Impact resistance testing device for pneumatic tire

Abstract

The utility model relates to an impact resistance testing device for a pneumatic tire. The impact resistance testing device comprises a rack; the clamping component comprises a rotating shaft and a baffle disc, the baffle disc is arranged at the head end of the rotating shaft, a plurality of screws are arranged on the front face of the baffle disc in the circumferential direction and used for fixing the pneumatic tire, and the rotating shaft is rotationally connected with the rack; the driving mechanism is mounted on the back surface of the rack and is used for driving the rotating shaft to rotate; the impact mechanism comprises a hydraulic push rod, and an impact head is arranged at the telescopic end of the hydraulic push rod; the pressure applying mechanism comprises a pressure applying block and a displacement component, the displacement component is arranged below the pneumatic tire, and the position of the pressure applying block is adjusted through the displacement component. According to the impact resistance testing device for the pneumatic tire, the impact resistance of the tire can be tested under the condition of providing friction and pressure, the impact resistance testing numerical value of the pneumatic tire is more accurate, and axial force can be applied to the pneumatic tire, so that the tire knocking-over resistance of the pneumatic tire is tested.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic tire impact resistance performance testing, in particular to a pneumatic tire impact resistance testing device. Background Art

[0002] Pneumatic tires are tubeless pneumatic tires, also called "low-pressure tires" or "pneumatic tires". They are made by filling elastic bladders with compressed air to mitigate vibration and impact during movement.

[0003] In the application of pneumatic tires, they will be impacted. In order to ensure that the pneumatic tires will not cause safety accidents due to insufficient impact resistance during use, the tires need to be sampled and impact tested after production to ensure that the tire performance meets the specified requirements. The prior art, such as the Chinese authorized patent with publication number CN210166115U, a tire impact test device, drives the cam to rotate, thereby pressing the pressure wheel down, thereby testing the impact resistance of the tire. In the impact test, it does not take into account the pressure of various parts of the vehicle body in actual application (the gas in the tire will be partially compressed), and does not take into account the friction of the tire during vehicle driving (friction will cause the tire surface to heat up). In this way, the tire test data is inaccurate. In addition, it actually only performs impact tests on the radial direction of the tire, but does not test the impact of the tire in the axial direction. In this way, it is impossible to detect the tire bead resistance of the pneumatic wheel when an axial impact is applied. For this reason, a pneumatic tire impact test device is proposed. Utility Model Content

[0004] Based on the above description, the utility model provides a pneumatic tire impact resistance testing device, which can test the impact resistance of the tire while providing friction and pressure, making the pneumatic tire impact resistance test value more accurate, and can apply axial force to the pneumatic tire, thereby completing the test of the pneumatic tire bead unseating resistance.

[0005] The technical solution of the utility model is as follows: a pneumatic tire impact resistance testing device, comprising:

[0006] frame;

[0007] The clamping component includes a rotating shaft and a baffle plate. The baffle plate is arranged at the head end of the rotating shaft. A plurality of screws are arranged on the front side of the baffle plate along the circumferential direction for fixing the pneumatic tire. The rotating shaft is rotatably connected to the frame.

[0008] A driving mechanism, which is installed on the back of the frame and is used to drive the rotating shaft to rotate;

[0009] The impact mechanism comprises a hydraulic push rod, at the telescopic end of which an impact head is provided;

[0010] The pressure mechanism includes a pressure block and a displacement component, wherein the displacement component is arranged below the pneumatic tire, the pressure block adjusts its position through the displacement component, applies pressure to the pneumatic tire, and generates friction with the pneumatic tire during testing.

[0011] On the basis of the above technical solution, the present invention can also be improved as follows.

[0012] Furthermore, the cross section of the pressure block is U-shaped and has a groove, and the pressure block is attached to the outside of the pneumatic tire through the groove.

