Automobile auxiliary frame opening dimension measuring mechanism

Abstract

The invention discloses an automobile auxiliary frame opening dimension measuring mechanism, and belongs to the technical field of automobile part detection, the automobile auxiliary frame opening dimension measuring mechanism comprises a rack, a base plate and a transverse sliding seat, the base plate is installed on the rack through a longitudinal moving assembly, a spherical part and an elastic assembly are installed on the base plate, and the transverse sliding seat is connected with the base plate through the elastic assembly. The elastic assembly exerts upward thrust on the transverse sliding base so that a gap can exist between the transverse sliding base and the base plate, the transverse sliding base is erected on the spherical piece, two detection pieces are movably installed on the transverse sliding base respectively, and the two detection pieces are connected through a transverse power cylinder. The detection piece is attached to the inner side face of the opening structure of the to-be-detected auxiliary frame under the action of the transverse power cylinder, and the counter-acting force of the to-be-detected auxiliary frame on the detection piece drives the transverse sliding base to movably adjust the angle of the detection piece. And an automatic detection mechanism is designed, so that high-precision and high-adaptability internal dimension detection of the open gear structure is realized.

Description

Technical Field

[0001] This application relates to the technical field of automotive component detection, and particularly to a measuring mechanism for the opening dimension of an automotive subframe. Background Art

[0002] The automotive subframe is an important part of the vehicle chassis. Its main function is to provide installation and support for key components such as the vehicle's suspension system and powertrain. At the same time, it plays an important role in vibration reduction, noise reduction, improving assembly efficiency, and enhancing vehicle safety and comfort. As Figure 1 shown, the structure of the subframe is usually narrow U-shaped, and a U-shaped opening structure is also provided in the middle for connecting with other automotive components. Therefore, the opening dimension of the subframe, especially the distance between the mounting holes on both side walls of the opening structure, affects the assembly accuracy and product performance of the vehicle.

[0003] However, there are many difficulties in the existing measurement technologies for detecting the opening dimension of the subframe. On the one hand, currently commonly used detection tools such as calipers, although simple to operate, have limitations in measuring the opening dimension of the subframe. Due to the complex structure of the subframe, when manually measuring with calipers, it is easily affected by factors such as the operator's technical level and measurement angle, resulting in large measurement errors. In addition, caliper measurement requires frequent contact and adjustment of the measurement position, which is not only inefficient but may also cause damage to the surface of the subframe due to improper operation.

[0004] On the other hand, currently related prior arts such as the Chinese patent application "A freely telescopic opening detection tool", publication number: CN209763930U; disclose a structure including a fixed seat, a handle is installed on the fixed seat, a scale plate is installed below the fixed seat, a fixed block is installed at one end of the lower end surface of the scale plate, and a movable slider is installed at the other end. The slider and the scale plate are guided to move by a T-shaped guide groove and a T-shaped guide rail. Guide grooves are provided on the scale plate on both sides of the T-shaped guide groove along the scale line direction. Activity surface guide chutes are respectively provided at the corresponding positions of the fixed seat and the two guide grooves. Guide rods cooperating with the guide grooves are provided on the slider, and movable ball pulleys are installed at the upper ends of the guide rods. The movable ball pulleys are guided to move in the activity surface guide chutes, and a spring is fixedly installed between the fixed block and the slider. Although the above detection tooling can measure the U-shaped structure, it mainly targets the outer profile, and the detection accuracy of the distance between the internal mounting holes is insufficient.

[0005] In summary, the existing measurement technologies and tools have problems such as low measurement accuracy, inconvenient operation, and easy damage to products when detecting the opening dimension of the automotive subframe, especially the distance between the mounting holes on both side walls of the U-shaped opening structure, and it is difficult to meet the requirements of modern automotive manufacturing for high-precision and high-efficiency detection. Summary of the Invention

[0006] The technical problem to be solved by this application is to provide a measuring mechanism for the opening dimension of an automotive subframe, design an automated detection mechanism, and achieve the detection of the internal dimension of the opening structure with high precision and high adaptability.

