A rear subframe opening size detection mechanism

Abstract

The application provides a rear subframe opening size detection mechanism and relates to the technical field of size detection, which aims to solve the technical problem of the risk of product jamming in the prior art. The rear subframe opening size detection mechanism comprises a supporting seat, a first driving element, a second driving element, a connecting sheet, a supporting block, a first spring, a displacement sensor and two first detection blocks. The supporting block is fixedly connected with the second driving element. The first driving element is connected with the supporting seat and drives the second driving element and the supporting block to move left and right. The two first detection blocks are slidably connected on the supporting block in the front-rear direction. The first spring is connected between the two first detection blocks. The second driving element is connected with the connecting sheet. The displacement sensor is connected with one of the first detection blocks, and the measuring head of the displacement sensor is connected with the other first detection block. When the second driving element drives the connecting sheet to move left or right, the connecting sheet makes the two first detection blocks approach or move away from each other.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of size detection, in particular to a rear subframe opening size detection mechanism. BACKGROUND

[0002] The rear subframe is a part of the automobile chassis, mainly providing structural support, and also plays an important role in reducing vibration and noise, improving assembly efficiency, and improving the safety and comfort of the vehicle. The rear subframe of the automobile is a support for supporting the front and rear axles and the suspension. The opening on the rear subframe is an important installation feature for connecting the suspension. If the opening size is too small, the connecting rod cannot be installed. If the opening size is too large, it cannot meet the design requirements and there is a risk of failure. Therefore, the processing size of the opening needs to be detected.

[0003] As shown in Figure 7 and Figure 8 , the existing opening size detection mechanism: adopts the traditional go-no-go gauge mode. When detecting the opening, whether the go-no-go gauge can pass or stop is used to judge whether the product is qualified. Such detection method has the risk of go-no-go gauge clamping product in the case of product opening size limit or out-of-tolerance, which causes the detection tool to run smoothly and triggers the alarm to interrupt the detection; even causes damage to the product, and the traditional structure cannot realize the function of quantifying the detection data. SUMMARY

[0004] In view of the shortcomings of the prior art, the purpose of the present application is to provide a rear subframe opening size detection mechanism to solve the technical problem of the risk of clamping products in the prior art rear subframe opening size detection mechanism.

[0005] To solve the above technical problems, the present application provides a rear subframe opening size detection mechanism, which comprises a support seat, a first driving member, a second driving member, a connecting piece, a support block, a first spring, a displacement sensor and two first detection blocks. The support block is fixedly connected with the second driving member and located on the left side of the second driving member. The first driving member is connected with the support seat and drives the second driving member and the support block to move left and right. The two first detection blocks are slidably connected to the support block in the front-rear direction. The first spring is connected between the two first detection blocks and drives the two first detection blocks to move away from each other. The second driving member is connected with the connecting piece and drives the connecting piece to move left and right. The displacement sensor is connected to one of the first detection blocks, and the measuring head of the displacement sensor is connected to the other first detection block. When the second driving member drives the connecting piece to move left or right, the connecting piece causes the two first detection blocks to move closer or farther away from each other.

[0006] After the above structure, the rear subframe opening size detection mechanism has the following advantages: the second driving element drives the connecting piece to move so that the two first detection blocks move closer to each other, then the first driving element drives the two first detection blocks into the product opening, at this time the second driving element drives the connecting piece to move reversely, under the action of the first spring, the two first detection blocks move away from each other and respectively adhere to the inner walls on both sides of the opening, at this time the displacement sensor can detect the distance between the two first detection blocks to obtain the opening size, realizing the detection of the opening size, after the detection is completed, the second driving element drives the connecting piece to move so that the two first detection blocks move closer to each other again, and finally the first driving element drives the two first detection blocks to move away from the opening; during the entire detection process, the first detection blocks will not be stuck with the product, preventing the detection from being interrupted due to alarm, and also preventing damage to the product, and the displacement sensor can also realize the quantization of the opening size detection and the data traceability.

[0007] As an improvement, the connecting piece is provided with an open slot at the left end, the open slot is symmetrically arranged front and back, the two inner walls in the front and back direction of the open slot are inclined surfaces and the width of the open slot in the front and back direction gradually increases from right to left, the bottom end of each first detection block is provided with a limiting pin, and the limiting pins of the two first detection blocks are respectively in abutment with the two inner walls in the front and back direction of the open slot; when the second driving element drives the connecting piece to move leftward, the connecting piece moves the two first detection blocks closer to each other; by adopting this structure, the inner walls of the open slot are arranged as inclined surfaces, which can convert the left and right movement of the connecting piece into the front and back movement of the two first detection blocks, and cooperate with the first spring to realize the synchronous movement of the two first detection blocks towards or away from each other.

