An apparatus for riveting an axle to a plastic wheel

Abstract

The utility model discloses an equipment for riveting wheel axle in plastic wheel, including the positioning assembly, the top pressure subassembly and the drive assembly of being located on the frame, through the controllable output speed and pressure of drive assembly output, make top pressure subassembly in the riveting process with controllable speed and force and press into the assembly through -hole of plastic wheel of wheel axle, namely through accurate control riveting speed and pressure, avoid tearing of the assembly through -hole edge of plastic wheel caused by instantaneous impact or excessive pressure, thereby solve the plastic hair of traditional cylinder / hydraulic cylinder high -speed impact and produce, and the one -time pass rate of product is improved significantly, and the product quality is improved.

Description

[Technical Field]

[0001] This utility model relates to the field of bowl basket accessory assembly technology, and in particular to a device for riveting wheel axles to plastic wheels. [Background Technology]

[0002] In the automated assembly process of plastic rollers and axles in bowl baskets, traditional techniques commonly employ pneumatic riveting equipment to secure the two components. This type of equipment uses compressed air as a power source, driving the riveting joint via a cylinder to achieve rapid stamping. However, limited by the physical characteristics of pneumatic transmission, the cylinder's speed often exhibits an uncontrollable abrupt acceleration at the end of its stroke, resulting in a sudden increase in riveting impact force. When the axle is pressed into the plastic roller's axle hole at high speed, the rigid impact causes tearing stress concentration in the plastic material at the edge of the axle hole, leading to defects such as burrs and debris, like plastic roughening around the contact area between the axle and the roller. These roughenings not only affect the product's appearance but can also detach and cause mechanical jamming, becoming a key quality risk leading to functional failure.

[0003] In existing technologies, some solutions attempt to mitigate impact by adding buffer mechanisms or adjusting air pressure throttle valves. However, the power output curve of the cylinder is inherently nonlinear and abrupt, making it difficult to achieve precise gradient control of speed and force during riveting. Especially for soft plastic rollers with a Shore hardness below D70, such as POM and PA materials, the process window of traditional pneumatic equipment is extremely narrow; even slight fluctuations in parameters can lead to a surge in scrap rates. Furthermore, the pressure stability of the cylinder drive is easily affected by fluctuations in the air source pressure, further exacerbating the problem of quality consistency in mass production.

[0004] Therefore, this utility model was developed to address the aforementioned problems. [Utility Model Content]

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a device for riveting axles to plastic wheels. By using a drive component to output controllable speed and pressure, the top pressing component presses the axle into the assembly through hole of the plastic wheel at a controllable speed and force during the riveting process. In other words, by precisely controlling the riveting speed and pressure, instantaneous impact or excessive pressure is avoided to prevent tearing of the edge of the assembly through hole of the plastic wheel, thereby solving the problem of plastic burrs caused by high-speed impact of traditional cylinders / hydraulic cylinders. The first-pass yield of products is significantly improved, thus enhancing product quality.

[0006] This utility model is achieved through the following technical solution:

[0007] A device for riveting an axle to a plastic wheel includes a frame 1, a positioning component 2 for positioning the plastic wheel 100 on the frame 1, a lifting and lowering pressing component 3 on the frame 1 and above the positioning component 2, and a driving component 4 on the frame 1 for driving the pressing component 3 to move up and down accordingly to rivet the axle 200 into the mounting through hole 110 of the plastic wheel 100. The driving component 4 is configured to have controllable output speed and pressure, so that the pressing component 3 presses the axle 200 into the mounting through hole 110 of the plastic wheel 100 at a controllable speed and force during the riveting process.

[0008] As described above, in a device for riveting axles to plastic wheels, the drive assembly 4 is a drive electric cylinder.

[0009] As described above, in a device for riveting axles to plastic wheels, the pressing assembly 3 includes a pressing rod 31 connected to the output shaft of a drive cylinder for pressing the axle 200.

[0010] As described above, in a device for riveting axles to plastic wheels, the pressing assembly 3 further includes a pressing anti-rotation member 32 disposed on the side wall of the pressing rod 31. The pressing anti-rotation member 32 is configured to engage in the connecting groove 210 at the upper end of the axle 200 during the pressing process of the pressing rod 31 pressing the upper end of the axle 200 to prevent the axle 200 from rotating relative to the pressing rod 31.

