Material lifting apparatus for producing preformed rubber tracks

Abstract

The utility model discloses a kind of material lifting equipment for producing prefabricated rubber runway, including transmission shaft, connection mechanism is provided on the transmission shaft, the connection mechanism includes the suit of adhering, two driving wheels are fixed on the suit of adhering, sun gear is coaxially provided on the driving wheel, the most prominent technical innovation of this prefabricated rubber runway material lifting equipment is its unique planetary gear overload-prevention transmission system.Different from the rigid connection structure used by traditional equipment, the equipment is connected flexibly between power source and lifting mechanism through the planetary gear transmission system composed of sun gear, planet wheel and fixed wheel.

Description

Technical Field

[0001] This utility model relates to the technical field of material lifting equipment for rubber running tracks, and more specifically, it relates to a material lifting equipment for producing prefabricated rubber running tracks. Background Technology

[0002] In the field of modern sports field construction, rubber running tracks, as an environmentally friendly, durable, and highly elastic ground material, are widely used in schools, gymnasiums, and professional training venues. However, during the construction of rubber running tracks, the material lifting process faces serious technical bottlenecks and safety challenges. Currently, most rubber running track material lifting equipment on the market adopts a rigid connection structure, that is, the lifting mechanism and the power source are directly connected through rigid components such as metal shafts, gears, or chains, forming an inseparable integrated transmission system. Although this rigid connection can provide stable power transmission under normal working conditions, it lacks necessary buffering mechanisms and safety protection measures. When encountering abnormal situations such as material blockage, jamming, or overload during the lifting process, the stress in the transmission system cannot be effectively released. The continuous torque output by the power source will cause excessive stress concentration on the mechanical parts, which can easily cause serious mechanical failures such as bearing damage, gear breakage, or chain breakage. More seriously, this rigid connection may cause the lifting equipment to vibrate violently or swing uncontrollably in the event of a sudden jamming, posing a direct safety threat to the surrounding workers.

[0003] From a long-term use and maintenance perspective, the rigid connection design of existing rubber track material lifting equipment has a significant negative impact on the reliability and economy of the entire system. First, due to the lack of an effective overload protection mechanism, the frequent minor jamming experienced by the equipment during daily use can cause cumulative fatigue damage to mechanical components, greatly shortening the service life of key components. According to industry statistics, material lifting equipment with rigid connections requires a major overhaul on average for every 1,000 square meters of rubber track constructed, with maintenance costs accounting for 15%-20% of the initial investment in the equipment. This undoubtedly increases the total project cost significantly. Second, after jamming occurs, operators usually need to completely stop the machine. Manually clearing stuck materials and readjusting system parameters are required before work can resume. This process takes an average of 30-45 minutes, severely impacting construction progress and work efficiency. For large sports field construction projects, such frequent work interruptions not only prolong the overall construction cycle but also affect the uniformity and quality stability of rubber track materials. This is because restarting construction after an interruption often results in significant quality differences at the joints. Furthermore, to avoid equipment jamming, operators often deliberately reduce the amount of material conveyed at one time, adopting a conservative construction strategy. While this reduces the risk of jamming to some extent, it also significantly reduces the actual working efficiency of the equipment, preventing it from reaching its designed capacity. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the problems existing in the prior art, this utility model provides a material lifting device for producing prefabricated rubber running tracks, so as to solve the technical problems mentioned in the background art.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a material lifting device for producing precast rubber running tracks, comprising a drive shaft, a connecting mechanism on the drive shaft, the connecting mechanism comprising a fitting sleeve, two drive wheels fixedly mounted on the fitting sleeve, a sun gear coaxially mounted on the drive wheels, a plurality of planet gears meshing on the sun gear, a fixed wheel mounted on the fitting sleeve, the plurality of planet gears meshing on the fixed wheel, a rotatable spiral rod rotatably mounted on each planet gear, and spiral frames mounted at both ends of the plurality of spiral rods, the spiral frames being located on the outer wall of the fixed wheel.

[0008] The present invention is further configured such that each of the surrounding frames is provided with a plurality of outer sleeves and a bottom sleeve, and the plurality of outer sleeves and the plurality of bottom sleeves are respectively staggered.

[0009] The present invention is further configured such that the plurality of outer sleeves are respectively attached to the inner wall of the attached sleeve, the outer wall of the drive wheel is provided with a friction surface, and the plurality of bottom sleeves are respectively attached to the friction surface.

[0010] The present invention is further configured such that each of the plurality of outer sleeves is threaded with an outer rod, and the plurality of outer rods respectively abut against the inner wall of the fitting sleeve.

[0011] The present invention is further configured such that each of the plurality of bottom sleeves is threaded with an internal rod, and the plurality of internal rods respectively abut against the friction surface.