[0013] Furthermore, it also includes a rotation adjustment mechanism, which includes a base plate, a support and a rotation adjustment component, wherein the support is fixed on the base plate, and there is a spacing space between the base plate and the support. The rotation adjustment component is located in this spacing space and is arranged on the base plate. The rotation adjustment component is used to drive the pressure mechanism to rotate as a whole to test the bead unseating resistance of the pneumatic tire.

[0014] Furthermore, the rotary adjustment component includes a central shaft column, a transmission gear, a rack and an electric push rod, wherein the central shaft column can be rotatably connected to the base plate, and its top end is connected to the pressure mechanism, the transmission gear is assembled on the outside of the central shaft column, the electric push rod is arranged on the base plate, and the rack is arranged at the telescopic end of the electric push rod and meshes with the transmission gear.

[0015] Furthermore, the displacement component includes a displacement frame, a screw rod and a nut seat, wherein the displacement frame is arranged below the pneumatic tire and has a sliding cavity, the nut seat is slidably connected in the sliding cavity and is threadedly connected to the screw rod, an extension column is fixed between the nut seat and the pressure block, a rotating cap is fixed at one end of the screw rod, the screw rod rotates when the rotating cap rotates, and allows the nut seat to slide along the sliding cavity.

[0016] Furthermore, the left, right and front sides of the frame all have open areas.

[0017] Furthermore, the driving mechanism includes a bracket, a motor and a transmission component. The bracket is arranged on the back of the frame, the motor is arranged on the bracket, and the transmission component is used to drive the rotating shaft to rotate when the motor is working.

[0018] Furthermore, the transmission component includes a transmission wheel 1, a transmission wheel 2 and a belt, wherein the transmission wheel 1 is assembled at the output end of the motor, the transmission wheel 2 is assembled at the tail end of the rotating shaft, and the belt drive is connected between the outer sides of the transmission wheel 1 and the transmission wheel 2.

[0019] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0020] 1. The pneumatic tire impact resistance testing device utilizes a driving mechanism to drive the pneumatic tire fixed by the clamping component to rotate, thereby realizing the rotation simulation of the pneumatic tire, and utilizes an impact mechanism to perform a radial impact resistance test on the pneumatic tire in the rotating or non-rotating simulation, and utilizes a pressure mechanism to apply pressure to the pneumatic tire and generate friction with the pneumatic tire during the test, so as to make the test simulation more realistic and complete, thereby ensuring the accuracy of the test results.

[0021] 2. The pneumatic tire impact resistance testing device can apply axial force to the pneumatic tire by means of a rotary adjustment mechanism, thereby completing the test of the bead-off resistance of the pneumatic tire. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic structural diagram of a pneumatic tire impact resistance testing device provided by an embodiment of the utility model;

[0023] Figure 2 for Figure 1 Schematic diagram of the structure when viewed in cross section;

[0024] Figure 3 for Figure 1 A partial enlarged schematic diagram of area A in the middle.

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 1. Frame; 2. Clamping component; 21. Rotating shaft; 22. Baffle plate; 23. Screw rod; 3. Driving mechanism; 31. Bracket; 32. Motor; 33. Transmission wheel 1; 34. Transmission wheel 2; 35. Belt; 4. Impact mechanism; 41. Hydraulic push rod; 42. Impact head; 5. Pressure mechanism; 51. Pressure block; 52. Displacement component; 521. Displacement frame; 522. Screw rod; 523. Nut seat; 524. Sliding cavity; 525. Extension column; 6. Rotation mechanism; 61. Base plate; 62. Support; 63. Center shaft column; 64. Transmission gear; 65. Rack; 66. Electric push rod. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0028] like Figure 1 and Figure 2As shown, a pneumatic tire impact resistance testing device in this embodiment includes a frame 1, a clamping component 2, a driving mechanism 3, an impact mechanism 4 and a pressure mechanism 5, wherein the clamping component 2 is used to fix the pneumatic tire, the driving mechanism 3 is used to drive the pneumatic tire fixed by the clamping component 2 to rotate, so as to realize the rotation simulation of the pneumatic tire, and the impact mechanism 4 is used to perform radial impact resistance test on the pneumatic tire in rotation or non-rotation simulation, and the pressure mechanism 5 applies pressure to the pneumatic tire and generates friction with the pneumatic tire during the test, so as to make the test simulation more realistic and complete, so as to ensure the accuracy of the test results.

