Groove width measuring jig

Abstract

The invention belongs to the technical field of measuring jigs, and discloses a groove width measuring jig. The groove width measuring jig comprises a base, a positioning piece, a guiding piece, a moving piece, a resetting piece and a measuring piece. According to the groove width measuring jig, the workpiece to be measured is placed on the jig to be detected, the workpiece does not need to be carried to a quality inspection center from a production station, secondary clamping of a special clamp is not needed, the risk that the workpiece is collided and damaged in the carrying process can be directly avoided, meanwhile, the operation time and precision loss of the clamping link are omitted, and the production efficiency is improved. And the real-time detection requirement in a high-efficiency production scene is met. Besides, as the positioning piece and the moving piece directly abut against the two side walls of the groove to be measured respectively, the reset piece provides pre-tightening force to ensure that the moving piece is always attached to the groove wall, and the guide piece limits the moving piece to move only in the direction perpendicular to the groove width direction, attaching deviation and direction deviation can be avoided, and the problems of manual reading errors and instable attaching are solved. And therefore, the detection requirements of high-precision parts can be met.

Description

Technical Field

[0001] This invention relates to the field of measuring fixture technology, and in particular to a slot width measuring fixture. Background Technology

[0002] In industrial manufacturing, mechanical transmission components, automobile chassis parts, machine tool fixtures, etc. often contain groove structures. The groove width accuracy is a core indicator of assembly adaptability and transmission stability. Deviations exceeding the range can easily lead to assembly jamming and transmission failure. Therefore, it is necessary to strictly inspect the groove width dimensions during production to ensure product quality.

[0003] Currently, the measurement of groove width mainly relies on two methods. One is to use the sliding jaws and fixed jaws of a vernier caliper to clamp the two side walls of the groove structure and then manually read the scale to obtain the groove width. The other is to use professional equipment in the quality inspection center (such as a coordinate measuring machine), which requires the workpiece to be transported from the production station to the quality inspection center, positioned and clamped by a special fixture, and then the equipment obtains the groove width data by probe scanning or contact measurement.

[0004] However, neither of the above two measurement methods can simultaneously meet the requirements of both measurement accuracy and efficiency. While vernier calipers eliminate the need for workpiece handling and are simple to operate, their accuracy is far from meeting the requirements for high-precision component inspection due to manual reading errors and jaw contact deviations. On the other hand, while specialized equipment in quality inspection centers can achieve high-precision measurements, it requires time-consuming workpiece handling, which is prone to collisions and damage. Secondary clamping reduces measurement and subsequent processing accuracy, while increasing inspection time and costs, making it difficult to balance production schedule and quality control, and thus unsuitable for the real-time inspection needs of high-efficiency production scenarios.

[0005] Therefore, the above problems urgently need to be solved. Summary of the Invention

[0006] The purpose of this invention is to provide a slot width measuring fixture that saves operation time and accuracy loss in the clamping process, eliminates human reading errors and unstable fit problems, and is suitable for real-time detection needs in high-efficiency production scenarios.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] A slot width measuring fixture includes a base, a positioning component, a guide component, a moving component, a resetting component, and a measuring component, wherein:

[0009] The positioning element is disposed on the base and is used to abut against an inner wall of the groove to be measured.

[0010] The guide component is disposed on the base;

[0011] The moving part is slidably engaged with the guide, and the moving part is used to abut against the other opposite inner wall of the groove to be measured. The moving part can be displaced in a direction perpendicular to the width of the groove to be measured, so that the moving part slides as the distance between the groove walls changes.

[0012] The reset member is disposed on the base and is configured to apply a preload force toward the other inner wall of the groove to be measured to the moving member, and is configured to allow the moving member to slide in the opposite direction due to changes in the groove width;

[0013] The measuring element is configured to detect the amount of displacement generated when the moving element abuts against the groove wall.

[0014] Preferably, the slot width measuring fixture further includes a pre-adjustment component disposed between the base and the positioning member. The pre-adjustment component is configured to drive the positioning member to move in a direction perpendicular to the slot width to be measured, so as to adjust the position of the positioning member relative to the base.

