Internal spline large-diameter measuring instrument testing fixture

Abstract

The utility model relates to the technical field of detection tools, in particular to an internal spline large-diameter measuring instrument detection tool which comprises an operating rod, an instrument arranged at the top end of the operating rod and a measuring head arranged at the bottom end of the operating rod, and a pair of probes are symmetrically arranged in the measuring head along the central axis of the operating rod. The probe is in signal connection with the instrument; a limiting step is embedded between the bottom of the operating rod and the measuring head, and the outer diameter of the limiting step is far greater than the outer diameter of the internal spline; the device is placed in the spline for direct reading, so that the detection efficiency is improved, and the risk of defective products is reduced.

Description

Technical Field

[0001] This utility model relates to the field of testing tooling technology, and more specifically, to a large-diameter gauge for internal splines. Background Technology

[0002] The current technology for measuring the major diameter of the spline inside the motor shaft generally uses conventional vernier calipers, which has low efficiency and poor accuracy, and the readings are prone to errors, failing to meet the customer's requirement of 100% inspection. Utility Model Content

[0003] The purpose of this invention is to provide a large-diameter gauge with an internal spline, which can be placed inside the spline for direct reading, thereby improving testing efficiency and reducing the risk of defective products.

[0004] The embodiments of this utility model are achieved through the following technical solutions:

[0005] A large-diameter gauge for internal splines includes an operating lever, an instrument located at the top of the operating lever, and a measuring head located at the bottom of the operating lever. A pair of probes are symmetrically arranged inside the measuring head along the central axis of the operating lever, and the probes are connected to the instrument for signal transmission.

[0006] A limiting step is embedded between the bottom of the operating rod and the measuring head, and the outer diameter of the limiting step is much larger than the outer diameter of the internal spline.

[0007] Furthermore, the limiting step is a hollow cylinder, and the inner diameter of the limiting step does not exceed the outer diameter of the measuring head.

[0008] Furthermore, the outer surface of the measuring head is a toothed surface that matches the inner surface of the internal spline.

[0009] Furthermore, the measuring head has a hollow interior, and a pair of slots are symmetrically arranged on the outer surface of the measuring head along the central axis of the operating rod. The probe can reciprocate along the interior of the measuring head and the slots.

[0010] Furthermore, a fixed sleeve is provided inside the measuring head, and a pair of sliders are slidably arranged inside the fixed sleeve. The pair of sliders are symmetrically arranged along the central axis of the fixed sleeve, and an adjustment block is provided in the middle of the fixed sleeve. The two sides of the adjustment block are respectively wedge-shaped connected to the pair of sliders and can drive the sliders on both sides to move relative to each other or away from each other; a pair of probes are respectively arranged on the outside of the pair of sliders.

[0011] Furthermore, an adjustment rod is connected to the top of the adjustment block, and the adjustment rod extends upward from inside the operating rod to the top of the instrument.

[0012] Furthermore, a plurality of limiting springs are provided between the side of the slider near the side of the measuring head and the inner side of the measuring head.

[0013] Furthermore, the top surface of the fixed sleeve has an opening for the adjustment rod to move, and the inner diameter of the opening is smaller than the maximum size of the adjustment block.

[0014] Furthermore, the fixing sleeve is connected to the side of the measuring head via several support rods.

[0015] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects:

[0016] This invention features a reasonable design and simple structure. In use, the measuring head of the internal spline diameter gauge is inserted into the internal spline of the motor shaft. A pair of probes inside the measuring head then measure the inner diameter of the internal spline. Since the probes are connected to the instrument signal, the data measured by the probes can be directly displayed on the instrument, allowing operators to directly read the data, improving inspection efficiency and reducing the risk of defective products. Furthermore, to ensure consistency in the measurement position when inspecting different internal splines, this invention maintains a constant position for the measuring head within the internal spline using a limiting step. After the measuring head is inserted into the internal spline, the limiting step is located on the top surface of the internal spline, ensuring that the measuring head remains in a constant position when measuring in different internal splines. This maintains consistency in data measurement for different products, reduces data variability, and makes the inspection results more stable and accurate. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the internal spline large diameter measuring instrument fixture provided in this embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the measuring head provided in an embodiment of the present utility model;

[0020] Figure 3 A schematic diagram of the internal spline large diameter measuring instrument fixture in use, provided in an embodiment of this utility model.

[0021] Icons: 1-Adjusting rod, 2-Instrument, 3-Operating rod, 4-Limit step, 5-Measuring head, 6-Support rod, 7-Probe, 8-Adjusting block, 9-Slider, 10-Limit spring, 11-Fixing sleeve, 12-Internal spline. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Example 1

[0024] A large-diameter gauge for internal splines includes an operating lever 3, an instrument 2 located at the top of the operating lever 3, and a measuring head 5 located at the bottom of the operating lever 3. A pair of probes 7 are symmetrically arranged inside the measuring head 5 along the central axis of the operating lever 3, and the probes 7 are signal connected to the instrument 2.

[0025] A limiting step 4 is embedded between the bottom of the operating rod 3 and the measuring head 5, and the outer diameter of the limiting step 4 is much larger than the outer diameter of the inner spline 12.

[0026] Working Principle: In use, the measuring head 5 of the internal spline 12 large diameter measuring instrument is inserted into the internal spline 12 of the motor shaft. A pair of probes 7 inside the measuring head 5 then measure the inner diameter of the internal spline 12. Since the probes 7 are connected to the instrument 2, the data measured by the probes 7 can be directly displayed on the instrument 2, allowing operators to directly read the data, improving testing efficiency and reducing the risk of defective products. Furthermore, to ensure consistency in the measurement position when inspecting different internal splines 12, the measuring head 5 is kept in a constant position within the internal spline 12 using a limiting step 4. After the measuring head 5 is inserted into the internal spline 12, the limiting step 4 is located on the top surface of the internal spline 12, ensuring that the measuring head 5 remains in a constant position when measuring within different internal splines 12. This maintains consistency in data measurement for different products, reduces data variability, and makes the test results more stable and accurate.

