Pulley support machining tool

Abstract

The utility model discloses a pulley support machining tool, which belongs to the technical field of pulley supports and comprises a positioning support frame, and a pulley support fixing device, a lifting device and an indexing positioning plate are arranged on the positioning support frame. The lifting device is arranged on the lower portion of the pulley support fixing device so as to drive the pulley support fixing device to move up and down. The pulley support fixing device comprises a semicircular head positioning device, a V-shaped bottom face positioning device and a tail jacking lead screw. The tail jacking lead screw pushes the pulley support fixing device to move in the X-axis direction so that the semicircular head positioning device can coincide with the positioning face of the indexing positioning disc. Through the semicircular head positioning device and the V-shaped bottom surface positioning device, the pulley bracket can realize high-precision positioning in the X-axis direction and the Z-axis direction. And through adjustment of the tail jacking lead screw, high precision in the machining process is guaranteed, and therefore the machining quality is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of pulley bracket technology, specifically a pulley bracket processing tooling. Background Technology

[0002] The pulley bracket is used to change the traction direction of the wire rope. Its structure mainly consists of support plates supporting the pulley shaft. The support plates are located at both ends of the pulley shaft, and pulley shaft pin holes are machined on the support plates to ensure the stability of the pulley during operation. To prevent axial movement of the pulley shaft during use, retaining plates are installed at both ends of the pulley shaft, and internal threads are machined around the pulley hole end face of the pulley bracket. The retaining plates are fixed to the support plates with bolts, thus ensuring the stability of the pulley shaft. To facilitate pulley installation, a slot slightly larger than the pulley shaft is cut along a certain tangential direction of the pulley hole in the pulley bracket. This allows the pulley, pulley shaft, bearings, retaining rings, end caps, and other components to be pre-assembled before installation. The assembled pulley is then placed into the pulley bracket through the slot, quickly completing the pulley installation. In addition, a pulley cover is installed on the pulley bracket, and the pulley cover is connected to the pulley bracket with bolts to prevent the wire rope from jumping out from the top of the pulley.

[0003] Currently, the machining of pulley brackets still employs traditional manual operations and multi-stage processing methods, typically using boring machines, milling machines, and radial drilling machines for various machining operations. In the traditional method, the pulley bracket first requires marking. A fitter uses tools to mark coordinate lines in the X, Y, and Z directions on a platform to ensure the accurate machining position of the pulley bracket. After marking, the pulley bracket is hoisted onto the boring machine, and after precise manual alignment, the pulley hole is bored. The next step involves milling an opening groove on a milling machine, ensuring that the opening groove dimensions meet the requirements and are tangent to the diameter of the pulley hole. Subsequently, the pulley bracket is hoisted onto a radial drilling machine for drilling and tapping the internal threads on the end face. Afterward, it is rotated 180 degrees to continue machining the threads on the other side, completing the thread machining on both sides. Finally, the pulley bracket needs to be rotated 90 degrees to further machine the bolt holes for the pulley cover, ensuring the precise position of the bolt holes.

[0004] However, existing processing methods have many problems. First, the procedures are cumbersome, requiring specialized personnel for each step, and each operation has high technical requirements, making it prone to human error. Furthermore, because accuracy relies on manual scribing, scribing errors directly affect processing quality, making it difficult to guarantee the accuracy and efficiency of the entire process. The entire process requires the cooperation of multiple trades, leading to increased labor costs and a heavy workload. Multiple process transfers and equipment changes make it difficult to improve processing efficiency, especially under tight production schedules, where existing methods struggle to meet urgent production demands. Therefore, a new processing method is urgently needed that can improve processing accuracy and efficiency, reduce manual intervention, and achieve automated processing. Utility Model Content

[0005] To address the problem of requiring multiple process changes and fixture replacements in traditional methods for processing pulley brackets, this utility model provides a processing fixture for pulley brackets.

[0006] This utility model is achieved through the following technical solution: a tooling for processing pulley brackets, including a positioning support frame, on which a pulley bracket fixing device, a lifting device, and an indexing positioning plate are provided; the lifting device is located at the lower part of the pulley bracket fixing device to drive the pulley bracket fixing device to move up and down; the pulley bracket fixing device includes a semi-circular head positioning device, a V-shaped bottom positioning device, and a tail tightening screw; the tail tightening screw pushes the pulley bracket fixing device to move along the X-axis so that the semi-circular head positioning device coincides with the positioning surface of the indexing positioning plate.

