Measuring device for U-shaped shell

Abstract

The invention relates to the technical field of hole site measuring tool equipment, and discloses a measuring device for a U-shaped shell. The measuring device comprises a plurality of groups of measuring units and a center distance measuring assembly. The measuring unit comprises a fixing assembly and a measuring assembly, wherein the fixing assembly comprises a claw which extends into and is fixed in a U shell punched hole; the knob assembly is in transmission connection with the claw to drive the claw to open and close; the shell assembly is provided with a sliding groove. The side surface measuring assembly comprises a distance measuring sensor and a blocking needle installed in the sliding groove. The distance measuring sensor is used for detecting the displacement amount of the blocking needle. The display device is used for displaying the displacement amount of the blocking needle. The center distance measuring assembly comprises a scale plate which is rotatably connected to a group of measuring units; the scale plate is rotationally connected to the other group of measuring units, the scale plate is in sliding connection with the scale plate, and the scale plate and the scale plate are correspondingly provided with length scales. By means of the arrangement, synchronous, rapid and direct measurement of the edge distance, the center distance and the included angle of the hole site is achieved, and the multi-dimensional size of the punching position is accurately obtained at the same time.

Description

Technical Field

[0001] This application relates to the field of hole position measuring tools and equipment, for example, to a measuring device for a U-shaped shell. Background Technology

[0002] The U-shell is a key sheet metal component in the refrigerator's body structure, and the position of the reinforcing iron punch holes on it directly affects the installation accuracy of the refrigerator door hinges and the overall assembly quality. The distance from the punch hole to the side of the U-shell, the center distance between the punch holes on both sides, and their relative angle are crucial dimensions to ensure correct hinge positioning, smooth opening and closing of the refrigerator door, and a tight seal.

[0003] In related technologies, a common measurement method involves operators using calipers to directly measure the straight-line distance from the edge of the punched hole to the side of the U-shell. This method relies on manual alignment and reading, and is affected by the R-angle structure of the U-shell's bending area. The selection of the measurement reference is subject to subjective bias, making it difficult to accurately reflect the true distance from the hole center to the actual assembly reference surface. Furthermore, there is a lack of integrated, rapid measurement tools for the center distance and relative angle between the punched holes on both sides. Multiple positioning, separate measurements, and indirect calculations are usually required, resulting in low measurement efficiency, poor consistency, and an inability to meet the inspection needs of refrigerator U-shells of different widths.

[0004] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art: In related technologies, existing measurement methods rely on manual operation and general measuring tools, making it difficult to quickly and accurately obtain multi-dimensional dimensions of the punching position simultaneously.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0006] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0007] This disclosure provides a measuring device for a U-shaped shell. By integrating positioning, reference identification, and multi-parameter measurement functions into a coordinated device, it enables simultaneous, rapid, and direct measurement of hole edge distance, center distance, and included angle, so as to accurately obtain the multi-dimensional dimensions of the punching position at the same time.

[0008] This disclosure provides a measuring device for a U-shaped shell, comprising multiple measuring units and a center distance measuring assembly connected among the multiple measuring units. Each measuring unit includes a fixing assembly, a knob assembly, a housing assembly, a side measuring assembly, and a display device. The fixing assembly includes a hook for extending into and fixing within a punched hole in the U-shaped shell; the knob assembly is kinetically connected to the hook to drive the hook to open and close; the housing assembly is provided with a sliding groove; the side measuring assembly includes a distance sensor and a stop pin mounted in the sliding groove, the stop pin being positioned corresponding to the edge of the U-shaped shell, the distance sensor detecting the position coordinates of the stop pin, and converting the position coordinates into the displacement of the stop pin based on preset reference parameters; the display device is electrically connected to the side measuring assembly and displays the displacement of the stop pin. The center distance measuring assembly includes a scale plate and a ruler plate. The scale plate is rotatably connected to one set of measuring units; the ruler plate is rotatably connected to another set of measuring units, the ruler plate and the scale plate are slidably connected, and the scale plate and ruler plate are correspondingly provided with length graduations. The housing assembly is provided with angle graduations that cooperate with the scale plate and / or the ruler plate.

