An automatic detection instrument for the size of automobile steering gear synchronous pulleys

Abstract

The present invention relates to an automatic instrument for detecting the dimensions of synchronous pulleys for automotive steering gears, comprising a base and, mounted on the base, a dimension measurement station for detecting the dimensions of a workpiece being measured; a thread measurement station for detecting the threads of the workpiece being measured; a workpiece conveying mechanism for conveying the workpiece being measured from the previous process to the corresponding station; a material discharge mechanism for conveying the workpiece after inspection; and a material gripping mechanism for sequentially transferring the workpiece from the conveying mechanism to the dimension measurement station, thread measurement station, and material discharge mechanism. Compared to existing three-coordinate measurement and manual measurement technologies, this instrument improves measurement cycle and accuracy, integrates multi-station measurement into a single device, and provides a strong guarantee for the promotion of industrial automation in enterprises.

Description

Technical Field

[0001] The invention relates to the technical field of automobile component measurement, in particular to an automatic detection instrument for the size of a synchronous pulley of an automobile steering gear. Background Art

[0002] The synchronous pulley in an automobile steering gear plays a key role in transmission and is a key component in the entire system. The pulley's size is determined by first combining it with a nut and then meshing with the rack. Existing methods for testing it, both domestically and internationally, rely on manual measurement using a combination of internal and external diameter micrometers and, for some, three-coordinate coordinate measurement for tolerances. This approach is inefficient and inaccurate, leading to misleading data during batch processing and impacting orderly production. Few self-developed synchronous pulley testing methods exist on the market, and most remain at the initial stage of upgrading manual testing methods. Manual measurement is limited to individual requirements for individual products, requiring high levels of worker proficiency and subsequent manual judgment, processing, and analysis, resulting in no significant improvement in performance. Summary of the Invention

[0003] The purpose of the present invention is to provide an automatic detection instrument for the size of a synchronous pulley of an automobile steering gear in order to overcome the defects of the above-mentioned existing measurement technology.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] An automatic detection instrument for the size of a synchronous pulley of an automobile steering gear comprises a base and:

[0006] Dimension measurement station, used for dimension detection of workpiece;

[0007] Thread measuring station, used for thread detection of workpiece;

[0008] Workpiece conveying mechanism, used to convey the workpiece to be measured in the previous process to the corresponding workstation;

[0009] Unloading mechanism, used for conveying the workpiece after inspection;

[0010] The material grabbing mechanism is used to transfer the workpiece from the conveying mechanism to the size measuring station, the thread measuring station and the unloading mechanism in sequence.

[0011] Furthermore, the dimension measuring station is provided with a rotary measuring mechanism, comprising:

[0012] The positioning bearing unit includes a dimension measuring station base plate, a reference ring mounted on the dimension measuring station base plate, and a tray mounted on the upper portion of the reference ring. The reference ring is provided with a sensor assembly, and the lower portion of the reference ring is provided with a rotatable reference surface. During testing, the workpiece to be measured is placed on the reference surface.

[0013] The lifting and pressing unit includes an upper connecting plate, a jumping elastic block vertical plate installed at the bottom of the upper connecting plate, and an end face pressing mechanism. The upper connecting plate is installed on a sliding support frame in a lifting manner. The bottom of the upper connecting plate and the side of the jumping elastic block vertical plate are provided with a sensor assembly.

[0014] The measuring rotation drive unit is provided with a rotatable roller.

[0015] Furthermore, the end face clamping mechanism includes a bearing pressing block installed at the lower part of the upper connecting plate through a connecting rod, and a guide block is provided at the lower part of the bearing pressing block. During testing, the guide block is inserted into the synchronous pulley, and the lower end of the bearing pressing block is pressed against the upper end of the synchronous pulley;

[0016] Furthermore, the measuring rotation drive unit includes a linear rail plate, a linear rail mounting block mounted on the linear rail plate, a linear rail mounted on the linear rail mounting block, a slider slidably mounted on the linear rail, and a mounting plate mounted on the slider.

