Shaft gear MDK value measuring mechanism

Abstract

The invention provides a shaft gear MDK value measuring mechanism, and the mechanism comprises a positioning part which is fixedly disposed on a rack; the first measuring mechanism is arranged on the rack in a sliding manner and is provided with a first measuring head and a measuring instrument which are used for being in contact with a measured component; the second measuring mechanism is arranged on the rack in a sliding manner and is provided with a second measuring head which is used for being contacted with the measured component and a reference part which is used for triggering the reading of the measuring instrument; measuring end points of the first measuring head and the second measuring head are located on a first axis; the first axis is vertically intersected with the central axis of the measured component; the measuring contact of the measuring instrument and the end point of the reference part are located on the second axis; and the first axis and the second axis are coaxial or parallel. According to the technical scheme of the invention, the method achieves the direct reading and calculation of the values related to the MDK through a single measurement instrument, and greatly reduces the cost of purchasing professional measurement equipment.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of precision detection of shaft gear parts, in particular to a measuring mechanism for MDK value of a shaft gear. BACKGROUND

[0002] The MDK value (i.e. the pitch circle diameter in the actual meshing state) of a shaft gear part is a key index for measuring the tooth thickness machining precision, predicting the assembly center distance and controlling the meshing. Accurate measurement of the parameter is an important link for ensuring the quality of gear transmission and batch production.

[0003] In actual production practice, the existing measurement methods have the following shortcomings: firstly, an indirect measurement method using simple tooling and traditional measuring tools is adopted. In this method, a standard measuring gear and a measured gear are installed on a slidable clamp, and manual reading is performed by using symmetrically arranged double micrometers, and then the MDK value is calculated. This process has the following defects: an operator must read the values of the two micrometers at the same time, which is poor in synchronization, low in efficiency and prone to errors; subsequently, the MDK value needs to be manually recorded and substituted into a formula for conversion, the whole process is long in value taking time, complicated in calculation, the measurement result depends on the skills and experience of the operator, and the repeatability and reliability are difficult to guarantee; secondly, a professional computer controlled gear measuring center is adopted. Although this kind of equipment can realize automatic measurement and calculation, the purchase cost and maintenance cost are high. At the same time, the system is complex, and professional personnel are required for operation and programming, which is too high for users and difficult to popularize.

[0004] Therefore, how to provide a low-cost and easy-to-operate shaft gear part MDK value measuring mechanism becomes a technical problem to be solved in the field. SUMMARY

[0005] Therefore, how to provide a low-cost and easy-to-operate shaft gear part MDK value measuring mechanism becomes a technical problem to be solved in the field.

[0006] According to the application, a shaft gear MDK value measuring mechanism is provided, which comprises: a positioning part fixedly installed on a rack for fixing and limiting a measured component; a first measuring mechanism slidably installed on the rack and having a first measuring head for contacting the measured component and a measuring instrument; a second measuring mechanism slidably installed on the rack and having a second measuring head for contacting the measured component and a reference part for triggering reading of the measuring instrument; the measuring ends of the first measuring head and the second measuring head are located on a first axis; the first axis and the center axis of the measured component are perpendicular to each other; the measuring contact of the measuring instrument and the end point of the reference part are located on a second axis; and the positional relationship between the first axis and the second axis is coaxial or parallel.

[0007] Optionally, the positioning part includes at least one positioning adapter, which is detachable.

[0008] Optionally, the first measuring mechanism includes: a first bearing portion for bearing the first probe and the measuring instrument; and a guide member fixedly connected to the frame, movably connected to the first bearing portion, and arranged parallel to the first axis, for allowing the first bearing portion to slide linearly relative to the frame.

[0009] Optionally, the inner contour of the guide member matches the outer shape of the first support portion, so that the first support portion can slide along the inner contour of the guide member.

[0010] Optionally, the first measuring mechanism further includes: a first elastic element, one end of which is fixedly connected to the frame and the other end of which is fixedly connected to the mounting base of the first probe, for providing a preload force to keep the first probe in contact with the component being measured.

[0011] Optionally, the second measuring mechanism includes: a second bearing portion for bearing the second probe and the reference portion; and a linear sliding mechanism disposed between the second bearing portion and the frame and parallel to the first axis, for causing the second bearing portion to slide linearly relative to the frame.