[0015] Preferably, the pre-adjustment component includes a drive member and a connector. The drive member is disposed on the base, and the connector is connected between the output end of the drive member and the positioning member. The drive member can drive the connector to move in a direction perpendicular to the width of the groove to be measured, so as to adjust the position of the positioning member relative to the base.

[0016] Preferably, the positioning element includes at least two spaced positioning posts, the axes of which are parallel to each other, and each positioning post is used to abut against the same inner wall of the groove to be measured.

[0017] Preferably, the measuring element includes a digital dial indicator mounted on the base, wherein the movement direction of the detection end of the digital dial indicator is consistent with the sliding direction of the moving element, and the detection end is correspondingly arranged with the moving element so that the detection end extends and retracts synchronously with the displacement of the moving element.

[0018] Preferably, the base is further provided with a stop block, which is located on the side of the moving part away from the positioning part, and the stop block is correspondingly provided to the moving part to limit the maximum sliding stroke of the moving part.

[0019] Preferably, the digital dial indicator is mounted on the stop block.

[0020] Preferably, the measuring device further includes a controller electrically connected to the digital dial indicator, the controller being configured to receive displacement data fed back by the digital dial indicator and calculate the actual groove width data of the groove to be measured.

[0021] Preferably, the reset component includes a reset spring, one end of which abuts against the base and the other end of which abuts against the moving component.

[0022] Preferably, the guide includes a linear guide rail and a base block. The linear guide rail is disposed on the base and has a bearing portion that moves in a direction perpendicular to the width of the groove to be measured. The base block is connected to the bearing portion, and the moving component is disposed on the base block.

[0023] The beneficial effects of this invention are:

[0024] The slot width measuring fixture provided by this invention allows for inspection simply by placing the workpiece to be measured on the fixture. There is no need to transport the workpiece from the production station to the quality inspection center, nor is there a need for secondary clamping with special fixtures. This directly avoids the risk of workpiece collision damage during transportation, while saving operation time and accuracy loss in the clamping process, making it suitable for real-time inspection needs in high-efficiency production scenarios.

[0025] Furthermore, since the positioning component and the moving component directly abut against the two side walls of the receiving measuring slot, and the reset component provides pre-tightening force to ensure that the moving component always fits against the slot wall, and the guide component limits the moving component to displacement only in the direction perpendicular to the slot width, it can avoid fitting deviation and directional offset. At the same time, the measuring component obtains data by detecting the displacement, replacing manual reading, eliminating human reading error and fitting instability, thereby meeting the testing requirements of high-precision parts. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the slot width measuring fixture provided by the present invention. Figure 1 ;

[0027] Figure 2 This is a schematic diagram of the structure of the slot width measuring fixture provided by the present invention. Figure 2 .

[0028] In the picture:

[0029] 1. Base; 11. Stop;

[0030] 2. Positioning component; 21. Positioning pin;

[0031] 3. Guide components; 31. Linear guide rail; 32. Base block;

[0032] 4. Moving parts;

[0033] 5. Reset component; 51. Reset spring; 52. Spring post;

[0034] 6. Measuring components; 61. Digital dial indicator;

[0035] 7. Pre-adjustment component; 71. Drive component; 72. Connector component. Detailed Implementation

[0036] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0037] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0038] In this application, the term "and / or" describes a relationship between related objects, indicating that three relationships can exist. For example, a centrifugal vortex magnetic pump and / or a centrifugal vortex magnetic pump can represent: the existence of only one centrifugal vortex magnetic pump, the simultaneous existence of one centrifugal vortex magnetic pump and a centrifugal vortex magnetic pump, or the existence of only one centrifugal vortex magnetic pump. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0039] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0040] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0041] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0042] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0043] Please see Figure 1 and Figure 2 This embodiment provides a slot width measuring fixture, which includes a base 1, a positioning member 2, a guide member 3, a moving member 4, a resetting member 5, and a measuring member 6. The positioning member 2 is disposed on the base 1 and is used to abut against one inner wall of the slot to be measured. The guide member 3 is disposed on the base 1. The moving member 4 is slidably engaged with the guide member 3, and the moving member 4 is used to abut against the other opposite inner wall of the slot to be measured. The moving member 4 can be displaced in a direction perpendicular to the slot width, so that the moving member 4 slides as the gap between the slot walls changes. The resetting member 5 is disposed on the base 1 and is configured to apply a preload force to the moving member 4 toward the other inner wall of the slot to be measured, and is configured to allow the moving member 4 to slide in the opposite direction due to changes in the slot width. The measuring member 6 is configured to detect the amount of displacement generated by the moving member 4 abutting against the slot wall.

