A novel shell depth measuring head

Abstract

The utility model provides a novel shell depth measuring head, include: support, at least one detection rod and at least one displacement sensor, detection rod has the detection end for detecting the workpiece of being measured and opposite tail end, detection rod is movably installed on the support along its axial direction, the spring is set on detection rod, and the axial movement of its is provided with reset force by the spring, displacement sensor fixed mounting is on the support, and its detection end is opposite and keeps the interval with the tail end of detection rod. The utility model provides the reset force for detection rod through the spring, has guaranteed the stable, compliant contact of the detection end of detection rod and the surface of workpiece of being measured, avoided rigid impact and measurement fluctuation, simultaneously, displacement sensor fixed mounting is on the support and detects the displacement of detection rod tail end in non -contact mode, has eliminated the error of movable component fundamentally. The above structure cooperation effect, has realized convenient, efficient and reliable depth measurement under the prerequisite of guaranteeing the measurement accuracy and repeatability.

Description

Technical Field

[0001] This utility model relates to the field of depth measurement technology, specifically to a novel shell depth measuring head. Background Technology

[0002] In the precision assembly process of transmissions and electric drive assemblies, accurate measurement of the bearing mounting hole depth (housing depth) is a core prerequisite for ensuring the accuracy of subsequent bearing shim selection, thereby ensuring the overall shaft system assembly precision. Assembly precision directly affects the NVH (noise, vibration, and harshness) performance, transmission efficiency, and service life of the transmission or electric drive assembly.

[0003] Currently, traditional shell depth measurement solutions in the industry often face numerous challenges in meeting the demands of high-precision and high-efficiency modern production. For example, the accuracy of some structures using indirect measurement principles heavily depends on the machining accuracy and fit clearance of multiple kinematic pairs. Any minute deformation or wear will introduce and amplify errors in the transmission chain, leading to distorted measurement results. Furthermore, the complex kinematic pair structure results in the measurement equipment itself being complex, bulky, and time-consuming to operate. Utility Model Content

[0004] In order to solve the technical problems existing in the background art, this utility model proposes a novel shell depth measuring head.

[0005] This utility model proposes a novel shell depth measuring head, comprising: a support, at least one probe rod, and at least one displacement sensor, wherein:

[0006] The probe has a probe end for probing the workpiece and a tail end opposite thereto. The probe is movably mounted on a bracket along its axial direction. A spring is fitted on the probe, and the spring provides a restoring force for its axial movement.

[0007] The displacement sensor is fixedly mounted on the bracket, with its detection end facing the tail end of the probe and maintaining a distance.

[0008] Preferably, there are multiple probes, and each probe is arranged in a ring array along the circumference of the support, and a corresponding displacement sensor is configured at the tail end of each probe.

[0009] Preferably, the bracket includes an upper seat, a middle seat, and a lower seat arranged at intervals, and a main body connecting the three. The upper seat has multiple upper holes arranged in a circular array. The middle seat has a coaxial middle hole corresponding to each upper hole. The lower seat has a coaxial lower hole corresponding to each middle hole. The number of probes matches the number of upper holes, and each probe is sequentially inserted into the corresponding middle and lower holes and can move along its axial direction. The probe has a radially protruding limiting clip located between the middle seat and the lower seat. A spring is located between the middle seat and the lower seat, with its two ends abutting against the limiting clip and the middle seat respectively, and keeping the limiting clip against the lower seat under normal conditions. The number of displacement sensors matches the number of probes and is installed in each upper hole, corresponding to the tail end of the probe.

[0010] Preferably, a limiting block is provided between the limiting card and the middle seat, and the limiting block is fixedly connected to the middle seat or the lower seat.

[0011] Preferably, a bushing is embedded in the central hole, and the probe rod passes through the bushing.

[0012] Preferably, one end of the spring is fixed to the limiting clip, and the other end abuts against the lower end of the bushing or the lower end of the middle seat.

[0013] Preferably, a linear bearing is embedded in the lower hole, and the probe rod passes through the linear bearing.

