CN218896033U

CN218896033U - Fastener thread friction coefficient test sleeve frock

Info

Publication number: CN218896033U
Application number: CN202222668816.4U
Authority: CN
Inventors: 丁卯; 喻草宏; 王淳安; 张祝富; 杨勇
Original assignee: Shanghai Dacromet Surface Treatment Co ltd
Current assignee: Shanghai Dacromet Surface Treatment Co ltd
Priority date: 2022-10-11
Filing date: 2022-10-11
Publication date: 2023-04-21
Anticipated expiration: 2032-10-11

Abstract

The utility model discloses a fixture for testing friction coefficient of a thread of a fastener, which relates to the technical field of fastener detection equipment and comprises a stepped seat, wherein the stepped seat is of a multi-layer cylindrical structure, a threaded hole is formed in the top of the stepped seat, a positioning concave hole is formed in the bottom of the stepped seat, the positioning concave hole is communicated with the threaded hole, and the diameter of the positioning concave hole is larger than that of the threaded hole. The utility model provides a sleeve tool for testing the thread friction coefficient of a fastener, which is convenient for assembling the fastener, can detect objects and has more real acquired data.

Description

Fastener thread friction coefficient test sleeve frock

Technical Field

The utility model relates to the technical field of fastener detection equipment, in particular to a sleeve tool for testing friction coefficient of threads of fasteners.

Background

The coefficient of friction is the ratio of the friction between the surfaces and the normal force acting on one of the surfaces, and is determined by the nature of the sliding surface, the roughness and the (possibly present) lubricant. The rougher the sliding surface, the greater the coefficient of friction. The friction coefficient between objects is divided into two types, one is sliding friction coefficient and the other is maximum static friction coefficient, and the latter is slightly larger in value than the former. If the relative velocity between the two objects is large, the coefficient of sliding friction is also related to the relative velocity. The coefficient of friction is usually measured by the friction angle method.

In the prior art, when the fastener with the internal thread specification being more than or equal to M6 and the length being between 20 and 35mm is detected, the part is always monitored by being placed in a standard part detection tool, and the accuracy of detection cannot be ensured due to the fact that the part is short. Because the actual parts are different from the standard parts in structure and size, the situation that data are distorted can occur, the accuracy of a measurement result is affected, and poor assembly sites are caused.

Therefore, the utility model provides a fixture for testing the friction coefficient of the thread of a fastener.

Disclosure of Invention

The utility model aims to solve the defects in the prior art, and provides a sleeve tool for testing the friction coefficient of a thread of a fastener.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a fastener screw thread coefficient of friction test sleeve frock, includes the ladder seat, the ladder seat is multilayer cylinder structure, the screw hole has been seted up at ladder seat top, the location shrinkage pool has been seted up to ladder seat bottom, the location shrinkage pool with the screw hole is linked together, the diameter of location shrinkage pool is greater than the diameter of screw hole.

Further, a chamfer is arranged at the top edge of the threaded hole.

Further, the step seat is provided with a third-order cylinder, and the radius of the cylinder is sequentially increased from top to bottom.

Furthermore, the concave holes are provided with two stages, the two stages are respectively arranged on the second-order cylinder and the third-order cylinder, the diameter of the concave hole on the second-order cylinder is smaller than that of the concave hole on the third-order cylinder, and the diameter of the concave hole on the second-order cylinder is larger than that of the threaded hole.

Furthermore, the clamping grooves are symmetrically formed in the bottom cylinder of the stepped seat.

Further, the specification of the internal thread is M6-M16; the tooth distance is 0.8mm-2.0mm.

Further, the height of the step seat is larger than 35mm.

Advantageous effects

Compared with the prior art, the utility model has the beneficial effects that: the utility model provides a sleeve tool for testing the thread friction coefficient of a fastener, which is convenient for assembling the fastener, can detect objects and has more real acquired data.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model.