[0044] During testing, firstly, one inner wall of the groove to be measured on the workpiece is brought into contact with the positioning element 2 on the base 1. Simultaneously, the resetting element 5 applies a preload to the moving element 4, pushing it to slide along the vertical groove width direction defined by the guide element 3 until it comes into contact with the other inner wall of the groove to be measured. If the groove width differs, the moving element 4 will adaptively slide in the opposite direction along the guide element 3, always maintaining contact with the inner wall. Subsequently, the measuring element 6 detects the displacement of the moving element 4, and, combined with the initial relative position parameters of the positioning element 2 and the moving element 4, calculates the actual groove width. After a single test is completed, the workpiece can be removed or replaced for the next test.

[0045] With this setup, the workpiece to be measured can be placed on the fixture for testing. There is no need to move the workpiece from the production station to the quality inspection center, nor is there a need for secondary clamping with special fixtures. This directly avoids the risk of workpiece collision damage during transportation, while saving operation time and accuracy loss in the clamping process, making it suitable for real-time testing needs in high-efficiency production scenarios.

[0046] Furthermore, since the positioning component 2 and the moving component 4 directly abut against the two side walls of the receiving measuring groove, and the reset component 5 provides pre-tightening force to ensure that the moving component 4 always fits against the groove wall, and the guide component 3 limits the moving component 4 to only move along the direction perpendicular to the groove width, it can avoid fitting deviation and directional offset. At the same time, the measuring component 6 obtains data by detecting the displacement amount to replace manual reading, eliminating human reading error and fitting instability, thereby meeting the testing requirements of high-precision parts.

[0047] It should be noted that the inner wall of the measuring groove mentioned above refers to the two side walls that are opposite to each other on the measuring groove body. The two side walls form the two boundaries in the width direction of the groove. One of them is a reference side wall that abuts against and fits against the positioning member 2 on the base 1. During the test, its stable abutment against the positioning member 2 provides a fixed reference for the displacement detection of the moving member 4. The other is a movable mating side wall that abuts against and fits against the moving member 4 in a sliding fit with the guide member 3.

[0048] To improve the applicability of the slot width measuring fixture, the slot width measuring fixture also includes a pre-adjustment component 7 disposed between the base 1 and the positioning member 2. The pre-adjustment component 7 is configured to drive the positioning member 2 to move in a direction perpendicular to the slot width to be measured, so as to adjust the position of the positioning member 2 relative to the base 1.

[0049] Understandably, by changing the initial relative distance between the positioning component 2 and the moving component 4, the fixture can be adapted to workpieces with different groove widths without changing the overall structure. This avoids the need to customize or replace special fixtures due to changes in workpiece specifications, reduces fixture investment costs and time wasted in replacing fixtures, and significantly improves the versatility of the fixture.

[0050] It is also understandable that the positioning component 2, as the reference end for measurement, directly determines the accuracy of the measurement starting point. If the positioning component 2 is offset due to initial installation error, long-term wear or vibration, the pre-adjustment component 7 can fine-tune the position of the positioning component 2 to reset it to the precise reference position, eliminate the measurement error caused by the reference offset, and further ensure the stability of the measurement accuracy.

