A tread block stiffness testing platform

Abstract

The present application discloses a tread block stiffness test platform, comprising a pavement, a pavement base plate, a platform chassis and a plurality of platform chassis hydraulic cylinders, one end of the platform chassis hydraulic cylinder is hinged to the platform chassis, and the other end of the platform chassis hydraulic cylinder is hinged to the loading frame of the tread block stiffness test platform; an internal cavity is arranged in the platform chassis, the upper end opening of the internal cavity of the platform chassis is arranged on the upper surface of the platform chassis, the pavement base plate is arranged in the internal cavity of the platform chassis, and the pavement base plate slides relative to the platform chassis in a direction perpendicular to the pavement base plate. The advantages of the present invention are: when testing the stiffness of the tread block, it is convenient to measure the stress of the tread block, and the slope of the pavement can be automatically adjusted, which is convenient for changing different types of pavements and improving the test efficiency.

Description

Technical Field

[0001] The invention relates to a tread block stiffness testing platform and belongs to the field of tire equipment. Background Art

[0002] As the connecting part between the car and the ground, the performance of the tire directly affects the car's load-bearing capacity, braking, driving and handling stability. The tread block is the part of the tire that directly contacts the ground. The structural performance of the tread block directly determines the performance of the tire, especially the stiffness characteristics of the tread block, which plays an important role in the tire's force transmission, cornering, braking and lateral deviation. Therefore, the study of the stiffness characteristics of the tread block is the key to the development of high-performance tires.

[0003] When testing the stiffness of the tread blocks, it is necessary to test the tread blocks on road surfaces of different types and slopes to simulate the stress conditions of the tire under different road conditions.

[0004] In the prior art, there is no complete set of tread block stiffness testing platform. In the process of testing the stiffness of tread blocks, it is inconvenient to change different types of road surfaces and adjust the slope of the road surface, and it is difficult to measure the stress conditions of the tread blocks under different road conditions. The test time is long and the test efficiency is low. Summary of the invention

[0005] The technical solution of the present invention provides a tread block stiffness testing platform, which is convenient for measuring the stress condition of the tread block when testing the stiffness of the tread block, and can automatically adjust the slope of the road surface, making it convenient to change different types of road surfaces and improving the testing efficiency.

[0006] In order to solve the above-mentioned technical problems, the technical solution adopted by the present invention is:

[0007] A tread block stiffness test platform comprises a pavement, a pavement base plate and a platform frame; an internal cavity is arranged on the upper surface of the platform frame, the pavement base plate is arranged in the internal cavity, the pavement base plate slides relative to the platform frame in a direction perpendicular to the pavement base plate, the pavement base plate is arranged on the pavement base plate and is located in the middle of the upper surface of the pavement base plate; a pavement sensor assembly is arranged in the platform frame, and the pavement sensor assembly is in contact with the pavement base plate; a plurality of pavement clamping devices are arranged on the platform frame, one end of the pavement clamping device is connected to the platform frame, and the other end of the pavement clamping device is in contact with the pavement surface; the platform frame is connected to a lifting and adjusting assembly for adjusting the angle and height of the platform frame, and the lifting and adjusting assembly is connected to a loading frame of the tread block stiffness test platform.

[0008] Optimized, the above-mentioned tread block stiffness test platform, the lifting and adjustment assembly includes a plurality of platform frame hydraulic cylinders, one end of the platform frame hydraulic cylinder is hinged to the platform frame, and the other end of the platform frame hydraulic cylinder is hinged to the loading frame of the tread block stiffness test platform; the platform frame hydraulic cylinder includes a frame hydraulic cylinder base, a frame hydraulic cylinder barrel, a frame hydraulic cylinder rod and a frame hydraulic cylinder connecting block; the frame hydraulic cylinder base is fixedly arranged on the loading frame of the tread block stiffness test platform by bolts, and the end of the frame hydraulic cylinder barrel is hinged to the frame hydraulic cylinder base; the frame hydraulic cylinder rod is arranged in the frame hydraulic cylinder barrel and slides with the frame hydraulic cylinder barrel, the end of the frame hydraulic cylinder rod is hinged to the frame hydraulic cylinder connecting block, and the frame hydraulic cylinder connecting block is fixedly arranged on the platform frame by bolts.

