Inner taper size detection positioning gauge
By optimizing the design of the handle assembly and guide positioning assembly, the problems of insertion deviation and bumps of plug gauges have been solved, enabling efficient and accurate detection of internal tapered holes, and improving detection accuracy and ease of operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU DIWEI HIGH VOLTAGE TECH CO LTD
- Filing Date
- 2025-10-13
- Publication Date
- 2026-06-19
Smart Images
Figure CN224382373U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of detection and positioning fixture technology, specifically to an inner cone-shaped size detection and positioning fixture. Background Technology
[0002] A measurement fixture is a measuring tool used to inspect the size and positional accuracy of an object. It typically consists of a measuring part that matches the object being measured and a positioning device. Measurement fixtures ensure that objects meet design requirements during production, guaranteeing assembly accuracy and performance, thereby improving product quality and production efficiency.
[0003] The internal conical size detection and positioning fixture is a tool specifically used to measure and verify the geometric dimensions, taper accuracy, and positional relationships of internal conical structures (such as internal conical holes and internal conical surfaces) of mechanical parts. It is widely used in mechanical manufacturing, quality inspection, and other fields, mainly to ensure that the machining of internal conical structures meets design requirements and to guarantee assembly accuracy and performance.
[0004] When inspecting the conical structure inside a mechanical part, a plug gauge corresponding to the taper of the side is evenly coated with paint using a coloring method. The coated plug gauge is then gently inserted into the conical flared end to be measured, ensuring full contact between the plug gauge and the surface being measured. After insertion, the plug gauge is rotated and lapped at an angle of 60-120 degrees. After lapping, the plug gauge is carefully removed, and the wiping marks on the surface of the plug gauge are observed. The distribution of these marks and the contact area are used to determine the taper and shape accuracy of the conical flared end of the mechanical part. However, during manual inspection, various factors can cause deviations between the insertion axis of the plug gauge and the center of the conical hole inside the mechanical part. Furthermore, the conical surface of the plug gauge may collide with the interior of the mechanical part, causing the paint on the conical surface to peel off prematurely, affecting the judgment of the accuracy of the conical hole inside the mechanical part. Therefore, to address these issues, a positioning fixture for detecting the size of an internal taper is proposed. Utility Model Content
[0005] The purpose of this utility model is to provide an internal conical size detection and positioning fixture to solve the problem that during manual inspection, various factors inevitably cause the insertion axis of the plug gauge to deviate from the center of the internal conical hole of the mechanical part, and the conical surface of the plug gauge is prone to collision with the inside of the mechanical part, causing the coating on the conical surface of the plug gauge to fall off prematurely, affecting the judgment of the accuracy of the internal conical hole of the mechanical part.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A size detection and positioning fixture for an inner cone includes a handle assembly and a detection cone. The detection cone is fixedly connected to the lower end of the handle assembly, and a guide positioning assembly is fixedly connected to the lower end of the detection cone. The handle assembly includes a handle body with a sliding cavity inside. A hollow slide rod is slidably connected to the inner side of the sliding cavity. A pressing plate is fixedly connected to the outer side of the upper end of the hollow slide rod, and a ring plate is fixedly connected to the outer side of the lower end of the hollow slide rod. A piston sleeve is fitted on the outer side of the ring plate. The guide positioning assembly includes a guide post with a limit ring embedded and fixedly connected inside. A positioning slide cylinder is slidably connected inside the limit ring, and a ball is slidably connected inside the positioning slide cylinder. A force-receiving air cavity is opened inside the positioning slide cylinder, and a limit ring is fixedly connected to the outer side of the positioning slide cylinder. A sealing rubber ring is fitted inside the limit ring.
[0008] As a further optimization of this utility model, the inner side of the detection cone has a vertical through hole, the inner side of the guide post has a vertical one-way opening hole, and the sliding cavity on the inner side of the handle body, the vertical through hole on the inner side of the detection cone, and the one-way opening hole on the inner side of the guide post are on the same vertical axis and are interconnected.