[0007] The technical solution adopted in this application is as follows: A measuring mechanism for the opening dimension of an automotive subframe includes a frame, a base plate, and a transverse sliding seat. The base plate is installed on the frame through a longitudinal moving component. A spherical part and an elastic component are installed on the base plate. The transverse sliding seat is connected to the base plate through the elastic component. The elastic component applies an upward thrust to the transverse sliding seat, creating a gap between the transverse sliding seat and the base plate. The transverse sliding seat is mounted on the spherical part. Two detection components are respectively movably installed on the transverse sliding seat. The two detection components are connected by a transverse power cylinder. Under the action of the transverse power cylinder, the detection components are in contact with the inner side surface of the opening structure of the subframe to be detected. The reaction force of the subframe to be detected on the detection components drives the transverse sliding seat to move and adjust the angle of the detection components.

[0008] Compared with the prior art, the advantages of this application are as follows: Through the combined design of the elastic component and the spherical part, the transverse sliding seat can be finely adjusted in multiple directions under the drive of the reaction force of the subframe to be detected. The spherical part serves as a fulcrum, allowing the sliding seat to freely deflect around three-dimensional space. Combined with the flexible support of the elastic component, the detection components can adaptively fit the inner side surfaces of the opening structures at different angles, effectively eliminating the influence of assembly deviations on measurement. At the same time, when the transverse power cylinder drives the detection components to actively press against the measured surface, the pre-tightening force provided by the elastic component and the reaction force of the workpiece form a dynamic balance. This structure not only ensures the stability of the measurement contact but also can compensate for the dimensional tolerance of the workpiece through the floating adjustment of the sliding seat, avoiding measurement overload or surface damage caused by rigid contact. Moreover, through the settings of the transverse sliding seat and the longitudinal moving component in this application, the detection components can extend into the U-shaped opening structure of the subframe for detection, and can well adapt to the detection environment of the subframe.

[0009] In the detection of the subframe, the entire subframe is fixedly installed and then detected. After the entire subframe is installed, it is very difficult to ensure that the opening structure of the subframe is exactly horizontal, and there are certain error items in the position of the opening structure of the subframe itself. The design of the floating transverse sliding seat can well solve this problem.

[0010] In some embodiments of this application, an arc-shaped depression adapted to the spherical part is provided on the top surface of the base plate. The bottom of the spherical part is located in the arc-shaped depression and is movably connected to the arc-shaped depression.

[0011] In the present application, the spherical member constitutes the base point of the transverse slide, and the transverse slide is subjected to force and floats with the spherical member as the base point. The arc-shaped depression provides a stable support surface for the spherical member, limits the horizontal displacement of the spherical member but allows it to rotate, ensures that the transverse slide deflects accurately around the spherical member, and reduces sliding friction interference.

[0012] In some embodiments of the present application, the top of the spherical member is embedded in a transverse slide, there is a gap between the transverse slide and the substrate connected by the spherical member, and a gyroscope is installed in the spherical member.

[0013] By setting up a gyroscope, it is possible to detect the deflection angle of the lateral slide, that is, to detect the angle of the inner side of the opening structure of the subframe to be detected, and further perform a depth detection of the opening structure of the subframe. The gyroscope directly monitors the deflection angle of the lateral slide, converts mechanical motion into angle data, realizes quantitative detection of the inclination angle of the inner side of the opening structure, and improves the detection dimension.

[0014] In some embodiments of the present application, four groups of elastic components are arranged on the substrate, and the four groups of elastic components are respectively arranged at the four corners of the transverse slide. The elastic components include a connecting rod and a spring. The spring is arranged outside the connecting rod, and the spring applies force to the transverse slide.

[0015] The arrangement of the four sets of elastic components provides a uniform and stable supporting force for the lateral slide. By setting the spring sleeve outside the connecting rod, the spring can have good elasticity and stability when subjected to force, ensuring that the lateral slide can produce appropriate displacement and adjustment when subjected to forces in different directions, while at the same time preventing the lateral slide from moving excessively or losing control due to excessive elastic force.

[0016] In some embodiments of the present application, a mounting groove for installing an elastic component is provided on the substrate, and the mounting groove is a stepped hole structure, comprising a first main hole and a first secondary hole connected in sequence from top to bottom, the diameter of the first main hole is larger than the first secondary hole, the bottom of the connecting rod is inserted into the first secondary hole, and the outer diameter of the connecting rod is adapted to the hole diameter of the first secondary hole.