[0014] Preferably, a tension sleeve is provided in the upper hole, at least one end of which extends to the outside of the upper hole and forms a locking part, and the locking part is composed of at least two plates distributed circumferentially; the displacement sensor passes through the tension sleeve, and a locking nut is fitted onto the locking part and threadedly engaged with the locking part, so that the locking part clamps the displacement sensor to achieve locking and fixing.

[0015] Preferably, the upper part is provided with mounting holes and is equipped with mounting bolts that are compatible with the mounting holes.

[0016] Preferably, the main body is located at the center of the upper seat, middle seat, and lower seat.

[0017] Preferably, there are three probe rods.

[0018] In this invention, a spring provides a restoring force to the probe rod, ensuring stable and smooth contact between the probe tip and the surface of the workpiece, avoiding rigid impacts and measurement fluctuations. Simultaneously, a displacement sensor is fixedly mounted on the bracket and detects the displacement of the probe rod's tail end in a non-contact manner, fundamentally eliminating errors caused by moving parts. The synergistic effect of these structures achieves convenient, efficient, and reliable depth measurement while ensuring measurement accuracy and repeatability. Furthermore, the overall structure is simple and lightweight, saving time and effort in operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a novel shell depth measuring head proposed in this utility model;

[0020] Figure 2 for Figure 1 Sectional view along axis AA;

[0021] Figure 3 This is an isometric view of a novel shell depth measuring head proposed in this utility model. Detailed Implementation

[0022] Reference Figure 1-3 This utility model proposes a novel shell depth measuring head, comprising: a bracket 1, at least one probe 2, and at least one displacement sensor 3, wherein:

[0023] The probe rod 2 has a probe end for probing the workpiece and a corresponding tail end. The probe rod 2 is movably mounted on the bracket 1 along its axial direction. A spring 4 is fitted onto the probe rod 2, and the spring 4 provides a restoring force for its axial movement. The displacement sensor 3 is fixedly mounted on the bracket 1, with its detection end opposite to and spaced from the tail end of the probe rod 2, for detecting the axial displacement of the probe rod 2.

[0024] During detection, the probe end of probe rod 2 is inserted into the area to be measured. Pressed against the surface of the workpiece, the probe end of probe rod 2 overcomes the force of spring 4 and moves axially relative to bracket 1. Simultaneously, displacement sensor 3, fixed to bracket 1, detects the axial displacement of the probe end in real time using a non-contact method, thereby directly obtaining the depth dimension. This structure ensures stable and smooth contact between the probe end and the workpiece surface through the spring 4's reset mechanism, effectively avoiding rigid impacts and measurement fluctuations. Furthermore, the fixed installation of displacement sensor 3 eliminates errors caused by moving parts, thus achieving convenient, efficient, and reliable depth measurement while ensuring measurement accuracy and repeatability.

[0025] In a further embodiment, the probe rods 2 are preferably arranged in a ring array along the circumference of the support 1, with each probe rod 2 having a corresponding displacement sensor 3 at its tail end. During measurement, the probe ends of each probe rod 2 can simultaneously contact different points on the surface being measured, and their corresponding displacement sensors 3 collect their respective axial displacement data. Then, by comprehensive processing, such as averaging, random errors introduced by single measuring point position deviations, local deformation of the workpiece, or slight tilting of the measuring head can be effectively offset, thereby making the detection results more realistic and accurate.

[0026] In a further embodiment, the upper part 11 is provided with mounting holes and is equipped with mounting bolts 11-1 that are adapted to the mounting holes. The entire measuring head can be fixed to external equipment or tooling by the mounting bolts 11-1 to facilitate measurement operations.

[0027] The bracket 1 in this embodiment includes an upper seat 11, a middle seat 12, and a lower seat 13 arranged at intervals, and a main body 14 connecting the three. Specifically, the main body 14 is located at the center of the upper seat 11, the middle seat 12, and the lower seat 13. The upper seat 11 has a plurality of upper holes arranged in a ring array around the outer periphery of the main body 14. The middle seat 12 has a coaxial middle hole corresponding to each upper hole, and the lower seat 13 has a coaxial lower hole corresponding to each middle hole.

