Single cavity double layer slewing bearing type floor grinder gear box

Abstract

The utility model provides a single cavity double -deck slewing bearing type terrace grinder gear box, it is by gear box body, box body upper cover and motor flange disc constitutes, and the motor flange disc is connected with the central gear shaft perpendicular in the gear box body through the slewing support subassembly containing outer gear ring, inner race, is equipped with the baffle in the gear box body, and the baffle divides the box body and is separated as grinding revolution transmission chamber and grinding rotation transmission chamber, and the periphery has lubricating oil gap part intercommunication two chambers, in the grinding revolution transmission chamber, two revolution pinions are engaged with outer gear ring, are installed through revolution pinion shaft, in the grinding rotation transmission chamber, there is revolution synchronous gear wheel on revolution pinion shaft, and there is intermediate gear shaft between the box body and baffle, and the intermediate gear on it is engaged with revolution synchronous gear wheel, and both are connected transmission mechanism of driving abrasive head rotation respectively. In addition, the box body upper cover and motor flange disc, inner race and central gear shaft between are equipped with sealing component. This design cleverly combines abrasive head rotation and revolution movement, guarantees grinding fineness and efficiency, and good sealing property ensures the long -term stable operation of equipment.

Description

Technical Field

[0001] This utility model belongs to the technical field of floor grinding machines, and particularly relates to a single-cavity double-layer rotary bearing type gearbox for floor grinding machines. Background Technology

[0002] In many fields such as building decoration and industrial plant floor treatment, floor grinding is a crucial process to ensure floor quality and improve aesthetics and flatness. The floor grinding machine, as the core equipment for this operation, directly determines the grinding effect and efficiency. The gearbox, as the core transmission component of the floor grinding machine, plays a vital role in the overall performance of the machine due to its rational structural design.

[0003] Traditional single-cavity double-layer rotary bearing floor grinder gearboxes, despite employing a double-layer structure design that spatially divides the transmission components to achieve more efficient transmission and a more rational layout, still have many problems that urgently need to be solved in actual use.

[0004] Traditional gearboxes have an independent double-layer structure with no effective internal connection between the upper and lower chambers. To achieve lubricant circulation between the upper and lower chambers and ensure adequate lubrication of all transmission components, an external pump is typically required to drive the lubricant transfer. This design introduces several drawbacks. First, the addition of an external pump not only complicates the overall gearbox structure and occupies more space, but also increases manufacturing costs and maintenance difficulty. During installation and commissioning, additional considerations must be given to the layout of the external pump and the laying of connecting pipelines, further increasing the complexity and workload of construction.

[0005] Secondly, the operation of the external pump requires additional energy, which undoubtedly reduces the overall transmission efficiency of the gearbox and increases energy consumption. Over long-term use, this additional energy consumption will constitute a significant expense, hindering energy-efficient operation and cost control.

[0006] Furthermore, the presence of an external pump and its connecting pipes makes the lubrication system prone to leaks. Leaks not only waste lubricating oil and pollute the working environment, but can also lead to excessive wear of transmission components due to insufficient lubrication, shortening the gearbox's lifespan. In addition, external pumps have a relatively high failure rate; a malfunction will directly affect the normal operation of the lubrication system, leading to a decrease in the overall transmission performance of the gearbox, and even causing equipment shutdown, thus disrupting the grinding operation.

[0007] To address the problems existing in the above-mentioned prior art, a novel single-cavity double-layer rotary bearing type gearbox for floor grinding machines is developed to optimize the lubricating oil communication between the double-layer structure and improve sealing performance. This enhances the overall performance of the gearbox, reduces maintenance costs, and extends its service life, which is of significant practical importance. Utility Model Content

[0008] To address the problems existing in the prior art, this utility model provides a single-cavity double-layer rotary bearing type gearbox for floor grinding machines.

[0009] This utility model is implemented as follows: a single-cavity double-layer rotary bearing type floor grinding machine gearbox includes: a gearbox body, a gearbox cover, and a motor flange disposed above the gearbox cover. The motor flange is connected to a central gear shaft through a rotary bearing assembly, and the central gear shaft is vertically disposed inside the gearbox body.

