Modular reconfigurable flexible measurement support and combined system thereof

Abstract

The application discloses a modular reconfigurable flexible measuring support and a combined system thereof, and relates to the technical field of automobile part processing and measuring. The flexible measuring support comprises a Base frame and a flexible support base. The Base frame is provided with a plurality of mounting holes arranged in an array at a predetermined interval. The flexible support base is detachably mounted on the Base frame and comprises a base, a Z-axis lifting mechanism, an XY-axis displacement platform and a position precision feedback system. The Z-axis lifting mechanism is arranged on the base and is used for driving the sliding support base to lift along the Z-axis direction. The XY-axis displacement platform is arranged on the top of the sliding support base and is used for realizing displacement adjustment in the X-axis and Y-axis directions. The position precision feedback system is used for detecting the lifting position of the sliding support base in real time and feeding back to the control system to realize closed-loop control. The application adopts modular design and can be freely combined and configured, realizes one-to-many measurement, greatly reduces the cost and reduces the storage space occupation.

Description

Technical Field

[0001] This invention relates to the field of automotive parts processing and measurement technology, specifically to a flexible measuring bracket for coordinate measuring machines, and more particularly to a modular and reconfigurable flexible measuring bracket and its combined system. Background Technology

[0002] In the manufacturing process of automotive parts, the coordinate measuring machine (CMM) stand for the body-in-white is an important piece of equipment for measuring and evaluating the geometric accuracy of the body-in-white. The purpose of the CMM stand is to precisely position the body-in-white in the vehicle coordinate system so that a CMM can perform 3D measurements on it.

[0003] With the development of the automotive industry and the increasing number of car models, the dimensions of the body-in-white vary among different models, placing higher demands on the versatility and flexibility of measurement brackets. Existing body-in-white measurement brackets mainly suffer from the following problems: First, they are highly specialized and costly. Existing measurement brackets require one-to-one matching; a complete set of brackets needs to be specially manufactured for each new product, resulting in high user costs. Second, they occupy a large amount of storage space. Since each car model requires a dedicated measurement bracket, the more products there are, the more space the measurement brackets occupy. Third, they lack versatility. Although some adjustable flexible bracket solutions have emerged in the existing technology, their adjustment range is limited and cannot meet the large adjustment needs of different car models. For example, Chinese patent CN202033015U discloses a flexible bracket for three-coordinate measurement of body-in-white, which achieves adjustment in three directions through a stacked structure of Z-axis adjustment pads, Y-axis adjustment mounting plates, and X-axis adjustment mounting plates. However, in this solution, Z-axis adjustment requires replacing pads of different heights, resulting in a limited adjustment range and cumbersome operation. X and Y-axis adjustments are achieved through a manual screw mechanism, with a small adjustable range (1mm-200mm in X-axis and 1mm-50mm in Y-axis), and the adjustment plates are directly stacked, leading to high adjustment resistance and potential inability to adjust after prolonged use. Fourthly, there is a lack of precise position feedback and control. Existing flexible supports mainly rely on manual adjustment and mechanical limits, lacking precise position detection and a closed-loop control system, making it difficult to achieve high-precision automated positioning and adjustment. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a modular and reconfigurable flexible measurement support and its combination system to solve the technical problems of poor versatility, limited adjustment range, high cost and large storage space occupation of existing measurement supports.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a modular and reconfigurable flexible measuring support, comprising a base frame and a flexible support. The base frame has multiple mounting holes arranged in a predetermined array. The flexible support is detachably mounted on the base frame. The flexible support includes a base, a Z-axis lifting mechanism, an XY-axis displacement platform, and a position accuracy feedback system. The Z-axis lifting mechanism is disposed on the base and is used to drive the sliding support to move up and down along the Z-axis direction. The XY-axis displacement platform is disposed on the top of the sliding support and is used to achieve displacement adjustment in the X and Y axes. The position accuracy feedback system is used to detect the lifting position of the sliding support in real time and feed it back to the control system to achieve closed-loop control.

[0006] Furthermore, the mounting holes of the Base frame are arranged in a 100mm×100mm array, and each mounting hole is provided with a locking pin sleeve. The flexible support achieves rapid positioning and switching by cooperating with the locking pin sleeve through the locking positioning pin.