[0008] As an improvement, the support block is connected with a guide shaft arranged in the front and back direction, the two first detection blocks are slidingly connected to the guide shaft, and the first spring is sleeved on the guide shaft; by adopting this structure, the stability and accuracy of the front and back movement of the first detection blocks are improved, and the opening size detection precision is improved.

[0009] As an improvement, the two first detection blocks are slidingly connected to the guide shaft through linear bearings; by adopting this structure, the friction coefficient is reduced, achieving sensitive and smooth functions.

[0010] As an improvement, the first detection block comprises a detection part and a connecting part connected to each other, the first spring is connected between the connecting parts of the two first detection blocks, and a second spring is arranged between the detection parts of the two first detection blocks; by adopting this structure, the second spring and the first spring are respectively arranged between the detection part and the connecting part of the first detection block, so that the movement of the first detection blocks as a whole is uniform, the distance between the detection parts and the distance between the connecting parts are kept consistent, and the opening size detection precision is improved.

[0011] As improvement, the application also comprises a calibration block, the calibration block is provided with a calibration slot for the two first detection blocks to enter, the first detection block obtains a reference value by detecting the width of the calibration slot; by using the width of the calibration slot of the calibration block as the standard value for zero calibration, the opening size can be directly judged from the value of the displacement sensor to determine whether the opening size is qualified, so that the detection is more convenient.

[0012] As improvement, the first detection block is provided with a mounting hole, a spherical bearing is connected in the mounting hole, the second detection block is connected to the spherical bearing and located outside the first detection block, a gap is arranged between the second detection block and the first detection block to enable the second detection block to deflect relative to the first detection block, a plurality of spring plungers are arranged on the first detection block and equidistantly arranged around the spherical bearing in the circumferential direction, each spring plunger abuts against the second detection block to enable the second detection block to be arranged in parallel with the first detection block; by using this structure, the opening inner wall of the product may exist in two situations of inclination and parallelism, when the parallel situation is dealt with, the second detection block directly abuts against the opening inner wall to detect the opening size, when the inclined situation is dealt with, the second detection block can deflect to abut against the opening inner wall due to the arrangement of the spherical bearing and the spring plunger, so that the opening size in the inclined state is more accurately detected.

[0013] As improvement, the first detection block is provided with a mounting hole, a spherical bearing is connected in the mounting hole, the second detection block is connected to the spherical bearing and located outside the first detection block, a gap is arranged between the second detection block and the first detection block to enable the second detection block to deflect relative to the first detection block, a plurality of spring plungers are arranged on the first detection block and equidistantly arranged around the spherical bearing in the circumferential direction, each spring plunger abuts against the second detection block to enable the second detection block to be arranged in parallel with the first detection block; by using this structure, the opening inner wall of the product may exist in two situations of inclination and parallelism, when the parallel situation is dealt with, the second detection block directly abuts against the opening inner wall to detect the opening size, when the inclined situation is dealt with, the second detection block can deflect to abut against the opening inner wall due to the arrangement of the spherical bearing and the spring plunger, so that the opening size in the inclined state is more accurately detected.

[0014] As improvement, the first detection block is provided with a mounting hole, a spherical bearing is connected in the mounting hole, the second detection block is connected to the spherical bearing and located outside the first detection block, a gap is arranged between the second detection block and the first detection block to enable the second detection block to deflect relative to the first detection block, a plurality of spring plungers are arranged on the first detection block and equidistantly arranged around the spherical bearing in the circumferential direction, each spring plunger abuts against the second detection block to enable the second detection block to be arranged in parallel with the first detection block; by using this structure, the opening inner wall of the product may exist in two situations of inclination and parallelism, when the parallel situation is dealt with, the second detection block directly abuts against the opening inner wall to detect the opening size, when the inclined situation is dealt with, the second detection block can deflect to abut against the opening inner wall due to the arrangement of the spherical bearing and the spring plunger, so that the opening size in the inclined state is more accurately detected.

