Testing device for automobile tire production

Abstract

The invention relates to the technical field of testing equipment for automobile tire production, in particular to a testing device for automobile tire production. A test bed; the driving part is arranged in the test bed; the U-shaped frame is fixedly connected to the telescopic end of the driving part, and the test bed and the U-shaped frame are jointly connected with a sliding frame in a sliding mode; and the fixed seat is fixedly connected to the sliding frame, the fixed seat is connected with an extrusion part in a sliding mode, and a gap exists between the extrusion part and the driving end of the driving part. The mode that an electric control hydraulic push rod in an existing puncture part is separated from a sharp object to be fixed is adopted, when an accident occurs, connection between a telescopic part of the electric control hydraulic push rod and the sharp object is automatically disconnected, even if the telescopic part of the electric control hydraulic push rod continues to stretch out, the sharp object cannot be driven to continue to move, and the safety is improved. Therefore, puncture numerical value distortion caused by continuous movement of a sharp object is avoided, the accuracy of a test result is ensured, the hub can be protected, and the hub is prevented from being damaged due to excessive extrusion.

Description

Technical Field

[0001] The invention relates to the technical field of testing equipment for automobile tire production, and in particular to a testing device for automobile tire production. Background Art

[0002] Car tires are key components to ensure vehicle safety and performance, so they undergo rigorous testing during production. The following are the main reasons why testing is required:

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

[0004] 2. Improve durability: Testing can help manufacturers evaluate the wear resistance and service life of tires to ensure that they maintain good performance in long-term use;

[0005] Safety and durability tests include: static load test, rolling resistance test, durability test, anti-skid performance test, puncture test, etc.

[0006] The existing equipment used in the puncture test is usually a puncture machine, which consists of a puncture part, a fixing part, a pressure sensor, a control terminal, etc. Its working principle is: the tire to be tested is installed on the fixing part, and then the puncture part pierces the sharp object into the tire surface at a set speed and force, and the value during the puncture process is recorded by the pressure sensor. When the tire surface is punctured, the pressure of the pressure sensor is lost instantly, and then the pressure sensor transmits the signal to the control terminal. However, in actual operation, the electric-controlled hydraulic push rod in the puncture part may have electrical failures due to long-term use, and during the experiment, if the experimenter accidentally touches the control button or other key components, the puncture rod moves abnormally, which may cause the following problems:

[0007] 1. Unable to stop moving. The telescopic part of the electric hydraulic push rod may not be able to stop in time during the puncture process, causing the puncture depth to exceed the preset value;

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

[0009] In order to solve the problems mentioned in the above background technology, the present invention provides a testing device for automobile tire production.

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

[0011] Test bench;

[0012] A driving member, arranged in the test bench;

[0013] A U-shaped frame is fixedly connected to the telescopic end of the driving member, the test bench and the U-shaped frame are slidably connected to a sliding frame, and there is a gap between the sliding frame and the driving end of the driving member;

[0014] A fixed seat, fixedly connected to the sliding frame, wherein the fixed seat is slidably connected with an extrusion member;

[0015] A pressure sensing element is disposed in the fixing seat and in contact with the extrusion member;

[0016] A limiting assembly, disposed on the U-shaped frame, and used to connect the sliding frame and the U-shaped frame;

[0017] An unlocking component is arranged in the sliding frame and is used for unlocking the sliding frame and the U-shaped frame.

[0018] Preferably, the limiting component comprises:

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

[0020] Preferably, the unlocking assembly comprises: a Z-shaped rod slidably connected in the sliding frame;

[0021] a second limiting pin, slidably connected to the sliding frame, the second limiting pin being used to limit the first limiting pin, an oblique groove being provided on one side of the Z-shaped rod close to the first limiting pin, and the second limiting pin sliding along the oblique groove on the Z-shaped rod;

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

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

[0024] Preferably, the unlocking component further comprises:

[0025] An adjusting component is arranged in the test bench and is used to adjust the position of the second sliding block. The adjusting component includes:

[0026] A knob is slidably connected to the test bench and has friction therewith, the knob is splined to a gear shaft, and the gear shaft is rotationally connected to the test bench;

[0027] A rack frame is slidably connected in 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 swinging member in contact with the sliding frame.