[0009] In some embodiments, the fixing assembly includes a plurality of hooks. The fixing assembly further includes a lead screw shaft and a drive gear. The lead screw shaft is provided with a threaded section, which respectively engages with the plurality of hooks; the drive gear is fixedly connected to the lead screw shaft and is drively connected to the knob assembly.

[0010] In some embodiments, the knob assembly includes a handle, a gear shaft, and a transmission gear disposed on the gear shaft; wherein the transmission gear meshes with a drive gear.

[0011] In some embodiments, the housing assembly includes an upper cover and a lower cover, a gear shaft is supported between the upper cover and the lower cover by bearings, and a lead screw shaft is supported on the lower cover by bearings.

[0012] In some embodiments, a slide is formed on the lower cover; an angle scale is provided on the upper cover.

[0013] In some embodiments, the side measurement assembly further includes an elastic element. The elastic element is connected between the stop pin and the housing assembly to give the stop pin a tendency to move toward the edge of the U-shaped housing.

[0014] In some embodiments, the edge of the slide is provided with a displacement scale, and the displacement scale line is provided corresponding to the stop pin, so as to indicate the displacement value of the stop pin relative to the housing assembly through the displacement scale line.

[0015] In some embodiments, the scale plate and the ruler plate are slidably connected by a dovetail groove structure; or, the scale plate and the ruler plate are slidably connected by a slide rail structure.

[0016] In some embodiments, the length scale includes a first scale area for reading the biaxial center distance and a second scale area for reading the uniaxial center distance.

[0017] In some embodiments, the claw is provided with an anti-slip layer at the edge of the punch to prevent the claw from detaching from the inner wall of the punch.

[0018] The measuring device for a U-shaped shell provided in this disclosure can achieve the following technical effects: This disclosure provides a measuring device for a U-shaped shell, comprising multiple measuring units and a center distance measuring assembly connected among the multiple measuring units. Each measuring unit includes a fixing assembly, a knob assembly, a housing assembly, a side measuring assembly, and a display device. The fixing assembly includes a hook for extending into and fixing within a punched hole in the U-shaped shell; the knob assembly is kinetically connected to the hook to drive the hook to open and close; the housing assembly is provided with a sliding groove; the side measuring assembly includes a distance sensor and a stop pin mounted in the sliding groove, the stop pin being positioned corresponding to the edge of the U-shaped shell, the distance sensor detecting the position coordinates of the stop pin, and converting the position coordinates into the displacement of the stop pin based on preset reference parameters; the display device is electrically connected to the side measuring assembly and displays the displacement of the stop pin. The center distance measuring assembly includes a scale plate and a ruler plate. The scale plate is rotatably connected to one set of measuring units; the ruler plate is rotatably connected to another set of measuring units, the ruler plate and the scale plate are slidably connected, and the scale plate and ruler plate are correspondingly provided with length graduations. The housing assembly is provided with angle graduations that cooperate with the scale plate and / or the ruler plate. In this way, when measuring punching holes, the claws of the two measuring units can be aligned with and placed into the two punching holes to be measured on the U-shell in the retracted state. Then, the knob assembly is operated to drive the claws to open and tighten them from the inside, fixing them in place within the punching holes. Simultaneously, the stop pin of the side measuring assembly abuts against the actual side of the U-shell bend under the action of the elastic reset component. After fixing, based on the displacement of the stop pin detected by the distance sensor, the distance from the center of each punching hole to the corresponding actual side of the U-shell is obtained. The length scale corresponding to the relative position of the scale plate and graduation plate on the center distance measuring assembly is read to obtain the center distance between the two punching holes. The angle between the angle scale on the shell assembly and the center distance measuring assembly is read to obtain the included angle of the line connecting the two punching holes. This setup, by integrating positioning, reference identification, and multi-parameter measurement functions into a coordinated working device, achieves synchronous, rapid, and direct measurement of hole edge distance, center distance, and included angle, accurately obtaining the multi-dimensional dimensions of the punching hole position simultaneously.