[0015] As improvement, the first detection block is provided with a mounting hole, a spherical bearing is connected in the mounting hole, the second detection block is connected to the spherical bearing and located outside the first detection block, a gap is arranged between the second detection block and the first detection block to enable the second detection block to deflect relative to the first detection block, a plurality of spring plungers are arranged on the first detection block and equidistantly arranged around the spherical bearing in the circumferential direction, each spring plunger abuts against the second detection block to enable the second detection block to be arranged in parallel with the first detection block; by using this structure, the opening inner wall of the product may exist in two situations of inclination and parallelism, when the parallel situation is dealt with, the second detection block directly abuts against the opening inner wall to detect the opening size, when the inclined situation is dealt with, the second detection block can deflect to abut against the opening inner wall due to the arrangement of the spherical bearing and the spring plunger, so that the opening size in the inclined state is more accurately detected. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a perspective view of the application without a dust cover.

[0017] Figure 2 It is a perspective view of the application after the dust cover is installed.

[0018] Figure 3 It is a top view of the application without a dust cover.

[0019] Figure 4 It is a structure diagram of the connecting piece and the limiting pin.

[0020] Figure 5 It is a schematic diagram of exploded structure of the first detection block and the second detection block in the application.

[0021] Figure 6 It is a schematic diagram of perspective structure of the calibration block in the application.

[0022] Figure 7 It is a schematic diagram of structure of the detection mechanism in the prior art.

[0023] Figure 8 It is a schematic diagram of structure of the detection mechanism for detecting the opening size of the product in the prior art.

[0024] Reference signs: 1, support seat; 2, first driving member; 3, second driving member; 4, connecting piece; 5, support block; 6, first spring; 7, displacement sensor; 8, first detection block; 81, detection part; 82, connecting part; 9, opening groove; 10, limiting pin; 11, guide shaft; 12, calibration block; 121, calibration groove; 13, second spring; 14, mounting hole; 15, spherical bearing; 16, second detection block; 17, spring plunger; 18, baffle; 19, dust cover; 20, fixed plate. DETAILED DESCRIPTION

[0025] The application will be described in detail below with reference to the drawings.

[0026] As shown in the drawings, Figures 1 to 6 A rear subframe opening size detection mechanism, comprising a support seat 1, a first driving member 2, a second driving member 3, a connecting piece 4, a support block 5, a first spring 6, a displacement sensor 7 and two first detection blocks 8, the support block 5 is fixedly connected with the second driving member 3 and located on the left side of the second driving member 3, the first driving member 2 is connected with the support seat 1 and drives the second driving member 3 and the support block 5 to move left and right, as shown in the drawings, Figure 1 the first driving member 2 is connected with a fixed plate 20 and drives the fixed plate 20 to move left and right, the second driving member 3 and the support block 5 are fixedly connected with the fixed plate 20, wherein the first driving member 2 is a pneumatic slide and is arranged at the top end of the support seat 1, and the fixed plate 20 is connected at the top end of the first driving member 2.

[0027] As shown in the drawings, Figure 1 the two first detection blocks 8 are slidingly connected on the support block 5 in the front-rear direction, and the first spring 6 is connected between the two first detection blocks 8 and drives the two first detection blocks 8 to move away from each other, in this embodiment, the support block 5 has a concave structure with left and right openings, as shown in the drawings, Figure 3 the support block 5 is connected with guide shafts 11 arranged in the front-rear direction (i.e. the left-right direction in the drawings), Figure 3 the two first detection blocks 8 are slidingly connected on the guide shafts 11, and the first spring 6 is sleeved on the guide shafts 11.

[0028] In addition, the first detection block 8 comprises a detection part 81 and a connecting part 82 connected with each other, the first spring 6 is connected between the connecting parts 82 of the two first detection blocks 8, the detection parts 81 of the two first detection blocks 8 are provided with the second spring 13, and the connecting parts 82 are slidably connected with the guide shaft 11, and the two first detection blocks 8 are slidably connected with the guide shaft 11 through linear bearings, specifically, the connecting parts 82 are slidably connected with the guide shaft 11 through linear bearings.

[0029] As shown in Figure 3 , the second driving member 3 is connected with the connecting sheet 4 and drives the connecting sheet 4 to move left and right (i.e. up and down in Figure 3 ), the displacement sensor 7 is connected with one of the first detection blocks 8, and the measuring head of the displacement sensor 7 is connected with the other first detection block 8, and the connecting sheet 4 is located below the first detection blocks 8, when the second driving member 3 drives the connecting sheet 4 to move left or right, the connecting sheet 4 makes the two first detection blocks 8 approach or move away from each other.