[0017] The installation slot with stepped hole structure provides precise positioning and fixation for the installation of elastic components, ensuring the stability and verticality of the connecting rod during installation, and avoiding measurement errors caused by loosening or displacement of the elastic components during measurement.

[0018] In some embodiments of the present application, a connection hole is provided on the transverse sliding seat. The connection hole is a stepped hole, which includes a second secondary hole and a second main hole connected in sequence from top to bottom. The diameter of the second main hole is larger than that of the second secondary hole. The diameter of the second secondary hole is larger than the outer diameter of the connecting rod. The top of the connecting rod passes through the second secondary hole, and a rod cap is provided at the top of the connecting rod. The outer diameter of the rod cap is larger than the diameter of the second secondary hole, and the rod cap is located above the transverse sliding seat.

[0019] This design of the connection hole with a stepped hole structure and the setting of the rod cap effectively limit the relative movement between the connecting rod and the transverse sliding seat, ensuring that the elastic component will not fall off the transverse sliding seat during operation. The design that the diameter of the second secondary hole is larger than the outer diameter of the connecting rod also provides a stable connection foundation for the floating and adjustment of the transverse sliding seat, enabling it to better adapt to the reaction force of the subframe to be detected, thereby improving the stability and accuracy of the measurement.

[0020] In some embodiments of the present application, one end of the spring is inserted into the first main hole, and the other end of the spring is inserted into the second main hole. The spring is in a compressed state; the spring is a linear spring or a spherical spring.

[0021] By selecting a linear spring or a spherical spring, elastic supports with different characteristics can be provided according to different measurement requirements and working conditions. The linear spring can provide a relatively uniform elastic force and is suitable for situations where high stability of the elastic support is required; while the spherical spring has better adaptability and flexibility. When the transverse sliding seat needs to be finely adjusted in multiple directions, it can more effectively provide elasticity and support force, thus meeting the requirements in different measurement scenarios and improving the versatility and adaptability of the measuring mechanism.

[0022] In some embodiments of the present application, a first detection block and a second detection block are movably installed on the transverse sliding seat. Both the first detection block and the second detection block extend forward to form a detection piece. A reference ring is installed on the outer side surface of the detection piece. The reference ring protrudes from the detection piece. The detection piece is in contact with the inner side surface of the open slot structure of the subframe to be detected through the reference ring. One end of the detection piece is a circular ring structure adapted to the reference ring structure, and the other end of the detection piece is a rod-shaped structural member connected to the first detection block or the second detection block.

[0023] The detection piece can accurately contact and fit with the inner side surface of the open slot structure of the subframe to be detected. The protruding design of the reference ring increases the effective contact area between the detection piece and the inner side surface of the open slot structure, improves the stability of the measurement, and also helps to more accurately obtain the dimensional information of the inner side surface of the open slot structure.

[0024] In some embodiments of the present application, a transverse power cylinder is installed at the rear side of the first detection block. The transmission shaft of the transverse power cylinder is connected to the second detection block. When the transverse power cylinder operates, it pushes the first detection block and the second detection block away from or close to each other. The transverse power cylinder is preset with a maximum thrust force.

[0025] The preset maximum thrust force of the transverse power cylinder can ensure that the detected part will not be deformed due to excessive thrust force during the measurement process, and at the same time, it also avoids the situation that the detected part cannot be fully attached to the measured surface due to insufficient thrust force.

[0026] In some embodiments of the present application, an electronic displacement sensor is installed on the first detection block, and a displacement feedback part matching with the electronic displacement sensor is installed on the second detection block.

[0027] By detecting the displacement of the displacement feedback part, the displacement sensor can obtain the distance between the outer sides of the two reference rings, that is, the inner side dimension of the open structure of the subframe to be detected.

[0028] In some embodiments of the present application, limit blocks at the extreme positions are provided at both ends of the transverse sliding seat, which are used to limit the extreme positions of the first detection block and the second detection block when they move on the transverse sliding seat. This can prevent the detected part from being over-extended or over-retracted under the action of the transverse power cylinder, which may cause equipment damage or an increase in measurement error. This design can ensure that the detected part moves within a reasonable working range.