[0007] A further improvement of this utility model is that the height of the V-shaped bottom positioning device is greater than the height of the semi-circular head positioning device.

[0008] A further improvement of this utility model is that the semi-circular head positioning device is provided with an opening groove for accommodating the pulley bracket.

[0009] A further improvement of this utility model is that a retaining plate fixing bolt is provided on the side of the semi-circular head positioning device.

[0010] A further improvement of this utility model is that the upper part of the semi-circular head positioning device is provided with a pulley cover fixing screw hole.

[0011] A further improvement of this utility model is that it also includes a Z-axis positioning device, which includes a Z-axis positioning plate and a tightening bolt. The tightening bolt is connected to the Z-axis positioning plate, and the top of the tightening bolt is rotated to make it contact the surface of the pulley bracket fixing device.

[0012] A further improvement of this utility model is that one end of the indexing positioning plate is fixed to the positioning support frame by a positioning pin.

[0013] A further improvement of this utility model is that the lifting device includes a lifting platform, an X-shaped bracket, a worm gear, a worm, a driven gear, and a right-hand screw; the X-shaped bracket is located below the lifting platform, the worm gear and the worm are located on both sides of the X-shaped bracket, and the driven gear and the right-hand screw are located below the output end of the worm. The worm gear meshes with the worm, and the worm gear drives the worm to rotate, thereby driving the driven gear and the right-hand screw to move to adjust the height of the X-shaped bracket.

[0014] As can be seen from the above technical solution, the beneficial effects of this utility model are: multiple processing steps of the pulley bracket can be completed in one clamping, including the processing of pulley holes, opening slots, end face threads, and pulley cover fixing bolt holes, avoiding the trouble of multiple sequence changes and fixture changes required in traditional processing, thus greatly improving processing efficiency; this fixture, through a semi-circular head positioning device and a V-shaped bottom positioning device, enables the pulley bracket to achieve high-precision positioning in the X and Z axis directions. The adjustment of the tail-end tightening screw ensures high precision during processing, thereby ensuring processing quality; at the same time, traditional methods require multiple processes and manual coordination, while this fixture, through a lifting device and indexing positioning plate, enables multiple processing steps to be completed in one clamping, simplifying the traditional multi-process processing flow, thereby optimizing the production process and improving production capacity and overall production efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a front view structural diagram of a specific embodiment of the present utility model.

[0017] Figure 2 This is a side view of a specific embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the pulley bracket fixing device according to a specific embodiment of the present utility model.

[0019] Figure 4 This is a front view schematic diagram of the lifting device structure according to a specific embodiment of the present utility model.

[0020] Figure 5 This is a side view of the lifting device structure according to a specific embodiment of the present utility model.

[0021] In the attached diagram: 1. Positioning pin; 2. Pulley bracket fixing device; 21. Opening slot; 22. Shaft retaining plate fixing bolt; 23. Pulley cover fixing screw hole; 3. Tail-end tightening screw; 4. Lifting device; 41. Lifting platform; 42. X-type bracket; 43. Worm gear; 44. Worm; 45. Driven gear; 46. Right-hand screw; 5. Clamping nut; 6. Clamping plate; 7. Indexing positioning plate; 8. Z-axis positioning plate; 9. Tightening bolt; 10. Horizontal machining center worktable; 11. Pressure plate device. Detailed Implementation