[0019] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0020] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein: Figure 1This is a schematic diagram of the structure of a measuring device provided in an embodiment of this disclosure; Figure 2 This is a schematic diagram of the structure of a measurement unit provided in an embodiment of this disclosure; Figure 3 This is a schematic diagram of the structure of a fixed component provided in an embodiment of this disclosure; Figure 4 This is a schematic diagram of the structure of a knob assembly provided in an embodiment of this disclosure; Figure 5 This is a schematic diagram of the structure of a housing assembly provided in an embodiment of this disclosure; Figure 6 yes Figure 5 A magnified view of the local structure; Figure 7 This is a schematic diagram of the structure of a center distance measuring component provided in an embodiment of this disclosure.

[0021] Figure label: 11: Measurement unit; 12: Center distance measurement component; 121: Scale plate; 1211: First scale area; 1212: Second scale area; 122: Ruler plate; 20: Fixed component; 21: Claw; 22: Lead screw shaft; 23: Drive gear; 30: Knob assembly; 31: Handle; 32: Gear shaft; 33: Transmission gear; 40: Housing assembly; 41: Top cover; 411: Angle scale; 42: Bottom cover; 421: Slide groove; 43: Base; 50: Side measurement component; 51: Distance sensor; 52: Stop pin; 53: Elastic element. Detailed Implementation

[0022] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0023] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0024] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better describing the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this disclosure according to the specific circumstances.

[0025] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0026] Unless otherwise stated, the term "multiple" means two or more.

[0027] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0028] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0030] like Figures 1 to 7 As shown, this disclosure provides a measuring device for a U-shaped shell. By integrating positioning, reference identification, and multi-parameter measurement functions into a coordinated device, it achieves synchronous, rapid, and direct measurement of hole edge distance, center distance, and included angle, so as to accurately obtain the multi-dimensional dimensions of the punching position at the same time.

[0031] like Figures 1 to 7As shown, this embodiment of the present disclosure provides a measuring device for a U-shaped shell, including multiple sets of measuring units 11 and a center distance measuring assembly 12 connected among the multiple sets of measuring units 11. The measuring unit 11 includes: a fixing assembly 20, a knob assembly 30, a shell assembly 40, a side measuring assembly 50, and a display device. The fixing assembly 20 includes a hook 21 for extending into and fixing within a punched hole in the U-shaped shell; the knob assembly 30 is kinetically connected to the hook 21 to drive the hook 21 to open and close; the shell assembly 40 is provided with a sliding groove 421; the side measuring assembly 50 includes a distance sensor 51 and a stop pin 52 mounted in the sliding groove 421, the stop pin 52 being disposed corresponding to the edge of the U-shaped shell, the distance sensor 51 for detecting the position coordinates of the stop pin 52, and converting the position coordinates into the displacement of the stop pin based on preset reference parameters; the display device is electrically connected to the side measuring assembly 50 for displaying the displacement of the stop pin 52. The center distance measuring assembly 12 includes: a scale plate 121 and a ruler plate 122. The scale plate 121 is rotatably connected to a set of measuring units 11; the ruler plate 122 is rotatably connected to another set of measuring units 11, and the ruler plate 122 is slidably connected to the scale plate 121. The scale plate 121 and the ruler plate 122 are respectively provided with length graduations. The housing assembly 40 is provided with angle graduations 411 that cooperate with the scale plate 121 and / or the ruler plate 122.

