Road thickness detection sampling device

Abstract

The utility model relates to the technical field of road thickness detecting and sampling devices, in particular to a road thickness detecting and sampling device which comprises a supporting bottom frame, a connecting rod, an adjusting double-sided toothed plate, an adjusting gear, an adjusting shaft, a stable toothed plate, a connecting shaft, a connecting gear, a connecting block, a rotating shaft, a rotating wheel, a supporting assembly, a sampling assembly, an adjusting assembly and a guiding assembly. Two sets of stable toothed plates are arranged on the side walls of the two ends of the adjusting shafts, adjusting gears are arranged at one ends of the adjusting shafts, the adjusting double-faced toothed plates are meshed with the adjusting gears on the two sides, two sets of connecting shafts are arranged in the two sides of the supporting bottom frame, and connecting gears are arranged on the side walls of one ends of the connecting shafts and meshed with the adjusting gears; in the using process of the highway thickness detection sampling device, the adjusting shafts on the two sides drive the stable toothed plates on the two sides to adjust the angle in the opposite directions, it is ensured that the toothed structures of the bottom walls of the stable toothed plates can form stable support with the highway pavement, and the accuracy and efficiency of sampling core sample data are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to highway thickness detection sampling device technical field especially relates to a highway thickness detection sampling device. BACKGROUND

[0002] In the field of highway construction and maintenance, accurate measurement of the thickness of highway structure layer and effective sampling are of vital importance for evaluating engineering quality and ensuring road safety. Traditional highway thickness detection and sampling methods often face many challenges, such as complex operation, low efficiency, insufficient sampling accuracy, etc. These problems directly affect the subsequent material analysis, engineering quality control and road maintenance decision.

[0003] In actual use process, when the device starts to work, the high-speed operation of the sampling assembly and the vibration of the device caused by uneven road surface seriously affect the overall stability of the device. This vibration not only may cause the sampling position to deviate, affecting the accuracy of the core sample data, but also may accelerate the wear of the device components, reducing their service life. Therefore, it is urgent to improve the device to ensure the accuracy of the core sample data and improve the sampling efficiency.

[0004] Therefore, in view of the above problems of inconvenient to ensure the accuracy of the core sample data and improve the sampling efficiency, a highway thickness detection sampling device can be designed. When the highway thickness detection sampling device is in use, first, the device is moved to the predetermined detection position by a plurality of rotating wheels, and then the adjustment assembly is started to drive the two side guide assemblies to rise. When the two side guide assemblies rise, the two side adjustment double-sided tooth plates on them also rise and mesh with the two side adjustment gears, driving the two side adjustment gears to rotate in opposite directions. Then, the two side adjustment shafts drive the two side stable tooth plates to adjust the angle in opposite directions, ensuring that the toothed structure of the stable tooth plate bottom wall can form stable support with the highway pavement, enhancing the stability of the sampling on the inside and outside of the support chassis. At the same time, the rotation of the two side adjustment gears is also transmitted to the two side connecting shafts through the two side connecting gears, so that the two side connecting shafts and the two side rotating wheels on them are adjusted to rotate in opposite directions, realizing the folding of the rotating wheels, avoiding direct contact with the road surface, preventing the device from moving in position during sampling, and further improving the sampling stability. Finally, the sampling assembly is started, so that the required highway material sample can be smoothly cut and collected in a stable state, ensuring the accuracy and efficiency of the sampling core sample data. SUMMARY

[0005] In order to overcome the highway thickness detection sampling device in the process of using, when the device starts to work, due to the high speed operation of the sampling assembly and the vibration of the device caused by the uneven road surface, the overall stability of the device is seriously affected, this vibration not only may cause the sampling position to deviate, affect the accuracy of the core sample data, also may accelerate the wear and tear of the device parts, reduce its service life, need to be improved, and then it is inconvenient to ensure the accuracy of the core sample data and improve the sampling efficiency.

