Positioning jig for shaft machining

Abstract

The utility model relates to positioning jig technical field, concretely relates to a positioning jig for shaft machining, including work table, the inside of work table is provided with thread groove, the inside of thread groove is provided with main positioning assembly, the top of main positioning assembly is provided with shaft body, among them: Main positioning assembly includes threaded rod, the outside of threaded rod is connected with the inside of thread groove screw thread, drives shaft body to move up and down through rotating threaded rod, can position the adjustment of the machining height of shaft body, satisfies the precision demand of shaft body different machining height positioning, need not extra tool, has improved the positioning efficiency, the outside of shaft body is provided with auxiliary positioning assembly, through the auxiliary clamping of auxiliary positioning assembly to shaft body, improves the stability in shaft body positioning machining process, ensures the coaxiality of shaft body rotation center and machining equipment main shaft, reduces eccentric error and machining vibration.

Description

Technical Field

[0001] This utility model relates to the field of positioning fixture technology, and more specifically, to a positioning fixture for shaft machining. Background Technology

[0002] As a common output device for computers and other equipment, the precision and quality of the printer's internal components are crucial to print quality and the printer's lifespan. The spindle is one of the key internal components of a printer; for example, the printer's feed roller is used to transport the printing media, and the toner cartridge spindle supports the toner cartridge. The precision of these spindles directly affects the normal operation of the printer. Positioning fixtures can accurately determine the position of the spindle during processing, reducing positioning errors and ensuring the dimensional, shape, and positional accuracy of the spindle. This improves the overall processing quality of the printer spindle and meets the printer's high-precision requirements for spindles.

[0003] There are many existing technologies for positioning fixtures for shaft machining, such as:

[0004] Chinese Patent (Application No.: CN202323455670.6) discloses a machining fixture for shaft workpieces, relating to the technical field of machining fixtures for shaft workpieces. This machining fixture includes a main body, a support block at the top of the main body, a lifting mechanism inside the support block, and a support mechanism at the top of the main body. This machining fixture, by setting a fixing ring, allows for support of the shaft workpiece to be machined. Firstly, a connecting block is set inside the main body of the machining fixture. A positioning strip at the top of the main body facilitates the limiting of the connecting block. A connecting rod inside the fixing ring facilitates the limiting and support of the shaft workpiece. Simultaneously, a wheel on one side of the connecting rod facilitates the rotation of the shaft workpiece. A handle is provided on the side of the connecting block, allowing for easy pulling to move the fixing ring. This device facilitates the support of the shaft workpiece to be machined.

[0005] Printer spindles need to be connected to the mounting components in the printer through both ends during use. Therefore, during the processing, it may be necessary to punch holes at both ends of the spindle to facilitate subsequent connection. However, the height positioning of traditional positioning fixtures often relies on manual padding or replacement of pads, which has low adjustment accuracy and is time-consuming. Single-point positioning or simple clamping is often used during positioning, and the spindle is prone to shaking during processing, which affects the processing accuracy. Utility Model Content

[0006] This utility model addresses the technical problems existing in the prior art by providing a positioning fixture for shaft machining. It solves the problems of traditional positioning fixtures, which are not convenient for quickly adjusting the positioning height according to different machining requirements, thus affecting machining efficiency, and have poor stability during positioning, which can easily lead to accuracy deviations.

[0007] To achieve the above objectives, this utility model provides a positioning fixture for shaft machining, including a worktable with a threaded groove inside. A main positioning component is disposed inside the threaded groove, and a shaft is disposed on the top of the main positioning component. The main positioning component includes a threaded rod, the outer side of which is threadedly connected to the inner side of the threaded groove. By rotating the threaded rod, the shaft can be moved up and down, thereby adjusting the machining height of the shaft. An auxiliary positioning component is disposed on the outer side of the shaft to assist in clamping the shaft and improve the stability of the shaft positioning machining process.

[0008] The beneficial effects of this utility model are:

[0009] 1. When the machining height of the shaft needs to be adjusted, the top shaft can be moved up and down by rotating the threaded rod, achieving micron-level height adjustment. This meets the positioning requirements of different machining processes for shaft height without the need for additional tools.