[0029] To facilitate understanding of the above-mentioned frame 1, clamping component 2, driving mechanism 3, impact mechanism 4 and pressure mechanism 5, further description will be given here.

[0030] First, if Figure 1 and 2 As shown, the left, right and front sides of the frame 1 all have open areas, that is, the frame 1 is composed of an L-shaped plate and two groups of legs, and the area between the legs and the L-shaped plate is a working area, which is used for performing impact resistance tests on pneumatic tires.

[0031] Secondly, the description of the clamping component 2 is as follows: Figure 1 As shown, the clamping component 2 includes a rotating shaft 21 and a baffle plate 22. The baffle plate 22 is fixed at the head end of the rotating shaft 21 by bolts. The diameter of the baffle plate 22 is determined according to the diameter of the pneumatic tire, but it is necessary to ensure that the diameter is smaller than the inner diameter of the pneumatic tire. A plurality of screws 23 are arranged along the circumferential direction on the front side of the baffle plate 22 for fixing the pneumatic tire. The rotating shaft 21 is rotatably connected to the frame 1, so that the driving mechanism 3 can drive the pneumatic tire fixed by the clamping component 2 to rotate when working, thereby realizing the rotation simulation of the pneumatic tire.

[0032] And as Figure 2 As shown, the driving mechanism 3 is installed on the back of the frame 1 and is used to drive the rotating shaft 21 to rotate.

[0033] As a preferred solution of the driving mechanism 3, Figure 2 As shown, the driving mechanism 3 includes a bracket 31, a motor 32 and a transmission component. The bracket 31 is in the shape of a plate and is welded to the back of the frame 1. The motor 32 is fixed to the bracket 31 by bolts. The transmission component is used to drive the rotating shaft 21 to rotate when the motor 32 is working.

[0034] Further explanation, such as Figure 2 As shown, the transmission component includes a transmission wheel 1 33, a transmission wheel 2 34 and a belt 35, wherein the transmission wheel 1 33 is assembled at the output end of the motor 32, the transmission wheel 2 34 is assembled at the tail end of the rotating shaft 21, and the belt 35 is connected between the outer sides of the transmission wheel 1 33 and the transmission wheel 2 34.

[0035] Of course, it can be understood that, in a certain embodiment, the transmission component in the above-mentioned driving mechanism 3 can also adopt gear transmission, and it is only necessary to ensure that the clamping component 2 and the inflatable tire fixed by it can rotate when the motor 32 is working.

[0036] During operation, after the clamping component 2 fixes the pneumatic tire, the motor 32 is started, and the motor 32 drives the transmission wheel 1 33 to rotate. Through the transmission of the belt 35, the transmission wheel 2 34 can drive the rotating shaft 21 and the pneumatic tire fixed by the clamping component 2 to rotate, thereby completing the simulation of impact tire driving.

[0037] To complete the pneumatic tire, radial impact test is performed, such as Figure 2 As shown, the impact mechanism 4 includes a hydraulic push rod 41 , which is preferably fixed to the top of the frame 1 by bolts, and an impact head 42 is provided at the telescopic end of the hydraulic push rod 41 .

[0038] It should be noted that the stroke of the hydraulic push rod 41 is also determined according to actual conditions, and its telescopic stroke must not be less than the distance between the impact head 42 and the pneumatic tire, so as to ensure that the impact mechanism 4 can successfully complete the radial impact resistance test of the pneumatic tire in rotating or non-rotating simulation.