[0009] Optimized, the above-mentioned tread block stiffness test platform, the road surface sensor assembly includes a plurality of lateral force sensors and a plurality of longitudinal force sensors, the lateral force sensors and the longitudinal force sensors are arranged between the internal cavity of the platform frame and the road surface base plate; an annular protrusion is arranged on the surface of the road surface base plate facing the inner bottom end surface of the internal cavity of the platform frame; one end of the lateral force sensor contacts the side surface of the annular protrusion, and the other end of the lateral force sensor is fixed to the inner surface of the internal cavity of the platform frame; one end of the longitudinal force sensor contacts the lower surface of the road surface base plate, and the other end of the longitudinal force sensor is fixed to the inner surface of the internal cavity of the platform frame.

[0010] Optimized, the above-mentioned tread block stiffness test platform, the pavement sensor assembly also includes a plurality of ground scale devices, the ground scale devices are evenly distributed in the internal cavity of the platform chassis, one end of the ground scale device is arranged in the internal cavity of the platform chassis and fixedly connected to the platform chassis, and the other end of the ground scale device is in contact with the lower surface of the pavement base plate; the ground scale device is in uniform contact with the edge of the lower surface of the pavement base plate.

[0011] Optimized, the above-mentioned tread block stiffness test platform, the number of the lateral force sensors is eight, and four lateral force sensors are respectively arranged on both sides of the annular protrusion on the lower surface of the pavement base plate; the number of the longitudinal force sensors is twelve, and the longitudinal force sensors are evenly divided into two groups and are respectively in uniform contact with both sides of the lower surface of the pavement base plate.

[0012] Optimized, the above-mentioned tread block stiffness test platform, the pavement clamping device includes a first clamping lever, a second clamping lever, a clamping connecting plate, a clamping fixing block, a clamping disk, and a clamping connecting block; a clamping power device is arranged on the side surface of the platform chassis, and one end of the clamping power device is hinged to the side surface of the platform chassis; the clamping connecting block is arranged in the clamping connecting plate and hinged to the clamping connecting plate, the clamping connecting plate is fixed to the clamping fixing block by bolts, and the clamping fixing block is fixedly connected to the pavement bottom plate; the lower part of the middle section of the first clamping lever is hinged to the clamping connecting plate through the clamping connecting block, and the lower part of the middle section of the first clamping lever is hinged to the clamping connecting block; one end of the first clamping lever is hinged to the clamping power device, and the other end of the first clamping lever is hinged to the end of the second clamping lever; the lower part of the middle section of the second clamping lever is hinged to the clamping connecting plate, one end of the second clamping lever is hinged to the first clamping lever, and the other end of the second clamping lever is provided with a clamping disk.

[0013] Optimized, the above-mentioned tread block stiffness testing platform, the clamping power device includes a clamping hydraulic cylinder, a clamping hydraulic cylinder rod and a first transition slider; the clamping hydraulic cylinder is hinged to the side surface of the platform frame, the clamping hydraulic cylinder rod is arranged in the clamping hydraulic cylinder and is in sliding contact with the inner surface of the clamping hydraulic cylinder, and the end of the clamping hydraulic cylinder rod is hinged to the end of the first clamping lever through the first transition slider.

[0014] Optimized, the above-mentioned tread block stiffness testing platform, the end of the second clamping lever is provided with a clamping nut and a clamping screw, the clamping screw passes through the end of the second clamping lever and is arranged vertically with the second clamping lever, two clamping nuts are threadedly connected on the clamping screw, and the clamping nut is in contact with the surface of the second clamping lever; the clamping plate is fixedly arranged at the end of the clamping screw.

[0015] Optimized, the above-mentioned tread block stiffness test platform, the platform chassis is provided with a road surface transmission mechanism, the road surface transmission mechanism is connected to a plurality of road surface transmission hydraulic cylinders, the cylinder barrels of the road surface transmission hydraulic cylinders are installed in the internal cavity of the platform chassis; a bottom plate base is provided in the internal cavity of the platform chassis, and the hydraulic rods of the road surface transmission hydraulic cylinders are in contact with the bottom plate base.

