Multi-size synchronous measurement equipment for transmission shaft

Abstract

The utility model discloses a multi-size synchronous measuring device for a transmission shaft, which comprises a positioning unit used for positioning the transmission shaft, an air gauge connected with the positioning unit and used for measuring the outer diameter of the transmission shaft, and a length gauge installed on the positioning unit and used for measuring the length of the transmission shaft. The positioning unit is provided with a positioning groove used for containing the transmission shaft, an airflow pipeline of the air gauge is communicated with vent holes formed in the groove walls of the two opposite sides of the positioning groove in a penetrating mode, and the connecting line of the vent holes oppositely formed in the groove walls of the two sides of the positioning groove penetrates through the axis of the transmission shaft. The ventilation hole is used for the air gauge to inject airflow into the ventilation hole so as to measure the outer diameter size of the transmission shaft in the positioning groove, one end of the transmission shaft abuts against the positioning unit, a measuring needle is movably arranged on the length gauge, and the telescopic end of the measuring needle is used for abutting against the other end of the transmission shaft to measure the length size of the transmission shaft.

Description

Technical Field

[0001] This utility model relates to the field of machining measurement, and in particular to a multi-dimensional synchronous measurement device for transmission shafts. Background Technology

[0002] Precision mechanical parts (such as drive shafts) need to undergo full inspection of their appearance and dimensions after machining. In the current production process, the length of the drive shaft is usually measured first using a height gauge, and then the outer diameter of the qualified drive shaft is measured multiple times using calipers to finally determine whether the drive shaft is qualified.

[0003] Furthermore, existing measurements separate the length and outer diameter of the drive shaft, which is not only slow but also requires manual judgment, making it prone to misjudgment and requiring multiple measurements, further increasing the measurement time.

[0004] Therefore, there is an urgent need to develop a multi-size synchronous measurement device. Utility Model Content

[0005] The purpose of this invention is to provide a multi-dimensional synchronous measurement device for drive shafts, which can realize the simultaneous measurement of multiple dimensions, thereby greatly improving measurement efficiency.

[0006] This utility model provides a multi-dimensional synchronous measuring device for a drive shaft, including a positioning unit for positioning the drive shaft, an air gauge connected to the positioning unit for measuring the outer diameter of the drive shaft, and a length gauge mounted on the positioning unit for measuring the length of the drive shaft. The positioning unit has a positioning groove for accommodating the drive shaft. The airflow pipe of the air gauge is connected to vent holes that are opened through the groove walls on opposite sides of the positioning groove. The line connecting the vent holes located on opposite sides of the groove walls passes through the axis of the drive shaft. The vent holes are used by the air gauge to inject airflow to measure the outer diameter of the drive shaft in the positioning groove. One end of the drive shaft abuts against the positioning unit. A measuring needle is movably mounted on the length gauge. The telescopic end of the measuring needle abuts against the other end of the drive shaft to measure the length of the drive shaft.

[0007] Furthermore, the distance between the groove walls on opposite sides of the positioning groove is greater than the outer diameter of the drive shaft.

[0008] Furthermore, the bottom wall and / or side wall of the positioning groove are provided with positioning parts for positioning the drive shaft.

[0009] Furthermore, the positioning unit has a positioning block installed at one end of the transmission shaft, the positioning block and the positioning unit together form the positioning groove, and one end of the transmission shaft abuts against the positioning block.

[0010] Furthermore, the drive shaft has a first outer diameter, a second outer diameter, and a third outer diameter, and the air gauge includes a first air gauge, a second air gauge, and a third air gauge. The first air gauge is used to measure the size of the first outer diameter of the drive shaft, the second air gauge is used to measure the size of the second outer diameter of the drive shaft, and the third air gauge is used to measure the size of the third outer diameter of the drive shaft.

[0011] Furthermore, the groove walls on both sides of the positioning groove include a first sidewall, a second sidewall, and a third sidewall. The first sidewall is located on opposite sides of the first outer diameter, the second sidewall is located on both sides of the second outer diameter, and the third sidewall is located on both sides of the third outer diameter.

[0012] Furthermore, the vent includes a first vent on the first sidewall, a second vent on the second sidewall, and a third vent on the third sidewall, wherein the first vent, the second vent, and the third vent are located on the same horizontal line.

[0013] Furthermore, there are multiple third vent holes, which are arranged at equal intervals along the extension direction of the axis of the drive shaft.

[0014] Furthermore, the length gauge includes a control unit and a measuring unit that are electrically connected to each other. The measuring unit is fixed on the positioning unit, and the measuring needle is movably disposed on the measuring unit.

[0015] Furthermore, the multi-size synchronous measurement device for the drive shaft also includes a fixing block, which is located at the other end of the positioning unit near the drive shaft and spaced apart from the positioning unit. The measuring unit is mounted on the fixing block, and the telescopic end of the measuring needle is oriented toward the other end of the drive shaft.

