Auxiliary testing fixture for measuring internal spline for shaft gear
By designing an auxiliary fixture for measuring internal splines of shafts and teeth, the problem of detection error caused by the inconsistency between the auxiliary fixture and the part machining positioning was solved, thus achieving accuracy of the detection results and simplifying the measurement process.
Patent Information
- Application Number
- CN202423295195.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-30
AI Technical Summary
In existing testing methods, the clamping and positioning methods and positioning references of the measuring auxiliary gauges are inconsistent with those of the parts during the machining process, resulting in large errors in the testing results.
An auxiliary inspection tool for measuring internal splines of shaft teeth was designed, including components such as a positioning frame, positioning rod, centering taper pin and pressure ring. Through precise positioning and fixing structure, the consistency between the inspection datum and the machining datum is ensured.
It achieves high accuracy in test results, reduces errors, simplifies the measurement process, has a simple and reliable structure, and is easy to use.
Smart Images
Figure CN223691641U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of automobile parts, and relates to an auxiliary device for shaft tooth detection, in particular to an inner spline measurement auxiliary gauge for shaft tooth. BACKGROUND
[0002] With the higher and higher manufacturing precision requirement of automobile industry parts, the quality control of shaft parts, especially the parts with inner spline structure, becomes increasingly important. The existing detection method usually borrows a simple measurement auxiliary gauge, but the detection process often leads to large detection result error due to the inconsistent clamping and positioning mode and positioning reference of the measurement auxiliary gauge and the part machining process, thereby affecting the measurement result. SUMMARY
[0003] In view of the deficiencies in the prior art, the utility model aims to provide an inner spline measurement auxiliary gauge for shaft tooth, which solves the technical problem of large detection result error due to the inconsistent clamping and positioning mode and positioning reference of the measurement auxiliary gauge and the part machining process in the prior art.
[0004] In order to solve the above technical problems, the utility model adopts the following technical scheme:
[0005] An inner spline measurement auxiliary gauge for shaft tooth comprises a positioning frame, the positioning frame comprises a positioning frame bottom plate, a pair of positioning rods are integrally arranged on the positioning frame bottom plate, and the pair of positioning rods are arranged in parallel; a shaft tooth to be detected is arranged between the pair of positioning rods; the positioning frame bottom plate is installed on a base, a centering taper pin is arranged at the center of the top end of the base, the centering taper pin is coaxially arranged with the shaft tooth to be detected, the top of the centering taper pin extends out of the base and into the bottom end of the shaft tooth to be detected; a baffle is installed at the center of the top end of the base, the baffle is arranged inside the base and below the centering taper pin; a fixing bolt is installed at the center of the baffle, and the fixing bolt connects the baffle and the centering taper pin; a positioning ring is fixedly arranged between the top ends of the pair of positioning rods, the top end of the shaft tooth to be detected passes through the positioning ring and extends out of the top end of the positioning frame; and a pressing ring is rotatably arranged outside the top end of the pair of positioning rods.
[0006] The utility model also has the following technical features:
[0007] The outer side surface of the positioning ring is a circular truncated cone surface, the taper of the circular truncated cone surface is 20°, and the inner side surface of the positioning rod is matched with the outer side surface of the positioning ring.
[0008] The centering taper pin comprises an integrally arranged centering taper pin center and a centering taper pin base, the centering taper pin base is arranged in the base, and the centering taper pin center extends into the bottom end of the shaft tooth to be detected.
[0009] The outer side surface of the centering cone pin top is a conical surface, and the taper of the conical surface is 60 degrees.
[0010] The center of the centering cone pin base is provided with a threaded hole, and a fixing bolt is arranged in the threaded hole.
[0011] The outer side of the positioning rod top is provided with external threads, and the inner side of the compression ring is provided with internal threads.
[0012] The base is internally provided with an operation hole.
[0013] The outer side surface of the compression ring is provided with knurling.
[0014] Compared with the prior art, the utility model has the following technical effects:
[0015] (I) The measuring auxiliary gauge is used for auxiliary positioning of gear measuring instrument part detection, can guarantee that the detection reference and the machining reference are unified, and can further reduce detection error.
[0016] (II) The measuring auxiliary gauge is light and simple in structure, reliable, convenient to use, and can be reliably positioned by manually rotating the compression ring after placing the shaft tooth to be detected. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is an overall structural schematic view of the shaft tooth internal spline measuring auxiliary gauge.
[0018] Figure 2 It is a sectional view of the shaft tooth internal spline measuring auxiliary gauge.
