WO2022068180A1

WO2022068180A1 - Fixing clamp for shaft part measurement

Info

Publication number: WO2022068180A1
Application number: PCT/CN2021/088147
Authority: WO
Inventors: 徐爱文; 张和君; 王世良
Original assignee: 深圳市中图仪器股份有限公司
Priority date: 2020-09-29
Filing date: 2021-04-19
Publication date: 2022-04-07
Also published as: CN213532289U

Abstract

A fixing clamp for shaft part measurement, comprising a clamp bottom plate (23). A fixed center mechanism (20) and an elastic center mechanism which are used for clamping a shaft part are respectively provided on two sides of the clamp bottom plate; the elastic center mechanism comprises a clamp sliding plate (21); a mounting sleeve (18) is provided on the clamp sliding plate; a linear bearing (4) is mounted in a hole of the mounting sleeve; a sliding rod (19) is slidably mounted in a hole of the linear bearing; one end of the sliding rod is connected to a movable center (16), and the other end of the sliding rod is connected to a compression spring (1); the compression spring is mounted in the mounting sleeve; the compression spring is clamped by the sliding rod and the mounting sleeve.

Description

A measuring fixture for shaft parts

technical field

The utility model relates to a fixture, in particular to a fixing fixture for measuring shaft parts.

Background technique

In the field of image measurement, flash tester and imager are general-purpose measuring instruments, which can realize two-dimensional size detection for various parts in function. However, due to the different shapes of the parts, different parts cannot be placed directly and smoothly on the instrument. For the parts that can be placed directly and smoothly, they can be directly measured. For parts that are inclined and unstable after placement, if they are measured directly, measurement errors will be introduced, and even the measurement size will be inaccurate, especially for some frequently detected shaft parts and special-shaped shaft parts, when placed on the instrument to measure It may roll and tilt, which is extremely inconvenient for measurement, and reduces quality and efficiency when testing in large quantities.

Therefore, how to provide a fixture that can fast and stably fix the shaft parts is a technical problem to be solved urgently by those skilled in the art.

technical problem

In order to solve the problems in the prior art, the utility model provides a measuring fixture for shaft parts.

technical solutions

The utility model provides a fixing fixture for measuring shaft parts, comprising a fixture bottom plate, a fixed top mechanism and an elastic top mechanism for clamping the shaft parts are respectively installed on both sides of the fixture bottom plate, and the fixed top mechanism comprises a fixed top , the elastic top mechanism includes a clamp slide plate, a mounting sleeve is provided on the clamp slide plate, a linear bearing is installed in the hole of the mounting sleeve, a sliding rod is slidably installed in the hole of the linear bearing, and the slide One end of the rod is connected with a movable center, and the other end of the sliding rod is connected with a compression spring, the compression spring is installed in the hole of the installation sleeve, and the compression spring is connected by the sliding rod and the installation sleeve. To be clamped, the fixed top and the movable top are coaxially arranged.

As a further improvement of the present invention, the fixed top and the movable top are both conical.

As a further improvement of the present invention, the sliding rod and the movable top are connected by threads.

As a further improvement of the present invention, the clamp slide plate is connected with the clamp bottom plate through a linear guide rail.

As a further improvement of the present invention, a step block is arranged on the bottom plate of the fixture, and the step block is a cogging structure, and the pitch between the teeth is a step, and the clamp slide plate is provided with a reset When positioning, the end of the reset-type knob plunger is inserted into the tooth slot structure of the step block for positioning; when not positioned, lift the reset-type knob plunger to make the reset-type knob plunger The end of the knob plunger leaves the cogging structure of the step block.

As a further improvement of the present invention, a top block is provided on the bottom plate of the fixture, a plunger is provided on the upper part of the top block, a mounting through hole is provided on the top block, and the fixed top is installed in the mounting hole. Inside the hole, the plunger radially clamps the fixed tip inside the mounting through hole.

beneficial effect

The beneficial effect of the utility model is: through the above scheme, the shaft parts can be clamped by the fixed top and the movable top, which is beneficial to realize the correct placement of various shaft parts, and finally make the shaft parts in the imager and the flash tester. more convenient and efficient measurements.

Description of drawings

FIG. 1 is a schematic diagram of a measuring fixture for shaft parts according to the present invention.

Figure 2 is a front view of a measuring fixture for shaft parts of the present invention.

FIG. 3 is a sectional view A-A of FIG. 2 .

FIG. 4 is a sectional view B-B of FIG. 2 .

FIG. 5 is a sectional view C-C of FIG. 2 .

Embodiments of the present invention

The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1 to 5, a measuring fixture for shaft parts is mainly composed of a compression spring 1, a reset knob plunger 2, a linear slide rail 3, a linear bearing 4, a plunger 5, an anti-skid foot pad 7, a step It consists of a distance block 8, a decorative plate 9, a decorative hole cover 10, a movable top 16, a positioning pin 17, a mounting sleeve 18, a sliding rod 19, a fixed top 20, a fixture slide plate 21, a top block 22, and a fixture bottom plate 23.

The bottom plate 23 of the fixture is used as the base plate of the entire fixture, and all parts use it as a platform for installation and movement. Below the bottom plate of the fixture 23, four anti-skid foot pads 7 and four heightened columns can be installed, and the four heightened columns are optional in the fixture. Equipped with structural parts, depending on the measurement requirements, a heightened column can be installed to increase the height of the fixture so that it can measure workpieces with larger diameters. Footpads 7.

The left side of the fixture base plate 23 is fixed with screws on the top block 22, the upper part of the top block 22 is equipped with a plunger 5, and there is a through hole on the top block 22 for installing the fixed top 20. The fixed top 20 can be a 75-degree top, a 90-degree top The top and the 60-degree top, these three tops are interchangeable when installed. According to the structure of the workpiece to be tested, different tops are selected to be installed in the fixture top block, and radial preloading is performed by the plunger 5 to ensure that after the top is installed Will not loosen easily.