[0029] Preferably, the axis of the extrusion member coincides with the axis of the telescopic portion of the driving member, and the center line of the swing member coincides with the axes of both the extrusion member and the telescopic portion of the driving member.

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

[0031] Preferably, the sliding frame is slidably connected to a connecting frame fixed to the first limit pin, and the connecting frame and the U-shaped frame are both fixed with a stopper for limiting the swinging member, the swinging member is provided with a symmetrically distributed first arc surface, and the stopper is provided with a second arc surface that fits with the adjacent first arc surface on the swinging member.

[0032] Preferably, it also includes:

[0033] A detection component is arranged on the test bench and is used to detect the distance moved by the extrusion part. The detection component comprises:

[0034] A U-shaped frame, slidably connected to the test bench and having friction therewith;

[0035] a fixed frame splined to the extrusion;

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

[0037] The connecting component is arranged in the extrusion component and is used for connecting the extrusion component and the fixing frame.

[0038] Preferably, the connection assembly comprises:

[0039] A fixed column, fixedly connected in the extrusion piece, the fixed column being fixedly connected with elastic telescopic rods distributed in a circular array;

[0040] The extrusion racks are distributed in a circular array, the number of which is the same as that of the elastic telescopic rods, and are all slidably connected to the extrusion member and fixedly connected to the telescopic ends of the adjacent elastic telescopic rods, and the extrusion racks are used to extrude the fixed frame;

[0041] An extrusion seat is slidably connected to the extrusion piece and is used to extrude the extrusion racks distributed in a ring array. A spring is fixedly connected between the extrusion seat and the fixing column.

[0042] The present invention has the following advantages: In order to solve the problems that the electrical components of the electric-controlled hydraulic push rod in the existing puncture part have electrical faults due to long-term use, resulting in the puncture value no longer meeting the test standard and the data recorded by the pressure sensor losing reference value, an improvement scheme is proposed, which is as follows: The present invention adopts a method of separately fixing the electric-controlled hydraulic push rod in the existing puncture part and the sharp object, and automatically disconnects the connection between the telescopic part of the electric-controlled hydraulic push rod and the sharp object when an unexpected situation occurs. Even if the telescopic part of the electric-controlled hydraulic push rod continues to extend, it will not drive the sharp object to continue to move, thereby avoiding the distortion of the puncture value caused by the continued movement of the sharp object, ensuring the accuracy of the test results while also protecting the wheel hub and preventing the wheel hub from being damaged due to excessive extrusion;

[0043] When testing the puncture resistance of tires, existing pressure sensors will wear out faster as the test volume increases, resulting in decreased sensitivity and precision, affecting the accuracy and reliability of the test results. To solve the above problems, the present invention adopts a combination of physical testing and electrical testing to provide a dual verification mechanism. Even if one of the systems deviates, the other system can still provide reliable detection results, thereby ensuring that the test process will not be interrupted. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

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

[0046] Figure 3 It is a three-dimensional structural schematic diagram of the sliding relationship between the test bench and the sliding frame of the present invention;

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

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

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

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

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

[0052] Fig. 9 It is a three-dimensional structural cross-sectional view of the extrusion part of the present invention.