[0016] Optimized, the above-mentioned pattern block stiffness test platform, the road surface transmission mechanism includes a small roller, a roller baffle, a roller motor, a roller shell and a roller bottom plate; the roller baffle is U-shaped, the small roller is arranged in the U-shaped opening of the roller baffle and is connected to the roller baffle through a pin shaft, and each small roller is connected to a roller motor; the roller bottom plate is arranged in the annular protrusion of the road surface bottom plate, and the roller bottom plate slides relative to the road surface bottom plate in a direction perpendicular to the roller bottom plate; the small roller is installed inside the roller baffle, and the two are connected by a pin shaft. There are two roller baffles in total, and a number of rollers are installed in each roller baffle Small rollers, each of which is connected to a roller motor, and the roller baffle is wrapped by a roller shell, and the roller shell, roller motor and roller baffle are all arranged on the roller bottom plate; a plurality of bottom plate bases are welded to the upper end of the lower surface of the roller bottom plate; the road surface transmission hydraulic cylinder includes a road surface hydraulic cylinder barrel, a road surface hydraulic cylinder rod and a second transition slider, and the road surface hydraulic cylinder barrel is installed on the lower inner side of the internal cavity of the platform chassis, and the road surface hydraulic cylinder rod is arranged in the road surface hydraulic cylinder barrel, and the road surface hydraulic cylinder rod is connected to one end of the second transition slider through a pin shaft, and the other end of the second transition slider is connected to the bottom plate base through a pin shaft.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) The lateral force sensor is used to measure the lateral force caused by the tread block during the test, and the longitudinal force sensor is used to measure the longitudinal force caused by the tread block during the test. When the tread block moves laterally or longitudinally along the horizontal direction of the road surface, it will cause the road bottom plate to move horizontally, thereby compressing or stretching the lateral force sensor and the longitudinal force sensor to generate related lateral force or longitudinal force. After measuring the displacement of the tread block, the lateral stiffness or longitudinal stiffness of the tread block is finally obtained according to force = displacement × stiffness.

[0019] (2) The platform frame hydraulic cylinder can support and adjust the height of the platform frame, and the angle of the platform frame can be adjusted by forming different lengths through each platform frame hydraulic cylinder, thereby adjusting the height and angle of the road surface. During the tread block detection process, the stress conditions of the tread blocks under driving conditions at different road angles can be simulated.

[0020] (3) A ground balance device is installed in the internal cavity of the platform chassis. When the tread block moves vertically downward, it compresses the road surface base plate, and the road surface base plate further compresses the ground balance device, thereby generating a radial force in the vertical direction. The radial stiffness of the tread block is finally calculated according to the relevant formula.

[0021] (4) Eight lateral force sensors and twelve longitudinal force sensors are evenly distributed between the pavement base plate and the platform frame, so that the force at each position of the pavement base plate can be evenly transmitted and measured.

[0022] (5) By adjusting the position of the clamping nut on the clamping screw, the length of the clamping screw passing through the end of the second clamping lever can be adjusted, thereby adjusting the relative distance between the clamping plate and the end of the second clamping lever, and adjusting the clamping condition of the clamping plate on the road surface, thereby adapting to the clamping and fixing requirements of roads of different thicknesses.

[0023] (6) In order to facilitate the replacement of different types of road surfaces, a road surface transmission hydraulic cylinder is used to lift and lower the road surface transmission mechanism, and the road surface is transported through the road surface transmission mechanism to facilitate the replacement of the road surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 for Figure 1 The internal schematic diagram of the platform chassis is removed;

[0026] Figure 3 A half-section schematic diagram of the internal structure of the present invention;

[0027] Figure 4 It is a structural schematic diagram of the platform chassis of the present invention;

[0028] Figure 5 It is a structural schematic diagram of the road surface base plate of the present invention;

[0029] Figure 6 It is a schematic diagram of the installation structure of the platform chassis hydraulic cylinder and the road surface clamping device of the present invention;

[0030] Figure 7 It is a structural schematic diagram of the platform chassis hydraulic cylinder of the present invention;

[0031] Figure 8 It is a structural schematic diagram of the road surface clamping device of the present invention;

[0032] Fig. 9 A schematic diagram of the installation of the road surface transmission mechanism of the present invention;

[0033] Fig.10 It is a structural schematic diagram of the road surface transmission mechanism and the road surface transmission hydraulic cylinder of the present invention;