[0010] The slewing support assembly includes an outer gear ring fixedly connected to the motor flange, and an inner ring connected to the partition plate;

[0011] A partition is installed inside the gearbox via a support column. The partition is connected to the lower surface of the inner ring by fasteners. The partition divides the inside of the gearbox into an upper grinding revolution transmission chamber and a lower grinding rotation transmission chamber. A lubricating oil notch is provided on the periphery of the partition to connect the grinding revolution transmission chamber and the grinding rotation transmission chamber.

[0012] The grinding revolution transmission chamber is provided with two revolution pinions that mesh with the external gear ring respectively. Each revolution pinion is installed between the partition and the bottom of the gearbox through a revolution pinion shaft.

[0013] A large synchronous gear is provided on the small gear shaft of the grinding self-rotation transmission chamber.

[0014] An intermediate gear shaft is provided between the gearbox and the partition in the grinding self-rotation transmission chamber. An intermediate gear is provided on the intermediate gear shaft to mesh with the large synchronous gear of revolution. The large synchronous gear of revolution and the intermediate gear are respectively connected to the transmission mechanism for driving the grinding head to rotate, which is set in the gearbox.

[0015] The housing cover is provided with sealing components between the motor flange and the inner ring and the central gear shaft.

[0016] More preferably, the transmission mechanism includes: a grinding head drive gear, which is coaxially fixed to the grinding head drive shaft; the grinding head drive shaft is rotatably supported between the gearbox and the partition via a bearing assembly, and its output end extends to the outside of the gearbox to connect to the grinding head actuation component.

[0017] More preferably, the sealing member is a skeleton seal.

[0018] More preferably, the central gear shaft, the planetary pinion shaft, and the grinding head drive shaft are mounted between the partition plate and the bottom of the gear housing via cylindrical roller bearings.

[0019] More preferably, the bottom of the gearbox body is provided with reinforcing protrusions corresponding to the central gear shaft, the orbital pinion shaft, and the grinding head drive shaft.

[0020] The advantages and technical effects of this utility model are as follows: This single-cavity double-layer rotary bearing type floor grinder gearbox, through its unique design, exhibits significant advantages in lubrication, space utilization, transmission efficiency, and overall reliability. Specific technical effects are as follows:

[0021] In terms of lubrication performance, it achieves efficient and uniform lubrication. Traditional independent chamber structures rely on external pumps to connect lubricating oil, which is not only structurally complex but also prone to leakage. This gearbox, however, uses a partition separating the upper and lower chambers and connecting them through a lubricating oil notch. This allows the lubricating oil to circulate naturally under the influence of gear agitation and gravity, eliminating the need for an external pump, simplifying the lubrication system, and reducing costs and failure rates. Simultaneously, the lubricating oil can flow freely between the upper and lower transmission chambers, ensuring that all transmission components in the revolution and rotation transmission chambers, such as the planetary pinion, intermediate gears, and the planetary synchronizing gear, receive sufficient and uniform lubrication. This reduces wear and heat generation caused by insufficient lubrication, extending the service life of the transmission components.

[0022] In terms of space utilization, this gearbox has a compact and rational structure. Traditional independent chamber structures require space to be reserved for external pumps and their connecting pipes, resulting in a bulky overall structure. This structure eliminates the need for external pumps and related pipes, using only partitions to separate and connect the chambers, greatly saving space and making the internal structure of the gearbox more compact. This not only reduces the size and weight of the gearbox but also facilitates the installation, transportation, and maintenance of the equipment, improving its ease of use.

[0023] In terms of transmission efficiency, this gearbox performs exceptionally well. Its compact structure reduces the distance between transmission components and transmission links, minimizing energy loss during transmission. Simultaneously, smooth lubricating oil circulation reduces frictional resistance caused by poor lubrication, further improving transmission efficiency. This allows the power output from the motor to be more effectively transmitted to the grinding head, enhancing the performance of the floor grinder and enabling more efficient floor grinding operations.

