PU tire assembly device and assembly method

Abstract

The application provides a PU tire assembling device, which is suitable for assembling PU tires. The PU tire comprises a tire body and a hub. The device comprises a base, a conical cylinder and a driving device. The base is used for positioning the hub. The conical cylinder is conical and has a small end and a large end. The tire body is slidably sleeved on the small end of the conical cylinder. The large end of the conical cylinder is detachably abutted against the base. The conical cylinder is located between the driving device and the base. The driving device is controllably lifted and detachably slidably sleeved on the conical cylinder. The driving device can push the tire body from the small end of the conical cylinder to slide downward along the conical cylinder. After the tire body slides off the conical cylinder, the tire body is sleeved on the hub. With the device, the PU tire can be quickly, efficiently and conveniently assembled. The application further provides a PU tire assembling method.

Description

Technical Field

[0001] This invention relates to the field of PU tires, and more particularly to a PU tire assembly apparatus and assembly method. Background Technology

[0002] With the advancement of the times and the improvement of living standards, the wheels of strollers or children's toys have many different designs. Traditional pneumatic tires have an outer tire and an inner tire. The outer tire is made of rubber, while the inner tire is hollow. When using them, the inner tire must be inflated first. This type of pneumatic tire has the disadvantage of being prone to punctures, and even if it does not puncture, it still has the inconvenience of needing to be inflated frequently.

[0003] Given the drawbacks of pneumatic tires, imitation pneumatic tires were developed and have seen significant growth. Imitation pneumatic tires mainly consist of a filled tire and a rim. The filled tire is made from foamed materials, with polyurethane (PU) resin being the most typical. PU resin is widely used in imitation pneumatic tires due to its high elasticity, excellent wear resistance (2-10 times that of NR), good oil resistance, ozone resistance, and low-temperature performance. Therefore, the filled tire of a PU tire contains at least PU resin. Currently, PU tires are assembled by using mechanical grippers to open the filled tire, placing it in a jig to hold the rigid plastic component, and then mounting it to the rim. However, the high strength of the filled tire made of PU resin makes it difficult for the mechanical grippers to open it, resulting in low assembly efficiency.

[0004] Therefore, there is an urgent need to develop a convenient and efficient PU tire assembly method to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a PU tire assembly device and a PU tire assembly method, which can quickly, efficiently and conveniently assemble PU tires.

[0006] To achieve the above objectives, the present invention provides a PU tire assembly apparatus suitable for assembling PU tires. The PU tire includes a tire body and a rim, comprising:

[0007] The base is used to position the wheel hub.

[0008] The cone is conical and has a small end and a large end. The tire body can be slidably fitted onto the small end of the cone, and the large end of the cone can be detachably abutted against the base.

[0009] The drive unit has a cone located between the drive unit and the base. The drive unit is operated to be raised and lowered controllably and can be slidably fitted onto the cone. The drive unit can push the tire body from the small end of the cone and slide it down the cone. After the tire body slides off the cone, it is fitted onto the wheel hub.

[0010] Preferably, the base includes a base body and a positioning element protruding from the base body.

[0011] Ideally, the positioning component and the base body are integrated into one structure.

[0012] Preferably, the diameter of the large end of the cone is greater than or equal to the diameter of the hub.

[0013] Preferably, the cone includes a bottom and a wall, the bottom and the wall forming a hollow cone.

[0014] Preferably, the bottom is provided with a clearance hole, and the positioning member has a boss that cooperates with the clearance hole for positioning.

[0015] Preferably, the driving device includes a pressure ring, which includes a lower base plate and an upper base plate. The lower base plate is annular, and there is a certain distance between the lower base plate and the upper base plate. Several support members are provided between the lower base plate and the upper base plate.

[0016] Preferably, the driving device further includes a driving unit for driving the pressure ring to perform lifting and lowering movements.

