to be close to or away from the fixed clamp, the elastic cylindrical pin can be clamped in four lines, clamping is stable, the servo motor is locked after clamping is stable, and when the driving disc does not move, due to the fact that the driving disc is meshed with a plurality of racks at the same time through vortex-shaped teeth at the top of the driving disc, the racks are all stressed, and the anti-loosening performance is excellent.

Description

Technical Field

[0001] This utility model relates to the field of elastic cylindrical pin processing technology, and more specifically, it relates to a positioning fixture for processing elastic cylindrical pins to prevent them from falling off. Background Technology

[0002] A flexible cylindrical pin, also known as a spring pin, is a headless, hollow cylindrical body with axial slots and chamfered ends. It is used for positioning, connecting, and fixing parts. The machining of flexible cylindrical pins includes processes such as milling and grinding. In the machining process of flexible cylindrical pins, it is very important to use positioning fixtures to ensure the accurate positioning and fixing of the workpiece.

[0003] Positioning fixtures for machining flexible cylindrical pins include single-station positioning fixtures and multi-station positioning fixtures. The multi-station positioning fixture can process multiple workpieces simultaneously, significantly improving production efficiency. Chinese utility model application number CN202120785438.0 discloses a locking device for machining cylindrical pins. It uses several interlocking arc-shaped plates installed in a linear equidistant array on the opposite surfaces of a fixed plate and a sliding plate. The cylindrical pin is clamped by the interlocking of the arc-shaped plates, and the clamping force is provided by the support component in the middle of the back of the sliding plate.

[0004] Although the locking device for processing cylindrical pins disclosed in the aforementioned patent can process multiple workpieces at the same time, the multi-station clamps are arranged in a straight line at equal intervals and the clamping force is provided by the support component at the center. The end support is insufficient, which can easily cause the elastic cylindrical pins clamped at the end to sag or move during the processing. In addition, the cylindrical pins are clamped by the arc plates in pairs, which can only clamp the elastic cylindrical pins that are compatible with its inner arc, resulting in poor versatility.

[0005] Therefore, in order to solve the above-mentioned technical problems, this application proposes a positioning fixture for machining elastic cylindrical pins that prevents them from falling off. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a positioning fixture for machining elastic cylindrical pins that prevents them from falling off, so as to solve the technical problem that the existing multi-station positioning fixtures for machining elastic cylindrical pins have poor functionality.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a positioning fixture for machining an anti-detachment elastic cylindrical pin, comprising a machining worktable, an embedding groove in the center of the machining worktable, and a plurality of sliding grooves equidistantly arranged around the embedding groove on the machining worktable. A four-line positioning fixture is mounted on the machining worktable, the four-line positioning fixture comprising a fixed clamp embedded in the machining worktable, the fixed clamp comprising a fixed clamp, a movable clamp external to the fixed clamp, and a speed reduction drive assembly connected to the power input end of the movable clamp.

[0008] The moving clamp includes an active disk rotatably mounted on the lower part of the machining worktable. The active disk is fixedly mounted with a spiral tooth and a number of racks are meshed and connected in a circumferentially equidistant array through the spiral tooth. The top of the racks is fixedly connected to a movable clamp through a connecting rod, and the connecting rod is slidably connected in a slide groove.

[0009] Both the fixed clamp and the movable clamp have a "V" shaped cross section, and the movable clamp can be matched with the fixed clamp with their open ends facing each other.

[0010] Preferably, a scale is installed on the processing worktable, and the scale corresponds to the slide groove and is installed at the edge of the slide groove.

[0011] Preferably, the fixed clamp further includes a mounting plate, which is embedded and fixedly installed in the embedding groove of the machining worktable, and the top of the mounting plate is fixedly installed with a plurality of fixed clamps with outward openings in a circumferentially equidistant array.

[0012] Preferably, a number of slides are fixedly installed on the lower part of the processing workbench, and a rack is slidably connected to the inner side wall of the slide through a side groove, the side groove being formed on both sides of the rack.

[0013] Preferably, a first gear is coaxially fixedly mounted under the active disk. The first gear is rotatably connected to the lower part of the processing worktable via a fixing frame. A second gear is externally meshed with the first gear, and the power input end of the second gear is connected to the power output end of a servo motor.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This utility model can drive the active disk to rotate through the deceleration drive component. The active disk can drive the rack to move closer to or away from the center through the vortex teeth on its top. That is, it can drive the "V"-shaped movable clamp to move closer to or away from the fixed clamp. It can clamp the elastic cylindrical pin with four lines, and the clamping is relatively stable. After the clamping is stable, the servo motor is locked. When the active disk is stationary, because the active disk simultaneously engages multiple racks through the vortex teeth on its top, multiple racks are subjected to force, and each movable clamp is subjected to clamping force. The anti-loosening performance is excellent, which solves the problem of poor functionality of the existing multi-station positioning fixtures for processing elastic cylindrical pins.

