Air tightness detection device for vacuum tire production

Abstract

The utility model belongs to the technical field of tire detection equipment, and particularly discloses an air tightness detection device for vacuum tire production. A transverse support of the device is fixed to a vertical beam of a gantry support, a supporting disc is arranged on the upper portion of the transverse support, an air supply hole communicated with the top and an air conveying pipe is formed in the bottom or the side of the supporting disc, and a clamping disc is arranged above the supporting disc in an up-down moving mode. The clamping driving device is obliquely hinged to a vertical beam of the gantry support, the middle of a hinge rod is hinged to a transverse support above the supporting disc or a cross beam of the gantry support, the guide sleeve is fixed to the upper portion of the supporting disc, and a connecting rod penetrating through the guide sleeve in a sliding mode is vertically fixed to the top end of the clamping disc. The other end of the hinge rod is hinged to a driving rod of the clamping driving device. According to the utility model, the clamping driving device is obliquely arranged, and the hinge rod and the connecting rod drive the clamping disc to move up and down to realize vacuum tire clamping so as to carry out air tightness detection, and the air tightness detection device has the characteristics of simple structure, reliable clamping, safety, convenience and high detection efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of tire testing equipment, specifically to an airtightness testing device for vacuum tire production that is simple in structure, reliable in clamping, safe and convenient, and has high testing efficiency. Background Technology

[0002] Tubeless tires are widely used in both motor vehicles and non-motorized vehicles due to their significant advantages. Tire quality is crucial for ensuring the safety of both vehicles, and airtightness is a key factor in guaranteeing the safety and performance of tubeless tires. Since the airtightness of tubeless tires is related to their structure, formula, and manufacturing process, and new tubeless tires require testing for strength and airtightness after molding and vulcanization due to variations in raw material batches and manufacturing processes, this testing is necessary to rate the material strength and detect the presence of cracks, pores, or nail holes. This allows for adjustments to the formula components, their proportions, and process parameters based on the test results, ultimately ensuring better safety performance of the finished tire and improving the production yield.

[0003] Traditional methods for testing tire air tightness involve placing the tire in a basin or trough filled with water, then manually or mechanically rotating it. The location of air bubbles is observed visually or via camera to locate and mark leaks. Alternatively, pressure gauges can be used for direct testing, or pressure and temperature sensors or microphones can be used to process signals through circuitry for indirect testing. These methods are not only laborious, complex, and cumbersome to use, but they also typically only allow testing one tire at a time, resulting in low testing efficiency.

[0004] In order to address the shortcomings of the aforementioned tire air tightness testing technology, the applicant submitted patent CN112414622A, which uses a support plate and a clamping plate installed vertically opposite each other. A clamping drive device drives the clamping plate to move up and down to cooperate with the support plate, so that the inner cavity of the tire under test can automatically form a closed space under the clamping of the clamping plate and the support plate. Then, compressed air is filled through the air supply pipe at the bottom of the support plate to test the air tightness and strength of the tire. This avoids the problem of high workload and low testing efficiency caused by the need for manual sealing of the inner side when testing vacuum tires. However, since the clamping drive device is installed vertically, when multiple airtightness testing devices are arranged in an array testing system, the vertically installed clamping drive device occupies the longitudinal height, which reduces the number of layers that can be arranged for airtightness testing devices. This reduces the number of vacuum tires that the array testing system can detect at the same time, thus affecting the testing efficiency. Moreover, since the vertically installed clamping drive device drives the clamping plate to move up and down and cooperate with the support plate, in order to avoid clamping instability, locking keys and locking buttons need to be set on the support plate and the clamping plate respectively. Although the problem of clamping instability is solved, it also makes the overall structure more complex and the testing process more cumbersome. The cumbersome testing process further reduces the testing efficiency. Utility Model Content

[0005] The purpose of this invention is to provide an airtightness testing device for vacuum tire production that is simple in structure, reliable in clamping, safe and convenient, and has high testing efficiency.

