Hanging relative size measuring device and product assembly method

Abstract

The present application relates to size detection technical field, specifically disclose hanging type relative size measuring device and product assembly method. The device includes a hanging assembly and a measuring mechanism; the measuring mechanism is hung on the hanging assembly through the connecting rope, the measuring mechanism can move in space relative to the hanging assembly, the measuring mechanism selectively fixes the product, the measuring mechanism includes a mechanism bearing frame, a measuring body and a plurality of measuring datum blocks provided on the mechanism bearing frame, the measuring datum blocks are used for contacting with the datum surface, the measuring body includes a movable body, a compensation pad, a rolling ball and a plurality of displacement sensors, the movable body can move along the vertical direction relative to the mechanism bearing frame and is elastically connected to the mechanism bearing frame, the top of the compensation pad and the bottom of the movable body are relatively swung through the rolling ball, the bottom of the compensation pad is used for contacting the assembly surface, and the measuring end of the displacement sensor is pressed on the top of the compensation pad. The device measures the product by hanging, improves the measurement flexibility and efficiency.

Description

Technical Field

[0001] This invention relates to the field of dimensional inspection technology, and in particular to a suspended relative dimension measuring device and a product assembly method. Background Technology

[0002] In the automotive manufacturing industry, especially in the assembly process of heavy components, it is often necessary to accurately measure the relative dimensions of specific assembly surfaces on the assembly to ensure assembly precision and quality. The core purpose of such measurements is to obtain the height or distance deviation of the assembly surface relative to a fixed reference surface on the product, so as to accurately select shims of appropriate thickness for assembly error compensation, thereby achieving a good fit between components.

[0003] Currently, the most common measurement solution used in the industry is fixed precision measuring equipment. This equipment is typically fixedly installed on a ground base next to the product flow line. When a product flows through the measuring station via the conveyor line, it must first undergo precise secondary positioning to ensure it stops stably at the preset measuring position. Subsequently, the fixed measuring equipment performs contact or non-contact measurements on the reference surface and assembly surface of the product. After data acquisition, the product can leave the station to continue the subsequent process.

[0004] While this fixed measurement solution met basic measurement needs for a certain period, its inherent technical limitations have become increasingly apparent as automotive manufacturing production lines continue to evolve towards greater flexibility, compactness, and efficiency. First, fixed measurement equipment is typically bulky and occupies a significant area. In modern production line layouts where space resources are increasingly scarce, this not only increases the space costs of line construction but also limits the flexibility of line layout. Second, this solution places extremely high demands on the positioning accuracy of products transported to the measurement station, often requiring additional precision positioning mechanisms. This increases system complexity and cost, and also extends the production cycle time due to the secondary positioning process, hindering further improvements in overall efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a suspended relative dimension measuring device and a product assembly method to solve the problems of limited measuring space and complex overall structure.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A suspended relative dimension measuring device is used to measure the assembly surface of a product. The product also has a reference surface fixed in position relative to the assembly surface. The suspended relative dimension measuring device includes a suspension assembly and a measuring mechanism. The measuring mechanism is suspended from the suspension assembly by a connecting rope. The measuring mechanism can move in space relative to the suspension assembly. The measuring mechanism selectively fixes the product. The measuring mechanism includes a support frame, a measuring body and multiple measuring reference pads disposed on the support frame. The measuring reference pads are used to contact the reference surface. The measuring body includes a movable body, a compensation pad, a ball bearing, and multiple displacement sensors. The movable body can move vertically relative to the support frame and is elastically connected to the support frame. The top of the compensation pad and the bottom of the movable body swing relative to each other via the ball bearing. The bottom of the compensation pad is used to contact the assembly surface. The displacement sensors are disposed on the movable body, and the measuring end of the displacement sensor presses against the top of the compensation pad.

[0008] As an optional technical solution for the suspended relative size measuring device, the bottom of the measuring reference pad has a contact surface for fitting against the reference surface. An air port is provided on the reference surface, and an airflow channel is provided inside the measuring reference pad. An air pipe connector is inserted into the measuring reference pad, and the air pipe connector is connected to the air port through the airflow channel. The air pipe connector is used to connect to an external pressure detection sensor.