[0053] Among them, the above-mentioned drawings include the following figure marks: 10, test bench, 11, test object, 12, driving member, 13, U-shaped frame, 14, sliding frame, 15, fixed seat, 16, extrusion member, 17, pressure sensing element, 20, first limit pin, 30, Z-shaped rod, 31, second limit pin, 32, first sliding block, 33, second sliding block, 34, knob, 35, gear shaft, 36, rack frame, 40, swing member, 41, elastic member, 42, connecting frame, 43, stopper, 50, U-shaped frame, 51, fixed frame, 52, connecting rope, 60, fixed column, 61, elastic telescopic rod, 62, extrusion frame, 63, extrusion seat. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] In order to solve the problem that the electrical components of the existing electric hydraulic push rod in the puncture part fail due to electrical fault after long-term use, the telescopic part of the electric hydraulic push rod will not be able to stop moving during the puncture process, resulting in the puncture value no longer meeting the test standard, and failing to accurately reflect the true puncture resistance of the tire, and may also cause damage to the wheel hub, increasing safety hazards and testing costs. Therefore, the present invention adopts a method of separately fixing the electric hydraulic push rod and the sharp object in the existing puncture part, so that the connection between the telescopic part of the electric hydraulic push rod and the sharp object is disconnected after an unexpected situation occurs, thereby protecting the tire hub while preventing the sharp object from continuing to move with the telescopic part of the electric hydraulic push rod, resulting in distortion of the puncture value.

[0056] Example 1: A testing device for automobile tire production, please refer to Figure 1-Figure 8 , including: a test bench 10; a driving member 12, which is arranged in the test bench 10; a U-shaped frame 13, which is fixed to the telescopic end of the driving member 12, and the test bench 10 and the U-shaped frame 13 are slidably connected to a sliding frame 14, and there is a gap between the sliding frame 14 and the driving end of the driving member 12; a fixed seat 15, which is fixed to the sliding frame 14, and the fixed seat 15 is slidably connected to an extrusion member 16; a pressure sensing element 17, which is arranged in the fixed seat 15 and contacts with the extrusion member 16; a limiting component, which is arranged on the U-shaped frame 13 and is used to connect the sliding frame 14 and the U-shaped frame 13; an unlocking component, which is arranged in the sliding frame 14 and is used to unlock the sliding frame 14 and the U-shaped frame 13.

[0057] In the above scheme, the test object 11 is composed of a tire and a wheel hub, the test bench 10 is provided with a control terminal (not shown in the figure), the driving member 12 is an electrically controlled hydraulic push rod, the driving member 12 is electrically connected to the control terminal on the test bench 10, and the pressure sensing element 17 is an existing pressure sensor. Through the contact between the extrusion member 16 and the tire on the test object 11, the pressure sensing element 17 real-time feedback of the extrusion force between the extrusion member 16 and the tire on the test object 11 is achieved to realize the puncture test of 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 assembly includes: a first limiting pin 20 slidably connected to the sliding frame 14 , the first limiting pin 20 is used to limit the U-shaped frame 13 , and a first tension spring is fixedly connected between the first limiting pin 20 and the sliding frame 14 .

[0059] In the above solution, 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 assembly includes: a Z-shaped rod 30, which is slidably connected to the sliding frame 14; a second limit pin 31, which is slidably connected to the sliding frame 14, and the second limit pin 31 is used to limit the first limit pin 20. An oblique groove is provided on the side of the Z-shaped rod 30 close to the first limit pin 20, and the second limit pin 31 slides along the oblique groove on the Z-shaped rod 30; a first sliding block 32, which is fixed to the Z-shaped rod 30 and slidably connected to the sliding frame 14, and a second tension spring is fixed between the first sliding block 32 and the sliding frame 14; a second sliding block 33, which is slidably connected to the test bench 10, and the second sliding block 33 is used to squeeze the first sliding block 32.

[0061] In the above scheme, when the second limit pin 31 is located on the left side of the oblique groove of the Z-shaped rod 30, the second limit pin 31 limits the first limit pin 20. Conversely, when the second limit pin 31 is located on the right side of the oblique groove of the Z-shaped rod 30, the second limit pin 31 no longer limits the first limit pin 20. The first sliding block 32 and the second sliding block 33 are both provided with inclined surfaces on the opposite sides. The inclined surfaces here are used to facilitate the squeezing of the first sliding block 32 by the second sliding block 33 (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 adjusting component, which is arranged in the test bench 10 and is used to adjust the position of the second sliding block 33. The adjusting component includes: a knob 34, which is slidably connected to the test bench 10 and has friction with it. The knob 34 is splined with 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 rack 36, which is slidably connected in the test bench 10, and the rack rack 36 is fixed 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 contacts 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 to change 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 swinging member 40 in contact with the sliding frame 14, the axis of the extrusion member 16 coincides with the axis of the telescopic portion of the driving member 12, and the center line of the swinging member 40 coincides with the axes of the telescopic portions of the extrusion member 16 and the driving member 12, which are used to maintain the stability of the force application position. An elastic member 41 is fixedly connected between the swinging member 40 and the sliding frame 14, and the sliding frame 14 is slidably connected to a connecting frame 42 fixedly connected to the first limit pin 20, and the connecting frame 42 and the U-shaped frame 13 are both fixedly connected to a stopper 43 for limiting the swinging member 40, and the lower side of the swinging member 40 and the stopper 43 on the lower side are both provided with arc surfaces that fit each other.

