A drill positioning tool for bushings
By designing a bushing drilling fixture with a rotatable base and limiting holes, the need for multi-angle drilling was solved, enabling efficient and precise bushing processing, which is suitable for mass production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANXIN ZHAO TECH CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-06-19
AI Technical Summary
Existing bushing drilling fixtures cannot meet the needs of drilling at multiple angles in a single clamping, resulting in frequent clamping and adjustment, increasing errors and time costs.
Design a bushing drilling positioning fixture. The base is mounted on the substrate via a rotating shaft, which can rotate to adjust the angle and is fixed by limiting holes and fasteners. It works with the cover plate to press the bushing, thus achieving drilling requirements at different angles.
It improves processing efficiency and precision, reduces operational difficulty and time costs, and ensures the accuracy and stability of drilling positions, making it suitable for mass production.
Smart Images
Figure CN224373441U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of bushing manufacturing and processing technology, and in particular to a bushing drilling and positioning fixture. Background Technology
[0002] In the field of machining, bushings are common parts widely used in various equipment. Their main function is to provide support and lubrication for other transmission components, reduce wear between parts, and improve the operating accuracy and reliability of the equipment. Especially in some precision equipment and critical parts such as high-speed train bogies, the machining accuracy requirements for bushings are even higher.
[0003] Currently, in the field of bushing production and processing, positioning and drilling of bushings are involved. Relevant existing technologies, such as the Chinese patent application "Tooling for Drilling Multiple Eccentric Holes in Thin-Walled Bushing Parts," disclose a structure mainly including an upper pressure plate, a lower pressure plate, screws, guide posts, and springs. The upper and lower pressure plates have clamps and drill bit insertion holes. The workpiece is held in place by the clamps of the upper and lower pressure plates via the guide posts and screws. The drill bit drills holes in the workpiece through the drill bit insertion holes. This method facilitates clamping and positioning, causes virtually no damage to the product, and prevents loosening. For example, Chinese patent application "A Bushing Drilling Positioning Fixture", application number: CN201621202908.1, discloses a fixture including a base, a vertical plate, a hole-machining positioning fixture, and a baffle. The vertical plate is vertically fixedly connected to the base. The hole-machining positioning fixture is a cylindrical structure with screws at both ends. The screw at one end of the hole-machining positioning fixture passes through the vertical plate and is locked by a first nut. The screw at the other end of the hole-machining positioning fixture passes through the baffle and is locked by a second nut. A radial through hole perpendicular to the axial direction of the cylindrical structure is formed on the cylindrical structure of the hole-machining positioning fixture.
[0004] While existing drilling fixture technology has made some progress, it still has some shortcomings. For example, existing fixtures are limited in their ability to handle machining requirements that require drilling at multiple angles in a single setup. They cannot meet the requirement of drilling sequentially at different angles, leading to frequent clamping and adjustment during machining, which increases errors and time costs. Utility Model Content
[0005] The technical problem to be solved by this application is to provide a bushing drilling positioning fixture that does not require repeated disassembly and assembly, meets the needs of drilling at different angles, and improves production efficiency and processing quality.
[0006] The technical solution adopted in this application is as follows: a bushing drilling and positioning fixture, including a base plate, a base and a cover plate. The base is mounted on the base plate via a rotating shaft. When the base is subjected to force, it rotates on the base plate around the rotating shaft. The top surface of the base is provided with a mounting groove for mounting the bushing. The cover plate is mounted on the base to press the bushing in the mounting groove. A fixing seat is provided on the base plate. A plurality of limiting holes are correspondingly provided on the outer circumference of the base. A locking fastener is installed on the fixing seat. The locking fastener can be inserted into the limiting holes that move to the fixing seat to fix the base.
