A testing device for automobile tire production

Abstract

The present application relates to the technical field of testing equipment for automobile tire production, and particularly relates to a testing device for automobile tire production. A test bench is provided with a driving member, a U-shaped frame fixed to the telescopic end of the driving member, a sliding frame connected to the test bench and the U-shaped frame, a fixing seat fixed to the sliding frame, and an extrusion member connected to the fixing seat. The present application separates the existing electrically-controlled hydraulic push rod in the puncture part from the sharp object, and automatically disconnects the connection between the telescopic part of the electrically-controlled hydraulic push rod and the sharp object in case of an accident. Even if the telescopic part of the electrically-controlled hydraulic push rod continues to extend, it will not drive the sharp object to continue moving, thereby avoiding the distortion of the puncture value caused by the continuous movement of the sharp object, ensuring the accuracy of the test results and protecting the wheel hub from damage caused by excessive extrusion.

Description

Technical Field

[0001] This invention relates to the technical field of testing equipment for automobile tire production, and more particularly to a testing device for automobile tire production. Background Technology

[0002] Car tires are critical components that ensure vehicle safety and performance, and therefore undergo rigorous testing during the production process. The following are the main reasons why this testing is necessary:

[0003] 1. Ensure safety: Tire safety is directly related to the lives of drivers and passengers. Testing can verify the performance of tires under various conditions and ensure that they meet safety standards.

[0004] 2. Improved durability: Testing helps manufacturers assess tire wear resistance and lifespan, ensuring they maintain good performance over long-term use;

[0005] Safety and durability tests include: static load test, rolling resistance test, durability test, wet slip resistance test, puncture test, etc.

[0006] The existing equipment used in puncture testing is typically a puncture machine, which consists of a puncture unit, a fixing unit, a pressure sensor, and a control terminal. Its working principle is as follows: the tire to be tested is mounted on the fixing unit, and then the puncture unit inserts a sharp object into the tire surface at a set speed and force. The pressure sensor records the values ​​during the puncture process. When the tire surface is punctured, the pressure in the pressure sensor is instantly released, and the pressure sensor then transmits the signal to the control terminal. However, in actual operation, the electro-hydraulic push rod inside the puncture unit may experience electrical failures due to prolonged use. Furthermore, if the experimenter accidentally touches a control button or other critical components during the experiment, causing abnormal movement of the puncture rod, this may lead to the following problems:

[0007] 1. Unable to stop moving: The telescopic part of the electro-hydraulic push rod may not stop in time during the puncture process, causing the puncture depth to exceed the predetermined value;

[0008] 2. Data distortion: The puncture value no longer meets the test standard, and the data recorded by the pressure sensor will lose its reference value and cannot accurately reflect the tire's true puncture resistance performance. Summary of the Invention

[0009] To address the problems mentioned in the background section, the present invention provides a testing device for automobile tire production.

[0010] The technical solution of this invention is: a testing device for automobile tire production, comprising:

[0011] Test bench;

[0012] The driving component is disposed within the test bench;

[0013] A U-shaped frame is fixed to the telescopic end of the driving component. The test bench and the U-shaped frame are slidably connected to a sliding frame. There is a gap between the sliding frame and the driving end of the driving component.

[0014] A fixed base is fixedly connected to the sliding frame, and a pressing member is slidably connected to the fixed base;

[0015] A pressure sensing element is disposed within the fixed base and in contact with the extrusion member;

[0016] A limiting component is disposed on the U-shaped frame for connecting the sliding frame and the U-shaped frame;

[0017] An unlocking component, located within the sliding frame, is used to unlock the sliding frame and the U-shaped frame.

[0018] Preferably, the limiting component includes:

[0019] The first limiting pin is slidably connected to the sliding frame. The first limiting pin is used to limit the U-shaped frame. A first tension spring is fixed between the first limiting pin and the sliding frame.

[0020] Preferably, the unlocking component includes a Z-shaped rod slidably connected within the sliding frame;

[0021] The second limiting pin is slidably connected to the sliding frame. The second limiting pin is used to limit the first limiting pin. The Z-shaped rod has a groove on the side near the first limiting pin. The second limiting pin slides along the groove on the Z-shaped rod.