[0006] The technical scheme of the utility model discloses: a highway thickness detection sampling device, including support chassis, adjusting double-sided toothed plate, adjusting gear, adjusting shaft, firm toothed plate, connecting shaft, connecting gear, connecting block, rotating shaft, rotating wheel, support assembly, sampling assembly, adjusting assembly and guide assembly, the upper side of one side of support chassis is provided with adjusting assembly, one side of support chassis is provided with two guide assemblies, and the inner wall of both sides of adjusting assembly is fixedly connected with two guide assemblies, and the lateral wall of guide assembly is provided with adjusting double-sided toothed plate, and the inside of both sides of support chassis is provided with multiple adjusting shafts, and the lateral wall of both ends of adjusting shaft is provided with two firm toothed plates, and one end of adjusting shaft is provided with adjusting gear, and adjusting double-sided toothed plate is engaged with both sides adjusting gear, and the inside of both sides of support chassis is provided with two connecting shafts, and the lateral wall of one end of connecting shaft is provided with connecting gear, and connecting gear is engaged with adjusting gear, and the both ends of connecting shaft are provided with two connecting blocks, and the inside of connecting block is provided with rotating shaft, and one end of rotating shaft is provided with rotating wheel, and the upper side of support chassis is provided with support assembly, and the inner wall of one side of support assembly is provided with sampling assembly.

[0007] Preferably, when the highway thickness detection sampling device is in use, first, the device is moved to the predetermined detection position by multiple rotating wheels, then the adjusting assembly is started to drive the two guide assemblies to rise, when the two guide assemblies rise, the two adjusting double-sided toothed plates on them also rise, and are engaged with the two adjusting gears, drive the two adjusting gears to rotate in opposite directions, then drive the two firm toothed plates on the two adjusting shafts to adjust the angle in opposite directions, ensure that the toothed structure on the bottom wall of the firm toothed plate can form a firm support with the highway pavement, enhance the stability performance of the inside and outside of the support chassis during sampling, at the same time, the rotation of the two adjusting gears is also transmitted to the two connecting shafts through the two connecting gears, so that the two connecting shafts and the two rotating wheels on them are adjusted in opposite directions, realize the folding of the rotating wheel, avoid direct contact with the road surface, prevent the device from moving during sampling, further improve the sampling stability, finally, start the sampling assembly, can smoothly cut and collect the required highway material sample in a stable state, ensure the accuracy and efficiency of the core sample data.

[0008] As preferred, the supporting assembly comprises supporting pillars and supporting brackets, the supporting pillars are arranged above the supporting base, and the supporting pillars are arranged in multiple groups, and the supporting brackets are arranged above the supporting pillars.

[0009] As preferred, the sampling assembly comprises hydraulic telescopic rods, guide sliding plates and guide sliding rings, the hydraulic telescopic rods are arranged on the inner wall of one side of the supporting bracket, the guide sliding plates are arranged at one end of the hydraulic telescopic rods, two groups of guide sliding rings are arranged at both ends of the guide sliding plates, and the guide sliding rings are slidably connected with the supporting pillars.

[0010] As preferred, the sampling assembly further comprises fixing brackets, driving motors and sampling cylinders, the fixing brackets are arranged on one side of the guide sliding plates, the driving motors are arranged above the fixing brackets, and the sampling cylinders are arranged at the output ends of the driving motors.

[0011] As preferred, the adjusting assembly comprises adjusting motors, adjusting sliding grooves and adjusting lead screws, the adjusting motors are arranged above one side of the supporting base, the adjusting lead screws are arranged at the output ends of the adjusting motors, the adjusting sliding grooves are arranged on one side of the supporting base, and the adjusting lead screws are arranged in the adjusting sliding grooves.

[0012] As preferred, the adjusting assembly further comprises adjusting sliding blocks and connecting links, the adjusting sliding blocks are arranged on the side walls of the adjusting lead screws, the adjusting sliding blocks are threadedly connected with the adjusting lead screws, and two groups of the connecting links are arranged on both sides of the adjusting sliding blocks.

[0013] As preferred, the guide assembly comprises guide sliding rods, guide sliding grooves and guide sliding blocks, the guide sliding grooves are arranged on one side of the supporting base, the guide sliding rods are arranged in the guide sliding grooves, the guide sliding blocks are arranged on the side walls of the guide sliding rods, the guide sliding blocks are slidably connected with the guide sliding rods, and one end of the connecting links is fixedly connected with the inner part of the guide sliding blocks.