[0030] Specifically, as shown in Figure 3 and Figure 4 , the left end (i.e. the upper end in Figure 4 ) of the connecting sheet 4 is provided with an open slot 9, the open slot 9 is symmetrically arranged front and back, the two inner walls in the front and back direction of the open slot 9 are inclined surfaces, and the width of the open slot 9 in the front and back direction gradually increases from right to left, the bottom end of each first detection block 8 is provided with a limiting pin 10, and the limiting pins 10 of the two first detection blocks 8 are respectively abutted with the two inner walls in the front and back direction of the open slot 9, when the second driving member 3 drives the connecting sheet 4 to move left, the connecting sheet 4 makes the two first detection blocks 8 approach each other, wherein the second driving member 3 is a guide cylinder.

[0031] As shown in Figure 2 , the support block 5 is connected with a dust cover 19 covering the support block 5 and the displacement sensor 7; as shown in Figure 6 , the present application further comprises a calibration block 12, the calibration block 12 is provided with a calibration slot 121 for the two first detection blocks 8 to enter, and the first detection blocks 8 obtain the reference value by detecting the width of the calibration slot 121.

[0032] The second driving member 3 drives the connecting piece 4 to move so that the two first detection blocks 8 are close to each other, then the first driving member 2 drives the two first detection blocks 8 to enter the product opening, at this time, the second driving member 3 drives the connecting piece 4 to move reversely, under the action of the first spring 6, the two first detection blocks 8 are away from each other and are respectively attached to the inner walls on both sides of the opening, at this time, the displacement sensor 7 can detect the interval between the two first detection blocks 8 to obtain the size of the opening, so that the detection of the size of the opening is realized, after the detection is completed, the second driving member 3 drives the connecting piece 4 to move so that the two first detection blocks 8 are close to each other again, and finally the first driving member 2 drives the two first detection blocks 8 to leave the opening; in the whole detection process, the first detection blocks 8 will not be stuck with the product, so that the alarm and the interruption of the detection are prevented, and the product is not damaged, meanwhile, the displacement sensor 7 can also realize the quantization of the detection of the size of the opening, and the data traceability is realized through the product two-dimensional code.

[0033] The application is part of an automatic gauge, before detection, a screen zero button is clicked, and a calibration block 12 is used to zero the application; after zeroing, a start button is pressed, a lifting mechanism is lifted, a product is placed on a limiting block of the lifting mechanism, a laser sensor senses that the product is placed, a cylinder drives the lifting mechanism to descend, the product is stably placed into the gauge through a reference assembly, the laser sensor senses that the product is placed in place, and a compression assembly compresses the product, and the application starts to detect.

[0034] When the second driving member 3 pushes the connecting piece 4 to run to the left, the limiting pin 10 is relatively close, so that the interval of the first detection block 8 is small; the first driving member 2 starts to run, and the first detection block 8 is moved to the left to a theoretical detection position, that is, a product opening; the second driving member 3 drives the connecting piece 4 to retreat to the right to a starting position, the two first detection blocks 8 are expanded outward under the action of the middle first spring 6, until the two first detection blocks 8 contact the product opening surface, the displacement sensor 7 on the first detection block 8 is used to obtain the displacement of the two first detection blocks 8, the size of the opening is calculated, and the size of the opening is output to the PLC to determine whether the size of the opening is qualified or not. After signal transmission is completed, the second driving member 3 pushes the connecting piece 4 to move to the left, the limiting pin 10 at the bottom of the first detection block 8 is close to the middle, so that the interval of the first detection block 8 is small; the first driving member 2 drives the first detection block 8 to retreat to the starting position, and the detection is completed. The compression assembly releases the product, the lifting mechanism is lifted upward to drive the product to leave the gauge, and the whole detection process is completed.

[0035] In the application, the pneumatic element is advanced to a position and retreated to a position, signals are captured by a magnetic switch installed on the pneumatic element and are transmitted to the PLC, when each group of mechanisms operates, the PLC needs to feed back an execution command, and then the operation can be performed; otherwise, an alarm is given and the operation is stopped.

[0036] In addition, each first detection block 8 is provided with a mounting hole 14, a spherical bearing 15 is connected in the mounting hole 14, a second detection block 16 is connected on the spherical bearing 15 and located outside the first detection block 8, a gap is provided between the second detection block 16 and the first detection block 8 so that the second detection block 16 can be deflected relative to the first detection block 8, a plurality of spring plungers 17 are provided on the first detection block 8 and arranged at equal intervals in the circumferential direction of the spherical bearing 15, each spring plunger 17 abuts against the second detection block 16, and the second detection block 16 is arranged parallel to the first detection block 8. It should be noted that the second detection block 16 and the first detection block 8 are not necessarily completely parallel, and only need to be relatively parallel.

