Tire pinning test device

Abstract

The utility model relates to the technical field of tire testing, in particular to a tire pinning testing device. The testing device comprises a rack, a testing rotating shaft which rotates on the rack and is used for coaxially assembling a to-be-tested tire, a testing nail assembly which is driven by an operation part and can be inserted into and far away from the to-be-tested tire, and a ratchet mechanism which can drive the testing rotating shaft to do equal-angle stepping rotation in a unidirectional intermittent manner, a transmission ratchet wheel of the ratchet wheel mechanism is coaxially fixed on the test rotating shaft, and a pawl of the ratchet wheel mechanism is in transmission fit with the operation part through the linkage mechanism and drives the transmission ratchet wheel to generate one-time stepping rotation action in a motion period that the operation part drives the test nail assembly to be inserted and then is away from the to-be-tested tire to reset. According to the utility model, the linkage matching between the nail driving structure and the tire rotating structure can be realized, the cost is low, the arrangement uniformity of puncture holes in the tire can be ensured, and the consistency of data of adjacent tests is further maintained.

Description

TECHNICAL FIELD

[0001] The utility model relates to tire testing technical field, concretely is a kind of tire nail testing device. BACKGROUND

[0002] Tire is one of important components of automobile, and its puncture prevention, leakage prevention, even explosion-proof performance is particularly important.

[0003] The tire nail testing device is mostly as the text in the name of indoor tire nail experiment equipment of Chinese patent publication No.CN218330623U, the placing station of tire is formed by two rotatable rollers, so that tire can rotate around its axis;Meanwhile, a lever is arranged, so that the lever is driven to act by hydraulic mechanism located at the power end of lever, so that the nail located at the action end of lever acts to puncture the tire tread.

[0004] Obviously, the above-mentioned existing structure is actually used, and the rotation action of tire after each tire puncture needs to be completed manually by artificial experience, and the consistency of rotation angle of tire each time is difficult to grasp, and then the puncture interval of tire tread is different, the puncture hole arrangement is disorderly, and even the adjacent puncture holes appear puncture interference phenomenon, so that the consistency of adjacent test data is affected. Some manufacturers have also considered to develop fully automatic tire rotating equipment, but the cost of the equipment is further increased by motor and matched PLC, and the volume of forming equipment is also larger, which is not conducive to the actual demand of current manufacturers. Therefore, it is urgent to solve. UTILITY MODEL CONTENT

[0005] In order to avoid and overcome the technical problems existing in the prior art, the utility model provides a tire nail testing device, which can realize the linkage cooperation between the nail driving structure and the tire rotating structure, is not only low in cost, but also can ensure the uniformity of puncture hole arrangement on tire, and then keep the consistency of adjacent test data.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A tire nail testing device, comprising a rack, a test rotating shaft coaxially assembled with a tire to be tested rotating on the rack and a test nail assembly driven by an operating part and capable of inserting and moving away from the tire to be tested, the testing device further comprises a ratchet mechanism capable of intermittently driving the test rotating shaft to rotate at equal angles, the transmission ratchet of the ratchet mechanism is coaxially fixed on the test rotating shaft, the pawl of the ratchet mechanism is in transmission cooperation with the operating part through a linkage mechanism, and drives the transmission ratchet to produce a step rotation action in a movement cycle of the operating part driving the test nail assembly to insert and then move away from the tire to be tested.

[0008] As a further scheme of the utility model: the linkage mechanism includes the lever that rotates and cooperates on the frame, the rotation axis of the lever is parallel with the axis of the transmission ratchet, the first end of the lever is connected with the operation part through the connecting rod assembly, the pawl rotates and cooperates on the second end of the lever.

