Probe for contourgraph to measure spline parts

Abstract

The utility model provides a probe for measuring spline parts by a contourgraph, and relates to the technical field of measuring probes, the probe comprises a probe head and a measuring rod, one end of the measuring rod is provided with an insertion part matched with a probe seat of the contourgraph, and the probe head is vertically inserted into the other end of the measuring rod; the probe provided by the utility model has the advantages of economy and practicability, and is provided with the probe head which can be independently replaced and the insertion part which is matched with the probe seat, so that the waste caused by discarding of the whole probe head due to abrasion of the probe head is avoided, the cost is reduced, and the probe head can be conveniently replaced. The frequent plugging of the probe seat is reduced, the positioning precision is maintained, and the accuracy and stability of measured data are guaranteed; and by means of convenient needle replacement operation, various spline measurement requirements can be flexibly met, and the working efficiency and universality are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of measuring probes, in particular to a measuring probe for measuring spline parts by a profilometer. BACKGROUND

[0002] A profilometer is a precision instrument used to measure the profile shape of an object's surface. It mainly works by a precise stylus contacting the surface of the measured object. When the stylus moves along the surface of the object, its vertical displacement will be detected by a sensor. For example, when measuring the surface roughness of a machined part, the stylus will move up and down with the slight undulations of the part's surface, and the sensor will convert this mechanical displacement into an electrical signal. Then, through the internal signal processing system, the electrical signal is amplified, digitized, and according to the pre-set measurement range and resolution, the height data of the surface profile is calculated. These data can be used to evaluate the roughness, waviness and other parameters of the surface. In the actual production and quality control process of spline parts, profilometers are used to measure parameters such as tooth shape, pitch, and tooth direction, to ensure the fitting accuracy and transmission performance of spline parts. The existing profilometer measuring probe usually includes a needle and a measuring rod, the needle is fixed at one end of the measuring rod, and the other end of the measuring rod is inserted into the measuring probe base of the profilometer.

[0003] However, when measuring various spline parts, according to the specific characteristics and measurement requirements of the parts, different needle measuring probes need to be replaced to ensure measurement accuracy. The common practice is to pull out the entire measuring probe from the measuring probe base of the profilometer, and replace it with the required measuring probe, without the function of replacing the needle alone. This operation method has significant drawbacks: on the one hand, the parts of the measuring probe other than the needle are often still in good condition and can continue to be used normally, but the entire measuring probe is replaced due to needle wear, which causes unnecessary waste of resources and significantly increases the use cost; on the other hand, frequent insertion and removal of the entire measuring probe will cause repeated friction and impact on the connection between the measuring probe base and the measuring probe, which will eventually cause the connection to loosen and affect the positioning accuracy, thereby interfering with the accuracy of the measurement data. SUMMARY

[0004] The purpose of the present application is to provide a measuring probe for profilometer measurement of spline parts, which can solve the technical problem that the existing profilometer measuring probe does not have the function of replacing the needle alone.

[0005] The present application provides a measuring probe for profilometer measurement of spline parts, comprising a needle and a measuring rod, one end of the measuring rod is provided with an insertion part adapted to the profilometer measuring probe base, the needle is vertically inserted into the other end of the measuring rod, and the end of the measuring rod close to the needle is provided with a locking member for locking the needle on the measuring rod.

[0006] Further, the measuring rod is provided with a first insertion hole and a second insertion hole at one end away from the insertion part, the first insertion hole is perpendicular to the axial direction of the measuring rod, the second insertion hole is perpendicular to the first insertion hole and penetrates the first insertion hole, the needle is provided with a locking through hole, the needle is partially inserted into the first insertion hole, and the locking member is inserted into the second insertion hole and penetrates the locking through hole.

[0007] Further, the bottom of the second insertion hole is provided with a magnet, the locking member comprises a locking rod and an end cap, the end cap is fixedly arranged at one end of the locking rod, and the other end of the locking rod is inserted into the second insertion hole and is connected with the magnet in a magnetically adsorbed mode.

[0008] Further, the end cap is provided with symmetrical arc-shaped grooves.

[0009] Further, the first insertion hole penetrates the measuring rod, the needle penetrates the first insertion hole, the locking through hole is located in the middle of the needle, and the needle is a common needle with two ends.

[0010] Further, the needle is provided with a first positioning section, and the outer diameter of the first positioning section is greater than the inner diameter of the first insertion hole.

[0011] Further, one end of the measuring rod close to the insertion part is provided with a second positioning section, and the outer diameter of the second positioning section is greater than the inner diameter of the insertion interface of the profilometer measuring needle base.

[0012] The measuring needle has the advantages that:

[0013] The measuring needle has the advantages that: BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of the drawings.