[0009] As an optional technical solution for a suspended relative size measuring device, the reference surface is provided with a first positioning unit, and the contact surface is provided with a second positioning unit, wherein the first positioning unit and the second positioning unit are matched and installed in the vertical direction.

[0010] As an optional technical solution for the suspended relative size measuring device, a guide sleeve extending vertically is fixedly connected to the load-bearing frame of the mechanism. The side wall of the movable body slides in conjunction with the inner wall of the guide sleeve. A pressure adjustment mechanism is provided at the top of the guide sleeve, and the output end of the pressure adjustment mechanism is elastically connected to the top of the movable body.

[0011] As an optional technical solution for the suspended relative size measuring device, the measuring body also includes several guide bolts, the compensation pad has a through countersunk hole, the number of countersunk holes is the same as the number of guide bolts and they correspond one-to-one, the guide bolts pass through the countersunk holes and are screwed to the bottom of the movable body, and the surface of the guide bolts is spaced apart from the side wall of the countersunk hole.

[0012] As an optional technical solution for the suspended relative size measuring device, the measuring body further includes several thrust springs. The bottom of the movable body is recessed with an upper receiving groove, the number of which is the same as the number of thrust springs and they correspond one-to-one. The top of the compensation pad is recessed with a lower receiving groove, the number of which is the same as the number of thrust springs and they correspond one-to-one. The top of the thrust spring is placed in the upper receiving groove and is elastically connected to the bottom of the upper receiving groove, and the bottom of the thrust spring is placed in the lower receiving groove and is elastically connected to the bottom of the lower receiving groove.

[0013] As an optional technical solution for the suspended relative size measuring device, a number of limiting columns are also fixedly connected to the load-bearing frame of the mechanism. The limiting columns are used to limit the maximum stroke of the compensation pad.

[0014] As an optional technical solution for the suspended relative size measuring device, the measuring mechanism also includes multiple clamping mechanisms, which can press the product from bottom to top, so that part of the product is clamped between the clamping mechanism and the measuring reference pad.

[0015] As an optional technical solution for a suspended relative size measuring device, it includes a main frame, on which a suspension rail is provided, and a lifting mechanism is movably connected to the suspension rail. The lifting mechanism can move relative to the suspension rail in a horizontal plane, and a connecting rope is connected to the lifting mechanism, which can drive the connecting rope to move in a vertical direction.

[0016] A hanging-type product assembly method, which uses the aforementioned hanging-type relative dimension measuring device to install the product into the equipment assembly, includes the following steps:

[0017] S10: Adjust the position of the measuring mechanism using the hanging assembly so that all the measuring reference pads are in contact with the reference surface and the bottom of the compensation pad is in contact with the assembly surface;

[0018] S20: Control the measuring mechanism to fix the product;

[0019] S30: The measuring mechanism is raised using the suspension assembly, so that the product is suspended in the air;

[0020] S40: Read the measurement values ​​of all the displacement sensors, obtain the information of the assembly surface, and make the assembly shim according to the information of the assembly surface;

[0021] S50: Move the product into the equipment assembly, connect the equipment assembly and the product, and then control the measuring mechanism to release the product;

[0022] S60: Install the assembly pad onto the assembly surface.

[0023] The beneficial effects of this invention are:

[0024] This suspended relative dimension measuring device frees up floor space by suspending the entire measuring mechanism, making it suitable for compact production line layouts. The movable suspension components allow the measuring mechanism to actively adapt to the product's position, moving and fixing itself to the product during measurement. This effectively frees up the floor space occupied by traditional fixed floor measuring equipment, reducing the overall size and weight of the suspended relative dimension measuring device and lowering manufacturing costs. Furthermore, a measurement reference block is established by contacting the product's reference surface. The measuring body employs a combination of a movable body, compensation blocks, and rolling balls, providing floating compensation. This allows the compensation blocks to swing within a certain angle relative to the movable body, automatically compensating for angular deviations in the product's assembly surface caused by manufacturing or positioning errors. This reduces reliance on the product's incoming material positioning accuracy and improves the adaptability and reliability of the measurement. Multiple displacement sensors indirectly acquire dimensional information from multiple positions on the product's assembly surface by detecting the displacement of the top of the compensation blocks. The compact structure and high measurement accuracy contribute to improved measurement efficiency and consistency.