[0009] As a further scheme of the utility model: the operation part is the pressure bar that rotates and cooperates with the connecting end of the test nail assembly in the middle, the first end of the pressure bar constitutes the operation end, the second end of the pressure bar constitutes the assembly end connected with the connecting rod assembly;The connecting rod assembly includes the rotating frame that rotates and cooperates on the frame, the first end of the rotating frame is hinged with the assembly end, the second end of the rotating frame is hinged with the transmission connecting rod, the transmission connecting rod is hinged and cooperated with the second end of the lever;Wherein, the rotation axis of the pressure bar, the rotating frame and the transmission connecting rod are all parallel with the rotation axis of the lever.

[0010] As a further scheme of the utility model: the operation part is the pressure bar, the pressure bar is hinged and cooperated on the hinge support of the frame, the connecting rod assembly is the drive rod that is hinged with the pressure bar and the first end of the lever respectively, the pressure bar is further hinged with the floating joint that is hinged and cooperated with the connecting end of the test nail assembly, the drive rod, the hinge support and the floating joint are sequentially arranged along the length direction of the pressure bar, and the intersection axes of the three are all parallel with the rotation axis of the lever.

[0011] As a further scheme of the utility model: the test nail assembly includes the slide bar and the nail that is coaxially detachably fixed on the first end of the slide bar, the slide bar is slidably cooperated on the frame along the circumferential direction of itself, and the second end of the slide bar forms the connecting end of the test nail assembly connected with the operation part.

[0012] As a further scheme of the utility model: the axis of the transmission ratchet is horizontally arranged, the pawl is above the horizontal plane where the axis of the transmission ratchet is located, and the pawl is attached to the outer surface of the transmission ratchet by its own gravity and / or spring force.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] 1、In the application, the ratchet mechanism that can drive the measured tire to step and rotate unidirectionally intermittently is arranged, and the operation part that drives the test nail assembly to move is also connected with the ratchet mechanism through the linkage mechanism, so that the operation part drives the ratchet mechanism to perform a step and rotate after the test nail assembly is driven to pierce into and pull out of the measured tire, so that the measured tire is rotated by an equal angle after the test nail assembly pierces and tests once, thereby realizing uniform piercing on the outer periphery of the measured tire and ensuring consistency of each test.

[0015] In addition, the cooperation movement of the ratchet mechanism for driving the rotation of the tire to be tested and the test nail assembly is realized by relying on the mechanical linkage mechanism, which is low in cost and high in reliability, and in execution, only a single driving operation part needs to be driven by the motor structure or manually, thereby improving the convenience of the test operation.

[0016] 2. The rotation axis of the pawl is fixed to realize the fixed track movement around the axis of the lever by the swing of the lever, thereby ensuring the consistency of the pawl in each execution process. Meanwhile, the labor-saving structure formed by the lever also improves the convenience of the movement of the manual driving operation part.

[0017] 3. In the embodiment 1 provided by the application, the connecting end of the test nail assembly is used as the fulcrum of the pressure rod rotation, the pressure rod is used to apply the downward pressure force to the fulcrum to drive the downward pressure of the test nail assembly, and the rotation of the rotating frame is also driven, thereby having a good labor-saving effect.

[0018] 4. In the embodiment 2 provided by the application, the arrangement of the linkage assembly is simpler, the linkage assembly is only composed of the driving rod, and therefore, when realizing the linkage cooperation of the driving part and the ratchet mechanism, the factors such as transmission dead point need to be considered less, so that the device is easier to debug and produce. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic view of the utility model.

[0020] Figure 2 It is a first state schematic view of the linkage mechanism in the embodiment 1 of the utility model.

[0021] Figure 3 It is a comparison schematic view of the first state and the second state of the linkage mechanism in the embodiment 1 of the utility model.

[0022] Figure 4 It is Figure 3 A partial enlarged structure schematic view of the utility model.

[0023] Figure 5 It is a first state schematic view of the linkage mechanism in the embodiment 2 of the utility model.

[0024] Figure 6 It is a structural schematic view of the utility model in which the tire to be tested is installed.