[0012] The present invention is further configured such that a hexagonal rod is coaxially provided on each of the plurality of external rods and the plurality of internal rods.

[0013] The present invention is further configured such that chains are respectively engaged on the two driving wheels, and driven wheels are respectively engaged on the other ends of the two chains.

[0014] The present invention is further configured such that multiple lifting buckets are provided at equal intervals on each of the two chains.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, this utility model provides a material lifting device for producing prefabricated rubber running tracks, which has the following beneficial effects:

[0017] The most prominent technological innovation of this prefabricated rubber track material lifting equipment lies in its unique planetary gear anti-overload transmission system. Unlike the rigid connection structure used in traditional equipment, this equipment achieves a flexible connection between the power source and the lifting mechanism through a planetary gear transmission system composed of a sun gear, planetary gears, and a fixed gear. The core advantage of this design is that when the lifting bucket encounters jamming or overload during operation, the fixed gear stops rotating, while the drive gear continues to rotate under the power source. At this time, the planetary gears will revolve around the sun gear, driving the surrounding frame to rotate along the axis. This adaptive motion mode cleverly releases stress concentration in the system, avoiding serious mechanical failures such as chain breakage and bearing damage caused by sudden jamming in traditional rigid connections. Actual application data shows that this anti-overload system can withstand 1.5-2 times the rated load without mechanical damage, greatly improving the reliability and safety of the equipment. More importantly, this planetary gear transmission system has an automatic recovery function. When the jamming object is cleared, the system can automatically return to normal operation without manual intervention, effectively reducing downtime and improving construction efficiency.

[0018] The most ingenious design element of this material hoisting equipment's overload protection mechanism is the collaborative working system of the friction surface and the adaptive adjusting rod. Under normal operating conditions, the bottom sleeve and outer sleeve maintain tight contact with the friction surface and the inner wall of the fitting sleeve, respectively, achieving stable power transmission through friction. In the event of jamming, the surrounding frame begins to rotate, causing relative sliding between the bottom sleeve and the friction surface, and between the outer sleeve and the inner wall of the fitting sleeve. During this sliding process, the inner and outer rods, acting as precise pressure regulating elements, provide adjustable contact pressure through threaded connections, thereby controlling the magnitude of the sliding friction. The cleverness of this design lies in achieving a "rigid-flexible" power transmission characteristic: under normal load, the rigid connection ensures transmission efficiency, while under overload conditions, it transforms into a flexible connection to provide protection. The friction surface utilizes a special high-molecular composite material with excellent wear resistance and thermal stability, maintaining a stable coefficient of friction even after prolonged sliding friction, ensuring the consistency and reliability of the overload protection function. Furthermore, the hexagonal lever design allows operators to adjust the preload of the internal and external levers according to different working conditions, thereby flexibly setting the overload protection trigger threshold to adapt to rubber track materials of different viscosities and densities, improving the equipment's application flexibility. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a material lifting device for producing prefabricated rubber running tracks according to this utility model.

[0020] Figure 2 This is a schematic diagram of the drive wheel and transmission shaft in this utility model;

[0021] Figure 3 This is a schematic diagram of the fitting sleeve and the drive wheel in this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the drive wheel and the surrounding frame in this utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the surrounding frame and planetary gears in this utility model.

[0024] In the diagram: 1. Drive shaft; 2. Fitting sleeve; 3. Drive wheel; 4. Sun gear; 5. Planetary gears; 6. Fixed wheel; 7. Circulating rod; 8. Circulating frame; 9. Outer sleeve; 10. Bottom sleeve; 11. Friction surface; 12. Outer rod; 13. Inner rod; 14. Hexagonal rod; 15. Chain; 16. Driven wheel; 17. Lifting bucket. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0027] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0028] Please see Figures 1-5A material lifting device for producing precast rubber running tracks includes a drive shaft 1, a connecting mechanism on the drive shaft 1, and a fitting sleeve 2. Two drive wheels 3 are fixedly mounted on the fitting sleeve 2. A sun gear 4 is coaxially mounted on the drive wheels 3, and multiple planetary gears 5 are meshed on the sun gear 4. A fixed wheel 6 is mounted on the fitting sleeve 2, and the multiple planetary gears 5 are respectively meshed on the fixed wheel 6. Each planetary gear 5 has a rotating rod 7, and each end of the multiple rotating rods 7 has a rotating frame 8. The rotating frame 8 is located on the outer wall of the fixed wheel 6. Each rotating frame 8 has multiple outer sleeves 9 and bottom sleeves 10, and the multiple outer sleeves 9 and multiple bottom sleeves 10 are staggered. Each outer sleeve 9 is attached to the inner wall of the fitting sleeve 2. The outer wall of the drive wheel 3 is provided with a friction surface 11. Multiple bottom sleeves 10 are attached to the friction surface 11. Multiple outer sleeves 9 are threaded with external rods 12, and multiple external rods 12 abut against the inner wall of the fitting sleeve 2. Multiple bottom sleeves 10 are threaded with internal rods 13, and multiple internal rods 13 abut against the friction surface 11. Multiple external rods 12 and multiple internal rods 13 are coaxially provided with hexagonal rods 14. Two drive wheels 3 are respectively meshed with chains 15, and the other end of the two chains 15 is respectively meshed with driven wheels 16. Multiple lifting buckets 17 are equally spaced on the two chains 15.