[0022] The first sliding block is fixedly connected to the Z-shaped rod and slidably connected to the sliding frame. A second tension spring is fixedly connected between the first sliding block and the sliding frame.

[0023] The second sliding block is slidably connected inside the test bench, and the second sliding block is used to press the first sliding block.

[0024] Preferably, the unlocking component further includes:

[0025] An adjustment component, disposed within the test bench, is used to adjust the position of the second sliding block. The adjustment component includes:

[0026] A knob is slidably connected to the test bench and is subject to friction therewith. The knob is splinedly connected to a gear shaft, which is rotatably connected to the test bench.

[0027] A rack frame is slidably connected within the test bench, and the rack frame is fixedly connected to the second sliding block and meshes with the gear shaft.

[0028] Preferably, the U-shaped frame is rotatably connected to a swing element that contacts the sliding frame.

[0029] Preferably, the axis of the extruder coincides with the axis of the telescopic part of the drive member, and the center line of the swing member coincides with the axes of both the extruder and the telescopic part of the drive member.

[0030] Preferably, an elastic element is fixedly connected between the swing member and the sliding frame.

[0031] Preferably, the sliding frame is slidably connected to a connecting frame that is fixedly connected to the first limiting pin. Both the connecting frame and the U-shaped frame are fixedly connected to a stop block for limiting the swing member. The swing member is provided with symmetrically distributed first arc surfaces, and the stop block is provided with a second arc surface that fits against the adjacent first arc surface on the swing member.

[0032] Preferably, it further includes:

[0033] A detection component, disposed on the test bench, is used to detect the distance the extruded part moves. The detection component includes:

[0034] The U-shaped frame is slidably connected to the test bench and is subject to friction with it;

[0035] The fixed frame is splinedly connected to the extruder;

[0036] The symmetrically distributed connecting ropes are all slidably connected to the sliding frame and fixedly connected to the fixed frame. The ends of the symmetrically distributed connecting ropes away from the fixed frame are all fixedly connected to the U-shaped frame.

[0037] A connecting component, disposed within the extruder, is used to connect the extruder and the fixing frame.

[0038] Preferably, the connection component includes:

[0039] A fixed column is fixedly connected to the extrusion member, and the fixed column is fixedly connected to elastic telescopic rods distributed in a ring array;

[0040] The number of extrusion frames distributed in a ring array is the same as that of the elastic telescopic rods. They are all slidably connected to the extrusion member and fixed to the telescopic ends of the adjacent elastic telescopic rods. The extrusion frames are used to extrude the fixed frame.

[0041] An extrusion seat is slidably connected to the extrusion member and is used to extrude the extrusion frame distributed in a ring array. A spring is fixed between the extrusion seat and the fixed column.

[0042] This invention has the following advantages: To address the problems of electrical components in the existing electro-hydraulic push rod in the puncture section malfunctioning due to prolonged use, resulting in puncture values ​​no longer meeting test standards and data recorded by the pressure sensor losing its reference value, this invention proposes an improved solution, specifically as follows: This invention adopts a method of separately fixing the existing electro-hydraulic push rod in the puncture section to the sharp object. In case of an accident, the connection between the telescopic part of the electro-hydraulic push rod and the sharp object is automatically disconnected. Even if the telescopic part of the electro-hydraulic push rod continues to extend, it will not cause the sharp object to continue moving, thereby avoiding the distortion of puncture values ​​caused by the continued movement of the sharp object. This ensures the accuracy of the test results while also protecting the wheel hub from damage due to excessive compression.

[0043] Existing pressure sensors wear out faster with increasing test loads when testing tire puncture resistance, leading to decreased sensitivity and accuracy, which affects the accuracy and reliability of test results. To solve the above problems, this invention adopts a combination of physical and electrical testing to provide a dual verification mechanism. Even if one system deviates, the other system can still provide reliable test results, thereby ensuring that the testing process is not interrupted. Attached Figure Description

[0044] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0045] Figure 2 This is a three-dimensional sectional view of the test bench of the present invention;

[0046] Figure 3 This is a three-dimensional structural diagram illustrating the sliding relationship between the test bench and the sliding frame of the present invention.

