Assistive tool for symmetrical measurement of earhole locking ring groove

By designing an ear hole locking ring groove symmetry measurement auxiliary tool including mandrel, eccentric shaft, locking ring groove shaft and handle, the problem of inability to detect the symmetry of the locking ring groove in the ear seat in the prior art is solved, effective symmetry detection is achieved, and the accuracy and reliability of the detection are improved.

CN222926140UActive Publication Date: 2025-05-30SHANGHAI NASHEN AUTO PARTS CO LTD
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Patent Information

Application Number
CN202421954670.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-13
Publication Date
2025-05-30
Estimated Expiration
2034-08-13

AI Technical Summary

Technical Problem

In the prior art, when detecting the symmetry of the locking ring groove in the ear seat, the jump detector cannot extend into the ear seat for detection, resulting in the inability to effectively determine whether the locking ring groove is symmetrical.

Method used

An ear hole locking ring groove symmetrical measurement auxiliary tool is designed, including a mandrel, an eccentric shaft, a locking ring groove shaft and a handle. Through the coordination of the eccentric shaft and the locking ring groove shaft, the arc-shaped protrusion is used to clamp and lock the locking ring groove to achieve the fixation of the locking ring groove shaft. Then, the symmetry detection measuring tool is used to measure the end surface of the mandrel to judge the symmetry of the locking ring groove.

Benefits of technology

This auxiliary tool can effectively detect the symmetry of the locking ring groove in the ear seat, solve the problem of detection difficulties in the prior art, and improve the accuracy and reliability of the detection.

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Abstract

An auxiliary tool for symmetrical measurement of an earhole locking ring groove comprises a mandrel, the right end of the mandrel is fixedly connected with an eccentric shaft, the axis of the eccentric shaft deviates from the axis of the mandrel, the eccentric shaft is sleeved with a locking ring groove shaft, the left end face of the locking ring groove shaft is parallel to the left end face of the mandrel, and an arc-shaped protrusion is arranged on the outer circumference of the left end of the locking ring groove shaft. During detection, the mandrel penetrates through two lug holes of a part and the locking ring groove shaft to enter the locking ring groove on the right side, and then the locking ring groove shaft is rotated, so that the arc-shaped bulge can be clamped and locked with the locking ring groove when the arc-shaped bulge is rotated to the eccentric side of the eccentric shaft, and the end surface of the locking ring groove shaft is in contact and fixed with the end surface of the locking ring groove; the end face run-out of the mandrel is measured through the symmetry detection measuring tool and then extends into the left side locking ring groove from the left side, the end face run-out of the mandrel is measured in the same way, and due to the fact that the end faces of the locking ring grooves are parallel to the end face of the mandrel, whether the right side locking ring groove and the left side locking ring groove are symmetrical or not can be judged according to two-time end face run-out data of the mandrel.
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Description

Technical Field

[0001] The utility model relates to the field of machinery, in particular to measuring tools, and especially to an auxiliary tool for symmetric measurement of ear hole snap ring grooves. Background Art

[0002] The protruding element fork is a kind of automobile drive shaft part, which has two ear holes, and each of the two ear holes has a snap ring groove for installing a snap ring to fix the cross shaft end face. The two ear holes need to be symmetrically arranged to ensure dynamic balance. In the prior art, after the ear seat is produced, it is necessary to use a symmetric detection measuring tool to detect whether the two snap ring grooves on both sides are symmetric. However, since the snap ring groove is located inside the ear hole, the runout detector cannot extend into it for detection. Summary of the Invention

[0003] The purpose of the utility model is to provide an auxiliary tool for symmetric measurement of ear hole snap ring grooves, and the auxiliary tool for symmetric measurement of ear hole snap ring grooves is to solve the technical problem that the existing symmetric detection measuring tool cannot extend into the ear seat to detect whether the snap ring grooves are symmetric.

[0004] An auxiliary tool for symmetric measurement of ear hole snap ring grooves of the utility model includes a mandrel. The right end of the mandrel is fixedly connected with an eccentric shaft, the axis of the eccentric shaft deviates from the axis of the mandrel, a snap ring groove shaft is sleeved on the eccentric shaft, the left end face of the snap ring groove shaft is parallel to the left end face of the mandrel, an arc-shaped protrusion is arranged on the outer circumference of the left end of the snap ring groove shaft, the right end of the eccentric shaft is connected with a handle, and a bearing is sleeved on the eccentric shaft between the snap ring groove shaft and the handle.

[0005] Further, the eccentric shaft is connected with the mandrel by screws.

[0006] Further, the bearing is a plain bearing.

[0007] Further, a roller is sleeved on the eccentric shaft between the snap ring groove shaft and the mandrel.

