CN215864945U - Micrometer screw pair clearance adjusting mechanism - Google Patents
Micrometer screw pair clearance adjusting mechanism Download PDFInfo
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- CN215864945U CN215864945U CN202122404518.XU CN202122404518U CN215864945U CN 215864945 U CN215864945 U CN 215864945U CN 202122404518 U CN202122404518 U CN 202122404518U CN 215864945 U CN215864945 U CN 215864945U
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- conical surface
- shaft sleeve
- straight thread
- threaded shaft
- screw pair
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Abstract
The utility model provides a micrometer screw pair clearance adjusting mechanism which comprises an adjusting nut and a threaded shaft sleeve which are connected in a matching manner, wherein the outer diameter of the tail end of the threaded shaft sleeve is sequentially processed with a conical surface I and a straight thread I, the conical surface I is positioned on the front side of the straight thread I, and the straight thread I is positioned at the tail end of the threaded shaft sleeve; and an inner hole of the adjusting nut is provided with a conical surface II and a straight thread II which are matched and connected with the tail part of the threaded shaft sleeve. The utility model provides a micrometer screw pair clearance adjusting mechanism which can reduce the processing difficulty of a workpiece and has the advantages of simple structure and convenience in adjustment.
Description
Technical Field
The utility model relates to the technical field of micrometers, in particular to a micrometer screw pair clearance adjusting mechanism.
Background
Micrometer, also known as micrometer screw, is a commonly used measuring tool in geometric measurement. The micrometer usually consists of a micrometer frame, a measuring anvil, a micrometer screw, a threaded shaft sleeve, a fixed sleeve, a micro-cylinder, a force measuring device and a locking device. The measuring anvil and the threaded shaft sleeve are respectively fixed on two opposite sides of the ruler frame, the fixed sleeve is installed on the threaded shaft sleeve, and the micro sleeve is sleeved outside the fixed sleeve and is coaxial with the fixed sleeve. The micrometer screw is connected with the threaded shaft sleeve in a threaded manner, and the tail part of the micrometer screw is connected with a force measuring device. The adjusting nut is arranged at the tail part of the threaded shaft sleeve and used for adjusting a screw pair gap formed by the threaded shaft sleeve and the micrometer screw rod, so that the micrometer screw rod is prevented from moving, and the measurement precision is ensured.
The existing common taper thread matching mechanism of the micrometer is used for adjusting a screw pair, namely, a taper thread 3 is arranged at the tail part of a threaded shaft sleeve, and a gap is adjusted by matching a taper nut with the taper thread, as shown in the attached drawing 1. In the scheme, the taper thread workpiece is difficult to machine, and the production cost is greatly increased. The radial pressure is applied to the threaded shaft sleeve through the threaded conical surface, so that self-locking influence adjustment is easily formed.
Based on the defects of the existing method, a micrometer screw pair clearance adjusting mechanism which can simplify part processing and is convenient to adjust is urgently needed in the field.
SUMMERY OF THE UTILITY MODEL
The utility model provides a micrometer screw pair clearance adjusting mechanism which can reduce the processing difficulty of a workpiece and has the advantages of simple structure and convenience in adjustment.
In order to achieve the technical purpose and achieve the technical effects, the utility model solves the problems through the following technical scheme:
a micrometer screw pair clearance adjusting mechanism comprises an adjusting nut and a threaded shaft sleeve which are connected in a matching mode, wherein the outer diameter of the tail end of the threaded shaft sleeve is sequentially processed with a conical surface I and a straight thread I, the conical surface I is located on the front side of the straight thread I, and the straight thread I is located at the tail end of the threaded shaft sleeve; and an inner hole of the adjusting nut is provided with a conical surface II and a straight thread II which are matched and connected with the tail part of the threaded shaft sleeve.
Furthermore, a tool withdrawal groove is prefabricated at the connecting part of the conical surface I and the straight thread I, and the front end of the straight thread II is away from the conical surface I by a certain distance during assembly.
Furthermore, the conical surface I and the conical surface II are arranged in parallel, and the diameter of the small end opening of the conical surface II is designed according to the minimum outer diameter of-0.1 mm of the conical surface I.
The utility model has the advantages and effects that:
the micrometer screw pair clearance adjusting mechanism adopts a conical surface and straight thread combined structure to adjust the screw pair clearance. In the process of screwing in the straight thread, the conical surface II of the adjusting nut compresses the conical surface I of the thread shaft sleeve to provide radial pressure, so that the matching of the screw pair generates radial contraction, and the purpose of adjusting the clearance of the screw pair can be achieved.