[0006] This utility model is implemented as follows: it includes a gantry support, a horizontal support, a support plate, a clamping plate, and a clamping drive device. The two ends of the horizontal support are fixedly connected to the two vertical beams on both sides of the gantry support. The support plate is set upward on the upper part of the horizontal support. The bottom or side of the support plate is provided with an air supply hole that connects to the top. The air supply hole is connected to the air supply pipe of the high-pressure air supply system. The clamping plate is movably set above the support plate.

[0007] It also includes a guide sleeve, a hinge rod, and a connecting rod. The clamping drive device is inclinedly hinged to the vertical beam of the gantry bracket above the support plate. The middle part of the hinge rod is hinged to the horizontal support or the crossbeam of the gantry bracket above the support plate. The guide sleeve is vertically fixed on the horizontal support or the crossbeam above the support plate. A connecting rod that slides upward through the guide sleeve is vertically fixed at the top of the clamping plate. One end of the connecting rod is hinged to the connecting rod and the other end is hinged to one end of the hinge rod. The other end of the hinge rod is hinged to the drive rod of the clamping drive device.

[0008] Furthermore, a downwardly extending fixing plate is fixedly installed on the horizontal bracket or beam above the support plate, and the guide sleeve is fixedly installed on the fixing plate and coaxial with the support plate.

[0009] Furthermore, the hinge rod is an "L"-shaped or "V"-shaped rod, and the lengths of the hinge rod on both sides of the center of the hinge with respect to the transverse support or beam are inconsistent.

[0010] Furthermore, the length of the hinge rod near the hinge side of the driving rod of the clamping drive device is less than the length of the hinge rod near the hinge side of the connecting rod.

[0011] Furthermore, a downwardly extending adjusting screw is fixedly provided at the bottom end of the support plate, and an adjusting nut is threaded onto the adjusting screw. The adjusting screw rotates through the transverse bracket, and the lower end face of the adjusting nut connected to the adjusting screw is placed against the top surface of the transverse bracket.

[0012] Furthermore, a bracket is fixedly installed on the top surface of the horizontal bracket below the support plate, the bottom ends of the side plates on both sides of the bracket are fixedly connected to the top surface of the horizontal bracket, a top plate is fixedly installed on the top of the side plates on both sides of the bracket, a through hole is provided on the top plate of the bracket, the adjusting screw rotates through the through hole on the top plate of the bracket, and the lower end face of the adjusting nut connected to the adjusting screw is placed against the top plate of the bracket.

[0013] Furthermore, a locking nut is threadedly connected to the lower section of the adjusting screw on the top plate of the bracket, and an outwardly extending force rod is fixedly provided on the outer surface of the adjusting nut.

[0014] Furthermore, the top of the support plate and / or the bottom of the clamping plate are provided with at least one tire shaping groove of different diameters. The air supply hole is connected to the inner surface of the innermost tire shaping groove on the top of the support plate.

[0015] Furthermore, a downwardly extending sleeve is fixedly provided at the lower end of the transverse support or beam on the side of the clamping disc away from the clamping drive device, and a guide rod is fixedly provided at the top of the clamping disc and slidably connected to the inner wall of the sleeve.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. This utility model uses an inclined clamping drive device, and drives the clamping plate to move up and down to cooperate with the support plate through the hinge rod and connecting rod, so as to reliably clamp the vacuum tire for air tightness testing. After the clamping plate moves upward, it is convenient to install and remove the tire on the support plate, saving time and effort.

[0018] 2. This utility model uses an inclined clamping drive device that is offset from the axis of the support plate, which can effectively reduce the occupation of longitudinal space, thereby increasing the number of layers that can be arranged in the airtightness detection device, and increasing the number of vacuum tires that the array detection system can detect at the same time, thus improving the detection efficiency.

