Search

CN-121655817-B - Torsion bar detects frock and automated inspection equipment

CN121655817BCN 121655817 BCN121655817 BCN 121655817BCN-121655817-B

Abstract

The invention discloses a torsion bar detection tool and automatic detection equipment. The tool comprises a fixing assembly and a torsion detection assembly. The fixing assembly is folded through two fixing blocks with half tooth grooves to form a first tooth groove meshed with the first tooth part of the torsion bar, so that reliable fixing is realized. The torsion detection assembly comprises a torsion block rotatably assembled on the mounting seat, and the torsion block is provided with a second tooth slot capable of being radially assembled into the second tooth part of the torsion bar and a radially extending lever arm. The mounting seat is provided with a detection module and a driving module which respectively act on two ends of the lever arm. The driving module drives the lever arm to drive the torsion block to rotate, and the detection module accurately obtains the torsion angle by measuring the displacement of the lever arm and converting the displacement based on the lever ratio. The fixture is rapid in clamping, reliable in positioning and high in detection precision. Corresponding automation equipment has integrated this frock, has realized torsion bar from automatic feeding, correction, function detection, outward appearance retest to intelligent sorting's full-flow automation.

Inventors

  • YANG DIYU
  • ZHANG XINGJIE
  • LIN WEIXIN
  • OUYANG LINHUI
  • WANG LU
  • Pang Canmei

Assignees

  • 宁波敏达汽车科技股份有限公司

Dates

Publication Date
20260508
Application Date
20260209

Claims (7)

  1. 1. Torsion bar detects frock for carry out torsion angle to torsion bar (700), treat stiff end (710) of torsion bar (700) and be equipped with first tooth portion (711), treat torsion end (720) and be equipped with second tooth portion (721), its characterized in that includes: The fixing assembly is used for fixing the to-be-fixed end (710) of the torsion bar (700) and comprises a first fixing block (410) and a second fixing block (420), semicircular half tooth grooves (411) are respectively arranged on the first fixing block (410) and the second fixing block (420), two groups of half tooth grooves (411) are folded to form a complete first tooth groove, and the first tooth groove is meshed with the first tooth part (711) to limit rotation and tilting of the torsion bar (700); The torsion detection assembly is used for clamping and twisting a to-be-twisted end (720) of the torsion bar (700) and comprises a mounting seat (440), a torsion block (450) is rotatably assembled on the mounting seat (440), a second tooth groove (451) matched with the shape of a second tooth part (721) is arranged on the torsion block (450), and the second tooth groove (451) is opened along the direction perpendicular to the axis of the torsion bar (700) so as to be radially assembled into the second tooth part (721); The device comprises a torsion block (450), a mounting seat (440), a detection module (470) and a driving module (480), wherein a lever arm (460) extending along the radial direction is fixedly arranged on the torsion block (450), the lever arm (460) takes the rotation center of the torsion block (450) as a fulcrum, the mounting seat (440) is provided with the detection module (470) and the driving module (480), the detection module (470) comprises a measuring rod (471) which can stretch out and draw back elastically, the driving module (480) comprises a driving rod (481), and the measuring rod (471) and the driving rod (481) respectively lean against two ends of the lever arm (460); The first fixing block (410) is arranged on the mounting seat (440), so that during detection, the mounting seat (440) is driven to move downwards, clamping of the to-be-fixed end (710) of the torsion bar (700) and loading of the to-be-twisted end (720) can be synchronously completed, the torsion block (450) is connected with the mounting seat (440) through a reset elastic piece, and the reset elastic piece is used for resetting the torsion block (450) to an initial angle position enabling the measuring bar (471) to be in an initial compression state under a non-detection state.
  2. 2. A torsion bar inspection tool according to claim 1, wherein the distance L from the contact point of the measuring rod (471) and the contact point of the driving rod (481) to the rotation center is equal, and the ratio of the distance L to the maximum inner diameter R of the second tooth slot (451) satisfies 3 < L/R < 10.
  3. 3. The automatic detection equipment is characterized by comprising a base station (100), wherein a conveying frame body (200) is assembled on the base station (100), a conveying belt (210) is assembled on the conveying frame body (200), positioning grooves (211) for accommodating torsion bars (700) are distributed on the conveying belt (210) at equal intervals along the conveying direction, and the conveying direction along the conveying belt (210) is sequentially provided with: a positioning mechanism (300) for adjusting the circumferential attitude of the torsion bar (700); Torsion bar detection mechanism (400) comprising a torsion bar detection tool according to any one of claims 1-2 for torsion angle detection of a torsion bar (700); a torsion abnormality detection mechanism (500) for detecting the appearance and deformation of the torsion bar (700) for which torsion angle detection is completed; And the blanking sorting mechanism (600) is used for sorting and blanking the torsion bar (700) according to the detection result.
  4. 4. An automated inspection apparatus according to claim 3, wherein the righting mechanism (300) comprises a righting toothed plate (310) located above the conveyor belt (210), the surface of the righting toothed plate (310) facing the conveyor belt (210) being provided with righting tooth slots (311) engaging the first teeth (711).
  5. 5. An automated inspection apparatus according to claim 3, wherein the torsion bar inspection mechanism (400) further comprises a torsion mount (430) and a fixed mount (490); The torsion mounting frame (430) is provided with a lifting driving module (431), and the mounting seat (440) is connected with the lifting driving module (431); The upper top cylinder (491) is mounted on the fixed mounting frame (490), the second fixed block (420) is connected to the output end of the upper top cylinder (491), and a through groove (421) for the conveying belt (210) to pass through is formed in the second fixed block (420).
  6. 6. An automated inspection apparatus according to claim 3, wherein the torsion anomaly detection mechanism (500) comprises a first vision detection module (510) and a second vision detection module (520); The first visual detection module (510) is positioned right above the conveying belt (210) and is used for acquiring a top profile image of the torsion bar (700) so as to detect straightness and integral bending deformation of the torsion bar; The second visual detection module (520) is located at one side of the conveyor belt (210) close to the second tooth part (721) and is used for acquiring a side view image of the torsion bar (700) so as to detect end and side defects.
  7. 7. An automated inspection apparatus according to claim 3, wherein the blanking sort mechanism (600) comprises: A first blanking channel (610) arranged at the conveying end of the conveying belt (210) and used for receiving the qualified torsion bar (700); A second blanking channel (620) arranged on one side of the conveying belt (210) and used for receiving the disqualified torsion bar (700); and the pushing cylinder (630) is arranged at the other side of the conveying belt (210) opposite to the second blanking channel (620) and is used for transversely pushing out the unqualified torsion bar (700) to the second blanking channel (620).