[0025] This suspended product assembly method integrates high-precision measurement with product handling and assembly preparation processes. By first adjusting and fixing the measuring mechanism to the product using a suspension assembly, reading the data, fabricating shims, and then hoisting the product to the equipment assembly for assembly, the method seamlessly connects high-precision relative dimensional measurement with subsequent assembly processes through the same suspension system, achieving continuous operation of "measurement-handling-assembly." This method eliminates the cumbersome steps of precise positioning of the product at the measurement station, removal after measurement, and repositioning for assembly in traditional processes, simplifying the process flow, significantly reducing material handling and repositioning, and greatly improving the overall operational efficiency and production cycle time of the assembly line. Simultaneously, the assembly shims fabricated based on accurate measurement data effectively compensate for product assembly errors, ensuring assembly accuracy and improving assembly quality. Attached Figure Description

[0026] Figure 1 This is a structural schematic diagram of the suspended relative size measuring device and product provided in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the measuring mechanism provided in an embodiment of the present invention;

[0028] Figure 3 This is a front view of the measuring mechanism provided in an embodiment of the present invention;

[0029] Figure 4 This is a top view of the measuring mechanism provided in an embodiment of the present invention;

[0030] Figure 5 This is a cross-sectional view of the connecting rope, measuring mechanism, and product provided in an embodiment of the present invention;

[0031] Figure 6 yes Figure 5 A magnified view of part A in the image;

[0032] Figure 7 This is a schematic diagram of the structure of the measurement reference pad provided in an embodiment of the present invention;

[0033] Figure 8 This is a flowchart of the hanging product assembly method provided in the embodiment of the present invention.

[0034] In the picture:

[0035] 1. Main frame; 2. Suspension rail; 3. Lifting mechanism; 4. Connecting rope; 5. Measuring mechanism; 6. Product; 11. Mechanism load-bearing frame; 12. Measuring body; 13. Clamping mechanism; 14. Measuring reference pad; 15. Operating handle; 16. Lifting ring; 21. Pressure adjustment mechanism; 22. Cylindrical shaft; 23. Limiting post; 24. Compensating pad; 25. Guide sleeve; 26. Mounting housing; 27. Displacement sensor; 31. Ball bearing; 32. Guide bolt; 33. Thrust spring; 34. Connecting block; 41. Air pipe connector; 42. Positioning pin hole; 43. Mounting bolt; 44. Air port; 45. Contact surface. Detailed Implementation

[0036] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Furthermore, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0040] like Figures 1 to 7As shown, the present invention provides a suspended relative dimension measuring device for measuring the assembly surface on a product 6. The product 6 also has a reference surface fixed in position relative to the assembly surface. The suspended relative dimension measuring device includes a suspension assembly and a measuring mechanism 5. The measuring mechanism 5 is suspended from the suspension assembly by a connecting rope 4. The measuring mechanism 5 can move in space relative to the suspension assembly. The measuring mechanism 5 selectively fixes the product 6. The measuring mechanism 5 includes a mechanism support frame 11, a measuring body 12 disposed on the mechanism support frame 11, and multiple measuring reference pads 14. The measuring reference pad 14 is used to contact the reference surface. The measuring body 12 includes a movable body, a compensation pad 24, a rolling ball 31, and multiple displacement sensors 27. The movable body can move vertically relative to the mechanism support frame 11, and the movable body is elastically connected to the mechanism support frame 11. The top of the compensation pad 24 and the bottom of the movable body swing relative to each other through the rolling ball 31. The bottom of the compensation pad 24 is used to contact the assembly surface. The displacement sensor 27 is located on the movable body, and the measuring end of the displacement sensor 27 presses against the top of the compensation pad 24.

[0041] This suspended relative dimension measuring device frees up floor space by suspending the measuring mechanism 5, making it suitable for compact production line layouts. The movable suspension components allow the measuring mechanism 5 to actively adapt to the position of the product 6, moving and fixing itself to the product 6 during measurement. This effectively frees up floor space occupied by traditional fixed floor measuring equipment, reducing the overall size and weight of the suspended relative dimension measuring device and lowering manufacturing costs. Furthermore, by setting the measuring reference pad 14 to contact the reference surface of the product 6, a measuring reference is established. The measuring body 12 uses a combination structure of a movable body, compensation pad 24, and rolling ball 31, providing floating compensation. This allows the compensation pad 24 to swing within a certain angle relative to the movable body, automatically compensating for angular deviations in the assembly surface of the product 6 caused by manufacturing or positioning errors. This reduces reliance on the incoming material positioning accuracy of the product 6 and improves the adaptability and reliability of the measurement. Multiple displacement sensors 27 indirectly obtain dimensional information from multiple positions on the assembly surface of the product 6 by detecting the displacement of the top of the compensation pad 24. This compact structure and high measurement accuracy contribute to improved measurement efficiency and consistency.