[0032] Specifically, the fixing component 20 is equipped with a hook 21, which is used to directly extend into the punched hole of the U-shell and tighten within the hole through its own opening and closing action, thereby achieving reliable fixation between the measuring unit 11 and the U-shell. The knob component 30 is connected to the hook 21 via mechanical transmission. When the operator rotates the knob, the generated power is transmitted to the hook 21 to drive it to perform an opening or closing action. The side measuring component 50 includes a stop pin 52 and a distance sensor 51. The stop pin 52 is directly installed in the slide groove 421 of the housing component 40 and can slide along the slide groove 421. During measurement, the position of the stop pin 52 corresponds to the edge of the U-shell. The measuring unit 11 also includes a processing module, which is electrically connected to the distance sensor 51. Before the measurement begins, the distance sensor 51 first records the initial position coordinates of the stop pin 52 in its naturally extended state or at a specific reference position, and sends these initial position coordinates to the processing module. When the measuring unit 11 is fixed to the punch and the stop pin 52 abuts against the edge of the U-shell, the distance sensor 51 reads the current position coordinates of the stop pin 52 relative to the sensor reference point in this state and sends the current position coordinates to the processing module. At this time, the processing module compares the difference between the current position coordinates and the initial position coordinates, and obtains the actual displacement of the stop pin 52 through subtraction or coordinate transformation formula. This displacement directly reflects the distance from the punch to the edge of the U-shell. After obtaining the displacement of the stop pin 52, the processing module generates a corresponding electrical signal and transmits this signal to the display device in real time. The display device receives and processes the electrical signal. Its internal circuitry or processor converts the original signal representing the displacement into a value representing the actual distance from the center of the punch to the edge of the U-shell through a preset algorithm or conversion relationship, such as according to sensor characteristics and mechanical structure parameters. Subsequently, this value is continuously displayed digitally on the screen of the display device. The center distance measuring component 12 is used to measure the distance relationship between the punches corresponding to different measuring units 11. The center distance measuring component 12 consists of a scale plate 121 and a ruler plate 122. One end of the scale plate 121 is rotatably connected to the housing of a set of measuring units 11, while the ruler plate 122 is similarly rotatably connected to the housing of another set of measuring units 11. The ruler plate 122 and the scale plate 121 are slidably connected and can extend and retract to accommodate different spacings. Scales for reading length are correspondingly engraved on the scale plate 121 and the ruler plate 122. Furthermore, an angle scale 411 is provided on the housing assembly 40. The angle scale 411 can be used in conjunction with the scale plate 121 or the ruler plate 122 in the center distance measuring assembly 12. When the measuring unit 11 rotates as the angle of the U-shaped housing punch changes, the installation angle information of the punch can be obtained by reading the value on the angle scale 411.Specifically, when measuring the punching, the hooks 21 of the two measuring units 11, in their retracted state, are aligned and placed into the two punches to be measured on the U-shell. Then, the knob assembly 30 is operated to drive the hooks 21 to open and tighten them from the inside, while the stop pin 52 of the side measuring assembly 50 abuts against the actual side of the U-shell at the bend under the action of the elastic reset member. After fixing, based on the displacement of the stop pin 52 detected by the distance sensor 51, the distance from the center of each punch to the corresponding actual side of the U-shell is obtained. The length scale corresponding to the relative position of the scale plate 122 and the scale plate 121 on the center distance measuring assembly 12 is read to obtain the center distance between the two punches. The angle between the angle scale 411 on the shell assembly 40 and the center distance measuring assembly 12 is read to obtain the included angle of the line connecting the two punches. This setup integrates positioning, reference identification, and multi-parameter measurement functions into a single, coordinated device, enabling simultaneous, rapid, and direct measurement of hole edge distance, center distance, and included angle, thereby accurately obtaining multi-dimensional dimensions of the punching position simultaneously.

[0033] In the above embodiments, the initial position coordinates of the stop pin 52 recorded by the ranging sensor 51 in its naturally extended state or at a specific reference position can be set according to the user's actual needs. For example, when the measuring unit is not inserted into the U-shaped hole, and the stop pin 52 is at its naturally extended limit position under the action of the elastic member 53, its coordinates at this time are recorded as the initial value; or, the coordinates can be calculated based on the geometric center of the fixing component 20 of the measuring unit, i.e., the theoretical center point after the hook opens. In addition, the user can also determine its initial position coordinates by zeroing the stop pin 52; and the user can accurately convert position information into displacement by zeroing the calibration before measurement.