[0019] 3. The clamping drive device of this utility model clamps the vacuum tire by driving the clamping disc to move up and down through the hinge rod and connecting rod. The damping control of the hinge rod and connecting rod can buffer the clamping instability caused by pressure fluctuations during clamping, thereby improving the clamping reliability during testing. Furthermore, it eliminates the existing locking key and locking mechanism, simplifying the overall structure and testing process, and further improving testing efficiency.

[0020] Therefore, this utility model has the characteristics of simple structure, reliable clamping, safety and convenience, and high detection efficiency. Attached Figure Description

[0021] Figure 1 This is one of the structural schematic diagrams of this utility model;

[0022] Figure 2 This is the second schematic diagram of the structure of this utility model;

[0023] Figure 3 This is the third schematic diagram of the structure of this utility model;

[0024] In the diagram: 1-Gantry support, 1-1-Crossbeam, 2-Horizontal support, 3-Support plate, 3-1-Air supply hole, 3-2-Adjusting screw, 3-3-Adjusting nut, 3-4-Locking nut, 3-5-Forcer rod, 4-Clamping plate, 4-1-Connecting rod, 5-Clamping drive device, 6-Air supply pipe, 7-Guide sleeve, 8-Hinge rod, 9-Connecting rod, 10-Fixing plate, 11-Sleeve, 12-Guide rod, 13-Support. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this utility model.

[0026] like Figure 1 , 2 As shown in Figure 3, this utility model includes a gantry support 1, a horizontal support 2, a support plate 3, a clamping plate 4, and a clamping drive device 5. The two ends of the horizontal support 2 are fixedly connected to the two vertical beams on both sides of the gantry support 1. The support plate 3 is arranged upward on the upper part of the horizontal support 2. The bottom or side of the support plate 3 is provided with an air supply hole 3-1 that connects to the top. The air supply hole 3-1 is connected to the air supply pipe 6 of the high-pressure air supply system. The clamping plate 4 is arranged vertically above the support plate 3.

[0027] It also includes a guide sleeve 7, a hinge rod 8, and a connecting rod 9. The clamping drive device 5 is inclinedly hinged to the vertical beam of the gantry bracket 1 above the support plate 3. The middle part of the hinge rod 8 is hinged to the horizontal support 2 above the support plate 3 or the horizontal beam 1-1 of the gantry bracket 1. The guide sleeve 7 is vertically fixed on the horizontal support 2 or the horizontal beam 1-1 above the support plate 3. The top of the clamping plate 4 is vertically fixed with a connecting rod 4-1 that slides upward through the guide sleeve 7. One end of the connecting rod 9 is hinged to the connecting rod 4-1 and the other end is hinged to one end of the hinge rod 8. The other end of the hinge rod 8 is hinged to the drive rod of the clamping drive device 5.

[0028] A downwardly extending fixing plate 10 is fixedly installed on the horizontal bracket 2 or crossbeam 1-1 above the support plate 3, and the guide sleeve 7 is fixedly installed on the fixing plate 10 and coaxial with the support plate 3.

[0029] The gantry support 1 has two horizontal beams 1-1 arranged parallel to each other at intervals. The hinge rod 8 and connecting rod 9 are arranged between the two horizontal beams 1-1 and the hinge rod 8 is hinged to either of the horizontal beams 1-1. The fixing plate 10 extends downward and is fixedly arranged on the inner side of the horizontal support 2 above the support plate 3 or on the inner side of any horizontal beam 1-1.

[0030] The hinge rod 8 is an "L" or "V" shaped rod, and the lengths of the hinge rod 8 on both sides of the center of the hinge point with the transverse support 2 or the crossbeam 1-1 are inconsistent.

[0031] The length of the hinge rod 8 near the hinge side of the driving rod of the clamping drive device 5 is less than the length of the hinge side near the connecting rod 9.

