A sliding ladder shaft turning mechanism

Abstract

The utility model discloses a kind of sliding ladder shafts overturning U-turn mechanisms, including base, mounting seat, support seat, transfer station, height adjusting device, turnover plate, gear, turnover cylinder, rack and clamping device.Installing seat and support seat left and right alignment are set on base, turnover plate bottom is hinged with support seat by hinge shaft, gear is coaxially fixed connection with hinge shaft, turnover cylinder body is fixed in support seat bottom, the rack of its output end is engaged with gear.Clamping device is fixed in turnover plate top.The utility model drives rack linear motion by turnover cylinder, drive gear and hinge shaft rotation, and then drive turnover plate and clamping device rotate 90 °, ladder shaft is overturned from horizontal state to vertical state and placed on transfer station, effectively solve the short or vertical state ladder shaft in the process of automated U-turn due to clamping instability resulting in risk of falling, improve production safety and reliability.

Description

Technical Field

[0001] This utility model relates to the field of stepped machining technology, and in particular to a sliding stepped shaft flipping and turning mechanism. Background Technology

[0002] In the field of machining, stepped shafts are a common part structure. During the turning process, it is often necessary to machine both ends of the shaft separately. Due to structural limitations, it is often difficult to complete all the processes in a single setup. Therefore, after machining one end, the workpiece needs to be turned around to machine the other end.

[0003] Currently, gantry robots or six-axis robot grippers are commonly used in automated production lines to achieve automatic loading, unloading, and orientation changes of workpieces. Specifically, the robot gripper first retrieves the machined end of the stepped shaft from the machine tool, then rotates the workpiece 180° during movement using its own rotation mechanism (such as a gripper rotation axis driven by a servo motor), and finally feeds the unprocessed end into the machine tool for clamping.

[0004] However, this turning method based on the autonomous rotation of the robotic gripper has significant limitations. When the overall length of the stepped shaft to be processed is short, or when the incoming material is already in a vertical position, the gripper can only hold the end of the workpiece and cannot effectively hold its cylindrical surface. In this gripping state, if the gripper is forcibly driven to rotate, the workpiece is very likely to fall off or fly away due to insufficient or unbalanced gripping force, posing a serious safety hazard. In addition, for some gripper structures or incoming material conditions, the physical space may not allow the gripper to perform rotational movements, thus causing the automated process to be interrupted.

[0005] Therefore, there is a lack of a dedicated mechanism in the existing technology that can stably and reliably realize the automatic turning of short stepped shafts or vertical workpieces, which has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the embodiments of this utility model provide a sliding stepped shaft flipping and turning mechanism.

[0007] To achieve the above objectives, the innovative points of this utility model are as follows: including: Base; The mounting base and support base are aligned left and right on the base; The transfer platform is located on one side of the mounting base; A height adjustment device is installed on the mounting base and connected to the transfer platform to adjust the vertical height of the transfer platform; The flip plate has its bottom hinged to the top of the support base via a hinge axis; A gear, which is coaxially and fixedly connected to the hinge shaft; The tilting cylinder has its cylinder body fixed to the bottom of the support base, and its output end is equipped with a rack that meshes with a gear. A clamping device, fixed to the top of the flip plate, is used to receive and clamp the stepped shaft from the external grippers. The tilting cylinder drives the rack to move linearly, which in turn drives the gear and hinge shaft to rotate, thereby driving the tilting plate and clamping device to rotate 90°, so that the clamped stepped shaft is tilted from a horizontal state to a vertical state and placed on the transfer platform.

[0008] Furthermore, the aforementioned clamping device includes a gripper cylinder and a three-jaw chuck disposed at the output end of the gripper cylinder.

[0009] Furthermore, the aforementioned height adjustment device includes a height adjustment rod vertically fixed to the bottom of the turntable, and a locking nut disposed on the mounting base for locking the height adjustment rod; the height adjustment rod is slidably inserted into the mounting base.

[0010] Furthermore, symmetrical through-beam sensors are provided on both sides of the aforementioned transfer platform to detect whether the stepped shaft has been placed on the transfer platform.

[0011] The beneficial effects of this utility model are: Addressing the risk of workpiece detachment caused by the autonomous rotation of robot grippers in the prior art, this invention completely replaces the robot gripper's own rotational motion by incorporating a dedicated flipping mechanism consisting of a flipping cylinder, gears, racks, and a flipping plate. This eliminates the need for the gripper to rely on clamping a cylindrical surface to perform rotation during workpiece transfer. Even for short or vertically positioned stepped shafts, stable and reliable transfer and flipping can be achieved by clamping their ends. This fundamentally solves the safety hazards of workpiece detachment and ejection caused by poor clamping conditions in existing technologies, improving the operational safety and reliability of automated production lines.

[0012] The flipping mechanism of this invention adopts a gear and rack transmission and is driven by a cylinder, ultimately achieving vertical placement of the workpiece through a mechanical structure (rotation of the flipping plate by 90°). This motion path is fixed and precise, avoiding trajectory errors and program complexity that may arise from multi-axis linkage in robots. Simultaneously, the purely mechanical flipping action exhibits high rigidity, fast response, and accurate positioning, significantly improving the stability and repeatability of the workpiece turning process, thus ensuring production cycle time and product quality. Attached Figure Description

[0013] Figure 1 This is an isometric view of the front of this utility model. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Example 1: This example provides a sliding stepped shaft flipping and turning mechanism, the overall structure of which is as follows: Figure 1 As shown.