[0007] Compared with existing technologies, the advantages of this application are that the base is mounted on the substrate via a rotating shaft and can rotate around the shaft. This means that after clamping the bushing once, the machining angle of the bushing can be adjusted by rotating the base, thereby meeting drilling requirements at different angles without disassembling and repositioning the tooling, greatly improving machining efficiency. The fixing seat on the substrate, together with several limiting holes on the outer circumference of the base and locking fasteners that can be inserted into the limiting holes, can firmly fix the base to the substrate after it is rotated to the required angle. This design ensures that the base will not shift during drilling, thus guaranteeing the accuracy of the drilling position and meeting the precision requirements of drilling at different angles. The operation of rotating the base to adjust the angle is simple and easy. Combined with the quick positioning and fixing functions of the limiting holes and locking fasteners, workers do not need complicated operating steps and tools when adjusting the machining angle, saving time, reducing operating difficulty, and improving production efficiency.
[0008] The cover plate, mounted on the base, presses and secures the bushing within the mounting slot. This clamping method effectively prevents the bushing from shifting or loosening during drilling due to the impact force of the drill bit, ensuring the stability of the drilling process and thus improving the quality and precision of the hole machining. Operators can quickly place the bushing into the mounting slot of the base, then install the cover plate for clamping, completing the clamping operation. Similarly, after drilling is complete, simply loosening the cover plate allows for quick removal of the machined bushing, facilitating the machining of the next bushing, significantly improving work efficiency and making it suitable for mass production.
[0009] In this application, both the base and the cover are designed as contour-following structures, matching the bushing design.
[0010] In some embodiments of this application, the pivot is located at the central axis of the base, and the base rotates around its central axis when subjected to force; a plurality of rotating handles are provided on the outer circumferential surface of the base.
[0011] The operator applies force to the rotating handle, causing the entire base to rotate. The rotating handle is designed to facilitate the operator's application of force to the base, allowing it to easily rotate around its central axis, thereby achieving the purpose of quickly adjusting the processing angle and improving work efficiency.
[0012] In some embodiments of this application, the bottom surface of the mounting groove is provided with an embedding groove and a limiting post, the embedding groove is located at the center of the bottom surface of the mounting groove, and the limiting post is disposed in contact with the inner wall surface of the mounting groove.
[0013] In this application, the embedded groove and limiting post are designed to match the shape and structure of the bushing, making the bushing more stable within the mounting groove, preventing displacement during drilling, and improving drilling accuracy. Simultaneously, this structure can accommodate bushings of different sizes, enhancing the versatility of the tooling.
[0014] In some embodiments of this application, a slot is provided on the outer peripheral surface of the base, and the slot communicates with the mounting slot.
[0015] In this application, the base has an overall cylindrical structure. If only the top surface is open, it would be inconvenient to remove the bushing after it is installed. Therefore, a slot is made on the outer circumference of the base. The slot design provides more space for the bushing to be placed and removed, allowing operators to more easily and quickly install the bushing into or remove it from the mounting slot of the base, thus improving the efficiency of clamping and unloading.
[0016] In some embodiments of this application, the base is generally cylindrical in shape, and includes a base plate and an outer ring. The slot is formed on the outer ring, and a plurality of limiting holes are provided on the outer circumferential surface of the base plate.
[0017] The cylindrical base structure can be well adapted to the bushing structure, increasing the stability of the tooling. The groove on the outer ring facilitates the removal and placement of the bushing, while the limiting holes on the outer circumference of the base provide multiple position options for fixing the base, ensuring that the base can be firmly fixed to the base plate at different angles.
[0018] In some embodiments of this application, four limiting holes are evenly distributed on the outer peripheral surface of the chassis, and the included angle between two adjacent limiting holes is 90 degrees.
[0019] When used with locking fasteners, the base can be temporarily locked at 90-degree intervals. This positioning fixture, in conjunction with a single-axis bench drill, fulfills the functional requirement of drilling four holes sequentially in a single setup, improving processing efficiency and ensuring angular accuracy between the holes.
[0020] In some embodiments of this application, the end of the locking fastener is adapted to the limiting hole structure, and the locking fastener is a ball screw.
[0021] Ball screws, a common type of fastener, have an end structure that adapts to the limiting hole, allowing for quick insertion and withdrawal, thus enabling rapid locking and unlocking of the base. This type of fastener is convenient to operate, highly reliable, and effectively improves the adjustment speed and stability of tooling.