[0032] The bottom end of the support plate 3 is fixedly provided with a downwardly extending adjusting screw 3-2, and an adjusting nut 3-3 is threadedly connected to the adjusting screw 3-2. The adjusting screw 3-2 rotates through the transverse bracket 2, and the lower end face of the adjusting nut 3-3 connected to the adjusting screw 3-2 is placed against the top surface of the transverse bracket 2.

[0033] A bracket 13 is fixedly installed on the top surface of the horizontal bracket 2 below the support plate 3. The bottom ends of the side plates on both sides of the bracket 13 are fixedly connected to the top surface of the horizontal bracket 2. A top plate is fixedly installed on the top of the side plates on both sides of the bracket 13. A through hole is provided on the top plate of the bracket 13. The adjusting screw 3-2 rotates through the through hole on the top plate of the bracket 13. The lower end face of the adjusting nut 3-3 connected to the adjusting screw 3-2 is placed against the top plate of the bracket 13.

[0034] The adjusting screw 3-2 is threaded with a locking nut 3-4 on the lower section of the top plate of the bracket 13, and an outwardly extending force rod 3-5 is fixedly provided on the outer surface of the adjusting nut 3-3.

[0035] The top of the support plate 3 and / or the bottom of the clamping plate 4 are provided with at least one tire shaping groove of different diameters. The air supply hole 3-1 is connected to the inner side of the tire shaping groove on the top of the support plate 3.

[0036] The lower end of the transverse support 2 or the crossbeam 1-1 is fixedly provided with a downwardly extending sleeve 11 on the side of the clamping disc 4 away from the clamping drive device 5, and the top end of the clamping disc 4 is fixedly provided with a guide rod 12 that is slidably connected to the inner wall of the sleeve 11.

[0037] The clamping drive device 5 is a hydraulic cylinder, a pneumatic cylinder, or a linear motor.

[0038] The working process of this utility model is as follows:

[0039] like Figure 1 , 2 As shown in Figure 3, before starting work, select and fix the corresponding support plate 3 and clamping plate 4 according to the structure, specifications and other parameters of the vacuum tire to be tested. Then, hold the lever 3-5 and rotate the adjusting nut 3-3 to move the adjusting screw 3-2 up or down, thereby adjusting the minimum distance between the support plate 3 and the clamping plate 4 to match the width of the tire to be tested. After adjustment, rotate the locking nut 3-4 to make the adjusting nut 3-3 press against the top plate of the bracket 13 to prevent loosening during the test.

[0040] During operation, the tire to be tested is placed on the support plate 3, with its inner edge either locked into the tire shaping groove or positioned outside the groove. The switch is then activated, and the clamping plate 4 moves downward under the drive of the cylinder (i.e., the clamping drive device 5), clamping the tire under the combined action of the support plate 3. Subsequently, the air supply pipe 6 is triggered to inject compressed air at a predetermined pressure into the enclosed space inside the tire through the air supply port 3-1. The pressure is then maintained for a period of time. During and after this pressure maintenance, the operator only needs to check the pressure gauge and make simple touch and judgment to find the leak, thus directly and accurately determining the strength and sealing performance of the tire. After the test is completed, the operator turns off the switch, and the mechanisms reverse the above process to remove the tested tire and place it in the corresponding position, completing one tire airtightness test. Multiple sets of the above testing devices can be installed on the gantry bracket 1, allowing one person to simultaneously complete the strength and airtightness tests of multiple tires, significantly improving testing efficiency.