[0007] Furthermore, the Z-axis lifting mechanism includes a drive motor, a ball screw, and a screw nut mounted on the ball screw, all mounted on the base. The screw nut is fixedly connected to the sliding support. The drive motor drives the ball screw to rotate via a drive mechanism.

[0008] Furthermore, the drive mechanism includes a driving gear and a driven gear. The driving gear is mounted on the output shaft of the drive motor, and the driven gear is mounted on the ball screw and meshes with the driving gear.

[0009] Furthermore, it also includes a guiding mechanism, which includes linear slide rails symmetrically arranged on both sides of the sliding support and between the base, for guiding and limiting the lifting and lowering movement of the sliding support.

[0010] Furthermore, the position accuracy feedback system includes a grating ruler, a grating ruler reading terminal, and a control system. The grating ruler reading terminal is used to read the position information of the grating ruler. The control system receives the feedback signal from the grating ruler reading terminal and controls the operation of the drive motor.

[0011] Furthermore, it also includes protective devices, which include a dust cover disposed on the flexible support and a bellows cover disposed between the top of the base and the sliding support.

[0012] Furthermore, the XY-axis displacement platform can flexibly achieve micron-level precision displacement adjustment in both the X and Y axes.

[0013] A modular and reconfigurable flexible measurement support system includes at least one base frame and at least one flexible support, the number of which can be freely combined and configured according to the positioning requirements of the product under test.

[0014] Furthermore, the multiple flexible supports can quickly switch positions through the array of mounting holes on the Base frame, and each flexible support can independently adjust its height and XY axis position to form the positioning and clamping posture required for the corresponding product.

[0015] Furthermore, the upper surface of the flexible support can be replaced with non-standard supports of different specifications to match the positioning requirements of different products.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] (1) The present invention adopts a modular design. The Base frame and flexible support can be freely combined. Different products only need to adjust the number, position and height of the flexible support to achieve positioning. There is no need to make a special bracket for each new product, which greatly reduces the cost of use by up to 85%.

[0018] (2) In this invention, the flexible support adopts a ball screw lifting mechanism driven by a motor and a closed-loop feedback of a grating ruler to achieve precise automatic lifting control in the Z-axis direction. The adjustment range is large and the precision is high, reaching the micron level.

[0019] (3) In this invention, the XY axis displacement platform can achieve micron-level precision adjustment in the X and Y directions. Combined with the array mounting holes on the Base frame, it can achieve large step size and fast switching, taking into account the needs of large-range adjustment and precise positioning.

[0020] (4) In this invention, the array mounting holes on the Base frame, together with the locking pin sleeve, can realize the rapid positioning and switching of the flexible support, thereby improving the efficiency of changing between different products.

[0021] (5) The present invention can meet the measurement needs of a variety of products with a small number of flexible supports, which greatly reduces the storage space occupied by the measuring bracket. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the modular and reconfigurable flexible measuring support of the present invention;

[0023] Figure 2 This is a schematic diagram of the flexible support structure;

[0024] Figure 3 A schematic diagram of the sliding support and linear guide rail structure;

[0025] Figure 4 This is a structural diagram of the base.

[0026] In the diagram: 1-Base frame; 101-Frame body; 102-Mounting hole; 103-Locking pin sleeve; 2-Flexible support; 201-Drive motor; 202-Driving gear; 203-Driven gear; 204-Ball screw; 205-Linear slide rail; 206-Sliding support; 207-Screw nut; 208-XY axis displacement platform; 209-Grammeter ruler; 210-Bell cover; 211-Dustproof cover; 212-Handle; 213-Bearing seat; 214-Bearing; 215-Connecting plate; 216-Mounting plate; 217-Grammeter ruler reading port; 3-Base; 301-Base plate; 302-Channel-shaped vertical wall; 303-Handle; 304-Spring handle; 305-Fixing block; 306-Connecting hole. Detailed Implementation

[0027] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0028] like Figure 1 As shown, this invention provides a modular, reconfigurable, flexible measurement support, comprising at least one base frame 1 and at least one flexible support 2. The number of base frames 1 and flexible supports 2 can be freely combined according to the positioning requirements of the product being measured. This modular design allows the invention to be flexibly configured according to the positioning needs of different products, achieving a one-to-many measurement function.