[0016] 2. In this utility model, both the fixed clamp and the movable clamp have a "V" shaped cross section. The movable clamp can be matched with the fixed clamp and the open ends are set opposite each other. It can clamp different types of elastic cylindrical pins. When clamping, the "V" shaped fixed clamp and movable clamp can contact the elastic cylindrical pin through four lines, and the clamping is stable. This further solves the problem of poor functionality of the existing multi-station positioning fixtures for processing elastic cylindrical pins. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is an exploded structural diagram of the four-line positioning fixture in this utility model;

[0020] Figure 3 for Figure 2 Schematic diagram of the structure at point A;

[0021] Figure 4 This is an exploded structural diagram of the four-line positioning fixture in this utility model.

[0022] 1. Machining worktable; 2. Slide groove; 3. Embedded groove; 4. Scale; 5. Four-line positioning fixture; 6. Fixed clamp; 7. Moving clamp; 8. Reduction drive assembly; 9. Fixture;

[0023] 601. Mounting plate; 602. Fixing clip;

[0024] 701. Drive disc; 702. Spiral tooth; 703. Rack; 704. Connecting rod; 705. Movable clamp; 706. Side groove; 707. Slide;

[0025] 801, First gear; 802, Second gear; 803, Servo motor. Detailed Implementation

[0026] like Figure 1-4 As shown, this utility model provides a positioning fixture for machining elastic cylindrical pins to prevent them from falling off. It includes a machining worktable 1, an embedded groove 3 in the middle of the machining worktable 1, and a plurality of sliding grooves 2 equidistantly arranged around the embedded groove 3 on the machining worktable 1. A scale 4 is installed on the machining worktable 1, which corresponds to the sliding grooves 2 and is installed at the edge of the sliding grooves 2. A four-line positioning fixture 5 is installed on the machining worktable 1. The four-line positioning fixture 5 includes a fixed clamp 6 embedded on the machining worktable 1, a movable clamp 7 outside the fixed clamp 6, and a speed reduction drive assembly 8 connected to the power input end of the movable clamp 7.

[0027] The movable clamp 7 includes an active disk 701 rotatably mounted on the lower part of the machining worktable 1. The active disk 701 is fixedly mounted with a spiral tooth 702 and a number of racks 703 are meshed in a circumferentially equidistant array through the spiral tooth 702. The top of the racks 703 is fixedly connected to a movable clamp 705 through a connecting rod 704. The connecting rod 704 is slidably connected in the slide groove 2.

[0028] Both the fixed clamp 602 and the movable clamp 705 have a "V" shaped cross section. The movable clamp 705 can match the fixed clamp 602 and the open ends are set opposite each other. This utility model can drive the active disk 701 to rotate through the deceleration drive component 8. The active disk 701 can drive the rack 703 to move closer to or away from the center of the circle through the vortex teeth 702 on its top. That is, it can drive the "V" shaped movable clamp 705 to move closer to or away from the fixed clamp 602. It can clamp the elastic cylindrical pin with four lines, and the clamping is relatively stable. After the clamping is stable, the servo motor 803 is locked. When the active disk 701 is stationary, because the active disk 701 simultaneously engages multiple racks 703 through the vortex teeth 702 on its top, multiple racks 703 are subjected to force, and each movable clamp 705 is subjected to clamping force, which has excellent anti-loosening performance.

[0029] Furthermore, the fixed clamp 6 includes a fixing clamp 602 and a mounting plate 601. The mounting plate 601 is embedded and fixedly installed in the embedding groove 3 of the processing worktable 1. The top of the mounting plate 601 is fixedly installed with several fixing clamps 602 with openings facing outward in a circumferentially equidistant array, which facilitates the installation or removal of the fixed clamp 6.

[0030] Furthermore, several sets of slides 707 are fixedly installed on the lower part of the processing worktable 1. A rack 703 is slidably connected to the inner side wall of the slide 707 through a side groove 706. The side groove 706 is opened on both sides of the rack 703. A first gear 801 is coaxially fixedly installed under the drive disc 701. The first gear 801 is rotatably connected to the lower part of the processing worktable 1 through a fixing frame 9. The first gear 801 is externally meshed with a second gear 802. The power input end of the second gear 802 is connected to the power output end of the servo motor 803. The diameter of the first gear 801 is larger than that of the second gear 802. When the servo motor 803 drives the second gear 802 to rotate, the first gear 801 rotates synchronously and relatively slowly, thus reducing speed.