[0042] In this embodiment, product 6 is an example of an assembly in the automotive industry.

[0043] Specifically, the material of the rolling ball 31 is steel.

[0044] In this embodiment, the load-bearing frame 11 is responsible for bearing the weight of the entire measuring mechanism 5; a lifting ring 16 is installed on the top of the load-bearing frame 11, and a connecting rope 4 is connected to the lifting ring 16; an operating handle 15 is provided on both sides of the load-bearing frame 11, and the operating handle 15 is designed to facilitate manual operation.

[0045] In this embodiment, the bottom of the measuring reference pad 14 has a contact surface 45, which is used to fit against the reference surface. An air port 44 is provided on the reference surface. An airflow channel is provided inside the measuring reference pad 14. An air pipe connector 41 is inserted into the measuring reference pad 14. The air pipe connector 41 is connected to the air port 44 through the airflow channel. The air pipe connector 41 is used to connect to an external pressure detection sensor.

[0046] By incorporating an air path within the measuring reference pad 14, an air path pressure detection mechanism is added. When the contact surface 45 is in contact with the reference surface of the product 6, the air port 44 is sealed or the airflow is obstructed, causing a pressure change within the air path. An external pressure sensor detects this pressure change, enabling real-time and automatic determination of whether the measuring reference pad 14 and the reference surface of the product 6 are tightly fitted. This provides a reliable and sensitive fit detection method, avoiding measurement errors caused by poor fit and further ensuring the accuracy of the measurement results.

[0047] Furthermore, the reference surface is provided with a first positioning unit, and the contact surface 45 is provided with a second positioning unit. The first positioning unit and the second positioning unit are matched and installed in the vertical direction. Specifically, the first positioning unit is a positioning pin hole 42, which extends vertically through the measuring reference pad 14; the second positioning unit is a positioning pin, which protrudes from the top of the product 6 and can be matched and inserted into the positioning pin hole 42.

[0048] By setting a first positioning unit on the reference surface of product 6 and a matching second positioning unit on the contact surface 45 of the measuring reference pad 14, vertical alignment can be achieved, enabling rapid and accurate preliminary positioning between the measuring mechanism 5 and product 6. This simplifies the alignment operation between the measuring mechanism 5 and product 6, improves work efficiency, reduces the requirements for the absolute positioning accuracy of product 6 at the workstation, and ensures the reliability of the established measuring reference.

[0049] Specifically, the measuring reference pad 14 is mounted to the load-bearing frame 11 of the mechanism by mounting bolts 43.

[0050] In this embodiment, a guide sleeve 25 extending vertically is fixedly connected to the load-bearing frame 11. The side wall of the movable body slides in conjunction with the inner wall of the guide sleeve 25. A pressure adjustment mechanism 21 is provided at the top of the guide sleeve 25, and the output end of the pressure adjustment mechanism 21 is elastically connected to the top of the movable body. Specifically, the guide sleeve 25 is made of copper.

[0051] The aforementioned improvements refine the guiding and pressure adjustment structures of the moving body. The guide sleeve 25 provides precise linear guidance for the up-and-down movement of the moving body, ensuring the stability of the measuring body 12's movement, preventing skew from affecting measurement accuracy, and providing a stable measurement foundation for the displacement sensor 27. The pressure adjustment mechanism 21 can adjust the clamping force of the measuring mechanism 5 on the measured surface of the product 6 during measurement, and regulate the downward elastic force applied by the moving body. This allows for flexible adjustment of the contact clamping force of the measuring body 12 on the assembly surface of the product 6 according to different products 6 and measurement requirements. This ensures stable contact to obtain reliable signals while avoiding damage to the product 6 or measuring mechanism 5 due to excessive pressure, improving the controllability and safety of the measurement. This enables the suspended relative dimension measuring device to adapt to different product 6 materials or measurement requirements, ensuring sufficient contact to obtain accurate signals while preventing excessive pressure from damaging the product 6 or measuring components, thus improving the adaptability and controllability of the suspended relative dimension measuring device.