[0022] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0023] refer to Figure 1-5 As shown, this utility model discloses a pulley bracket processing fixture, which is installed on the worktable 10 of a horizontal machining center and is firmly fixed by a pressure plate device 11. It is suitable for completing multiple processing steps of pulley brackets in a horizontal machining center. This fixture can achieve X-axis and Z-axis positioning of the pulley bracket in a single clamping operation, and simultaneously complete the machining of the pulley hole, end face thread, and pulley cover fixing bolt hole. It includes a positioning support frame, on which a pulley bracket fixing device 2, a lifting device 4, and an indexing positioning plate 7 are mounted. The lifting device 4 is located at the lower part of the pulley bracket fixing device 2 to drive the pulley bracket fixing device 2 to move up and down. The pulley bracket fixing device includes a semi-circular head positioning device, a V-shaped bottom positioning device, and a tail tightening screw 3. The tail tightening screw 3 pushes the pulley bracket fixing device 2 to move along the X-axis so that the semi-circular head positioning device coincides with the positioning surface of the indexing positioning plate 7. In use, the pulley bracket machining fixture is placed flat on the horizontal machining center worktable 10, and the fixture is firmly fixed using the pressure plate device 11. Then, adjust the X and Z axes of the fixture to align it with the machine tool coordinate system. Place the pulley bracket fixing device 2 horizontally onto the rotating platform of the fixture. Using the tail screw 3, push the pulley bracket fixing device 2 along the X-axis until the semi-circular head positioning device of the pulley bracket perfectly aligns with the positioning surface of the indexing positioning plate 7, completing precise positioning in the X-axis direction. After the pulley bracket is placed, use the V-shaped bottom positioning device in the fixture to ensure the stability of the pulley bracket's bottom surface. After positioning, start the horizontal machining center to sequentially process the pulley holes, opening slots, end face threads, and pulley cover fixing bolt holes. Throughout the machining process, all holes and slots can be processed in a single setup, avoiding the hassle of multiple sequence changes and fixture replacements required in traditional methods. After machining, remove the pulley bracket from the fixture and inspect the machining quality to ensure that the dimensions of all machined holes and slots meet design requirements, thus completing the entire machining process.

[0024] This fixture allows for the completion of multiple machining steps for the pulley bracket in a single clamping operation, including machining the pulley holes, opening groove 21, end face threads, and pulley cover fixing bolt holes. This avoids the hassle of multiple sequence changes and fixture replacements required in traditional machining, thus greatly improving machining efficiency. The fixture utilizes a semi-circular head positioning device and a V-shaped bottom positioning device to achieve high-precision positioning of the pulley bracket in the X and Z axis directions. Adjustment of the tail-end tightening screw 3 ensures high precision during machining, thereby guaranteeing machining quality. Furthermore, while traditional methods require multiple processes and manual labor, this fixture, through the lifting device 4 and indexing positioning plate 7, enables multiple machining steps to be completed in a single clamping operation, simplifying the traditional multi-process machining flow, optimizing the production process, and improving production capacity and overall efficiency.

[0025] In the above embodiment, the height of the V-shaped bottom positioning device is greater than the height of the semi-circular head positioning device; the semi-circular head positioning device is provided with an opening slot 21 for accommodating the pulley bracket; and a retaining plate fixing bolt 22 is provided on the side of the semi-circular head positioning device. Since the opening slot 21 on the semi-circular head positioning device accommodates the head of the pulley bracket and ensures that it coincides with the positioning surface of the indexing positioning plate 7, precise positioning in the X-axis direction is achieved. When the pulley bracket is in the initial positioning state, the greater height of the V-shaped bottom positioning device than the semi-circular head positioning device ensures that the pulley bracket is stably placed and precisely aligned with the bottom surface of the tooling. The retaining plate fixing bolt 22 on the side further fixes the pulley bracket, ensuring that the pulley bracket will not shift during processing. Furthermore, the pulley cover fixing screw hole 23 of the pulley bracket is located on the upper part of the semi-circular head positioning device, ensuring that the pulley cover fixing bolt can be accurately machined and preventing the pulley cover from falling off during processing.

[0026] The system also includes a Z-axis positioning device, comprising a Z-axis positioning plate 8 and a tightening bolt 9. The tightening bolt 9 is connected to the Z-axis positioning plate 8, and rotating the tightening bolt 9 causes its top end to contact the pulley bracket fixing device 2. The Z-axis positioning device, through the cooperation of the Z-axis positioning plate 8 and the tightening bolt 9, provides an efficient and precise method for positioning the pulley bracket. First, the Z-axis positioning plate 8 is placed in the Z-axis direction of the fixture and its stability is ensured. Then, the tightening bolt 9 is rotated so that its top end contacts the pulley bracket fixing device 2, and the pressure of the bolt firmly fixes the pulley bracket, ensuring its precise positioning in the Z-axis direction. During this process, the pulley bracket does not experience any displacement during processing, greatly improving processing accuracy. Through this precise positioning method, the fixture not only ensures the stability of the pulley bracket in the Z-axis direction but also reduces manual intervention, simplifies operation steps, and improves production efficiency. Furthermore, this design optimizes the production process by reducing the need for repeated adjustments, making the entire processing more efficient and stable.