There are two elongated grooves on the surface of the fixture bottom plate 23. Two positioning pins 17 can be installed on the two ends of the grooves, respectively, which are used to install and fix two linear guide rails 3. The linear guide rails 3 are fixed on the clamp slide plate 21 by screws. .

The linear bearing 4 is installed in the hole of the installation sleeve 18, and the sliding rod 19 is installed in the hole of the linear bearing 4. One end of the sliding rod 19 has a threaded hole, which can be connected to different movable tops 16. 75-degree top at the tail and 60-degree top at the tail.

When the sliding rod 19 is installed in the linear bearing 4, the rear of the sliding rod 19 is compressed by the compression spring 1, and the decorative plate 9 is fixed behind the installation sleeve 18 to ensure that the compression spring 1 will not come loose from the installation sleeve 18. .

The mounting sleeve 18 is fixed on the clamp slide plate 21 . The clamp slide plate 21 is provided with two decorative hole covers 10 to block the exposed screws, and the reset type knob plunger 2 is fixed on the clamp slide plate 21 . When measuring the workpiece, it is necessary to select the appropriate center hole according to the center hole structure of the workpiece. For example, the 90-degree center can only be matched with the tail 90-degree center, the 75-degree center can only be matched with the tail 75-degree center, and the 60-degree center can only be matched with the tail. The 60-degree top is used in combination and generally cannot be mixed and matched.

A step block 8 is installed in a groove of the fixture bottom plate 23, and the step block 8 is a toothed structure, that is, the step block 8 is in the shape of a rack, and the pitch between the teeth is a step, and the reset type knob plunger 2 One end can be positioned in the tooth slot of the step block 8.

There is a square hole in the middle of the fixture bottom plate 23 , and the square hole is a light-transmitting hole. When using the fixture to install the workpiece to be tested, insert one end of the workpiece to be tested into the center hole on the left with the left hand, then lay the workpiece flat, and lift the reset knob plunger 2 with the right hand, so that the entire structure mounted on the fixture slide plate 21 is The linear guide 3 moves to the left, so that the center on the right side is inserted into the right end of the workpiece to be tested. According to the size and weight of the workpiece, it can be properly pushed to the right, and then the reset-type knob plunger 2 is loosened so that the plunger can be inserted into the workpiece. Into the tooth slot of the step block 8, the right center can stand against the workpiece under the action of the compression spring 1, and the clamping of the workpiece to be tested is completed. When the workpiece is measured, the workpiece to be measured can be taken out from the fixture simply by lifting the reset-type knob plunger 2 by hand.

The utility model provides a measuring and fixing fixture for shaft parts, which adopts mature and simple linear slide rails 3 and linear bearings 4 as the key components in the centering of the left and right tops, and through interchangeable different tops, it can realize High-precision clamping measurement of different types of workpieces to be measured; during clamping, three key structural parts, including reset-type knob plunger 2, step block 8 with a cogging structure, and compression spring 1, are used to clamp the workpiece. The workpiece is measured, which provides a guarantee for the convenient clamping, so as to realize the function achieved by this fixture.

The utility model provides a measuring fixture for shaft parts, which has the following advantages: 1) Fast clamping, high precision, and much lower cost than that of one instrument.

2) Simple modular design, low manufacturing cost and easy to use.

3) Especially for shaft parts that are unstable horizontally, this clamp has strong adaptability. When the flash tester and imager measure parts, it can improve the measurement efficiency, ensure the accuracy and stability of the measurement, and reduce the measurement cost. At the same time, the measuring range of the instrument is wider.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be considered that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deductions or substitutions can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims

A fixing fixture for measuring shaft parts, which is characterized in that it comprises a fixture bottom plate, a fixed top mechanism and an elastic top mechanism for clamping the axis parts are respectively installed on both sides of the fixture bottom plate, and the fixed top mechanism comprises a fixed top, The elastic top mechanism includes a clamp slide plate, a mounting sleeve is provided on the clamp slide plate, a linear bearing is installed in the hole of the mounting sleeve, a sliding rod is slidably installed in the hole of the linear bearing, and the sliding rod is installed. One end of the sliding rod is connected with a movable center, and the other end of the sliding rod is connected with a compression spring, the compression spring is installed in the hole of the installation sleeve, and the compression spring is held by the sliding rod and the installation sleeve. Clamping, the fixed top and the movable top are coaxially arranged.
The measuring fixture for shaft parts according to claim 1, wherein the fixed top and the movable top are both conical.
The measuring fixture for shaft parts according to claim 1, characterized in that: the sliding rod and the movable top are threadedly connected.
The fixing fixture for measuring shaft parts according to claim 1, wherein the fixture sliding plate is connected to the fixture bottom plate through a linear guide rail.
The measuring fixture for shaft parts according to claim 1, characterized in that: a step block is arranged on the bottom plate of the fixture, the step block is a cogging structure, and the pitch between the teeth is a step There is a reset type knob plunger on the clamp slide plate. When positioning, the end of the reset type knob plunger is inserted into the tooth slot structure of the step block for positioning. When not positioned, the reset type is lifted. type knob plunger, so that the end of the reset type knob plunger leaves the cogging structure of the step block.
The fixing fixture for measuring shaft parts according to claim 1, characterized in that: the bottom plate of the fixture is provided with a top block, the upper part of the top block is provided with a plunger, and the top block is provided with an installation through hole, The fixed tip is installed in the installation through hole, and the plunger clamps the fixed tip in the installation through hole in the radial direction.