[0019] The meanings of the various reference numerals in the drawings are as follows: 1-positioning frame, 2-base, 3-centering cone pin, 4-baffle, 5-fixing bolt, 6-positioning ring, 7-compression ring, 8-operation hole, 9-shaft tooth to be detected.
[0020] 101-positioning frame bottom plate, 102-positioning rod.
[0021] 301-centering cone pin top, 302-centering cone pin base.
[0022] The specific content in the utility model is further explained and described in detail in combination with the following embodiments. DETAILED DESCRIPTION
[0023] It should be noted that all the components in the utility model, without special description, adopt the components known in the art, for example: the shaft tooth to be detected 9 is a conventional shaft tooth known in the prior art.
[0024] The following gives specific embodiments in the utility model, it is explained that the utility model in the present application is not limited to the following specific embodiments, equivalent transformations made on the basis of the technical solutions of the present application all fall within the scope of protection of the utility model.
[0025] Embodiments:
[0026] The embodiment gives a kind of auxiliary measuring tool for measuring internal spline of shaft gear, as shown in Figure 1 And Figure 2 It includes positioning frame 1;Positioning frame 1 includes positioning frame bottom plate 101, a pair of positioning rods 102 are integrally arranged on positioning frame bottom plate 101, and the pair of positioning rods 102 are arranged in parallel;A pair of positioning rods 102 are provided with the shaft gear 9 to be detected between them;Positioning frame bottom plate 101 is installed on base 2, and the center of the top of base 2 is provided with centering taper pin 3, and centering taper pin 3 is coaxially arranged with the shaft gear 9 to be detected, and the top of centering taper pin 3 exceeds base 2 and extends into the bottom end of the shaft gear 9 to be detected;The center of the top of base 2 is provided with baffle 4, and baffle 4 is located inside the base and is arranged below centering taper pin 3;The center of baffle 4 is provided with fixed bolt 5, and fixed bolt 5 connects baffle 4 and centering taper pin 3;A pair of positioning rods 102 are fixedly provided with positioning ring 6 between the top ends thereof, and the top end of the shaft gear 9 to be detected passes through positioning ring 6 and extends out of the top end of positioning frame 1;A pair of positioning rods 102 are rotatably provided with pressing ring 7 outside the top end thereof.
[0027] In the embodiment, positioning frame 1 is used for preliminarily fixing the shaft gear 9 to be detected, and positioning frame 1 is connected with base 2 through bolt, and the center hole of positioning frame bottom plate 101 and the outer circle of base 2 are matched through matching grinding to ensure the matching precision.Centering taper pin 3 is used for positioning the shaft gear 9 to be detected, and is fixedly installed on base 2 through baffle 4 and fixed bolt 5, and centering taper pin 3 and base 2 are matched through matching grinding to ensure the matching precision.Positioning ring 6 is connected with the inner wall of positioning frame 1 by rubber, and the inner hole of positioning ring 6 is used for positioning the outer circle of the shaft gear 9 to be detected.Pressing ring 7 is used for extruding positioning rod 102 and positioning ring 6.
[0028] As a specific scheme of the embodiment, the outer side surface of positioning ring 6 is a circular truncated cone surface, the taper of the circular truncated cone surface is 20°, and the inner side surface of positioning rod 102 matches the outer side surface of positioning ring 6.In the embodiment, positioning ring 6 is connected with the inner wall of positioning frame 1 by rubber, pressing ring 7 is rotated to press positioning ring 6 by using the inner thread thereof, and under the action of the taper surface, the inner hole of positioning ring 6 is reduced and tightly holds the outer circle of the shaft gear 9 to be detected.
[0029] As a specific scheme of the embodiment, the centering taper pin 3 comprises an integrated centering taper pin tip 301 and a centering taper pin base 302, the centering taper pin base 302 is arranged in the base 2, and the centering taper pin tip 301 extends into the bottom end of the shaft tooth 9 to be detected; the outer side of the centering taper pin tip 301 is a conical surface, and the taper of the conical surface is 60°. The design of the conical surface can ensure that the centering taper pin 3 cooperates with the shaft tooth 9 to be detected.
[0030] As a specific scheme of the embodiment, an M5 threaded hole is arranged at the center of the centering taper pin base 302, and a fixing bolt 5 is arranged in the threaded hole.
[0031] As a specific scheme of the embodiment, an M80 external thread is arranged at the top of the positioning rod 102, and an internal thread is arranged at the inner side of the pressing ring 7. In the embodiment, the positioning rod 102 and the pressing ring 7 are fixedly arranged through the internal and external thread design.
