A measuring aid

Abstract

This utility model relates to the field of gear measurement technology and discloses a measuring aid, including a mounting base, a double-column height gauge with dial indicator, a first support block, and a second support block. The double-column height gauge with dial indicator is located on one side of the upper end of the mounting base. The first support block and the second support block are both slidably mounted on the upper end of the mounting base. Both the first support block and the second support block are provided with positioning elements that can fix the first support block and the second support block to the mounting base. One end of the first support block is provided with a protrusion, and one end of the second support block is provided with a V-groove. The double-column height gauge with dial indicator is provided with a mounting block, and a micrometer is detachably mounted on the mounting block. The upper end surfaces of the first support block and the second support block support the end face of the gear to be measured, preventing the gear to be measured from shifting. After the micrometer is fixed by the mounting block, the measuring end face of the micrometer fits against the tooth groove of the gear to be measured, avoiding measurement errors caused by uneven force or posture deviation when the operator holds the gear, thus avoiding reference offset.

Description

Technical Field

[0001] This utility model relates to the field of gear measurement technology, and specifically to a measuring aid. Background Technology

[0002] The M-value, also known as the span distance and common normal length, is a core indicator for determining the pitch diameter accuracy and tooth thickness deviation of gears. It directly affects the smoothness of gear meshing, transmission efficiency, and service life. Therefore, M-value measurement is a key link in gear quality control. During measurement, the operator needs to hold the gear micrometer with one hand while manually fixing the gear being measured. Due to factors such as uneven grip strength and deviation in operating posture, the measuring end face of the gear micrometer is not parallel to the gear tooth groove reference surface. The measuring force cannot be applied in the direction perpendicular to the gear axis, resulting in contact deviation and failing to accurately reflect the actual tooth thickness and pitch diameter of the gear. To address this issue, we have proposed a measuring aid to solve the above problems. Utility Model Content

[0003] The present invention aims to provide a measuring aid to solve the problem that factors such as uneven grip strength and deviation in operating posture of the operator cause contact deviation, which makes it impossible to accurately reflect the actual tooth thickness and pitch diameter of the gear.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a measuring aid, comprising a mounting base, a double-column height gauge, a first support block, and a second support block. The double-column height gauge is disposed on one side of the upper end of the mounting base. The first support block and the second support block are both slidably disposed on the upper end of the mounting base, and the second support block is located between the first support block and the double-column height gauge. The first support block and the second support block can support the part to be measured. Both the first support block and the second support block are provided with positioning elements, which can fix the first support block and the second support block to the mounting base. The first support block has a protrusion at one end near the second support block, and the second support block has a V-groove at one end near the first support block. The double-column height gauge is provided with a mounting block, and a micrometer is detachably mounted on the mounting block.

[0005] The beneficial effects of this solution are as follows: A symmetrical positioning structure is formed by the engagement of the protrusion of the first support block and the V-groove of the second support block. The gear to be tested is placed between the first and second support blocks, and the distance between the first and second support blocks can be adjusted to accommodate gears of different specifications. The upper surfaces of the first and second support blocks support the end face of the gear to be tested, replacing the traditional handheld method. The first and second support blocks are then fixed by positioning components to prevent the gear to be tested from shifting. Simultaneously, the self-centering principle of the V-groove ensures that the axis of the gear to be tested remains parallel to the measuring reference. The micrometer is then positioned via a mounting bracket. After the mounting blocks are fixed, the measuring end face of the micrometer fits into the tooth groove of the gear to be measured, avoiding the phenomenon that the measuring end face of the micrometer is not parallel to the reference surface of the tooth groove of the gear to be measured due to uneven force or posture deviation when the operator holds the hand. This avoids measurement errors caused by reference offset. Furthermore, after the first support block and the second support block are centered on the gear to be measured, continuous measurement can avoid the need for the operator to count teeth, thereby improving measurement efficiency. This solution can also adjust the height of the micrometer with a double-column height gauge, allowing the measuring tool to measure different heights of the same gear to be measured, and can also meet the height adjustment requirements of different parts, improving the applicability of the measuring tool.

[0006] Preferably, as an improvement, the mounting base includes a base plate and two limiting rods. The two limiting rods are symmetrically arranged on both sides of the lower end of the base plate, and the ends of the two limiting rods that are far apart from each other are symmetrically provided with feet. A double-column height gauge is provided on the upper end of the base plate.

[0007] Preferably, as an improvement, both the first support block and the second support block are U-shaped, and the first support block and the second support block are slidably mounted on the outer wall of the two limiting rods.

[0008] The beneficial effects are as follows: by setting the first support block and the second support block as U-shaped, they can be directly slidably installed on the outer wall of the two limit rods without the need to set a guide rail structure on the upper end of the limit rods. They can be directly snapped on during installation and quickly removed during disassembly, which is convenient for subsequent replacement or maintenance.