[0041] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An air tightness testing device for vacuum tire production, comprising a gantry support (1), a transverse support (2), a support plate (3), a clamping plate (4), and a clamping drive device (5), wherein the two ends of the transverse support (2) are fixedly connected to the two vertical beams on both sides of the gantry support (1), the support plate (3) is disposed upward on the upper part of the transverse support (2), and the bottom or side of the support plate (3) is provided with an air supply hole (3-1) communicating with the top, the air supply hole (3-1) is connected to the air supply pipe (6) of the high pressure air supply system, and the clamping plate (4) is disposed above the support plate (3) in a way that can move up and down; Its characteristics are: It also includes a guide sleeve (7), a hinge rod (8), and a connecting rod (9). The clamping drive device (5) is inclinedly hinged to the vertical beam of the gantry bracket (1) above the support plate (3). The middle part of the hinge rod (8) is hinged to the horizontal support (2) above the support plate (3) or the cross beam (1-1) of the gantry bracket (1). The guide sleeve (7) is vertically fixed on the horizontal support (2) or the cross beam (1-1) above the support plate (3). The top of the clamping plate (4) is vertically fixed with a connecting rod (4-1) that slides upward through the guide sleeve (7). One end of the connecting rod (9) is hinged to the connecting rod (4-1) and the other end is hinged to one end of the hinge rod (8). The other end of the hinge rod (8) is hinged to the drive rod of the clamping drive device (5).

2. The airtightness testing device for vacuum tire production according to claim 1, characterized in that: A downwardly extending fixing plate (10) is fixedly installed on the horizontal support (2) or crossbeam (1-1) above the support plate (3), and the guide sleeve (7) is fixedly installed on the fixing plate (10) and coaxial with the support plate (3).

3. The airtightness testing device for vacuum tire production according to claim 1, characterized in that: The hinge rod (8) is an "L" or "V" shaped rod, and the lengths of the hinge rod (8) on both sides of the center of the hinge with the transverse support (2) or the crossbeam (1-1) are inconsistent.

4. The airtightness testing device for vacuum tire production according to claim 3, characterized in that: The length of the hinge rod (8) on the hinge side of the drive rod near the clamping drive device (5) is less than the length of the hinge side of the connecting rod (9).

5. The airtightness testing device for vacuum tire production according to any one of claims 1 to 4, characterized in that: The bottom end of the support plate (3) is fixedly provided with a downwardly extending adjusting screw (3-2), and an adjusting nut (3-3) is threadedly connected to the adjusting screw (3-2). The adjusting screw (3-2) rotates through the transverse bracket (2), and the lower end face of the adjusting nut (3-3) connected to the adjusting screw (3-2) is placed against the top surface of the transverse bracket (2).

6. The airtightness testing device for vacuum tire production according to claim 5, characterized in that: A bracket (13) is fixedly installed on the top surface of the horizontal bracket (2) below the support plate (3). The bottom ends of the side plates on both sides of the bracket (13) are fixedly connected to the top surface of the horizontal bracket (2). A top plate is fixedly installed on the top of the side plates on both sides of the bracket (13). A through hole is provided on the top plate of the bracket (13). The adjusting screw (3-2) rotates through the through hole on the top plate of the bracket (13). The lower end face of the adjusting nut (3-3) connected to the adjusting screw (3-2) is placed against the top plate of the bracket (13).

7. The airtightness testing device for vacuum tire production according to claim 6, characterized in that: The adjusting screw (3-2) is threaded with a locking nut (3-4) on the lower section of the top plate of the bracket (13), and an outwardly extending force rod (3-5) is fixedly provided on the outer surface of the adjusting nut (3-3).

8. The airtightness testing device for vacuum tire production according to claim 6, characterized in that: The top of the support plate (3) and / or the bottom of the clamping plate (4) are provided with at least one tire shaping groove of different diameters, and the air supply hole (3-1) is connected to the inner side of the tire shaping groove at the top of the support plate (3).

9. The airtightness testing device for vacuum tire production according to claim 6, characterized in that: The lower end of the transverse support (2) or beam (1-1) is fixedly provided with a downwardly extending sleeve (11) on the side of the clamping disc (4) away from the clamping drive device (5), and the top of the clamping disc (4) is fixedly provided with a guide rod (12) that is slidably connected to the inner wall of the sleeve (11).

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