[0047] Figure 4 This is a three-dimensional structural diagram of the gear shaft and rack frame of the present invention;

[0048] Figure 5 This is a three-dimensional structural diagram of the sliding relationship of the U-shaped frame sliding bracket of the present invention;

[0049] Figure 6 This is a three-dimensional structural cross-sectional view of the U-shaped frame of the present invention;

[0050] Figure 7 This is a three-dimensional structural cross-sectional view of the sliding frame of the present invention;

[0051] Figure 8 This is a three-dimensional structural cross-sectional view of the first limiting pin of the present invention;

[0052] Figure 9 This is a three-dimensional structural cross-sectional view of the extruded part of the present invention.

[0053] The above-mentioned figures include the following reference numerals: 10, test bench; 11, test object; 12, driving component; 13, U-shaped frame; 14, sliding frame; 15, fixed seat; 16, extrusion component; 17, pressure sensing element; 20, first limiting pin; 30, Z-shaped rod; 31, second limiting pin; 32, first sliding block; 33, second sliding block; 34, knob; 35, gear shaft; 36, rack frame; 40, swinging component; 41, elastic component; 42, connecting frame; 43, stop block; 50, U-shaped frame; 51, fixed frame; 52, connecting rope; 60, fixed column; 61, elastic telescopic rod; 62, extrusion frame; 63, extrusion seat. Detailed Implementation

[0054] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0055] To address the issue that existing electro-hydraulic push rods in the puncture section fail due to electrical faults after prolonged use, causing the telescopic portion of the push rod to remain stationary during puncture, resulting in puncture values ​​that no longer meet testing standards and fail to accurately reflect the tire's true puncture resistance, and potentially damaging the wheel rim, increasing safety hazards and testing costs, this invention employs a method of separately fixing the existing electro-hydraulic push rod and the sharp object within the puncture section. This allows the existing electro-hydraulic push rod to disconnect the connection between the telescopic portion and the sharp object in the event of an accident, protecting the tire and wheel rim while preventing the sharp object from continuing to move along with the telescopic portion of the electro-hydraulic push rod, thus avoiding distortion of the puncture values.

[0056] Example 1: A testing device for automobile tire production, please refer to... Figures 1-8 The device includes: a test bench 10; a drive unit 12 disposed within the test bench 10; a U-shaped frame 13 fixedly connected to the telescopic end of the drive unit 12, the test bench 10 and the U-shaped frame 13 being slidably connected to a sliding frame 14, with a gap between the sliding frame 14 and the drive end of the drive unit 12; a fixed seat 15 fixedly connected to the sliding frame 14, the fixed seat 15 being slidably connected to an extrusion member 16; a pressure sensing element 17 disposed within the fixed seat 15 and in contact with the extrusion member 16; a limiting assembly disposed on the U-shaped frame 13 for connecting the sliding frame 14 and the U-shaped frame 13; and an unlocking assembly disposed within the sliding frame 14 for unlocking the sliding frame 14 and the U-shaped frame 13.

[0057] In the above scheme, the test object 11 consists of a tire and a hub. The test bench 10 is equipped with a control terminal (not shown in the figure). The drive component 12 is an electro-hydraulic push rod. The drive component 12 is electrically connected to the control terminal on the test bench 10. The pressure sensing element 17 is an existing pressure sensor. Through the contact between the extrusion component 16 and the tire on the test object 11, the pressure sensing element 17 provides real-time feedback of the extrusion force between the extrusion component 16 and the tire on the test object 11, thereby realizing the puncture test on the tire on the test object 11. When the tire on the test object 11 is punctured, the pressure of the pressure sensing element 17 is lost, and the test result of the tire on the test object 11 is obtained at this time.

[0058] Please refer to Figure 4 and Figure 7 The limiting component includes: a first limiting pin 20, which is slidably connected to the sliding frame 14. The first limiting pin 20 is used to limit the U-shaped frame 13. A first tension spring is fixed between the first limiting pin 20 and the sliding frame 14.

[0059] In the above scheme, when the first limiting pin 20 is inserted into the U-shaped frame 13, the first tension spring of the first limiting pin 20 is in a stretched state.

