A long axis measurement device
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG HANDONG MASCH CO LTD
- Filing Date
- 2025-10-31
- Publication Date
- 2026-08-07
AI Technical Summary
[0005]为解决加工初期对于待测长轴的轴向长度测量容易存在不够精准的问题，本实用新型提供一种长轴测量装置
[0015] As can be seen from the above technical solution, the beneficial effects of this utility model are: through the cooperation of the base, guide groove and drive component, after the long shaft to be measured is placed, the trajectory pen contacts the base under the pressure of the long shaft to be measured and can draw a mark. The accurate length of the long shaft to be measured can be indirectly obtained by measuring the trajectory distance, avoiding the measurement and reading errors that exist when directly measuring the long shaft to be measured; the device only needs to fix one end of the long shaft to be measured and push it to complete the length marking of the corresponding long shaft to be measured. The operation is simple and the measurement accuracy is improved.
Smart Images
Figure CN224608341U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of measuring equipment technology, specifically a long axis measuring device. Background Technology
[0002] As core equipment in modern manufacturing, CNC machine tools directly determine product quality and production costs through their machining accuracy and efficiency. Among the many key components of CNC machine tools, the long shaft under test plays a crucial role. The long shaft under test typically refers to shaft components used for spindle drive, whose main function is to transmit torque and speed, driving the cutting tool or workpiece to perform high-precision, high-efficiency cutting. Therefore, the long shaft under test must possess a series of excellent characteristics such as high precision, high torque, and high speed to meet the stringent requirements of high-speed, high-precision cutting.
[0003] With the continuous development of the manufacturing industry, the processing objects are becoming increasingly complex, placing higher demands on the functionality and adaptability of CNC machine tools. To cope with different processing scenarios (such as precision milling, heavy-duty cutting, and deep hole machining), various forms and structures of long axes under test have been developed. Currently, common types of long axes under test for CNC machine tools include, but are not limited to: linear long axes under test, electric spindles, electro-hydraulic spindles, and rolling guide power heads. These different types of long axes under test differ in structure, drive method, and performance focus, and are suitable for specific working ranges and processing tasks.
[0004] Therefore, as a core transmission component, the dimensional accuracy of the long shaft under test (especially key dimensions such as diameter, length, and runout) is fundamental to ensuring the overall machining accuracy of the machine tool. Thus, dimensional measurement of the long shaft under test is crucial in the initial machining stage, with the axial length data being particularly critical. In conventional operations, there is a problem of insufficient accuracy in measuring the long shaft under test during the initial machining phase. Utility Model Content
[0005] To address the problem of inaccurate axial length measurement of long shafts during the initial processing stage, this invention provides a long shaft measuring device.
[0006] This utility model is achieved through the following technical solution: A long axis measuring device includes a base with a guide groove and a guide channel axially arranged along the guide groove. A clamping member is provided in the guide channel. The upper part of the clamping member is provided with a locking screw for fixing the long axis to be measured. A downwardly extending trajectory pen extends through the lower part of the clamping member. The bottom of the trajectory pen is fixed in the clamping member at one end of the long axis to be measured and contacts the base when the top of the trajectory pen is pressed down by the long axis to be measured. A driving component is also provided on one side of the clamping member to move the clamping member along the guide channel.
[0007] Through the cooperation of the base, guide groove and drive assembly, after the long shaft to be measured is placed, the trajectory pen contacts the base under the pressure of the long shaft to be measured and can draw a mark. The accurate length of the long shaft to be measured is indirectly obtained by measuring the trajectory distance, avoiding the measurement and reading errors that exist when directly measuring the long shaft to be measured. This device only requires fixing one end of the long shaft to be measured and pushing it to complete the length marking of the corresponding long shaft to be measured. The operation is simple and improves the measurement accuracy.
[0008] A further improvement of this invention is that the clamping member has an inverted U-shaped structure, and the opening of the clamping member is oriented towards the side of the long shaft to be measured. The fact that the opening of the clamping member faces the side of the long shaft to be measured allows one end of the long shaft to extend into the clamping member and be fixed by the locking screw, thus improving the stability of the clamping.