[0009] As a further optimization of this utility model, four sliding holes are evenly distributed on the inner side of the guide post with the guide post axis as the center. The sliding holes on the inner side of the guide post are all interconnected through vertical unidirectional openings on the inner side of the guide post.
[0010] As a further optimization of this utility model, the hollow slide rod has a maximum diameter that is one-third the maximum diameter of the piston sleeve. The hollow slide rod slides close to the upper one-third section of the slide cavity, and the piston sleeve slides in the lower two-thirds section of the slide cavity. The upper and lower ends of the hollow slide rod are on the same horizontal plane as the upper end of the pressing plate and the lower end of the piston sleeve, respectively. The piston sleeve is in close contact with the inside of the handle body.
[0011] As a further optimization of this utility model, the diameter of the guide post is the same as the minimum diameter of the detection cone, the curvature of the outer curved surface of the guide post is the same as the curvature of the curved surface of the limiting ring on the side away from the center of the guide post, the cross-section of the limiting ring is "T" shaped, the limiting ring is completely hidden inside the guide post, and the section of the limiting ring near the center of the guide post is set in a sliding hole opened inside the guide post.
[0012] As a further optimization of this utility model, the limiting ring slides in a sliding hole opened inside the guide post through a sealing rubber ring, the side of the limiting ring near the center of the guide post is on the same plane as one end of the positioning slide cylinder, and the sealing rubber ring is set at the horizontal center position of the limiting ring.
[0013] As a further optimization of this utility model, the following features are provided: the force-bearing air chamber inside the positioning slide cylinder is a one-way opening, the opening of the force-bearing air chamber inside the positioning slide cylinder faces towards the center of the guide post, the force-bearing air chamber is flared from away from the center of the guide post towards the center of the guide post, the maximum opening diameter of the force-bearing air chamber is the same as the diameter of the connecting hole between the inner sliding hole of the guide post and the vertical one-way opening hole, one-third of the ball bearing inside the positioning slide cylinder protrudes from the end of the positioning slide cylinder away from the center of the guide post, and the ball bearing is completely hidden inside the guide post.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] In this invention, through the optimized design of the handle assembly, detection cone, and guide positioning assembly, efficient and accurate detection is achieved. The connection between the sliding cavity inside the handle assembly, the vertical through hole of the detection cone, and the one-way opening hole of the guide post ensures smooth gas flow, laying the foundation for detection initiation. The evenly distributed sliding holes inside the guide post allow compressed gas to enter the force-bearing gas chamber of the positioning slide evenly, improving the stability and positioning accuracy of the positioning slide. The diameter ratio and sliding setting of the hollow slide rod and piston sleeve enhance gas compression efficiency and the operational reliability of the handle assembly. The matching of the diameter and curvature of the guide post and the detection cone, as well as the concealed design of the limiting ring, ensures a uniform appearance and structural stability of the components. The cooperation between the limiting ring and the sealing rubber ring prevents gas leakage and restricts the position of the positioning slide, improving movement accuracy. The flared design of the force-bearing gas chamber and the reasonable setting of the ball bearings enable precise positioning and movement of the positioning slide, improving detection accuracy. The overall design optimizes the detection process, improves operational convenience, and the reasonable structural design makes operation convenient, enabling rapid and accurate detection of the inner conical hole size, thus improving detection efficiency and reliability. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0017] Figure 2 This is a schematic diagram of the internal structure of the detection cone of this utility model;
[0018] Figure 3 This is a schematic diagram of the internal structure of the handle body of this utility model;
[0019] Figure 4 This is a schematic diagram of the internal structure of the hollow slide bar of this utility model;
[0020] Figure 5 This is a schematic diagram of the cross-sectional structure of the guide column of this utility model;
[0021] Figure 6 This utility model Figure 5 Schematic diagram of the structure at point A in the middle;
[0022] Figure 7 This utility model Figure 5 Schematic diagram of the structure at point B;
[0023] Figure 8 This is a schematic diagram of the exploded structure of the positioning slide of this utility model;
[0024] Figure 9 This is a schematic diagram of the internal structure of the positioning slide of this utility model.