[0031] Working principle: This utility model drives the active disk 701 to rotate via the reduction drive assembly 8. The active disk 701, through its top spiral teeth 702, drives the rack 703 to move closer to or away from the center, thus causing the "V"-shaped movable clamp 705 to move closer to or away from the fixed clamp 602. It can clamp the elastic cylindrical pin with four wires, providing a relatively stable clamping. An external power supply turns on the servo motor 803 via an external switch and controls the servo motor 803 to rotate forward. The servo motor 803 drives... When the second gear 802 rotates clockwise, the first gear 801 rotates synchronously and relatively slowly counterclockwise, reducing speed. Since the driving disc 701 simultaneously engages multiple racks 703 via its top spiral teeth 702, when the first gear 801 and the driving disc 701 rotate counterclockwise, the multiple racks 703 simultaneously translate away from the center. The connecting rod 704 slides outward within the slide groove 2, and the movable clamp 705 translates away from the fixed clamp 602, inserting the elastic cylindrical pins one by one into the movable clamp 705 and... After the fixed clamps 602 are in place, the external power supply controls the servo motor 803 to reverse via an external switch, causing the movable clamp 705 to move closer to the fixed clamps 602. The principle is the same as above; the two clamps work together to securely hold the elastic cylindrical pins. The current position of the movable clamp 705 can be determined by checking the scale 4. After the movable clamp 705 reaches the target position, the servo motor 803 is locked. When the drive disc 701 is stationary, it engages multiple racks 703 simultaneously through the vortex teeth 702 on its top. Multiple racks 703 are subjected to force, and each movable clamp 705 is subjected to clamping force, resulting in excellent anti-loosening performance. The fixed clamp 602 and the movable clamp 705 both have a "V" shaped cross section. The movable clamp 705 can be matched with the fixed clamp 602 and the open ends are set opposite each other, which can clamp different types of elastic cylindrical pins. When clamping, the "V" shaped fixed clamp 602 and movable clamp 705 can contact the elastic cylindrical pin through four lines, resulting in a stable clamping (the servo motor 803 is a self-locking forward and reverse reversing motor, which is an existing product on the market).

[0032] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or equivalent variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are considered equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A positioning fixture for machining elastic cylindrical pins to prevent them from falling off, comprising a machining worktable (1), characterized in that, The machining workbench (1) has an embedded groove (3) in the middle. The machining workbench (1) also has several sliding grooves (2) equidistantly arranged around the embedded groove (3) in a circle. The machining workbench (1) is equipped with a four-line positioning fixture (5). The four-line positioning fixture (5) includes a fixed clamp (6) embedded in the machining workbench (1). The fixed clamp (6) includes a fixed clamp (602). The fixed clamp (6) is provided with a movable clamp (7). The power input end of the movable clamp (7) is connected to a speed reduction drive assembly (8). The moving clamp (7) includes an active disk (701) rotatably mounted on the lower part of the processing worktable (1). The active disk (701) is fixedly mounted with a spiral tooth (702) and a number of racks (703) are meshed in a circumferentially equidistant array through the spiral tooth (702). The top of the rack (703) is fixedly connected to a movable clamp (705) through a connecting rod (704). The connecting rod (704) is slidably connected in the slide groove (2). Both the fixed clamp (602) and the movable clamp (705) have a "V" shaped cross section. The movable clamp (705) can be matched with the fixed clamp (602) and the open ends are set opposite to each other.

2. The positioning fixture for machining an anti-detachment elastic cylindrical pin according to claim 1, characterized in that: A scale (4) is installed on the processing workbench (1). The scale (4) corresponds to the slide (2) and is installed at the edge of the slide (2).

3. The positioning fixture for machining an anti-detachment elastic cylindrical pin according to claim 1, characterized in that: The fixed clamp (6) also includes a mounting plate (601), which is embedded and fixedly installed in the embedding groove (3) of the processing worktable (1). The top of the mounting plate (601) is fixedly installed with several fixed clamps (602) with openings facing outward in a circumferential equidistant array.

4. The positioning fixture for machining an anti-detachment elastic cylindrical pin according to claim 1, characterized in that: The processing workbench (1) has several sets of slides (707) fixedly installed at the bottom. The inner sidewall of the slide (707) is slidably connected to a rack (703) through a side groove (706). The side groove (706) is opened on both sides of the rack (703).

5. A positioning fixture for machining an anti-detachment elastic cylindrical pin according to claim 1, characterized in that: The first gear (801) is coaxially fixedly installed under the active disk (701). The first gear (801) is rotatably connected to the lower part of the processing worktable (1) through the fixing frame (9). The first gear (801) is externally meshed with the second gear (802). The power input end of the second gear (802) is connected to the power output end of the servo motor (803).

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