[0009] Preferably, as an improvement, the positioning element is a screw, and the side walls of the first support block and the second support block are both provided with threaded holes that match the screw. The screw is located in the threaded hole and can abut against the outer wall of the limiting rod.

[0010] Preferably, as an improvement, a stop block is slidably installed on the upper end of the second support block, a positioning element is provided between the stop block and the second support block, and a V-groove is opened at the end of the stop block away from the height gauge of the double column.

[0011] The beneficial effect is that when measuring the disc-shaped gear, the first support block and the second support block can only support the disc-shaped gear, but cannot center it. By setting a stop block at the upper end of the second support block and centering the disc-shaped gear through the V-groove of the stop block, measurement errors are avoided.

[0012] Preferably, as an improvement, the upper end of the stop block is symmetrically provided with waist-shaped holes, and the screw is provided in the waist-shaped holes. The upper end of the second support block is provided with a threaded hole that matches the screw, and the screw is threadedly connected to the threaded hole.

[0013] The beneficial effects are: by opening the waist-shaped hole, the operator can adjust the stop block, thereby measuring the disc-shaped gears of different specifications, and fixing them with screws.

[0014] Preferably, as an improvement, the double-column height gauge includes a base, a double-column rack, a dial, a connecting block, and a locking frame. The base is located at the upper end of the base plate, the double-column rack is located at the upper end of the base, the dial is slidably mounted on the outer wall of the double-column rack, the connecting block is located at the end of the dial away from the double-column rack, and the locking frame is located at the end of the connecting block away from the double-column rack. The locking frame can fix the mounting block. Attached Figure Description

[0015] Figure 1 This is a top partial sectional view of the measuring aid according to an embodiment of the present invention; Figure 2 This is a partial sectional view of the measuring aid in an embodiment of the present invention. Figure 3 This is a partial sectional side view of the measuring aid according to an embodiment of the present invention. Detailed Implementation

[0016] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: base plate 1, limit rod 2, support leg 3, fixing block 4, base 5, double column rack 6, dial 7, connecting block 8, locking frame 9, mounting block 10, micrometer 11, first support block 12, second support block 13, positioning element 14, protrusion 15, V-groove 16, oblong hole 17, and stop block 18.

[0017] Example The basic implementation examples are as follows: Figures 1-3 As shown, Figure 1 The measuring aid shown includes a mounting base, a double-column height gauge, a first support block 12, and a second support block 13. The mounting base includes a base plate 1 and two limiting rods 2, as shown. Figure 1 The two limiting rods 2 shown are symmetrically fixedly installed at the left and right ends of the lower rear side of the base plate 1. Support legs 3 are symmetrically fixedly installed at the ends of the two limiting rods 2 that are far apart from each other. Figure 2 The support leg 3 shown is L-shaped to increase the stability of the mounting base, such as... Figure 3 The two limiting rods 2 shown are jointly fixed to the left ends of a fixing block 4. The fixing block 4, the base plate 1, and the two limiting rods 2 form a frame structure, increasing the stability of the mounting base. A double-column height gauge is fixedly installed on the upper end of the base plate 1. Figure 3 The double-column height gauge shown includes a base 5, a double-column rack 6, a dial 7, a connecting block 8, and a locking frame 9. The base 5 is fixedly installed on the upper end of the base plate 1, the double-column rack 6 is fixedly installed on the upper end of the base 5, the dial 7 is slidably installed on the outer wall of the double-column rack 6, the connecting block 8 is fixedly installed on the left end of the dial 7, and the locking frame 9 is detachably installed on the left end of the connecting block 8. A mounting block 10 is snapped into the locking frame 9. The mounting block 10 is h-shaped, and screws are symmetrically threaded on the upper end of the mounting block 10. A micrometer 11 is snapped into the opening at the left end of the mounting block 10, and the screw can penetrate the mounting block 10 and abut against the micrometer 11. In this embodiment, the micrometer 11 is a gear micrometer 11, and different models of micrometer 11 can be installed according to the specifications of the gear to be measured.

[0018] like Figure 2 The first support block 12 and the second support block 13 shown are both U-shaped, and the first support block 12 and the second support block 13 are slidably mounted on the outer walls of the two limiting rods 2, as shown. Figure 1 and Figure 3 The second support block 13 shown is located between the first support block 12 and the double-column height gauge. The first support block 12 and the second support block 13 can support the lower end face of the part to be measured, as shown. Figure 1 The first support block 12 and the second support block 13 shown are each provided with a positioning element 14 at their right ends. The positioning element 14 is a screw, which is a hexagonal head screw. The right ends of the side walls of the first support block 12 and the second support block 13 are each provided with threaded holes matching the screws. The screws are threaded into the threaded holes and can abut against the outer wall of the limiting rod 2. The positioning element 14 can fix the first support block 12 and the second support block 13 to the mounting base. Figure 1 The first support block 12 shown has a protrusion 15 integrally formed at its rear end, which can clamp the shaft of the gear under test. The second support block 13 has a V-groove 16 at its front end, which can center the gear under test. A stop block 18 is slidably mounted on the upper end of the second support block 13. Figure 1The stop block 18 shown has symmetrically formed waist-shaped holes 17 on its upper end, and the screw is located in the waist-shaped holes 17. The second support block 13 has symmetrically formed threaded holes on its upper end that match the screw. The screw is threadedly connected to the threaded holes. The front end of the stop block 18 has a V-groove 16. When measuring the disc-shaped gear to be measured, the first support block 12 and the second support block 13 can only support the disc-shaped gear to be measured, but cannot center it. By setting the stop block 18 on the upper end of the second support block 13 and centering the disc-shaped gear to be measured through the V-groove 16 of the stop block 18, measurement errors are avoided.