[0012] Optionally, the second measuring mechanism further includes a second elastic element, one end of which is fixed to the frame and the other end is fixedly connected to the second bearing portion, for providing a preload force to keep the second probe in contact with the component being measured.

[0013] Optionally, the shaft gear MDK value measuring mechanism further includes a bidirectional unlocking mechanism, which includes: a rod; a pivot fulcrum located in the middle region of the rod for rotatably mounting the rod to a frame; a first pushing part located on the rod and on one side of the pivot fulcrum; a second pushing part located on the rod and on the other side of the pivot fulcrum, with its setting side opposite to that of the first pushing part; a first protrusion on the first measuring mechanism and a second protrusion on the second measuring mechanism; wherein the position of the first protrusion corresponds to the position of the first pushing part, and the position of the second protrusion corresponds to the position of the second pushing part.

[0014] Optionally, the bidirectional unlocking mechanism further includes a third elastic element, one end of which is connected to the frame and the other end to the rod, for keeping the bidirectional unlocking mechanism in a non-pushing working state.

[0015] Optionally, the bidirectional unlocking mechanism further includes a damping structure for slowly contacting the measuring contact of the measuring instrument with the reference section.

[0016] According to the technical solution of this application, the value related to MDK can be directly read and calculated using only a single measuring instrument, overcoming the cumbersome process of traditional dual-meter measurement and the errors introduced therefrom; at the same time, while ensuring the stability and reliability of the measurement results, the cost of purchasing professional measuring equipment is greatly reduced, providing a cost-effective and easy-to-promote measurement solution.

[0017] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application, and the illustrative embodiments and descriptions thereof are used to explain this application. In the drawings: Figure 1 This is a perspective view of a shaft gear MDK value measuring mechanism according to a preferred embodiment of this application; Figure 2 This is a rear perspective perspective view of the shaft gear MDK value measuring mechanism according to a preferred embodiment of this application; Figure 3 This is a perspective view of the first measuring mechanism according to a preferred embodiment of this application; Figure 4 This is a perspective view of the second measuring mechanism according to a preferred embodiment of this application; Figure 5 This is a right-side perspective view of a bidirectional unlocking mechanism according to a preferred embodiment of this application; Figure 6 This is a left perspective view of a bidirectional unlocking mechanism according to a preferred embodiment of the present application. Detailed Implementation

[0019] The technical solution of this application will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] like Figures 1-4As shown, this application provides a shaft gear MDK value measuring mechanism, which includes: a positioning part 1, which is fixedly installed on a frame 5 for fixing and limiting the measured component; a first measuring mechanism 2, which is slidably installed on the frame 5 and has a first probe 21 for contacting the measured component and a measuring instrument 22; and a second measuring mechanism 3, which is slidably installed on the frame 5 and has a second probe 31 for contacting the measured component and a reference part 32 for triggering the reading of the measuring instrument 22. Before measurement, the first measuring mechanism 2 and the second measuring mechanism 3 need to be slid back to back along the frame 5 to move them to the clearance areas on both sides, leaving necessary operating space for the shaft gear workpiece to be placed in the positioning part 1 and positioned. The measuring endpoints of the first probe 21 and the second probe 31 are located on a first axis; the first axis intersects perpendicularly with the central axis of the measured component; therefore, the first axis is collinear with a diameter on the radial section of the measured component. The measuring contact 23 and the endpoint of the reference part 32 of the measuring instrument 22 are located on the second axis. The positional relationship between the first axis and the second axis is coaxial or parallel. When the above positional relationship exists, the measurement results of the first probe 21 and the second probe 31 can be fed back to the measuring instrument 22, and the measurement value can be reflected, so that the MDK value can be further calculated. In order to reduce errors, the positional relationship between the first axis and the second axis is preferably coaxial.

[0021] According to the technical solution of this application, the values ​​of MDK calculation can be directly read using only a single measuring instrument, overcoming the cumbersome process of traditional dual-meter measurement and the errors introduced therefrom; at the same time, while ensuring the stability and reliability of the measurement results, the cost of purchasing professional measuring equipment is greatly reduced, providing a cost-effective and easy-to-promote measurement solution.

