A kind of inspection fixture positioning mechanism capable of realizing automatic centering

Abstract

The present invention provides a gauge positioning mechanism capable of achieving automatic centering, comprising: an automatic centering module connected to the gauge; a first positioning module connected to the automatic centering module through a first connecting rod, comprising a first movable module and a first positioning block connected to the first movable module; and a second positioning module connected to the automatic centering module through a second connecting rod, comprising a second movable module and a second positioning block connected to the second movable module; wherein the first positioning module and the second positioning module have the same structure and are respectively located at the left and right ends of the automatic centering module, and when a part is clamped between the first positioning block and the second positioning block, the part is automatically centered on the gauge under the action of the automatic centering module. According to the present invention, it is achieved that the part can be automatically centered without adjustment after being installed on the gauge, which simplifies the operation of centering positioning adjustment, shortens the adjustment time, and improves the efficiency of gauge size measurement.

Description

Technical Field

[0001] The present invention relates to the field of positioning mechanisms, and more particularly to a gauge positioning mechanism capable of achieving automatic centering. Background Art

[0002] Gauges are a common tool for the development of automotive parts dimensions. The structural design of the gauge is directly related to the convenience of its operation and the efficiency of product dimension measurement. Centering is a way to select the Y-axis positioning strategy and is often used in tailgate products. The current design of the centering positioning module of the gauge often requires checking the percentage numbers on the left and right sides, and then manually adjusting the positioning modules on the left and right sides to achieve the final centering. This centering positioning design is mainly complicated to operate, requires multiple adjustments, and is time-consuming to center, which leads to low efficiency in product gauge dimension measurement.

[0003] Therefore, how to optimize the structural design, simplify the centering positioning adjustment operation, and improve the efficiency of gauge size measurement has become one of the issues that the current gauge design and development needs to face. Summary of the invention

[0004] The purpose of the present invention is to provide a gauge positioning mechanism capable of realizing automatic centering, thereby solving the problems of complicated operation, time-consuming and low measuring efficiency in the manual centering of gauge measurement in the prior art.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A gauge positioning mechanism capable of achieving automatic centering is provided, comprising: an automatic centering module connected to the gauge; a first positioning module connected to the automatic centering module via a first connecting rod, the first positioning module comprising a first movable module and a first positioning block connected to the first movable module; and a second positioning module connected to the automatic centering module via a second connecting rod, the second positioning module comprising a second movable module and a second positioning block connected to the second movable module; wherein the first positioning module and the second positioning module have the same structure and are respectively located at the left and right ends of the automatic centering module, and when a part is clamped between the first positioning block and the second positioning block, the part is automatically centered on the gauge under the action of the automatic centering module.

[0007] The first positioning module further includes a first fixing module connected to the first movable module via a guide rail, and the second positioning module further includes a second fixing module connected to the second movable module via a guide rail.

[0008] The automatic centering module includes: a third fixed module fixed relative to the inspection fixture, a third movable module connected to the third fixed module via a rotating shaft, and a power mechanism connecting the third fixed module with the third movable module and providing power to the third movable module, and the first connecting rod and the second connecting rod are respectively connected to the third movable module.

[0009] According to a preferred solution of the present invention, the power mechanism that provides power to the third movable module includes: a movable pin, and a spring that is sleeved on the movable pin and is always in a compressed state, one end of the movable pin is connected to the third fixed module, and the other end is connected to the third movable module.

[0010] According to another preferred solution of the present invention, the power mechanism providing power to the third movable module includes a motor, and the first positioning block and the second positioning block are provided with contact sensors, and the contact sensors are connected to the motor via a PCL module.

[0011] According to another preferred embodiment of the present invention, the first positioning module further includes: a first dial indicator installed at one end of the first positioning block, and the first positioning block is connected to the first movable module through a spring and a slidable pin; the second positioning module further includes: a second dial indicator installed at one end of the second positioning block, and the second positioning block is connected to the second movable module through a spring and a slidable pin; by manually adjusting the parts so that the readings of the first dial indicator and the second dial indicator are the same, the manual centering of the parts on the inspection fixture can also be achieved.

[0012] The first positioning block is connected to the first movable module via a guide groove, and the second positioning block is connected to the second movable module via a guide groove.

[0013] The position of the first positioning block relative to the first movable module is adjustable, and the position of the second positioning block relative to the second movable module is adjustable.

[0014] The position of the first positioning block relative to the first movable module can be locked by a first zero position pin, and the position of the second positioning block relative to the second movable module can be locked by a second zero position pin.

[0015] The position of the third movable module relative to the third fixed module can be locked by a third zero-position pin.