[0017] A roller for driving the measured workpiece to rotate is provided at the front end of the mounting plate, and the roller transmission is connected to the motor; a cylinder bracket is installed on the linear rail plate, a cylinder is installed on the cylinder bracket, a spring sleeve is installed at the front end of the output shaft of the cylinder, a floating seat is provided on the mounting plate, the spring sleeve passes through the floating seat, and a spring is sleeved on the spring sleeve between the floating seat and the output shaft of the cylinder.

[0018] Furthermore, the thread measuring station includes:

[0019] A positioning base unit, comprising a positioning panel and a plurality of clamping claws provided at the lower portion of the positioning panel;

[0020] The thread gauge measuring unit includes a thread gauge, which is installed at the lower part of a floating chuck, and the floating chuck is installed at the lower part of a sliding rod. The upper part of the sliding rod is connected to a driving motor through a rotating floating rod. The thread gauge measuring unit is installed on a bracket in a liftable manner through a slide.

[0021] Furthermore, the workpiece conveying mechanism includes a loading movable material channel and a servo material moving device, and the loading movable material channel is perpendicular to the material conveying direction of the servo material moving device;

[0022] The feeding motorized conveyor is a chain-type conveying mechanism;

[0023] The servo material moving device includes a servo slide, a servo slide connecting plate slidably mounted on the upper portion of the servo slide, a liftable bracket is provided on the servo slide connecting plate, and a clamping claw is provided at the front end of the bracket.

[0024] Furthermore, the unloading mechanism includes a qualified part unloading channel and a unqualified part unloading channel, the qualified part unloading channel and the unqualified part unloading channel are parallel to each other, and both the qualified part unloading channel and the unqualified part unloading channel are belt conveying mechanisms.

[0025] Furthermore, the material grabbing mechanism includes a material grabbing mechanism base, a slide seat installed on the material grabbing mechanism base, and a gripper assembly slidably installed on the slide seat.

[0026] Furthermore, a protective cover is provided on the upper portion of the base, and the detection instrument is also provided with an SPC analysis system and an electric control cabinet with an electric control system.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] 1. The current detection can only perform preliminary measurement on a single workpiece, which requires high workers and operating proficiency. The instrument of the present invention improves the measurement cycle and measurement accuracy, providing a strong guarantee for the promotion of industrial automation in enterprises.

[0029] 2. This testing instrument can perform batch measurements more quickly and effectively. It can flexibly and freely use all specifications of the steering gear synchronous pulley through adjustment and switching, which effectively guarantees the automation and quality monitoring of the production enterprise.

[0030] 3. The present invention can realize high-precision automatic detection of synchronous pulleys by setting up a size measurement station and a thread measurement station. The data is collected by the inductive sensor and transmitted to the computer SPC control and analysis system. The SPC analysis system gives the measured value of the measured parameter through calculation and displays it on the display, thus completing the test work efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the overall external structure of the detection instrument of the present invention;

[0032] Figure 2 Schematic diagram of the overall internal structure of the detection instrument of the present invention;

[0033] Figure 3 It is a structural diagram of the dimension measurement station;

[0034] Figures 4-6 This is a schematic diagram of the local structure of the dimension measurement station;

[0035] Figure 7 Schematic diagram of the structure of the measurement rotation drive unit;

[0036] Figure 8 It is a structural diagram of the thread measuring station;

[0037] Figure 9This is a schematic diagram of the local structure of the thread measuring station;

[0038] Figure 10 This is a structural diagram of the feeding motorized material channel;

[0039] Figure 11 It is a structural diagram of the servo material transfer device;

[0040] Figure 12 It is a structural diagram of the material grabbing mechanism;

[0041] Figure 13 This is a structural diagram of the qualified parts discharge channel;

[0042] Figure 14 This is a structural diagram of the unloading channel for unqualified parts. DETAILED DESCRIPTION