[0024] In terms of overall reliability, the sealing components play a crucial role. The sealing components installed between the gearbox cover and the motor flange, and between the inner ring and the central gear shaft, effectively prevent external dust and impurities from entering the gearbox, while also preventing lubricating oil leakage. This provides a clean, stable, and well-lubricated working environment for the transmission components, ensuring the reliability and stability of the transmission system, extending the gearbox's service life, and reducing equipment maintenance costs. Attached Figure Description

[0025] Figure 1 and Figure 2 A three-dimensional structural diagram of this utility model;

[0026] Figure 3a This is a top view of the present invention;

[0027] Figure 3b yes Figure 3a FF section view;

[0028] Figure 3c yes Figure 3a 3D sectional view of the middle FF;

[0029] Figure 4 This is a schematic diagram of the internal structure of the gearbox without the top cover and motor flange;

[0030] Figure 5 This is a schematic diagram of the internal structure of a partition-structured gearbox.

[0031] Figure 6 This is a top view of the partition;

[0032] Figure 7 This is a schematic diagram of the three-dimensional structure of the partition;

[0033] Figure 8 This is a schematic diagram of the installation structure of the planetary pinion with a tensioning sleeve.

[0034] In the diagram: 1. Gearbox housing; 101. Reinforcing protrusion; 2. Housing cover; 3. Motor flange; 4. Rotary support assembly; 41. External gear ring; 42. Inner ring; 5. Central gear shaft; 6. Partition plate; 61. Lubricating oil notch; 71. Grinding revolution transmission chamber; 72. Grinding rotation transmission chamber; 81. Revolution pinion; 82. Revolution pinion shaft; 83. Revolution synchronous large gear; 91. Intermediate gear shaft; 92. Intermediate gear; 10. Transmission mechanism; 11. Grinding head drive gear; 12. Grinding head drive shaft; 13. Support column. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0036] Please see Figures 1 to 7 A single-cavity, double-layer rotary bearing type gearbox for a floor grinder includes: a gearbox body 1, a gearbox cover 2, and a motor flange 3 disposed above the gearbox cover. The motor flange is connected to a central gear shaft 5 via a rotary bearing assembly 4, and the central gear shaft is vertically disposed within the gearbox body. The rotary bearing assembly 4 includes an outer gear ring 41 fixedly connected to the motor flange and an inner ring 42 connected to a partition plate. A partition plate 6 is installed within the gearbox body via a support column 13, and the partition plate is connected to the lower surface of the inner ring via fasteners. Please refer to [link to relevant documentation]. Figures 3a to 3c The partition divides the interior of the gearbox into an upper grinding revolution transmission chamber 71 and a lower grinding rotation transmission chamber 72. A lubricating oil notch 61 is provided on the periphery of the partition, connecting the grinding revolution transmission chamber and the grinding rotation transmission chamber. The grinding revolution transmission chamber 71 contains two small revolution gears 81 that mesh with the external gear ring. Each small revolution gear is mounted between the partition and the bottom of the gearbox via a small revolution gear shaft 82. The two small revolution gears are connected to the small revolution gear shaft by a key and / or a tensioning sleeve. In this embodiment, one small revolution gear is connected to the small revolution gear shaft by a key, and the other small revolution gear is connected to the corresponding small revolution gear shaft by a tensioning sleeve 84. The small revolution gears are used to achieve gear meshing with the external gear ring. Please refer to [link to relevant documentation]. Figure 8 The grinding rotation transmission chamber 72 has a small revolving gear shaft with a large revolving gear 83. An intermediate gear shaft 91 is also provided between the gearbox and the partition in the grinding rotation transmission chamber 72. An intermediate gear 92 meshes with the large revolving gear. The large revolving gear and the intermediate gear are respectively connected to a transmission mechanism 10 for driving the grinding head rotation, which is located within the gearbox. A sealing member 11 is provided between the top cover of the housing and the motor flange, and between the inner ring and the central gear shaft.

[0037] More preferably, the transmission mechanism 10 includes: a grinding head drive gear 11, which is coaxially fixed to the grinding head drive shaft 12; the grinding head drive shaft is rotatably supported between the gearbox and the partition via a bearing assembly, and its output end extends to the outside of the gearbox to connect to the grinding head actuation component.

