Planetary gearbox and floor grinding machine

Abstract

The utility model discloses a planetary gearbox and a floor grinding machine, and belongs to the technical field of floor grinding machines. An input hole is formed in an input box body of the planetary gear box; the mounting disc is arranged between the input box body and the output box body; the external bearing is arranged in the input hole; the internal bearing is arranged on one side, facing the mounting disc, of the external bearing; the oil seal ring is arranged between the external bearing and the internal bearing so as to separate the external bearing from the internal bearing; the input shaft is sequentially arranged in the external bearing, the oil seal ring and the internal bearing in a penetrating mode, and the input shaft can transmit power input by the input hole into the output box body. The planetary gearbox disclosed by the utility model has the advantages of improving rigidity, precision and service life, reducing maintenance cost, adapting to complex working conditions and ensuring efficient and stable operation of equipment.

Description

Technical Field

[0001] This utility model relates to the field of floor grinding machine technology, and in particular to a planetary gearbox and a floor grinding machine. Background Technology

[0002] Floor grinding machines are widely used in the construction, decoration, and floor treatment industries, primarily for grinding and polishing concrete, stone, and other floor surfaces. The planetary gearbox, as the core transmission component of the floor grinding machine, directly affects the grinding efficiency, operational stability, and service life of the equipment. Traditional floor grinding machine planetary gearboxes typically employ a single-bearing support structure, with the input shaft supported by only one bearing. This design presents several problems: First, under large radial and axial loads, the single-bearing support structure is prone to shaft deformation and vibration, leading to decreased gear meshing accuracy and consequently affecting transmission efficiency and equipment stability. Second, because the input shaft is supported by only one bearing, the distribution of lubricating oil may be uneven, resulting in accelerated wear of the bearing and gears and shortening the equipment's service life. Third, in traditional designs, the sealing performance between the bearing and the external environment is poor, easily leading to lubricating oil leakage or the entry of external contaminants, further exacerbating equipment wear and increasing the failure rate. Utility Model Content

[0003] The purpose of this invention is to provide a planetary gearbox and a floor grinding machine, which, through the support of double bearings and oil seal rings, has the advantages of improving rigidity, accuracy and lifespan, reducing maintenance costs, adapting to complex working conditions, and ensuring efficient and stable operation of the equipment.

[0004] In a first aspect, this utility model provides a planetary gearbox, comprising:

[0005] The input box is equipped with an input port;

[0006] Output enclosure;

[0007] An installation panel is located between the input housing and the output housing;

[0008] An external bearing is provided inside the input hole;

[0009] An internal bearing is located on the side of the external bearing facing the mounting plate;

[0010] An oil seal ring is disposed between the outer bearing and the inner bearing to separate the outer bearing and the inner bearing;

[0011] An input shaft is sequentially inserted into the outer bearing, the oil seal ring, and the inner bearing, and the input shaft can transmit the power input through the input hole to the output housing.

[0012] The planetary gearbox provided by this invention achieves a dual-bearing support structure for the input shaft by setting external and internal bearings within the input port and separating them with oil seals. This design significantly improves the support stiffness of the input shaft, reduces shaft deformation and vibration under load, thereby improving gear meshing accuracy and transmission efficiency. The oil seals separate the lubrication areas of the external and internal bearings, ensuring that each bearing receives an appropriate amount of lubricating oil, avoiding uneven lubrication, and preventing lubricating oil leakage and the entry of external contaminants, protecting the cleanliness of the bearings and gear system, and extending equipment life. The external bearing is closer to the external environment and bears larger radial loads and impacts; the internal bearing is in a clean environment and mainly bears gear meshing loads. This partitioned design allows the planetary gearbox to adapt to complex working conditions and maintain efficient and stable operation. The sealing effect of the oil seals reduces lubricating oil leakage and the entry of contaminants, lowering maintenance frequency and costs, while the dual-bearing support structure improves operational stability and reduces failures caused by vibration and wear.