[0025] In the diagram: 1. Handle assembly; 11. Handle body; 12. Slide cavity; 13. Hollow slide rod; 14. Press plate; 15. Ring plate; 16. Piston sleeve;
[0026] 2. Inspect the cone;
[0027] 3. Guide positioning assembly; 31. Guide post; 32. Limiting ring; 33. Positioning slide; 34. Ball bearing; 35. Force-bearing air chamber; 36. Limiting ring; 37. Sealing rubber ring. Detailed Implementation
[0028] 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.
[0029] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0030] Please see Figure 1-9 This utility model provides a technical solution:
[0031] A size detection and positioning fixture for an inner cone includes a handle assembly 1 and a detection cone 2. The detection cone 2 is fixedly connected to the lower end of the handle assembly 1, and a guide positioning assembly 3 is fixedly connected to the lower end of the detection cone 2. The handle assembly 1 includes a handle body 11, a sliding cavity 12 is formed inside the handle body 11, a hollow slide rod 13 is slidably connected inside the sliding cavity 12, a pressing plate 14 is fixedly connected to the outer side of the upper end of the hollow slide rod 13, a ring plate 15 is fixedly connected to the outer side of the lower end of the hollow slide rod 13, and a piston sleeve 16 is sleeved on the outer side of the ring plate 15. The guide positioning assembly 3 includes a guide post 31, a limiting ring 32 is embedded and fixedly connected inside the guide post 31, a positioning cylinder 33 is slidably connected inside the limiting ring 32, a ball bearing 34 is slidably connected inside the positioning cylinder 33, a force-bearing air chamber 35 is formed inside the positioning cylinder 33, a limiting ring 36 is fixedly connected to the outer side of the positioning cylinder 33, and a sealing rubber ring 37 is sleeved on the inner side of the limiting ring 36.
[0032] As a further implementation of this solution, a vertical through hole is opened on the inner side of the detection cone 2, and a vertical one-way opening hole is opened on the inner side of the guide post 31. The sliding cavity 12 on the inner side of the handle body 11, the vertical through hole on the inner side of the detection cone 2, and the one-way opening hole on the inner side of the guide post 31 are on the same vertical axis and are interconnected. This ensures the smooth flow of gas in the area connected by the inner sides of the handle body 11, the detection cone 2, and the guide post 31. This lays the foundation for the gas to be compressed and accurately pushed into the sliding hole of the guide post 31 when the pressing plate 14 drives the hollow slide rod 13 to slide, effectively ensuring the stable start of the entire detection and positioning process.
[0033] As a further implementation of this solution, four sliding holes are evenly distributed on the inner side of the guide post 31 with the axis of the guide post 31 as the center. The sliding holes on the inner side of the guide post 31 are all interconnected through the vertical one-way openings on the inner side of the guide post 31, so that the compressed gas can enter the force-bearing air chamber 35 inside each positioning slide cylinder 33 evenly and stably. This ensures the uniformity and synchronization of the force on the four positioning slide cylinders 33 inside the guide post 31, effectively improving the stability of the movement of the positioning slide cylinders 33 and the precise positioning effect of the entire guide positioning assembly 3 on the conical hole inside the mechanical part.
