Mechanical arm of a slag skimming device
Patent Information
- Application Number
- CN202522153288.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-11
- Publication Date
- 2026-09-11
- Estimated Expiration
- 2035-10-11
AI Technical Summary
高温失效问题：齿轮啮合面易因热膨胀导致齿隙变化，润滑油碳化加剧磨损，液压系统密封件在高温下易失效，造成漏油和动作迟滞；
[0007]本技术方案的有益效果：一种扒渣装置的机械臂在使用时，驱动机构正转时带动主动链轮正转，带动链条向前移动，链条的后端带动长臂体向前移动，反之，驱动机构反转时，带动链条向后移动，链条的前端带动长臂体向后移动。本申请由于采用以上结构，首先，链条为非连续式结构，而是一节一节组装结构，其连接节点处存在断开的间隙，使得热传导过程也会中断，使其相对于传统齿条结构的传热效率很低，另外，链条与长臂体之间也只是间歇式接触，也是存在间隙的，使热传导对链条的影响大幅缩减，进而确保链条传递给后端的热量很少，而对于链条本身，其各节之间存在间隙，即使存在少量热膨胀也不会对精度影响太大，加上链条与链轮的配合本身并非高精度配合关系，因此可以承受高热量所带来的膨胀偏差，其次，链条与链轮之间配合时也只有很小的接触面积，加上两者之间的间隙，使得热量从链条传递给链轮的量很少，因此热量对链轮的影响也很小。因此，相对于现有技术，本申请的方案不仅成本较低、传热效率低、承热能力强、抗变形能力强，而且其本身不易损坏，无需润滑维护，拆装也很方便。
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Figure CN224744070U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a robotic arm for a slag removal device. Background Technology
[0002] In traditional aluminum processing and smelting processes, manual slag removal is generally used. However, due to the high temperature and heat environment in front of the aluminum melting furnace door, accompanied by harmful gases, the overall working environment is harsh and exceeds the range that workers can withstand. Therefore, in recent years, it has become increasingly difficult to find workers. The slag removal machines on the market generally include a moving mechanism, which is equipped with a robotic arm. The robotic arm can tilt up and down, move axially, and rotate horizontally.
[0003] Traditional muck-removing equipment typically uses gear transmission, hydraulic drive, or crank-connecting rod mechanisms to achieve axial displacement of the robotic arm. However, in high-temperature environments, traditional transmission mechanisms face the following technical bottlenecks: High-temperature failure issues: Gear meshing surfaces are prone to backlash changes due to thermal expansion, lubricating oil carbonization exacerbates wear, and hydraulic system seals are prone to failure at high temperatures, resulting in oil leaks and sluggish operation; High maintenance costs: The need to frequently replace high-temperature bearings and seals leads to extended downtime and affects production efficiency.
[0004] To address the aforementioned shortcomings, existing technologies attempt to reduce the impact of high temperatures through external power drives (such as crank-connecting rod mechanisms), but such solutions suffer from problems such as limited stroke of the slag removal arm and poor coordination of multi-degree-of-freedom motion. Utility Model Content
[0005] The purpose of this utility model is to provide a mechanical arm for a slag removal device, which achieves high temperature resistance, low cost, and stable and reliable transmission through a specially arranged sprocket and chain mechanism.
[0006] The technical solution of this utility model is as follows: A robotic arm for a slag removal device includes: Mounting rack; The long arm moves axially along the mounting frame and is assembled onto the mounting frame; The drive mechanism, mounted on a mounting bracket, includes an output shaft; The transmission mechanism includes a drive sprocket, driven sprockets symmetrically arranged on both sides of the drive sprocket, and a chain. The drive sprocket is mounted on the output shaft to rotate with the output shaft. The driven sprockets are mounted on the mounting bracket. The two ends of the chain are connected to the two ends of the long arm body respectively. The chain fits against the upper surface of the long arm body and extends along its length. The chain passes around the drive sprocket and is driven by the drive sprocket. The lower end of the driven sprocket meshes with the chain to guide the chain, so that the chain fits against the upper surface of the long arm body.