[0013] Furthermore, the mounting plate is provided with a connecting hole connecting the input housing and the output housing, the output housing is provided with a first mounting groove, the first mounting groove is provided with a first bearing, and the end of the input shaft away from the input hole passes through the connecting hole and is inserted into the first bearing.

[0014] By adopting the above technical solution, through the design of the connecting hole and the first bearing, the input shaft can smoothly pass through the mounting plate and be fixed in the output housing, which further enhances the support and stability of the input shaft, reduces vibration and noise, and improves the operating efficiency of the gearbox.

[0015] Furthermore, the number of the first bearings is at least two, and the at least two first bearings are stacked in the first mounting groove.

[0016] By adopting the above technical solution, increasing the number of first bearings increases the support points of the input shaft, thereby distributing the load, reducing the wear of individual bearings, extending the service life of bearings, and improving the load-bearing capacity and operational stability of the gearbox.

[0017] Furthermore, the mounting plate is provided with a second mounting groove around the connecting hole, and a second bearing is provided in the second mounting groove, through which the input shaft passes.

[0018] By adopting the above technical solution, the installation of the second bearing further enhances the support for the input shaft, especially when the input shaft passes through the mounting plate, reducing the deflection and vibration of the shaft during operation, and ensuring the smoothness and reliability of power transmission.

[0019] Furthermore, it also includes a drive shaft that passes through the input housing and the output housing. The input housing is provided with a first gear transmission assembly, and the output housing is provided with a second gear transmission assembly. The input end of the second gear transmission assembly is connected to the input shaft, and the opposite ends of the drive shaft are respectively connected to the first gear transmission assembly and the second gear transmission assembly.

[0020] Furthermore, the output housing has a third mounting groove on the side facing the mounting plate, and a third bearing is provided in the third mounting groove, with the end of the drive shaft passing through the third bearing.

[0021] By adopting the above technical solution, the third bearing provides additional support for the drive shaft, reduces vibration and deflection of the drive shaft during operation, ensures the smoothness and reliability of power transmission, and extends the service life of the drive shaft.

[0022] Furthermore, the number of the third bearings is at least two, and the at least two third bearings are stacked in the third mounting groove.

[0023] Furthermore, the mounting plate is provided with a fourth mounting groove, and a fourth bearing is provided in the fourth mounting groove. The input box is provided with a fifth mounting groove, and a fifth bearing is provided in the fifth mounting groove. The drive shaft passes through the fourth bearing and the fifth bearing respectively.

[0024] By adopting the above technical solution, the fourth and fifth bearings provide multi-point support for the drive shaft, ensuring the stability and accuracy of the drive shaft during operation, reducing vibration and noise, and improving the overall performance and reliability of the gearbox.

[0025] Furthermore, the input hole is provided with a first mounting boss and a second mounting boss in sequence from near the opening to far away from the opening, the external bearing is provided on the first mounting boss, and the oil seal ring is provided on the second mounting boss.

[0026] By adopting the above technical solution, the design of the first mounting boss and the second mounting boss enables the external bearing and oil seal ring to be installed precisely, ensuring the positioning accuracy of the bearing and the sealing effect of the oil seal, reducing the risk of lubricating oil leakage, and improving the sealing performance and reliability of the gearbox.

[0027] Secondly, the present invention provides a floor grinding machine, which includes any of the aforementioned planetary gearboxes.

[0028] As can be seen from the above, the planetary gearbox provided by this utility model achieves a dual-bearing support structure for the input shaft by setting external and internal bearings in the input hole and separating them with oil seals. This design significantly improves the support stiffness of the input shaft, reduces shaft deformation and vibration under load, thereby improving gear meshing accuracy and transmission efficiency. The oil seals separate the lubrication areas of the external and internal bearings, ensuring that each bearing receives an appropriate amount of lubricating oil, avoiding uneven lubrication, and preventing lubricating oil leakage and the entry of external contaminants, protecting the cleanliness of the bearings and gear system, and extending the equipment life. The external bearing is closer to the external environment and bears larger radial loads and impacts, while the internal bearing is in a clean environment and mainly bears gear meshing loads. This partitioned design allows the planetary gearbox to adapt to complex working conditions and maintain efficient and stable operation. The sealing effect of the oil seals reduces lubricating oil leakage and the entry of contaminants, reducing maintenance frequency and costs. At the same time, the dual-bearing support structure improves operational stability and reduces failures caused by vibration and wear.