[0009] A further improvement of this invention is that the bottom of the clamping member is connected to a support member that allows the trajectory pen to pass through. The support member is a U-shaped structure with the opening facing upwards. The support member cooperates with the clamping member to form a two-point constraint on the pen, ensuring the stability of the trajectory pen perpendicular to the base.
[0010] A further improvement of this utility model is that a baffle is connected to the lower part of the trajectory pen, and a tension spring is sleeved between the baffle and the support member. One end of the tension spring is connected to the support member, and the other end of the tension spring is connected to the baffle. This structural design, where one end of the tension spring is connected to the baffle mounted on the trajectory pen and the other end is connected to the support member, allows the trajectory pen to suspend above the base when no long axis to be measured is placed, preventing accidental contact. After placing the long axis to be measured, pressing down on the trajectory pen causes it to contact the base and create a mark.
[0011] A further improvement of this invention is that the clamping member is also provided with supporting protrusions, which are symmetrically arranged on both sides of the trajectory pen. The supporting protrusions cooperate with the locking screw to achieve equilateral triangular fixation of the long axis to be measured, which helps to improve the stability of the fixation of the long axis to be measured.
[0012] A further improvement of this invention is that one side of the guide groove is provided with multiple auxiliary support components evenly distributed along the axial direction of the long shaft to be measured. These auxiliary support components provide support for the long shaft to be measured, preventing the lack of support in the middle of the shaft during the clamping preparation stage, which would affect clamping and measurement accuracy.
[0013] A further improvement of this utility model is that the aforementioned auxiliary support assembly includes guide wheels and a second support rod. Two guide wheels are symmetrically arranged on both sides of the axial direction of the long shaft to be measured. The apex of the guide wheels and the apex of the support protrusion are on the same horizontal plane. The second support rod is mounted on a base, and the guide wheels are rotatably mounted on the second support rod. The guide wheels reduce wear on the long shaft to be measured as it passes through.
[0014] A further improvement of this invention is that the aforementioned drive assembly includes a lead screw, a servo motor, and a guide nut. The two ends of the lead screw are suspended on a guide groove via support seats. The guide nut is threaded onto the lead screw and positioned between the two support seats, and is detachably connected to the clamping component. The servo motor is coaxially connected to one end of the lead screw and mounted on the guide groove. The lead screw, servo motor, and guide nut drive the clamping component to move along the guide channel, forming a ball screw pair mechanism. This helps reduce vibration during the movement of the long shaft under test and facilitates rapid reset of the device.
[0015] As can be seen from the above technical solution, the beneficial effects of this utility model are: through the cooperation of the base, guide groove and drive component, after the long shaft to be measured is placed, the trajectory pen contacts the base under the pressure of the long shaft to be measured and can draw a mark. The accurate length of the long shaft to be measured can be indirectly obtained by measuring the trajectory distance, avoiding the measurement and reading errors that exist when directly measuring the long shaft to be measured; the device only needs to fix one end of the long shaft to be measured and push it to complete the length marking of the corresponding long shaft to be measured. The operation is simple and the measurement accuracy is improved. Attached Figure Description
[0016] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a first structural schematic diagram of a specific embodiment of the present utility model.
[0018] Figure 2 This is a second structural schematic diagram of a specific embodiment of the present utility model.
[0019] Figure 3 This is a schematic diagram of the first structure of the guide groove according to a specific embodiment of the present utility model.
[0020] Figure 4 This is a schematic diagram of the second structure of the guide groove in a specific embodiment of the present utility model.
[0021] Figure 5This is a cross-sectional structural diagram of the clamping assembly according to a specific embodiment of the present invention.
[0022] Figure 6 This is a schematic diagram of the overall structure of a specific embodiment of the present utility model.