[0029] In some embodiments of the present application, the longitudinal movement assembly includes two left and right longitudinal slide rails provided on the frame. The substrate is installed on the two longitudinal slide rails. The longitudinal slide rails are perpendicular to the transverse sliding seat. An L-shaped limit block is also provided on the frame, and the L-shaped limit block limits the forward movement position limit of the substrate.

[0030] The design of the longitudinal movement assembly enables the substrate to move smoothly and accurately along the longitudinal direction, so as to ensure that the detected part can accurately extend into the U-shaped open structure of the subframe, meeting the measurement requirements of different sizes and positions. The installation of the L-shaped limit block further ensures that the substrate will not exceed the predetermined range when moving forward. The settings of the longitudinal slide rails and the transverse sliding seat meet the adjustability of the first detection block and the second detection block on the plane.

[0031] In the present application, for the convenience of description, the side of the inspection tool close to the subframe is defined as the front side.

[0032] On the basis of conforming to the common knowledge in the art, the above-mentioned embodiments can be combined arbitrarily. Description of the Drawings

[0033] The present application will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are only drawn for the purpose of explaining the preferred embodiments and should not be construed as limiting the scope of the present application. In addition, unless otherwise specified, the drawings only schematically show the composition or structure of the described object and may include exaggerated displays, and the drawings are not necessarily drawn to scale.

[0034] Figure 1 is the structure of the automotive subframe to be detected; Figure 2 is the schematic structural diagram of the present application; Figure 3 is the schematic internal structure diagram of the present application; Figure 4 is the top view of the frame of the present application; Figure 5 is Figure 4 the sectional view of the AA section in Figure 6 is Figure 4 the sectional view of the BB section in Figure 7 is the schematic structural diagram on the substrate of the present application.

[0035] Among them, the specific descriptions of the reference numerals are as follows: 1, frame; 2, substrate; 3, transverse sliding seat; 5, spherical part; 6, elastic component; 7, transverse power cylinder; 8, detection piece; 9, arc-shaped depression; 11, connecting rod; 12, spring; 13, installation groove; 14, first main hole; 15, first secondary hole; 16, connection hole; 17, second secondary hole; 18, second main hole; 19, rod cap; 22, first detection block; 23, second detection block; 24, reference ring; 25, electronic displacement sensor; 26, displacement feedback piece; 27, limit position stop block; 28, longitudinal slide rail; 29, L-shaped limit block; 41, subframe; 41a, opening structure. Specific Embodiments

[0036] The following will describe the present application in detail in conjunction with the accompanying drawings.

[0037] In order to make the purpose, technical solutions and advantages of the present application more clear, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0038] An automotive subframe opening size measuring mechanism, as shown in Embodiment 1 Figures 1 to 3As shown in the figure, it includes a frame 1, a substrate 2 and a transverse slide 3. The substrate 2 is installed on the frame 1 through a longitudinal movement component. A spherical part 5 and an elastic component 6 are installed on the substrate 2. The transverse slide 3 is connected to the substrate 2 through the elastic component 6. The elastic component 6 applies an upward thrust to the transverse slide 3 so that there is a gap between the transverse slide 3 and the substrate 2. The transverse slide 3 is mounted on the spherical part 5. Through the combined design of the elastic component 6 and the spherical part 5, the transverse slide 3 can be finely adjusted in multiple directions under the driving of the reaction force of the subframe 41 to be detected. The spherical part 5 serves as a fulcrum, allowing the slide to freely deflect around three-dimensional space. With the flexible support of the elastic component 6, the detecting part 8 can adaptively fit the inner side surface of the opening structure 41a at different angles, effectively eliminating the influence of assembly deviation on measurement.

[0039] Two detecting parts 8 are respectively movably installed on the transverse slide. The two detecting parts 8 are connected by a transverse power cylinder 7. The detecting part 8 fits against the inner side surface of the opening structure 41a of the subframe 41 to be detected under the action of the transverse power cylinder 7. The reaction force of the subframe 41 to be detected on the detecting part 8 drives the transverse slide 3 to actively adjust the angle of the detecting part 8. When the transverse power cylinder 7 drives the detecting part 8 to actively press against the measured surface, the pre-tightening force provided by the elastic component 6 and the reaction force of the workpiece form a dynamic balance. This structure not only ensures the stability of measurement contact, but also can compensate for the dimensional tolerance of the workpiece through the floating adjustment of the slide, avoiding measurement overload or surface damage caused by rigid contact.