[0060] Please refer to Figure 3 , Figure 4 and Figure 8 The unlocking components include: a Z-shaped rod 30, slidably connected to the sliding frame 14; a second limiting pin 31, slidably connected to the sliding frame 14, the second limiting pin 31 being used to limit the first limiting pin 20, the Z-shaped rod 30 having a groove on the side near the first limiting pin 20, the second limiting pin 31 sliding along the groove on the Z-shaped rod 30; a first sliding block 32, fixedly connected to the Z-shaped rod 30 and slidably connected to the sliding frame 14, a second tension spring fixedly connected between the first sliding block 32 and the sliding frame 14; and a second sliding block 33, slidably connected to the test bench 10, the second sliding block 33 being used to press the first sliding block 32.

[0061] In the above scheme, when the second limiting pin 31 is located on the left side of the inclined groove of the Z-shaped rod 30, the second limiting pin 31 limits the first limiting pin 20. Conversely, when the second limiting pin 31 is located on the right side of the inclined groove of the Z-shaped rod 30, the second limiting pin 31 no longer limits the first limiting pin 20. The opposing sides of the first sliding block 32 and the second sliding block 33 are provided with inclined surfaces. The inclined surfaces here are used to facilitate the second sliding block 33 to squeeze the first sliding block 32 (the inclined surface of the first sliding block 32 faces the lower right, and the inclined surface of the second sliding block 33 faces the upper left).

[0062] Please refer to Figure 3The unlocking component also includes: an adjustment component, which is set inside the test bench 10 and is used to adjust the position of the second sliding block 33. The adjustment component includes: a knob 34, which is slidably connected to the test bench 10 and has friction with it. The knob 34 is splinedly connected to a gear shaft 35 that passes through the test bench 10 and is rotatably connected to it. The gear shaft 35 is rotatably connected to the test bench 10. A rack frame 36 is slidably connected inside the test bench 10. The rack frame 36 is fixedly connected to the second sliding block 33 and meshes with the gear shaft 35.

[0063] In the above scheme, a sealing ring is fixed to the rear side of the knob 34. When the sealing ring on the rear side of the knob 34 comes into contact with the test bench 10, there is friction between the two. The distance between the second sliding block 33 and the first sliding block 32 is adjusted by the rack frame 36, thereby changing the height at which the first sliding block 32 is triggered.

[0064] Please refer to Figure 6 and Figure 8 The U-shaped frame 13 is rotatably connected to a swing member 40 that contacts the sliding frame 14. The axis of the pressing member 16 coincides with the axis of the telescopic part of the driving member 12. The center line of the swing member 40 coincides with the axes of the pressing member 16 and the telescopic part of the driving member 12, which is used to maintain the stability of the applied force position. An elastic member 41 is fixedly connected between the swing member 40 and the sliding frame 14. The sliding frame 14 is slidably connected to a connecting frame 42 that is fixedly connected to the first limiting pin 20. Both the connecting frame 42 and the U-shaped frame 13 are fixedly connected to a stop block 43 for limiting the swing member 40. The lower side of the swing member 40 and the lower side stop block 43 are provided with mutually fitting arc surfaces.

[0065] In the above scheme, the swing member 40 transmits the compressive force on the sliding frame 14 to the U-shaped frame 13, the elastic member 41 is an arc spring, the volume of the left stop 43 is larger than the volume of the right stop 43, the left stop 43 is used to limit the swing direction of the swing member 40, and the right stop 43 is used to provide temporary shielding for the swing member 40, thereby enhancing the stability of the swing member 40.

[0066] Working principle: When the test object 11 needs to be tested, the operator pulls the knob 34 forward, causing the knob 34 to slide forward along the gear shaft 35. This eliminates the friction between the knob 34 and the test bench 10. The operator then rotates the knob 34, which drives the gear shaft 35 to rotate. This causes the rack frame 36 to move the second sliding block 33, adjusting its position and thus changing the trigger height of the second sliding block 33 relative to the first sliding block 32. After the switch is completed, the operator presses the knob 34 backward. The friction between the test bench 10 and the knob 34 limits the movement of the knob 34.