[0032] As a specific scheme of the embodiment, an operation hole 8 is arranged in the base, and the operation hole 8 facilitates the operator to put his hand in and tighten the fixing bolt 5.
[0033] As a specific scheme of the embodiment, the outer side of the pressing ring 7 is provided with knurling for increasing friction.
[0034] As a specific scheme of the embodiment, the positioning ring 6 is made of an elastic material known in the prior art, for example, rubber.
[0035] The assembling and working process of the utility model is as follows:
[0036] Firstly, before detection, the 60° conical surface of the centering taper pin tip 301 and the 20° conical surface of the positioning rod 102 and the bottom surface of the base 2 are cleaned to ensure that the surfaces are clean and free of impurities.
[0037] Secondly, the centering taper pin 3 is arranged on the base 2, the baffle 4 is preliminarily fixed in the base 2, and the fixing bolt 5 is tightened to completely fix the centering taper pin 3 and the baffle 4.
[0038] Thirdly, the shaft tooth 9 to be detected is lightly placed in the auxiliary gauge, and the center hole of the shaft tooth 9 to be detected is attached to the 60° conical surface of the centering taper pin tip 301.
[0039] Fourthly, the pressing ring 7 is rotated and the positioning ring 6 is pressed tightly to ensure that the shaft tooth 9 to be detected is reliably clamped.
[0040] Fifthly, the auxiliary gauge and the shaft tooth 9 to be detected are placed on the gear measuring instrument, the gear measuring instrument side head is connected with the shaft tooth 9 to be detected, and the internal spline is detected.
Claims
1. An inner spline measuring auxiliary gauge for a shaft tooth, characterized by, Including positioning frame (1);The positioning frame (1) includes positioning frame bottom plate (101), and a pair of positioning rods (102) are integrally arranged on the positioning frame bottom plate (101), and the pair of positioning rods (102) are arranged in parallel opposite;A pair of positioning rods (102) are provided with the shaft tooth (9) to be detected between them; The positioning frame bottom plate (101) is installed on the base (2), the center of the top end of the base (2) is provided with the centering taper pin (3), the centering taper pin (3) is coaxially arranged with the shaft tooth (9) to be detected, the top of the centering taper pin (3) exceeds the base (2) and extends into the bottom end of the shaft tooth (9) to be detected;The center of the top end of the base (2) is provided with the baffle (4), and the baffle (4) is located inside the base and is arranged below the centering taper pin (3);The center of the baffle (4) is provided with the fixed bolt (5), and the fixed bolt (5) connects the baffle (4) and the centering taper pin (3); The top end of the pair of positioning rods (102) is fixedly provided with the positioning ring (6), the top end of the shaft tooth (9) to be detected passes through the positioning ring (6) and extends out of the top end of the positioning frame (1);The top end of the pair of positioning rods (102) is rotatably provided with the pressing ring (7) outside.
2. The inner spline measuring aid for a shaft tooth according to claim 1, characterized by The outer side of the positioning ring (6) is a circular truncated cone, and the taper of the circular truncated cone is 20°, and the inner side of the positioning rod (102) is matched with the outer side of the positioning ring (6).
3. The inner spline measuring aid for a shaft tooth according to claim 1, wherein The centering taper pin (3) includes the centering taper pin top (301) and the centering taper pin base (302) integrally arranged, the centering taper pin base (302) is arranged in the base (2), and the centering taper pin top (301) extends into the bottom end of the shaft tooth (9) to be detected.
4. The inner spline measuring aid for a shaft tooth according to claim 3, characterized by The outer side of the centering taper pin top (301) is a conical surface, and the taper of the conical surface is 60°.
5. The inner spline measuring aid for a shaft tooth according to claim 3, wherein The center of the centering taper pin base (302) is provided with a threaded hole, and the fixed bolt (5) is installed in the threaded hole.
6. The inner spline measuring aid for a shaft tooth according to claim 1, wherein The outer side of the top of the positioning rod (102) is provided with an external thread, the inner side of the pressing ring (7) is provided with an internal thread, and the external thread of the positioning rod (102) is matched with the internal thread of the pressing ring (7).
7. The inner spline measuring aid for a shaft tooth according to claim 1, wherein The base is provided with an operating hole (8) inside.
8. The inner spline measuring aid for a shaft tooth according to claim 1, wherein The outer side of the pressing ring (7) is provided with knurling.