Contact type device for detecting outer diameter of shaft

Abstract

The utility model belongs to the technical field of shaft product detection equipment, and relates to a contact type device for detecting the outer diameter of a shaft, which comprises a bottom plate (222), two clamping mechanisms and a V-shaped block (211) for placing a shaft product, the two clamping mechanisms are mounted on the bottom plate through a clamping seat, and the clamping seat comprises a bearing (006), a bearing seat (219) and a rotating shaft (221); the clamping mechanism comprises a contact type displacement sensor (001), a duplex cylinder (002), a pull-down block (218), clamping blocks (216, 217), a guide shaft (212) and a measuring seat (225); wherein the measuring seat is fixed on the rotating shaft, the V-shaped block is provided with an opening for the guide shaft to stretch out and draw back, and the axial direction of the V-shaped block is perpendicular to the axial direction of the guide shaft. According to the utility model, the accuracy of outer diameter detection of shaft products is improved, and the device can be compatible with various shafts with different diameters and is used for detection of various diameters.

Description

Technical Field

[0001] This utility model belongs to the technical field of shaft product testing equipment, and in particular relates to a contact-type device for testing the outer diameter of shafts. Background Technology

[0002] In the existing technology, various tests need to be performed on shaft products during the production process, including straightness testing, outer diameter testing, and rigidity testing. When testing the outer diameter of shaft products, visual inspection is usually used. However, for some shaft products with a protective oil film on the surface, if the outer diameter is tested visually, the measured data will have errors. This is because the oil on the surface of the shaft will affect the visual inspection, resulting in misjudgment. This will affect the accuracy and efficiency of the test. Utility Model Content

[0003] The purpose of this utility model embodiment is to provide a contact-type device for detecting the outer diameter of a shaft, which can improve the accuracy of outer diameter detection of shaft products.

[0004] The present invention is implemented as follows:

[0005] A contact-type device for detecting the outer diameter of a shaft includes: a base plate, two clamping mechanisms, and a V-block for placing shaft products;

[0006] The V-shaped block is mounted on the base plate, and the two clamping mechanisms are located on both sides of the V-shaped block.

[0007] Two clamping mechanisms are mounted on the base plate via clamping seats. The clamping seats include bearings, bearing housings, and rotating shafts. The bearings are mounted inside the bearing housings, and the rotating shafts pass through the bearings and are fixedly connected. The bearing housings are fixed to the base plate, and the two clamping mechanisms are fixed to the rotating shafts.

[0008] The clamping mechanism includes a contact displacement sensor, a double cylinder, a retraction block, a clamping block, a guide shaft, and a measuring base. The double cylinder is connected to the retraction block, the retraction block is connected to the guide shaft, and the guide shaft passes through the clamping block. The double cylinder, the clamping block, and the contact displacement sensor are all fixed on the measuring base. The contact end of the contact displacement sensor is inserted into one end of the guide shaft.

[0009] The measuring base is fixed on the rotating shaft, and the V-block has an opening for the guide shaft to extend and retract through. The axial direction of the V-block is perpendicular to the axial direction of the guide shaft.

[0010] The aforementioned contact-type device for detecting the outer diameter of a shaft further includes a first cylinder fixing block and a second cylinder fixing block. The double cylinder is fixed on the first cylinder fixing block, the first cylinder fixing block and the second cylinder fixing block are fixedly connected, and the second cylinder fixing block is fixedly connected to the measuring base.

[0011] The clamping block includes a first clamping block and a second clamping block, which are arranged side by side along the axial direction of the guide shaft. The first clamping block is provided with a linear bearing through which the guide shaft passes.

[0012] The aforementioned contact-type device for detecting the outer diameter of a shaft further includes a sensor mounting bracket, a mounting base, a guide block, a guide cylinder, and a spring. The contact displacement sensor is fixed on the mounting base via the sensor mounting bracket. The mounting base is fixedly connected to the guide cylinder. The guide cylinder is fixed inside a second clamping block. The guide block is sleeved on one end of the guide shaft and is disposed inside the guide cylinder, sliding along the axial direction of the guide cylinder. The two ends of the spring abut against the guide block and the guide cylinder, respectively.