[0016] According to the present invention, a gauge positioning module with an automatic centering function is provided. Through the lever principle and the connecting rod structure design, automatic centering can be achieved without the need for adjustment after the part is installed on the gauge, thereby simplifying the centering positioning adjustment operation, shortening the adjustment time for the centering positioning of the part installed on the gauge, and improving the efficiency of the gauge size measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of a gauge positioning mechanism capable of achieving automatic centering provided according to a preferred embodiment of the present invention;

[0018] Figure 2 Yes Figure 1 A separate structural schematic diagram of the first positioning module shown;

[0019] Figure 3 Yes Figure 1 A separate structural schematic diagram of the second positioning module shown;

[0020] Figure 4 Yes Figure 1 A separate structural schematic diagram of the automatic centering module is shown;

[0021] Figure 5 Yes Figure 1 The schematic diagram of the use state of the inspection fixture positioning mechanism for automatically centering the tailgate of a car;

[0022] Figure 6 is a separate structural schematic diagram of a first positioning module according to another preferred embodiment of the present invention;

[0023] Figure 7 is a separate structural schematic diagram of a second positioning module according to another preferred embodiment of the present invention. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with specific examples. It should be understood that the following examples are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0025] like Figure 1 As shown, a gauge positioning mechanism 100 capable of realizing automatic centering is provided according to a preferred embodiment of the present invention, and mainly comprises: an automatic centering module 10 connected to the gauge; a first positioning module 30 connected to the automatic centering module 10 through a first connecting rod 20; and a second positioning module 50 connected to the automatic centering module through a second connecting rod 40; wherein the first positioning module 30 and the second positioning module 50 have the same structure and are respectively located at the left and right ends of the automatic centering module 10. When a part is clamped between the first positioning module 30 and the second positioning module 50, the part is automatically centered on the gauge under the action of the automatic centering module 10.

[0026] The lengths of the first connecting rod 20 and the second connecting rod 40 are completely equal, so as to achieve synchronous movement of the first positioning module 30 and the second positioning module 50 when centered. It should be understood that the lengths of the first connecting rod 20 and the second connecting rod 40 are designed based on the size of the part to be detected.

[0027] like Figure 2 As shown, the first positioning module 30 includes: a first fixed module 31, a first movable module 32 slidable relative to the first fixed module 31, and a first positioning block 33 connected to the first movable module 32. The first fixed module 31 and the first movable module 32 are connected by a guide rail 34, and the guide rail 34 provides a high-precision guide for the left and right sliding of the first movable module 32. The position of the first positioning block 33 relative to the first movable module 32 is adjustable. Specifically, the left and right adjustment of the first positioning block 33 can be achieved by rotating the bolt 35. When working, the first fixed module 31 fixes the entire first positioning module 30 on the inspection fixture frame by bolts and positioning pins. The inspection fixture frame refers to a bracket used to fix all positioning modules and detection modules.

[0028] The guide rail 34 and the first fixed module 31 can be fixedly connected by bolts combined with positioning pins. The first movable module 32 and the guide rail 34 are slidably connected by a C-shaped slot.

[0029] According to the preferred embodiment, the position of the first positioning block 33 relative to the first movable module 32 can be locked by the first zero position pin 36. When the first positioning block 33 is not in the zero position, it can be adjusted left and right by the bolt 35 until the first zero position pin 36 can be inserted and locked. Specifically, the first movable module 32 and the first positioning block 33 are respectively designed with a hole matching the first zero position pin 36. When the positions of the two holes coincide, that is, the first zero position pin 36 can be inserted, the positioning surface on the first positioning block 33 is in the theoretical position. When the automatic centering positioning function is used, the first positioning block 33 is locked on the first movable module 32 by the first zero position pin 36 and cannot slide or adjust. Among them, the first connection point 1 is the connection position of the first connecting rod 20 and the first positioning module 30.

[0030] like Figure 3 As shown, the second positioning module 50 includes a second fixed module 51, a second movable module 52 slidable relative to the second fixed module 51, and a second positioning block 53 connected to the second movable module 52. The second fixed module 51 and the second movable module 52 are connected by a guide rail 54, and the guide rail 54 provides a high-precision guide for the left and right sliding of the second movable module 52. The position of the second positioning block 53 relative to the second movable module 52 is adjustable, and specifically, the left and right adjustment of the second positioning block 53 can be achieved by rotating the bolt 55. When working, the second fixed module 51 fixes the entire second positioning module 50 on the inspection fixture frame by bolts and positioning pins.

[0031] According to the preferred embodiment, the position of the second positioning block 53 relative to the second movable module 52 can be locked by the second zero position pin 56. When the second positioning block 53 is not in the zero position, it can be adjusted left and right by the bolt 55 until the second zero position pin 56 can be inserted and locked. Specifically, the second movable module 52 and the second positioning block 53 are respectively designed with a hole matching the second zero position pin 56. When the positions of the two holes coincide, that is, the second zero position pin 56 can be inserted, the positioning surface on the second positioning block 53 is in the theoretical position. When the automatic centering positioning function is used, the second positioning block 53 is locked on the second movable module 52 by the second zero position pin 56 and cannot slide or adjust. Among them, the second connection point 2 is the connection position between the second connecting rod 4 and the second positioning module 50.