[0011] As described above, in a device for riveting axles to plastic wheels, the top pressure anti-rotation member 32 and the top pressure rod 31 are integrally formed.

[0012] As described above, in a device for riveting axles to plastic wheels, a guide component is provided between the pressing assembly 3 and the frame 1 to guide the movement path of the pressing assembly 3.

[0013] As described above, in a device for riveting axles to plastic wheels, the guide assembly includes a guide hole sleeve disposed on a frame 1 and a guide rod slidably inserted within the guide hole sleeve, the guide rod being connected to a pressing assembly 3.

[0014] As described above, in a device for riveting axles to plastic wheels, the positioning assembly 2 includes a positioning seat 21 mounted on a frame 1. The positioning seat 21 is provided with a positioning block 22 for positioning and engaging with the side wall of the plastic wheel 100. The positioning seat 21 is also provided with a clearance portion 23 for clearance of the corresponding end of the axle 200.

[0015] As described above, in a device for riveting a wheel axle to a plastic wheel, the positioning block 22 is provided with a positioning recess 221 for positioning and engaging with the side of the plastic wheel 100, and the positioning recess 221 is provided with guide slopes 222 at both ends.

[0016] As described above, in a device for riveting axles to plastic wheels, the clearance portion 23 is a clearance through hole provided on the positioning seat 21 for clearance of the corresponding end of the axle 200.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. This utility model uses a drive component to output controllable speed and pressure, enabling the top pressing component to press the wheel axle into the assembly through hole of the plastic wheel at a controllable speed and force during the riveting process. In other words, by precisely controlling the riveting speed and pressure, it avoids tearing of the edge of the assembly through hole of the plastic wheel caused by instantaneous impact or excessive pressure, thereby solving the problem of plastic burrs caused by high-speed impact of traditional cylinders / hydraulic cylinders. The first-pass yield of the product is significantly improved, thus enhancing product quality.

[0019] 2. In this utility model, the controllable pressure output by the drive component ensures that the assembly through hole of the wheel axle and the plastic wheel achieves a reliable interference fit or riveting connection, avoiding failure problems such as wheel axle loosening or falling off due to insufficient pressure, and improving riveting strength and durability.

[0020] 3. This utility model integrates the positioning component, the pressing component, and the driving component onto a single frame. Through precise positioning, controllable pressure application, and automated execution, the equipment can effectively reduce the defect rate caused by human error (such as inaccurate positioning or uneven force) or fluctuations in process parameters. Long-term use can significantly reduce raw material loss and rework costs, improve production economy, and also features high integration and reduced space requirements.

[0021] 4. This utility model uses a mechanical anti-rotation structure where the top-pressing anti-rotation component is inserted into the connecting slot. This structure forces the axle to move only along the axial direction of the top-pressing rod, completely avoiding the risk of rotation and ensuring that the axle insertion direction is completely consistent with the preset axis. This significantly improves the coaxiality accuracy after riveting and provides a basic guarantee for the subsequent functionality of the axle. At the same time, by constraining the rotational freedom of the axle through the mechanical anti-rotation structure, the shear stress caused by rotation is eliminated, effectively protecting the structural integrity of the assembly through hole and reducing the scrap rate caused by torsional deformation. [Attached Image Description]

[0022] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0023] Figure 1 This is a perspective view of the present invention when it is positioned with plastic wheels.

[0024] Figure 2 This is a perspective view of the present invention.

[0025] Figure 3 This is a side view of the present invention.

[0026] Figure 4 This is a perspective view of the positioning component in this utility model.

[0027] Figure 5 This is a perspective view of the top pressure component and the drive component in this utility model.

[0028] Figure 6 This is a perspective view of the wheel axle riveted to the plastic wheel in this utility model.

[0029] Figure 7 This is a perspective view of the wheel axle and plastic wheel in this utility model when they are separated.