[0040] Through the arrangement of the transverse slide 3 and the longitudinal movement component in this application, the detecting part 8 can extend into the U-shaped opening structure 41a of the subframe 41 for detection, and can well adapt to the detection environment of the subframe 41.

[0041] In this application, for the convenience of description, the side of the inspection tool close to the subframe 41 is defined as the front side.

[0042] Embodiment 2, as Figures 1 to 7 As shown in the figure, an arc-shaped depression 9 adapted to the spherical part 5 is provided on the top surface of the substrate 2. The bottom of the spherical part 5 is located in the arc-shaped depression 9 and is movably connected to the arc-shaped depression 9. In this application, the spherical part 5 constitutes the base point for the movement of the transverse slide 3. When the transverse slide 3 is stressed, it floats with the spherical part 5 as the base point. The arc-shaped depression 9 provides a stable support surface for the spherical part 5, restricting the horizontal displacement of the spherical part 5 but allowing it to rotate, ensuring that the transverse slide 3 deflects precisely around the spherical part 5 and reducing the interference of sliding friction.

[0043] The top of the spherical member 5 is embedded in the transverse slide 3. There is a gap between the transverse slide 3 and the base plate 2 connected by the spherical member 5. A gyroscope is installed in the spherical member 5. By setting the gyroscope, the deflection angle of the transverse slide 3 can be detected, that is, the angle of the inner side of the opening structure 41a of the sub-frame 41 to be detected is detected, and the depth of the opening structure 41a of the sub-frame 41 is further detected. The gyroscope directly monitors the deflection angle of the transverse slide 3, converts the mechanical motion into angle data, realizes the quantitative detection of the inclination angle of the inner side of the opening structure 41a, and improves the detection dimension.

[0044] Four groups of elastic components 6 are arranged on the base plate 2, and the four groups of elastic components 6 are respectively arranged at the four corners of the transverse slide 3. The elastic components 6 include a connecting rod 11 and a spring 12. The spring 12 is sleeved outside the connecting rod 11, and the spring 12 applies force to the transverse slide 3. The arrangement of the four groups of elastic components 6 provides a uniform and stable supporting force for the transverse slide 3. By sleeved outside the connecting rod 11, the spring 12 can have good elasticity and stability when subjected to force, ensuring that the transverse slide 3 can produce appropriate displacement and adjustment when subjected to forces in different directions, and at the same time, the transverse slide 3 will not move excessively or lose control due to excessive elastic force. This uniformly distributed elastic support method helps to improve the fit between the transverse slide 3 and the subframe 41 to be detected, thereby improving the accuracy and reliability of the measurement.

[0045] The base plate 2 is provided with a mounting groove 13 for mounting the elastic component 6. The mounting groove 13 is a stepped hole structure. The mounting groove 13 includes a first main hole 14 and a first primary hole 15 connected in sequence from top to bottom. The diameter of the first main hole 14 is larger than the first primary hole 15. The bottom of the connecting rod 11 is inserted into the first primary hole 15, and the outer diameter of the connecting rod 11 is adapted to the aperture of the first primary hole 15. The mounting groove 13 with a stepped hole structure provides precise positioning and fixation for the installation of the elastic component 6, ensuring the stability and verticality of the connecting rod 11 during the installation process. This structural design enables the elastic component 6 to be firmly mounted on the base plate 2, avoiding measurement errors caused by loosening or displacement of the elastic component 6 during the measurement process. At the same time, the design that the diameter of the first main hole 14 is larger than the first primary hole 15 provides sufficient space for the installation and compression of the spring 12, ensuring that the spring 12 can normally play its elastic role without being damaged, further improving the stability and reliability of the measuring mechanism.