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

[0066] Working principle: When the test object 11 needs to be tested, the staff pulls the knob 34 forward to make the knob 34 slide forward along the gear shaft 35, so that the knob 34 no longer has friction with the test bench 10. Then the staff rotates the knob 34, and the knob 34 drives the gear shaft 35 to rotate, so that the rack rack 36 drives the second sliding block 33 to move, adjusts the position of the second sliding block 33, and then changes the triggering height of the second sliding block 33 to the first sliding block 32. After the switching is completed, the staff presses the knob 34 backward to limit the knob 34 through the friction between the test bench 10 and the knob 34.

[0067] When a puncture test is required on the test object 11, the staff fixes the test object 11 on the test bench 10, and then controls the telescopic part of the driving member 12 to move downward through the control terminal on the test bench 10, so that the telescopic part of the driving member 12 drives the extrusion member 16 and the pressure sensing element 17 to move downward through the U-shaped frame 13, the sliding frame 14, the swinging member 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 extrusion member 16 moves to contact the test object 11, the extrusion member 16 squeezes the pressure sensing element 17, and the pressure sensing element 17 transmits the electrical signal to the control terminal on the test bench 10. During this process, the telescopic part of the driving member 12 applies an extrusion force to the U-shaped frame 13, and the U-shaped frame 13 transmits the extrusion force through the swing member 40, the first limit pin 20 and the sliding frame 14 to the fixed seat 15 and the extrusion member 16. The swing member 40 shares the extrusion force of the U-shaped frame 13 on the first limit pin 20. Under the effect of the coincidence of the center line of the swing member 40 and the axis of the extrusion member 16, the extrusion member 16 remains stable during the movement. Through the above steps, the extrusion force can be transmitted while the first limit pin 20 can be protected.

[0069] When the tire in the test object 11 is punctured, the extrusion member 16 loses the 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 of the test object 11 is completed, the control terminal on the test bench 10 controls the telescopic portion of the driving member 12 to move upward and reset, so that the telescopic portion of the driving member 12 drives the above-mentioned parts to move upward and reset to Figure 5 The status in .

[0071] When the telescopic portion of the driving member 12 continues to move downward due to an electrical fault or because the staff accidentally touches the button that controls the telescopic portion of the driving member 12 to extend, in order to prevent the excessive movement of the telescopic portion of the driving member 12, resulting in the puncture value no longer meeting the test standard or the excessive movement of the extrusion member 16 causing accidental damage to the wheel hub in the test object 11, the details are as follows:

[0072] When the telescopic part of the driving member 12 drives the U-shaped frame 13 and its accessory parts to continue to move 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 squeezes the inclined surface of the first sliding block 32, so that the first sliding block 32 drives the Z-shaped rod 30 to move to the left and stretches the second tension spring of the first sliding block 32. During the movement of the Z-shaped rod 30 to the left, the oblique groove thereon squeezes the second limit pin 31, so that the second limit pin 31 moves downward and gradually releases the limit on the first limit pin 20;

[0073] When the second limit pin 31 moves to contact the right side of the inclined groove on the Z-shaped rod 30, the second limit pin 31 completely releases the limit on the first limit pin 20. The first limit pin 20 drives the connecting frame 42 and the right block 43 to move rapidly to the right side under the action of the first tension spring thereon, so that the first limit pin 20 quickly disengages from the limit 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 on the test object 11 will disappear, thereby achieving stable collection of test data of the test object 11 and protection of the wheel hub on the test object 11.