[0017] Compared with the prior art, the PU tire assembly device of the present invention is suitable for assembling PU tires. It includes a base, a cone, and a drive device. In use, the wheel hub is first positioned on the base, then the tire body is inserted into the cone through the small end, then the cone is placed against the base and on the wheel hub. Then, the drive device applies downward pressure to the tire body, so that the tire body moves to the large end and is inserted into the wheel hub, thus completing the assembly of the tire body and the wheel hub. This avoids the problem that "PU tires are strong, and the mechanical claws are not easy to expand, resulting in low assembly efficiency". Therefore, the PU tires can be assembled quickly, efficiently, and conveniently with the help of the base, cone, and drive device.

[0018] On the other hand, the present invention also provides a PU tire assembly method, which uses the above-mentioned PU tire assembly device for assembly, and the assembly steps include:

[0019] Position the hub on the base;

[0020] The tire body is inserted into the cone through the small end of the cone;

[0021] The large end of the cone abuts against the base and is located on the hub;

[0022] The drive device applies downward pressure to the tire body, causing the tire body to slide downward along the cone. After moving to the large end, the tire body slides away from the cone and is fitted onto the wheel hub.

[0023] Preferably, the tire body contains PU material. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the PU tire in the PU tire assembly device of the present invention.

[0025] Figure 2 yes Figure 1 The diagram shown is an exploded view of a PU tire.

[0026] Figure 3 This is a diagram showing the tire body being inserted into the cone from the small end in the PU tire assembly device of the present invention.

[0027] Figure 4 This is a diagram showing the state of the PU tire assembly device of the present invention, in which the drive device drives the tire body to move to the large end and fit into the wheel hub.

[0028] Figure 5 yes Figure 3 Cross-sectional view.

[0029] Component designation explanation

[0030] PU tire 10, tire body 11, inner layer 111, outer layer 113, rim 13, base 30, base body 31, positioning component 33, boss 331, cone 50, bottom 51, wall 53, clearance hole 55, small end 57, large end 59, drive device 70, pressure ring 71, upper base plate 711, opening 712, lower base plate 713, support component 715. Detailed Implementation

[0031] Embodiments of the invention will now be described with reference to the accompanying drawings, in which similar element reference numerals denote similar elements.

[0032] Please refer to Figures 1-5 This invention provides a PU tire assembly device suitable for assembling PU tires 10. The PU tire 10 includes a tire body 11 and a rim 13. Using this device, the tire body 11 is assembled onto the rim 13, which is convenient and efficient. The PU tire assembly device includes a base 30, a cone 50, and a drive device 70. The base 30 is used to position the rim 13. The cone 50 is conical and has a small end 57 and a large end 59. The tire body 11 is slidably fitted onto the small end 57 of the cone 50, and the large end 59 of the cone 50 is detachably abutting against the base 30. The cone 50 is located between the drive device 70 and the base 30. The drive device 70 is operable to raise and lower controllably and is detachably slidably fitted onto the cone 50. The drive device 70 can push the tire body 11 from the small end 57 of the cone 50 to slide downwards along the cone 50. After the tire body 11 slides away from the cone 50, it is fitted onto the rim 13.

[0033] The present invention also provides a PU tire assembly method, wherein the tire body 11 is assembled onto the wheel hub 13 using the above-mentioned PU tire assembly device, and the assembly steps include:

[0034] Position the wheel hub 13 on the base 30;

[0035] The tire body 11 is inserted into the cone 50 through the small end 57 of the cone 50;

[0036] The large end 59 of the cone 50 abuts against the base 30 and is located on the hub 13;

[0037] The operating drive device 70 applies downward pressure to the tire body 11, causing the tire body 11 to slide downward along the cone 50. After moving to the large end 59, the tire body 11 slides away from the cone 50 and is then fitted onto the wheel hub 13.

[0038] Please continue to refer to this. Figure 5 In the above technical solution, the base 30 includes a base body 31 and a positioning member 33 protruding from the base body 31. When the wheel hub 13 is positioned on the base 30, the positioning member 33 extends into the groove of the wheel hub 13. Multiple positioning members 33 can be provided, and the specific design position and number of the positioning members 33 can be designed according to different models of wheel hubs 13 to ensure that the wheel hub 13 can be stably fixed in the base 30. Furthermore, in order to extend the service life of the base 30, the positioning member 33 and the base body 31 are integrally structured.