[0046] A connection hole 16 is provided on the horizontal sliding seat 3. The connection hole 16 is a stepped hole, which includes a second-stage hole 17 and a second main hole 18 connected in sequence from top to bottom. The diameter of the second main hole 18 is larger than that of the second-stage hole 17. The aperture of the second-stage hole 17 is larger than the outer diameter of the connecting rod 11. The top of the connecting rod 11 passes through the second-stage hole 17, and a rod cap 19 is provided at the top of the connecting rod 11. The outer diameter of the rod cap 19 is larger than the aperture of the second-stage hole 17, and the rod cap 19 is located above the horizontal sliding seat 3. The design of the connection hole 16 with such a stepped hole structure and the setting of the rod cap 19 effectively limit the relative movement between the connecting rod 11 and the horizontal sliding seat 3, ensuring that the elastic component 6 will not fall off the horizontal sliding seat 3 during operation. The outer diameter of the rod cap 19 is larger than the aperture of the second-stage hole 17, so that when the connecting rod 11 is subjected to an upward pulling force or a lateral force, the horizontal sliding seat 3 will not separate from the connecting rod 11, ensuring the structural integrity of the entire measuring mechanism. At the same time, the design that the aperture of the second-stage hole 17 is larger than the outer diameter of the connecting rod 11 also provides a stable connection basis for the floating and adjustment of the horizontal sliding seat 3, enabling it to better adapt to the reaction force of the subframe 41 to be detected, thereby improving the stability and accuracy of the measurement.

[0047] One end of the spring 12 is inserted into the first main hole 14, and the other end of the spring 12 is inserted into the second main hole 18. The spring 12 is in a compressed state; the spring 12 is a linear spring 12 or a spherical spring 12. The two ends of the spring 12 are respectively inserted into the first main hole 14 and the second main hole 18 and are in a compressed state. Such an installation method enables the spring 12 to fully exert its elastic effect and provide a continuous and stable thrust for the horizontal sliding seat 3. By selecting a linear spring 12 or a spherical spring 12, elastic supports with different characteristics can be provided according to different measurement requirements and working conditions. The linear spring 12 can provide a relatively uniform elastic force and is suitable for situations where high stability of the elastic support is required; while the spherical spring 12 has better adaptability and flexibility. When the horizontal sliding seat 3 needs to be finely adjusted in multiple directions, it can more effectively provide elasticity and support force, thus meeting the requirements in different measurement scenarios and improving the versatility and adaptability of the measuring mechanism.

[0048] The other content of the second embodiment is the same as that of the first embodiment.

[0049] Embodiment 3, as Figures 1 to 7As shown, a first detection block 22 and a second detection block 23 are movably installed on the transverse sliding seat 3. The first detection block 22 and the second detection block 23 both extend forward to form a detection member 8. A reference ring 24 is installed on the outer side surface of the detection member 8. The reference ring 24 protrudes from the detection member 8. The detection member 8 is in contact with the inner side surface of the opening structure 41a of the subframe 41 to be detected through the reference ring 24. One end of the detection member 8 is a circular ring structure adapted to the structure of the reference ring 24, and the other end of the detection member 8 is a rod-shaped structural member connected to the first detection block 22 or the second detection block 23. By arranging the first detection block 22 and the second detection block 23 to extend forward to form the detection member 8 and installing the protruding reference ring 24 on the outer side surface of the detection member 8, the detection member 8 can accurately contact and fit with the inner side surface of the opening structure 41a of the subframe 41 to be detected. The protruding design of the reference ring 24 increases the effective contact area between the detection member 8 and the inner side surface of the opening structure 41a, improves the stability of measurement, and also helps to more accurately obtain the size information of the inner side surface of the opening structure 41a. The rod-shaped connection mode of the detection member 8 with the first detection block 22 or the second detection block 23 ensures that the detection member 8 can flexibly expand and contract and adjust under the action of the transverse power cylinder 7, so as to better adapt to subframes 41 with different sizes of opening structures 41a, and improve the versatility and measurement accuracy of the measuring mechanism.