By adopting the screw pair clearance adjusting mechanism, the pressure of the conical surface is converted through the screw in of the straight threads, the conical surface threads do not need to be processed, the straight threads can be directly tapped by a screw tap, and the manufacturing process is simple. The radial acting force is applied by surface-to-surface contact, so that the stress surface can be increased, and the loss of parts is reduced. Compared with the taper thread, the straight thread connection is not easy to self-lock, and the adjustment is more convenient and smooth.
Drawings
FIG. 1 is a schematic structural diagram of a prior art tapered thread engagement mechanism;
FIG. 2 is a schematic structural view of a micrometer screw pair clearance adjustment mechanism according to the present invention.
And (3) identifying the figure number:
1. adjusting nut, 11, conical surface I, 12, straight thread I, 2, threaded shaft sleeve, 21, conical surface II, 22, straight thread II, 3 and taper thread.
Detailed Description
The technical solution in the embodiments of the present invention is clearly and completely described below with reference to the drawings in the embodiments of the present invention. The specific embodiments described herein are merely illustrative of the utility model and are not intended to be limiting.
The micrometer screw pair clearance adjusting mechanism described in this embodiment is used for adjusting a screw pair clearance formed by the threaded shaft sleeve 2 and the micrometer screw in the micrometer. As shown in fig. 2, the adjusting mechanism body comprises an adjusting nut 1 and a threaded shaft sleeve 2, and a tapered surface I11 and a straight thread I12 are sequentially processed at the tail end of the threaded shaft sleeve 2. The taper I11 is located in front of the straight thread I12, the straight thread I12 is located at the rear end of the threaded sleeve 2, and the relief 13 is preformed between the taper I11 and the straight thread I12.
The inner hole of the adjusting nut 1 is provided with a conical surface II21 and a straight thread II22 which are matched and connected with the tail part of the threaded shaft sleeve 2, and the adjusting nut 1 is connected with the threaded shaft sleeve 2 through the straight thread II22 in a threaded mode. The axial pressing force generated during the forward screwing process of the adjusting nut 1 is represented by the radial pressure of the conical surface II21 on the conical surface I11. The radial pressure makes the thread shaft sleeve 2 generate radial contraction, and the purpose of adjusting the clearance of the bolt pair can be achieved.
In the embodiment, the conical surface I11 and the conical surface II21 are arranged in parallel, so that the contact surface is improved, and the part is prevented from being damaged by sharp contact. The diameter of the small port of the conical surface II21 is designed according to the minimum outer diameter size of-0.1 mm of the conical surface I11, so that the radial pressure is ensured.
The embodiments of the present invention are described in detail above with reference to the drawings, but the present invention is not limited to the described embodiments. Many changes, modifications, substitutions and alterations to these embodiments are within the scope of the present invention without departing from the principles and spirit of the utility model.
Claims (3)
1. The utility model provides a micrometer screw pair clearance adjustment mechanism, includes adjusting nut (1) and threaded shaft sleeve (2) that the cooperation is connected, its characterized in that: the outer diameter of the tail end of the threaded shaft sleeve (2) is sequentially processed with a conical surface I (11) and a straight thread I (12), the conical surface I (11) is positioned on the front side of the straight thread I (12), and the straight thread I (12) is positioned at the tail end of the threaded shaft sleeve (2); and an inner hole of the adjusting nut (1) is provided with a conical surface II (21) and a straight thread II (22) which are matched and connected with the tail part of the threaded shaft sleeve (2).
2. The micrometer screw pair clearance adjustment mechanism according to claim 1, characterized in that: the pre-manufactured tool withdrawal groove (13) is arranged at the connecting part of the conical surface I (11) and the straight thread I (12), and the front end of the straight thread II (22) is away from the conical surface I (11) by a certain distance during assembly.
3. The micrometer screw pair clearance adjustment mechanism according to claim 1, characterized in that: the conical surface I (11) and the conical surface II (21) are arranged in parallel, and the diameter of the small end opening of the conical surface II (21) is designed according to the minimum outer diameter of-0.1 mm of the conical surface I (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122404518.XU CN215864945U (en) | 2021-09-30 | 2021-09-30 | Micrometer screw pair clearance adjusting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122404518.XU CN215864945U (en) | 2021-09-30 | 2021-09-30 | Micrometer screw pair clearance adjusting mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215864945U true CN215864945U (en) | 2022-02-18 |
Family
ID=80260015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122404518.XU Active CN215864945U (en) | 2021-09-30 | 2021-09-30 | Micrometer screw pair clearance adjusting mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215864945U (en) |
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2021
- 2021-09-30 CN CN202122404518.XU patent/CN215864945U/en active Active
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