[0052] For example, the measuring body 12 also includes a number of guide bolts 32, and the compensation pad 24 has a countersunk hole. The number of countersunk holes is the same as the number of guide bolts 32 and they correspond one-to-one. The guide bolts 32 pass through the countersunk holes and are screwed to the bottom of the movable body. The surface of the guide bolts 32 is spaced apart from the side wall of the countersunk hole.

[0053] This design, on the one hand, limits the maximum relative separation distance between the compensation pad 24 and the moving body in the vertical direction, preventing it from falling off; on the other hand, the gap provides the necessary space for the compensation pad 24 to make micro-movements relative to the moving body in the horizontal plane and to swing around the rolling ball 31. This is a key mechanical structural guarantee for realizing the angle error compensation function, and the structure is simple and reliable. This provides the necessary space for the compensation pad 24 to achieve floating compensation relative to the moving body.

[0054] In this embodiment, the measuring body 12 also includes a plurality of thrust springs 33. The bottom of the movable body is recessed with an upper receiving groove. The number of upper receiving grooves is the same as the number of thrust springs 33 and they correspond one-to-one. The top of the compensation pad 24 is recessed with a lower receiving groove. The number of lower receiving grooves is the same as the number of thrust springs 33 and they correspond one-to-one. The top of the thrust spring 33 is placed in the upper receiving groove and is elastically connected to the bottom of the upper receiving groove. The bottom of the thrust spring 33 is placed in the lower receiving groove and is elastically connected to the bottom of the lower receiving groove.

[0055] Multiple thrust springs 33 provide evenly distributed elastic support between the moving body and the compensation pad 24. This design allows the compensation pad 24 to adaptively adjust its posture through the independent compression or extension of each spring when contacting uneven or angled assembly surfaces, achieving multi-degree-of-freedom floating. This structure, in conjunction with the rolling ball 31, ensures that the bottom of the compensation pad 24 maintains sufficient and uniform surface contact with the assembly surface of product 6, jointly achieving multi-degree-of-freedom flexible compensation for angular and positional deviations of the assembly surface of product 6. This accurately transmits changes in the assembly surface position to the displacement sensor 27 above, ensuring measurement accuracy. Simultaneously, the thrust springs 33 also ensure the reset of the compensation pad 24 when not in a measuring state.

[0056] For example, the active body includes a cylindrical shaft 22 and a connecting block 34 fixed to the bottom of the cylindrical shaft 22. The cylindrical shaft 22 is slidably engaged with the guide sleeve 25. The pressure adjustment mechanism 21 is connected to the top of the cylindrical shaft 22. The guide bolt 32 is screwed onto the connecting block 34.

[0057] In this embodiment, the measuring body 12 also includes a mounting shell 26, which is bolted to the load-bearing frame 11 of the mechanism. A guide sleeve 25 is sleeved inside the mounting shell 26, and the displacement sensor 27 is fixedly connected to the mounting shell 26.

[0058] For example, a number of limiting posts 23 are also fixed to the load-bearing frame 11 of the mechanism, and the limiting posts 23 are used to limit the maximum stroke of the compensation pad 24.

[0059] The limiting post 23 physically restricts the maximum displacement range of the compensation pad 24 during swinging or floating. This design provides overload protection: when the assembly surface error of product 6 is too large, causing the swing angle of the compensation pad 24 to exceed the design range, the limiting post 23 can prevent the compensation pad 24 from tilting or moving excessively, preventing it from rigidly colliding with the surrounding structure. This protects the precision displacement sensor 27 and the internal structure of the entire measuring body 12 from damage caused by over-range impact or compression, improving the reliability and service life of the suspended relative dimension measuring device.

[0060] In this embodiment, the measuring mechanism 5 also includes a plurality of clamping mechanisms 13, which can press the product 6 from bottom to top, so that part of the product 6 is clamped between the clamping mechanism 13 and the measuring reference pad 14.