[0014] The utility model discloses the beneficial effects of:

[0015] When the highway thickness detection sampling device is in use, first, the device is moved to the predetermined detection position through a plurality of rotating wheels, and then the adjusting assembly is started to drive the two side guide assemblies to rise, when the two side guide assemblies rise, the two side adjusting double-sided tooth plates on the two side guide assemblies also rise and mesh with the two side adjusting gears, drive the two side adjusting gears to rotate in opposite directions, and then the two side stable tooth plates are adjusted in opposite directions through the two side adjusting shafts, so that the tooth structure of the bottom wall of the stable tooth plate can form stable support with the highway pavement, and the stability of the sampling of the inside and outside of the support chassis is enhanced, at the same time, the rotation of the two side adjusting gears is also transmitted to the two side connecting shafts through the two side connecting gears, so that the two side connecting shafts and the two side rotating wheels thereon are adjusted in opposite directions, the rotating wheels are retracted, direct contact with the pavement is avoided, the device is prevented from moving in position during sampling, and the sampling stability is further improved, finally, the sampling assembly is started, so that the required highway material sample can be cut and collected smoothly in a stable state, and the accuracy and efficiency of the sampling core sample data are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A first three-dimensional structure schematic view of a highway thickness detection sampling device is shown.

[0017] Figure 2 A first partial three-dimensional structure schematic view of a highway thickness detection sampling device is shown.

[0018] Figure 3 A second partial three-dimensional structure schematic view of a highway thickness detection sampling device is shown.

[0019] Figure 4 A third partial three-dimensional structure schematic view of a highway thickness detection sampling device is shown.

[0020] Figure 5 A fourth partial three-dimensional structure schematic view of a highway thickness detection sampling device is shown.

[0021] Figure 6 A fifth partial three-dimensional structure schematic view of a highway thickness detection sampling device is shown.

[0022] Explanation of reference signs: 1, support chassis; 3, adjusting double-sided toothed plate; 4, adjusting gear; 5, adjusting shaft; 6, stable toothed plate; 7, connecting shaft; 8, connecting gear; 9, connecting block; 10, rotating shaft; 11, rotating wheel; 101, support pillar; 102, support bracket; 201, hydraulic telescopic rod; 202, guide sliding plate; 203, guide sliding ring; 204, fixed bracket; 205, driving motor; 206, sampling cylinder; 301, adjusting motor; 302, adjusting sliding groove; 303, adjusting screw; 304, adjusting sliding block; 305, connecting link; 401, guide sliding rod; 402, guide sliding groove; 403, guide sliding block. DETAILED DESCRIPTION

[0023] The utility model is further explained in connection with the drawings and examples.

[0024] Please refer to Figures 1-4 The utility model provides a kind of highway thickness detection sampling device, including support chassis 1, connecting link 305, adjusting double-sided toothed plate 3, adjusting gear 4, adjusting shaft 5, stable toothed plate 6, connecting shaft 7, connecting gear 8, connecting block 9, rotating shaft 10, rotating wheel 11, support assembly, sampling assembly, adjusting assembly and guide component, the side upper portion of support chassis 1 is provided with adjusting assembly, the side of support chassis 1 is provided with two groups of guide components, the inner wall of two sides guide components is fixedly connected with the both ends of adjusting assembly, adjusting double-sided toothed plate 3 is provided on the side wall of guide component, the inside of the both sides of support chassis 1 is provided with multiple adjusting shafts 5, the both ends side wall of adjusting shaft 5 is provided with two groups of stable toothed plate 6, adjusting gear 4 is provided at one end of adjusting shaft 5, adjusting double-sided toothed plate 3 is engaged with two sides adjusting gear 4, the inside of the both sides of support chassis 1 is provided with two groups of connecting shafts 7, connecting gear 8 is provided on the one end side wall of connecting shaft 7, connecting gear 8 is engaged with adjusting gear 4, the both ends of connecting shaft 7 are provided with two groups of connecting blocks 9, rotating shaft 10 is provided in the inside of connecting block 9, rotating wheel 11 is provided at one end of rotating shaft 10, the upper portion of support chassis 1 is provided with support assembly, sampling assembly is provided on the side inner wall of support assembly.