[0074] When the first limiting pin 20 drives the connecting frame 42 and all the stoppers 43 to move rapidly to the right, the stoppers 43 no longer limit the swinging member 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 swinging member 40, so that the swinging member 40 actively swings to the right and squeezes the elastic member 41 (the elastic member 41 contracts). During the swinging to the right process, the swinging member 40 no longer applies an extrusion force to the sliding frame 14. On the contrary, the elastic member 41 is squeezed by the swinging member 40, thereby indirectly buffering the sliding frame 14, thereby preventing the sliding frame 14 from bouncing back due to the tire in the test object 11, thereby rapidly moving upward, causing a hard collision between the sliding frame 14 and the U-shaped frame 13.

[0076] When the telescopic part of the driving member 12 moves to the limit position, the extrusion member 16 will not contact the hub of the test object 11. At this time, the staff will replace the driving member 12 with electrical failure (if the driving member 12 is not damaged, it will be reset normally, and the reset process can be repeated as described above). After the replacement of the driving member 12 is completed, the telescopic part of the driving member 12 drives the sliding frame 14 and its attached parts to move upward to the U-shaped frame 13. Figure 4 In the state of the slide frame 14, the first slide block 32 is separated from the contact with the second slide block 33 during the upward movement, and the slide frame 14 is no longer in contact with the test object 11. At this time, the swing member 40 is reset by the elastic member 41, and the swing member 40 squeezes the slide frame 14, so that the slide frame 14 moves to Figure 5 In the state, the swing member 40 is in contact with the left stopper 43, but not with the right stopper 43. Then the staff pushes the first limit pin 20, the connecting frame 42 and the stopper 43 to the left, and the first tension spring is stretched during the movement of the first limit pin 20.

[0077] When the first limiting pin 20 is moved to be completely inserted into the U-shaped frame 13 (for details, please refer to 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 thereon, so that the inclined groove on the left side of the Z-shaped rod 30 drives the second limit pin 31 to move upward, and the second limit pin 31 is reinserted into the first limit pin 20 to achieve the limiting of the first limit pin 20. After the above connection is completed, the staff releases the first limit pin 20, the connecting frame 42 and the stop block 43.

[0078] Existing pressure sensors can test the puncture resistance of tires when accompanied by the movement of sharp objects. However, as the amount of tire testing increases, the pressure sensors will be used more frequently, which will accelerate their wear. After long-term use, the sensitivity and accuracy of the pressure sensors may decrease, resulting in inaccurate test results, affecting the reliability and effectiveness of the test. To solve the above problems, the present invention adopts a combination of physical testing and electrical testing (pressure sensor), introduces physical testing as a backup, and enhances the redundancy of the system. Even if the pressure sensor fails, the physical test can still continue to ensure that the test process will not be interrupted. By comparing the two test results, potential problems can be discovered and diagnosed in a timely manner, maintenance measures can be taken in advance, and major failures can be avoided.

[0079] Example 2: Based on Example 1, please refer to Figure 5 , also includes: a detection component, which is arranged on the test bench 10 and is used to detect the distance moved by the extrusion piece 16, and 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 splined to the extrusion piece 16; symmetrically distributed connecting ropes 52, which are all slidably connected to the sliding frame 14 and are all 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; a connecting component, which is arranged in the extrusion piece 16 and is used to connect the extrusion piece 16 and the fixed frame 51.

[0080] In the above solution, a scale can be set on the U-shaped frame 50 to facilitate people to observe the moving distance of the U-shaped frame 50, and the connecting rope 52 can be made of aramid fiber material, carbon fiber material, composite material rope, etc.