[0067] When a puncture test is required on the test specimen 11, the staff fixes the test specimen 11 on the test bench 10. Then, the staff controls the telescopic part of the drive component 12 to move downward through the control terminal on the test bench 10. The telescopic part of the drive component 12 drives the extrusion component 16 and the pressure sensing element 17 to move downward through the U-shaped frame 13, the sliding frame 14, the swing component 40, the first limit pin 20 and the fixed seat 15. During this process, the sliding frame 14 slides downward along the test bench 10.

[0068] When the extruder 16 moves to contact the test object 11, the extruder 16 presses the pressure sensing element 17, and the pressure sensing element 17 transmits an electrical signal to the control terminal on the test bench 10. During this process, the telescopic part of the drive member 12 applies extrusion force to the U-shaped frame 13. The U-shaped frame 13 transmits the extrusion force to the fixed seat 15 and the extruder 16 through the swing member 40, the first limit pin 20 and the sliding frame 14. The swing member 40 shares the extrusion force of the U-shaped frame 13 on the first limit pin 20. Under the action of the center line of the swing member 40 coinciding with the axis of the extruder 16, the extruder 16 remains stable during the movement. Through the above steps, the extrusion force is transmitted while the first limit pin 20 is protected.

[0069] When the tire inside the test object 11 is punctured, the extruder 16 loses its pressure on the pressure sensing element 17. At this time, the pressure sensing element 17 transmits an electrical signal to the control terminal on the test bench 10, thereby obtaining the puncture resistance of the tire on the test object 11.

[0070] After the puncture test on the test specimen 11 is completed, the control terminal on the test bench 10 manipulates the telescopic part of the drive component 12 to move upward and reset, causing the telescopic part of the drive component 12 to move the aforementioned parts upward and reset to their original position. Figure 5 The state in the middle is sufficient.

[0071] When the telescopic part of the drive component 12 moves continuously downward due to an electrical fault or because an operator accidentally touches the button that controls the extension of the telescopic part of the drive component 12, in order to prevent excessive movement of the telescopic part of the drive component 12, which could cause the puncture value to no longer meet the test standard or cause accidental damage to the wheel hub inside the test object 11 due to excessive movement of the extrusion component 16, the following measures are taken:

[0072] When the telescopic part of the drive component 12 drives the U-shaped frame 13 and its auxiliary parts to continue moving downward until the inclined surface of the first sliding block 32 contacts the inclined surface of the second sliding block 33 (at this time, the tire puncture test has been completed), the inclined surface of the second sliding block 33 presses against the inclined surface of the first sliding block 32, causing the first sliding block 32 to drive the Z-shaped rod 30 to move to the left and stretch the second tension spring of the first sliding block 32. During the process of the Z-shaped rod 30 moving to the left, it presses against the second limiting pin 31 through the inclined groove on it, causing the second limiting pin 31 to move downward and gradually release the limitation on the first limiting pin 20.

[0073] When the second limiting pin 31 moves to contact the right side of the inclined groove on the Z-shaped rod 30, the second limiting pin 31 completely releases its restriction on the first limiting pin 20. Under the action of the first tension spring on it, the first limiting pin 20 drives the connecting frame 42 and the right-side stop block 43 to move quickly to the right, so that the first limiting pin 20 quickly disengages from the restriction on the sliding frame 14, thereby disconnecting the connection between the sliding frame 14 and the U-shaped frame 13. At this time, when the telescopic part of the driving member 12 continues to drive the U-shaped frame 13 to move, the squeezing force of the extrusion member 16 on the tire of the test object 11 will disappear, realizing the stable acquisition of test data of the test object 11 and the protection of the wheel hub of the test object 11.

[0074] As the first limit pin 20 drives the connecting frame 42 and all the stops 43 to move rapidly to the right, the stops 43 no longer limit the swinging part 40.

[0075] When the sliding frame 14 is disconnected from the U-shaped frame 13, the sliding frame 14 slides upward along the U-shaped frame 13 and squeezes the swing member 40, causing the swing member 40 to swing to the right and squeeze the elastic member 41 (the elastic member 41 contracts). During the swing to the right, the swing member 40 no longer applies a squeezing force to the sliding frame 14. Instead, the squeezing of the elastic member 41 by the swing member 40 indirectly buffers the sliding frame 14, preventing the sliding frame 14 from being bounced back by the tire inside the test object 11 and thus moving upward rapidly, causing the sliding frame 14 to have a hard collision with the U-shaped frame 13.