[0034] In some practical applications, the measuring device includes two measuring units 11 and a center distance measuring component 12 connecting the two. The two measuring units 11 are arranged symmetrically from left to right, and are used to engage and measure the punched holes on the left and right sides of the U-shaped shell, respectively. The operator first operates the knob assembly 30 on the two measuring units 11 to drive the hook 21 of the fixing component 20 in each measuring unit 11 to a closed state. Then, the closed hook 21 of the left measuring unit 11 is placed into the punched hole on the left side of the U-shaped shell, and the closed hook 21 of the right measuring unit 11 is placed into the punched hole on the right side of the U-shaped shell. Next, the operator operates the knob assembly 30 again to drive the hook 21 to open, so that it contacts and fixes the inner wall of the punched hole, thereby anchoring the two measuring units 11 to the U-shaped shell. During this process, the stop pin 52 of the side measuring component 50 of each measuring unit 11 is installed in the slide groove 421 of the shell assembly 40, and its position corresponds to the edge of the U-shaped shell. When the measuring unit 11 is fixed in place, the stop pin 52 slides due to contact with the edge of the U-shaped shell. The distance sensor 51 associated with the stop pin 52 then detects and records the displacement of the stop pin 52. After the measuring units 11 on both sides are fixed, the center distance measuring assembly 12 unfolds. The scale plate 121 of this assembly is rotatably connected to the housing assembly 40 of the left measuring unit 11, and the ruler plate 122 is rotatably connected to the housing assembly 40 of the right measuring unit 11. The ruler plate 122 and the scale plate 121 are slidably connected and can extend and retract relative to each other. The operator can directly read the length scale reading of the ruler plate 122 relative to the scale plate 121, which is the center distance between the two punches. At the same time, since the housing assembly 40 is provided with an angle scale 411, the relative angle between the two punches can be read by observing the position of the scale plate 121 or the ruler plate 122 rotatably connected to the housing relative to the angle scale 411.

[0035] like Figure 3 As shown, in some embodiments, the fixing component 20 includes a plurality of hooks 21. The fixing component 20 also includes a lead screw 22 and a drive gear 23. The lead screw 22 is provided with a threaded section, which respectively engages with the plurality of hooks 21; the drive gear 23 is fixedly connected to the lead screw 22 and is drively connected to the knob assembly 30.

[0036] Specifically, the fixing component 20 includes two claws 21, which move synchronously and in opposite directions via a common drive mechanism. The drive mechanism includes a lead screw 22 with threaded sections, and the two claws 21 engage with different sections of the lead screw 22 through their internal threaded holes, with the threads in these two engaging sections rotating in opposite directions. The fixing component 20 also includes a drive gear 23, which is fixedly connected to the lead screw 22, allowing the rotation of the drive gear 23 to synchronously drive the lead screw 22. When the knob assembly 30 is operated, the rotational power it generates is transmitted to the drive gear 23. The drive gear 23 then rotates, driving the lead screw 22 to rotate. Because the two claws 21 engage with the oppositely rotating threaded sections, the rotation of the lead screw 22 is converted into linear motion of the two claws 21 along the axial direction of the lead screw 22, either towards or away from each other. With this configuration, the opening and closing of the two claws 21 can be controlled synchronously by a single knob operation, thereby ensuring that the fixing component 20 can be stably and centeredly inserted into the U-shaped hole and reliably tensioned and fixed, providing a solid reference for subsequent accurate measurements.

[0037] like Figure 4 As shown, in some embodiments, the knob assembly 30 includes a handle 31, a gear shaft 32, and a transmission gear 33 disposed on the gear shaft 32; wherein the transmission gear 33 meshes with the drive gear 23.

[0038] Specifically, one end of the gear shaft 32 or at an appropriate position is fixedly connected to the handle 31, so that the operator's rotation of the handle 31 can be directly converted into the rotational motion of the gear shaft 32. The transmission gear 33 meshes with the drive gear 23. When the operator rotates the handle 31, the handle 31 drives the shaft of the gear 23 to rotate, the gear shaft 32 drives the transmission gear 33 on it to rotate, the transmission gear 33 then meshes with and drives the drive gear 23 on the fixed assembly 20 to rotate, and finally drives the lead screw shaft 22, which is coaxially fixed with the drive gear 23, to rotate, and controls the two hooks 21 to complete synchronous linear opening and closing motion.