Detailed Implementation Methods

[0030] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0031] like Figure 1-7 As shown, this utility model discloses a device for riveting axle to a plastic wheel, comprising a frame 1, a positioning component 2 for positioning the plastic wheel 100 on the frame 1, a lifting and lowering pressing component 3 on the frame 1 and above the positioning component 2, and a driving component 4 on the frame 1 for driving the pressing component 3 to move up and down accordingly to rivet the axle 200 into the mounting through hole 110 of the plastic wheel 100. The driving component 4 is configured to have controllable output speed and pressure, so that the pressing component 3 presses the axle 200 into the mounting through hole 110 of the plastic wheel 100 at a controllable speed and force during the riveting process. This invention uses a drive component to output controllable speed and pressure, enabling the top pressing component to press the wheel axle into the assembly through hole of the plastic wheel at a controllable speed and force during the riveting process. By precisely controlling the riveting speed and pressure, it avoids tearing of the edge of the assembly through hole of the plastic wheel caused by instantaneous impact or excessive pressure, thereby solving the problem of plastic burrs caused by high-speed impact of traditional cylinders / hydraulic cylinders. This significantly improves the first-pass yield and enhances product quality.

[0032] In this invention, the controllable pressure output by the drive component ensures a reliable interference fit or riveting connection between the axle and the plastic wheel through the assembly hole, avoiding failures such as axle loosening or falling off due to insufficient pressure, and improving riveting strength and durability.

[0033] This invention integrates the positioning component, the pressing component, and the driving component onto a single frame. Through precise positioning, controllable pressure application, and automated execution, the equipment can effectively reduce the defect rate caused by human error (such as inaccurate positioning or uneven force) or fluctuations in process parameters. Long-term use can significantly reduce raw material loss and rework costs, improve production economy, and also features high integration and reduced space requirements.

[0034] Preferably, the drive component 4 is a drive electric cylinder, which features high-precision control, strong process adaptability, high reliability, automation friendliness, and environmental adaptability. This drive electric cylinder can be a Lianhua HEB125 series servo electric cylinder, such as the HEB125-50-D / P or HEB125-2000-D / P model.

[0035] like Figure 1-3 As shown in Figures 5-7, the pressing assembly 3 includes a pressing rod 31 connected to the output shaft of the drive cylinder for pressing the wheel axle 200. The pressing assembly 3 also includes a pressing anti-rotation member 32 disposed on the side wall of the pressing rod 31. The pressing anti-rotation member 32 is configured to engage with the connecting groove 210 at the upper end of the wheel axle 200 during the pressing process of the pressing rod 31 pressing the upper end of the wheel axle 200, thereby preventing the wheel axle 200 from rotating relative to the pressing rod 31. This embodiment, through the mechanical anti-rotation structure of the pressing anti-rotation member engaging with the connecting groove, forces the wheel axle to move only along the axial direction of the pressing rod, completely avoiding the risk of rotation, ensuring that the wheel axle insertion direction is completely consistent with the preset axis, significantly improving the coaxiality accuracy after riveting, and providing a fundamental guarantee for the subsequent functionality of the wheel axle; at the same time, by constraining the rotational freedom of the wheel axle through the mechanical anti-rotation structure, it eliminates the shear stress caused by rotation, effectively protecting the structural integrity around the assembly through hole, and reducing the scrap rate caused by torsional deformation.

[0036] like Figure 5 As shown, the top-pressing anti-rotation component 32 and the top-pressing rod 31 are integrally formed, which can effectively eliminate the hidden danger of "dynamic relative movement" of separate components and ensure the certainty of the riveting process. During top pressing, the pressure of the drive component is directly transmitted to the top-pressing anti-rotation component through the top-pressing rod, and then evenly applied to the connecting groove to ensure that the pressure is fully used for axial pressing of the wheel axle.

[0037] A guide assembly is provided between the pressing assembly 3 and the frame 1 to guide the movement path of the pressing assembly 3. The guide assembly includes a guide hole sleeve on the frame 1 and a guide rod slidably inserted in the guide hole sleeve. The guide rod is connected to the pressing assembly 3 (not shown in the figure). By forming a rigid sliding between the guide hole sleeve and the guide rod, the lifting path of the pressing assembly 3 is linearly constrained, effectively suppressing lateral swaying caused by uneven output force of the drive assembly 4 or uneven force on the wheel axle 200, ensuring that the wheel axle 200 is always pressed perpendicularly along the axis of the mounting through hole 110, significantly improving the coaxiality and dimensional consistency of the riveting. In addition, the guide assembly also shares the radial component of the force borne by the pressing rod 31, and the drive cylinder mainly bears the pure axial load, reducing the wear of precision transmission components such as lead screws and bearings, reducing maintenance frequency, and extending the service life of the entire equipment.