[0032] like Figure 4 As shown, the automatic centering module 10 includes: a third fixed module 11 fixed relative to the gauge, a third movable module 13 connected to the third fixed module 11 through a rotating shaft 12, and a power mechanism for providing power to the third movable module 13. The first connecting rod 20 and the second connecting rod 40 are respectively connected to the third movable module 13 at the third connection point 3 and the fourth connection point 4. According to this preferred embodiment, the power mechanism for providing power to the third movable module 13 includes: a movable pin 14, and a spring 15 sleeved on the movable pin 14 and always in a compressed state, one end of the movable pin 14 is connected to the third fixed module 11, and the other end is connected to the third movable module 13 at the fifth connection point 3.

[0033] The position of the third movable module 13 relative to the third fixed module 11 can be locked by the third zero pin 16. When the third zero pin 16 is inserted, the automatic centering module is locked, and the first connecting rod 20 and the second connecting rod 40 are both immobile. The third movable module 13 and the third fixed module 11 are respectively designed with pin holes matching the third zero pin 16. When the two pin holes overlap, the third zero pin 16 can be inserted and locked, so that the third movable module 13 cannot rotate, and the locking is achieved. When the third zero pin 16 is locked, the spring 15 is in a compressed state. After the third zero pin 16 is pulled out, the compressed spring 15 will give the third movable module 13 a force to rotate around the rotating shaft 12. The third movable module 13 rotates and then drives the first positioning module 30 and the second positioning module 50 to slide toward the middle through the first connecting rod 20 and the second connecting rod 40 until the positioning surfaces on the first positioning block 33 and the second positioning block 53 fit the part, that is, the part is centered left and right in the Y direction on the inspection fixture.

[0034] According to the above preferred embodiment, a jig positioning mechanism 100 capable of achieving automatic centering is provided. When it is used for automatic centering of a car tailgate 200 on a jig, its working process is as follows: When it is necessary to calibrate the position of the centering positioning block, adjust the bolts 35 and 55 so that the first zero position pin 36 and the second zero position pin 56 can be inserted into the corresponding pin holes, and then insert the third zero position pin 16 into the locking automatic centering module 10, so that the first positioning block 33 and the second positioning block 53 can be calibrated through three coordinates. When measuring the part size normally, ensure that the first zero position pin 36 and the second zero position pin 56 are both in the inserted state and the third zero position pin 16 is in the pulled-out state before loading the part, and then install the car tailgate 200 on the jig, and shake the car tailgate 200 slightly to ensure that the positioning surfaces on the first positioning block 33 and the second positioning block 53 fit with the car tailgate 200, as shown in FIG. Figure 5 As shown, the part is centered in the Y direction on the inspection fixture.

[0035] It should be understood that the use of the automatic centering of a car tailgate on a check fixture is merely an example and not a limitation. In fact, the check fixture positioning mechanism 100 can also be applied to other parts.

[0036] According to another preferred embodiment of the present invention, the spring drive in the automatic centering module 10 can also be replaced with a motor drive, and contact sensors are respectively provided on the first positioning block 33 and the second positioning block 53, and the contact sensor is connected to the motor through the PCL module. In this way, full automation of centering can be achieved. When the part is placed on the inspection fixture, automatic centering is turned on, and the corresponding contact sensors on the first positioning block 33 and the second positioning block 53 check whether the part is in contact with the positioning block. If both are in contact, it means that the part is centered, and the PLC display screen shows that it is centered. If the two contact sensors are not in contact, the PLC program controls the drive mechanism to slowly push and clamp the part until the sensors on both sides are in contact with the part. At this time, the part reaches the final automatic centering state.

[0037] According to another preferred embodiment of the present invention, Figure 1 The first positioning module 30 and the second positioning module 50 in the embodiment are replaced with Figure 6 and Figure 7 The first positioning module 30' and the second positioning module 50' can also respectively realize manual adjustment and automatic adjustment of center positioning.

[0038] like Figure 6As shown, the first positioning module 30' comprises: a first movable module 32, a first positioning block 33 connected to the first movable module 32, and a first dial indicator 37 installed at one end of the first positioning block 33. The first positioning block 33 is connected to the first movable module 32 through a spring 38 and a slidable pin. The first positioning block 33 is also connected to the first movable module 32 through a guide groove 39. Similarly, the position of the first positioning block 33 relative to the first movable module 32 can be locked by a first zero position pin 36.