[0023] In the attached diagram: 10, base; 20, guide groove; 21, guide channel; 22, support rod one; 23, trajectory of the extended cross-section of the guide groove; 30, drive assembly; 31, servo motor; 32, lead screw; 33, support seat; 34, guide nut; 40, clamping component; 41, locking screw; 42, support protrusion; 43, trajectory pen; 44, support component; 45, tension spring; 46, baffle; 50, auxiliary support assembly; 51, guide wheel; 52, support rod two. Detailed Implementation
[0024] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.
[0025] like Figures 1-6 As shown, this utility model discloses a long axis measuring device, including a base 10. The base 10 is provided with a guide groove 20 connected by a support rod 22. A guide channel 21 is provided on the guide groove 20 and arranged axially along the guide groove 20. A clamping member 40 is provided in the guide channel 21. The upper part of the clamping member 40 is provided with a locking screw 41 that can fix the long axis to be measured. A downwardly extending trajectory pen 43 passes through the lower part of the clamping member 40. The bottom of the trajectory pen 43 is in contact with the base 10 when one end of the long axis to be measured is fixed in the clamping member 40 and the top of the trajectory pen 43 is pressed down by the long axis to be measured. A driving component 30 is also provided on one side of the clamping member 40 that can drive the clamping member 40 to move along the guide channel 21. Through the cooperation of the base 10, guide groove 20 and drive assembly 30, when the long shaft to be measured is placed, the trajectory pen 43 contacts the base 10 under the pressure of the long shaft to be measured and can draw a mark. The accurate length of the long shaft to be measured is indirectly obtained by measuring the trajectory distance, avoiding the measurement and reading errors that exist when directly measuring the long shaft to be measured. This device only requires fixing one end of the long shaft to be measured and pushing it to complete the length marking of the corresponding long shaft to be measured. The operation is simple and improves the measurement accuracy.
[0026] The bottom of the trajectory pen 43 is pointed.
[0027] The clamping member 40 has an U-shaped structure, and the opening of the clamping member 40 is oriented towards the side of the long shaft to be measured. The opening of the clamping member 40 is oriented towards the side of the long shaft to be measured, so that one end of the long shaft to be measured extends into the clamping member 40 and is fixed by pressing it with the locking screw 41, which helps to improve the stability of clamping.
[0028] The clamping member 40 is also provided with a support protrusion 42, which is symmetrically arranged on both sides of the trajectory pen 43. The support protrusion 42 cooperates with the locking screw 41 to achieve equilateral triangular fixation of the long axis to be measured, which helps to improve the stability of the fixation of the long axis to be measured.
[0029] The support protrusion 42 is cylindrical and has chamfered edges to increase the contact area with the long axis to be measured.
[0030] This device can measure the length of long shafts with various diameters. Different diameter long shafts require different selections of the trajectory pen 43 to ensure that the trajectory pen 43 is in contact with the base 10 after the long shaft is fixed in the clamping member 40 and pressed down. The trajectory pen 43 should be a ballpoint pen or a marker pen, which will not show significant wear after marking. Since the lowest point of a smaller diameter long shaft is lower than that of a larger diameter long shaft after installation, multiple shims can be stacked on top of the trajectory pen 43 to allow for the addition or removal of shims according to the different diameter long shafts. Of course, sleeves or guide structures are required between the multiple shims and between the shims and the trajectory pen 43 to ensure coaxiality. Alternatively, multiple trajectory pens 43 of different lengths can be prepared. Considering that there may be some gap between multiple trajectory pens 43 of different lengths and the long shafts to be measured of different diameters, a compression spring can be added to the trajectory pen 43 to compensate for this. In this way, for the long shafts to be measured of different diameters, a trajectory pen 43 of slightly shorter length can be selected, and the compression spring can ensure that the trajectory pen 43 contacts the base 10 after the long shaft to be measured is placed.
[0031] When using it, after testing that the trajectory pen 43 can make contact with the base 10 or before testing, place the paper on the base 10 and the trajectory pen 43 will make a clear mark on the paper.