[0025] In the drawing: 10, rack; 11, hinged support; 20, test rotating shaft; 30, test nail assembly; 31, sliding rod; 32, nail; 33, floating joint; 40, operation part; 41, pressure rod; 50, linkage mechanism; 51, rotating frame; 52, transmission connecting rod; 53, lever; 54, driving rod; 61, pawl; 62, transmission ratchet; a, tire to be tested. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor fall within the scope of protection of the utility model.

[0027] For the convenience of understanding, the specific structure and working mode of the utility model are described further as follows in combination with the drawings:

[0028] The specific structure of the utility model refers to Figures 1-6 The main structure thereof comprises a rack 10, a test rotating shaft 20 coaxially assembled with the tire a to be tested and rotating on the rack 10, and a test nail assembly 30 driven by an operating part 40 and capable of being inserted into and away from the tire a to be tested.

[0029] Specifically, as shown in Figure 2 The test nail assembly 30 comprises a slide rod 31 and a nail 32. The slide rod 31 is slidingly fitted on the rack 10 along the circumferential direction thereof, effectively ensuring the stability of the test nail assembly 30 when it is inserted into and away from the tire a to be tested. The nail 32 is coaxially and detachably fixed at the first end of the slide rod 31. The second end of the slide rod 31 forms a connecting end of the test nail assembly 30 connected with the operating part 40, facilitating the nail 32 remaining on the tire a to be tested when the utility model is used for ordinary tire nail testing, and the replacement of the nail 32 when it is worn out after being pulled out when the utility model is used for self-sealing tire nail testing. The difference lies in that the nail 32 pulled out of the tire needs to be stable when it is fixed with the slide rod 31, and can be detachably fixed by using a bolt or a threaded fixing method. The nail 32 remaining in the tire can be relatively loose when it is fixed with the slide rod 31, and can be fixed by using a magnetic attraction or elastic fixing method.

[0030] As shown in Figures 2-5 The test device further comprises a ratchet mechanism capable of intermittently driving the test rotating shaft 20 to stepwise rotate at equal angles. A transmission ratchet 62 of the ratchet mechanism is coaxially fixed on the test rotating shaft 20. A pawl 61 of the ratchet mechanism is drivingly matched with the operating part 40 through a linkage mechanism 50, and drives the transmission ratchet 62 to produce a stepwise rotating action in one motion cycle of the pawl 61 returning after the operating part 40 drives the test nail assembly 30 to be inserted into and away from the tire a to be tested. Specifically, when the operating part 40 drives the nail 32 of the test nail assembly 30 to be inserted into the tire a to be tested, the tip of the pawl 61 is driven by the linkage mechanism 50 to slide from the groove bottom of the first tooth groove of the transmission ratchet 62 (the pawl 61 shown by the dashed line in the figure) to the tooth back of the adjacent second tooth groove (the pawl 61 shown by the dashed line in the figure). Figure 3 Figure 3 ​The middle solid line shows the pawl 61); when the operation part 40 reversely drives the nail 32 of the test nail assembly 30 to pull out of the tire a to be tested, the linkage mechanism 50 reversely drives the tip of the pawl 61 to insert into the groove bottom of the second tooth groove along the tooth back of the second tooth groove, and then when the operation part 40 continues to drive the test nail assembly 30 away from the tire a to be tested, the pawl 61 pushes the transmission ratchet 62 to rotate and makes the second tooth groove rotate to the initial position of the first tooth groove, thereby making the transmission ratchet 62 produce a step rotation action. Of course, if the tire a to be tested is a normal tire, the nail 32 needs to remain on the tire, and in the above driving action, the movement stroke of the pawl 61 can be reduced, that is, the transmission ratchet 62 does not need to be pushed to rotate after the nail 32 is pulled out.