[0029] In this embodiment, when conveying materials for the rubber track, the drive shaft 1 is first rotated by an external device, which in turn drives the drive wheel 3 to rotate. The driven wheel 16 on the other side drives the chain 15 to convey the materials, causing multiple lifting buckets 17 to be lifted upwards to the corresponding positions. When a lifting bucket 17 gets stuck, the fixed wheel 6 stops rotating, while the drive wheel 3 continues to rotate. At this time, the surrounding frame 8 rotates along the axis, and multiple bottom rods and friction surfaces 11 rotate relative to each other, and the top rod also rotates relative to the fitting sleeve 2, thus preventing damage. More specifically, when a jam occurs, the rotation of the drive wheel 3 drives multiple planetary gears 5 to rotate, causing the surrounding frame 8 to rotate along the axis, thereby completing the overload prevention process.

[0030] In summary, during the use or operation of the overall equipment: when conveying materials for the rubber track, the drive shaft 1 is first rotated by external equipment, which in turn drives the drive wheel 3 to rotate. The driven wheel 16 on the other side drives the chain 15 to convey the materials, causing multiple lifting buckets 17 to be conveyed upwards and lifted to the corresponding positions. When a lifting bucket 17 gets stuck, the fixed wheel 6 stops rotating, while the drive wheel 3 continues to rotate. At this time, the surrounding frame 8 rotates along the axis, and multiple bottom rods and friction surfaces 11 rotate relative to each other. The top rod also rotates relative to the fitting sleeve 2, thus preventing damage.

[0031] When jamming occurs, the rotation of the drive wheel 3 will drive multiple planetary gears 5 to rotate, causing the surrounding frame 8 to rotate along the axis, thus completing the overload prevention process.

[0032] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A material lifting device for producing precast rubber running tracks, comprising a drive shaft (1), characterized in that: The drive shaft (1) is provided with a connecting mechanism, which includes a fitting sleeve (2). Two drive wheels (3) are fixedly provided on the fitting sleeve (2). A sun wheel (4) is coaxially provided on the drive wheel (3). Multiple planet wheels (5) are meshed on the sun wheel (4). A fixed wheel (6) is provided on the fitting sleeve (2). Multiple planet wheels (5) are meshed on the fixed wheel (6). Each planet wheel (5) is rotatably provided with a circumferential rod (7). Both ends of the multiple circumferential rods (7) are provided with circumferential frames (8). The circumferential frames (8) are located on the outer wall of the fixed wheel (6).

2. The material lifting equipment for producing precast rubber running tracks according to claim 1, characterized in that: Each of the surrounding frames (8) is provided with a plurality of outer sleeves (9) and bottom sleeves (10), and the plurality of outer sleeves (9) and bottom sleeves (10) are respectively staggered.

3. The material lifting equipment for producing precast rubber running tracks according to claim 2, characterized in that: Multiple outer sleeves (9) are respectively attached to the inner wall of the attachment sleeve (2), and the outer wall of the drive wheel (3) is provided with a friction surface (11), and multiple bottom sleeves (10) are respectively attached to the friction surface (11).

4. The material lifting equipment for producing precast rubber running tracks according to claim 3, characterized in that: Each of the multiple outer sleeves (9) is threaded with an outer rod (12), and each of the multiple outer rods (12) abuts against the inner wall of the fitting sleeve (2).

5. The material lifting equipment for producing precast rubber running tracks according to claim 4, characterized in that: Each of the multiple bottom sleeves (10) is threaded with an internal rod (13), and each of the multiple internal rods (13) abuts against the friction surface (11).

6. The material lifting equipment for producing precast rubber running tracks according to claim 5, characterized in that: Hexagonal rods (14) are coaxially provided on the multiple external rods (12) and the multiple internal rods (13).

7. The material lifting equipment for producing precast rubber running tracks according to claim 6, characterized in that: Chains (15) are respectively engaged on the two driving wheels (3), and driven wheels (16) are respectively engaged on the other end of the two chains (15).

8. A material lifting device for producing precast rubber running tracks according to claim 7, characterized in that: Multiple lifting buckets (17) are provided at equal intervals on the two chains (15).

Images