[0013] The lower part of the V-shaped block is a portal structure, and the clamping seat is set in the space of the portal structure.

[0014] Four support feet are installed around the bottom of the base plate.

[0015] This invention employs a contact-based, non-photoelectric detection method. A V-shaped block supports the shaft product, and a guide shaft contacts the surface of the shaft product. Data is read using a contact displacement sensor to accurately detect the diameter of the shaft product. This method solves the measurement error and misjudgment problem associated with shaft products with a protective oil film on their surface. It can effectively and stably detect the outer diameter of shaft products with a protective oil film on their surface. The device has good compatibility and can be used to detect shafts of various diameters. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the contact-type shaft outer diameter detection device of this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the contact-type device for detecting the outer diameter of a shaft according to this utility model. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] The specific implementation of this utility model will be described in detail below with reference to specific embodiments:

[0020] like Figure 1 and Figure 2 As shown, a contact-type device for detecting the outer diameter of a shaft includes: a base plate 222, two clamping mechanisms, and a V-block 211 for placing shaft products;

[0021] The V-shaped block is mounted on the base plate, and the two clamping mechanisms are located on both sides of the V-shaped block.

[0022] Two clamping mechanisms are mounted on the base plate via clamping seats. The clamping seats include a bearing 006, a bearing housing 219, and a rotating shaft 221. The bearing is installed inside the bearing housing, and the rotating shaft passes through the bearing and is fixedly connected. The bearing housing is fixed on the base plate, and the two clamping mechanisms are fixed on the rotating shaft.

[0023] The clamping mechanism includes a contact displacement sensor 001, a double cylinder 002, a retraction block 218, a clamping block, a guide shaft 212, and a measuring base 225. The double cylinder is connected to the retraction block, the retraction block is connected to the guide shaft, and the guide shaft passes through the clamping block. The double cylinder, the clamping block, and the contact displacement sensor are all fixed on the measuring base. The contact end of the contact displacement sensor is inserted into one end of the guide shaft.

[0024] In the figure, the measuring base is fixed on the rotating shaft, and the V-block is provided with an opening for the guide shaft to extend and retract. The axis of the V-block is perpendicular to the axis of the guide shaft.

[0025] The aforementioned contact-type device for detecting the outer diameter of a shaft further includes a first cylinder fixing block 223 and a second cylinder fixing block 224. The double cylinder is fixed on the first cylinder fixing block, the first cylinder fixing block is fixedly connected to the second cylinder fixing block, and the second cylinder fixing block is fixedly connected to the measuring base.

[0026] The clamping block includes a first clamping block 216 and a second clamping block 217, which are arranged side by side along the axial direction of the guide shaft. The first clamping block is provided with a linear bearing 003 for the guide shaft to pass through.

[0027] The aforementioned contact-type device for detecting the outer diameter of a shaft further includes a sensor mounting bracket 005, a mounting base 215, a guide block 213, a guide cylinder 214, and a spring 004. The contact displacement sensor is fixed on the mounting base via the sensor mounting bracket. The mounting base is fixedly connected to the guide cylinder. The guide cylinder is fixed inside the second clamping block. The guide block is sleeved on one end of the guide shaft and is disposed inside the guide cylinder, sliding along the axial direction of the guide cylinder. The two ends of the spring abut against the guide block and the guide cylinder, respectively.

[0028] In the figure, the lower part of the V-shaped block is a portal structure, and the clamping seat is set in the space of the portal structure.

[0029] In the diagram, four support feet are set around the bottom of the base plate.

[0030] The method for using this utility model device to inspect shaft products is as follows:

[0031] 1. Place the shaft to be tested on the V-block 211, and then the spring 004 pushes out the guide shaft 212 so that the two shafts are clamped together; then the contact displacement sensor 001 reads the data. After the data is read, the double cylinder 002 drives the retraction block 218 to pull the guide shaft 212 back. The test is completed, and the test of the next product begins. The cycle is repeated.