[0081] Please refer to Figure 8 and Fig. 9The connecting component includes: a fixed column 60, which is fixedly connected to the extrusion piece 16, and the fixed column 60 is fixedly connected with elastic telescopic rods 61 distributed in a circular array; the extrusion frames 62 distributed in the circular array are the same in number as the elastic telescopic rods 61, and are all slidably connected to the extrusion piece 16, and are fixedly connected to the telescopic ends of adjacent elastic telescopic rods 61, and the extrusion frames 62 are used to extrude the fixed frame 51; an extrusion seat 63, which is slidably connected to the extrusion piece 16, and is used to extrude the extrusion frames 62 distributed in a circular array, and a spring is fixedly connected between the extrusion seat 63 and the fixed column 60.

[0082] In the above scheme, in the present invention, the elastic telescopic rods 61 are symmetrical and distributed in a circular array, one extrusion frame 62 corresponds to two elastic telescopic rods 61, the facing sides of all extrusion frames 62 are made of hard material, and the back sides of all extrusion frames 62 are made of soft silicone material. All extrusion frames 62 and the facing sides of the extrusion seats 63 are provided with inclined surfaces (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) to facilitate the continuous extrusion of all extrusion frames 62 by the extrusion seat 63. The sharpness of the extrusion seat 63 in the figure is only for illustration, and 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 portion of the driving member 12 drives the extrusion member 16 and the pressure sensing element 17 to move downward through the U-shaped frame 13, the sliding frame 14, the swinging member 40, the first limit pin 20 and the fixed seat 15. During the movement of the extrusion member 16, the extrusion seat 63 and its attached parts are driven to move downward synchronously. During this process, relative displacement occurs between the extrusion member 16 and the fixed frame 51.

[0084] When the extrusion piece 16 drives the extrusion seat 63 to move until the extrusion seat 63 contacts the tire on the test object 11, the extrusion piece 16 continues to move downward, so that the extrusion seat 63 presses against the tire on the test object 11 and moves into the extrusion piece 16. During the movement of the extrusion seat 63, all the extrusion frames 62 are squeezed (the springs on the extrusion seat 63 are squeezed during the movement), so that all the extrusion frames 62 move backwards and stretch the telescopic parts of the adjacent elastic telescopic rods 61. All the extrusion frames 62 gradually fit with the fixed frame 51 during the movement.

[0085] When the middle of the extrusion seat 63 is in contact with the lower side of the extrusion member 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 member 16 form a "whole". At this time, the extrusion member 16 continues to move downward under the thrust provided by the driving member 12. During the movement of the extrusion member 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 object 11 is completed, the extrusion seat 63 has punctured the tire on the test object 11. Under the action of the adjacent spring of the extrusion seat 63, the extrusion seat 63 slides downward along the extrusion piece 16. During the sliding process of the extrusion seat 63, all the extrusion frames 62 are no longer squeezed. The extrusion frame 62 is reset under the action of the adjacent elastic telescopic rod 61 and no longer squeezes the fixed frame 51, thereby disconnecting the fixed frame 51 from the extrusion piece 16. At this time, the U-shaped frame 50 will not continue to move downward (the reset of the U-shaped frame 50 depends on manual work), and then the staff can observe the distance that the U-shaped frame 50 moves downward to know the depth of the tire punctured in the test object 11.

[0087] When an electrical failure occurs in the driving member 12 and the sliding frame 14 is disconnected from the U-shaped frame 13, when the tire in the test object 11 rebounds, the sliding frame 14 is driven to move upward by the extrusion member 16. During the upward movement of the sliding frame 14, the two connecting ropes 52 are deformed, but the position of the U-shaped frame 50 is not affected. This process ensures that when the extrusion member 16 cannot normally test the tire in the test object 11 due to an electrical failure, the physical measurement method used above can still record the test value of the test object 11.

[0088] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A testing device for automobile tire production, characterized in that: include: Test bench (10); A driving member (12) is arranged in the test bench (10); A U-shaped frame (13) is fixedly connected to the telescopic end of the driving member (12); the test bench (10) and the U-shaped frame (13) are slidably connected to a sliding frame (14); A fixed seat (15) is fixedly connected to the sliding frame (14), a gap exists between the sliding frame (14) and the driving end of the driving member (12), and the fixed seat (15) is slidably connected to an extrusion member (16); A pressure sensing element (17) is disposed in the fixing seat (15) and is in contact with the extrusion member (16); A limiting assembly, arranged on the U-shaped frame (13) and used for connecting the sliding frame (14) and the U-shaped frame (13); An unlocking component is arranged in the sliding frame (14) and is used to unlock the sliding frame (14) and the U-shaped frame (13).