[0025] Please refer to Figure 2The support assembly comprises support columns 101 and support brackets 102, the upper portion of the support base 1 is provided with the support columns 101, the support columns 101 are provided in multiple groups, the upper portion of the support columns 101 is provided with the support brackets 102, the support columns 101 and the support brackets 102 can play a supporting role, the sampling assembly comprises hydraulic telescopic rods 201, guide sliding plates 202 and guide sliding rings 203, the inner wall of one side of the support bracket 102 is provided with the hydraulic telescopic rod 201, one end of the hydraulic telescopic rod 201 is provided with the guide sliding plate 202, both ends of the guide sliding plate 202 are provided with two groups of guide sliding rings 203, the guide sliding rings 203 are slidably connected with the support columns 101, the hydraulic telescopic rod 201 is started to work, the telescopic movement of the piston rod thereof drives the guide sliding plate 202 connected therewith to move in the vertical direction, both ends of the guide sliding plate 202 are provided with the guide sliding rings 203, the guide sliding rings 203 are in sliding fit with the support columns 101, so that the guide sliding plate 202 can keep a stable track during the descending process and avoid deviation or shaking, the sampling assembly further comprises fixing brackets 204, driving motors 205 and sampling barrels 206, one side of the guide sliding plate 202 is provided with the fixing bracket 204, the upper portion of the fixing bracket 204 is provided with the driving motor 205, the output end of the driving motor 205 is provided with the sampling barrel 206, with the descending of the guide sliding plate 202, the fixing bracket 204 fixed to one side thereof also moves, when the guide sliding plate 202 drives the fixing bracket 204 to descend to the predetermined position, the driving motor 205 is started, the rotary power thereof is transmitted to the sampling barrel 206, so that the sampling barrel 206 starts to rotate, the rotary action of the sampling barrel 206 is to realize the sampling of the highway material, the sharp sampling edge thereof can cut into the surface of the highway, so as to obtain the material sample of a certain depth inside the highway, during the whole sampling process, the accurate control of the hydraulic telescopic rod 201 and the guiding action of the guide sliding plate 202 ensure that the sampling barrel 206 can accurately reach the predetermined sampling depth, at the same time, the stable rotation of the driving motor 205 ensures that the sampling barrel 206 can smoothly cut and collect the required highway material sample, after the sampling is completed, the hydraulic telescopic rod 201 is started to move reversely, so as to lift the sampling barrel 206 and the fixing bracket 204 to the original position, and subsequent sample analysis and processing work can be carried out.

[0026] Please refer to Figures 3-4The adjusting assembly comprises an adjusting motor 301, an adjusting sliding groove 302 and an adjusting lead screw 303, the adjusting motor 301 is arranged above one side of the supporting base 1, the output end of the adjusting motor 301 is provided with the adjusting lead screw 303, the adjusting sliding groove 302 is arranged on one side of the supporting base 1, and the adjusting lead screw 303 is arranged in the adjusting sliding groove 302, the adjusting motor 301 is started, the adjusting motor 301 drives the adjusting lead screw 303 to rotate, the adjusting assembly further comprises an adjusting sliding block 304 and a connecting rod 305, the adjusting sliding block 304 is arranged on the side wall of the adjusting lead screw 303 and is in threaded connection with the adjusting lead screw 303, two groups of the connecting rods 305 are arranged on the two sides of the adjusting sliding block 304, and the adjusting lead screw 303 drives the two groups of the connecting rods 305 to ascend along the adjusting sliding groove 302 through the adjusting sliding block 304, the guiding assembly comprises a guiding sliding rod 401, a guiding sliding groove 402 and a guiding sliding block 403, two groups of the guiding sliding grooves 402 are arranged on one side of the supporting base 1, the guiding sliding rod 401 is arranged in the guiding sliding groove 402, the guiding sliding block 403 is arranged on the side wall of the guiding sliding rod 401 and is in sliding connection with the guiding sliding rod 401, one end of the connecting rod 305 is fixedly connected with the inside of the guiding sliding block 403, and the two groups of the connecting rods 305 are transmitted to the two groups of the guiding sliding blocks 403, so that the two groups of the guiding sliding blocks 403 ascend on the two groups of the guiding sliding rods 401 synchronously.