[0019] The specific implementation process is as follows: When measuring shaft and gear parts, the operator first installs the measuring aid without installing the stop block 18, and then fixes the micrometer 11 to the locking frame 9 using the mounting block 10. Next, the operator adjusts the positions of the first support block 12 and the second support block 13 according to the size of the micrometer 11. The operator then places the shaft and gear part between the first support block 12 and the second support block 13, ensuring that the upper ends of the first support block 12 and the second support block 13 jointly support the lower end of the shaft and gear part. Then, the operator pushes the first support block 12 towards the second support block 13, causing the protrusion 15 of the first support block 12 to push the shaft and gear part... The component abuts against the V-groove 16 of the second support block 13, thereby completing the centering of the shaft and gear parts. Then, the operator rotates each positioning component 14 to fix the first support block 12 and the second support block 13, preventing displacement of the shaft and gear parts during measurement. Finally, the M value of the shaft and gear parts is measured by adjusting the height of the micrometer 11. After fixing, the measuring end face of the micrometer 11 fits against the tooth groove of the gear to be measured, avoiding the phenomenon that the measuring end face of the micrometer 11 is not parallel to the reference surface of the tooth groove of the gear to be measured due to uneven force or posture deviation when the operator holds it, thus avoiding measurement errors caused by reference offset. When the operator measures the disc-shaped parts, the measuring tool needs to be equipped with a stop block 18. When the operator places the disc-shaped parts on the upper end of the first support block 12 and the second support block 13, the disc-shaped parts are pushed to abut against the V-groove 16 of the stop block 18, thereby completing the centering of the disc-shaped parts and ensuring that the axis of the disc-shaped parts is parallel to the measuring reference, thus avoiding errors when measuring the disc-shaped parts.

[0020] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A measuring aid, characterized in that: The device includes a mounting base, a dual-column height gauge, a first support block, and a second support block. The dual-column height gauge is located on one side of the upper end of the mounting base. Both the first and second support blocks are slidably mounted on the upper end of the mounting base, with the second support block positioned between the first support block and the dual-column height gauge. The first and second support blocks support the part to be measured. Both the first and second support blocks are equipped with positioning elements that fix the first and second support blocks to the mounting base. The first support block has a protrusion near the end of the second support block, and the second support block has a V-groove near the end of the first support block. The dual-column height gauge has a mounting block on which a micrometer can be detachably mounted.

2. The measuring aid according to claim 1, characterized in that: The mounting base includes a base plate and two limiting rods. The two limiting rods are symmetrically arranged on both sides of the lower end of the base plate. The ends of the two limiting rods that are far apart from each other are symmetrically provided with feet. A double-column height gauge is located on the upper end of the base plate.

3. A measuring aid according to claim 2, characterized in that: Both the first support block and the second support block are U-shaped, and the first support block and the second support block are slidably installed on the outer wall of the two limiting rods.

4. A measuring aid according to claim 3, characterized in that: The positioning element is a screw. The side walls of the first support block and the second support block are both provided with threaded holes that match the screw. The screw is located in the threaded hole and can abut against the outer wall of the limiting rod.

5. A measuring aid according to claim 4, characterized in that: A stop block is slidably installed on the upper end of the second support block, and a positioning component is provided between the stop block and the second support block. A V-groove is provided at the end of the stop block away from the height gauge of the double column.

6. A measuring aid according to claim 5, characterized in that: The upper end of the stop block is symmetrically provided with waist-shaped holes, and the screw is placed in the waist-shaped holes. The upper end of the second support block is provided with a threaded hole that matches the screw, and the screw is threadedly connected to the threaded hole.

7. A measuring aid according to claim 6, characterized in that: The double-column height gauge includes a base, a double-column rack, a dial, a connecting block, and a locking frame. The base is located at the upper end of the base plate, the double-column rack is located at the upper end of the base, the dial is slidably mounted on the outer wall of the double-column rack, the connecting block is located at the end of the dial away from the double-column rack, and the locking frame is located at the end of the connecting block away from the double-column rack. The locking frame can fix the mounting block.

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