[0050] A transverse power cylinder 7 is installed at the rear side of the first detection block 22. The transmission shaft of the transverse power cylinder 7 is connected to the second detection block 23. The transverse power cylinder 7 works to push the first detection block 22 and the second detection block 23 away from or close to each other. The transverse power cylinder 7 is preset with a maximum thrust. This design of pushing the first detection block 22 and the second detection block 23 away from or close to each other by the transverse power cylinder 7 realizes the automatic telescopic control of the detection member 8 and improves the automation degree of the measurement process. The preset maximum thrust of the transverse power cylinder 7 can ensure that the detection member 8 will not be deformed due to excessive thrust during the measurement process, and at the same time avoid the situation that the detection member 8 cannot be fully attached to the measured surface due to insufficient thrust. This design ensures the stability and reliability of the measurement contact, helps to improve the measurement accuracy and repeatability, and also extends the service life of the equipment and the measured workpiece.

[0051] An electronic displacement sensor 25 is installed on the first detection block 22, and a displacement feedback member 26 cooperating with the electronic displacement sensor 25 is installed on the second detection block 23. By detecting the displacement of the displacement feedback member 26, the distance between the outer sides of the two reference rings 24 can be obtained, that is, the inner side dimension of the opening structure 41a of the subframe 41 to be detected. The combined use of the electronic displacement sensor 25 and the displacement feedback member 26 can measure the change in the distance between the two detection members 8, that is, the outer sides of the two reference rings 24, in real time and accurately. This measurement method has the characteristics of high precision, high sensitivity, and fast response, ensuring the accuracy and reliability of the measurement data and providing a strong guarantee for the accurate measurement of the size of the opening structure 41a of the subframe 41.

[0052] Limit position stoppers 27 are provided at both ends of the transverse sliding seat 3 to limit the limit positions of the first detection block 22 and the second detection block 23 when moving on the transverse sliding seat 3. This prevents the detection member 8 from overextending or retracting under the action of the transverse power cylinder 7, which may cause equipment damage or an increase in measurement error. This design can ensure that the detection member 8 moves within a reasonable working range, avoiding failures or safety accidents caused by the detection member 8 moving out of the predetermined range. At the same time, it also ensures the stability and reliability of the measurement process, improving the safety and service life of the measurement mechanism.

[0053] The longitudinal moving assembly includes two left and right longitudinal slide rails 28 provided on the frame 1. The substrate 2 is installed on the two longitudinal slide rails 28. The longitudinal slide rails 28 are perpendicular to the transverse sliding seat 3. An L-shaped limit block 29 is also provided on the frame 1, and the L-shaped limit block 29 limits the forward movement position limit of the substrate 2. The design of the longitudinal moving assembly enables the substrate 2 to move smoothly and accurately in the longitudinal direction, ensuring that the detection member 8 can accurately extend into the U-shaped opening structure 41a of the subframe 41 to meet the measurement requirements of different sizes and positions. The setting of the two longitudinal slide rails 28 improves the stability and load-bearing capacity of the substrate 2 during movement, avoiding measurement errors caused by the substrate 2 tilting or shaking during movement. The installation of the L-shaped limit block 29 further ensures that the substrate 2 will not exceed the predetermined range when moving forward, avoiding collisions or other damages between the equipment and the subframe 41 caused by the substrate 2 moving forward excessively, and improving the overall safety and reliability of the measurement mechanism. The setting of the longitudinal slide rails 28 and the transverse sliding seat 3 enables the first detection block 22 and the second detection block 23 to be adjustable on the plane.

[0054] The other contents of Embodiment 3 are the same as those of Embodiment 1 or Embodiment 2.

[0055] The above has introduced the present application in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the present application and its core idea. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present application, several improvements and modifications can still be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A vehicle subframe opening size measuring mechanism, characterized in that: The invention comprises a frame (1), a base plate (2) and a transverse slide (3), wherein the base plate (2) is mounted on the frame (1) via a longitudinal moving component, a spherical component (5) and an elastic component (6) are mounted on the base plate (2), the transverse slide (3) is connected to the base plate (2) via the elastic component (6), the elastic component (6) applies an upward thrust to the transverse slide (3) so that a gap exists between the transverse slide (3) and the base plate (2), the transverse slide (3) is mounted on the spherical component (5), two detection components (8) are movably mounted on the transverse slide (3), the two detection components (8) are connected by a transverse power cylinder (7), the detection components (8) are fitted with the inner side surface of the opening structure (41a) of the sub-frame (41) to be detected under the action of the transverse power cylinder (7), and the reaction force of the sub-frame (41) to be detected on the detection component (8) drives the transverse slide (3) to movably adjust the angle of the detection component (8).