[0029] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing embodiments of this application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings. Attached Figure Description

[0030] Figure 1 This is a cross-sectional structural diagram of a planetary gearbox proposed in this utility model.

[0031] Figure 2 for Figure 1 Enlarged structural diagram of region A of the central planetary gearbox.

[0032] Figure 3 This is a cross-sectional structural diagram of a planetary gearbox proposed in this utility model from another perspective.

[0033] Figure 4 for Figure 3 A schematic diagram of the structure of the planetary gearbox after the input housing has been removed.

[0034] Figure 5 for Figure 3 A schematic diagram of the structure of the medium planetary gearbox after the output housing is removed.

[0035] Figure 6 for Figure 3 Enlarged structural diagram of region B of the planetary gearbox.

[0036] In the attached diagram: 100, Input housing; 110, Input hole; 111, External bearing; 112, Internal bearing; 113, Oil seal ring; 114, First mounting boss; 115, Second mounting boss; 120, First gear transmission assembly; 130, Fifth mounting slot; 131, Fifth bearing; 200, Output housing; 210, First mounting slot; 211, First bearing; 220, Second gear transmission assembly; 230, Third mounting slot; 231, Third bearing; 300, Mounting plate; 310, Connecting hole; 320, Second mounting slot; 321, Second bearing; 322, Support ring; 330, Fourth mounting slot; 331, Fourth bearing; 400, Input shaft; 410, Third mounting boss; 420, Meshing gear; 500, Transmission shaft. Detailed Implementation

[0037] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0038] The following disclosure provides many different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0039] The planetary gearbox disclosed in this utility model is mainly used in floor grinding machines. With the support of double bearings and oil seal rings, it has the advantages of improving rigidity, accuracy and life, reducing maintenance costs, adapting to complex working conditions, and ensuring efficient and stable operation of the equipment.

[0040] Reference Appendix Figure 1 Appendix Figure 2In one embodiment, the planetary gearbox includes an input housing 100, an output housing 200, a mounting plate 300, an external bearing 111, an internal bearing 112, an oil seal ring 113, and an input shaft 400. The input housing 100 has an input hole 110; the mounting plate 300 is located between the input housing 100 and the output housing 200; the external bearing 111 is located inside the input hole 110; the internal bearing 112 is located on the side of the external bearing 111 facing the mounting plate 300; the oil seal ring 113 is located between the external bearing 111 and the internal bearing 112 to separate the external bearing 111 and the internal bearing 112; the input shaft 400 passes sequentially through the external bearing 111, the oil seal ring 113, and the internal bearing 112, and the input shaft 400 can transmit the power input through the input hole 110 to the output housing 200.

[0041] As can be seen from the above, the planetary gearbox provided by this utility model achieves a dual-bearing support structure for the input shaft 400 by setting an external bearing 111 and an internal bearing 112 within the input hole 110 and separating them with an oil seal ring 113. This design significantly improves the support stiffness of the input shaft 400, reduces shaft deformation and vibration under load, thereby improving gear meshing accuracy and transmission efficiency. The oil seal ring 113 separates the lubrication areas of the external bearing 111 and the internal bearing 112, ensuring that each bearing receives an appropriate amount of lubricating oil, avoiding uneven lubrication, and preventing lubricating oil leakage and the entry of external contaminants, protecting the cleanliness of the bearings and gear system, and extending the equipment life. The external bearing 111 is close to the external environment and bears a large radial load and impact; the internal bearing 112 is in a clean environment and mainly bears the gear meshing load. This partitioned design allows the planetary gearbox to adapt to complex working conditions and maintain efficient and stable operation. The sealing effect of the oil seal ring 113 reduces lubricating oil leakage and the entry of contaminants, reduces maintenance frequency and cost, while the dual-bearing support structure improves operational stability and reduces failures caused by vibration and wear.