[0039] Please continue to refer to this. Figure 5In the above technical solution, the cone 50 has a conical structure, with one end being larger, referred to as the large end 59 of the cone 50, and the other end being smaller, referred to as the small end 57 of the cone 50. The tire body 11 is inserted into the cone 50 from the small end 57. Because the small end 57 is smaller, it facilitates the insertion of the tire body 11. Furthermore, the diameter of the large end 59 of the cone 50 is greater than or equal to the diameter of the wheel hub 13. If the diameter of the large end 59 of the cone 50 is smaller than the diameter of the wheel hub 13, it will be difficult for the tire body 11 to smoothly fit into the wheel hub 13. When the diameter of the large end 59 of the cone 50 is greater than or equal to the diameter of the wheel hub 13, the tire body 11 can smoothly enter the wheel hub 13 after detaching from the large end 59. Furthermore, the cone 50 includes a bottom 51 and a wall 53, which together form a hollow cone 50. This reduces material usage and costs, while also reducing weight and facilitating movement and operation. Similarly, for ease of operation, the top of the cone 50 is open. Preferably, the bottom 51 is provided with a clearance hole 55, and the positioning member 33 has a boss 331 that cooperates with the clearance hole 55 for positioning. When the cone 50 abuts against the positioning member 33 of the base 30, some components of the hub 13 require clearance space provided by the clearance hole 55, and the positioning member 33 is positioned by cooperating with the clearance hole 55 through the boss 331 to maintain stable contact. The position, number and size of the clearance hole 55 are designed according to the specific structure of the hub 13, and will not be described in detail here. It should be understood that the bottom 51 of the cone 50 abuts against the base 30 and is stably positioned on the hub 13. The hub 13 can be used as a load-bearing component or not. When the hub 13 is not used as a load-bearing component, the base 30 (especially the positioning member 33) can be used as a load-bearing component. As for how the bottom 51 of the cone 50 matches the hub 13, it is common knowledge in the art and will not be described in detail.

[0040] Please continue to refer to this. Figure 5 In the above technical solution, the drive device 70 includes a pressure ring 71 and a drive unit (not shown). The pressure ring 71 includes a lower base plate 713 and an upper base plate 711. The lower base plate 713 is annular, and there is a certain distance between the lower base plate 713 and the upper base plate 711. Several support members 715 are provided between the lower base plate 713 and the upper base plate 711. It should be understood that the lower base plate 713 has a through opening 712 for the cone 50 to extend into. The distance between the lower base plate 713 and the upper base plate 711 is a clearance space. During operation, the lower base plate 713 abuts against the tire body 11. When the tire body 11 moves from the small end 57 to the large end 59, it moves relative to the cone 50 from the lower base plate 713 to the upper base plate 711. Several support members 715 are provided at intervals between the upper base plate 711 and the lower base plate 713. The drive unit is used to drive the pressure ring 71 to move up and down. Specifically, the drive unit applies external force to the upper base plate 711, but is not limited to this.

[0041] Please continue to refer to this. Figure 5In the above technical solution, the tire body 11 contains PU material. For example, if the tire body 11 is made of PU material through foaming, the elasticity and friction of the tire body 11 are improved. Furthermore, the tire body 11 includes an inner layer 111 and an outer layer 113, which are made through foaming. The inner layer 111 and the outer layer 113 can be made of different foaming materials, avoiding performance limitations caused by using the same material for the tire body 11. The density of the inner layer 111 is lower than that of the outer layer 113, giving the inner layer 111 the advantage of being lightweight. At the same time, the elasticity of the outer layer 113 can be higher than that of the inner layer 111, giving the outer layer 113 good elasticity and compressive strength to withstand the pressure experienced when using a simulated pneumatic tire, and better protecting the inner layer 111. Even further, the inner layer 111 is made of EVA foam, and the outer layer 113 is made of PU, EPO, or ETPU, but is not limited to these.

[0042] The following is combined with Figures 1-5 This application details the PU tire assembly method:

[0043] First, position the wheel hub 13 on the base 30, and insert the positioning piece 33 into the groove of the wheel hub 13 to ensure that the wheel hub 13 can be stably fixed on the base 30.