[0016] See Figure 1 The sliding step shaft flipping and turning mechanism mainly includes a base 1, a mounting base 7, a support base 6, a turntable 3, a height adjustment device, a flipping plate 5, a gear 52, a rack 53, a flipping cylinder 2, a clamping device, and a through-beam sensor 10.

[0017] The mounting base 7 and the support base 6 are fixedly mounted on the base 1 with their left and right sides aligned. The transfer platform 3 is located on one side of the mounting base 7 and is used to receive the stepped shaft after it has been flipped.

[0018] The height adjustment device is used to adjust the vertical height of the transfer platform 3 to accommodate stepped shafts of different lengths. Specifically, the device includes a height adjustment rod 8 vertically fixed to the bottom of the transfer platform 3 and a locking nut 9 sleeved on the mounting base 7. The height adjustment rod 8 can slide up and down through the mounting base 7, and the height position of the transfer platform 3 can be adjusted and locked by loosening or tightening the locking nut 9.

[0019] The bottom of the flip plate 5 is hinged to the top of the support base 6 via a hinge shaft 51, allowing the flip plate 5 to rotate around the hinge shaft 51. The gear 52 is coaxially and fixedly connected to the hinge shaft 51, for example, through a key connection to achieve circumferential fixation, and rotates together with the hinge shaft 51. The cylinder body of the flip cylinder 2 is fixedly mounted on the bottom of the support base 6, and its piston rod output end is provided with a rack 53 that meshes with the gear 52. Thus, the linear extension and retraction motion of the piston rod of the flip cylinder 2 can be precisely converted into the rotational motion of the hinge shaft 51 and the flip plate 5 through the meshing of the rack 53 and the gear 52.

[0020] A clamping device is fixedly mounted on the top of the flipping plate 5 for gripping the stepped shaft during the flipping process. In this embodiment, the clamping device includes a gripper cylinder 4 and a three-jaw chuck 41 mounted on its output end. The three-jaw chuck 41 is used to receive and clamp the stepped shaft from the external truss grippers (not shown in the figure).

[0021] In addition, a set of through-beam sensors 10 are symmetrically installed on both sides of the transfer platform 3 to detect whether the stepped shaft has been accurately placed on the transfer platform 3.

[0022] The working principle of this utility model is as follows: In the initial state, the flip plate 5 and the clamping device are in a horizontal position.

[0023] 1. Handing over the workpiece: The external truss gripper horizontally moves the stepped shaft with one end already machined to this mechanism. The gripper cylinder 4 drives the three-jaw chuck 41 to receive and clamp the stepped shaft from the truss gripper.

[0024] 2. Tilting and Turning: The tilting cylinder 2 is activated, and its piston rod drives the rack 53 to move linearly. The rack 53 drives the gear 52 it meshes with to rotate, thereby driving the hinge shaft 51 and the tilting plate 5 fixed thereon to rotate 90° as a whole. This action flips the originally horizontally clamped stepped shaft to a vertical position, placing its lower end on the turntable 3. At this time, the unprocessed end of the stepped shaft faces upward.

[0025] 3. Detection and Re-grip: When the stepped shaft is placed on the turntable 3, the through-beam sensors 10 on both sides detect the workpiece arrival signal. Subsequently, the external gantry grippers move again, gripping the stepped shaft that is standing vertically on the turntable 3 with the unprocessed end facing upwards, and transfer it to the machine tool for the next processing step.

[0026] 4. Height Adaptation: For stepped shafts of different lengths, the height of the turntable 3 can be changed by adjusting the position of the height adjustment rod 8 in the mounting base 7, ensuring that the stepped shaft can stand stably and vertically on the table after flipping.

[0027] In summary, this utility model, through the ingenious combination of gears, racks, and cylinders, achieves automated and precise turning of stepped shafts, effectively solving the problem of difficulty in turning short shaft parts in automated production.

[0028] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other. Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sliding stepped shaft flipping and turning mechanism, characterized in that, include: Base (1); The mounting base (7) and the support base (6) are arranged side by side on the base (1); The transfer station (3) is located on one side of the mounting base (7); A height adjustment device is provided on the mounting base (7) and connected to the transfer platform (3) for adjusting the vertical height of the transfer platform (3); The flip plate (5) is hinged at its bottom to the top of the support base (6) via a hinge shaft (51); Gear (52), which is coaxially and fixedly connected to the hinge shaft (51); The tilting cylinder (2) has its cylinder body fixed to the bottom of the support base (6), and its output end is provided with a rack (53) that meshes with the gear. A clamping device, fixed to the top of the flip plate (5), is used to receive and clamp the stepped shaft from the external jaws; The flipping cylinder (2) drives the rack to move linearly, which in turn drives the gear and hinge shaft to rotate, thereby driving the flipping plate (5) and the clamping device to rotate 90°, so that the clamped stepped shaft flips from a horizontal state to a vertical state and is placed on the transfer table (3).

2. The sliding stepped shaft flipping and turning mechanism according to claim 1, characterized in that, The clamping device includes a gripper cylinder (4) and a three-jaw chuck (41) disposed at the output end of the gripper cylinder (4).

3. The sliding stepped shaft flipping and turning mechanism according to claim 1, characterized in that, The height adjustment device includes a height adjustment rod (8) vertically fixed to the bottom of the transfer platform (3) and a locking nut (9) provided on the mounting base (7) for locking the height adjustment rod (8); the height adjustment rod (8) is slidably inserted into the mounting base (7).

4. The sliding stepped shaft flipping and turning mechanism according to claim 1, characterized in that, The transfer station (3) is symmetrically equipped with through-beam sensors (10) on both sides to detect whether the stepped shaft has been placed on the transfer station (3).

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