[0043] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] like Figure 1 、 2 An automatic detection instrument for the size of a synchronous pulley of an automobile steering gear includes a base 100 and, mounted on the base 100, a size measuring station 200 for detecting the size of a workpiece to be measured; a thread measuring station 300 for detecting the threads of the workpiece to be measured; a workpiece conveying mechanism 400 for conveying the workpiece to be measured from the previous process to the corresponding station; a feeding mechanism 500 for conveying the workpiece to be measured after measurement; and a gripping mechanism 600 for sequentially transferring the workpiece from the conveying mechanism to the size measuring station 200, the thread measuring station 300, and the feeding mechanism 500. A protective cover is provided on the upper part of the base 100. The detection instrument is also equipped with an SPC analysis system and an electric control cabinet with an electrical control system. The electric control cabinet dominates the transmission, measurement, judgment and other linkage structures of the entire instrument and can display alarm information in a timely manner.

[0045] like Figures 3 to 7 , the dimension measuring station 200 is a rotary measuring mechanism, including:

[0046] The positioning and carrying unit 201 includes a dimension measurement station base plate 2011, a reference ring 2012 mounted on the dimension measurement station base plate 2011, and a tray 2013 mounted on the upper portion of the reference ring 2012. The reference ring 2012 is provided with a sensor assembly, and the lower portion of the reference ring is provided with a rotatable reference surface 2014. During testing, the workpiece to be measured is placed on the reference surface 2014.

[0047] The lifting and pressing unit 202 includes an upper connecting plate 2021, a jumping elastic block vertical plate 2022 installed at the bottom of the upper connecting plate 2021, and an end face pressing mechanism. The upper connecting plate 2021 is installed on a sliding support frame in a lifting manner. Sensor components are provided at the bottom of the upper connecting plate 2021 and the side of the jumping elastic block vertical plate 2022.

[0048] The measuring rotation driving unit 203 is provided with a rotatable roller 2033 .

[0049] like Figure 6 The end face clamping mechanism includes a bearing pressure block 2024 installed at the lower part of the upper connecting plate 2021 through a connecting rod 2023. A guide block 2025 is provided at the lower part of the bearing pressure block 2024. During testing, the guide block is inserted into the synchronous pulley, and the lower end of the bearing pressure block is pressed on the upper end of the synchronous pulley.

[0050] like Figure 7 The measuring rotation drive unit 203 includes a linear rail plate 2031, a linear rail mounting block installed on the linear rail plate 2031, a linear rail installed on the linear rail mounting block, a slider slidably installed on the linear rail, and a mounting plate 2032 installed on the slider; a roller 2033 for driving the workpiece to be measured to rotate is provided at the front end of the mounting plate 2032, and the roller 2033 is connected to the motor; a cylinder bracket is installed on the cylinder bracket, a cylinder is installed on the cylinder bracket, a spring sleeve 2034 is installed at the front end of the output shaft of the cylinder, a floating seat 2035 is provided on the mounting plate, the spring sleeve 2034 passes through the floating seat 2035, and a spring is sleeved on the spring sleeve between the floating seat and the output shaft of the cylinder.

[0051] like Figure 8 The thread measuring station 300 includes: a positioning base unit, including a positioning panel 301, and a plurality of clamping jaws 302 arranged at the lower part of the positioning panel 301; a thread gauge measuring unit, including a thread gauge 303, the thread gauge 303 is installed at the lower part of a floating chuck 304, the floating chuck 304 is installed at the lower part of a sliding rod 305, the upper part of the sliding rod 305 is connected to the driving motor 307 through a rotating floating rod 306, and the thread gauge measuring unit is installed on the bracket in a liftable manner through a slide.