[0076] When the telescopic part of the drive component 12 moves to its limit position, the pressing part 16 will not contact the hub on the test object 11. At this time, the operator replaces the drive component 12 that has an electrical fault (if the drive component 12 is not damaged, it is reset normally, and the reset process is repeated as described above). After the replacement of the drive component 12 is completed, the telescopic part of the drive component 12 drives the sliding frame 14 and its auxiliary parts to move upward through the U-shaped frame 13. Figure 4 In the state described above, as the sliding frame 14 moves upward, it causes the first sliding block 32 to disengage from the second sliding block 33, and the sliding frame 14 to no longer contact the test object 11. At this time, the elastic element 41 drives the swing element 40 to reset, and the swing element 40 presses the sliding frame 14, causing the sliding frame 14 to move to the desired position. Figure 5 In the state of the swinging part 40, it is in contact with the left stop 43, but not with the right stop 43. Then, the staff pushes the first limit pin 20, the connecting frame 42 and the stop 43 to the left. During the movement of the first limit pin 20, the first tension spring is stretched.

[0077] After the first limit pin 20 moves to be fully inserted into the U-shaped frame 13 (see reference for details) Figure 5 The Z-shaped rod 30 and the first sliding block 32 move to the right under the action of the second tension spring, causing the inclined groove on the left side of the Z-shaped rod 30 to drive the second limiting pin 31 to move upward, and causing the second limiting pin 31 to re-insert into the first limiting pin 20, so as to limit the first limiting pin 20. After the above connection is completed, the staff releases the first limiting pin 20, the connecting frame 42 and the stop block 43.

[0078] Existing pressure sensors can test tire puncture resistance while moving with sharp objects. However, with the increase in tire testing volume, pressure sensors will face more frequent use, which will accelerate their wear. After long-term use, the sensitivity and accuracy of pressure sensors may decrease, resulting in inaccurate test results and affecting the reliability and effectiveness of the test. To solve the above problems, this invention adopts a combination of physical testing and electrical testing (pressure sensor). Physical testing is introduced as a backup, enhancing the redundancy of the system. Even if the pressure sensor fails, physical testing can still continue, ensuring that the testing process is not interrupted. By comparing the results of the two tests, potential problems can be identified and diagnosed in time, and maintenance measures can be taken in advance to avoid major failures.

[0079] Example 2: Based on Example 1, please refer to... Figure 5 It also includes: a detection component, set on the test bench 10, used to detect the distance the extruder 16 moves, the detection component includes: a U-shaped frame 50, which is slidably connected to the test bench 10 and has friction with it; a fixed frame 51, which is splinedly connected to the extruder 16; symmetrically distributed connecting ropes 52, which are all slidably connected to the sliding frame 14 and fixedly connected to the fixed frame 51, and the ends of the symmetrically distributed connecting ropes 52 away from the fixed frame 51 are all fixedly connected to the U-shaped frame 50; and a connecting component, set inside the extruder 16, used to connect the extruder 16 and the fixed frame 51.

[0080] In the above scheme, the U-shaped frame 50 can be set with scales so that people can watch the movement distance of the U-shaped frame 50. The connecting rope 52 can be made of aramid fiber, carbon fiber, composite material rope, etc.

[0081] Please refer to Figure 8 and Figure 9The connecting components include: a fixed post 60, which is fixedly connected to the extruder 16, and the fixed post 60 is fixedly connected to an elastic telescopic rod 61 arranged in a ring array; an extrusion frame 62 arranged in a ring array, which is the same number as the elastic telescopic rod 61, and is slidably connected to the extruder 16 and fixedly connected to the telescopic end of the adjacent elastic telescopic rod 61, the extrusion frame 62 is used to extrude the fixed frame 51; and an extrusion seat 63, which is slidably connected to the extruder 16 and is used to extrude the extrusion frame 62 arranged in a ring array, the extrusion seat 63 is fixedly connected to the fixed post 60 with a spring.