[0007] The beneficial effects of this technical solution are as follows: When the mechanical arm of a slag removal device is in use, the drive mechanism rotates forward, causing the active sprocket to rotate forward, which in turn causes the chain to move forward. The rear end of the chain causes the long arm to move forward. Conversely, when the drive mechanism rotates in reverse, it causes the chain to move backward, and the front end of the chain causes the long arm to move backward. Because this application employs the above structure, firstly, the chain is a discontinuous structure, but rather an assembled structure of individual links. The gaps at the connection points interrupt the heat conduction process, resulting in significantly lower heat transfer efficiency compared to traditional rack and pinion structures. Secondly, the contact between the chain and the long arm is intermittent, also with gaps, further reducing the impact of heat conduction on the chain and ensuring minimal heat transfer to the rear end. Furthermore, the gaps between the chain links mean that even slight thermal expansion will not significantly affect accuracy. Additionally, the chain-sprocket fit is not a high-precision fit, allowing it to withstand expansion deviations caused by high heat. Thirdly, the small contact area between the chain and sprocket, combined with the gaps between them, minimizes the amount of heat transferred from the chain to the sprocket, thus having a minimal impact on the sprocket. Therefore, compared to existing technologies, this application's solution not only has lower cost, lower heat transfer efficiency, stronger heat resistance, and stronger deformation resistance, but it is also less prone to damage, requires no lubrication or maintenance, and is easy to assemble and disassemble.
[0008] Based on the above solution, further improvements are made as follows: an upper guide roller and a lower guide roller are installed on the mounting frame. The upper guide roller engages with the upper surface of the long arm body in a guiding rolling fit, and the lower guide roller engages with the lower surface of the long arm body in a guiding rolling fit. The arrangement of the upper and lower guide rollers changes the sliding friction between the long arm body and the mounting frame to rolling friction, thereby significantly reducing friction and adapting to the sprocket and chain transmission structure of this application, thus reducing drive energy consumption.
[0009] Based on the above scheme, further improvements are made as follows: The upper surface of the long arm is provided with guide rails extending along its length. Two guide rails are symmetrically arranged along the width direction of the long arm. The upper surfaces of the guide rails roll in cooperation with the upper guide roller. A chain groove is formed between the two guide rails to accommodate the chain. The depth of the chain groove is greater than the thickness of the chain. The driven sprocket extends into the chain groove. The design of the guide rails and the chain groove they form not only ensures smooth guidance of the upper part of the long arm but also meets the chain drive requirements, ensuring that the guiding and transmission structures do not interfere with each other and are mutually integrated. The guide rails can also serve as a guiding structure for the chain, thereby protecting the chain and ensuring that it moves only along a predetermined path.
[0010] Based on the above scheme, further improvements are made as follows: there are at least two upper guide rollers, which are symmetrically arranged along the length of the mounting frame.
[0011] Based on the above scheme, further improvements are made as follows: there are at least two lower guide rollers, which are symmetrically arranged along the length of the mounting frame.
[0012] Based on the above scheme, the following improvements are made: annular baffles are provided on both sides of the upper guide roller along the axial direction, and the inner side of the annular baffles contacts the outer side of the guide rail on the same side to guide the long arm body in its width direction.
[0013] Based on the above scheme, the following improvements are made: annular bosses are provided on both sides of the lower guide roller along the axial direction, and the inner side of the annular bosses contacts the outer side of the long arm body on the same side, so as to guide the long arm body in its width direction. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of a mechanical arm of a slag-removing device according to Embodiment 1 of the present invention; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 for Figure 1 Sectional view at point BB; Figure 4 This is a cross-sectional view of the upper and lower guide rollers in another embodiment; In the diagram: 1-Mobile platform, 2-Rotation mechanism, 3-Pitching mechanism, 4-Mounting frame, 5-Long arm body, 51-Guide rail, 52-Chain groove, 6-Drive mechanism, 7-Transmission mechanism, 71-Drive sprocket, 72-Driven sprocket, 73-Chain, 8-Upper guide roller, 81-Annular stop, 9-Lower guide roller, 91-Annular boss. Detailed Implementation
[0015] 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 only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0016] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0017] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0018] The features and performance of this utility model will be further described in detail below with reference to the embodiments.