[0051] Specifically, the pre-adjustment component 7 includes a drive component 71 and a connector 72. The drive component 71 is mounted on the base 1, and the connector 72 connects the output end of the drive component 71 to the positioning component 2. The drive component 71 can drive the connector 72 to move in a direction perpendicular to the width of the groove to be measured, thereby adjusting the position of the positioning component 2 relative to the base 1. By using the drive component 71 as a power source and mounting it on the base 1, transmission deviations caused by its own positional offset during power output can be avoided. The connector 72 can linearly transmit the power from the drive component 71 to the positioning component 2, ensuring that the positioning component 2 moves only in a direction perpendicular to the width of the groove to be measured, without trajectory deviation due to unstable power transmission paths. This ensures the directional accuracy of the positioning component 2's position adjustment and provides structural support for the accurate establishment of the measurement benchmark.

[0052] It should be noted that the drive component 71 can adopt any linear drive structure, such as a micro linear module, a micro electric push rod, or a manual adjusting screw. All of the above structures can achieve stable power output and displacement control in a specified direction, meeting the basic functional requirements of the positioning component 2 for position adjustment. Therefore, this embodiment does not limit the specific model of the drive component 71.

[0053] To ensure the reliability of the measurement reference, the positioning component 2 includes at least two spaced positioning posts 21, with the axes of each positioning post 21 parallel to each other, and each positioning post 21 is used to abut against the same inner wall of the groove to be measured. This arrangement provides multi-point support, avoiding wobbling or offset that may occur with single-point contact, making the positioning reference more stable. Simultaneously, the multi-point spaced abutment can accommodate minor unevenness that may exist on the inner wall, ensuring the reliability of the overall fit and preventing local protrusions or depressions from affecting positioning accuracy. In this embodiment, the moving component 4 includes at least one moving post, and the structure of the moving post and the positioning post 21 is identical, and will not be described in detail further.

[0054] Specifically, the measuring component 6 includes a digital dial indicator 61 mounted on the base 1. The movement direction of the measuring end of the digital dial indicator 61 is consistent with the sliding direction of the moving component 4, and the measuring end is correspondingly positioned to the moving component 4 so that the measuring end extends and retracts synchronously with the displacement of the moving component 4. As a mature existing precision measuring tool, the digital dial indicator 61 possesses high measurement accuracy and can meet the basic accuracy requirements for high-precision component slot width detection. This eliminates the need for developing a dedicated measuring structure, reducing design and manufacturing costs.

[0055] Furthermore, the movement direction of the digital dial indicator 61's detection end is consistent with the sliding direction of the moving part 4, and the detection end is correspondingly set to the moving part 4. This ensures that the detection end extends and retracts synchronously with the displacement of the moving part 4, allowing the digital dial indicator 61 to directly and without deviation capture the displacement of the moving part 4. This avoids displacement transmission errors caused by the inconsistency between the detection direction and the movement direction, further ensuring the accuracy of the groove width measurement data. At the same time, the digital dial indicator 61 provides intuitive readings and is easy to operate. Operators can quickly read the measurement results without complex training. Compared with probe scanning or contact measurement processes of professional equipment, it can shorten the detection operation time and meet the efficiency requirements of real-time detection in production stations.

[0056] To further improve testing efficiency, the measuring component 6 also includes a controller, which is electrically connected to the digital dial indicator 61. The controller is configured to receive the displacement data fed back by the digital dial indicator 61 and calculate the actual width of the groove to be measured. Thus, the controller can automatically receive the displacement data fed back by the digital dial indicator 61 and directly calculate the actual width of the groove to be measured based on a preset algorithm (combining the initial relative position parameters of the positioning component 2 and the moving component 4). This eliminates the need for operators to manually read the displacement value of the digital dial indicator 61 and perform manual conversion, completely eliminating the manual conversion step, significantly shortening the operation time for a single test, further improving testing efficiency, and better adapting to the batch testing needs of high-efficiency production scenarios.

[0057] It should be noted that the digital dial indicator 61 converts the displacement of the moving part 4 into an electrical signal. The controller receives this data through the existing electrical signal transmission principle, and, combined with the preset initial relative distance between the positioning part 2 and the moving part 4, automatically calculates the actual width of the groove to be measured based on the existing difference calculation principle. The whole process is implemented using the existing electrical signal transmission and data calculation principle, so it will not be described in detail.