[0039] like Figures 2 to 5 As shown, in some embodiments, the housing assembly 40 includes an upper cover 41 and a lower cover 42, the gear shaft 32 is supported between the upper cover 41 and the lower cover 42 by bearings, and the lead screw shaft 22 is supported on the lower cover 42 by bearings.

[0040] Specifically, the upper cover 41 and the lower cover 42 are fixedly connected by means such as screws and clips, forming a stable support and protection structure. The gear shaft 32 is supported by bearings. Specifically, both ends of the gear shaft 32 are mounted and supported between the upper cover 41 and the lower cover 42 by bearings, ensuring that the gear shaft 32 can maintain smooth and stable rotation while bearing operating torque, and effectively reducing friction and shaking, thereby transmitting the rotation operation of the handle 31 to the transmission gear 33 more accurately. The lower cover 42 is provided with a base 43, and the lead screw shaft 22 is rotatably mounted on the base 43 via a rotating shaft. The base 43 is provided with a limiting groove, the extension direction of which is parallel to the lead screw shaft 22, and the hook 21 is at least partially located in the limiting groove to prevent the hook 21 from rotating, thereby ensuring that the hook 21 moves along the length direction of the lead screw shaft 22.

[0041] like Figures 2 to 6 As shown, in some embodiments, a groove 421 is formed on the lower cover 42; an angle scale 411 is provided on the upper cover 41.

[0042] Specifically, a groove 421 is formed on the lower cover 42 of the housing assembly 40, so that the opening of the groove 421 directly faces and is close to the edge of the U-shell to be measured. When the measuring unit 11 is fixed to the punch by the hook 21, the stop pin 52 installed in the groove 421 can be squeezed by the edge of the U-shell along the most direct path, thereby ensuring that the reference line for displacement detection is consistent with the actual assembly reference surface, reducing measurement errors caused by structural gaps or misaligned installation. Angle scale 411 is set on the surface of the upper cover 41 of the housing assembly 40. The upper cover 41 is the main visible surface when the operator looks down at the measuring device, and setting the angle scale 411 here facilitates direct observation. When the scale plate 121 or the ruler plate 122 of the center distance measuring component 12 rotates relative to the housing, the relative positional relationship between its edge or specific marking line and the angle scale 411 of the upper cover 41 is clearly visible. The operator can read the center distance length and the relative angle simultaneously without changing the viewing angle, optimizing human-machine interaction and reading efficiency.

[0043] like Figure 6 As shown, in some embodiments, the side measurement assembly 50 further includes an elastic element 53. The elastic element 53 is connected between the stop pin 52 and the housing assembly 40 to give the stop pin 52 a tendency to move toward the edge of the U-shaped housing.

[0044] Specifically, the elastic element 53 is directly connected between the slidable stop pin 52 and the housing assembly 40, for example, between the stop pin 52 and the lower cover 42. The elastic element 53 applies a continuous tendency force to the stop pin 52, ensuring that the stop pin 52 always tends to move outwards from the edge of the U-shell in its natural state. This means that when the measuring unit 11 is not in contact with the U-shell being measured, the stop pin 52 automatically slides to its initial position inside the groove 421 under the action of the elastic element 53. When the operator fixes the measuring unit 11 to the punch hole, as the housing assembly 40 approaches the side of the U-shell, the protruding end of the stop pin 52 will first contact the edge of the U-shell. During further advancement or final fixation, the edge of the U-shell will apply a reverse force to the stop pin 52, resisting the tendency force of the elastic element 53, forcing the stop pin 52 to slide outwards from the housing along the groove 421.

[0045] In some embodiments, the edge of the slide groove 421 is provided with a displacement scale, and the displacement scale line is provided corresponding to the stop pin 52 so as to indicate the displacement value of the stop pin 52 relative to the housing assembly 40 through the displacement scale line.