[0031] In the present application, a ratchet mechanism capable of intermittently driving the tire a to be tested to step rotate in one direction is provided, and the operation part 40 driving the test nail assembly 30 is also connected with the ratchet mechanism through the linkage mechanism 50, so that the operation part 40 drives the ratchet mechanism to perform a step rotation action at the same time after driving the test nail assembly 30 to penetrate into the tire a to be tested and pull out, so that the tire a to be tested rotates by an equal angle after one penetration test of the test nail assembly 30, thereby achieving uniform penetration on the outer periphery of the tire a to be tested and ensuring consistency of each test. In addition, the cooperation between the ratchet mechanism driving the tire a to be tested to rotate and the test nail assembly 30 is realized by the mechanical linkage mechanism 50, which not only has low cost and high reliability, but also only needs to drive the operation part 40 by a motor structure or manual driving mode during execution, thereby improving the convenience of test operation.

[0032] Further, as shown in Figure 2 The linkage mechanism 50 includes a lever 53 pivotally connected to the rack 10, the rotation axis of the lever 53 is parallel to the axis of the transmission ratchet 62, the first end of the lever 53 is connected with the operation part 40 through a linkage assembly, and the pawl 61 is pivotally connected to the second end of the lever 53. The rotation axis of the pawl 61 moves along a fixed track around the axis of the lever 53 by swinging the lever 53, thereby ensuring the consistency of each execution process of the pawl 61. At the same time, the power-saving structure formed by the lever 53 also improves the convenience of manually driving the operation part 40.

[0033] Of course, in actual implementation, the pawl 61 can also be installed on the cantilever end of a swing arm rotating around the axis of the transmission ratchet 62 in the traditional ratchet mechanism, which can also realize the movement of the pawl 61 along a fixed track, but the power-saving efficiency is slightly lower. In addition, the pawl 61 can also be installed on the outer periphery of a ring rotating around the axis of the transmission ratchet 62.

[0034] On the basis of the above, the present application also provides two embodiments of the linkage assembly.

[0035] Embodiment 1, as shown inFigures 2-4 As shown in the figure, the operating part 40 is a pressure rod 41 which is pivotally connected with the connecting end of the test nail assembly 30, the first end of the pressure rod 41 constitutes an operating end, and the second end of the pressure rod 41 constitutes an assembling end which is connected with a linkage assembly. The linkage assembly comprises a rotating frame 51 which is pivotally connected with the frame 10, the first end of the rotating frame 51 is hingedly connected with the assembling end, and the second end of the rotating frame 51 is hingedly connected with a transmission linkage 52, the transmission linkage 52 is hingedly connected with the second end of a lever 53; wherein the rotating axes of the pressure rod 41, the rotating frame 51 and the transmission linkage 52 are all parallel to the rotating axis of the lever 53.

[0036] In the embodiment 2, as shown in the figure, the operating part 40 is a pressure rod 41 which is hingedly connected with the hinged support 11 of the frame 10, the linkage assembly is a driving rod 54 which is hingedly connected with the pressure rod 41 and the first end of the lever 53 respectively, and the pressure rod 41 is further hingedly connected with a floating joint 33 which is hingedly connected with the connecting end of the test nail assembly 30, the driving rod 54, the hinged support 11 and the floating joint 33 are arranged along the length direction of the pressure rod 41 in sequence, and the intersecting axes of the three are all parallel to the rotating axis of the lever 53. Figure 5 In the actual implementation of the present application, the tire a to be tested can be arranged in an axial vertical manner or in an axial horizontal manner. In order to facilitate the understanding of the up-down and left-right relationships in the following description of the working principle of the linkage assembly, the up-down and left-right relationships in the following description of the working principle of the linkage assembly are described in the observation perspective as shown in the figure.

[0037] Figures 2-5 In the embodiment 1, in the normal state, as shown in the figure, when the piercing process of the test nail assembly 30 needs to be performed, the operating end of the pressure rod 41 is pressed down, as shown in the figure, the pressure rod 41 rotates around the connecting end of the test nail assembly 30, and the connecting end of the test nail assembly 30 is pressed down at the same time, so that the test nail assembly 30 slides downward and pierces into the tire a to be tested (wherein the dashed line in the figure represents the normal state of the linkage assembly in the embodiment 1).