[0034] In the figure, 137, road surface; 138, road surface bottom plate; 139, platform frame; 140, road surface clamping device; 141, platform frame hydraulic cylinder; 142, lateral force sensor; 143, longitudinal force sensor; 144, ground balance device; 145, road surface transmission mechanism; 146, road surface transmission hydraulic cylinder; 147. chassis hydraulic cylinder base; 148. chassis hydraulic cylinder barrel; 149. chassis hydraulic cylinder rod; 150. chassis hydraulic cylinder connecting block; 151. clamping hydraulic cylinder barrel; 152. clamping hydraulic cylinder rod; 153. first transition slider; 154. first clamping lever; 155. second clamping lever; 156. clamping connecting plate; 157. clamping fixing block; 158. clamping disk; 159. clamping nut; 160. clamping screw; 161. clamping connecting block; 162. roller shell; 163. roller baffle; 164. small roller; 165. roller motor; 166. roller bottom plate; 167. pavement hydraulic cylinder barrel; 168. pavement hydraulic cylinder rod; 169. second transition slider; 170. bottom plate base. DETAILED DESCRIPTION

[0035] The technical features of the present invention are further described below in conjunction with the accompanying drawings and specific embodiments.

[0036] like Figures 1 to 5 As shown, the present invention is a tread block stiffness test platform, comprising a pavement 137, a pavement base plate 138, and a platform frame 139; an internal cavity is arranged on the upper surface of the platform frame 139, the pavement base plate 138 is arranged in the internal cavity, the pavement base plate 138 slides relative to the platform frame 139 in a direction perpendicular to the pavement base plate 138, and the pavement 137 is arranged on the pavement base plate 138 and is located in the middle of the upper surface of the pavement base plate 138; a pavement sensor assembly is arranged in the platform frame 139, and the pavement sensor assembly is in contact with the pavement base plate 138; a plurality of pavement clamping devices are arranged on the platform frame 139, one end of the pavement clamping device is connected to the platform frame 139, and the other end of the pavement clamping device is in contact with the surface of the pavement 137; the platform frame 139 is connected to a lifting adjustment assembly for adjusting the angle and height of the platform frame 139, and the lifting adjustment assembly is connected to the loading frame of the tread block stiffness test platform.

[0037] like Figure 1 , Figure 6 and Figure 7As shown, the lifting and adjusting assembly includes a plurality of platform frame hydraulic cylinders 141, one end of the platform frame hydraulic cylinder 141 is hinged to the platform frame 139, and the other end of the platform frame hydraulic cylinder is hinged to the loading frame of the pattern block stiffness test platform; the platform frame hydraulic cylinder 141 includes a frame hydraulic cylinder base 147, a frame hydraulic cylinder barrel 148, a frame hydraulic cylinder rod 149 and a frame hydraulic cylinder connecting block 150; the frame hydraulic cylinder base 147 is fixedly arranged on the loading frame of the pattern block stiffness test platform by bolts, and the end of the frame hydraulic cylinder barrel 148 is hinged to the frame hydraulic cylinder base 147; the frame hydraulic cylinder rod 149 is arranged in the frame hydraulic cylinder barrel 148 and slides with the frame hydraulic cylinder barrel 148, the end of the frame hydraulic cylinder rod 149 is hinged to the frame hydraulic cylinder connecting block 150, and the frame hydraulic cylinder connecting block 150 is fixedly arranged on the platform frame 139 by bolts.

[0038] The platform chassis hydraulic cylinder 141 can support and adjust the height of the platform chassis 139, and the angle of the platform chassis 139 can be adjusted by forming different lengths through each platform chassis hydraulic cylinder 141, thereby adjusting the height and angle of the road surface 137, and simulating the stress of the tread block under the driving state of different road surface angles during the tread block detection process. The platform chassis hydraulic cylinder 141 is hinged with the platform chassis 139 and the loading frame of the tread block stiffness test platform, so as to facilitate the adjustment of the relative height and relative angle between the platform chassis 139 and the loading frame of the tread block stiffness test platform, and then adjust the height and angle of the road surface 137 and the road surface bottom plate 138 in the platform chassis 139, so as to facilitate the detection of the stress of the tread block under various road conditions.