[0027] One end of the indexing positioning plate 7 is fixed to the positioning support frame by a positioning pin 1, ensuring the precise rotation and stability of the indexing positioning plate. During use, the indexing positioning plate 7 is first installed onto the positioning support frame of the tooling, and the positioning pin 1 is used to fix the indexing positioning plate 7 to the support frame, ensuring that the positioning plate 7 will not experience any offset or rotational error during processing, providing reliable support for subsequent processing steps. Due to the precise fit of the indexing positioning plate 7, the various processing surfaces of the pulley bracket can be accurately aligned, ensuring high precision of the holes and grooves during processing. This structural design improves the stability of the tooling and makes the entire processing process more efficient. The precise fit of the positioning pin 1 reduces operator adjustment time and errors, improves production efficiency and processing accuracy, thereby enhancing the automation level and stability of production.

[0028] The lifting device 4 includes a lifting platform 41, an X-shaped bracket 42, a worm gear 43, a worm 44, a driven gear 45, and a right-hand screw 46. The X-shaped bracket 42 is located below the lifting platform 41. The worm gear 43 and the worm 44 are located on both sides of the X-shaped bracket 42. The driven gear 45 and the right-hand screw 46 are located below the output end of the worm 44. The worm gear 43 meshes with the worm 44, and the worm gear 43 drives the worm 44 to rotate, thereby driving the driven gear 45 and the right-hand screw 46 to move to adjust the height of the X-shaped bracket 42. In use, the X-shaped bracket 42 is initially located below the lifting platform 41, forming a meshing transmission system with the worm gear 43 and the worm 44. The rotating worm gear 43 drives the worm 44 to rotate, which in turn drives the driven gear 45 and the right-hand screw 46 to move. The height of the X-shaped bracket 42 is adjusted by rotating the right-hand screw 46. This lifting device 4 can precisely adjust the height of the pulley bracket machining fixture as needed, thus adapting to different machining requirements. During use, the lifting device 4 provides smooth and precise height adjustment, ensuring the pulley bracket maintains its optimal working position during machining. Through the efficient transmission of the worm gear 43 and worm 44, the entire lifting process is smooth and precise, avoiding the loosening and errors that may occur in traditional lifting methods, and improving the stability and machining accuracy of the fixture. The use of this lifting device 4 not only improves work efficiency but also reduces the complexity of manual operation, ensuring precise positioning and height adjustment during the pulley bracket machining process, further optimizing the production process and enhancing the automation level of the fixture.

[0029] In summary, when using this pulley bracket machining fixture, it is first placed flat on the horizontal machining center worktable 10 and firmly fixed by the pressure plate device 11 to ensure alignment with the machine tool coordinate system. After securing it, the X and Z axes of the fixture are adjusted to be completely parallel to the machine tool coordinate system, providing a precise positioning basis. Then, the pulley bracket fixing device 2 is placed horizontally on the rotating platform of the fixture, and the tail end is rotated to tighten the lead screw 3, pushing the pulley bracket fixing device 2 to move along the X-axis until the semi-circular head positioning device of the pulley bracket perfectly aligns with the positioning surface of the indexing positioning plate 7, completing the precise positioning in the X-axis direction.

[0030] After the pulley bracket is placed, the V-shaped bottom positioning device in the fixture is aligned with the Z-axis positioning plate 8 at the bottom of the fixture to ensure the stability of the pulley bracket's bottom surface and prevent displacement during processing. Then, the tightening bolt 9 is rotated so that its top end contacts the pulley bracket fixing device 2, and the pressure of the tightening bolt firmly fixes the pulley bracket, ensuring its stability in the Z-axis direction. At this point, the pulley bracket has been accurately positioned in both the X and Z axes.