[0019] A specific embodiment of the robotic arm of the slag-removing device of this utility model: as follows Figure 1-3 As shown, a slag removal device includes a mobile platform 1, a rotating mechanism 2, a pitching mechanism 3, a mounting frame 4, a long arm body 5, a drive mechanism 6, a transmission mechanism 7, an upper guide roller 8, and a lower guide roller 9.
[0020] Mounting bracket 4 is a rectangular sleeve structure, with its lower end connected to the rotation mechanism 2 and the pitch mechanism 3 respectively.
[0021] The long arm 5 is axially movable and mounted on the mounting frame 4; the drive mechanism 6 is mounted on the mounting frame 4 and includes an output shaft; the transmission mechanism 7 includes a drive sprocket 71, driven sprockets 72 symmetrically arranged on both sides of the drive sprocket 71, and a chain 73. The drive sprocket 71 is mounted on the output shaft so that it rotates with the output shaft. The driven sprocket 72 is rotated and mounted on the mounting frame 4. The two ends of the chain 73 are respectively connected to the two ends of the long arm 5. The chain 73 is attached to the upper surface of the long arm 5 and extends along its length. The chain 73 passes around the drive sprocket 71 and is driven by the drive sprocket 71. The lower end of the driven sprocket 72 meshes with the chain 73 to guide the chain 73, so that the chain 73 is attached to the upper surface of the long arm 5.
[0022] The mounting bracket 4 is equipped with an upper guide roller 8 and a lower guide roller 9. The upper guide roller 8 engages with the upper surface of the long arm body 5 in a guiding rolling engagement, and the lower guide roller 9 engages with the lower surface of the long arm body 5 in a guiding rolling engagement. The arrangement of the upper guide roller 8 and the lower guide roller 9 changes the sliding friction between the long arm body 5 and the mounting bracket 4 to rolling friction, thereby significantly reducing the friction force and adapting to the transmission structure of the sprocket and chain 73 of this application, thus reducing drive energy consumption.
[0023] The upper surface of the long arm body 5 is provided with guide rails 51 extending along its length. Two guide rails 51 are symmetrically arranged along the width direction of the long arm body 5. The upper surface of the guide rails 51 rolls in cooperation with the upper guide rollers 8. The two guide rails 51 form a chain groove 52 for accommodating the chain 73. The depth of the chain groove 52 is greater than the thickness of the chain 73. The driven sprocket 72 extends into the chain groove 52. The design of the guide rails 51 and the chain groove 52 they form not only ensures that the upper part of the long arm body 5 can be smoothly guided, but also meets the driving requirements of the chain 73, so that the guiding and transmission structures do not interfere with each other and are integrated with each other. The guide rails 51 can also serve as a guiding structure for the chain 73, thereby protecting the chain 73 and ensuring that the chain 73 moves only along a set path. There are at least two upper guide rollers 8, symmetrically arranged along the length direction of the mounting frame 4. There are at least two lower guide rollers 9, symmetrically arranged along the length direction of the mounting frame 4. The upper guide roller 8 has annular stops 81 on both sides of its axial direction. The inner side of the annular stops 81 contacts the outer side of the guide rail 51 on the same side to guide the long arm 5 in its width direction. The lower guide roller 9 has annular bosses 91 on both sides of its axial direction. The inner side of the annular bosses 91 contacts the outer side of the long arm 5 on the same side to guide the long arm 5 in its width direction.