[0046] Specifically, on the housing assembly 40 of the measuring unit 11, for example, along the length of the slide groove 421 opened in the lower cover 42, a set of linearly arranged displacement scale lines are integrated, and the stop pin 52 is provided with an indicator portion that cooperates with the displacement scale lines. The scale interval of the displacement scale lines is matched with the measurement range and accuracy of the ranging sensor 51 to establish a mapping relationship between the physical displacement of the stop pin 52 and the scale indication. When the stop pin 52 is pushed by the edge of the U-shaped housing and displaced within the slide groove 421, the indicator portion of the stop pin 52 moves synchronously above or to the side of the displacement scale line. At this time, the scale indication value pointed to by the stop pin 52 represents the actual physical displacement of the stop pin 52 relative to the housing assembly 40. This displacement scale line constitutes a physical indication path parallel to the electronic measurement system. When the electronic display system is unavailable due to environmental factors, this mechanical indicating structure can still maintain the basic indication function of the device for the displacement amount.

[0047] In some embodiments, the scale plate 121 and the ruler plate 122 are slidably connected by a dovetail groove structure; or, the scale plate 121 and the ruler plate 122 are slidably connected by a slide rail structure.

[0048] Specifically, if the scale plate 121 and the ruler plate 122 are slidably connected via a dovetail groove structure, a raised guide rail with a trapezoidal cross-section, i.e., a dovetail tenon, can be machined on the surface of one of the scale plate 121 and the ruler plate 122; while a groove matching the shape of the dovetail tenon, i.e., a dovetail groove, can be machined on the corresponding surface of the other. When the raised guide rail is embedded in the groove, the two form a mechanical interlock on a plane perpendicular to the sliding direction, which can effectively prevent the components from being accidentally lifted or separated during the measurement process, ensuring a smooth and wobbly sliding process, thereby ensuring a stable and reliable center distance reading. If the scale plate 121 and the ruler plate 122 are slidably connected via a slide rail structure, an independent cylindrical or rectangular guide rail with a smooth surface can be set between the scale plate 121 and the ruler plate 122, and a corresponding slider or linear bearing can be used. By moving the slider or bearing on the guide rail, low-friction, high-precision linear relative displacement between the two can be achieved, providing a smoother operating feel, and manufacturing and assembly can be simplified by selecting standard parts.

[0049] like Figure 7 As shown, in some embodiments, the length scale includes a first scale area 1211 for reading the center distance of two axes and a second scale area 1212 for reading the center distance of a single axis.

[0050] Specifically, the first scale area 1211 and the second scale area 1212 are positioned opposite each other on both sides of the scale plate 121 or the ruler plate 122. The dual-axis center distance refers to the projected center distance of two punches in a primary direction, such as the width direction of a refrigerator. The scale values, graduations, and zero-point calibration of this scale area are optimized for this specific measurement mode, enabling the operator to directly, quickly, and unambiguously read the results when measuring the most common center distance parameters. The single-axis center distance refers to the measurement of the punch's deviation or distance in another direction, such as perpendicular to the primary direction, or when simplifying measurements for certain models. In this area, the scale system is independent of the first scale area 1211, and its range, accuracy, and reference point may be specifically set according to the characteristics of single-axis measurement. This configuration allows the measuring device to flexibly adapt to a wider range of measurement tasks and product specifications without requiring complex conversions or the use of additional tools by the operator.

[0051] In some embodiments, the hook 21 is provided with an anti-slip layer at the edge of the punch to prevent the hook 21 from detaching from the inner wall of the punch.

