Eccentric bushing parallelism detection tool
By combining the tooling mandrel, base plate, and push-lock assembly, the problems of hole wall wear and measurement error in the parallelism detection of eccentric sleeves in the prior art are solved, realizing efficient and accurate parallelism detection and reducing production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUXI LIJUN BEARING
- Filing Date
- 2025-06-10
- Publication Date
- 2026-04-17
AI Technical Summary
Existing technologies for detecting the parallelism of eccentric sleeves use gear runout detectors, which cause wear on the hole walls of the workpiece under test, reduce production efficiency, and cannot effectively avoid measurement errors.
The tooling mandrel, base plate, and push-lock assembly are used. The measurement error is eliminated by the tight fit between the tooling mandrel and the eccentric hole. The eccentric sleeve is tightened with a hex wrench to make the central axis of the eccentric hole parallel to the central axis of the tooling mandrel. The deviation is measured with a dial indicator to see if it is within the tolerance range.
It achieves efficient detection without hole wall scratches, reduces production costs, improves detection accuracy and efficiency, and avoids damage to the surface of the test piece.
Smart Images
Figure CN224136547U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of parts inspection, and in particular to the field of eccentric sleeve inspection technology, specifically a tooling for inspecting the parallelism of eccentric sleeves. Background Technology
[0002] To improve inspection efficiency, our company does not use coordinate measuring machines (CMMs) for the full inspection of the parallelism of eccentric sleeves. Instead, we use a gear runout tester. A coaxial conical bar is mounted on the left and right centers of the gear runout tester. The part to be tested is clamped onto the conical bar, ensuring that the central axis of the eccentric hole in the part to be tested coincides with the central axis of the conical bar. Then, a micrometer is used to measure the deviation between the left and right points of the outer contour of the eccentric sleeve to determine whether the parallelism of the part to be tested is qualified. During the inspection process using the above method, the part to be tested needs to be rotated and fitted onto the conical bar to form a tight fit. The outer wall of the conical bar will rub against the wall of the eccentric hole in the eccentric sleeve, causing wear on the hole wall. For parts with high surface smoothness requirements, scratches on the hole wall after inspection will cause rework, reducing production efficiency. Summary of the Invention
[0003] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide an eccentric sleeve parallelism detection tool to solve the difficulties of the prior art.
[0004] To achieve the above and other related objectives, this utility model provides a tooling for detecting the parallelism of an eccentric sleeve, comprising:
[0005] Gear runout tester 1, wherein the gear runout tester 1 has a top seat 11 on the left and right sides of the top, and a top 12 is inserted through the side of the top seat 11 that is close to each other;
[0006] Tooling mandrel 2, with mounting holes 21 on both the left and right sides, the mounting holes 21 being fitted onto the center 12;
[0007] The substrate 3 has a positioning arc hole 31 on its top, and the substrate 3 is sleeved on the outside of the tooling mandrel 2 through the positioning arc hole 31.
[0008] The push-lock assembly 4 has its top part inserted through one side of the substrate 3 and its bottom part disposed directly below the substrate 3.
[0009] According to the preferred embodiment, the central angle corresponding to the positioning arc hole 31 is 200°-360°.
[0010] According to the preferred embodiment, the push-lock assembly 4 includes:
[0011] Threaded hole 41, the threaded hole 41 is formed on the top side of the substrate 3;
[0012] A circular hole 42 is formed on the bottom side of one side of the substrate 3, and the top of the circular hole 42 communicates with the threaded hole 41;
[0013] The internal hexagonal hand-tightening pin 43 has an external thread in the middle section, and the middle section of the internal hexagonal hand-tightening pin 43 passes through the threaded hole 41.
[0014] Push block 44, which is disposed directly below the substrate 3, has a rounded bottom surface;
[0015] The grooved cylinder 45 is welded to one side of the top of the push block 44, and the top of the grooved cylinder 45 is stuck in the round hole 42.
[0016] Bearing 46, the outer ring of bearing 46 is interference-fitted and connected to the inner ring of groove cylinder 45, and the inner ring of bearing 46 is interference-fitted and connected to hexagonal hand-tightening pin 43.
[0017] According to the preferred embodiment, the diameter of the circular hole 42 is larger than the maximum diameter of the threaded hole 41, and the circular hole 42 and the threaded hole 41 are coaxially arranged.
[0018] According to a preferred embodiment, the substrate 3 and the push block 44 are provided with rounded corners around their perimeter.