[0034] As a further implementation of this solution, the maximum diameter of the hollow slide rod 13 is one-third of the maximum diameter of the piston sleeve 16. The hollow slide rod 13 slides tightly against the upper one-third section of the slide cavity 12, while the piston sleeve 16 slides in the lower two-thirds section of the slide cavity 12. The upper and lower ends of the hollow slide rod 13 are on the same horizontal plane as the upper end of the pressing plate 14 and the lower end of the piston sleeve 16, respectively. The piston sleeve 16 is tightly attached to the inside of the handle body 11, allowing the hollow slide rod 13 to slide flexibly in the upper one-third section of the slide cavity 12. At the same time, the piston sleeve 16 slides tightly against the lower two-thirds section of the slide cavity 12 and fits tightly with the inside of the handle body 11. This structural design not only ensures a stable connection and transmission between the hollow slide rod 13 and the piston sleeve 16, but also effectively improves the efficiency and stability of gas compression in the slide cavity 12, ensuring the reliability and precise control of the entire handle assembly 1 during operation.
[0035] As a further implementation of this solution, the diameter of the guide post 31 is the same as the minimum diameter of the detection cone 2. The curvature of the outer curved surface of the guide post 31 is the same as the curvature of the curved surface of the limiting ring 32 on the side away from the center of the guide post 31. The cross-section of the limiting ring 32 is "T" shaped. The limiting ring 32 is completely hidden inside the guide post 31. The section of the limiting ring 32 near the center of the guide post 31 is set in the sliding hole opened inside the guide post 31, making the guide post 31 and the detection cone 2 more coordinated and unified in appearance. At the same time, the limiting ring 32 can slide stably in the sliding hole inside the guide post 31 and effectively limit the position of the positioning slide cylinder 33, preventing it from moving excessively and detaching from the guide post 31, thus ensuring the structural stability and reliability of the entire guide positioning assembly 3.
[0036] As a further implementation of this solution, the limiting ring 36 slides in the sliding hole opened inside the guide post 31 through the sealing rubber ring 37. The side of the limiting ring 36 near the center of the guide post 31 is on the same plane as one end of the positioning slide cylinder 33. The sealing rubber ring 37 is set at the horizontal center position of the limiting ring 36, so that the positioning slide cylinder 33 can maintain stable sealing when moving in the sliding hole, effectively preventing gas leakage. At the same time, the cooperation between the limiting ring 36 and the sliding hole inside the guide post 31 can play a good limiting role for the positioning slide cylinder 33, preventing it from shifting or falling off during movement, and improving the accuracy and stability of the movement of the positioning slide cylinder 33.
[0037] As a further implementation of this solution, the force-receiving air chamber 35 inside the positioning slide cylinder 33 has a one-way opening. The opening of the force-receiving air chamber 35 inside the positioning slide cylinder 33 faces towards the center of the guide post 31. The force-receiving air chamber 35 flares out from away from the center of the guide post 31 towards the center of the guide post 31. The maximum opening diameter of the force-receiving air chamber 35 is the same as the diameter of the connecting hole between the sliding hole inside the guide post 31 and the vertical one-way opening hole. One-third of the ball bearing 34 inside the positioning slide cylinder 33 protrudes from the end of the positioning slide cylinder 33 away from the center of the guide post 31. The ball bearing 34 is completely hidden inside the guide post 31, so that the force-receiving air chamber 35 can effectively receive the thrust of the compressed gas and stably push the positioning slide cylinder 33 to move. At the same time, the ball bearing 34 can closely contact and roll with the inner conical curved surface of the mechanical part to be tested during the movement of the positioning slide cylinder 33, thereby realizing the positioning slide cylinder 33 on the guide post 31. The precise positioning and movement on the inside effectively improves the accuracy and reliability of this inspection and positioning fixture for inspecting the tapered holes inside mechanical parts.