2. A testing device for automobile tire production according to claim 1, characterized in that: The limiting component comprises: A first limiting pin (20) is slidably connected in the sliding frame (14); the first limiting pin (20) is used to limit the U-shaped frame (13); and a first tension spring is fixedly connected between the first limiting pin (20) and the sliding frame (14).

3. A testing device for automobile tire production according to claim 1, characterized in that: The unlocking component comprises: A Z-shaped rod (30) slidably connected to the sliding frame (14); A 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), an oblique groove is provided on a side of the Z-shaped rod (30) close to the first limiting pin (20), and the second limiting pin (31) slides along the oblique groove on the Z-shaped rod (30); A first sliding block (32) is fixedly connected to the Z-shaped rod (30) and is 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); A second sliding block (33) is slidably connected inside the test bench (10), and the second sliding block (33) is used to press the first sliding block (32).

4. A testing device for automobile tire production according to claim 3, characterized in that: The unlocking component also includes: An adjustment component is arranged in the test bench (10) and is used to adjust the position of the second sliding block (33), and the adjustment component comprises: A knob (34) is slidably connected to the test bench (10) and has friction therewith, the knob (34) is spline-connected to a gear shaft (35), and the gear shaft (35) is rotationally connected to the test bench (10); A rack frame (36) is slidably connected in the test bench (10); the rack frame (36) is fixedly connected to the second sliding block (33) and meshes with the gear shaft (35).

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

6. A testing device for automobile tire production according to claim 5, characterized in that: The axis of the extrusion member (16) coincides with the axis of the telescopic portion of the drive member (12), and the center line of the swing member (40) coincides with the axes of both the extrusion member (16) and the telescopic portion of the drive member (12).

7. A testing device for automobile tire production according to claim 6, characterized in that: An elastic member (41) is fixedly connected between the swing member (40) and the sliding frame (14).

8. A testing device for automobile tire production according to claim 7, characterized in that: The sliding frame (14) is slidably connected to a connecting frame (42) fixedly connected to the first limiting pin (20), and both the connecting frame (42) and the U-shaped frame (13) are fixedly connected to a stopper (43) for limiting the swinging member (40).

9. A testing device for automobile tire production according to claim 6, characterized in that: Also includes: A detection component is arranged on the test bench (10) and is used to detect the distance moved by the extrusion member (16), the detection component comprising: A U-shaped frame (50) is slidably connected to the test bench (10) and has friction therewith; A fixing frame (51) spline-connected to the extrusion member (16); The symmetrically distributed connecting ropes (52) are all slidably connected to the sliding frame (14) and are all fixedly connected to the fixing frame (51); the ends of the symmetrically distributed connecting ropes (52) away from the fixing frame (51) are all fixedly connected to the U-shaped frame (50); A connecting component is arranged in the extrusion member (16) and is used to connect the extrusion member (16) and the fixing frame (51).

10. A testing device for automobile tire production according to claim 9, characterized in that: The connection component comprises: A fixed column (60) is fixedly connected in the extrusion member (16), and the fixed column (60) is fixedly connected with elastic telescopic rods (61) distributed in a circular array; The extrusion racks (62) are distributed in a circular array, the number of which is the same as the elastic telescopic rods (61), and are all slidably connected to the extrusion member (16) and fixedly connected to the telescopic ends of the adjacent elastic telescopic rods (61). The extrusion frame (62) is used for extruding the fixing frame (51); The extrusion seat (63) is slidably connected to the extrusion member (16) and is used to extrude the extrusion frames (62) distributed in a ring array. A spring is fixedly connected between the extrusion seat (63) and the fixing column (60).

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