[0022] In some embodiments of this application, the top surface of the base is provided with two positioning posts, which are spaced apart. The cover plate is provided with positioning holes corresponding to the positioning posts, and the positioning posts pass through the positioning holes when the cover plate is installed on the base.
[0023] The matching of the positioning pin and the positioning hole ensures the accurate positioning of the cover plate when it is installed on the base, making the connection between the cover plate and the base more stable and reliable. This avoids problems such as insecure bushing clamping or drilling position deviation caused by cover plate misalignment, thus improving processing quality and efficiency.
[0024] In some embodiments of this application, the cover plate is provided with a plurality of guide holes.
[0025] The pilot hole provides guidance for the drill bit of the single-axis bench drill, guiding the drill bit to accurately align with the predetermined hole position on the bushing during the drilling process. This ensures the directional and positional accuracy of the drilling, reduces the risk of drill bit deflection and hole position deviation, and improves the quality and consistency of hole machining.
[0026] In some embodiments of this application, the cover plate is provided with a locking hook, and the base is provided with a locking buckle corresponding to the locking hook. The locking buckle and the locking hook cooperate to detachably fix the cover plate to the base.
[0027] The combination of the hook and latch provides a simple and reliable way to fix the cover plate, allowing for quick attachment or removal. This detachable fixing method not only facilitates operation but also ensures the connection strength between the cover plate and the base, preventing the cover plate from loosening during drilling. This improves the clamping stability of the bushing and contributes to better drilling quality.
[0028] Based on common knowledge in the field, the above-described embodiments can be combined arbitrarily. Attached Figure Description
[0029] The present application will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present application. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.
[0030] Figure 1 This is a schematic diagram of the structure of this application;
[0031] Figure 2 This is a schematic diagram of the structure of the locking device in this application;
[0032] Figure 3 This is a schematic diagram of the base structure in this application;
[0033] Figure 4 This is a schematic diagram of the cover plate in this application.
[0034] The specific reference numerals in the attached drawings are explained as follows: 1. Base plate; 2. Base; 3. Cover plate; 4. Rotating shaft; 5. Mounting groove; 6. Fixing seat; 7. Limiting hole; 8. Locking fastener; 9. Rotating handle; 10. Embedded groove; 11. Limiting post; 12. Groove; 13. Chassis; 14. Outer ring; 15. Locking hook; 16. Locking buckle; 17. Positioning post; 18. Positioning hole; 19. Guide hole. Detailed Implementation
[0035] The present application will now be described in detail with reference to the accompanying drawings.
[0036] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.
[0037] A bushing drilling positioning fixture, Example 1, as follows: Figures 1 to 2 As shown, the assembly includes a base plate 1, a base 2, and a cover plate 3. The base 2 is mounted on the base plate 1 via a rotating shaft 4. When subjected to force, the base 2 rotates around the rotating shaft 4 on the base plate 1. This means that after one bushing clamping, the machining angle of the bushing can be adjusted by rotating the base 2, thereby achieving drilling requirements at different angles without disassembling and repositioning the tooling, greatly improving processing efficiency. A fixing seat 6 is provided on the base plate 1, and several limiting holes 7 are correspondingly provided on the outer circumference of the base 2. A locking fastener 8 is installed on the fixing seat 6, which can be inserted into the limiting holes 7 to fix the base 2. This design ensures that the base 2 will not shift during drilling, thus guaranteeing the accuracy of the drilling position and meeting the precision requirements for drilling at different angles. The rotating base 2 is easy to operate for adjusting the angle. Combined with the quick positioning and fixing functions of the limiting hole 7 and the locking fastener 8, it eliminates the need for complicated operating steps and tools when adjusting the processing angle, saving time, reducing the difficulty of operation, and improving production efficiency.
[0038] The base 2 has a mounting groove 5 on its top surface for mounting bushings. The cover plate 3, installed on the base 2, presses the bushing within the mounting groove 5 firmly. This pressing method effectively prevents the bushing from shifting or loosening due to the impact of the drill bit during drilling, ensuring the stability of the drilling process and thus improving the quality and precision of the hole machining. Operators can quickly place the bushing into the mounting groove 5 of the base 2 and then install the cover plate 3 for pressing, completing the clamping operation. Similarly, after drilling is completed, simply loosening the cover plate 3 allows for quick removal of the machined bushing, facilitating the machining of the next bushing, greatly improving work efficiency and making it suitable for mass production.