[0029] The base frame 1 is mainly composed of a frame body 101 and locking pin sleeves 103. Mounting holes 102 are arranged in an array at predetermined intervals on the frame body 101. In a preferred embodiment, the mounting holes 102 are distributed in a 100mm × 100mm array. Locking pin sleeves 103 are disposed within the mounting holes 102 and are used to cooperate with locking positioning pins to achieve rapid positioning and connection of the flexible support 2 on the base frame 1. By arranging a locking pin sleeve 103 every 100mm, in conjunction with the flexible support 2, rapid positioning and switching can be achieved. This array-type hole design provides both a large-step position adjustment capability and ensures repeatability of positioning accuracy.

[0030] like Figure 2 , Figure 3 and Figure 4 As shown, the flexible support 2 includes a base 3 and a sliding support 206. The base 3 includes a base plate 301 and a channel-shaped vertical wall 302. The base plate 301 is provided with a connecting hole 306 for fixing the base 3 to the workbench or the Base frame 1. The vertical wall 302 of the base 3 is also provided with a handle 303 and a spring handle 304 for easy movement and handling.

[0031] The Z-axis lifting mechanism is mounted on the base 3. Specifically, the base 3 is equipped with a drive motor 201 and a ball screw 204. A drive gear 202 is mounted on the output shaft of the drive motor 201, which drives a driven gear 203 mounted on the ball screw 204, thereby rotating the ball screw 204. Bearing seats 213 are mounted on the base plate 301 and the vertical wall 302 of the base 3. Bearings 214 are installed inside the two bearing seats 213, and both ends of the ball screw 204 are mounted within the bearings 214. A screw nut 207 is mounted on the ball screw 204, and the screw nut 207 has a connecting plate 215.

[0032] The guiding mechanism includes linear slide rails 205 and sliding supports 206. The sliding supports 206 are mounted on the connecting plate 215 of the lead screw nut 207. The linear slide rails 205 are symmetrically arranged on both sides of the sliding supports 206 between them and the grooved vertical walls 302 of the base 3. The sliding supports 206 are guided and limited by the linear slide rails 205 on both sides, and move up and down on the base 3 to ensure the positional accuracy and direction of the mechanism's movement.

[0033] The sliding support 206 has a mounting plate 216 on its top, and an XY axis displacement platform 208 is mounted on the mounting plate 216. The XY axis displacement platform 208 is existing technology and can realize micron-level displacement adjustment in the X and Y axis directions to meet the requirements of precision positioning.

[0034] The position accuracy information feedback system includes a grating ruler 209 mounted on the sliding support 206, a grating ruler reading dock 217 mounted on the vertical wall 302 of the base 3, and a control system. The grating ruler reading dock 217 is mounted on the grooved vertical wall 302 of the base 3 via a fixing block 305. The grating ruler 209 ensures high-precision Z-axis lifting displacement of the flexible measuring bracket, can detect the lifting position in real time and feed it back to the control system, and works with the encoder of the drive motor to achieve closed-loop precise control.

[0035] The protective device includes a dust cover 211 installed on the flexible measuring bracket to protect the drive motor 201 and transmission gears. In addition, a bellows cover 210 is provided between the top of the base 3 and the mounting plate 216 to prevent dust and debris from entering the lifting mechanism and ensure the accuracy and reliability of long-term use.

[0036] The working principle of this invention is as follows: When the height of the flexible support 2 needs to be adjusted, the operator first powers on the drive motor 201 mounted on the base 3, then inputs the desired height through the computer interface. The control system automatically sends a command to the drive motor 201. The drive motor 201 drives the active gear 202 to rotate, which in turn causes the ball screw 204 to rotate through the driven gear 203. The engagement between the ball screw 204 and the screw nut 207 converts the rotational motion into the vertical linear motion of the sliding support 206. As the ball screw 204 rotates, the screw nut 207 mounted on the ball screw 204 drives the sliding support 206 to move smoothly up and down along the linear guide rails 205 on both sides of the base 3 via its connecting plate 215. During this process, the grating ruler 209 and the grating ruler reading dock 217 read the precise position information of the sliding support 206 in real time and feed it back to the control system, thereby achieving closed-loop precise control. After reaching the specified height, the drive motor 201 stops moving and locks its position. At this point, the operator can disconnect the power and install the flexible support 2 onto the corresponding workbench (Base frame 1) for use.