[0082] In the above scheme, the elastic telescopic rods 61 are symmetrically and arranged in a circular array. Each extrusion frame 62 corresponds to two elastic telescopic rods 61. The opposing sides of all extrusion frames 62 are made of rigid material, and the opposing sides of all extrusion frames 62 are made of soft silicone material. All extrusion frames 62 and extrusion seats 63 have inclined surfaces on their opposing sides (the edge line of the inclined surface of the extrusion frame 62 is parallel to the edge line of the inclined surface of the extrusion seat 63) so that the extrusion seat 63 can continuously extrude pressure on all extrusion frames 62. The sharpness of the extrusion seat 63 shown in the figure is for illustrative purposes only. The actual sharpness is adjusted according to the actual situation.

[0083] Working principle: During the test of the tire in the test object 11, the telescopic part of the drive component 12 drives the extrusion component 16 and the pressure sensing element 17 to move downward through the U-shaped frame 13, the sliding frame 14, the swing component 40, the first limit pin 20 and the fixed seat 15. During the movement of the extrusion component 16, the extrusion seat 63 and its auxiliary parts move downward synchronously. During this process, the extrusion component 16 and the fixed frame 51 are relatively displaced.

[0084] When the extruder 16 moves the extrusion seat 63 to contact the tire on the test object 11, the extruder 16 continues to move downward, so that the extrusion seat 63 abuts against the tire on the test object 11 and moves into the extruder 16. During the movement of the extrusion seat 63, all the extrusion frames 62 are extruded (the springs on them are extruded during the movement of the extrusion seat 63), so that all the extrusion frames 62 move in opposite directions and stretch the telescopic part of the adjacent elastic telescopic rod 61. During the movement, all the extrusion frames 62 gradually come into contact with the fixed frame 51.

[0085] When the middle part of the extrusion seat 63 is in contact with the lower side of the extrusion piece 16, the outer sides of all the extrusion frames 62 are in contact with the fixed frame 51. At this time, the fixed frame 51 is limited so that the fixed frame 51 and the extrusion piece 16 form a "whole". At this time, the extrusion piece 16 continues to move downward under the action of the driving member 12. During the movement of the extrusion piece 16, the U-shaped frame 50 is pulled by the fixed frame 51 and the two connecting ropes 52, so that the U-shaped frame 50 slides downward along the test bench 10 (and there is friction between the two during this process).

[0086] After the puncture test on the test specimen 11 is completed, the extrusion seat 63 has punctured the tire on the test specimen 11. Under the action of the adjacent spring, the extrusion seat 63 slides down along the extrusion member 16. During the sliding process, the extrusion seat 63 no longer extrudes all the extrusion frames 62. The extrusion frames 62 are reset under the action of the adjacent elastic telescopic rod 61 and no longer extrude the fixed frame 51. Thus, the connection between the fixed frame 51 and the extrusion member 16 is disconnected. At this time, the U-shaped frame 50 will not continue to move down (the reset of the U-shaped frame 50 is done manually). Then, by observing the distance that the U-shaped frame 50 moves down, the depth of the puncture inside the test specimen 11 can be determined.

[0087] When the drive unit 12 experiences an electrical fault and the sliding frame 14 is disconnected from the U-shaped frame 13, the tire inside the test object 11 rebounds, causing the sliding frame 14 to move upward through the squeezing member 16. During the upward movement of the sliding frame 14, the two connecting ropes 52 deform, but this does not affect the position of the U-shaped frame 50. This process ensures that even when the squeezing member 16 is unable to properly test the tire inside the test object 11 due to an electrical fault, the physical measurement method described above can still record the test values ​​of the test object 11.