[0022] To accommodate workpieces of different sizes, this mechanism is equipped with a set of detachable adapters. This set of adapters includes positioning adapters 11 of various sizes, which can be quickly changed according to the dimensions of the component being measured. Preferably, the positioning part 1 includes at least one positioning adapter 11, and the positioning adapter 11 is detachable. Figure 2 As shown, in this embodiment, as a disassembly method, the positioning adapter 11 is fixed to the positioning part 1 by bolts. It is conceivable that the positioning adapter 11 can also be detachably fixed to the positioning part 1 by means of slots or other methods.

[0023] like Figure 3As shown, the first measuring mechanism 2 includes a first support portion 24, which supports the first probe 21, the measuring instrument 22, and the guide member 25. The guide member 25 is fixedly connected to the frame 5, movably connected to the first support portion 24, and arranged parallel to the first axis, allowing the first support portion 24 to slide linearly relative to the frame 5. This causes the first probe 21 and the measuring instrument 22 to reciprocate linearly parallel to the first axis, with their relative positions fixed.

[0024] The guide member 25 and the first support portion 24 are movably connected. In one embodiment, the inner contour of the guide member 25 matches the outer shape of the first support portion 24, allowing the first support portion 24 to slide along the inner contour of the guide member 25. In this embodiment, as... Figure 3 As shown, the first support portion 24 is a round rod, and the guide member 25 is a fixed sliding sleeve whose inner diameter matches the outer diameter of the round rod, and the fixed sliding sleeve is fixedly installed on the frame 5. The guiding direction of the fixed sliding sleeve (i.e., the guide member 25) is set parallel to the first axis, thereby limiting the round rod (i.e., the first support portion 24) to slide along the first axis.

[0025] To avoid the need for constant manual adjustment of the tightness between the first probe 21 and the measured component during the measurement process and to maintain continuous contact between the first probe 21 and the measured component, an elastic element can be provided on the first measuring mechanism 2. During the assembly of the first measuring mechanism 2, this elastic element is installed in a pre-stretched or compressed state, so that after assembly, the elastic restoring force of the elastic element is converted into a force that provides pressure to the first probe 21, ensuring it always presses against the measured component. Preferably, the first measuring mechanism 2 further includes: a first elastic element 26, one end of which is fixedly connected to the frame 5, and the other end is fixedly connected to the mounting base 27 of the first probe 21, used to provide a pre-tightening force to keep the first probe 21 in contact with the measured component. The types of elastic elements that can be used include, but are not limited to, tension springs, gas springs, etc. When the first elastic element 26 is a tension spring, such as... Figure 3 As shown, the tension spring is arranged around the first bearing portion 24.

[0026] like Figure 4 As shown, the second measuring mechanism 3 includes: a second support portion 33, which supports the second probe 31 and the reference portion 32; and a linear sliding mechanism 34, which is disposed between the second support portion 33 and the frame 5 and parallel to the first axis, for causing the second support portion 33 to slide linearly relative to the frame 5. This causes the second probe 31 and the reference portion 32 to reciprocate linearly along the first axis, with their relative positions fixed.

[0027] As one embodiment, the linear sliding mechanism 34 includes a slide rail fixedly mounted on the frame 5 and a slide table slidably mounted on the slide rail. The slide table is mounted on the bottom of the second support portion 33. In order to make the mechanism stable during sliding, as one embodiment, two slide tables are provided and arranged end to end at the bottom of the second support portion 33.

[0028] To avoid the need for constant manual adjustment of the tightness between the second probe 31 and the measured component during the measurement process, and to maintain continuous contact between the second probe 31 and the measured component, an elastic element can be provided on the second measuring mechanism 3. During the assembly of the second measuring mechanism 3, this elastic element is installed in the mechanism in a pre-stretched or compressed state, so that after assembly, the elastic restoring force of the elastic element is converted into a force that provides pressure to the second probe 31 against the measured component. Preferably, the second measuring mechanism 3 further includes a second elastic element 35, one end of which is fixed to the frame 5 and the other end is fixedly connected to the second bearing part 33, for providing a pre-tightening force to keep the second probe 31 in contact with the measured component. The type of the second elastic element 35 can be, but is not limited to, tension springs, gas springs, etc.