[0061] After the measuring reference pad 14 is in contact with the reference surface of product 6, the clamping mechanism 13 acts on product 6 from below, forming a clamping force together with the measuring reference pad 14 above. This quickly and firmly clamps and fixes product 6 onto the measuring mechanism 5, ensuring stable contact between the reference surface of product 6 and the measuring reference pad 14, and between the assembly surface and the compensation pad 24, throughout the entire measurement process. This design ensures a stable relative position between product 6 and the measuring mechanism 5 throughout the entire measurement process, eliminating minor displacements caused by external forces or vibrations. It provides stable conditions for high-precision measurement, is suitable for fixing product 6 during suspended measurement, and provides convenience and safety.

[0062] For example, it includes a main frame 1, a hanging rail 2 on the main frame 1, a lifting mechanism 3 movably connected to the hanging rail 2, the lifting mechanism 3 being able to move relative to the hanging rail 2 in a horizontal plane, a connecting rope 4 connected to the lifting mechanism 3, and the lifting mechanism 3 being able to drive the connecting rope 4 to move in a vertical direction.

[0063] The main frame 1 and the suspended track 2 constitute a stable aerial support and guidance system. The lifting mechanism 3 can move horizontally on the suspended track 2, and combined with its own lifting function, it enables the measuring mechanism 5 to achieve large-scale, flexible, and precise positioning in three-dimensional space. This allows the measuring mechanism 5 to move quickly and accurately above products 6 at different workstations or different incoming material locations, and precisely land on products 6 for measurement, greatly improving the layout flexibility of the production line and the service range of the measuring workstation, adapting to the needs of diverse production lines.

[0064] like Figures 1 to 8 As shown, the present invention also provides a hanging product assembly method, which uses the above-mentioned hanging relative size measuring device to install product 6 into the equipment assembly. The hanging product assembly method includes the following steps:

[0065] Step 1: Use the hanging assembly to adjust the position of the measuring mechanism 5 so that all the measuring reference pads 14 are in contact with the reference surface and the bottom of the compensation pad 24 is in contact with the assembly surface.

[0066] Step 2: Control the measuring mechanism 5 to fix the product 6.

[0067] Step 3: Use the hanging assembly to raise the measuring mechanism 5, so that the product 6 is suspended in the air.

[0068] Step 4: Read the measurement values ​​of all displacement sensors 27, obtain the information of the assembly surface, and make the assembly shims according to the information of the assembly surface.

[0069] Step 5: Move product 6 into the equipment assembly, connect the equipment assembly and product 6, and then control the measuring mechanism 5 to release product 6.

[0070] Step 6: Install the assembly shims onto the assembly surface.

[0071] This suspended product assembly method integrates high-precision measurement with the handling and assembly preparation of product 6. By first adjusting and fixing the measuring mechanism 5 to product 6 using the suspension assembly, reading the data, fabricating shims, and then hoisting product 6 to the equipment assembly for assembly, the method seamlessly connects high-precision relative dimension measurement with subsequent assembly processes through the same suspension system, achieving continuous operation of "measurement-handling-assembly". This method eliminates the cumbersome steps of precise positioning of product 6 at the measurement station, removal after measurement, and repositioning for assembly in traditional processes, simplifying the process flow, significantly reducing material handling and repositioning, and greatly improving the overall operational efficiency and production cycle of the assembly line. Simultaneously, the assembly shims fabricated based on accurate measurement data effectively compensate for assembly errors of product 6, ensuring assembly accuracy and improving assembly quality.