[0042] Reference Appendix Figure 2 In one embodiment, the mounting plate 300 is provided with a connecting hole 310 connecting the input housing 100 and the output housing 200. The output housing 200 is provided with a first mounting groove 210. A first bearing 211 is provided in the first mounting groove 210. One end of the input shaft 400 away from the input hole 110 passes through the connecting hole 310 and is inserted into the first bearing 211.

[0043] By adopting the above technical solution, through the design of the connecting hole 310 and the first bearing 211, the input shaft 400 can smoothly pass through the mounting plate 300 and be fixed in the output housing 200, which further enhances the support and stability of the input shaft 400, reduces vibration and noise, and improves the operating efficiency of the gearbox.

[0044] In one embodiment, the number of first bearings 211 is at least two, and at least two first bearings 211 are stacked in the first mounting groove 210.

[0045] By adopting the above technical solution, increasing the number of first bearings 211 can increase the support points of the input shaft 400, thereby distributing the load, reducing the wear of individual bearings, extending the service life of bearings, and improving the load-bearing capacity and operational stability of the gearbox.

[0046] In one embodiment, the mounting plate 300 is further provided with a second mounting groove 320 around the connecting hole 310, and a second bearing 321 is provided in the second mounting groove 321, through which the input shaft 400 passes.

[0047] Specifically, the input shaft 400 is provided with a third mounting boss 410, which is used to support the side of the second bearing 321 away from the mounting plate 300; a support ring 322 is also provided between the second bearing 321 and the inner bearing 112, which supports the inner bearing 112.

[0048] By adopting the above technical solution, the setting of the second bearing 321 further enhances the support for the input shaft 400. In particular, when the input shaft 400 passes through the mounting plate 300, it reduces the deflection and vibration of the shaft during operation, ensuring the smoothness and reliability of power transmission.

[0049] In one embodiment, the input hole 110 is provided with a first mounting boss 114 and a second mounting boss 115 in sequence from near the hole to far away from the hole. The external bearing 111 is provided on the first mounting boss 114 and the oil seal ring 113 is provided on the second mounting boss 115.

[0050] By adopting the above technical solution, the design of the first mounting boss 114 and the second mounting boss 115 enables the external bearing 111 and the oil seal ring 113 to be installed precisely, ensuring the positioning accuracy of the bearing and the sealing effect of the oil seal, reducing the risk of lubricating oil leakage, and improving the sealing performance and reliability of the gearbox.

[0051] Reference Appendix Figure 3 Appendix Figure 4 Appendix Figure 5 In one embodiment, the device further includes a drive shaft 500, which passes through the input housing 100 and the output housing 200. The input housing 100 is provided with a first gear transmission assembly 120, and the output housing 200 is provided with a second gear transmission assembly 220. The input end of the second gear transmission assembly 220 is connected to the input shaft 400, and the opposite ends of the drive shaft 500 are respectively connected to the first gear transmission assembly 120 and the second gear transmission assembly 220.

[0052] Specifically, the input shaft 400 is provided with a meshing gear 420 at one end of the output housing 200, and the meshing gear 420 at the inlet and outlet ends of the second gear transmission assembly 220 meshes with it.

[0053] Reference Appendix Figure 6 In one embodiment, the output housing 200 is provided with a third mounting groove 230 on the side facing the mounting plate 300, and a third bearing 231 is provided in the third mounting groove 230. The end of the drive shaft 500 passes through the third bearing 231.

[0054] By adopting the above technical solution, the third bearing 231 provides additional support for the transmission shaft 500, reduces the vibration and deflection of the transmission shaft 500 during operation, ensures the smoothness and reliability of power transmission, and extends the service life of the transmission shaft 500.

[0055] In one embodiment, the number of third bearings 231 is at least two, and at least two third bearings 231 are stacked in the third mounting groove 230.