[0039] like Figure 2 and Figure 3 As shown, the road surface sensor assembly includes a plurality of lateral force sensors 142 and a plurality of longitudinal force sensors 143, and the lateral force sensors 142 and the longitudinal force sensors 143 are arranged between the internal cavity of the platform base frame 139 and the road surface base plate 138; an annular protrusion is arranged on the surface of the bottom end surface of the internal cavity of the platform base frame 139 on the road surface base plate 138; one end of the lateral force sensor 142 contacts the side surface of the annular protrusion, and the other end of the lateral force sensor 142 is fixed to the inner surface of the internal cavity of the platform base frame 139; one end of the longitudinal force sensor 143 contacts the lower surface of the road surface base plate 138, and the other end of the longitudinal force sensor 143 is fixed to the inner surface of the internal cavity of the platform base frame 139.

[0040] A lateral force sensor 142 is provided in the internal cavity of the platform chassis 139 to measure the lateral force caused by the tread block during the test. A longitudinal force sensor 143 is provided in the internal cavity of the platform chassis 139 to measure the longitudinal force caused by the tread block during the test. The road surface 137 and the road surface base plate 138 used for the test are clamped and fixed by the road surface clamping device 140. When the tread block moves laterally or longitudinally along the horizontal direction of the road surface 137, the road surface base plate 138 will also tend to move horizontally, thereby compressing or stretching the lateral force sensor 142 and the longitudinal force sensor 143 to generate relevant lateral force or longitudinal force. After measuring the displacement of the tread block, the lateral stiffness or longitudinal stiffness of the tread block is finally obtained according to force = displacement × stiffness.

[0041] like Figure 2 and Figure 3 As shown, the pavement sensor assembly also includes a plurality of ground scale devices 144, which are evenly distributed in the internal cavity of the platform base frame 139, one end of the ground scale device 144 is arranged in the internal cavity of the platform base frame 139 and is fixedly connected to the platform base frame 139, and the other end of the ground scale device 144 is in contact with the lower surface of the pavement base plate 138; the ground scale device 144 is in uniform contact with the edge of the lower surface of the pavement base plate 138.

[0042] When the tread block moves vertically downward, the pavement base plate 138 is compressed, and the pavement base plate 138 further compresses the ground balance device 144, thereby generating a radial force in the vertical direction. The radial stiffness of the tread block is finally calculated according to the relevant formula.

[0043] There are eight lateral force sensors 142 , and four lateral force sensors 142 are respectively arranged on both sides of the annular protrusion on the lower surface of the pavement base plate 138 ; there are twelve longitudinal force sensors 143 , and the longitudinal force sensors 143 are evenly divided into two groups and are respectively in uniform contact with both sides of the lower surface of the pavement base plate 138 .

[0044] The eight lateral force sensors 142 and the twelve longitudinal force sensors 143 are evenly distributed between the pavement base plate 138 and the platform base frame 139, so that the force at each position of the pavement base plate 138 can be evenly transmitted and measured.

[0045] like Figure 8As shown, the road surface clamping device 140 includes a first clamping lever 154, a second clamping lever 155, a clamping connecting plate 156, a clamping fixing block 157, a clamping disc 158, and a clamping connecting block 161; a clamping power device is arranged on the side surface of the platform chassis 139, and one end of the clamping power device is hinged to the side surface of the platform chassis 139; the clamping connecting block 161 is arranged in the clamping connecting plate 156 and is hinged to the clamping connecting plate 156, the clamping connecting plate 156 is fixed to the clamping fixing block 157 by bolts, and the clamping fixing block 157 is fixedly connected to the road surface base plate 138; the lower part of the middle section of the first clamping lever 154 is hinged to the clamping connecting plate 156 through the clamping connecting block 161, and the lower part of the middle section of the first clamping lever 154 is hinged to the clamping connecting block 161; one end of the first clamping lever 154 is hinged to the clamping power device, and the first clamping lever 154 the lower middle portion of the second clamping lever 155 is hinged to the clamping connecting plate 156, one end of the second clamping lever 155 is hinged to the first clamping lever 154, and the other end of the second clamping lever 155 is provided with a clamping disk 158.