[0016] The multi-dimensional synchronous measurement device for the drive shaft provided by this utility model measures the outer diameter of multiple dimensions of the drive shaft using multiple air gauges, and simultaneously measures the length of the drive shaft using length gauges, thereby achieving simultaneous measurement of multiple dimensions of the drive shaft and greatly improving measurement efficiency. Attached Figure Description

[0017] Figure 1 This is a perspective view of a multi-dimensional synchronous measuring device for a transmission shaft according to the present invention.

[0018] Figure 2 for Figure 1 The diagram shows a multi-dimensional synchronous measurement device for the drive shaft.

[0019] Figure 3 for Figure 1 The diagram shows a perspective view of the drive shaft mounted on a positioning unit of a multi-dimensional synchronous measuring device.

[0020] Figure 4 for Figure 3 The diagram shows a three-dimensional view of the positioning unit of a multi-dimensional synchronous measuring device for the drive shaft.

[0021] Figure 5 for Figure 4 A three-dimensional view of the positioning unit.

[0022] Figure 6 for Figure 5 The diagram shows a cross-sectional view of the positioning unit.

[0023] Figure 7 This is a perspective view of the control unit of the length gauge of this utility model.

[0024] Figure 8 This is a perspective view of the measuring unit of the length gauge of this utility model.

[0025] Figure 9 This is a schematic diagram of the transmission shaft measured by this utility model. Detailed Implementation

[0026] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0027] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and claims of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0028] The directional terms such as "up," "down," "left," "right," "front," "back," "top," and "bottom" (if present) used in the specification and claims of this utility model are defined according to the position of the structures in the drawings and the relative positions of the structures, and are only for the purpose of clarity and convenience in expressing the technical solution. It should be understood that the use of directional terms should not limit the scope of protection claimed in this application.

[0029] Please see Figures 1-9This utility model discloses a multi-dimensional synchronous measuring device for a drive shaft, used to simultaneously measure multiple dimensions of a drive shaft 100, including but not limited to outer diameter and length dimensions. It includes a positioning unit 10 for positioning the drive shaft 100, an air gauge 20 connected to the positioning unit 10 for measuring the outer diameter of the drive shaft 100, and a length gauge 30 mounted on the positioning unit 10 for measuring the length of the drive shaft 100. The positioning unit 10 has a positioning groove 101 for accommodating the drive shaft 100. The airflow pipe of the air gauge 20 connects to the positioning groove 10. Ventilation holes are connected through the groove walls on both sides of the positioning groove 101. The line connecting the ventilation holes on the groove walls on both sides of the positioning groove 101 passes through the axis of the drive shaft 100. The ventilation holes are used by the air gauge 20 to inject airflow to measure the outer diameter of the drive shaft 100 in the positioning groove 101. One end of the drive shaft 100 abuts against the positioning unit 10. A measuring needle 342 is movably disposed on the length gauge 30. The telescopic end of the measuring needle 342 is used to abut against the other end of the drive shaft 100 to measure the length of the drive shaft 100.

[0030] Please see Figure 3 In this embodiment, the distance between the groove walls on opposite sides of the positioning groove 101 is greater than the outer diameter of the drive shaft 100, so as to ensure that the airflow injected into the drive shaft 100 by the air gauge 20 through the vent hole has sufficient travel space, and then the value of the outer diameter of the drive shaft 100 is displayed on the display panel of the air gauge 20.

[0031] The working principle of the air gauge 20 is to use compressed airflow to measure the gap between it and the drive shaft 100. The airflow rate and pressure are directly proportional to the gap, while the flow rate and pressure are inversely proportional. That is, when the gap increases, the airflow rate increases and the pressure decreases; when the gap decreases, the airflow rate decreases and the pressure increases. Through this relationship, the relationship curve of airflow rate and pressure relative to the gap can be obtained, and the relationship curve is linearly distributed within the measurement range.

[0032] Please see Figure 5 and Figure 6 The positioning groove 101 has a positioning part 105 on its bottom wall and / or side wall for positioning the drive shaft 100. In this embodiment, the positioning part 105 is inclined from the side wall to the bottom wall. In other embodiments, the positioning part 105 may also be set as an arc or an irregular shape corresponding to irregular products, so as to achieve the purpose of adapting to and positioning the product. No special limitation is made here.

[0033] Please see Figures 3-5 The positioning unit 10 has a positioning block 13 installed at one end of the drive shaft 100. The positioning block 13 and the positioning unit 10 together form the positioning groove 101. The positioning groove 101 has an opening facing the measuring needle 342 of the length gauge 30. One end of the drive shaft 100 abuts against the positioning block 13, and the other end of the drive shaft 100 extends toward the length gauge 30.