[0032] The inner surface of the guide groove 20 is arc-shaped to accommodate the long shaft to be measured with a larger diameter.
[0033] As shown in the appendix Figure 4As shown, the inner surface of the guide groove 20 is semi-circular. When the long shaft to be tested contacts the inner surface of the guide groove 20, the device can accommodate the long shaft with the largest diameter. At this time, the contact point between the support protrusion 42 and the long shaft to be tested, as well as the vertex of the trajectory pen 43 pressed down by the long shaft to be tested, are all on the trajectory 23 of the extended line of the cross section of the guide groove.
[0034] The clamping member 40 has a support member 44 at its bottom, allowing the trajectory pen 43 to pass through. The support member 44 is a U-shaped structure with its opening facing upwards. The support member 44 cooperates with the clamping member 40 to form a two-point constraint on the pen, ensuring the stability of the trajectory pen 43 perpendicular to the base 10. A baffle 46 is connected to the lower part of the trajectory pen 43. A tension spring 45 is sleeved between the baffle 46 and the support member 44. One end of the tension spring 45 is connected to the support member 44, and the other end is connected to the baffle 46. This structural design, where one end of the tension spring 45 is connected to the baffle 46 mounted on the trajectory pen 43 and the other end is connected to the support member 44, allows the trajectory pen 43 to suspend above the base 10 when no long shaft to be measured is placed, preventing accidental contact. After the long shaft to be measured is placed, pressing down on the trajectory pen 43 causes it to contact the base 10 and generate a mark.
[0035] The guide groove 20 is also provided with a plurality of auxiliary support components 50 evenly distributed along the axial direction of the long shaft to be measured on one side. The auxiliary support components 50 provide support for the long shaft to be measured, avoiding the lack of support in the middle of the long shaft to be measured during the clamping preparation stage of measurement, which would affect the clamping and measurement accuracy.
[0036] The auxiliary support assembly 50 includes guide wheels 51 and a second support rod 52. Two guide wheels 51 are symmetrically arranged on both sides of the long shaft to be measured. The apex of each guide wheel 51 is in the same horizontal plane as the apex of the support protrusion 42. The second support rod 52 is mounted on the base 10, and the guide wheels 51 are rotatably mounted on the second support rod 52. The guide wheels 51 reduce wear on the long shaft to be measured. The edges of the guide wheels 51 are also chamfered.
[0037] The drive assembly 30 includes a lead screw 32, a servo motor 31, and a guide nut 34. Both ends of the lead screw 32 are suspended on the guide groove 20 via support seats 33. The guide nut 34 is threaded onto the lead screw 32 and positioned between the two support seats 33, and is detachably connected to the clamping member 40. The servo motor 31 is coaxially connected to one end of the lead screw 32 and mounted on the guide groove 20. The lead screw 32, servo motor 31, and guide nut 34 drive the clamping member 40 to move along the guide channel 21, forming a ball screw pair mechanism. This helps reduce vibration during the movement of the long shaft under test and facilitates rapid reset of the device.
[0038] Specifically, the guide nut 34 and the outer wall of the support 44 are detachably connected, such as by a snap-fit assembly. This structure makes it easy to separate the clamping part 40 from the drive assembly 30 and remove it from the guide channel 21 for replacement of the trajectory pen 43 or repair of parts.
[0039] During testing, ensure that one end face of the long axis to be tested is in contact with the vertical inner wall of the clamping member 40. When there is a distance α between the trajectory pen 43 and the vertical inner wall of the clamping member 40, measure the length of α in advance. Finally, add the value of α to the marked trajectory data to obtain the complete length data of the long axis to be tested.
[0040] The specific length of α here is actually the distance from the position where the top of the trajectory pen 43 is perpendicular to the tip of the bottom of the trajectory pen 43 to the vertical inner wall of the clamping member 40.