[0046] When the road surface 137 needs to be clamped and fixed, the clamping power device retracts, driving the first clamping lever 154 to move downward, and the clamping connecting block 161 rotates in the direction toward the road surface 137 with the pin shaft at the clamping connecting plate 156 as the center, thereby driving the first clamping lever 154 to move obliquely in the direction close to the road surface 137, and then driving the second clamping lever 155 to rotate in the direction close to the road surface 137 with the pin shaft at the clamping connecting plate 156 as the center, so that the end of the second clamping lever 155 moves downward, and further the clamping plate 158 installed at the end of the second clamping lever 155 moves downward, so that the clamping plate 158 is close to the clamping road surface 137.

[0047] The clamping power device includes a clamping hydraulic cylinder 151, a clamping hydraulic cylinder rod 152 and a first transition slider 153; the clamping hydraulic cylinder 151 is hinged to the side surface of the platform base frame 139, the clamping hydraulic cylinder rod 152 is arranged in the clamping hydraulic cylinder 151 and is in sliding contact with the inner surface of the clamping hydraulic cylinder 151, and the end of the clamping hydraulic cylinder rod 152 is hinged to the end of the first clamping lever 154 through the first transition slider 153.

[0048] The clamping hydraulic cylinder 151 and the clamping hydraulic cylinder rod 152 of the clamping power device are respectively hinged to the side surface of the platform frame 139 and the end of the first clamping lever 154. The clamping hydraulic cylinder rod 152 pushes the movement of the first clamping lever 154 to achieve clamping and fixing of the road surface 137.

[0049] A clamping nut 159 and a clamping screw 160 are provided at the end of the second clamping lever 155. The clamping screw 160 passes through the end of the second clamping lever 155 and is vertically arranged with the second clamping lever 155. Two clamping nuts 159 are threadedly connected to the clamping screw 160, and the clamping nuts 159 are in contact with the surface of the second clamping lever 155. The clamping plate 158 is fixedly arranged at the end of the clamping screw 160.

[0050] By adjusting the position of the clamping nut 159 on the clamping screw 160, the length of the clamping screw 160 passing through the end of the second clamping lever 155 can be adjusted, thereby adjusting the relative distance between the clamping plate 158 and the end of the second clamping lever 155, and adjusting the clamping condition of the clamping plate 158 on the road surface 137 to meet the clamping and fixing requirements of road surfaces 137 of different thicknesses.

[0051] like Fig. 9 and Fig.10 As shown, a road surface transmission mechanism 145 is arranged inside the platform frame 139, and the road surface transmission mechanism is connected to a plurality of road surface transmission hydraulic cylinders 146, and the cylinder barrels of the road surface transmission hydraulic cylinders 146 are installed in the internal cavity of the platform frame 139; a bottom plate base 170 is arranged in the internal cavity of the platform frame 139, and the hydraulic rods of the road surface transmission hydraulic cylinders 146 are in contact with the bottom plate base 170.

[0052] The pavement transmission hydraulic cylinder 146 is installed on the bottom inner side of the pavement base plate 138. The extension and retraction of the cylinder rod of the pavement transmission hydraulic cylinder 146 can drive the pavement 137 and its transmission mechanism to slide up and down, and further make the pavement 137 slide up and down, which can be used for the transportation and unloading of the pavement 137.

[0053] The road surface transmission mechanism includes a small roller 164, a roller baffle 163, a roller motor 165, a roller shell 162 and a roller bottom plate 166; the roller baffle 163 is U-shaped, the small roller 164 is arranged in the U-shaped opening of the roller baffle 163 and is connected to the roller baffle 163 through a pin shaft, and each small roller 164 is connected to a roller motor 165; the roller bottom plate 166 is arranged in the annular protrusion of the road surface bottom plate 138, and the roller bottom plate 166 slides relative to the road surface bottom plate 138 in a direction perpendicular to the roller bottom plate 166; the small roller 164 is installed inside the roller baffle 163, and the two are connected by a pin shaft. There are two roller baffles 163 in total, and a number of small rollers 164 are installed in each roller baffle 163, and each small roller 164 are connected to a roller motor 165, and the roller baffle 163 is wrapped by the roller shell 162. The roller shell 162, the roller motor 165, and the roller baffle 163 are all arranged on the roller bottom plate 166; a plurality of bottom plate bases 170 are welded to the upper end of the lower surface of the roller bottom plate 166; the road surface transmission hydraulic cylinder 146 includes a road surface hydraulic cylinder barrel 167, a road surface hydraulic cylinder rod 168, and a second transition slider 169. The road surface hydraulic cylinder barrel 167 is installed on the lower inner side of the internal cavity of the platform frame 139, and the road surface hydraulic cylinder rod 168 is arranged in the road surface hydraulic cylinder barrel 167. The road surface hydraulic cylinder rod 168 is connected to one end of the second transition slider 169 through a pin shaft, and the other end of the second transition slider 169 is connected to the bottom plate base 170 through a pin shaft.