[0019] This invention employs a gear runout tester, a tooling mandrel, a base plate, and a push-lock assembly. The eccentric hole of the eccentric sleeve is fitted onto the tooling mandrel. One side of the base plate is pressed against the inner wall of the eccentric sleeve to be tested. The hexagonal hand-tightening pin is rotated to make the push block press downwards against the inner wall of the eccentric sleeve's arc surface. A hexagonal wrench is then used to tighten the connection by turning it 30°. Under external force, the top of the eccentric hole is pressed tightly against the tooling mandrel, limiting the eccentric sleeve to the tooling mandrel. Simultaneously, the central axis of the eccentric hole is made parallel to the central axis of the tooling mandrel, eliminating measurement errors caused by the gap between the eccentric hole and the tooling mandrel due to tolerances. Subsequently, a dial indicator is used to mark points on the outer side of the eccentric sleeve to be tested, and the difference is calculated to see if it is within the tolerance range. Before testing, the tooling mandrel and push block need to be cleaned of dust from the eccentric hole and the inner wall of the groove of the part to be tested. The pressing method avoids scratching the hole wall of the eccentric hole sleeve to be tested.
[0020] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings, so as to facilitate an understanding of the features and advantages of the present invention. Attached Figure Description
[0021] Figure 1 The diagram shown is a three-dimensional structural schematic of this utility model;
[0022] Figure 2 The diagram shows the structure of the tooling mandrel and push-lock assembly set to be tested in this utility model.
[0023] Figure 3 The diagram shown is an enlarged three-dimensional structural diagram of the substrate and push-lock assembly in this utility model.
[0024] Figure 4 The diagram shown is an enlarged three-dimensional structural schematic of the pusher block in this utility model.
[0025] Figure 5 The diagram shown is a cross-sectional view of the pusher block in this utility model;
[0026] Figure 6 The diagram shown is an enlarged three-dimensional structural schematic of the substrate in this invention.
[0027] Figure 7 The diagram shown is a structural schematic of the test piece in this utility model.
[0028] Label Explanation
[0029] 1. Gear runout tester; 11. Center seat; 12. Center;
[0030] 2. Tooling mandrel; 21. Mounting hole;
[0031] 3. Substrate; 31. Positioning arc hole;
[0032] 4. Push lock assembly; 41. Threaded hole; 42. Round hole; 43. Hexagonal key hand-tightening pin; 44. Push block; 45. Groove cylinder; 46. Bearing. Detailed Implementation
[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0034] Compared to the embodiments shown in the accompanying drawings, feasible embodiments within the scope of protection of this utility model may have fewer components, have other components not shown in the drawings, different components, components arranged differently, or components with different connections, etc. Furthermore, two or more components shown in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.
[0035] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, “an” or “a” and similar terms do not necessarily indicate a quantity limitation. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.
[0036] This utility model proposes a tooling for detecting the parallelism of an eccentric sleeve, which is used in the detection process. This utility model does not limit the specifications of the eccentric sleeve, but the structure of the mandrel 2, base plate 3 and push-lock assembly 4 of this tooling is particularly suitable for detecting the parallelism of the eccentric sleeve in a gear runout checker.
[0037] In general, the eccentric sleeve parallelism detection fixture proposed in this utility model mainly includes: fixture mandrel 2, base plate 3, and push-lock assembly 4. (See also...) Figure 1 It shows the arrangement of the gear runout checker 1, tooling mandrel 2, base plate 3 and push lock assembly 4.
[0038] When using the eccentric sleeve parallelism testing fixture proposed in this utility model, the base plate 3 connected to the push-lock assembly 4 is mounted on the fixture mandrel 2, and the eccentric sleeve to be tested is placed as follows: Figure 2 The eccentric hole in the eccentric sleeve is fitted onto the tooling mandrel 2. One side of the substrate 3 is pressed against the inner wall of the eccentric sleeve to be tested. The hexagonal screw 43 is rotated so that the push block 44 presses down against the inner wall of the arc surface of the eccentric sleeve. The hexagonal wrench is turned 30 degrees to tighten it. Under the action of external force, the top of the eccentric hole is pressed tightly against the tooling mandrel 2, limiting the eccentric sleeve on the tooling mandrel 2. At the same time, the central axis of the eccentric hole is parallel to the central axis of the tooling mandrel 2, eliminating the measurement error caused by the gap between the eccentric hole and the tooling mandrel 2 due to the tolerance. Subsequently, a dial indicator is used to mark the left and right sides of the outer side of the eccentric sleeve to be tested to calculate whether the difference is within the tolerance range. Before testing, the tooling mandrel 2 and the push block 44 need to be cleaned of dust from the eccentric hole and the inner wall of the groove of the part to be tested. The pressing method will not cause scratches on the hole wall of the eccentric hole sleeve to be tested.