[0008] Compared with the prior art, the effect of the utility model is positive and obvious. During detection, the mandrel is passed through the two ear holes of the ear seat, and the snap ring groove shaft enters the right snap ring groove. Then the snap ring groove shaft is rotated. Since the snap ring groove shaft is sleeved on the eccentric shaft and the axis of the eccentric shaft deviates from the axis of the mandrel, when the arc-shaped protrusion is rotated to the eccentric side of the eccentric shaft, the arc-shaped protrusion can be clamped and locked with the right snap ring groove, so that the end face of the snap ring groove shaft contacts and fixes with the end face of the right snap ring groove. Then, the runout of the end face of the mandrel is measured by using a symmetric detection measuring tool. Then the snap ring groove shaft is rotated, the mandrel is taken out, and the left side is inserted into the left snap ring groove. Similarly, the runout of the end face of the mandrel is measured. Since the end face of the snap ring groove is parallel to the end face of the mandrel, it is possible to judge whether the right snap ring groove and the left snap ring groove are symmetric according to the two runout data of the end face of the mandrel. Brief Description of the Drawings

[0009] Figure 1 Schematic diagram of a symmetric measurement auxiliary tool for ear hole lock ring grooves of the present utility model.

[0010] Figure 2 Schematic diagram of the usage state of a symmetric measurement auxiliary tool for ear hole lock ring grooves of the present utility model.

[0011] Figure 3 Schematic diagram of an ear seat.

[0012] Figure 4 Schematic diagram of an eccentric shaft in a symmetric measurement auxiliary tool for ear hole lock ring grooves of the present utility model.

[0013] Figure 5 Front view sectional view schematic diagram of a lock ring groove shaft in a symmetric measurement auxiliary tool for ear hole lock ring grooves of the present utility model.

[0014] Figure 6 Side view schematic diagram of a lock ring groove shaft in a symmetric measurement auxiliary tool for ear hole lock ring grooves of the present utility model. Specific implementation mode

[0015] The present utility model will be further described below in conjunction with embodiments, but the present utility model is not limited to these embodiments. Any similar structure and its similar changes of the present utility model should be included in the protection scope of the present utility model. The use of directions such as up, down, front, back, left, and right in the present utility model is only for the convenience of clear description and does not limit the technical solution of the present utility model.

[0016] As Figures 1 - 6 shown, a symmetric measurement auxiliary tool for ear hole lock ring grooves of the present utility model includes a core shaft 1. A right end of the core shaft 1 is fixedly connected with an eccentric shaft 3. The axis of the eccentric shaft 3 deviates from the axis of the core shaft 1. A lock ring groove shaft 5 is sleeved on the eccentric shaft 3. A left end face of the lock ring groove shaft 5 is parallel to a left end face of the core shaft 1. An arc-shaped protrusion 8 is arranged on an outer circumference of a left end of the lock ring groove shaft 5. A right end of the eccentric shaft 3 is connected with a handle 7. A bearing 6 is sleeved on the eccentric shaft 3 between the lock ring groove shaft 5 and the handle 7.

[0017] Furthermore, the eccentric shaft 3 is connected with the core shaft 1 by a screw 2.

[0018] Furthermore, the bearing 6 is a plain bearing.

[0019] Furthermore, a roller 4 is sleeved on the eccentric shaft 3 between the lock ring groove shaft 5 and the core shaft 1.

[0020] Specifically, the bearing 6, the plain bearing, the roller 4, etc. in this embodiment all adopt well-known solutions in the prior art, and those skilled in the art are all aware of them, so they will not be elaborated here.

[0021] Working principle of this embodiment:

[0022] During detection, insert the mandrel 1 through the two ear holes of the ear seat. The locking ring groove shaft 5 enters the right locking ring groove 9, and then rotate the locking ring groove shaft 5. Since the locking ring groove shaft 5 is sleeved on the eccentric shaft 3 and the axis of the eccentric shaft 3 deviates from the axis of the mandrel 1, when the arc-shaped protrusion 8 is rotated to the eccentric side of the eccentric shaft 3, the arc-shaped protrusion 8 can be clamped and locked with the right locking ring groove 9, so that the end face of the locking ring groove shaft 5 contacts and fixes with the end face of the right locking ring groove 9. Then use a symmetric measuring tool to measure the end face runout of the mandrel 1. Then rotate the locking ring groove shaft 5, take out the mandrel 1, insert it into the left locking ring groove 9 from the left side, and similarly measure the end face runout of the mandrel 1. Since the end face of the locking ring groove 9 is parallel to the end face of the mandrel 1, it is possible to judge whether the right locking ring groove 9 and the left locking ring groove 9 are symmetric according to the two end face runout data of the mandrel 1.

Claims

1. A symmetry measuring aid for ear hole lock ring groove, characterized in that: It includes a core shaft, the right end of which is fixedly connected to an eccentric shaft, the axis center of the eccentric shaft deviates from the axis center of the core shaft, a locking ring groove shaft is sleeved on the eccentric shaft, the left end face of the locking ring groove shaft is parallel to the left end face of the core shaft, an arc-shaped protrusion is arranged on the outer circumference of the left end of the locking ring groove shaft, the right end of the eccentric shaft is connected to a handle, and a bearing is sleeved on the eccentric shaft between the locking ring groove shaft and the handle.

2. The ear hole lock ring groove symmetry measuring aid according to claim 1, characterized in that: The eccentric shaft is connected to the core shaft through screws.

3. The ear hole lock ring groove symmetry measuring aid according to claim 1, characterized in that: The bearing is a plane bearing.

4. The ear hole lock ring groove symmetry measuring aid according to claim 1, characterized in that: A roller is sleeved on the eccentric shaft between the locking ring groove shaft and the core shaft.