[0027] When the road thickness detection sampling device is in use, first, the device is moved to a predetermined detection position through a plurality of rotating wheels 11, then the adjusting motor 301 is started, the adjusting motor 301 drives the adjusting lead screw 303 to rotate, and drives the adjusting sliding block 304 to ascend along the adjusting sliding groove 302, the action is transmitted to the two groups of the guiding sliding blocks 403 through the two groups of the connecting rods 305, so that the two groups of the guiding sliding blocks 403 ascend on the two groups of the guiding sliding rods 401 synchronously,

[0028] When the two groups of the guiding sliding blocks 403 ascend, the two groups of the adjusting double-sided toothed plates 3 on the two groups of the guiding sliding blocks 403 also ascend and are in meshing connection with the two groups of the adjusting gears 4, the two groups of the adjusting gears 4 are driven to rotate in opposite directions, then the two groups of the stable toothed plates 6 are driven to adjust the angles in opposite directions through the two groups of the adjusting shafts 5 and the two groups of the adjusting gears 4, so that the toothed structure of the bottom wall of the stable toothed plate 6 can form stable support with the road surface and the stability during sampling of the inside and outside of the supporting base 1 is enhanced,

[0029] Meanwhile, the rotation of the two groups of the adjusting gears 4 is also transmitted to the two groups of the connecting shafts 7 through the two groups of the connecting gears 8, so that the two groups of the connecting shafts 7 and the two groups of the rotating wheels 11 thereon are reversely adjusted to rotate, the rotating wheels 11 are retracted, direct contact with the road surface is avoided, the device is prevented from being horizontally translated during sampling, and the sampling stability is further improved,

[0030] Finally, the hydraulic telescopic rod 201 starts to work, and the telescopic movement of its piston rod drives the vertical movement of the guide sliding plate 202 connected thereto. The guide sliding plate 202 is provided with guide sliding rings 203 at both ends, which are in sliding fit with the supporting pillars 101, so as to ensure that the guide sliding plate 202 can maintain a stable trajectory during the descending process and avoid deviation or shaking,

[0031] With the descending of the guide sliding plate 202, the fixed support 204 fixed to one side of the guide sliding plate 202 also moves. When the guide sliding plate 202 drives the fixed support 204 to descend to a predetermined position, the driving motor 205 starts to work, and its rotating power is transmitted to the sampling cylinder 206, so that the sampling cylinder 206 starts to rotate. The rotating action of the sampling cylinder 206 is to realize the sampling of the highway material. The sharp sampling edge of the sampling cylinder 206 can cut into the surface of the highway, so as to obtain the material sample of a certain depth inside the highway,

[0032] During the whole sampling process, the accurate control of the hydraulic telescopic rod 201 and the guiding action of the guide sliding plate 202 ensure that the sampling cylinder 206 can accurately reach the predetermined sampling depth. Meanwhile, the stable rotation of the driving motor 205 ensures that the sampling cylinder 206 can smoothly cut and collect the required highway material sample,

[0033] After the sampling is completed, the hydraulic telescopic rod 201 is started to move reversely, so as to lift the sampling cylinder 206 and the fixed support 204 to the original position. Then, the subsequent sample analysis and processing work can be carried out,

[0034] As described above, the device can smoothly cut and collect the required highway material sample in a stable state, so as to ensure the accuracy and efficiency of the sampling core sample data.

[0035] Through the above steps, when the highway thickness detection and sampling device is in use, first, the device is moved to a predetermined detection position by a plurality of rotating wheels 11. Then, the adjustment assembly is started to drive the two side guide assemblies to ascend. When the two side guide assemblies ascend, the two side adjustment double-sided toothed plates 3 thereon also ascend and are in mesh with the two side adjustment gears 4. The two side adjustment gears 4 are driven to rotate in opposite directions, so as to drive the two side stable toothed plates 6 to adjust the angles in opposite directions through the two side adjustment shafts 5, so as to ensure that the toothed structure of the bottom wall of the stable toothed plate 6 can form a stable support with the highway pavement, and enhance the stability performance of the inside and outside of the supporting chassis 1 during sampling. Meanwhile, the rotation of the two side adjustment gears 4 is also transmitted to the two side connecting shafts 7 through the two side connecting gears 8, so that the two side connecting shafts 7 and the two side rotating wheels 11 thereon are reversely adjusted and rotated, so as to realize the folding of the rotating wheels 11 and avoid direct contact with the pavement, so as to prevent the device from being translated during sampling, and further improve the sampling stability. Finally, the sampling assembly is started, so that the required highway material sample can be smoothly cut and collected in a stable state, so as to ensure the accuracy and efficiency of the sampling core sample data.

[0036] The embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present application.