FIG. 1 is a schematic diagram of the overall structure of a fastener thread friction coefficient test sleeve tooling;

fig. 2 is a schematic diagram of the bottom structure of the fixture for testing the friction coefficient of the screw thread of the fastener.

In the figure: 1. a threaded hole; 2. a first-order cylinder; 3. a clamping groove; 4. a second-order cylinder; 5. a third-order cylinder; 6. a second concave hole; 7. and a third concave hole.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Referring to fig. 1-2, a fastener thread friction coefficient test sleeve frock, including the ladder seat, the ladder seat is multilayer cylinder structure, and screw hole 1 has been seted up at the ladder seat top, and the location shrinkage pool has been seted up to the ladder seat bottom, and the location shrinkage pool is linked together with screw hole 1, and the diameter of location shrinkage pool is greater than the diameter of screw hole 1.

The top edge of the threaded hole 1 is provided with a chamfer; the stepped seat is provided with a third-order cylinder, namely a first-order cylinder 2, a second-order cylinder 4 and a third-order cylinder 5 from top to bottom, and the radius of the cylinder from top to bottom is sequentially increased;

in other preferred embodiments, the recess is provided with two stages, respectively on the second-stage cylinder and the third-stage cylinder, the diameter of the recess (second recess 6) on the second-stage cylinder being smaller than the diameter of the recess (third recess 7) on the third-stage cylinder, and larger than the diameter of the threaded hole 1.

In other preferred embodiments, the bottom cylinder of the step seat is provided with a clamping groove, and the clamping groove 3 is symmetrically arranged on the bottom cylinder.

In other preferred embodiments, the internal thread is of the size M6-M16; the tooth distance is 0.8mm-2.0mm.

In other preferred embodiments, the height of the stepped seat is greater than 35mm. The friction coefficient of the fastener with the length of 20-30mm can be detected in a physical mode.

The center part of the tool is of an internal thread structure; the internal threads can be of different specifications and can be set to be M6-M16; the tooth pitch can be 0.8-2.0; the hardness of the tool material is 55-60HRC, the tool material is in a step shape of an integral structure, three layers of steps are arranged in total, and the design size is matched with the detection equipment so as to meet the test requirement; the tool is convenient to prop against the tool by external force during testing through the arrangement of the concave holes, so that the tool is prevented from loosening and overflowing; the clamping grooves 3 are formed in the two sides of the center of the tool and used for clamping the tool, so that the tool is prevented from rotating along with the test.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. The utility model provides a fastener screw thread coefficient of friction test sleeve frock, its characterized in that, includes the ladder seat, the ladder seat is multilayer cylinder structure, the screw hole has been seted up at ladder seat top, the location shrinkage pool has been seted up to ladder seat bottom, the location shrinkage pool with the screw hole is linked together, the diameter of location shrinkage pool is greater than the diameter of screw hole.

2. The fastener thread friction coefficient testing sleeve tooling of claim 1, wherein the threaded hole top edge is provided with a chamfer.

3. The fixture for testing the friction coefficient of the threads of the fastener according to claim 1, wherein the stepped seat is provided with a third-order cylinder, and the radius of the cylinder increases from top to bottom.

4. The fixture for testing the friction coefficient of the threads of the fastener according to claim 3, wherein the concave holes are provided with two stages, the two stages are respectively arranged on the second-stage cylinder and the third-stage cylinder, and the diameter of the concave hole on the second-stage cylinder is smaller than that of the concave hole on the third-stage cylinder and larger than that of the threaded hole.

5. The fixture for testing the friction coefficient of the threads of the fastener according to claim 1, wherein the clamping grooves are formed in the cylinder at the bottom of the stepped seat, and the clamping grooves are symmetrically formed in the cylinder at the bottom.

6. The fixture for testing the friction coefficient of the threads of the fastener according to claim 1, wherein the specification of the internal threads in the threaded hole is M6-M16; the tooth distance is 0.8mm-2.0mm.

7. The fastener thread friction coefficient testing sleeve tooling of claim 1, wherein the height of the stepped seat is greater than 35mm.