[0010] 2. During the machining process of the shaft, the auxiliary positioning component clamps the shaft in both directions, achieving multi-dimensional stable positioning of the shaft, ensuring the coaxiality of the shaft rotation center with the spindle of the machining equipment, and reducing machining vibration.

[0011] Based on the above technical solution, the present invention can be further improved as follows.

[0012] Preferably, the threaded rod is provided with a positioning post at the top. The positioning post is engaged with the inside of one end of the shaft. The positioning post is engaged with the upper end of the threaded rod through a bottom engagement block. This allows for quick replacement of the positioning post with the same inner diameter according to the different diameters of the shaft to be processed, thus achieving stable positioning of shafts with various diameters.

[0013] The advantages of adopting the above-mentioned further solution are that it can quickly adapt to shafts of different diameters, solves the problem of insufficient versatility, and is easy to operate, reducing the time required for replacement.

[0014] Preferably, the auxiliary positioning component includes a support frame, which is fixedly connected to the top of the workbench. The support frame has symmetrically arranged clamping plates inside, and a flexible pad is fixedly connected to one side of each clamping plate.

[0015] The beneficial effect of adopting the above-mentioned further solution is that the clamping plate assists in clamping and positioning the shaft. During the process, the clamping plate contacts the surface of the shaft, which can provide sufficient clamping force and avoid damage to the surface of the shaft, making it suitable for high-precision surface processing scenarios.

[0016] Preferably, a connecting plate is fixedly connected to the other side of the clamping plate, and a lead screw is threaded to one end of the connecting plate. Two lead screws are fixedly connected to the output end of the same dual-axis motor. A limit rod is slidably connected inside the other end of the connecting plate, and the limit rod is fixedly connected to the rear end of the support frame.

[0017] The beneficial effects of adopting the above-mentioned further solution are that it enables one-click clamping and releasing of shafts of different diameters, improves the applicability of the fixture, reduces manual operation time, and improves production efficiency.

[0018] Preferably, positioning plates are symmetrically fixedly connected to the front and rear ends of the top of the workbench.

[0019] The beneficial effect of adopting the above-mentioned further solution is that the cylindrical machined part of the punching assembly passes through and slides through the through hole of the positioning plate, ensuring accurate punching position and further improving the machining accuracy of the shaft.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0021] This fixture utilizes the threaded transmission between the threaded rod and the threaded groove in the main positioning assembly. By rotating the threaded rod, the machining height of the shaft can be precisely adjusted, meeting the accuracy requirements for positioning the shaft at different machining heights. No additional tools are needed, thus improving positioning efficiency. Furthermore, the bidirectional clamping structure of the clamping plate in the auxiliary positioning assembly enables multi-dimensional stable positioning of the shaft, ensuring the coaxiality of the shaft's rotation center with the spindle of the machining equipment, and reducing eccentricity errors and machining vibrations. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the isometric structure of one side of this utility model;

[0023] Figure 2 This is a top view of the structure of this utility model;

[0024] Figure 3 This is a front cross-sectional view of the present invention.

[0025] Figure 4 This is an exploded view of the main positioning component of this utility model.

[0026] The meanings of the labels in the diagram are as follows:

[0027] 1. Worktable; 11. Threaded groove; 12. Positioning plate;

[0028] 2. Main positioning assembly; 21. Threaded rod; 22. Snap-fit ​​groove; 23. Positioning pin; 24. Snap-fit ​​block;

[0029] 3. Auxiliary positioning components; 31. Support frame; 32. Clamping plate; 33. Flexible pad; 34. Connecting plate; 35. Lead screw; 36. Dual-axis motor; 37. Limiting rod;

[0030] 4. Shaft. Detailed Implementation

[0031] 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.