[0054] When the road surface 137 placed on the stiffness test platform needs to be transported, the road surface hydraulic cylinder rod 168 in the road surface transmission hydraulic cylinder 146 extends, so that each small roller 164 of the road surface transmission mechanism 145 is lifted up and in contact with the road surface 137, and the roller motor 165 is started to rotate each small roller 164 to move the road surface 137. When the small roller 164 is not in contact with the road surface 137, the roller motor 165 of the corresponding small roller 164 that is not in contact with the road surface 137 stops rotating until the road surface 137 is transported.

[0055] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should fall within the protection scope of the present invention.

Claims

1. A tread block stiffness testing platform, characterized in that: It comprises a road surface, a road surface base plate, and a platform base frame; an internal cavity is arranged on the upper surface of the platform base frame, the road surface base plate is arranged in the internal cavity, the road surface base plate slides relative to the platform base frame in a direction perpendicular to the road surface base plate, the road surface is arranged on the road surface base plate and is located in the middle of the upper surface of the road surface base plate; a road surface sensor assembly is arranged in the platform base frame, and the road surface sensor assembly is in contact with the road surface base plate; a plurality of road surface clamping devices are arranged on the platform base frame, one end of the road surface clamping device is connected to the platform base frame, and the other end of the road surface clamping device is in contact with the road surface surface; the platform base frame is connected to a lifting adjustment assembly for adjusting the angle and height of the platform base frame, and the lifting adjustment assembly is connected to a loading frame of a tread block stiffness test platform; The lifting and adjusting assembly comprises a plurality of platform frame hydraulic cylinders, one end of the platform frame hydraulic cylinder is hinged to the platform frame, and the other end of the platform frame hydraulic cylinder is hinged to the loading frame of the pattern block stiffness test platform; The road surface sensor assembly includes a plurality of lateral force sensors and a plurality of longitudinal force sensors, which are arranged between the internal cavity of the platform frame and the road surface base plate; an annular protrusion is arranged on the surface of the road surface base plate on the bottom end surface of the internal cavity of the platform frame; one end of the lateral force sensor contacts the side surface of the annular protrusion, and the other end of the lateral force sensor is fixed to the inner surface of the internal cavity of the platform frame; one end of the longitudinal force sensor contacts the lower surface of the road surface base plate, and the other end of the longitudinal force sensor is fixed to the inner surface of the internal cavity of the platform frame.

2. The tread block stiffness testing platform according to claim 1, characterized in that: The platform underframe hydraulic cylinder includes an underframe hydraulic cylinder base, an underframe hydraulic cylinder barrel, an underframe hydraulic cylinder rod and an underframe hydraulic cylinder connecting block; the underframe hydraulic cylinder base is fixed on the loader frame of the pattern block stiffness test platform by bolts, and the end of the underframe hydraulic cylinder barrel is hinged to the underframe hydraulic cylinder base; the underframe hydraulic cylinder rod is arranged in the underframe hydraulic cylinder barrel and slides with the underframe hydraulic cylinder barrel, the end of the underframe hydraulic cylinder rod is hinged to the underframe hydraulic cylinder connecting block, and the underframe hydraulic cylinder connecting block is fixed on the platform underframe by bolts.

3. The tread block stiffness testing platform according to claim 1, characterized in that: The pavement sensor assembly also includes a plurality of ground scale devices, which are evenly distributed in the internal cavity of the platform frame. One end of the ground scale device is arranged in the internal cavity of the platform frame and fixedly connected to the platform frame, and the other end of the ground scale device contacts the lower surface of the pavement base plate; the ground scale device contacts the edge of the lower surface of the pavement base plate evenly.