2. The automobile subframe opening dimension measuring mechanism according to claim 1, characterized in that: The top surface of the base plate (2) is provided with an arc-shaped recess (9) adapted to the spherical member (5); the bottom of the spherical member (5) is located in the arc-shaped recess (9) and is movably connected to the arc-shaped recess (9).

3. The automobile subframe opening dimension measuring mechanism according to claim 1, characterized in that: The top of the spherical member (5) is embedded in the transverse slide seat (3), a distance exists between the transverse slide seat (3) and the base plate (2) connected by the spherical member (5), and a gyroscope is installed in the spherical member (5).

4. The automobile subframe opening dimension measuring mechanism according to claim 1, characterized in that: Four groups of elastic components (6) are arranged on the base plate (2), and the four groups of elastic components (6) are respectively arranged at four corners of the transverse slide seat (3). The elastic components (6) include a connecting rod (11) and a spring (12). The spring (12) is sleeved outside the connecting rod (11), and the spring (12) applies force to the transverse slide seat (3).

5. The automobile subframe opening dimension measuring mechanism according to claim 1 or 4, characterized in that: The base plate (2) is provided with a mounting groove (13) for mounting the elastic component (6); the mounting groove (13) is a stepped hole structure; the mounting groove (13) comprises a first main hole (14) and a first secondary hole (15) which are sequentially connected from top to bottom; the diameter of the first main hole (14) is larger than the first secondary hole (15); the bottom of the connecting rod (11) is inserted into the first secondary hole (15), and the outer diameter of the connecting rod (11) is adapted to the hole diameter of the first secondary hole (15).

6. The automobile subframe opening dimension measuring mechanism according to claim 5, characterized in that: The transverse slide seat (3) is provided with a connecting hole (16), the connecting hole (16) is a stepped hole, the connecting hole (16) comprises a secondary hole (17) and a second main hole (18) connected in sequence from top to bottom, the diameter of the second main hole (18) is larger than the diameter of the secondary hole (17), the aperture of the secondary hole (17) is larger than the outer diameter of the connecting rod (11), the top of the connecting rod (11) passes through the secondary hole (17), the top of the connecting rod (11) is provided with a rod cap (19), the outer diameter of the rod cap (19) is larger than the aperture of the secondary hole (17), and the rod cap (19) is located above the transverse slide seat (3).

7. The automobile subframe opening dimension measuring mechanism according to claim 6, characterized in that: One end of the spring (12) is inserted into the first main hole (14), and the other end of the spring (12) is inserted into the second main hole (18); the spring (12) is in a compressed state; the spring (12) is a linear spring (12) or a spherical spring (12).

8. The automobile subframe opening dimension measuring mechanism according to claim 1, characterized in that: A first detection block (22) and a second detection block (23) are movably mounted on the transverse slide seat (3); the first detection block (22) and the second detection block (23) both extend forward to form a detection member (8); a reference ring (24) is mounted on the outer side surface of the detection member (8); the reference ring (24) is protrudingly arranged on the detection member (8); the detection member (8) is fitted with the inner side surface of the opening structure (41a) of the sub-frame (41) to be detected via the reference ring (24); one end of the detection member (8) is a circular ring structure adapted to the structure of the reference ring (24); the other end of the detection member (8) is a rod-shaped structure connected to the first detection block (22) or the second detection block (23).

9. The automobile subframe opening dimension measuring mechanism according to claim 8, characterized in that: A transverse power cylinder (7) is installed on the rear side of the first detection block (22); a transmission shaft of the transverse power cylinder (7) is connected to the second detection block (23); the transverse power cylinder (7) works to push the first detection block (22) and the second detection block (23) away from or towards each other; and the transverse power cylinder (7) is preset with a maximum thrust.

10. The automobile subframe opening dimension measuring mechanism according to claim 8, characterized in that: An electronic displacement sensor (25) is mounted on the first detection block (22), and a displacement feedback component (26) matching the electronic displacement sensor (25) is mounted on the second detection block (23).

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