[0041] To ensure measurement accuracy, an initial position corresponding to the trajectory pen 43 is pre-set on the inner groove surface of the guide groove 20 as a reference, and the trajectory pen 43 is stopped at this initial position before the test. After the test, the movement of the long axis under test is stopped until the tail end face of the long axis under test coincides with the initial position. At this time, the trajectory line value is read and the specific value of α is added.
[0042] Alternatively, a scale line corresponding to the guide channel 21 can be set on the base 10. The starting end of the scale line corresponds perpendicularly to the initial position where the trajectory pen 43 stops. The testing method is the same as above. The difference is that the trajectory pen 43 can be replaced with a pointer. The position of the scale line indicated by the pointer can be read directly, and then added to the specific value of α.
[0043] The present invention discloses a long axis measuring device. Through the cooperation of a base, a guide groove, and a drive assembly, when the long axis to be measured is placed, the trajectory pen contacts the base under the pressure of the long axis and can draw a mark. The accurate length of the long axis to be measured is indirectly obtained by measuring the trajectory distance, avoiding the measurement and reading errors that exist when directly measuring the long axis to be measured. This device only requires fixing one end of the long axis to be measured and pushing it to complete the length marking of the corresponding long axis to be measured. The operation is simple and improves the measurement accuracy.
[0044] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A long axis measuring device, comprising a base (10), characterized in that, The base (10) is provided with a guide groove (20), and a guide channel (21) is provided on the guide groove (20) along the axial direction of the guide groove (20). A clamping member (40) is provided in the guide channel (21). A locking screw (41) capable of fixing the long shaft to be measured is provided on the upper part of the clamping member (40). A downwardly extending trajectory pen (43) is passed through the lower part of the clamping member (40). The bottom of the trajectory pen (43) is fixed in the clamping member (40) at one end of the long shaft to be measured and contacts the base (10) when the long shaft to be measured is pressed down on the top of the trajectory pen (43). A driving component (30) capable of driving the clamping member (40) to move along the guide channel (21) is also provided on one side of the clamping member (40).
2. The long axis measuring device according to claim 1, characterized in that, The clamping member (40) has a U-shaped structure, and the opening of the clamping member (40) is set towards the side of the long axis to be measured.
3. The long axis measuring device according to claim 2, characterized in that, The clamping member (40) has a support member (44) at its bottom that allows the trajectory pen (43) to pass through. The support member (44) is a U-shaped structure with the opening facing upwards.
4. The long axis measuring device according to claim 3, characterized in that, The lower part of the trajectory pen (43) is connected to a baffle (46), and a tension spring (45) is sleeved between the baffle (46) and the support (44). One end of the tension spring (45) is connected to the support (44), and the other end of the tension spring (45) is connected to the baffle (46).
5. A long axis measuring device according to any one of claims 1 to 4, characterized in that, The clamping member (40) is also provided with a support protrusion (42), which is symmetrically arranged on both sides of the trajectory pen (43).
6. The long axis measuring device according to claim 5, characterized in that, The guide groove (20) is also provided with a plurality of auxiliary support components (50) evenly distributed along the axial direction of the long axis to be measured on one side.
7. The long axis measuring device according to claim 6, characterized in that, The auxiliary support assembly (50) includes a guide wheel (51) and a second support rod (52). There are two guide wheels (51), which are symmetrically arranged on both sides of the axial direction of the long shaft to be measured. The apex of the guide wheel (51) and the apex of the support protrusion (42) are in the same horizontal plane. The second support rod (52) is mounted on the base (10), and the guide wheel (51) is rotatably mounted on the second support rod (52).
8. The long axis measuring device according to claim 5, characterized in that, The drive assembly (30) includes a lead screw (32), a servo motor (31), and a guide nut (34). The two ends of the lead screw (32) are suspended on the guide groove (20) by support seats (33). The guide nut (34) is threaded on the lead screw (32) and located between the two support seats (33). The guide nut (34) is detachably connected to the clamping member (40). The servo motor (31) is coaxially connected to one end of the lead screw (32) and installed on the guide groove (20).