[0038] Workflow: When using this inner cone-shaped detection and positioning fixture, the user holds the handle body 11 on the outside and presses their thumb on the pressing plate 14 at the upper end of the handle body 11, so that the user's thumb pad completely covers the upper side of the pressing plate 14, while completely blocking the upper opening of the hollow slide rod 13 fixedly connected to the inner side of the pressing plate 14. This isolates the sliding cavity 12 opened on the inner side of the handle body 11 from the outside air. Then, the user presses the pressing plate 14 towards the detection cone 2. The pressing plate 14 drives the hollow slide rod 13, which is fixedly connected to it, to slide inside the slide cavity 12. At the same time, the slide cavity 12 drives the piston sleeve 16, which is sleeved on the outside of the ring plate 15, to slide tightly against the inside of the slide cavity 12 through the ring plate 15 fixedly connected to its outside. Under the sliding action of the piston sleeve 16 inside the slide cavity 12, the gas inside the area connected by the inner side of the handle body 11, the detection cone 2, and the inner side of the guide post 31 is compressed and gradually pushed into the four horizontally evenly distributed sliding holes opened inside the guide post 31.
[0039] The compressed gas entering the sliding hole of the guide post 31 then enters the force-receiving gas chamber 35 inside the positioning slide cylinder 33. The inner side of the force-receiving gas chamber 35 is flared, which can effectively receive the compressed gas, so that it can be stably pushed inside the guide post 31 under the continuous force of the compressed gas. During the thrust of the positioning slide cylinder 33 by the compressed gas, the positioning slide cylinder 33 moves linearly close to the sliding hole inside the force-receiving gas chamber 35 through the sealing rubber ring 37 on the outside of the fixedly connected limiting ring 36. The sealing rubber ring 37 can play a good sealing role to ensure that the positioning slide cylinder 33 can withstand a relatively stable and continuous thrust of compressed gas. At this time, the positioning slide 33 slides inside the limiting ring 32 that is embedded and fixedly connected inside the guide post 31. The limiting ring 32 can cooperate with the limiting ring 36 on the outside of the positioning slide 33 to restrict it and prevent the positioning slide 33 from being pushed out of the guide post 31 by excessive compressed gas. After the four evenly distributed positioning slides 33 protrude from one side of the guide post 31 by an appropriate length, paint is evenly applied to the outside of the detection cone 2 by the coloring method. The user can then gradually place the inner cone size detection positioning gauge into the inner side of the mechanical part with the inner cone hole that needs to be detected. At this time, the ball 34 inside the four positioning slides 33 first contacts the inner cone curved surface of the mechanical part to be detected.
[0040] As the detection cone 2 gradually penetrates deeper, the ball bearing 34 rolls close to the inner conical surface of the mechanical part being tested, influenced by the conical curved surface. Simultaneously, the force-bearing air chamber 35 exerts a passive thrust on the positioning slide cylinder 33, causing all four positioning slide cylinders 33 to move towards the center of the guide post 31. Meanwhile, the gas inside the guide post 31 is pushed back into the slide cavity 12. Under the action of this reverse-push gas, the piston sleeve 16 is moved an appropriate distance away from the detection cone 2, thus ensuring the detection cone... The precise positioning of the cone 2 within the conical hole of the mechanical part ensures that after the ball bearing 34 is completely concealed within the guide post 31, the guide post 31 is precisely engaged in the smallest diameter conical hole on the inner side of the mechanical part to be inspected. This facilitates a smooth transition between the subsequent inspection cone 2 and the inner conical surface of the mechanical part to be inspected, allowing the device to better inspect the conical shape within the mechanical part. It also prevents premature contact between the outer side of the inspection positioning fixture and the inner conical surface of the mechanical part to be inspected, ensuring the integrity of the coating on the outer side of the inspection cone 2.