[0044] Then the tire body 11 is inserted into the cone 50 from the small end 57 side, and the bottom 51 of the cone 50 is then placed against the base 30 and stably positioned on the wheel hub 13.

[0045] Then the drive unit is activated, and the drive pressure ring 71 is pressed down until the tire body 11 moves to the large end 59 and is then fitted into the wheel hub 13, completing the assembly of the tire body 11 and the wheel hub 13.

[0046] Finally, the drive unit moves the pressure ring 71 up, removes the cone 50, and then removes the assembled PU tire 10.

[0047] Compared with the prior art, the PU tire assembly device of the present invention is suitable for assembling PU tires 10. It includes a base 30, a cone 50 and a drive device 70. In use, the wheel hub 13 is first positioned on the base 30. Then, the tire body 11 is inserted into the cone 50 through the small end 57. Next, the cone 50 is placed against the base 30 and positioned on the wheel hub 13. Then, the drive device 70 applies downward pressure to the tire body 11 so that the tire body 11 moves to the large end 59 and is inserted into the wheel hub 13, thus completing the assembly of the tire body 11 and the wheel hub 13. This avoids the problem that "PU tires 10 are strong and the mechanical claws are not easy to expand, resulting in low assembly efficiency". With the help of the base 30, cone 50 and drive device 70, PU tires 10 can be assembled quickly, efficiently and conveniently.

[0048] The above-disclosed embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the claims of the present invention are still within the scope of the present invention.

Claims

1. A PU tire assembly apparatus, suitable for assembling PU tires, said PU tire comprising a tire body and a rim, characterized in that, include: A base for positioning the wheel hub, the base including a base body and a positioning member protruding from the base body, the positioning member passing through a groove in the wheel hub. A cone-shaped tube, having a small end and a large end, is provided. The tire body is slidably fitted onto the small end of the cone, and the large end of the cone can be detachably abutted against the base. The cone includes a bottom with a clearance hole. A positioning member has a boss that mates with the clearance hole for positioning. Furthermore, the bottom of the cone abuts against the positioning member of the base. The positioning member is positioned by the boss engaging with the clearance hole, thus preventing the wheel hub from acting as a load-bearing component. A drive device is provided, wherein the cone is located between the drive device and the base, the drive device is slidably and detachably mounted on the cone, the drive device can push the tire body from the small end of the cone and slide it downward along the cone, and the tire body slides off the cone and is mounted on the wheel hub.

2. The PU tire assembly apparatus as described in claim 1, characterized in that, The positioning component is integral with the base body.

3. The PU tire assembly apparatus as described in claim 1, characterized in that, The diameter of the large end of the cone is greater than or equal to the diameter of the hub.

4. The PU tire assembly apparatus as described in claim 1, characterized in that, The cone includes a wall portion, and the bottom portion and the wall portion form a hollow cone.

5. The PU tire assembly apparatus as described in claim 1, characterized in that, The driving device includes a pressure ring, which includes a lower base plate and an upper base plate. The lower base plate is annular, and there is a certain distance between the lower base plate and the upper base plate. Several support members are provided between the lower base plate and the upper base plate.

6. The PU tire assembly apparatus as described in claim 5, characterized in that, The driving device also includes a driving unit for driving the pressure ring to move up and down.

7. A method for assembling a PU tire, comprising assembling the tire using the PU tire assembly apparatus as described in any one of claims 1-6, characterized in that, Assembly steps include: The hub is positioned on the base, and the positioning element of the base passes through the groove of the hub. The tire body is inserted into the cone through the small end of the cone; The large end of the cone abuts against the base and is located on the hub, so that the clearance hole at the bottom of the cone engages with the boss of the positioning member for positioning. Moreover, the bottom of the cone abuts against the positioning member of the base, and the positioning member is positioned by engaging with the clearance hole through the boss, so that the hub does not act as a load-bearing member. The drive device applies downward pressure to the tire body, causing the tire body to slide downward along the cone. After moving to the large end, the tire body slides away from the cone and is fitted onto the wheel hub.

8. The PU tire assembly method as described in claim 7, characterized in that, The tire body contains PU material.

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