4. The tread block stiffness testing platform according to claim 1, characterized in that: The number of the lateral force sensors is eight, and four lateral force sensors are respectively arranged on both sides of the annular protrusion on the lower surface of the road surface base plate; the number of the longitudinal force sensors is twelve, and the longitudinal force sensors are evenly divided into two groups and are respectively in uniform contact with both sides of the lower surface of the road surface base plate.

5. The tread block stiffness testing platform according to claim 1, characterized in that: The road surface clamping device includes a first clamping lever, a second clamping lever, a clamping connecting plate, a clamping fixing block, a clamping disk, and a clamping connecting block; a clamping power device is arranged on the side surface of the platform frame, and one end of the clamping power device is hinged to the side surface of the platform frame; the clamping connecting block is arranged in the clamping connecting plate and is hinged to the clamping connecting plate, the clamping connecting plate is fixed to the clamping fixing block by bolts, and the clamping fixing block is fixedly connected to the road surface base plate; the lower middle section of the first clamping lever is hinged to the clamping connecting plate through the clamping connecting block, and the lower middle section of the first clamping lever is hinged to the clamping connecting block; one end of the first clamping lever is hinged to the clamping power device, and the other end of the first clamping lever is hinged to the end of the second clamping lever; the lower middle section of the second clamping lever is hinged to the clamping connecting plate, one end of the second clamping lever is hinged to the first clamping lever, and the other end of the second clamping lever is provided with a clamping disk.

6. The tread block stiffness testing platform according to claim 5, characterized in that: The clamping power device includes a clamping hydraulic cylinder, a clamping hydraulic cylinder rod and a first transition slider; the clamping hydraulic cylinder is hinged to the side surface of the platform frame, the clamping hydraulic cylinder rod is arranged in the clamping hydraulic cylinder and is in sliding contact with the inner surface of the clamping hydraulic cylinder, and the end of the clamping hydraulic cylinder rod is hinged to the end of the first clamping lever through the first transition slider.

7. The tread block stiffness testing platform according to claim 5, characterized in that: A clamping nut and a clamping screw are provided at the end of the second clamping lever. The clamping screw passes through the end of the second clamping lever and is vertically arranged with the second clamping lever. Two clamping nuts are threadedly connected to the clamping screw, and the clamping nuts are in contact with the surface of the second clamping lever. The clamping plate is fixedly arranged at the end of the clamping screw.

8. The tread block stiffness testing platform according to claim 2, characterized in that: A road surface transmission mechanism is arranged inside the platform frame, and the road surface transmission mechanism is connected to a plurality of road surface transmission hydraulic cylinders, and the cylinder barrels of the road surface transmission hydraulic cylinders are installed in the internal cavity of the platform frame; a base plate base is arranged in the internal cavity of the platform frame, and the hydraulic rods of the road surface transmission hydraulic cylinders are in contact with the base plate base.

9. The tread block stiffness testing platform according to claim 8, characterized in that: The road surface transmission mechanism includes a small roller, a roller baffle, a roller motor, a roller shell and a roller bottom plate; the roller baffle is U-shaped, the small roller is arranged in the U-shaped opening of the roller baffle and is connected to the roller baffle through a pin shaft, and each small roller is connected to a roller motor; the roller bottom plate is arranged in the annular protrusion of the road surface bottom plate, and the roller bottom plate slides relative to the road surface bottom plate in a direction perpendicular to the roller bottom plate; the small roller is installed inside the roller baffle, and the two are connected by a pin shaft. There are two roller baffles in total, and a number of small rollers are installed in each roller baffle. The rollers are connected to a roller motor, and the roller baffle is wrapped by a roller shell. The roller shell, roller motor and roller baffle are all arranged on the roller bottom plate; a plurality of bottom plate bases are welded on the upper end of the lower surface of the roller bottom plate; the road surface transmission hydraulic cylinder includes a road surface hydraulic cylinder barrel, a road surface hydraulic cylinder rod and a second transition slider. The road surface hydraulic cylinder barrel is installed on the lower inner side of the internal cavity of the platform chassis, and the road surface hydraulic cylinder rod is arranged in the road surface hydraulic cylinder barrel. The road surface hydraulic cylinder rod is connected to one end of the second transition slider through a pin shaft, and the other end of the second transition slider is connected to the bottom plate base through a pin shaft.

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