[0027] In this embodiment, the limiting step 4 is a hollow cylinder, and the inner diameter of the limiting step 4 does not exceed the outer diameter of the measuring head 5, so that it can overlap the top surface of the inner spline 12 and will not slide down along the measuring head 5, thus maintaining the stability of the limiting step 4 in use.

[0028] In this embodiment, the outer surface of the measuring head 5 is a toothed surface that matches the inner surface of the inner spline 12, so that the fit with the inner surface of the inner spline 12 is more perfect and the measurement is more stable.

[0029] In this embodiment, the measuring head 5 has a hollow interior, and a pair of slots are symmetrically arranged on the outer side of the measuring head 5 along the central axis of the operating rod 3. The probe 7 can reciprocate along the interior of the measuring head 5 and the slots, which allows the probe 7 to move towards the inner side of the inner spline 12, thereby making the measurement of the inner diameter of the inner spline 12 more accurate.

[0030] In this embodiment, a fixed sleeve 11 is provided inside the measuring head 5. A pair of sliders 9 are slidably disposed inside the fixed sleeve 11. The pair of sliders 9 are symmetrically arranged along the central axis of the fixed sleeve 11, and an adjusting block 8 is provided in the middle of the fixed sleeve 11. An adjusting rod 1 is connected to the top of the adjusting block 8. The adjusting rod 1 extends upward from inside the operating rod 3 to above the instrument 2. The two sides of the adjusting block 8 are respectively wedge-shaped connected to the pair of sliders 9 and can drive the sliders 9 on both sides to move relative to each other or in opposite directions. A pair of probes 7 are respectively disposed on the outside of the pair of sliders 9. In use, by moving the adjusting rod 1 upward, the adjusting block 8 is driven to move upward, thereby driving the pair of wedge-shaped connected sliders 9 to move in opposite directions, so that the probes 7 extend out of the measuring head 5 until they abut against the inner side of the inner spline 12, thereby making the measurement data more accurate.

[0031] In this embodiment, a plurality of limiting springs 10 are provided between the side of the slider 9 near the side of the measuring head 5 and the inner side of the measuring head 5; thus, when the adjusting rod 1 moves downward, the slider 9 can be released and moved relative to the measuring head 5 under the elastic action of the limiting springs 10, so that the probe 7 can retract into the measuring head 5.

[0032] In this embodiment, the top surface of the fixed sleeve 11 is provided with an opening for the adjustment rod 1 to move. The inner diameter of the opening is smaller than the maximum size of the adjustment block 8, which facilitates the up and down movement of the adjustment rod 1 and prevents the adjustment block 8 from coming out, thus maintaining stability during use.

[0033] In this embodiment, the fixing sleeve 11 is connected to the side of the measuring head 5 by a plurality of support rods 6, thereby maintaining the stability of the fixing sleeve 11.

[0034] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A gauge for measuring the large diameter of an internal spline, characterized in that, It includes an operating lever, an instrument located at the top of the operating lever, and a measuring head located at the bottom of the operating lever. A pair of probes are symmetrically arranged inside the measuring head along the central axis of the operating lever, and the probes are connected to the instrument for signal transmission. A limiting step is embedded between the bottom of the operating rod and the measuring head, and the outer diameter of the limiting step is larger than the outer diameter of the internal spline.

2. The internal spline large diameter measuring instrument fixture according to claim 1, characterized in that, The limiting step is a hollow cylinder, and the inner diameter of the limiting step does not exceed the outer diameter of the measuring head.

3. The internal spline large diameter measuring instrument fixture according to claim 1, characterized in that, The outer surface of the measuring head is a toothed surface that matches the inner surface of the internal spline.

4. The internal spline large diameter measuring instrument fixture according to claim 1, characterized in that, The measuring head has a hollow interior, and a pair of slots are symmetrically arranged on the outer side of the measuring head along the central axis of the operating rod. The probe can reciprocate along the interior of the measuring head and the slots.

5. The internal spline large diameter measuring instrument fixture according to claim 4, characterized in that, The measuring head has a fixed sleeve inside, and a pair of sliders are slidably arranged inside the fixed sleeve. The pair of sliders are symmetrically arranged along the central axis of the fixed sleeve, and an adjustment block is provided in the middle of the fixed sleeve. The two sides of the adjustment block are respectively wedge-shaped connected to the pair of sliders and can drive the sliders on both sides to move relative to each other or away from each other. The pair of probes are respectively arranged on the outside of the pair of sliders.

6. The internal spline large diameter measuring instrument fixture according to claim 5, characterized in that, An adjustment rod is connected to the top of the adjustment block, and the adjustment rod extends upward from inside the operating rod to the top of the instrument.

7. The internal spline large diameter measuring instrument fixture according to claim 5, characterized in that, Several limiting springs are provided between the side of the slider near the side of the measuring head and the inner side of the measuring head.

8. The internal spline large diameter measuring instrument fixture according to claim 6, characterized in that, The top surface of the fixed sleeve has an opening for the adjustment rod to move, and the inner diameter of the opening is smaller than the maximum size of the adjustment block.

9. The internal spline large diameter measuring instrument fixture according to claim 5, characterized in that, The fixing sleeve is connected to the side of the measuring head by several support rods.

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