[0037] The flexible support 2 can be used as a standard structure. Only non-standard supports need to be made on the upper surface of the flexible support 2 (i.e., the top surface of the XY-axis displacement platform 208) to match different products. By placing the flexible support 2 at different positions on the Base frame 1 and adjusting it to different heights, it can be combined to form the positioning and clamping posture required by the corresponding product. Users only need to make a few parts to complete the positioning of different products, which reduces costs and minimizes the footprint.

[0038] This invention achieves flexible adjustment in three aspects: First, it enables rapid switching of large step sizes (100mm step size) in the X and Y directions through the array mounting holes 102 on the Base frame 1; second, it enables micron-level precision fine-tuning in the X and Y directions through the XY-axis displacement platform 208; and third, it enables large-range precision lifting and lowering adjustment in the Z-axis direction through a motor-driven ball screw in conjunction with a closed-loop control system using a grating ruler. The combination of these three adjustment methods allows the flexible measuring bracket of this invention to adapt to various vehicle models and sizes of the products being measured.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A modular, reconfigurable, flexible measuring support, characterized in that, The system includes a base frame (1) and a flexible support (2). The base frame (1) has multiple mounting holes (102) arranged in a predetermined spacing array. The flexible support (2) is detachably mounted on the base frame (1). The flexible support (2) includes a base (3), a Z-axis lifting mechanism, an XY-axis displacement platform (208), and a position accuracy feedback system. The Z-axis lifting mechanism is located on the base (3) and is used to drive the sliding support (206) to rise and fall along the Z-axis direction. The XY-axis displacement platform (208) is located on the top of the sliding support (206) and is used to realize displacement adjustment in the X and Y axes. The position accuracy feedback system is used to detect the rising and falling position of the sliding support (206) in real time and feed it back to the control system to realize closed-loop control.

2. The modular reconfigurable flexible measuring bracket according to claim 1, characterized in that: The mounting holes (102) of the Base frame (1) are arranged in a 100mm×100mm array, and each mounting hole (102) is provided with a locking pin sleeve (103). The flexible support (2) achieves rapid positioning and switching by cooperating with the locking pin sleeve (103) through the locking positioning pin.

3. The modular reconfigurable flexible measuring bracket according to claim 1, characterized in that, The Z-axis lifting mechanism includes a drive motor (201), a ball screw (204), and a screw nut (207) mounted on the ball screw (204) on the base (3). The screw nut (207) is fixedly connected to the sliding support (206). The drive motor (201) drives the ball screw (204) to rotate through the drive mechanism.

4. The modular reconfigurable flexible measuring bracket according to claim 1, characterized in that, It also includes a guide mechanism, which includes linear slide rails (205) symmetrically arranged on both sides of the sliding support (206) and between the base (3), for guiding and limiting the lifting and lowering movement of the sliding support (206).

5. The modular reconfigurable flexible measuring bracket according to claim 1, characterized in that, The position accuracy feedback system includes a grating ruler (209), a grating ruler reading terminal (217), and a control system. The grating ruler reading terminal (217) is used to read the position information of the grating ruler (209). The control system receives the feedback signal from the grating ruler reading terminal (217) and controls the operation of the drive motor (201).

6. The modular reconfigurable flexible measuring bracket according to claim 1, characterized in that, It also includes protective devices, which include a dust cover (211) disposed on the flexible support (2) and a bellows cover (210) disposed between the top of the base (3) and the sliding support (206).

7. The modular reconfigurable flexible measuring bracket according to claim 1, characterized in that: The XY axis displacement platform (208) can flexibly realize micron-level displacement adjustment in both the X and Y axes.

8. A modular, reconfigurable, flexible measurement support assembly system, characterized in that, It includes at least one base frame (1) and at least one flexible support (2) as described in any one of claims 1 to 7, wherein the number of the base frame (1) and the flexible support (2) can be freely combined and configured according to the positioning requirements of the product under test.

9. The modular reconfigurable flexible measurement support assembly system according to claim 8, characterized in that: Multiple flexible supports (2) can quickly switch positions through the array of mounting holes (102) on the Base frame (1). Each flexible support (2) can independently adjust its height and XY axis position to form the positioning and clamping posture required for the corresponding product.

10. The modular reconfigurable flexible measurement support assembly system according to claim 8, characterized in that: The upper surface of the flexible support (2) can be replaced with non-standard supports of different specifications to match the positioning requirements of different products.

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