[0015] Figure 1 The structure schematic diagram in some embodiments of the present application;

[0016] Figure 2 The top view in some embodiments of the present application;

[0017] Figure 3 is a sectional view of some embodiments of the present application;

[0018] Figure 4 is a structural exploded schematic view of some embodiments of the present application;

[0019] The reference signs are respectively:

[0020] 1, needle; 2, measuring rod; 3, insertion part; 4, locking piece; 41, locking rod; 42, end cap; 421, arc-shaped groove; 5, first insertion hole; 6, second insertion hole; 7, locking through hole; 8, magnet; 9, first positioning section; 10, second positioning section. DETAILED DESCRIPTION

[0021] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0023] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0024] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0025] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0026] In the description of the present application, it should also be noted that unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. Specific embodiments

[0027] As Figures 1-4 shown, the present application provides a measuring needle for profile gauge to measure spline parts, which comprises a needle head 1 and a measuring rod 2, one end of the measuring rod 2 is provided with a plug-in part 3 matched with the profile gauge measuring needle seat, the needle head 1 is vertically inserted into the other end of the measuring rod 2, and the end of the measuring rod 2 close to the needle head 1 is provided with a locking part 4 for locking the needle head 1 on the measuring rod 2. Compared with the traditional way of replacing the whole measuring needle when the needle head 1 is worn out, the worn-out needle head 1 can be replaced alone, and the measuring rod 2 can be reused as long as it is not damaged, greatly reducing the material waste caused by discarding the whole measuring needle due to the failure of part of the components (only the needle head 1), and significantly reducing the equipment consumable cost in the long run. The economic benefit is particularly prominent for scenes where spline measurement work is frequently carried out; when facing measurement task switching, adjusting the specification of the needle head 1, or the needle head 1 is worn out, damaged, etc., only the needle head 1 needs to be replaced, without going through the tedious process of pulling out the whole measuring needle from the measuring needle seat and installing a new measuring needle as before, simplifying the maintenance steps, saving operation time, and enabling the measurement operation to be more compact and continuous, improving the overall work efficiency; in addition, it can reduce the frequent plug-in and plug-out operation of the measuring needle seat, avoiding the repeated friction and impact on the connection part of the measuring needle seat and the measuring needle during the plug-in and plug-out process of the traditional whole replacement of the measuring needle, and maintaining the original mechanical performance and positioning accuracy of the measuring needle seat to the greatest extent, ensuring the consistency of the installation state of the measuring needle each time, thereby guaranteeing the accuracy and stability of the spline part measurement data, meeting the high-precision measurement requirement; for spline parts with various specifications and shapes, the measuring requirements are different, and different types of needle heads 1 can be conveniently replaced to flexibly cope with complex and variable spline measurement scenes, such as switching different curvature, thickness and material of the needle head 1 to adapt to spline with different tooth shape and size, improving the universality and adaptability of the profile gauge for spline part measurement.

[0028] As Figure 3 andFigure 4 As shown, the distal end of the measuring rod 2 away from the insertion part 3 is provided with a first insertion hole 5 and a second insertion hole 6, the first insertion hole 5 is perpendicular to the axial direction of the measuring rod 2, the second insertion hole 6 is perpendicular to the first insertion hole 5 and penetrates the first insertion hole 5, the needle 1 is provided with a locking through hole 7, the needle 1 is partially inserted into the first insertion hole 5, the locking member 4 is inserted into the second insertion hole 6 and penetrates the locking through hole 7, the first insertion hole 5, the second insertion hole 6 and the locking through hole 7 are designed to cooperate with the locking member 4 to form a stable connection system, which can firmly lock the needle 1 on the measuring rod 2, even in the case of frequent contact, sliding through the complex profile of the spline, and can effectively prevent the needle 1 from loosening and shifting, ensuring the stability of the measurement and the accuracy of the data, and facilitating the quick insertion and removal of the locking member 4 to realize the convenient installation and replacement of the needle 1, meeting the needs of efficient measurement operation, saving time for adjustment, and improving the overall work efficiency of spline measurement.

[0029] As shown in Figure 3 , the bottom of the second insertion hole 6 is provided with a magnet 8, the locking member 4 includes a locking rod 41 and an end cap 42, the end cap 42 is fixedly arranged on one end of the locking rod 41, the other end of the locking rod 41 is inserted into the second insertion hole 6 and is connected with the magnet 8 by adsorption, the attraction of the magnet 8 ensures that the locking rod 41 is always in the set position under the conditions of daily measurement vibration and frequent use, effectively avoiding the problem of fixed failure of the needle 1 due to loosening, ensuring that the needle 1 and the measuring rod 2 are closely matched during the measurement process, maintaining the accuracy and reliability of the measurement data, and meeting the stringent requirements of high-precision spline measurement for stability.