[0029] To overcome the inefficiencies and difficulty in fine-tuning when adjusting the first measuring mechanism 2 and the second measuring mechanism 3 separately during measurement, and to ensure the synchronization of the first measuring mechanism 2 and the second measuring mechanism 3 to improve measurement accuracy, preferably, the shaft gear MDK value measuring mechanism further includes a bidirectional unlocking mechanism 4. This bidirectional unlocking mechanism 4 includes: a rod 41; a pivot fulcrum 42, which is located in the middle region of the rod 41 and is used to rotatably mount the rod 41 onto the frame 5; and a first pushing part 43. A first measuring mechanism 2 has a first protrusion 28, and a second measuring mechanism 3 has a second protrusion 36; wherein the position of the first protrusion 28 corresponds to the position of the first pushing part 43, and the position of the second protrusion 36 corresponds to the position of the second pushing part 44. The first measuring mechanism 2 is mounted on the rod 41 and located on one side of the pivot 42; a second pushing part 44 is mounted on the rod 41 and located on the other side of the pivot 42, with its mounting side opposite to the mounting side of the first pushing part 43; an operating handle 45 is mounted at the end of the rod 41; the first measuring mechanism 2 has a first protrusion 28, and the second measuring mechanism 3 has a second protrusion 36; wherein the position of the first protrusion 28 corresponds to the position of the first pushing part 43, and the position of the second protrusion 36 corresponds to the position of the second pushing part 44. Figures 5-6As shown, in this embodiment, when the first pushing part 43 is placed on the higher side and the second pushing part 44 is placed on the lower side, before measurement, the lever 45 is held to drive the rod 41 to rotate counterclockwise around the pivot point 42. Then the first pushing part 43 and the second pushing part 44 move synchronously in opposite directions and push the first protrusion 28 and the second protrusion 36 respectively, so that the first measuring mechanism 2 and the second measuring mechanism 3 slide in the opposite direction from the positioning part 1, so that they move to the avoidance area on both sides respectively, leaving the necessary operating space for the shaft and gear workpiece to be placed in the positioning part 1 and completed positioning. During measurement, the lever 45 is released, so that the first measuring mechanism 2 and the second measuring mechanism 3 slide freely toward the measured component under the action of the elastic restoring force of their respective mechanisms, so that the first probe 21 and the second probe 31 abut against the measured component.

[0030] Because the bidirectional unlocking mechanism 4 lacks an effective positioning and holding function, it is prone to accidental rotation when subjected to slight external force or unintentional contact by the operator, thus interfering with the measurement process. Therefore, a positioning fixing component is required to force the bidirectional unlocking mechanism 4 to maintain a preset non-pushing posture when not in operation. Preferably, the bidirectional unlocking mechanism 4 further includes a third elastic element 46, one end of which is connected to the frame 5 and the other end to the rod 41, to keep the bidirectional unlocking mechanism 4 in a non-pushing working state.

[0031] By installing the third elastic element 46 in its relaxed state and connecting its two ends to the rod 41 and the frame 5 respectively, the rod 41 is stably maintained in a preset position by the elastic force when not pushing. When it is necessary to rotate the rod 41 to enter the pushing working state, the operator must actively apply force to overcome the elastic tension; and once the operating handle 45 is released, the elastic tension will immediately pull the rod 41 back to the preset non-pushing state, effectively preventing accidental rotation caused by accidental contact.

[0032] To prevent the bidirectional unlocking mechanism 4 from rotating too quickly due to excessive operating force, preferably, the bidirectional unlocking mechanism 4 also includes a damping structure to allow the measuring contact 23 of the measuring instrument 22 to slowly contact the reference part 32, thereby protecting the measuring instrument 22 and preventing damage caused by rapid contact. In one embodiment, the damping structure is a friction ring surrounding the pivot point 42, which adjusts the rotational speed by providing frictional resistance when the rod 41 rotates around the pivot point 42. In another embodiment, the damping structure is a threaded fastener on the pivot point 42; by tightening the threaded fastener, pressure is transmitted and the coefficient of friction is increased, thus adjusting the rotational speed.

[0033] The preferred embodiments of this application have been described in detail above. However, this application is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this application, various simple modifications can be made to the technical solution of this application, and these simple modifications all fall within the protection scope of this application.