[0039] The aforementioned gear runout inspector 1 has a center seat 11 on the top left and right sides, and a center 12 is inserted on the side of the center seat 11 that is close to each other. The eccentric sleeve is inspected using the readily available gear runout inspector 1 in the company, which is used to detect gear runout error. There is no need to purchase professional equipment, which reduces the cost of parts production.
[0040] The aforementioned tooling mandrel 2 has mounting holes 21 on both the left and right sides. The mounting holes 21 are fitted onto the center 12. The outer diameter of the tooling mandrel 2 needs to be machined according to the minimum tolerance of the eccentric hole in the eccentric sleeve to be inspected.
[0041] The aforementioned substrate 3 is fitted onto the outside of the tooling mandrel 2 through the positioning arc hole 31. The central angle corresponding to the positioning arc hole 31 is 200°-360°. During the testing process, the tooling mandrel 2 needs to provide a certain support force to the substrate 3 to prevent the substrate 3 from shifting position during the tightening of the internal hexagonal hand-tightening pin 43.
[0042] The top of the aforementioned push-lock assembly 4 is inserted through one side of the substrate 3, and the bottom of the push-lock assembly 4 is located directly below the substrate 3. The push-lock assembly 4 includes: a threaded hole 41, a round hole 42, a hexagonal hand-tightening pin 43, a push block 44, a grooved cylinder 45, and a bearing 46. The threaded hole 41 is opened at the top of one side of the substrate 3, and the round hole 42 is opened at the bottom of one side of the substrate 3. The top of the round hole 42 communicates with the threaded hole 41. The diameter of the round hole 42 is larger than the maximum diameter of the threaded hole 41. The round hole 42 and the threaded hole 41 are coaxially arranged. The middle section of the hexagonal hand-tightening pin 43 is provided. The device has external threads, and the middle section of the internal hexagonal hand-tightening pin 43 passes through the threaded hole 41. A push block 44 is set directly below the substrate 3. The bottom of the push block 44 is an arc surface. The groove cylinder 4545 is welded to one side of the top of the push block 44. The top of the groove cylinder 4545 is stuck in the round hole 42. The outer ring of the bearing 46 is interference-fitted with the inner ring of the groove cylinder 4545. The inner ring of the bearing 46 is interference-fitted with the internal hexagonal hand-tightening pin 43. The substrate 3 and the push block 44 are rounded around the edges. Right angles are not easy to handle, and if the test piece is bumped, the surface of the test piece will be damaged.
[0043] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.
Claims
1. An eccentric sleeve parallelism detection tool, characterized in that, include: Gear runout tester (1), the gear runout tester (1) has a top seat (11) on the left and right sides of the top, and a top (12) is inserted on the side of the top seat (11) that is close to each other; Tooling mandrel (2), the tooling mandrel (2) has mounting holes (21) on the left and right sides, the mounting holes (21) are fitted onto the center (12); The substrate (3) has a positioning arc hole (31) on its top, and the substrate (3) is sleeved on the outside of the tooling mandrel (2) through the positioning arc hole (31). The push-lock assembly (4) has its top part inserted through one side of the substrate (3) and its bottom part disposed directly below the substrate (3).
2. The eccentric sleeve parallelism detection tool of claim 1, wherein, The central angle corresponding to the positioning arc hole (31) is 200°-360°.
3. The eccentric sleeve parallelism detection tool of claim 2, wherein, The push-lock assembly (4) includes: A threaded hole (41) is provided on the top side of the substrate (3); A circular hole (42) is formed on the bottom side of the substrate (3), and the top of the circular hole (42) communicates with the threaded hole (41); The internal hexagonal hand-tightening pin (43) has an external thread in the middle section and the middle section of the internal hexagonal hand-tightening pin (43) passes through the threaded hole (41); Push block (44), the push block (44) is located directly below the substrate (3), and the bottom of the push block (44) is an arc surface; The groove (45) is welded to one side of the top of the push block (44), and the top of the groove (45) is stuck in the round hole (42); The bearing (46) has an outer ring that is interference-fitted to the inner ring of the grooved cylinder (45), and the inner ring of the bearing (46) is interference-fitted to the internal hexagonal hand-tightening pin (43).
4. The eccentric sleeve parallelism detection tool of claim 3, wherein, The diameter of the circular hole (42) is greater than the maximum diameter of the threaded hole (41).
5. The eccentric sleeve parallelism detection tool of claim 4, wherein, The circular hole (42) and the threaded hole (41) are coaxially arranged.
6. The eccentric sleeve parallelism detection tool of claim 5, wherein, The substrate (3) and push block (44) are provided with rounded corners around their perimeter.