[0056] In one embodiment, the mounting plate 300 is provided with a fourth mounting groove 330, and a fourth bearing 331 is provided in the fourth mounting groove 330. The input box 100 is provided with a fifth mounting groove 130, and a fifth bearing 131 is provided in the fifth mounting groove 131. The drive shaft 500 passes through the fourth bearing 331 and the fifth bearing 131 respectively.

[0057] By adopting the above technical solution, the fourth bearing 331 and the fifth bearing 131 provide multi-point support for the transmission shaft 500, ensuring the stability and accuracy of the transmission shaft 500 during operation, reducing vibration and noise, and improving the overall performance and reliability of the gearbox.

[0058] This utility model also provides a floor grinding machine, including the planetary gearbox of any of the above embodiments.

[0059] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0060] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A planetary gearbox, characterized in that, The utility model relates to a kind of transmission mechanism, including: Input box (100) is equipped with input hole (110); Output box (200); Mounting disc (300) is located between the input box (100) and the output box (200); External bearing (111) is located in the input hole (110); Internal bearing (112) is located at the side of the external bearing (111) towards the mounting disc (300); Oil seal ring (113) is located between the external bearing (111) and the internal bearing (112) to separate the external bearing (111) and the internal bearing (112); Input shaft (400) is sequentially arranged in the external bearing (111), the oil seal ring (113) and the internal bearing (112), and the input shaft (400) can transmit power input by the input hole (110) to the output box (200).

2. A planetary gearbox according to claim 1, characterised in that, The mounting disc (300) is provided with a connecting hole (310) that communicates the input box (100) and the output box (200), the output box (200) is provided with a first mounting groove (210), the first mounting groove (210) is provided with a first bearing (211), and the end of the input shaft (400) away from the input hole (110) is inserted into the first bearing (211) through the connecting hole (310).

3. A planetary gearbox according to claim 2, characterised in that, The number of the first bearing (211) is at least two, and at least two first bearings (211) are stacked in the first mounting groove (210).

4. A planetary gearbox according to claim 3, characterised in that, The mounting disc (300) is also provided with a second mounting groove (320) around the connecting hole (310), the second mounting groove (320) is provided with a second bearing (321), and the input shaft (400) is arranged in the second bearing (321).

5. A planetary gearbox as claimed in claim 2, characterised in that, It also includes a transmission shaft (500), the transmission shaft (500) is arranged in the input box (100) and the output box (200), the input box (100) is provided with a first gear transmission assembly (120), the output box (200) is provided with a second gear transmission assembly (220), the input end of the second gear transmission assembly (220) is connected with the input shaft (400), and the opposite ends of the transmission shaft (500) are connected with the first gear transmission assembly (120) and the second gear transmission assembly (220) respectively.

6. A planetary gearbox according to claim 5, characterised in that, The output box (200) is provided with a third mounting groove (230) on the side towards the mounting disc (300), the third mounting groove (230) is provided with a third bearing (231), and the end of the transmission shaft (500) is arranged in the third bearing (231).

7. A planetary gearbox according to claim 6, characterised in that, The number of the third bearing (231) is at least two, and at least two third bearings (231) are stacked in the third mounting groove (230).

8. A planetary gearbox as claimed in claim 5, characterised in that, The mounting disc (300) is provided with a fourth mounting groove (330), the fourth mounting groove (330) is provided with a fourth bearing (331), the input box (100) is provided with a fifth mounting groove (130), the fifth mounting groove (130) is provided with a fifth bearing (131), and the transmission shaft (500) is respectively arranged in the fourth bearing (331) and the fifth bearing (131).

9. A planetary gearbox as claimed in claim 1, characterised in that, The input hole (110) is sequentially provided with a first mounting boss (114) and a second mounting boss (115) from the hole mouth to the hole mouth, the outer bearing (111) is arranged on the first mounting boss (114), and the oil seal ring (113) is arranged on the second mounting boss (115).

10. A floor grinding machine characterized by, A planetary gearbox comprising any one of claims 1-9.

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