[0038] This invention changes the traditional independent chamber structure by using a partition to divide the inside of the gearbox into upper and lower layers connected by a lubricating oil gap, resulting in several significant technical advantages:

[0039] More efficient lubricating oil circulation: Traditional independent chamber structures rely on external pumps for lubricating oil connection, resulting in complex structures and susceptibility to leakage. In this structure, the lubricating oil notches around the partition allow for natural connection between the upper and lower grinding revolution transmission chambers and the grinding rotation transmission chambers. During gearbox operation, the lubricating oil circulates naturally between the two transmission chambers thanks to the agitation of the gears and its own gravity, eliminating the need for an external pump. This simplifies the lubrication system structure and reduces equipment costs and failure rates.

[0040] More uniform lubrication: The lubricating oil can flow freely between the two transmission chambers, ensuring that all transmission components receive sufficient and uniform lubrication. Whether it is the small gear in the revolution transmission chamber or the intermediate gear and the large synchronous gear in the rotation transmission chamber, all components can receive timely lubrication, reducing wear and heat caused by insufficient lubrication and extending the service life of the transmission components.

[0041] More efficient space utilization: Traditional independent chamber structures require space for external pumps and their connecting pipes, resulting in a bulky gearbox structure. This structure eliminates the external pump and related piping, using partitions to separate and connect chambers, significantly saving space and making the gearbox's internal structure more compact. This not only reduces the gearbox's size and weight but also facilitates equipment installation, transportation, and maintenance.

[0042] Higher transmission efficiency: The compact structure reduces the distance between transmission components and transmission links, lowering energy loss during transmission. Simultaneously, smoother lubricant circulation reduces frictional resistance caused by poor lubrication, further improving transmission efficiency. This allows the motor's output power to be more effectively transmitted to the grinding head, enhancing the floor grinder's performance.

[0043] The working principle of this invention is as follows: In the floor grinding equipment using the single-cavity double-layer slewing bearing type floor grinding machine gearbox, the motor is securely mounted on the motor flange. When the equipment starts running, the motor output shaft begins to rotate, transmitting power to the connected central gear shaft, causing the central gear shaft to rotate accordingly.

[0044] The rotation of the central gear shaft becomes the power source of the entire transmission system, driving the associated transmission components to work in tandem. Specifically, the rotation of the central gear shaft drives the intermediate gears mounted on the intermediate gear shaft inside the grinding rotation transmission chamber to rotate. These intermediate gears, as key components in the rotation transmission path, further transmit power to the drive gear connected to the grinding head, enabling the grinding head to obtain rotational power and thus achieve the grinding head's rotational motion around its own axis. This is a crucial action for achieving localized fine grinding during floor grinding, effectively removing unevenness and imperfections from the floor surface and improving the flatness and smoothness of the floor.

[0045] Meanwhile, during its rotation, the intermediate gear's rotation also creates a linkage effect through the meshing of the large synchronous gear. Driven by the intermediate gear, the large synchronous gear begins to rotate and revolves around the external gear ring, which is fixedly connected to the motor flange. Since the large synchronous gear is mounted on the small gear shaft, and the small gear shaft is connected to the bottom of the gearbox, the rotation of the large synchronous gear drives the entire gearbox structure to rotate accordingly.

[0046] More importantly, the revolution of the synchronous gear is not isolated. Through its connection with the partition and the tight connection between the partition and the gearbox cover, the gearbox cover, partition, and gearbox body form a unified whole, all revolving around the external gear ring. This revolution allows the grinding head to rotate simultaneously with its own rotation and also revolve around the grinding area of ​​the floor, expanding the grinding range, improving grinding efficiency, and enabling uniform grinding of large floor areas, ensuring consistent grinding quality across the entire floor surface.

[0047] Furthermore, the sealing components installed between the gearbox cover and the motor flange, and between the inner ring and the central gear shaft, play a crucial role throughout the transmission process. These sealing components effectively prevent external dust and impurities from entering the gearbox, while also preventing lubricating oil leakage. This provides a clean, stable, and well-lubricated working environment for the transmission components inside the gearbox, ensuring the reliability and stability of the transmission system and extending the service life of the gearbox.