[0052] The core component of the dimensional measurement station consists of nine sets of inductive measuring probes, integrated with the software. These probes can be used for both single and simultaneous inspections, and the system can be freely switched to match the corresponding product specifications. During testing, once the dimensional measurement station determines that the workpiece is in place, a pneumatic carriage lowers the workpiece, with the workpiece facing downwards. The probes are driven by a pneumatic slide into the measurement position. A rotary motor rotates the workpiece one full revolution through the end face hexagon to detect various parameters. Once the measurement is complete, the slide retracts, the pneumatic carriage raises the workpiece, and the material handling robot grabs the workpiece and moves it to the thread measurement station. There, the pneumatic carriage lowers the workpiece, positioning it by its end face and outer diameter. A go gauge is placed on top of the workpiece, rotated and lowered by the motor, and screwed into the internal thread. If the tightening force is too high, the go gauge retracts, resulting in a failure. After the measurement is complete, the slide retracts, the pneumatic carriage raises the workpiece, and the material handling robot grabs the workpiece and moves it to the corresponding unloading station. The collected data is transmitted to the computer SPC software on the operation panel for analysis.

[0053] like Figure 10 、 11 The workpiece conveying mechanism 400 includes a loading manifold 401 and a servo material transfer device 402. The loading manifold 401 is perpendicular to the material transfer direction of the servo material transfer device. The loading manifold 401 is a chain-type conveying mechanism. The servo material transfer device 402 includes a servo slide and a servo slide connecting plate slidably mounted on the servo slide. The servo slide connecting plate is equipped with a liftable bracket with a clamping claw at the front end. The loading manifold can hold products to be inspected, facilitating subsequent rapid transfer.

[0054] like Figure 13 、 14 The unloading mechanism 500 includes a qualified parts unloading channel 501 and a rejected parts unloading channel 502. These channels are parallel and both are belt-type conveyors. The qualified parts unloading channel can carry a maximum of 20 qualified parts, allowing approximately 20 minutes of unloading time for each part, which may vary slightly. This facilitates a one-person multi-tasking system. The rejected parts unloading channel is a temporary storage area for rejected parts removed from inspection. It effectively distinguishes between qualified and rejected parts and features special anti-theft protection, ensuring that rejected parts can only be retrieved by designated personnel, thus facilitating quality control.

[0055] Based on the measurement results, the qualified parts unloading channel at the dimensional measurement station and the thread measurement station is the placement area for qualified parts after measurement. The qualified parts unloading channel can hold 20 workpieces, and qualified workpieces are manually removed and packed into boxes. Based on the measurement results, the unqualified parts unloading channel at the dimensional measurement station and the thread measurement station is the placement area for unqualified parts after measurement. The unqualified parts unloading channel can hold 10 workpieces. When 9 unqualified parts are unqualified, the equipment will alarm. When the 10th part is unqualified, the detection instrument will stop working and the sound and light alarm will be triggered.

[0056] like Figure 12 The material grabbing mechanism 600 includes a material grabbing mechanism base, a slide seat installed on the material grabbing mechanism base, and a gripper assembly slidably installed on the slide seat.

[0057] The above description of the embodiments is intended to facilitate understanding and use of the invention by those skilled in the art. It will be apparent that those skilled in the art can readily make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the present invention is not limited to the above-described embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of the present invention, without departing from the scope of the present invention, should be within the scope of protection of the present invention.