[0039] like Figure 7 As shown, the second positioning module 50' comprises: a second movable module 52, a second positioning block 53 connected to the second movable module 52, and a second dial indicator 57 installed at one end of the second positioning block 53. The second positioning block 53 is connected to the second movable module 52 through a spring 58 and a slidable pin. The second positioning block 53 is also connected to the second movable module 52 through a guide groove 59. Similarly, the position of the second positioning block 53 relative to the second movable module 52 can be locked by a second zero position pin 56.

[0040] The first dial gauge 37 and the second dial gauge 57 can be zeroed by the first zero pin 36 and the second zero pin 56. The specific operation is: when the first zero pin 36 and the second zero pin 56 and the third zero pin 16 are all inserted into the corresponding pin holes, the first positioning block 33 and the second positioning block 53 are both in the theoretical position, and the reading of the dial gauge can be directly reset to zero for the calibration of the positioning block, without the need for an additional zeroing block, thereby simplifying the zeroing operation.

[0041] When the manual centering function is needed, the third zero pin 16 is inserted, the first zero pin 36 and the second zero pin 56 are pulled out, and the compressed springs 38 and 58 respectively apply a force to the first positioning block 33 and the second positioning block 53. Driven by the springs 38 and 58, the positioning surfaces of the first positioning block 33 and the second positioning block 53 are in close contact with the part. At this time, the first dial indicator 37 and the second dial indicator 57 show the actual left and right centering position of the part. By tapping the part to make the first dial indicator 37 and the second dial indicator 57 show the same reading, the left and right centering adjustment operation is completed, and the part is in a centered state.

[0042] When the automatic centering function is used, the first zero pin 36 and the second zero pin 56 are inserted, and the first positioning block 33 and the second positioning block 53 cannot slide. At this time, the spring 38 and the spring 58 are in a compressed state, and the third zero pin 16 is pulled out. At this time, the automatic centering mechanism is unlocked and the automatic centering function is used.

[0043] The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. The above embodiments of the present invention can also be modified in various ways. All simple, equivalent changes and modifications made according to the claims and the description of the present invention fall within the scope of protection of the claims of the present invention. The contents not described in detail in the present invention are all conventional technical contents.

Claims

1. A gauge positioning mechanism capable of achieving automatic centering, characterized in that: include: Automatic centering module connected to the inspection fixture; a first positioning module connected to the automatic centering module via a first connecting rod, wherein the first positioning module comprises a first movable module and a first positioning block connected to the first movable module; and a second positioning module connected to the automatic centering module via a second connecting rod, wherein the second positioning module comprises a second movable module and a second positioning block connected to the second movable module; The first connecting rod and the second connecting rod are of the same length, the first positioning module and the second positioning module have the same structure and are respectively located at the left and right ends of the automatic centering module, and when a part is clamped between the first positioning block and the second positioning block, the part is automatically centered on the inspection fixture under the action of the automatic centering module; The first positioning module further includes a first fixing module connected to the first movable module via a guide rail, and the second positioning module further includes a second fixing module connected to the second movable module via a guide rail; The automatic centering module includes: a third fixed module fixed relative to the gauge, a third movable module connected to the third fixed module via a rotating shaft, and a power mechanism connecting the third fixed module with the third movable module and providing power to the third movable module, the first connecting rod and the second connecting rod are respectively connected to the third movable module; The position of the first positioning block relative to the first movable module is adjustable, and the position of the second positioning block relative to the second movable module is adjustable.

2. The gauge positioning mechanism according to claim 1, characterized in that: The power mechanism providing power to the third movable module includes: a movable pin, and a spring sleeved on the movable pin and always in a compressed state, one end of the movable pin is connected to the third fixed module, and the other end is connected to the third movable module.

3. The gauge positioning mechanism according to claim 1, characterized in that: The power mechanism providing power to the third movable module includes a motor. The first positioning block and the second positioning block are provided with contact sensors, and the contact sensors are connected to the motor through a PCL module.

4. The gauge positioning mechanism according to claim 1, characterized in that: The first positioning module further comprises: a first dial indicator mounted on one end of the first positioning block, the first positioning block being connected to the first movable module via a spring and a slidable pin; The second positioning module further comprises: a second dial indicator mounted on one end of the second positioning block, the second positioning block being connected to the second movable module via a spring and a slidable pin; By manually adjusting the part so that the readings of the first dial indicator and the second dial indicator are the same, the part can be manually centered on the gauge.

5. The gauge positioning mechanism according to claim 4, characterized in that: The first positioning block is connected to the first movable module via a guide groove, and the second positioning block is connected to the second movable module via a guide groove.

6. The gauge positioning mechanism according to claim 1, characterized in that: The position of the first positioning block relative to the first movable module can be locked by a first zero position pin, and the position of the second positioning block relative to the second movable module can be locked by a second zero position pin.

7. The gauge positioning mechanism according to claim 1 or 4, characterized in that: The position of the third movable module relative to the third fixed module can be locked by a third zero-position pin.

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