[0039] In this application, both the base 2 and the cover plate 3 are designed as contour-following structures, matching the bushing design.
[0040] Example 2, as Figures 1 to 4 As shown, the rotating shaft 4 is located at the central axis of the base 2, and the base 2 rotates around its central axis when subjected to force. Several rotating handles 9 are provided on the outer circumference of the base 2. The operator applies force to the rotating handles 9, thereby rotating the entire base 2. The rotating handles 9 facilitate the operator's application of force to the base 2, easily rotating it around its central axis, thus achieving the purpose of quickly adjusting the processing angle and improving work efficiency.
[0041] The bottom surface of the mounting groove 5 is provided with an embedding groove 10 and a limiting post 11. The embedding groove 10 is located at the center of the bottom surface of the mounting groove 5, and the limiting post 11 is disposed against the inner wall surface of the mounting groove 5. In this application, the embedding groove 10 and the limiting post 11 are configured to match the shape and structure of the bushing, making the bushing more stable within the mounting groove 5, preventing displacement during drilling, and improving drilling accuracy. At the same time, this structure can accommodate bushings of different sizes, enhancing the versatility of the tooling.
[0042] A slot 12 is provided on the outer circumferential surface of the base 2, and the slot 12 communicates with the mounting groove 5. In this application, the base 2 has an overall cylindrical structure. If only the top surface is open, it would be inconvenient to remove the bushing after it is inserted. Therefore, the slot 12 is provided on the outer circumferential surface of the base 2. The design of the slot 12 provides more space for the bushing to be placed and removed, making it easier and faster for operators to install the bushing into or remove it from the mounting groove 5 of the base 2, thereby improving the efficiency of clamping and unloading.
[0043] The base 2 has an overall cylindrical structure and includes a base plate 13 and an outer ring 14. The slot 12 is formed on the outer ring 14, and several limiting holes 7 are provided on the outer circumferential surface of the base plate 13. The cylindrical structure of the base 2 can well adapt to the structure of the bushing, increasing the stability of the tooling. The slot 12 on the outer ring 14 facilitates the removal and placement of the bushing, while the limiting holes 7 on the outer circumferential surface of the base plate 13 provide multiple position options for fixing the base 2, ensuring that the base 2 can be stably fixed on the base plate 1 at different angles.
[0044] Four limiting holes 7 are evenly distributed on the outer circumference of the chassis 13, with an included angle of 90 degrees between any two adjacent limiting holes 7. In conjunction with the locking fastener 8, the base 2 can be temporarily locked at 90-degree intervals. This positioning fixture, used in conjunction with a single-axis bench drill, fulfills the functional requirement of drilling four holes sequentially after a single clamping, improving processing efficiency and ensuring angular accuracy between the holes.
[0045] The end of the locking fastener 8 is adapted to the structure of the limiting hole 7, and the locking fastener 8 is a ball screw. As a common fastener, the ball screw's end structure is adapted to the limiting hole 7, allowing for quick insertion or withdrawal from the limiting hole 7, thus enabling rapid locking and unlocking of the base 2. This locking fastener 8 is easy to operate, highly reliable, and can effectively improve the adjustment speed and stability of the tooling.
[0046] The base 2 has two positioning posts 17 spaced apart on its top surface. The cover plate 3 has corresponding positioning holes 18 on each positioning post 17. When the cover plate 3 is installed on the base 2, the positioning posts 17 pass through the positioning holes 18. The cooperation between the positioning posts 17 and the positioning holes 18 ensures the accurate positioning of the cover plate 3 when installed on the base 2, making the connection between the cover plate 3 and the base 2 more stable and reliable. This avoids problems such as insecure bushing clamping or drilling position deviation caused by cover plate 3 misalignment, thus improving processing quality and efficiency.