[0048] More preferably, the sealing component is a skeleton seal. The skeleton seal has excellent sealing performance, effectively preventing external dust and impurities from entering the gearbox and avoiding wear and corrosion of the transmission components. At the same time, it prevents lubricating oil leakage from the gearbox, ensuring that the transmission components are always in a good lubricated state, improving the stability and reliability of gearbox operation, and extending the service life of the equipment.

[0049] Preferably, the central gear shaft, the planetary pinion shaft, and the grinding head drive shaft are mounted between the partition plate and the bottom of the gear housing using cylindrical roller bearings. Cylindrical roller bearings have high radial load capacity, can withstand large loads, ensure the stability of the central gear shaft, the planetary pinion shaft, and the grinding head drive shaft during operation, and reduce wear caused by vibration and misalignment. Simultaneously, their low coefficient of friction reduces energy loss and improves transmission efficiency.

[0050] Further preferably, the bottom of the gearbox body is provided with reinforcing protrusions 101 corresponding to the central gear shaft, the planetary pinion shaft, and the grinding head drive shaft. The reinforcing protrusions can significantly improve the strength and rigidity of the shaft mounting parts at the bottom of the gearbox body. When the bearings are subjected to large loads and torques, they can effectively disperse stress, prevent deformation or damage to the bottom of the gearbox body, ensure the stable installation of each shaft, guarantee the normal operation of the transmission system, and improve the overall reliability and durability of the gearbox.

[0051] In summary, the gearbox of this single-cavity double-layer rotary bearing floor grinder achieves an organic combination of the grinding head's rotation and revolution through ingenious structural design. This ensures both the fineness of the grinding and the efficiency of the grinding process. At the same time, its excellent sealing performance provides a strong guarantee for the long-term stable operation of the equipment.

[0052] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A single-cavity, double-layer rotary bearing type gearbox for floor grinding machines, characterized in that: include: The gearbox housing, the housing cover, and the motor flange disposed above the housing cover, wherein the motor flange is connected to the central gear shaft via a rotary support assembly, and the central gear shaft is vertically disposed within the gearbox housing; The slewing support assembly includes an outer gear ring fixedly connected to the motor flange, and an inner ring connected to the partition plate; A partition is installed inside the gearbox via a support column. The partition is connected to the lower surface of the inner ring by fasteners. The partition divides the inside of the gearbox into an upper grinding revolution transmission chamber and a lower grinding rotation transmission chamber. A lubricating oil notch is provided on the periphery of the partition to connect the grinding revolution transmission chamber and the grinding rotation transmission chamber. The grinding revolution transmission chamber is provided with two revolution pinions that mesh with the external gear ring respectively. Each revolution pinion is installed between the partition and the bottom of the gearbox through a revolution pinion shaft. A large synchronous gear is provided on the small gear shaft of the grinding self-rotation transmission chamber. An intermediate gear shaft is provided between the gearbox and the partition in the grinding self-rotation transmission chamber. An intermediate gear is provided on the intermediate gear shaft to mesh with the large synchronous gear of revolution. The large synchronous gear of revolution and the intermediate gear are respectively connected to the transmission mechanism for driving the grinding head to rotate, which is set in the gearbox. The housing cover is provided with sealing components between the motor flange and the inner ring and the central gear shaft.

2. The gearbox of the single-cavity double-layer rotary bearing type floor grinding machine according to claim 1, characterized in that: The transmission mechanism includes: a grinding head drive gear, which is coaxially fixed to the grinding head drive shaft; the grinding head drive shaft is rotatably supported between the gearbox and the partition via a bearing assembly, and its output end extends to the outside of the gearbox to connect to the grinding head actuation component.

3. The gearbox of the single-cavity double-layer rotary bearing type floor grinding machine according to claim 1, characterized in that: The sealing component is a skeleton seal.

4. The gearbox of the single-cavity double-layer rotary bearing type floor grinding machine according to claim 2, characterized in that: The central gear shaft, the orbital pinion shaft, and the grinding head drive shaft are mounted between the partition plate and the bottom of the gearbox via cylindrical roller bearings.

5. The gearbox of the single-cavity double-layer rotary bearing type floor grinding machine according to claim 2, characterized in that: The bottom of the gearbox is provided with reinforcing protrusions corresponding to the central gear shaft, the orbital pinion shaft, and the grinding head drive shaft.

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