Description

Torsion bar detects frock and automated inspection equipment Technical Field The invention belongs to the technical field of torsion bar rigidity detection, and particularly relates to a torsion bar detection tool and automatic detection equipment. Background Torsion bar is used as a key bearing and elastic element in automobile suspension, engineering machinery and other systems, and the torsional rigidity is a core index for measuring the performance and reliability of the torsion bar. In the manufacturing process, a specified torque must be applied to the torsion bar and the torsion angle produced by the torsion bar must be accurately measured to determine whether the stiffness is acceptable. In the conventional detection method, a simple tool is used, for example, a vice is used to fix one end, torque is manually applied to the other end, and a universal measuring tool is used to measure the angle. The method is low in efficiency and poor in repeatability, clamping is unreliable, sliding or warping is easy to generate in the test, and large errors are introduced, so that the requirements of modern industry on precision and efficiency cannot be met. In order to overcome the defects and improve the detection precision, a more special detection scheme is developed in the industry. One typical scheme is to adopt two groups of independent clamping blocks with tooth grooves, and the clamping blocks are respectively meshed with a first tooth part to be fixed and a second tooth part to be twisted at two ends of the torsion bar. During detection, two ends of the torsion bar are respectively arranged into two groups of clamping blocks, then the clamping blocks at the ends to be twisted are driven to rotate, and the relative deflection angle between the two groups of clamping blocks is directly measured through a high-precision sensor (such as an encoder), and the angle is the torsion angle of the torsion bar. According to the method, accurate torque transmission and angle measurement without slippage are realized through tooth socket meshing, and the detection precision is obviously improved in principle. However, the scheme still has a prominent bottleneck in practical application, and severely restricts the popularization and application of the scheme. Firstly, the scheme has extremely high requirement on initial clamping and positioning, needs manual work or auxiliary equipment to accurately align the teeth at two ends of the torsion bar respectively and axially insert the teeth into the closed tooth grooves of the two groups of clamping blocks, and is complex in operation and long in beat time. Secondly, the whole detection flow (comprising feeding, aligning, clamping, testing and unloading) has high manual participation, and is difficult to realize beat synchronization and integration with an automatic production line. The scheme is mainly limited to laboratory spot check or off-line detection occasions, and the urgent requirements of the large-scale production line on full-check automation, high efficiency and high consistency cannot be met. Accordingly, the present application has been further designed and developed based on some of the above prior art. Disclosure of Invention In order to solve the technical problems, the invention is solved by the following technical scheme. The utility model provides a torsion bar detects frock for torsion bar carries out torsion angle and detects, the torsion bar wait that the stiff end is equipped with first tooth portion, wait to twist reverse the end and be equipped with second tooth portion, include: The fixing assembly is used for fixing the torsion bar to be fixed and comprises a first fixing block and a second fixing block, semicircular half tooth grooves are respectively arranged on the first fixing block and the second fixing block, a complete first tooth groove is formed after the two groups of half tooth grooves are folded, and the first tooth groove is meshed with the first tooth part to limit the rotation and tilting of the torsion bar; The torsion detection assembly is used for clamping and twisting the to-be-twisted end of the torsion bar and comprises a mounting seat, a torsion block is rotatably assembled on the mounting seat, a second tooth slot matched with the appearance of the second tooth part is arranged on the torsion block, and the second tooth slot is opened along the direction perpendicular to the axis of the torsion bar so as to be radially filled with the second tooth part; The device comprises a torsion block, a mounting seat, a detection module and a driving module, wherein the torsion block is fixedly provided with a lever arm extending along the radial direction, the lever arm takes the rotation center of the torsion block as a fulcrum, the mounting seat is provided with the detection module and the driving module, the detection module comprises an elastically telescopic measuring rod, the driving module comprises a driving rod, and the