[0037] The inner side end surface of each first detection block 8 is connected with a baffle plate 18 for covering the spherical bearing 15 and the spring plunger 17. When coping with the situation of the slotted inner wall being inclined, due to the arrangement of the spherical bearing 15 and the spring plunger 17, the second detection block 16 can be deflected to fit the slotted inner wall, so that whether the size of the slotted opening is qualified under the inclined state can be more accurately detected.

[0038] The above describes the embodiments of the present application in combination with the drawings, but the present application is not limited to the above-described one embodiment, and all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

Claims

1. A rear subframe opening dimension detection mechanism, characterized in that, The utility model provides a kind of support seat (1), first driving element (2), second driving element (3), connecting sheet (4), support block (5), first spring (6), displacement sensor (7) and two first detection block (8), the support block (5) with the second driving element (3) fixed connection and the support block (5) is located in the second driving element (3) left side, the first driving element (2) is connected in the support seat (1) and drives the second driving element (3) and the support block (5) left and right movement, two the first detection block (8) is slidably connected on the support block (5) along front and back direction, the first spring (6) is connected between two the first detection block (8) and drives two the first detection block (8) away from each other, the second driving element (3) connects the connecting sheet (4) and drives the connecting sheet (4) left and right movement, the displacement sensor (7) is connected in one of the first detection block (8) and the measuring head of the displacement sensor (7) is connected in another first detection block (8), when the second driving element (3) drives the connecting sheet (4) left or right movement, the connecting sheet (4) makes two the first detection block (8) approach each other or away from each other; The left end of the connecting sheet (4) is provided with an open slot (9), the open slot (9) is symmetrically arranged in front and back, the two inner walls in front and back direction of the open slot (9) are both inclined surfaces, and the width of the open slot (9) in front and back direction gradually increases from right to left, the bottom end of each first detection block (8) is provided with a limiting pin (10), and the limiting pins (10) of the two first detection blocks (8) respectively abut against the two inner walls in front and back direction of the open slot (9), when the second driving element (3) drives the connecting sheet (4) to move left, the connecting sheet (4) makes two the first detection block (8) approach each other. Each first detection block (8) is provided with a mounting hole (14), a spherical bearing (15) is connected in the mounting hole (14), a second detection block (16) is connected on the spherical bearing (15), and the second detection block (16) is located outside the first detection block (8), a gap is arranged between the second detection block (16) and the first detection block (8), so that the second detection block (16) can be deflected relative to the first detection block (8), a plurality of spring plungers (17) are arranged on the first detection block (8) and surround the spherical bearing (15) circumferentially and equidistantly, each spring plunger (17) abuts against the second detection block (16), so that the second detection block (16) and the first detection block (8) are arranged in parallel.

2. The rear subframe gap dimension detection mechanism according to claim 1, characterized by, The support block (5) is connected with a guide shaft (11) arranged in front and back direction, and the two first detection blocks (8) are slidably connected to the guide shaft (11), and the first spring (6) is sleeved on the guide shaft (11).

3. The rear subframe gap dimension detection mechanism according to claim 2, characterized by, The two first detection blocks (8) are slidably connected to the guide shaft (11) through linear bearings.

4. The rear subframe gap dimension detection mechanism according to claim 1, characterized by The first detection block (8) comprises a detection part (81) and a connecting part (82) connected with each other, the first spring (6) is connected between the connecting parts (82) of two first detection blocks (8), and the detection parts (81) of the two first detection blocks (8) are provided with a second spring (13).

5. The rear subframe gap dimension detection mechanism according to claim 1, characterized by A calibration block (12) is further included, the calibration block (12) is provided with a calibration slot (121) for the two first detection blocks (8) to enter, and the first detection blocks (8) obtain a reference value by detecting the width of the calibration slot (121).

6. The rear subframe gap dimension detection mechanism according to claim 1, characterized by An end face of each first detection block (8) is connected with a baffle (18) for covering the spherical bearing (15) and the spring plunger (17).

7. The rear subframe gap dimension detection mechanism according to claim 1, characterized by The support block (5) is connected with a dust cover (19) for covering the support block (5) and the displacement sensor (7).

8. The rear subframe gap dimension detection mechanism according to claim 1, characterized by, The first driving member (2) is connected with a fixed plate (20) and drives the fixed plate (20) to move left and right, and the second driving member (3) and the support block (5) are fixedly connected with the fixed plate (20).

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