[0032] Please see Figures 1-4 As shown, this embodiment provides a positioning fixture for shaft machining, including a worktable 1. Considering that traditional positioning fixtures are not convenient for quickly adjusting the positioning height according to different machining requirements, which affects machining efficiency, and the stability during positioning is poor, which can easily lead to accuracy deviation, a threaded groove 11 is provided inside the worktable 1. A main positioning component 2 is provided inside the threaded groove 11, and a shaft 4 is provided on the top of the main positioning component 2. The main positioning component 2 includes a threaded rod 21, the outer side of which is threadedly connected to the inner side of the threaded groove 11. By rotating the threaded rod 21, the shaft 4 can be moved up and down, and the machining height of the shaft 4 can be positioned and adjusted. An auxiliary positioning component 3 is provided on the outer side of the shaft 4. The auxiliary positioning component 3 assists in clamping the shaft 4, thereby improving the stability of the shaft 4 during the positioning and machining process.

[0033] In summary, the improvement of this embodiment lies in:

[0034] The fixture achieves precise adjustment of the machining height of the shaft 4 through the threaded lifting adjustment of the main positioning component 2, without the need for additional tools, thus improving positioning efficiency. In addition, the bidirectional clamping structure of the auxiliary positioning component 3 enables multi-dimensional stable positioning of the shaft 4 and reduces machining vibration.

[0035] Based on the above, other structures also need to be disclosed in detail, such as:

[0036] Considering the poor versatility of traditional positioning fixtures and their inability to adapt to the positioning and machining of shafts 4 of various specifications, a positioning post 23 is provided at the top of the threaded rod 21. The positioning post 23 is engaged with the inside of one end of the shaft 4. The positioning post 23 is engaged with the upper end of the threaded rod 21 through the bottom engagement block 24. The positioning post 23 with the same inner diameter can be quickly replaced according to the different diameters of the shaft 4 to be processed, so as to achieve stable positioning of shafts 4 of various diameters. It can quickly adapt to shafts 4 of different diameters, solve the problem of insufficient versatility, and is easy to operate, reducing the time required for replacement.

[0037] To effectively ensure the positioning stability of the shaft 4, the auxiliary positioning component 3 includes a support frame 31, which is fixedly connected to the top of the worktable 1. A clamping plate 32 is symmetrically arranged inside the support frame 31, and a flexible pad 33 is fixedly connected to one side of the clamping plate 32. The clamping plate 32 assists in clamping and positioning the shaft 4. During the process, the clamping plate 32 contacts the surface of the shaft 4, providing sufficient clamping force while avoiding damage to the surface of the shaft 4, making it suitable for high-precision surface machining scenarios.

[0038] To improve the versatility of the auxiliary positioning component 3, a connecting plate 34 is fixedly connected to the other side of the clamping plate 32. One end of the connecting plate 34 is threaded with a lead screw 35, and the two lead screws 35 are fixedly connected to the output end of the same dual-axis motor 36. A limit rod 37 is slidably connected inside the other end of the connecting plate 34 and is fixedly connected to the rear end of the support frame 31. The dual-axis motor 36 drives the two lead screws 35 to rotate synchronously, causing the clamping plates 32 on both sides to move relative to or away from each other simultaneously. This enables one-click clamping and releasing of shafts 4 with different diameters, improving the applicability of the fixture, reducing manual operation time, and increasing production efficiency. During the process, the limit rod 37 limits and guides the movement direction of the clamping plate 32, improving the stability and accuracy of the clamping plate 32's positional movement.

[0039] To effectively position the punching assembly and improve machining accuracy, positioning plates 12 are symmetrically fixedly connected to the front and rear ends of the top of the worktable 1. The cylindrical workpiece at one end of the punching assembly passes through the through hole of the positioning plate 12 and slides within the through hole, effectively ensuring the accurate positioning of the punching component.