[0038] like Figure 4As shown, in order to ensure accurate and reliable positioning and improve subsequent riveting quality and production efficiency, the positioning component 2 includes a positioning seat 21 on the frame 1. The positioning seat 21 is provided with a positioning block 22 for positioning and cooperating with the side wall of the plastic wheel 100. The positioning seat 21 is provided with a clearance part 23 for avoiding the corresponding end of the wheel axle 200.

[0039] like Figure 4 As shown, the positioning block 22 has a positioning recess 221 for positioning and engaging with the side of the plastic wheel 100, and guide slopes 222 are provided at both ends of the positioning recess 221. This embodiment achieves high-precision positioning through the "shape matching + surface contact" design between the positioning recess 221 and the side wall of the plastic wheel; the guide slopes 222, being "sloping guide structures," directly solve the problem of "difficult installation and alignment" of the plastic wheel, facilitating installation and alignment and reducing the difficulty of manual operation.

[0040] like Figure 4 As shown, in order to avoid interference between the wheel axle and the positioning seat and to ensure smooth pressing process, the avoidance part 23 is an avoidance through hole provided on the positioning seat 21 to avoid the corresponding end of the wheel axle 200.

Claims

1. A device for riveting an axle to a plastic wheel, characterized in that... The device includes a frame (1), on which a positioning component (2) for positioning a plastic wheel (100) is provided. A lifting and lowering pressing component (3) is provided on the frame (1) and above the positioning component (2). A driving component (4) is provided on the frame (1) for driving the pressing component (3) to move up and down accordingly to rivet the wheel axle (200) into the mounting through hole (110) of the plastic wheel (100). The driving component (4) is configured to have controllable output speed and pressure, so that the pressing component (3) presses the wheel axle (200) into the mounting through hole (110) of the plastic wheel (100) at a controllable speed and force during the riveting process.

2. The device for riveting axles to plastic wheels according to claim 1, characterized in that... The drive component (4) is a drive electric cylinder.

3. The device for riveting axles to plastic wheels according to claim 2, characterized in that... The top-pressing assembly (3) includes a top-pressing rod (31) connected to the output shaft of the drive electric cylinder for use with the top-pressing wheel axle (200).

4. The device for riveting axles to plastic wheels according to claim 3, characterized in that... The top-pressing assembly (3) further includes a top-pressing anti-rotation member (32) provided on the side wall of the top-pressing rod (31). The top-pressing anti-rotation member (32) is configured to engage in the connecting groove (210) at the upper end of the wheel axle (200) during the process of the top-pressing rod (31) pressing the upper end of the wheel axle (200) to prevent the wheel axle (200) from rotating relative to the top-pressing rod (31).

5. The device for riveting an axle to a plastic wheel according to claim 4, characterized in that... The top pressure anti-rotation component (32) and the top pressure rod (31) are integrally formed.

6. The device for riveting axles to plastic wheels according to claim 1, characterized in that... A guide component is provided between the top pressing assembly (3) and the frame (1) to guide the movement path of the top pressing assembly (3).

7. The device for riveting axles to plastic wheels according to claim 6, characterized in that... The guide assembly includes a guide hole sleeve disposed on the frame (1) and a guide rod slidably inserted in the guide hole sleeve, the guide rod being connected to the top pressing assembly (3).

8. The device for riveting an axle to a plastic wheel according to any one of claims 1-7, characterized in that... The positioning component (2) includes a positioning seat (21) mounted on the frame (1), the positioning seat (21) being provided with a positioning block (22) for positioning and engaging with the side wall of the plastic wheel (100), and the positioning seat (21) being provided with a clearance part (23) for clearance of the corresponding end of the wheel axle (200).

9. The device for riveting axles to plastic wheels according to claim 8, characterized in that... The positioning block (22) has a positioning recess (221) for positioning and engaging with the side of the plastic wheel (100), and the positioning recess (221) has guide slopes (222) at both ends.

10. The device for riveting axles to plastic wheels according to claim 8, characterized in that... The avoidance part (23) is an avoidance through hole provided on the positioning seat (21) for avoiding the corresponding end of the wheel axle (200).

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