[0039] For the description of the pressure applying mechanism 5, Figure 1-3 As shown, the pressure mechanism 5 includes a pressure block 51 and a displacement component 52, wherein the displacement component 52 is arranged below the pneumatic tire, and the pressure block 51 adjusts its position through the displacement component 52 to apply pressure to the pneumatic tire and generate friction with the pneumatic tire during testing.

[0040] Further explanation, such as Figure 3 As shown, the displacement component 52 in the pressure mechanism 5 includes a displacement frame 521, a screw rod 522 and a nut seat 523, wherein the displacement frame 521 is arranged below the pneumatic tire and has a sliding cavity 524, the nut seat 523 is slidably connected in the sliding cavity 524, and is threadedly connected to the screw rod 522, and an extension column 525 is fixed between the nut seat 523 and the pressure block 51, so that when the nut seat 523 moves, the extension column 525 can drive the pressure block 51 to move synchronously, thereby changing the position of the pressure block 51, that is, adjusting the force applied to the pneumatic tire, where the applied force simulates the force of the tire being subjected to the actual weight of the vehicle body, and a rotating cap is fixed at one end of the screw rod 522, the screw rod 522 rotates when the rotating cap rotates, and allows the nut seat 523 to slide along the sliding cavity 524.

[0041] At this time, during operation, the pneumatic tire is fixed to the baffle 22 using the screw 23, and the rotating cap is turned to rotate the screw 522, while the nut seat 523, the extension column 525 and the pressure block 51 are displaced until the pressure block 51 applies pressure to the pneumatic tire. The motor 32 is then started, and the motor 32 drives the transmission wheel 1 33 to rotate. Through the transmission of the belt 35, the transmission wheel 2 34 can drive the rotating shaft 21 and the pneumatic tire fixed by the clamping component 2 to rotate. The hydraulic push rod 41 is then started to allow the impact head 42 to impact the pneumatic tire, thereby making the test simulation more realistic and complete to ensure the accuracy of the test results.

[0042] To complete the test of the bead unseating resistance of the pneumatic tire, in a certain embodiment, as Figure 2 As shown, the pneumatic tire impact resistance testing device also includes a rotation adjustment mechanism 6, which includes a base plate 61, a support 62 and a rotation adjustment component, wherein the support 62 is fixed on the base plate 61, and there is a spacing space between the base plate 61 and the support 62. The rotation adjustment component is located in this spacing space and is arranged on the base plate 61. The rotation adjustment component is used to drive the pressure mechanism 5 to rotate as a whole to test the bead unseating resistance of the pneumatic tire.

[0043] To further explain, the rotary adjustment component includes a central shaft column 63, a transmission gear 64, a rack 65 and an electric push rod 66, wherein the central shaft column 63 is rotatably connected to the base plate 61, and its top end is connected to the pressure mechanism 5, the transmission gear 64 is fixedly assembled on the outside of the central shaft column 63, the electric push rod 66 is arranged on the base plate 61, and the rack 65 is arranged at the telescopic end of the electric push rod 66 and meshes with the transmission gear 64.

[0044] It should be noted that the cross section of the pressure block 51 is preferably U-shaped with a groove. The pressure block 51 is attached to the outside of the pneumatic tire through the groove, and the width of the groove is not less than the width of the pneumatic tire.

[0045] When testing the bead-off resistance of the pneumatic tire, there is no need to start the driving mechanism 3. It is only necessary to adjust the pressure block 51 to fit the pneumatic tire. That is, when the pressure block 51 fits the outside of the pneumatic tire through the groove, the position of the rack 65 is adjusted by utilizing the telescopic characteristics of the electric push rod 66, and the transmission gear 64 drives the central shaft column 63 and the pressure mechanism 5 to rotate. During the rotation of the pressure block 51 around the central shaft column 63, force is applied to the pneumatic tire, thereby completing the bead-off resistance test of the pneumatic tire.