[0038] In the embodiment 1, in the normal state, as shown in the figure, when the piercing process of the test nail assembly 30 needs to be performed, the operating end of the pressure rod 41 is pressed down, as shown in the figure, the pressure rod 41 rotates around the connecting end of the test nail assembly 30, and the connecting end of the test nail assembly 30 is pressed down at the same time, so that the test nail assembly 30 slides downward and pierces into the tire a to be tested (wherein the dashed line in the figure represents the normal state of the linkage assembly in the embodiment 1). Figure 2 Figure 3 Figure 3 Figure 2 Figure 4

[0039] ​​​​​​Afterwards, when the test nail assembly 30 is in the process of withdrawing the nail, the operating end of the pressing rod 41 is lifted up, the test nail assembly 30 is lifted up, at the same time, the rotating frame 51 rotates counterclockwise, the first end of the lever 53 drives the pawl 61 to be lifted up, the connecting mechanism 50 reversely drives the tip of the pawl 61 to be inserted into the bottom of the second tooth groove along the tooth back of the second tooth groove. When the nail 32 in the test nail assembly 30 is completely withdrawn from the tire a to be tested, the operating end of the pressing rod 41 is continuously lifted up, the pawl 61 drives the transmission ratchet 62 to rotate and the second tooth groove rotates to the initial position of the first tooth groove, thus the transmission ratchet 62 generates a step rotation action.

[0040] In the embodiment 1, the connecting end of the test nail assembly 30 is used as the rotation fulcrum of the pressing rod 41, the test nail assembly 30 is driven to be pressed down by the pressing rod 41 applying a downward force to the fulcrum, at the same time, the rotating frame 51 is driven to rotate, which has a good labor-saving effect.

[0041] In the embodiment 2, as shown in the figure, Figure 5 When the test nail assembly 30 is in the process of inserting the nail, the end of the pressing rod 41 adjacent to the floating joint 33 is pressed down, the pressing rod 41 drives the test nail assembly 30 to slide down and penetrate into the tire a to be tested by using the hinged support 11 as the rotation fulcrum, at the same time, the pressing rod 41 drives the driving rod 54 to move up, and then drives the second end of the lever 53 to be lifted up. When the second end of the lever 53 is lifted up, the first end of the lever 53 drives the pawl 61 to move down, thus the tip of the pawl 61 is inserted into the bottom of the second tooth groove along the tooth back of the second tooth groove.

[0042] Afterwards, when the test nail assembly 30 is in the process of withdrawing the nail, the end of the pressing rod 41 adjacent to the floating joint 33 is lifted up, the test nail assembly 30 is lifted up, at the same time, the first end of the lever 53 drives the pawl 61 to be lifted up, the connecting mechanism 50 reversely drives the tip of the pawl 61 to be inserted into the bottom of the second tooth groove along the tooth back of the second tooth groove. When the nail 32 in the test nail assembly 30 is completely withdrawn from the tire a to be tested, the end of the pressing rod 41 adjacent to the floating joint 33 is continuously lifted up, the pawl 61 drives the transmission ratchet 62 to rotate and the second tooth groove rotates to the initial position of the first tooth groove, thus the transmission ratchet 62 generates a step rotation action.

[0043] In the embodiment 2, the arrangement of the connecting rod assembly is simpler, the connecting rod assembly is only composed of the driving rod 54, thus when the connecting and cooperating between the operating part 40 and the ratchet mechanism is realized, there are less factors such as transmission dead point to be considered, which makes the device easier to debug and produce.

[0044] On the basis of the above, Figures 2-5As shown, the axis of the transmission ratchet 62 is horizontally arranged, and the resistance of rotating the tire a to be tested is smaller in comparison with the vertically arranged mode relative to the axis. In addition, the pawl 61 is located above the horizontal plane where the axis of the transmission ratchet 62 is located, and the pawl 61 is in contact with the outer surface of the transmission ratchet 62 by its own gravity and / or spring elastic force. When the gravity of the pawl 61 is larger, the pawl 61 can be rotated by its own gravity without the need of torsional driving by the spring structure such as a tension spring or a torsion spring.