[0072] 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 can make other variations or modifications based on the above description. 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 suspended relative dimension measuring device for measuring an assembly surface on a product (6), wherein the product (6) further has a reference surface fixed relative to the assembly surface, characterized in that, The suspended relative dimension measuring device includes: Hanging components; The measuring mechanism (5) is suspended from the hanging assembly by a connecting rope (4). The measuring mechanism (5) can move in space relative to the hanging assembly. The measuring mechanism (5) selectively fixes the product (6). The measuring mechanism (5) includes a mechanism support frame (11), a measuring body (12) disposed on the mechanism support frame (11), and a plurality of measuring reference pads (14). The measuring reference pads (14) are used to contact the reference surface. The measuring body (12) includes a movable body, a compensation pad (24), and a ball bearing. (31) and multiple displacement sensors (27), the movable body can move vertically relative to the mechanism support frame (11), and the movable body is elastically connected to the mechanism support frame (11). The top of the compensation pad (24) and the bottom of the movable body swing relative to each other through the rolling ball (31). The bottom of the compensation pad (24) is used to contact the assembly surface. The displacement sensor (27) is located on the movable body, and the measuring end of the displacement sensor (27) presses against the top of the compensation pad (24). The measuring body (12) also includes several guide bolts (32), the compensation pad (24) has a countersunk hole, the number of countersunk holes is the same as the number of guide bolts (32) and they correspond one to one, the guide bolts (32) pass through the countersunk hole and are screwed to the bottom of the movable body, and the surface of the guide bolts (32) is spaced apart from the side wall of the countersunk hole. The measuring body (12) also includes several thrust springs (33). The bottom of the movable body is recessed with an upper receiving groove. The number of the upper receiving grooves is the same as the number of the thrust springs (33) and they correspond one-to-one. The top of the compensation pad (24) is recessed with a lower receiving groove. The number of the lower receiving grooves is the same as the number of the thrust springs (33) and they correspond one-to-one. The top of the thrust spring (33) is placed in the upper receiving groove and is elastically connected to the bottom of the upper receiving groove. The bottom of the thrust spring (33) is placed in the lower receiving groove and is elastically connected to the bottom of the lower receiving groove.

2. The suspended relative dimension measuring device according to claim 1, characterized in that, The bottom of the measuring reference pad (14) has a contact surface (45) for fitting against the reference surface. An air port (44) is provided on the reference surface. An airflow channel is provided inside the measuring reference pad (14). An air pipe connector (41) is inserted into the measuring reference pad (14). The air pipe connector (41) is connected to the air port (44) through the airflow channel. The air pipe connector (41) is used to connect to an external pressure detection sensor.

3. The suspended relative dimension measuring device according to claim 2, characterized in that, The reference surface is provided with a first positioning unit, and the contact surface (45) is provided with a second positioning unit. The first positioning unit and the second positioning unit are matched and installed in the vertical direction.

4. The suspended relative dimension measuring device according to claim 1, characterized in that, A guide sleeve (25) extending vertically is fixed to the load-bearing frame (11) of the mechanism. The side wall of the movable body slides in cooperation with the inner wall of the guide sleeve (25). A pressure adjustment mechanism (21) is provided on the top of the guide sleeve (25). The output end of the pressure adjustment mechanism (21) is elastically connected to the top of the movable body.

5. The suspended relative dimension measuring device according to claim 1, characterized in that, Several limiting posts (23) are also fixedly connected to the load-bearing frame (11) of the mechanism. The limiting posts (23) are used to limit the maximum stroke of the compensation pad (24).

6. The suspended relative dimension measuring device according to claim 1, characterized in that, The measuring mechanism (5) also includes a plurality of clamping mechanisms (13), which can press the product (6) from bottom to top, so that part of the product (6) is clamped between the clamping mechanism (13) and the measuring reference pad (14).

7. The suspended relative dimension measuring device according to any one of claims 1-6, characterized in that, Includes a main frame (1), on which a hanging rail (2) is provided, and a lifting mechanism (3) is movably connected to the hanging rail (2). The lifting mechanism (3) can move relative to the hanging rail (2) in a horizontal plane. A connecting rope (4) is connected to the lifting mechanism (3), and the lifting mechanism (3) can drive the connecting rope (4) to move in a vertical direction.

8. A hanging product assembly method, wherein the product (6) is installed in the equipment assembly using the hanging relative dimension measuring device according to any one of claims 1-7, characterized in that, The method for assembling the suspended product includes the following steps: S10: Adjust the position of the measuring mechanism (5) using the hanging assembly so that all the measuring reference pads (14) are in contact with the reference surface and the bottom of the compensation pad (24) is in contact with the assembly surface; S20: Control the measuring mechanism (5) to fix the product (6); S30: The measuring mechanism (5) is raised using the hanging assembly, so that the product (6) is suspended in the air; S40: Read the measurement values ​​of all the displacement sensors (27), obtain the information of the assembly surface, and make the assembly pad according to the information of the assembly surface; S50: Move the product (6) into the equipment assembly, connect the equipment assembly and the product (6), and then control the measuring mechanism (5) to release the product (6). S60: Install the assembly pad onto the assembly surface.

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