[0046] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. A pneumatic tire impact resistance testing device, characterized in that: include: Rack(1); A clamping component (2) comprises a rotating shaft (21) and a baffle plate (22), wherein the baffle plate (22) is arranged at the head end of the rotating shaft (21), and a plurality of screw rods (23) are arranged on the front side of the baffle plate along the circumferential direction for fixing the pneumatic tire, and the rotating shaft (21) is rotatably connected to the frame (1); A driving mechanism (3) mounted on the back of the frame (1) and used to drive the rotating shaft (21) to rotate; An impact mechanism (4) comprises a hydraulic push rod (41), wherein an impact head (42) is provided at the telescopic end of the hydraulic push rod (41); The pressure-applying mechanism (5) comprises a pressure-applying block (51) and a displacement component (52), wherein the displacement component (52) is arranged below the pneumatic tire, and the pressure-applying block (51) adjusts its position through the displacement component (52), applies pressure to the pneumatic tire, and generates friction with the pneumatic tire during testing.

2. The pneumatic tire impact resistance testing device according to claim 1, characterized in that: The pressure block (51) has a U-shaped cross section and has a groove, and the pressure block (51) is attached to the outside of the pneumatic tire through the groove.

3. The pneumatic tire impact resistance testing device according to claim 2, characterized in that: The invention also comprises a rotation adjustment mechanism (6), wherein the rotation adjustment mechanism (6) comprises a base plate (61), a support (62) and a rotation adjustment component, wherein the support (62) is fixed on the base plate (61), and a spacing space is provided between the base plate (61) and the support (62). The rotation adjustment component is located in the spacing space and is arranged on the base plate (61), and is used to drive the pressure applying mechanism (5) to rotate as a whole, so as to test the bead unseating resistance of the pneumatic tire.

4. The pneumatic tire impact resistance testing device according to claim 3, characterized in that: The rotary adjustment component comprises a central shaft column (63), a transmission gear (64), a rack (65) and an electric push rod (66), wherein the central shaft column (63) is rotatably connected to the base plate (61), and its top end is connected to the pressure mechanism (5), the transmission gear (64) is assembled on the outside of the central shaft column (63), the electric push rod (66) is arranged on the base plate (61), and the rack (65) is arranged at the telescopic end of the electric push rod (66) and meshes with the transmission gear (64).

5. A pneumatic tire impact resistance testing device according to any one of claims 1 to 4, characterized in that: The displacement component (52) comprises a displacement frame (521), a screw rod (522) and a nut seat (523), wherein the displacement frame (521) is arranged below the pneumatic tire and has a sliding cavity (524), the nut seat (523) is slidably connected in the sliding cavity (524) and is threadedly connected to the screw rod (522), an extension column (525) is fixed between the nut seat (523) and the pressure block (51), a rotating cap is fixed to one end of the screw rod (522), the screw rod (522) rotates when the rotating cap rotates, and allows the nut seat (523) to slide along the sliding cavity (524).

6. The pneumatic tire impact resistance testing device according to claim 1, characterized in that: The left, right and front sides of the frame (1) all have open areas.

7. The pneumatic tire impact resistance testing device according to claim 1, characterized in that: The driving mechanism (3) comprises a bracket (31), a motor (32) and a transmission component, wherein the bracket (31) is arranged on the back of the frame (1), the motor (32) is arranged on the bracket (31), and the transmission component is used to drive the rotating shaft (21) to rotate when the motor (32) is working.

8. The pneumatic tire impact resistance testing device according to claim 7, characterized in that: The transmission component comprises a transmission wheel 1 (33), a transmission wheel 2 (34) and a belt (35), wherein the transmission wheel 1 (33) is mounted on the output end of the motor (32), the transmission wheel 2 (34) is mounted on the tail end of the rotating shaft (21), and the belt (35) is connected between the outer sides of the transmission wheel 1 (33) and the transmission wheel 2 (34).

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