[0028] The number of probe rods 2 matches the number of upper holes. Each probe rod 2 can be axially moved and sequentially inserted into the corresponding middle hole and lower hole, so as to use the middle hole and lower hole to form two precise guides for the probe rod 2. This structural design can effectively suppress the lateral sway of the probe rod 2 and ensure the straightness and accuracy of the axial movement of the probe rod 2.

[0029] The probe rod 2 is provided with a radially protruding limiting clip 5, which is located between the middle seat 12 and the lower seat 13. The spring 4 is located between the middle seat 12 and the lower seat 13, with its two ends abutting against the limiting clip 5 and the middle seat 12 respectively, and keeping the limiting clip 5 against the lower seat 13 under normal conditions, thereby providing a reset capability for the axial movement of the probe rod 2.

[0030] The number of displacement sensors 3 matches the number of probe rods 2, and they are installed one-to-one in each upper hole, opposite to the tail end of the probe rod 2, to detect the displacement of the corresponding probe rod 2. This structural design facilitates the disassembly, calibration, and replacement of individual displacement sensors 3, and also benefits wiring harness management, improving the maintainability of the equipment.

[0031] In a further embodiment, a limiting block 6 is provided between the limiting card 5 and the middle seat 12, and the limiting block 6 is fixedly connected to the middle seat 12 or the lower seat 13. The limiting block 6 can effectively limit the upper limit of the probe rod 2's upward movement and prevent the probe rod 2 from moving excessively upward.

[0032] Furthermore, a bushing 7 is embedded in the central hole, and the probe rod 2 passes through the bushing 7. At this time, one end of the spring 4 is fixed to the limiting clip 5, and the other end can preferably abut against the lower end of the bushing 7.

[0033] Furthermore, a linear bearing 8 is embedded in the lower hole, and the probe rod 2 passes through the linear bearing 8 to ensure the smoothness and accuracy of the axial movement of the probe rod 2.

[0034] Furthermore, a tensioning sleeve 9 is provided inside the upper hole, at least one end of which extends outside the upper hole and forms a locking part. This locking part consists of at least two circumferentially spaced plates. A displacement sensor 3 is disposed through the tensioning sleeve 9. A locking nut 10 is fitted onto the locking part and threadedly engages with the end of the tensioning sleeve 9 to lock and fix the displacement sensor 3 through the tensioning sleeve 9. Specifically, tightening the locking nut 10 forces the locking part to undergo radial deformation, thereby locking the displacement sensor 3 inside the tensioning sleeve 9. Loosening the locking nut 10 releases the locking part from the displacement sensor 3, allowing the displacement sensor 3 inside the tensioning sleeve to become movable. This structure employs a collaborative design between the tensioning sleeve 9 and the locking nut 10, allowing the radial deformation of the locking part to be controlled through simple tightening operations, thus achieving rapid locking and loosening of the displacement sensor 3. This structural design makes it extremely convenient to adjust and disassemble the displacement sensor 3 in the axial direction, thereby making it easy to calibrate the initial distance between it and the end of the probe rod 2.