[0024] When the mechanical arm of a slag removal device is in use, the drive mechanism 6 rotates forward, driving the drive sprocket 71 to rotate forward, which in turn drives the chain 73 to move forward. The rear end of the chain 73 drives the long arm body 5 to move forward. Conversely, when the drive mechanism 6 rotates in reverse, it drives the chain 73 to move backward, and the front end of the chain 73 drives the long arm body 5 to move backward. Because this application employs the above structure, firstly, the chain 73 is a discontinuous structure, but rather an assembled structure of individual links. The gaps at the connection points interrupt the heat conduction process, resulting in significantly lower heat transfer efficiency compared to traditional rack and pinion structures. Secondly, the contact between the chain 73 and the long arm 5 is intermittent, also with gaps, further reducing the impact of heat conduction on the chain 73. This ensures that very little heat is transferred from the chain 73 to the rear end. Furthermore, the gaps between the links of the chain 73 mean that even slight thermal expansion will not significantly affect accuracy. Additionally, the fit between the chain 73 and the sprocket is not a high-precision fit, thus it can withstand expansion deviations caused by high heat. Thirdly, the contact area between the chain 73 and the sprocket is very small, and the gaps between them further minimize the amount of heat transferred from the chain 73 to the sprocket, thus having a minimal impact on the sprocket. Therefore, compared to existing technologies, this application's solution not only has lower cost, lower heat transfer efficiency, stronger heat resistance, and stronger deformation resistance, but it is also less prone to damage, requires no lubrication or maintenance, and is easy to assemble and disassemble.
[0025] In other embodiments, such as Figure 4As shown, the difference from Embodiment 1 is that the structure of the mounting frame 4 is two parallel steel plates. The upper guide roller 8 and the lower guide roller 9 are directly rotated and assembled between the two steel plates. The annular bosses 91 are no longer provided on both sides of the lower guide roller 9. The long arm body 5 is guided only by the annular baffles 81 of the upper guide roller 8.
[0026] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.
Claims
1. A robotic arm for a slag removal device, comprising: Mounting rack; The long arm moves axially along the mounting frame and is assembled onto the mounting frame; The drive mechanism, mounted on a mounting bracket, includes an output shaft; Its characteristic is that it further includes: The transmission mechanism includes a drive sprocket, driven sprockets symmetrically arranged on both sides of the drive sprocket, and a chain. The drive sprocket is mounted on the output shaft to rotate with the output shaft. The driven sprockets are mounted on the mounting bracket. The two ends of the chain are connected to the two ends of the long arm body respectively. The chain fits against the upper surface of the long arm body and extends along its length. The chain passes around the drive sprocket and is driven by the drive sprocket. The lower end of the driven sprocket meshes with the chain to guide the chain, so that the chain fits against the upper surface of the long arm body.
2. A mechanical arm of a slag skimming device according to claim 1, characterized in that The mounting bracket is equipped with an upper guide roller and a lower guide roller. The upper guide roller is in a guide rolling engagement with the upper surface of the long arm, and the lower guide roller is in a guide rolling engagement with the lower surface of the long arm.
3. A mechanical arm of a slag skimming device according to claim 2, characterized in that The upper surface of the long arm is provided with guide rails extending along its length direction. Two guide rails are symmetrically arranged along the width direction of the long arm. The upper surface of the guide rails rolls in cooperation with the upper guide roller. The two guide rails form a chain groove for accommodating the chain. The depth of the chain groove is greater than the thickness of the chain. The driven sprocket extends into the chain groove.
4. The robotic arm of the slag removal device according to claim 2, characterized in that, There are at least two upper guide rollers, arranged symmetrically along the length of the mounting frame.
5. A mechanical arm of a slag skimming device according to claim 2, characterized in that There are at least two lower guide rollers, arranged symmetrically along the length of the mounting frame.
6. A mechanical arm of a slag skimming device according to claim 3, characterized in that Annular baffles are provided on both sides of the upper guide roller along the axial direction. The inner side of the annular baffles contacts the outer side of the guide rail on the same side to guide the long arm body in its width direction.
7. A mechanical arm of a slag skimming device according to claim 2, characterized in that The lower guide roller is provided with annular bosses on both sides of the axial direction. The inner side of the annular bosses contacts the outer side of the long arm body on the same side to guide the long arm body in its width direction.