Claims

1. A highway thickness detection sampling device comprising a supporting chassis (1), characterized in that: Also include the connecting connecting rod (305), adjusting double-sided toothed plate (3), adjusting gear (4), adjusting shaft (5), stable toothed plate (6), connecting shaft (7), connecting gear (8), connecting block (9), rotating shaft (10), rotating wheel (11), support assembly, sampling assembly, adjusting assembly and guide assembly, the upper side of the support chassis (1) is provided with adjusting assembly, the side of the support chassis (1) is provided with two groups of guide assembly, both ends of the adjusting assembly are fixedly connected with the inner wall of the two sides guide assembly, the sidewall of the guide assembly is provided with adjusting double-sided toothed plate (3), the inside of the both sides of the support chassis (1) is provided with a plurality of adjusting shaft (5), the both ends of the sidewall of the adjusting shaft (5) are provided with two groups of stable toothed plate (6), one end of the adjusting shaft (5) is provided with adjusting gear (4), the adjusting double-sided toothed plate (3) is engaged with the both sides adjusting gear (4), the inside of the both sides of the support chassis (1) is provided with two groups of connecting shaft (7), one end of the sidewall of the connecting shaft (7) is provided with connecting gear (8), the connecting gear (8) is engaged with the adjusting gear (4), both ends of the connecting shaft (7) are provided with two groups of connecting block (9), the inside of the connecting block (9) is provided with rotating shaft (10), one end of the rotating shaft (10) is provided with rotating wheel (11), the upper side of the support chassis (1) is provided with support assembly, the inner wall of the one side of the support assembly is provided with sampling assembly.

2. A highway thickness detection sampling device according to claim 1, characterized in that: The support assembly comprises support struts (101) and support brackets (102), and the upper side of the support chassis (1) is provided with support struts (101), the support struts (101) are provided in multiple groups, and the upper side of the support struts (101) is provided with support brackets (102).

3. A highway thickness detecting and sampling device according to claim 2, characterized in that: The sampling assembly comprises hydraulic telescopic rods (201), guide sliding plates (202) and guide sliding rings (203), the inner wall of the one side of the support bracket (102) is provided with a hydraulic telescopic rod (201), one end of the hydraulic telescopic rod (201) is provided with a guide sliding plate (202), and the both ends of the guide sliding plate (202) are provided with two groups of guide sliding rings (203), and the guide sliding rings (203) are in sliding connection with the support struts (101).

4. A highway thickness detecting and sampling device according to claim 3, wherein: The sampling assembly further comprises fixing brackets (204), drive motors (205) and sampling barrels (206), the one side of the guide sliding plate (202) is provided with a fixing bracket (204), the upper side of the fixing bracket (204) is provided with a drive motor (205), and the output end of the drive motor (205) is provided with a sampling barrel (206).

5. A highway thickness detecting and sampling device according to claim 3, wherein: The adjusting assembly comprises adjusting motors (301), adjusting sliding grooves (302) and adjusting lead screws (303), the upper side of the one side of the support chassis (1) is provided with an adjusting motor (301), the output end of the adjusting motor (301) is provided with an adjusting lead screw (303), and the one side of the support chassis (1) is provided with an adjusting sliding groove (302), and the adjusting lead screw (303) is arranged in the adjusting sliding groove (302).

6. A highway thickness detecting and sampling device according to claim 5, wherein: The adjusting assembly further comprises adjusting sliding blocks (304) and connecting links (305), the side wall of the adjusting screw rod (303) is provided with the adjusting sliding blocks (304), the adjusting sliding blocks (304) are in threaded connection with the adjusting screw rod (303), and two groups of the connecting links (305) are arranged on the two sides of the adjusting sliding blocks (304).

7. A highway thickness detecting and sampling device according to claim 5, wherein: The guiding assembly comprises guiding sliding rods (401), guiding sliding grooves (402) and guiding sliding blocks (403), one side of the supporting base frame (1) is provided with two groups of the guiding sliding grooves (402), the guiding sliding grooves (402) are provided with the guiding sliding rods (401) in the interiors, the side wall of the guiding sliding rod (401) is provided with the guiding sliding blocks (403), the guiding sliding blocks (403) are in sliding connection with the guiding sliding rods (401), and one end of the connecting link (305) is fixedly connected with the interior of the guiding sliding block (403).

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