Claims

1. An automatic detection instrument for the size of a synchronous pulley of an automobile steering gear, characterized in that: It comprises a base (100) and mounted on the base (100): A dimension measuring station (200) is used for dimension detection of a workpiece to be measured; A thread measuring station (300) is used for detecting the threads of a workpiece to be measured; A workpiece conveying mechanism (400) is used to convey the workpiece to be measured in the previous process to the corresponding workstation; A material unloading mechanism (500) is used for conveying the workpiece after inspection; A material grabbing mechanism (600) is used to sequentially transfer the workpiece from the conveying mechanism to the size measuring station (200), the thread measuring station (300) and the material unloading mechanism (500); The size measuring station (200) is a rotary measuring mechanism, comprising: A positioning bearing unit (201) comprises a dimension measuring station base plate (2011), a reference ring (2012) mounted on the dimension measuring station base plate (2011), and a tray (2013) mounted on the upper portion of the reference ring (2012); a sensor assembly is provided on the reference ring (2012); a rotatable reference surface (2014) is provided at the lower portion of the reference ring; and during testing, the workpiece to be measured is placed on the reference surface (2014); The lifting and pressing unit (202) comprises an upper connecting plate (2021), a jumping elastic block vertical plate (2022) installed at the bottom of the upper connecting plate (2021), and an end face pressing mechanism. The upper connecting plate (2021) is installed on a sliding support frame in a lifting manner. Sensor components are provided at the bottom of the upper connecting plate (2021) and the side of the jumping elastic block vertical plate (2022). A measuring rotation drive unit (203) is provided with a rotatable roller (2033); The end face pressing mechanism comprises a bearing pressing block (2024) mounted on the lower part of the upper connecting plate (2021) via a connecting rod (2023), and a guide block (2025) is provided on the lower part of the bearing pressing block (2024); The measuring rotation drive unit (203) comprises a linear rail plate (2031), a linear rail mounting block mounted on the linear rail plate (2031), a linear rail mounted on the linear rail mounting block, a slider slidably mounted on the linear rail, and a mounting plate (2032) mounted on the slider; A roller (2033) for driving the measured workpiece to rotate is provided at the front end of the mounting plate (2032), and the roller (2033) is connected to a motor in a transmission manner; A cylinder bracket is mounted on the linear rail plate, a cylinder is mounted on the cylinder bracket, a spring sleeve (2034) is mounted on the front end of the output shaft of the cylinder, a floating seat (2035) is provided on the mounting plate, the spring sleeve (2034) passes through the floating seat (2035), and a spring is sleeved on the spring sleeve between the floating seat and the output shaft of the cylinder; The thread measuring station (300) comprises: A positioning base unit comprising a positioning panel (301) and a plurality of clamping claws (302) provided at the lower portion of the positioning panel (301); A thread gauge measuring unit comprises a thread gauge (303), wherein the thread gauge (303) is mounted on the lower part of a floating chuck (304), the floating chuck (304) is mounted on the lower part of a sliding rod (305), the upper part of the sliding rod (305) is connected to a driving motor (307) via a rotating floating rod (306), and the thread gauge measuring unit is mounted on a bracket in a liftable manner via a slide.

2. The automatic detection instrument for the size of a synchronous pulley of an automobile steering gear according to claim 1 is characterized in that: The workpiece conveying mechanism (400) comprises a loading movable material channel (401) and a servo material moving device (402), wherein the loading movable material channel (401) is perpendicular to the material conveying direction of the servo material moving device; The loading motorized material channel (401) is a chain-type conveying mechanism; The servo material moving device (402) comprises a servo slide, a servo slide connecting plate slidably mounted on the upper portion of the servo slide, a liftable bracket being provided on the servo slide connecting plate, and a clamping claw being provided at the front end of the bracket.

3. The automatic detection instrument for the size of a steering gear synchronous pulley of an automobile according to claim 1, characterized in that: The unloading mechanism (500) comprises a qualified part unloading channel (501) and a unqualified part unloading channel (502), wherein the qualified part unloading channel (501) and the unqualified part unloading channel (502) are parallel to each other, and both the qualified part unloading channel and the unqualified part unloading channel are belt-type conveying mechanisms.

4. The automatic detection instrument for the size of a synchronous pulley of an automobile steering gear according to claim 1 is characterized in that: The material grabbing mechanism (600) comprises a material grabbing mechanism base, a slide seat mounted on the material grabbing mechanism base, and a gripper assembly slidably mounted on the slide seat.

5. The automatic detection instrument for the size of a synchronous pulley of an automobile steering gear according to claim 1 is characterized in that: A protective cover is provided on the upper portion of the base (100).

6. The automatic detection instrument for the size of a steering gear synchronous pulley of an automobile according to claim 1, characterized in that: The detection instrument is also provided with an SPC analysis system and an electric control cabinet with an electric control system.

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