[0032] 2. The main function of bearing 006, bearing housing 219, and rotating shaft 221 is to enable the detection device to automatically fine-tune the angle according to the placement position of the shaft. When the position of V-block 211 is slightly off, causing the shaft of the product to be tested to wobble, the module composed of bearing 006, bearing housing 219, and rotating shaft 221 enables the detection device to automatically correct itself. This ensures the perpendicularity of the shaft product being tested to the guide shaft 212, making the measurement more accurate.

[0033] In this embodiment of the invention, the V-block 211 is fixed on the base plate, and the clamping mechanism is fixed on the rotating shaft. It can rotate with the bearing to adjust the perpendicularity of the clamping mechanism (mainly the guide shaft) to the axis of the V-block. When the shaft product is placed on the V-block, the guide shaft extends under the action of the spring, passes through the opening on the V-block, and abuts against the shaft product. If the perpendicularity deviation between the clamping mechanism and the V-block is not correct, it can be finely adjusted by the rotating shaft. After fine adjustment, the contact displacement sensor 001 reads the data (the relative displacement between the guide shaft and the contact displacement sensor). By combining the data from the contact displacement sensors of the two clamping mechanisms, the diameter of the shaft product can be measured. After the measurement is completed, the double cylinder 002 is controlled to retract and pull back the retraction block 218, which drives the guide shaft to retract (overcoming the spring force), realizing the axial reset of the guide shaft for the next measurement. In this way, by contacting the guide shaft with the shaft product, and by using the plane at the end of the guide shaft to contact the circumference of the shaft product, precise engagement is achieved, enabling diameter measurement. Even if there is an oil film on the shaft, it can be ignored, ensuring measurement accuracy.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for contact detection of an outer diameter of a shaft, characterized in that include: Base plate, two clamping mechanisms, and V-blocks for placing shaft-type products; The V-shaped block is mounted on the base plate, and the two clamping mechanisms are located on both sides of the V-shaped block. Two clamping mechanisms are mounted on the base plate via clamping seats. The clamping seats include bearings, bearing housings, and rotating shafts. The bearings are mounted inside the bearing housings, and the rotating shafts pass through the bearings and are fixedly connected. The bearing housings are fixed to the base plate, and the two clamping mechanisms are fixed to the rotating shafts. The clamping mechanism includes a contact displacement sensor, a double cylinder, a retraction block, a clamping block, a guide shaft, and a measuring base. The double cylinder is connected to the retraction block, the retraction block is connected to the guide shaft, and the guide shaft passes through the clamping block. The double cylinder, the clamping block, and the contact displacement sensor are all fixed on the measuring base. The contact end of the contact displacement sensor is inserted into one end of the guide shaft. The measuring base is fixed on the rotating shaft, and the V-block has an opening for the guide shaft to extend and retract through. The axial direction of the V-block is perpendicular to the axial direction of the guide shaft.

2. The device for contactless detection of the outer diameter of a shaft according to claim 1, characterized in that: It also includes a first cylinder fixing block and a second cylinder fixing block. The double cylinder is fixed on the first cylinder fixing block, the first cylinder fixing block and the second cylinder fixing block are fixedly connected, and the second cylinder fixing block is fixedly connected to the measuring seat.

3. The device for contactless detection of the outer diameter of a shaft according to claim 1, characterized in that: The clamping block includes a first clamping block and a second clamping block, which are arranged side by side along the axial direction of the guide shaft. The first clamping block is provided with a linear bearing through which the guide shaft passes.

4. The device for contact-type detection of shaft outer diameter according to claim 3, characterized in that: It also includes a sensor mounting bracket, a mounting base, a guide block, a guide cylinder, and a spring. The contact displacement sensor is fixed on the mounting base by the sensor mounting bracket. The mounting base is fixedly connected to the guide cylinder. The guide cylinder is fixed inside the second clamping block. The guide block is sleeved on one end of the guide shaft. The guide block is set inside the guide cylinder and slides along the axial direction of the guide cylinder. The two ends of the spring abut against the guide block and the guide cylinder, respectively.

5. The device for contactless detection of the outer diameter of a shaft according to claim 1, characterized in that: The lower part of the V-shaped block is a portal structure, and the clamping seat is set in the space of the portal structure.

6. The device for contactless detection of the outer diameter of a shaft according to claim 1, characterized in that: Four support feet are installed around the base plate.

Images