[0088] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A testing device for automobile tire production, characterized in that, include: Test bench (10); A driving component (12) is disposed within the test bench (10); The U-shaped frame (13) is fixed to the telescopic end of the drive component (12), and the test bench (10) and the U-shaped frame (13) are slidably connected to the sliding frame (14). A fixed base (15) is fixedly connected to the sliding frame (14). There is a gap between the sliding frame (14) and the driving end of the driving member (12). The fixed base (15) is slidably connected to the pressing member (16). A pressure sensing element (17) is disposed in the fixed base (15) and in contact with the extruder (16); A limiting component is provided on the U-shaped frame (13) for connecting the sliding frame (14) and the U-shaped frame (13). An unlocking component is provided inside the sliding frame (14) for unlocking the sliding frame (14) and the U-shaped frame (13); The limiting component includes: The first limiting pin (20) is slidably connected to the sliding frame (14). The first limiting pin (20) is used to limit the U-shaped frame (13). A first tension spring is fixed between the first limiting pin (20) and the sliding frame (14). The unlocking component includes: Z-shaped rod (30) is slidably connected to the sliding frame (14); The second limiting pin (31) is slidably connected to the sliding frame (14). The second limiting pin (31) is used to limit the first limiting pin (20). The Z-shaped rod (30) has a groove on the side near the first limiting pin (20). The second limiting pin (31) slides along the groove on the Z-shaped rod (30). The first sliding block (32) is fixedly connected to the Z-shaped rod (30) and slidably connected to the sliding frame (14). A second tension spring is fixedly connected between the first sliding block (32) and the sliding frame (14). The second sliding block (33) is slidably connected inside the test bench (10), and the second sliding block (33) is used to squeeze the first sliding block (32).

2. The testing device for automobile tire production according to claim 1, characterized in that, The unlocking component also includes: An adjustment component, disposed within the test bench (10), is used to adjust the position of the second sliding block (33). The adjustment component includes: A knob (34) is slidably connected to the test bench (10) and there is friction with it. The knob (34) is splinedly connected to a gear shaft (35), and the gear shaft (35) is rotatably connected to the test bench (10). The rack frame (36) is slidably connected to the test bench (10), and the rack frame (36) is fixedly connected to the second sliding block (33) and meshes with the gear shaft (35).

3. A testing device for automobile tire production according to claim 1, characterized in that, The U-shaped frame (13) is rotatably connected to a swing member (40) that contacts the sliding frame (14).

4. A testing device for automobile tire production according to claim 3, characterized in that, The axis of the extruder (16) coincides with the axis of the telescopic part of the drive member (12), and the center line of the swing member (40) coincides with the axes of both the extruder (16) and the telescopic part of the drive member (12).

5. A testing device for automobile tire production according to claim 4, characterized in that, An elastic element (41) is fixedly connected between the swinging element (40) and the sliding frame (14).

6. A testing apparatus for automobile tire production according to claim 5, characterized in that, The sliding frame (14) is slidably connected to a connecting frame (42) which is fixedly connected to the first limiting pin (20). Both the connecting frame (42) and the U-shaped frame (13) are fixedly connected to a stop (43) for limiting the swinging member (40).

7. A testing device for automobile tire production according to claim 4, characterized in that, Also includes: A detection component, disposed on the test bench (10), is used to detect the distance the extruder (16) moves. The detection component includes: The U-shaped frame (50) is slidably connected to the test bench (10) and is in friction with it; The fixed frame (51) is splined to the extruder (16); The symmetrically distributed connecting ropes (52) are all slidably connected to the sliding frame (14) and fixed to the fixed frame (51). The ends of the symmetrically distributed connecting ropes (52) away from the fixed frame (51) are all fixed to the U-shaped frame (50). A connecting component is disposed within the extruder (16) for connecting the extruder (16) and the fixing frame (51).

8. A testing apparatus for automobile tire production according to claim 7, characterized in that, The connection component includes: A fixed column (60) is fixedly connected to the extrusion member (16), and the fixed column (60) is fixedly connected to elastic telescopic rods (61) arranged in a ring array. The number of extrusion frames (62) arranged in a ring array is the same as that of the elastic telescopic rods (61), all of which are slidably connected to the extrusion member (16) and fixed to the telescopic ends of the adjacent elastic telescopic rods (61). The extrusion frames (62) are used to extrude the fixed frame (51). The extrusion seat (63) is slidably connected to the extrusion member (16) and is used to extrude the extrusion frame (62) distributed in a ring array. A spring is fixed between the extrusion seat (63) and the fixed column (60).

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