[0040] In summary, the working principle of this solution is as follows:

[0041] First, select a positioning pin 23 with a suitable inner diameter for one end of the shaft 4 to be processed. Then, connect the positioning pin 23 to the snap-fit ​​groove 22 on the top of the threaded rod 21 via the snap-fit ​​block 24 to complete the installation of the positioning pin 23. Next, snap-fit ​​one end of the shaft 4 to the outside of the positioning pin 23. During the process, the replacement of the positioning pin 23 and the shaft 4 only requires a plug-and-play operation, which greatly shortens the changeover time. Then, the height of the shaft 4 is adjusted through the main positioning component 2. The worktable 1 has a threaded groove 11 inside, and the threaded rod 21 is threadedly connected to the threaded groove 11. Rotating the threaded rod 21 can drive the top shaft 4 to move up and down, achieving micron-level height adjustment, meeting the positioning requirements of the shaft 4 height for different processing steps, and without the need for additional tools.

[0042] Then, the auxiliary positioning component 3 ensures stable clamping of the shaft 4. The dual-axis motor 36 drives the lead screw 35 to rotate, and the connecting plate 34, which is threaded to the lead screw 35, drives the clamping plate 32 to move relative to or away from each other under the guidance of the limiting rod 37, thereby achieving bidirectional symmetrical clamping of the shaft 4. The flexible pad 33 on one side of the clamping plate 32 contacts the surface of the shaft 4, which can provide stable clamping force and avoid damage to the surface of the shaft 4. Shafts 4 of different diameters can be clamped and released with one click through this structure, improving the versatility of the fixture.

[0043] Furthermore, the positioning plates 12 at the front and rear ends of the top of the worktable 1 provide guidance and positioning for machining components such as the punching assembly. The cylindrical machining parts of the punching assembly pass through and slide through the through holes of the positioning plates 12, ensuring accurate punching position and further improving the machining accuracy of the shaft 4. Through the coordinated operation of the above multiple structures, this fixture effectively solves the shortcomings of traditional positioning fixtures in terms of height adjustment, versatility, and stability.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A positioning fixture for shaft machining, comprising a worktable (1), characterized in that: The worktable (1) is provided with a threaded groove (11) inside, and a main positioning component (2) is provided inside the threaded groove (11). A shaft (4) is provided on the top of the main positioning component (2). The main positioning component (2) includes a threaded rod (21). The outer side of the threaded rod (21) is threadedly connected to the inner side of the threaded groove (11). By rotating the threaded rod (21), the shaft (4) is driven to move up and down, and the machining height of the shaft (4) can be positioned and adjusted. An auxiliary positioning component (3) is provided on the outer side of the shaft (4). The auxiliary positioning component (3) assists in clamping the shaft (4), thereby improving the stability of the shaft (4) during the positioning and machining process.

2. The positioning fixture for shaft machining according to claim 1, characterized in that: The threaded rod (21) is provided with a positioning post (23) at the top, and the positioning post (23) is engaged with the inside of one end of the shaft (4).

3. A positioning fixture for shaft machining according to claim 2, characterized in that: The positioning pin (23) is engaged with the bottom snap-fit ​​block (24) in the snap-fit ​​groove (22) at the upper end of the threaded rod (21). The positioning pin (23) with the same inner diameter can be quickly replaced according to the different diameters of the shaft (4) to be processed, so as to achieve stable positioning of shafts (4) with various diameters.

4. A positioning fixture for shaft machining according to claim 1, characterized in that: The auxiliary positioning component (3) includes a support frame (31), which is fixedly connected to the top of the workbench (1). A clamping plate (32) is symmetrically arranged inside the support frame (31), and a flexible pad (33) is fixedly connected to one side of the clamping plate (32).

5. A positioning fixture for shaft machining according to claim 4, characterized in that: A connecting plate (34) is fixedly connected to the other side of the clamping plate (32). A lead screw (35) is threaded to one end of the connecting plate (34). The two lead screws (35) are fixedly connected to the output end of the same dual-axis motor (36).

6. A positioning fixture for shaft machining according to claim 5, characterized in that: The other end of the connecting plate (34) is internally connected to a limiting rod (37), which is fixedly connected to the rear end of the support frame (31).

7. A positioning fixture for shaft machining according to claim 1, characterized in that: The workbench (1) has positioning plates (12) fixedly connected symmetrically at both the front and rear ends of its top.

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