[0058] It is worth noting that the drive component 71 in the pre-adjustment component 7 mentioned above can also be electrically connected to the controller. When it is necessary to calibrate the initial relative distance between the positioning component 2 and the moving component 4, that is, to calibrate the initial reference value for slot width calculation, the controller can output a command to drive the drive component 71 to move the positioning component 2 along the vertical slot width direction until the initial relative distance reaches the preset calibration value. This ensures that the initial reference for slot width calculation is accurate and provides a reliable basis for accurate calculation of each subsequent test.

[0059] Specifically, the base 1 is also equipped with a stop 11, which is located on the side of the moving part 4 away from the positioning part 2, and the stop 11 is correspondingly set to the moving part 4 to limit the maximum sliding stroke of the moving part 4. In this way, by limiting the maximum stroke by the stop 11, the moving part 4 can be prevented from sliding excessively due to external force, which would cause the measuring end of the digital dial indicator 61 to exceed the range and be damaged, thereby protecting the accuracy and service life of the digital dial indicator 61.

[0060] Furthermore, the digital dial indicator 61 is mounted on the stop block 11. The stable mounting base of the stop block 11 on the base 1 ensures the fixed position of the digital dial indicator 61, preventing misalignment between the detection end and the moving part 4 due to loose mounting structure, thus guaranteeing the accuracy of displacement detection. Simultaneously, the fixed relative position of the stop block 11 and the moving part 4 allows the digital dial indicator 61 to be mounted on the stop block 11, enabling more direct alignment of the detection end with the moving part 4, shortening the detection path to reduce transmission errors, and improving the synchronization and accuracy of displacement acquisition.

[0061] In this embodiment, the reset component 5 includes a reset spring 51, one end of which abuts against the base 1, and the other end abuts against the moving component 4. The elastic properties of the spring allow the moving component 4 to slide flexibly in the opposite direction as the groove width changes, adapting to the measurement requirements of different groove width specifications, and maintaining a close fit without additional adjustment. In addition, the installation method of abutting at both ends is simple, and if the spring becomes fatigued or damaged in the future, it can be quickly disassembled and replaced, making maintenance convenient.

[0062] To further improve the accuracy of the test results, the guide component 3 includes a linear guide rail 31 and a base block 32. The linear guide rail 31 is mounted on the base 1 and has a support portion that moves in a direction perpendicular to the width of the groove to be measured. The base block 32 is connected to the support portion, and the moving component 4 is mounted on the base block 32. This configuration ensures that the linear guide rail 31 ensures that the moving component 4 slides along a preset trajectory, avoiding test deviations caused by directional offset. Furthermore, the low-friction characteristics of the linear guide rail 31 reduce the sliding resistance and wear of the moving component 4, ensuring long-term motion accuracy and service life.

[0063] Furthermore, the base block 32, acting as a transitional carrier, can adapt to the connection requirements between the moving part 4 and the standardized linear guide rail 31, improving assembly flexibility while buffering lateral forces to protect the linear guide rail 31. Preferably, the digital dial indicator 61 mentioned above has its detection end abutting against the base block 32. Since the base block 32 is connected to and slides synchronously with the moving part 4, the digital dial indicator 61 can indirectly obtain the displacement of the moving part 4 by detecting the displacement of the base block 32. The base block 32 provides a stable abutting carrier for the detection end of the digital dial indicator 61, avoiding the problem that the moving part 4 cannot directly cooperate with the detection end due to structural limitations. At the same time, it ensures the consistency between the detection end and the direction of movement, further reducing displacement transmission deviation and ensuring the accuracy of the detection data.

[0064] It should be noted that the specific model of the linear guide 31 can be selected according to the actual application scenario, and this embodiment does not make specific requirements or restrictions on it.