[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A size detection and positioning fixture for an inner cone, comprising a handle assembly (1) and a detection cone (2), characterized in that: The lower end of the handle assembly (1) is fixedly connected to a detection cone (2), and the lower end of the detection cone (2) is fixedly connected to a guide positioning assembly (3). The handle assembly (1) includes a handle body (11), a sliding cavity (12) is provided on the inner side of the handle body (11), a hollow slide rod (13) is slidably connected to the inner side of the sliding cavity (12), a pressing plate (14) is fixedly connected to the outer side of the upper end of the hollow slide rod (13), a ring plate (15) is fixedly connected to the outer side of the lower end of the hollow slide rod (13), and a piston sleeve (16) is sleeved on the outer side of the ring plate (15). The guide positioning component (3) includes a guide post (31), a limiting ring (32) is embedded and fixedly connected to the inner side of the guide post (31), a positioning slide cylinder (33) is slidably connected to the inner side of the limiting ring (32), a ball bearing (34) is slidably connected to the inner side of the positioning slide cylinder (33), a force-bearing air chamber (35) is opened on the inner side of the positioning slide cylinder (33), a limiting ring (36) is fixedly connected to the outer side of the positioning slide cylinder (33), and a sealing rubber ring (37) is sleeved on the inner side of the limiting ring (36).
2. The internal cone-shaped size detection and positioning fixture according to claim 1, characterized in that: The inner side of the detection cone (2) has a vertical through hole, and the inner side of the guide post (31) has a vertical one-way opening hole. The sliding cavity (12) on the inner side of the handle body (11), the vertical through hole on the inner side of the detection cone (2), and the one-way opening hole on the inner side of the guide post (31) are on the same vertical axis and are interconnected.
3. The internal cone-shaped size detection and positioning fixture according to claim 1, characterized in that: The inner side of the guide post (31) has four sliding holes evenly distributed around the axis of the guide post (31) on the same horizontal plane. The sliding holes on the inner side of the guide post (31) are all interconnected through the vertical one-way openings on the inner side of the guide post (31).
4. The internal cone-shaped size detection and positioning fixture according to claim 1, characterized in that: The maximum diameter of the hollow slide rod (13) is one-third of the maximum diameter of the piston sleeve (16). The hollow slide rod (13) slides close to the upper one-third section of the slide cavity (12), and the piston sleeve (16) slides in the lower two-thirds section of the slide cavity (12). The upper and lower ends of the hollow slide rod (13) are on the same horizontal plane as the upper end of the pressing plate (14) and the lower end of the piston sleeve (16), respectively. The piston sleeve (16) is in close contact with the inside of the handle body (11).
5. The internal cone-shaped size detection and positioning fixture according to claim 3, characterized in that: The diameter of the guide post (31) is the same as the minimum diameter of the detection cone (2). The curvature of the outer surface of the guide post (31) is the same as the curvature of the side of the limiting ring (32) away from the center of the guide post (31). The cross-section of the limiting ring (32) is "T" shaped. The limiting ring (32) is completely hidden inside the guide post (31). The section of the limiting ring (32) near the center of the guide post (31) is set in a sliding hole opened inside the guide post (31).
6. The internal cone-shaped size detection and positioning fixture according to claim 1, characterized in that: The limiting ring (36) slides in the sliding hole opened inside the guide post (31) through the sealing rubber ring (37). The side of the limiting ring (36) near the center of the guide post (31) is on the same plane as one end of the positioning slide cylinder (33). The sealing rubber ring (37) is set at the horizontal center position of the limiting ring (36).
7. The internal cone-shaped size detection and positioning fixture according to claim 5, characterized in that: The pressure-receiving air chamber (35) opened inside the positioning slide cylinder (33) is a one-way opening. The opening of the pressure-receiving air chamber (35) inside the positioning slide cylinder (33) faces the direction close to the center of the guide post (31). The pressure-receiving air chamber (35) is flared from the center away from the center of the guide post (31) to the center close to the center of the guide post (31). The maximum opening diameter of the pressure-receiving air chamber (35) is the same as the diameter of the connecting hole between the inner sliding hole of the guide post (31) and the vertical one-way opening hole. One-third of the ball (34) inside the positioning slide cylinder (33) protrudes from the end of the positioning slide cylinder (33) away from the center of the guide post (31). The ball (34) is completely hidden inside the guide post (31).