[0052] Specifically, an anti-slip layer is provided on the outer surface or stress area of ​​the hook 21 that contacts the inner wall of the U-shaped perforation and generates tension. The anti-slip layer is made of a material with a high coefficient of friction, such as rubber, polyurethane, or a metal layer that has undergone surface knurling or sandblasting. This anti-slip layer significantly increases the static friction between the surface of the hook 21 and the inner metal wall of the perforation when the hook 21 is opened by the knob assembly 30 and pressed against the inner wall of the perforation. This configuration effectively resists radial slippage or circumferential rotation of the hook 21 within the perforation when the measuring device is fixed to the U-shaped perforation and subsequent contact with the stop pin 52, reading, or minor adjustments are performed. This ensures that the relative position between the fixing assembly 20 and the U-shaped perforation remains absolutely fixed throughout the entire measurement cycle, thereby elevating the stability of the measurement reference from the structural level to the tribological level, further eliminating measurement errors introduced by minor movements of the fixed point, and enhancing the reliability and repeatability of the measurement results.

[0053] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A measuring device for a U-shaped shell, characterized in that, It includes multiple sets of measuring units (11) and a center distance measuring assembly (12) connected between the multiple sets of measuring units (11); The measuring unit (11) includes: The fixing component (20) includes a hook (21) for extending into and fixing within the U-shaped perforation; The knob assembly (30) is connected to the hook (21) to drive the hook (21) to open and close; The housing assembly (40) is provided with a sliding groove (421); The side measurement assembly (50) includes a distance sensor (51) and a stop pin (52) mounted on the slide (421). The stop pin (52) is set corresponding to the edge of the U-shell. The distance sensor (51) is used to detect the position coordinates of the stop pin (52) and convert the position coordinates into the displacement of the stop pin (52) based on preset reference parameters. The display device is electrically connected to the side measuring assembly (50) and is used to display the displacement of the stop pin (52); The center distance measuring component (12) includes: A scale plate (121) is rotatably connected to a set of the measuring units (11); A scale plate (122) is rotatably connected to another set of the measuring units (11). The scale plate (122) is slidably connected to the scale plate (121), and the scale plate (121) and the scale plate (122) are respectively provided with length scales. The housing assembly (40) is provided with angle scales (411) that cooperate with the scale plate (121) and / or the ruler plate (122).

2. The measuring device according to claim 1, characterized in that, The fixing component (20) includes a plurality of hooks (21); The fixing component (20) also includes: The lead screw shaft (22) is provided with a threaded section, which respectively engages with a plurality of the hooks (21); The drive gear (23) is fixedly connected to the lead screw shaft (22) and is connected to the knob assembly (30) in a transmission manner.

3. The measuring device according to claim 2, characterized in that, The knob assembly (30) includes a handle (31), a gear shaft (32), and a transmission gear (33) disposed on the gear shaft (32); The transmission gear (33) meshes with the drive gear (23).

4. The measuring device according to claim 3, characterized in that, The housing assembly (40) includes an upper cover (41) and a lower cover (42), the gear shaft (32) is supported between the upper cover (41) and the lower cover (42) by bearings, and the lead screw shaft (22) is supported on the lower cover (42) by bearings.

5. The measuring device according to claim 4, characterized in that, The groove (421) is formed in the lower cover (42); and, The angle scale (411) is provided on the upper cover (41).

6. The measuring device according to claim 1, characterized in that, The side measurement assembly (50) also includes: An elastic element (53) is connected between the stop pin (52) and the housing assembly (40) to give the stop pin (52) a tendency to move toward the edge of the U-shell.

7. The measuring device according to claim 1, characterized in that, The edge of the slide (421) is provided with a displacement scale, and the displacement scale line is provided corresponding to the stop pin (52) so as to indicate the displacement value of the stop pin (52) relative to the housing assembly (40) through the displacement scale line.

8. The measuring device according to claim 1, characterized in that, The scale plate (121) and the ruler plate (122) are slidably connected by a dovetail groove structure; or, The scale plate (121) and the ruler plate (122) are slidably connected by a slide rail structure.

9. The measuring device according to claim 1, characterized in that, The length scale includes a first scale area (1211) for reading the center distance of two axes and a second scale area (1212) for reading the center distance of one axis.

10. The measuring device according to any one of claims 1 to 9, characterized in that, The hook (21) is provided with an anti-slip layer at the edge of the punch to prevent the hook (21) from detaching from the inner wall of the punch.

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