[0030] As shown in Figure 4 , the end cap 42 is symmetrically provided with an arc-shaped groove 421, which provides a matching force point for the fingers of the operator, facilitating force control during the replacement operation of the needle 1, so that the hands can more stably and accurately control the action, reducing the probability of operation failure due to slipping and other unexpected conditions, and improving the operation efficiency and smoothness.

[0031] As shown in Figure 3 and Figure 4As shown, the first insertion hole 5 penetrates the measuring rod 2, the needle 1 penetrates the first insertion hole 5, the locking through hole 7 is located in the middle of the needle 1, the needle 1 is a common needle 1 at both ends, the first insertion hole 5 penetrates the measuring rod 2 and the needle 1 is a common needle 1 at both ends, which greatly expands the flexibility and functionality of the measuring needle. For different measurement positions of spline parts, different tooth surface orientations and other complex situations, the measuring needle does not need to be replaced, and only the two ends of the needle 1 are turned over to carry out measurement, which adapts to various measurement needs and improves the convenience of operation. The locking through hole 7 is placed in the middle of the needle 1, which is matched with the structure of penetrating the measuring rod 2. When the locking piece 4 is fixed, the needle 1 can be evenly and balancedly locked on the measuring rod 2, which strengthens the stability of the needle 1 under frequent measurement actions, effectively resists external interference during measurement, and ensures stable and reliable measurement accuracy. Even if the spline is measured for a long time and high intensity, it can also maintain good data accuracy.

[0032] As shown in Figures 1-4 , the needle 1 is provided with a first positioning section 9, and the outer diameter of the first positioning section 9 is greater than the inner diameter of the first insertion hole 5. When installing the needle 1, the first positioning section 9 acts as a reliable "limiting block" to accurately control the depth of the needle 1 inserted into the first insertion hole 5, ensuring that the needle 1 is in a standard and unified position relative to the measuring rod 2 after each installation, and ensuring that the measurement starting state is consistent, thereby improving the accuracy and repeatability of the measurement data.

[0033] As shown in Figures 1-4 , the second positioning section 10 is provided on one end of the measuring rod 2 close to the insertion part 3, and the outer diameter of the second positioning section 10 is greater than the inner diameter of the insertion interface of the profile gauge measuring needle seat. When the measuring needle is installed to the measuring needle seat, the second positioning section 10 acts as an intuitive and effective "limiting mark", and the operator can easily perceive the appropriate depth of the measuring needle insertion by it, avoiding excessive insertion to damage the internal structure of the measuring needle seat, ensuring the integrity of the equipment, and ensuring the uniformity of the installation depth of the measuring needle each time, laying a solid foundation for obtaining stable and accurate measurement data.

[0034] The above is only a preferred embodiment of the present application and is not intended to limit the present application. Those skilled in the art can make various changes and modifications to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A stylus for use in the measurement of spline-like parts on a profilometer, comprising a stylus head and a stylus stem, characterised in that: One end of the measuring rod is provided with a plug-in part matched with a profile gauge needle seat, the needle head is vertically inserted into the other end of the measuring rod, and the end of the measuring rod close to the needle head is provided with a locking part for locking the needle head on the measuring rod.

2. The stylus for measuring spline parts by a profilometer according to claim 1, wherein: The end of the measuring rod away from the plug-in part is provided with a first insertion hole and a second insertion hole, the first insertion hole is perpendicular to the axial direction of the measuring rod, the second insertion hole is perpendicular to the first insertion hole and penetrates the first insertion hole, the needle head is provided with a locking through hole, the needle head is partially inserted into the first insertion hole, and the locking part is inserted into the second insertion hole and penetrates the locking through hole.

3. The stylus for measuring spline parts by a profilometer according to claim 2, wherein: The bottom of the second insertion hole is provided with a magnet, the locking part comprises a locking rod and an end cap, the end cap is fixedly arranged on one end of the locking rod, and the other end of the locking rod is inserted into the second insertion hole and is connected with the magnet in a magnetically adsorbed manner.

4. The probe for measuring spline parts by a profilometer according to claim 3, wherein: Symmetrical arc-shaped grooves are arranged on the end cap.

5. The stylus for measuring spline parts by a profilometer according to claim 2, wherein: The first insertion hole penetrates the measuring rod, the needle head penetrates the first insertion hole, the locking through hole is located in the middle of the needle head, and the needle head is shared by both ends.

6. The stylus for measuring spline parts by a profilometer according to claim 5, wherein: A first positioning section is arranged on the needle head, and the outer diameter of the first positioning section is greater than the inner diameter of the first insertion hole.

7. The stylus for measuring spline parts by a profilometer according to claim 5, wherein: A second positioning section is arranged on the end of the measuring rod close to the plug-in part, and the outer diameter of the second positioning section is greater than the inner diameter of the plug-in interface of the profile gauge needle seat.

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