[0034] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not describe the various possible combinations separately.

[0035] Furthermore, various different implementations of this application can be combined in any way, as long as they do not violate the spirit of this application, they should also be regarded as the content disclosed in this application.

Claims

1. A shaft gear MDK value measuring mechanism, characterized in that, The MDK value measuring mechanism for this shaft gear includes: Positioning part (1), which is fixedly installed on the frame (5) and is used to fix and limit the measured component; A first measuring mechanism (2) is slidably mounted on a frame (5) and has a first probe (21) for contacting the component being measured and a measuring instrument (22). The second measuring mechanism (3) is slidably mounted on the frame (5) and has a second probe (31) for contacting the component being measured and a reference part (32) for triggering the reading of the measuring instrument (22). The measuring endpoints of the first probe (21) and the second probe (31) are located on the first axis; The first axis intersects perpendicularly with the central axis of the component being measured; The measuring contact (23) and the endpoint of the reference part (32) of the measuring instrument (22) are located on the second axis; The first axis and the second axis are either coaxial or parallel.

2. The shaft gear MDK value measuring mechanism according to claim 1, characterized in that, The positioning part (1) includes at least one positioning adapter (11), which is detachable.

3. The shaft gear MDK value measuring mechanism according to claim 1, characterized in that, The first measuring mechanism (2) includes: A first support portion (24) is used to support the first probe (21) and the measuring instrument (22); and The guide (25) is fixedly connected to the frame (5), movably connected to the first support part (24), and arranged parallel to the first axis, for making the first support part (24) slide linearly relative to the frame (5).

4. The shaft gear MDK value measuring mechanism according to claim 3, characterized in that, The inner contour of the guide (25) matches the outer shape of the first support portion (24) so ​​that the first support portion (24) can slide along the inner contour of the guide (25).

5. The shaft gear MDK value measuring mechanism according to claim 4, characterized in that, The first measuring mechanism (2) further includes: The first elastic element (26) is fixedly connected at one end to the frame 5 and at the other end to the mounting base (27) of the first probe (21), and is used to provide a preload force to keep the first probe (21) in contact with the component being measured.

6. The shaft gear MDK value measuring mechanism according to claim 1, characterized in that, The second measuring mechanism (3) includes: The second support portion (33) is used to support the second probe (31) and the reference portion (32); and A linear sliding mechanism (34) is disposed between the second bearing part (33) and the frame (5) and is parallel to the first axis, for making the second bearing part (33) slide linearly relative to the frame (5).

7. The shaft gear MDK value measuring mechanism according to claim 6, characterized in that, The second measuring mechanism (3) also includes: The second elastic element (35) is fixed at one end to the frame (5) and at the other end to the second bearing part (33), and is used to provide a preload force to keep the second probe (31) in contact with the component being measured.

8. The shaft gear MDK value measuring mechanism according to claim 1, characterized in that, The shaft gear MDK value measuring mechanism also includes a bidirectional unlocking mechanism (4), which includes: Rod (41); A pivot point (42) is provided in the middle region of the rod (41) for rotatably mounting the rod (41) onto the frame (5); The first jacking part (43) is disposed on the rod (41) and located on one side of the pivot point (42); The second push part (44) is disposed on the rod (41) and located on the other side of the pivot point (42), and its disposal side is opposite to that of the first push part (43); The first measuring mechanism (2) is provided with a first protrusion (28), and the second measuring mechanism (3) is provided with a second protrusion (36); wherein the position of the first protrusion (28) corresponds to the first pushing part (43), and the position of the second protrusion (36) corresponds to the second pushing part (44).

9. The shaft gear MDK value measuring mechanism according to claim 8, characterized in that, The bidirectional unlocking mechanism (4) also includes a third elastic element (46), one end of which is connected to the frame (5) and the other end is connected to the rod (41), which is used to keep the bidirectional unlocking mechanism (4) in a non-pushing working state.

10. The shaft gear MDK value measuring mechanism according to claim 8, characterized in that, The bidirectional unlocking mechanism (4) also includes a damping structure for slowly contacting the measuring contact (23) of the measuring instrument (22) with the reference part (32).

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