[0035] As can be seen from the above, this utility model uses spring 4 to provide a restoring force for probe rod 2, ensuring stable and smooth contact between the probe end of probe rod 2 and the surface of the workpiece being measured, avoiding rigid impact and measurement fluctuations. Simultaneously, displacement sensor 3 is fixedly installed on bracket 1 and detects the displacement of the tail end of probe rod 2 in a non-contact manner, fundamentally eliminating errors caused by moving parts. The synergistic effect of these structures achieves convenient, efficient, and reliable depth measurement while ensuring measurement accuracy and repeatability. Furthermore, the overall structure is simple and lightweight, saving time and effort in operation. In addition, each probe rod 2, spring 4, and displacement sensor 3 in this utility model constitutes an independent measurement unit, distributed in a ring array around the main body 14. This layout design ensures that when the measuring head is used for high-precision measurement of complex surfaces, each probe rod 2 maintains uniform contact force under the action of the independent spring 4, and, in conjunction with the fixedly installed displacement sensor 3, achieves parallel precision measurement. The overall structure ensures measurement accuracy and stability while also possessing good overload protection and ease of maintenance.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A novel shell depth measuring head, characterized in that, include: The bracket (1), at least one probe (2), and at least one displacement sensor (3) are provided, wherein: The probe rod (2) has a probe end for probing the workpiece and a tail end opposite thereto. The probe rod (2) is movably mounted on the bracket (1) along its axial direction. A spring (4) is sleeved on the probe rod (2), and the spring (4) provides a restoring force for its axial movement. The displacement sensor (3) is fixedly installed on the bracket (1), with its detection end facing the tail end of the probe rod (2) and maintaining a distance.

2. The novel shell depth measuring head according to claim 1, characterized in that, Multiple probe rods (2) are provided, and each probe rod (2) is arranged in a ring array along the circumference of the support (1), and a corresponding displacement sensor (3) is configured at the tail end of each probe rod (2).

3. The novel shell depth measuring head according to claim 1, characterized in that, The bracket (1) includes an upper seat (11), a middle seat (12), and a lower seat (13) spaced apart from each other, and a main body (14) connecting the three. The upper seat (11) has multiple upper holes arranged in a circular array. The middle seat (12) has a coaxial middle hole corresponding to each upper hole. The lower seat (13) has a coaxial lower hole corresponding to each middle hole. The number of probes (2) matches the number of upper holes. Each probe (2) is sequentially inserted into the corresponding middle hole and lower hole and can move along its axial direction. The measuring rod (2) is provided with a radially protruding limiting clip (5), which is located between the middle seat (12) and the lower seat (13); the spring (4) is located between the middle seat (12) and the lower seat (13), and its two ends abut against the limiting clip (5) and the middle seat (12) respectively, so that the limiting clip (5) tends to abut against the lower seat (13) under normal conditions; the number of displacement sensors (3) matches the number of probes (2), and they are installed in each upper hole in a corresponding manner, and are opposite to the tail end of the probe (2).

4. The novel shell depth measuring head according to claim 3, characterized in that, A limiting block (6) is provided between the limiting card (5) and the middle seat (12), and the limiting block (6) is fixedly connected to the middle seat (12) or the lower seat (13).

5. The novel shell depth measuring head according to claim 3, characterized in that, A bushing (7) is embedded in the central hole, and the probe rod (2) passes through the bushing (7); one end of the spring (4) is fixed to the limiting clip (5), and the other end abuts against the lower end of the bushing (7) or the lower end of the central seat (12).

6. The novel shell depth measuring head according to claim 3, characterized in that, A linear bearing (8) is embedded in the lower hole, and the probe rod (2) passes through the linear bearing (8).

7. The novel shell depth measuring head according to claim 3, characterized in that, A tension sleeve (9) is provided in the upper hole. At least one end of the tension sleeve (9) extends to the outside of the upper hole and forms a locking part. The locking part is composed of at least two plates that are spaced apart in the circumferential direction. The displacement sensor (3) passes through the tension sleeve (9). A locking nut (10) is fitted on the locking part and threadedly engages with the locking part so that the locking part clamps the displacement sensor (3) to achieve locking and fixing.

8. The novel shell depth measuring head according to claim 3, characterized in that, The upper part (11) is provided with mounting holes and is equipped with mounting bolts (11-1) that are compatible with the mounting holes.

9. The novel shell depth measuring head according to claim 3, characterized in that, The main body (14) is located at the center of the upper seat (11), the middle seat (12) and the lower seat (13).

10. The novel shell depth measuring head according to any one of claims 1-9, characterized in that, There are three probe rods (2).

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