[0034] For more details, please refer to Figures 5-6 and Figure 9 The drive shaft 100 has a first outer diameter 110, a second outer diameter 120, and a third outer diameter 130. The air gauge 20 includes a first air gauge 21, a second air gauge 22, and a third air gauge 23. The first air gauge 21 is used to measure the size of the first outer diameter 110 of the drive shaft 100, the second air gauge 22 is used to measure the size of the second outer diameter 120 of the drive shaft 100, and the third air gauge 23 is used to measure the size of the third outer diameter 130 of the drive shaft 100.

[0035] Please continue reading. Figure 5 and Figure 6 The groove walls on both sides of the positioning groove 101 include a first side wall 102, a second side wall 103, and a third side wall 104. The first side wall 102 is located on opposite sides of the first outer diameter 110, the second side wall 103 is located on both sides of the second outer diameter 120, and the third side wall 104 is located on both sides of the third outer diameter 130. The vent includes a first vent 1021 located on the first side wall 102, a second vent 1031 located on the second side wall 103, and a plurality of third vents 1041 located on the third side wall 104. The first vent 1021, the second vent 1031, and the plurality of third vents 1041 are located on the same horizontal line.

[0036] In this embodiment, there are multiple third vent holes 1041, and the multiple third vent holes 1041 are arranged at equal intervals along the extension direction of the axis of the transmission shaft 100.

[0037] In this embodiment, since the drive shaft 100 located at the third outer diameter 130 is relatively long along its axial extension direction, the air gauge 20 includes multiple third air gauges 23. Each third air gauge 23 is connected to a pair of third vent holes 1041. By simultaneously measuring the size of the third outer diameter 130 through multiple pairs of spaced third vent holes 1041, the outer diameter size at multiple points on the third outer diameter 130 can be measured to ensure that the measurement results are all within tolerance range, thereby making the measurement results more accurate. In this embodiment, the air gauge 20 includes three third air gauges 23. The three third air gauges 23 are respectively connected to three pairs of third vent holes 1041, thereby measuring the size of the third outer diameter 130 of the drive shaft 100 at the relative positions of the three third vent holes 1041.

[0038] Please see Figure 1 , Figure 2 , Figure 7 and Figure 8 The length gauge 30 includes a control unit and a measuring unit 34 electrically connected to each other. The measuring unit 34 is fixed on the positioning unit 10, and the measuring needle 342 is movably disposed on the measuring unit 34. More specifically, the control unit has a switch module 31, a display module 32, and a connecting line 33 connected to the measuring unit 34; the measuring unit 34 includes a measuring module 341, the measuring needle 342 movably connected to the measuring module 341, and a terminal 343 connected to the connecting line 33. The terminal 343 of the measuring unit 34 is electrically connected to the connecting line 33 of the control unit and transmits the data of the measuring unit 34 to the control unit and displays it in real time on the display module 32.

[0039] Furthermore, the telescopic end of the measuring needle 342 is provided with a measuring part 3421. In this embodiment, the measuring part 3421 is hemispherical to ensure that the measuring part 3421 contacts and measures the other end of the transmission shaft 100, thereby ensuring more accurate measurement data of the length dimension of the transmission shaft 100. In other embodiments, the measuring part 3421 may also be needle-shaped, and can also perform point contact measurement on the other end of the transmission shaft 100. The disadvantage is that the needle-shaped measuring part 3421 will experience greater wear after repeated measurements, affecting the measurement accuracy. Therefore, the measuring part 3421 of this application is hemispherical, which can improve the problems of the needle-shaped measuring part 3421.

[0040] Please see Figure 1 , Figure 3 and Figure 4The multi-size synchronous measurement device for the drive shaft also includes a fixing block 12. The fixing block 12 is located at the other end of the positioning unit 10 near the drive shaft 100 and is spaced apart from the positioning unit 10 to reserve travel space for the measuring needle 342. The measuring unit 34 is mounted on the fixing block 12, and the telescopic end of the measuring needle 342 is oriented toward the drive shaft 100.

[0041] Please see Figure 3 and Figure 4 The multi-size synchronous measurement device for the drive shaft also includes a positioning plate 11. The positioning unit 10 and the fixing block 12 are mounted on the positioning plate 11 to arrange the positioning unit 10 and the measuring unit 34 to fit the drive shaft 100 to be measured.

[0042] For more details, please refer to Figures 1-9 The drive shaft 100 is provided with a first positioning surface 140 facing the positioning block 13 and a second positioning surface 150 facing the measuring needle 342. In this embodiment, the first positioning surface 140 and the second positioning surface 150 are arranged parallel to each other and perpendicular to the axis of the drive shaft 100.