[0065] In this embodiment, the reset component 5 also includes a spring post 52. A mounting hole is correspondingly provided on the base block 32, allowing the spring post 52 to pass through the mounting hole. A guide ring groove is formed between the spring post 52 and the mounting hole. The reset spring 51 is sleeved on the spring post 52, and its extension and retraction are guided by the guide ring groove. This guides the reset spring 51 to always extend and retract in a preset direction, preventing the spring from shifting, twisting, or jamming due to uneven force during long-term use. This ensures that the preload applied to the moving component 4 is stable and consistent in direction, thereby guaranteeing the reliability and continuity of the fit between the moving component 4 and the inner wall of the groove to be measured.

[0066] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A slot width measuring fixture, characterized in that, The slot width measuring fixture includes a base (1), a positioning component (2), a guide component (3), a moving component (4), a resetting component (5), and a measuring component (6), wherein: The positioning element (2) is disposed on the base (1) and is used to abut against an inner wall of the groove to be measured; The guide (3) is disposed on the base (1); The moving part (4) is slidably engaged with the guide part (3), and the moving part (4) is used to abut against the other opposite inner wall of the groove to be measured. The moving part (4) can be displaced in a direction perpendicular to the width of the groove to be measured, so that the moving part (4) slides as the distance between the groove walls changes. The reset member (5) is disposed on the base (1) and is configured to apply a preload force toward the other inner wall of the groove to be measured to the moving member (4) and is configured to allow the moving member (4) to slide in the opposite direction due to the change in groove width; The measuring element (6) is configured to detect the amount of displacement generated when the moving element (4) abuts against the groove wall.

2. The slot width measuring fixture according to claim 1, characterized in that, The slot width measuring fixture also includes a pre-adjustment component (7) disposed between the base (1) and the positioning member (2). The pre-adjustment component (7) is configured to drive the positioning member (2) to move in a direction perpendicular to the slot width to be measured, so as to adjust the position of the positioning member (2) relative to the base (1).

3. The slot width measuring fixture according to claim 2, characterized in that, The pre-adjustment component (7) includes a drive member (71) and a connector (72). The drive member (71) is disposed on the base (1). The connector (72) is connected between the output end of the drive member (71) and the positioning member (2). The drive member (71) can drive the connector (72) to move in a direction perpendicular to the width of the groove to be measured, so as to adjust the position of the positioning member (2) relative to the base (1).

4. The slot width measuring fixture according to claim 1, characterized in that, The positioning element (2) includes at least two positioning posts (21) spaced apart, the axes of each positioning post (21) are parallel to each other, and each positioning post (21) is used to abut against the same inner wall of the groove to be measured.

5. A groove width measuring fixture according to claim 1, characterized in that, The measuring component (6) includes a digital dial indicator (61) mounted on the base (1). The movement direction of the detection end of the digital dial indicator (61) is consistent with the sliding direction of the moving component (4), and the detection end is correspondingly arranged with the moving component (4) so ​​that the detection end extends and retracts synchronously with the displacement of the moving component (4).

6. A slot width measuring fixture according to claim 5, characterized in that, The base (1) is also provided with a stop (11), which is located on the side of the moving part (4) away from the positioning part (2), and the stop (11) is correspondingly provided with the moving part (4) to limit the maximum sliding stroke of the moving part (4).

7. A slot width measuring fixture according to claim 6, characterized in that, The digital dial indicator (61) is mounted on the stop block (11).

8. A slot width measuring fixture according to claim 5, characterized in that, The measuring device (6) also includes a controller, which is electrically connected to the digital dial indicator (61). The controller is configured to receive displacement data fed back by the digital dial indicator (61) and calculate the actual width data of the groove to be measured.

9. A slot width measuring fixture according to claim 1, characterized in that, The reset component (5) includes a reset spring (51), one end of which abuts against the base (1) and the other end of which abuts against the moving component (4).

10. A slot width measuring fixture according to claim 7, characterized in that, The guide (3) includes a linear guide (31) and a base (32). The linear guide (31) is disposed on the base (1). The linear guide (31) has a bearing portion that moves in a direction perpendicular to the width of the groove to be measured. The base (32) is connected to the bearing portion. The moving part (4) is disposed on the base (32).

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