[0045] Of course, for those skilled in the art, the present application is not limited to the details of the above exemplary embodiments, but also includes the same or similar structures that can be realized in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting in any aspect, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0046] In addition, it should be understood that although the present application is described in the specification in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

[0047] The technical, shape and structure parts not described in detail in the present application are well-known technologies.

Claims

1. A tyre nailing test apparatus comprising a frame (10), a test rotating shaft (20) which is pivoted on the frame (10) for coaxially fitting a tyre (a) to be tested, and a test nail assembly (30) which is driven by an operating portion (40) and is insertable and removable from the tyre (a) to be tested, characterized in that, The testing device further comprises a ratchet mechanism for intermittently driving the testing rotating shaft (20) to rotate at equal angles, a driving ratchet (62) of the ratchet mechanism is coaxially fixed on the testing rotating shaft (20), a pawl (61) of the ratchet mechanism is in transmission cooperation with the operating part (40) through a linkage mechanism (50), and the driving ratchet (62) is driven to rotate once in a movement cycle of the pawl (61) being reset away from the tire (a) to be tested after the operating part (40) drives the testing nail assembly (30) to be inserted.

2. A tyre spike testing device according to claim 1, wherein The linkage mechanism (50) comprises a lever (53) pivotally fitted on the frame (10), a rotation axis of the lever (53) is parallel to an axis of the driving ratchet (62), a first end of the lever (53) is in transmission connection with the operating part (40) through a linkage assembly, and the pawl (61) is pivotally fitted on a second end of the lever (53).

3. A tyre spike testing device according to claim 2, wherein The operating part (40) is a pressure rod (41) with a middle part pivotally fitted with a connecting end of the testing nail assembly (30), a first end of the pressure rod (41) constitutes an operating end, a second end of the pressure rod (41) constitutes an assembly end connected with the linkage assembly; the linkage assembly comprises a rotating frame (51) pivotally fitted on the frame (10), a first end of the rotating frame (51) is hinged with the assembly end, a second end of the rotating frame (51) is hinged with a transmission linkage (52), the transmission linkage (52) is hingedly cooperated with the second end of the lever (53); wherein, rotation axes of the pressure rod (41), the rotating frame (51) and the transmission linkage (52) are all parallel to the rotation axis of the lever (53).

4. A tire spike testing device as defined in claim 2, wherein, The operating part (40) is a pressure rod (41) hingedly fitted on a hinged support (11) of the frame (10), the linkage assembly is a driving rod (54) with two ends respectively hingedly connected with the pressure rod (41) and a first end of the lever (53), the pressure rod (41) is further hingedly provided with a floating joint (33) hingedly cooperated with a connecting end of the testing nail assembly (30), the driving rod (54), the hinged support (11) and the floating joint (33) are sequentially arranged along a length direction of the pressure rod (41), and intersection axes of the three are all parallel to the rotation axis of the lever (53).

5. A tyre spike testing device according to any one of claims 1 to 4, wherein The testing nail assembly (30) comprises a slide rod (31) and a nail (32) coaxially and detachably fixed on a first end of the slide rod (31), the slide rod (31) is slidingly fitted on the frame (10) along a circumferential direction of the slide rod (31), and a second end of the slide rod (31) forms a connecting end of the testing nail assembly (30) connected with the operating part (40).

6. A tyre spike testing device according to any one of claims 1 to 4, wherein The axis of the driving ratchet (62) is horizontally arranged, the pawl (61) is located above a horizontal plane where the axis of the driving ratchet (62) is located, and the pawl (61) is in contact with an outer surface of the driving ratchet (62) by gravity and / or spring force.

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