[0031] After positioning, use the clamping nut 5 and clamping plate 6 to further strengthen the fixation, ensuring that the pulley bracket will not shift during processing. By rotating the clamping nut 5 and cooperating with the clamping plate 6, the pulley bracket is firmly engaged with the tooling, providing stable support for the subsequent processing steps.

[0032] Then, by starting the horizontal machining center, the pulley holes, opening slots, end face threads, and pulley cover fixing bolt holes are machined sequentially. All holes and slots can be machined in a single setup, avoiding the hassle of multiple sequence changes and fixture replacements required in traditional methods, significantly improving machining efficiency. During the machining process, all steps are performed with the pulley support fixed and stable, ensuring machining accuracy.

[0033] After the machining is completed, the height of the X-shaped bracket 42 is adjusted by rotating the right-hand screw 46 to complete the machining of the screw on one side of the retaining plate. Then, the pulley bracket is rotated 180 degrees to continue machining the screw on the other side of the retaining plate.

[0034] Finally, after machining the inner hole, opening groove, and end face thread, the height of the X-shaped bracket 42 is lowered by rotating the right-hand lead screw 46 to ensure the rotating body can pass smoothly. During this process, the indexing plate locating pin 1 is pulled out, and the rotating body is rotated 90 degrees so that the locating pin hole of the support body aligns with the 90-degree locating pin hole of the rotating body. The locating pin 1 is then inserted to ensure the accurate position of the pulley cover fixing bolt holes. Through this operation, the horizontal machining center is restarted to machine the fixing bolt holes, ensuring that the dimensions of all machined holes and grooves meet the design requirements, thus completing the entire machining process.

[0035] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tooling for machining a pulley bracket, characterized in that, The system includes a positioning support frame, on which a pulley bracket fixing device (2), a lifting device (4), and an indexing positioning plate (7) are provided. The lifting device (4) is located at the lower part of the pulley bracket fixing device (2) to drive the pulley bracket fixing device (2) to move up and down. The pulley bracket fixing device includes a semi-circular head positioning device, a V-shaped bottom positioning device, and a tail tightening screw (3). The tail tightening screw (3) pushes the pulley bracket fixing device (2) to move along the X-axis so that the semi-circular head positioning device coincides with the positioning surface of the indexing positioning plate (7).

2. The tooling for processing the pulley bracket according to claim 1, characterized in that, The height of the V-shaped bottom positioning device is greater than the height of the semi-circular head positioning device.

3. The tooling for processing the pulley bracket according to claim 1, characterized in that, The semi-circular head positioning device is provided with an opening groove (21) to accommodate the pulley bracket.

4. The tooling for processing the pulley bracket according to claim 1, characterized in that, The side of the semi-circular head positioning device is provided with a retaining plate fixing bolt (22).

5. The tooling for processing the pulley bracket according to claim 1, characterized in that, The upper part of the semi-circular head positioning device is provided with a pulley cover fixing screw hole (23).

6. The tooling for machining the pulley bracket according to claim 1, characterized in that, It also includes a Z-axis positioning device, which includes a Z-axis positioning plate (8) and a tightening bolt (9). The tightening bolt (9) is connected to the Z-axis positioning plate (8), and the tightening bolt (9) is rotated so that its top end contacts the surface of the pulley bracket fixing device (2).

7. The tooling for machining the pulley bracket according to claim 1, characterized in that, One end of the indexing positioning plate (7) is fixed to the positioning support frame by a positioning pin (1).

8. The tooling for machining the pulley bracket according to claim 1, characterized in that, The lifting device (4) includes a lifting platform (41), an X-shaped bracket (42), a worm gear (43), a worm (44), a driven gear (45), and a right-hand screw (46). The X-shaped bracket (42) is located below the lifting platform (41). The worm gear (43) and the worm (44) are located on both sides of the X-shaped bracket (42). The driven gear (45) and the right-hand screw (46) are located below the output end of the worm (44). The worm gear (43) meshes with the worm (44). The worm gear (43) drives the worm (44) to rotate, thereby driving the driven gear (45) and the right-hand screw (46) to move to adjust the height of the X-shaped bracket (42).

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