[0043] When the drive shaft of this utility model is used with a multi-size synchronous measuring device,

[0044] First, the drive shaft 100 is placed in the positioning groove 101 of the positioning unit 10 and positioned by the positioning part 105, wherein the first positioning surface 140 of the drive shaft 100 abuts against the positioning block 13, and the second positioning surface 150 is arranged toward the fixing block 12.

[0045] Then, the air gauge 20 and the length gauge 30 are started sequentially or synchronously. The first air gauge 21, the second air gauge 22, and the third air gauge 23 measure the dimensions of the first outer diameter 110, the second outer diameter 120, and the third outer diameter 130, respectively, and display the values ​​on the display panel. The measuring part 3421 of the measuring needle 342 of the measuring unit 34 extends towards the second positioning surface 150 and abuts against the second positioning surface 150. The display module 32 displays the measurement data of the length dimension of the drive shaft 100.

[0046] The measurement is now complete. The drive shaft 100 is removed, and the next measurement of the drive shaft 100 is performed.

[0047] The multi-dimensional synchronous measurement device for the drive shaft provided by this utility model measures the outer diameter of multiple dimensions of the drive shaft 100 through multiple air gauges 20, and simultaneously measures the length dimension of the drive shaft 100 through the length gauge 30, thereby realizing the simultaneous measurement of multiple dimensions of the drive shaft 100 and greatly improving the measurement efficiency.

[0048] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A multi-dimensional synchronous measuring device for drive shafts, characterized in that: The device includes a positioning unit for positioning a drive shaft, an air gauge connected to the positioning unit for measuring the outer diameter of the drive shaft, and a length gauge mounted on the positioning unit for measuring the length of the drive shaft. The positioning unit has a positioning groove for accommodating the drive shaft. The airflow pipe of the air gauge is connected to vent holes that penetrate through the groove walls on opposite sides of the positioning groove. The line connecting the vent holes on opposite sides of the groove walls passes through the axis of the drive shaft. The vent holes are used by the air gauge to inject airflow to measure the outer diameter of the drive shaft in the positioning groove. One end of the drive shaft abuts against the positioning unit. A measuring needle is movably mounted on the length gauge. The telescopic end of the measuring needle abuts against the other end of the drive shaft to measure the length of the drive shaft.

2. The multi-dimensional synchronous measurement device for drive shafts as described in claim 1, characterized in that: The distance between the groove walls on opposite sides of the positioning groove is greater than the outer diameter of the drive shaft.

3. The multi-dimensional synchronous measurement device for drive shafts as described in claim 1, characterized in that: The bottom wall and / or side wall of the positioning groove are provided with positioning parts for positioning the drive shaft.

4. The multi-dimensional synchronous measurement device for drive shafts as described in claim 1, characterized in that: The positioning unit has a positioning block installed at one end of the drive shaft. The positioning block and the positioning unit together form the positioning groove, and one end of the drive shaft abuts against the positioning block.

5. The multi-dimensional synchronous measurement device for drive shafts as described in claim 1, characterized in that: The drive shaft has a first outer diameter, a second outer diameter, and a third outer diameter. The air gauge includes a first air gauge, a second air gauge, and a third air gauge. The first air gauge is used to measure the size of the first outer diameter of the drive shaft, the second air gauge is used to measure the size of the second outer diameter of the drive shaft, and the third air gauge is used to measure the size of the third outer diameter of the drive shaft.

6. The multi-dimensional synchronous measurement device for drive shafts as described in claim 5, characterized in that: The groove walls on both sides of the positioning groove include a first side wall, a second side wall, and a third side wall. The first side wall is located on opposite sides of the first outer diameter, the second side wall is located on both sides of the second outer diameter, and the third side wall is located on both sides of the third outer diameter.

7. The multi-dimensional synchronous measuring device for drive shafts as described in claim 6, characterized in that: The ventilation holes include a first ventilation hole located on the first sidewall, a second ventilation hole located on the second sidewall, and a third ventilation hole located on the third sidewall, wherein the first ventilation hole, the second ventilation hole, and the third ventilation hole are located on the same horizontal line.

8. The multi-dimensional synchronous measuring device for drive shafts as described in claim 7, characterized in that: The number of the third vent holes is multiple, and the multiple third vent holes are arranged at equal intervals along the extension direction of the axis of the drive shaft.

9. The multi-dimensional synchronous measurement device for drive shafts as described in claim 1, characterized in that: The length gauge includes a control unit and a measuring unit that are electrically connected to each other. The measuring unit is fixed on the positioning unit, and the measuring needle is movably disposed on the measuring unit.

10. The multi-dimensional synchronous measuring device for drive shafts as described in claim 9, characterized in that: The multi-size synchronous measurement device for the drive shaft also includes a fixing block, which is located at the other end of the positioning unit near the drive shaft and spaced apart from the positioning unit. The measuring unit is mounted on the fixing block, and the telescopic end of the measuring needle is oriented toward the other end of the drive shaft.

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