[0047] The cover plate 3 is provided with a plurality of guide holes 19. The guide holes 19 provide a guiding function for the drill bit of the single-axis bench drill, and can guide the drill bit to accurately align with the predetermined hole position on the bushing during the drilling process, ensuring the directional and positional accuracy of the drilling, reducing the risk of drill bit deflection and hole position deviation, and improving the quality and consistency of hole processing.
[0048] The cover plate 3 is provided with a locking hook 15, and the base 2 is provided with a corresponding locking buckle 16. The locking buckle 16 cooperates with the locking hook 15 to detachably fix the cover plate 3 to the base 2. The cooperation between the locking hook 15 and the locking buckle 16 provides a simple and reliable way to fix the cover plate 3, which can quickly fix the cover plate 3 to the base 2 or remove the cover plate 3 from the base 2. This detachable fixing method is not only easy to operate, but also ensures the connection strength between the cover plate 3 and the base 2, ensuring that the cover plate 3 will not loosen during drilling, thereby improving the compression stability of the bushing and improving the drilling quality.
[0049] The rest of the contents of Example 2 are the same as those of Example 1.
[0050] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.
Claims
1. A drill hole positioning tool for a bushing, characterized by, The base includes a substrate (1), a base (2) and a cover plate (3). The base (2) is mounted on the substrate (1) via a pivot (4). When the base (2) is subjected to force, it rotates around the pivot (4) on the substrate (1). The top surface of the base (2) is provided with a mounting groove (5) for mounting bushings. When the cover plate (3) is mounted on the base (2), it presses the bushing in the mounting groove (5) firmly. A fixing seat (6) is provided on the substrate (1). A number of limiting holes (7) are provided on the outer periphery of the base (2). A locking fastener (8) is installed on the fixing seat (6). The locking fastener (8) can be inserted into the limiting holes (7) that are moved to the fixing seat (6) to fix the base (2).
2. A bore positioning tool for a bushing as defined in claim 1, wherein, The pivot (4) is located at the central axis of the base (2), and the base (2) rotates around its central axis when subjected to force; a number of rotating handles (9) are provided on the outer circumferential surface of the base (2).
3. A bore positioning tool for a bushing as defined in claim 1, wherein, The bottom surface of the mounting groove (5) is provided with an embedding groove (10) and a limiting post (11). The embedding groove (10) is located at the center of the bottom surface of the mounting groove (5), and the limiting post (11) is set to fit against the inner wall surface of the mounting groove (5).
4. A bore positioning tool for a bushing as defined in claim 1, wherein, The base (2) has a slot (12) on its outer peripheral surface, and the slot (12) is connected to the mounting slot (5).
5. A bore location tool for a bushing as defined in claim 4 wherein, The base (2) is cylindrical in shape. The base (2) includes a base plate (13) and an outer ring (14). The slot (12) is opened on the outer ring (14). Several limiting holes (7) are provided on the outer circumferential surface of the base plate (13).
6. A bore location tool for a bushing as defined in claim 5 wherein, Four limiting holes (7) are evenly distributed on the outer circumference of the chassis (13), and the included angle between two adjacent limiting holes (7) is 90 degrees.
7. A bore positioning tool for a bushing as defined in claim 1, wherein, The end of the locking fastener (8) is adapted to the structure of the limiting hole (7), and the locking fastener (8) is a ball screw.
8. A bore positioning tool for a bushing as defined in claim 1, wherein, The top surface of the base (2) is provided with two positioning posts (17), which are spaced apart. The cover plate (3) is provided with positioning holes (18) corresponding to the positioning posts (17). When the cover plate (3) is installed on the base (2), the positioning posts (17) pass through the positioning holes (18).
9. A bore positioning tool for a bushing as defined in claim 1, wherein, The cover plate (3) is provided with several guide holes (19).
10. A bore positioning tool for a bushing as defined in claim 1, wherein, The cover plate (3) is provided with a locking hook (15), and the base (2) is provided with a buckle (16) corresponding to the locking hook (15). The buckle (16) and the locking hook (15) cooperate to detachably fix the cover plate (3) on the base (2).