Gearbox output structure
By replacing tapered bearings with spherical plain bearings and adding lubrication grooves to the inner and outer rings of the bearings, the problems of large space occupation and weak load-bearing capacity in the existing gearbox output structure are solved, realizing the miniaturization and high reliability design of the gearbox and extending its service life.
Patent Information
- Application Number
- CN202422964372.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-03
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-12-03
AI Technical Summary
In existing gearbox output structures, tapered bearings are large in size, occupy a lot of space, have weak load-bearing capacity, and short service life, which affects the performance and reliability of the gearbox.
The tapered bearing is replaced by a first spherical plain bearing and a second spherical plain bearing. The bearing is connected to the output gear shaft through a rotating frame. The inner and outer rings of the spherical plain bearing are integrated into the rotating frame or housing, reducing assembly steps. Lubricating oil grooves are set in the inner and outer rings of the spherical plain bearing to improve lubrication and enhance the bearing's load-bearing capacity and wear resistance.
This design enables miniaturization of the gearbox, reduces manufacturing costs, extends service life, improves the operational stability and failure rate of the output gear shaft, reduces bearing wear, and enhances the overall performance of the gearbox.
Smart Images
Figure CN223725341U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to gear box field, specifically, relate to a gear box output structure. BACKGROUND
[0002] Gear box output structure mainly contains box, round nut, conical bearing, oil seal, oil nozzle, conical bearing, screw, cover plate, oil seal and output gear shaft etc., and the output gear shaft is an important component of the output structure, and is also one of the key parts of the whole gear box, influences the performance of the gear box, the output gear shaft is generally supported through two groups of conical bearings, so that the output gear shaft can rotate around the own axis relative to the box.
[0003] The inventor found in the research that the gear box output structure of prior art has at least the following shortcomings:
[0004] The conical bearing is large in size, large in axial space occupation, increases the axial space of the gear box, in addition, the bearing capacity of the conical bearing is weak, and the service life is short, thereby influencing the service life of the gear output shaft. UTILITY MODEL CONTENTS
[0005] The utility model discloses a gear box output structure, which can compress the axial space of the gear box, facilitate the miniaturization design of the gear box, save the machining material and cost of the box, and has strong bearing capacity, low failure rate and long service life.
[0006] The embodiment of the utility model can be realized as follows:
[0007] In a first aspect, the utility model provides a gear box output structure, which comprises:
[0008] Box, rotating frame, output gear shaft, first joint bearing and second joint bearing, the rotating frame is connected with the output gear shaft, and the two are fixed relative to each other in the circumferential direction of the output gear shaft, the rotating frame or the output gear shaft is rotatably matched with the box through the first joint bearing, and the output gear shaft is rotatably matched with the box through the second joint bearing.
[0009] In an optional embodiment, the inner ring of the first joint bearing is integrated on the rotating frame or the output gear shaft, or the outer ring of the first joint bearing is integrated on the box.
[0010] Based on the above scheme, the inner ring of the first knuckle bearing is arranged in an integrated structure with the rotating frame or the output gear shaft, the structure is compact, the structural strength is high, and the process of assembling the inner ring of the first knuckle bearing and the rotating frame or the output gear shaft together is omitted, the assembly steps are simplified, and the assembly efficiency is improved. Similarly, the outer ring of the first knuckle bearing is integrated on the box, the two are combined tightly, the structural strength is high, the assembly process is saved, and the assembly efficiency is improved.
[0011] In an optional embodiment, the inner ring of the first knuckle bearing is arranged in a split structure with the rotating frame, a limiting step is arranged on the rotating frame, and the side of the inner ring of the first knuckle bearing away from the second knuckle bearing abuts against the limiting step.
[0012] Based on the above scheme, the inner ring of the first knuckle bearing is clamped between the outer ring and the limiting step, the position is stable and reliable, and assembly is facilitated.
[0013] In an optional embodiment, the inner ring of the first knuckle bearing is arranged in a split structure with the output gear shaft, a locking nut is screwed on the outer side of the output gear shaft, and the side of the inner ring of the first knuckle bearing away from the second knuckle bearing abuts against the locking nut.
[0014] Based on the above scheme, the inner ring of the first knuckle bearing is sleeved on the outer side of the output gear shaft, and then the locking nut is screwed on the outer side of the output gear shaft, the inner ring is abutted against the outer ring by the locking nut, and assembly is facilitated.
[0015] In an optional embodiment, the inner ring of the second knuckle bearing is integrated on the output gear shaft, or the outer ring of the second knuckle bearing is integrated on the box.
[0016] Based on the above scheme, the processes of assembling the inner ring of the second knuckle bearing to the output gear shaft and assembling the outer ring of the second knuckle bearing to the box are omitted, the assembly steps are reduced, and the assembly efficiency is improved.
[0017] In an optional embodiment, a first oil hole for guiding lubricating oil to the first knuckle bearing is arranged on the box.
[0018] Based on the above scheme, the lubricating oil flows in the first oil hole, can carry away the heat generated in the running process of the first knuckle bearing, and can lubricate the first knuckle bearing when the lubricating oil flows through the first knuckle bearing, so as to reduce the wear speed of the first knuckle bearing, thereby improving the wear resistance and service life.
[0019] In an optional embodiment, a second oil hole for guiding lubricating oil to the second knuckle bearing is arranged on the box.
[0020] Based on the above scheme, the lubricating oil flows in the second oil hole, can take away the heat generated in the running process of the second joint bearing, and the lubricating oil can lubricate the second joint bearing when flowing through the second joint bearing, so as to reduce the wear speed of the second joint bearing, thereby improving the wear resistance and service life.
[0021] In an optional embodiment, an outer surface of the inner ring of the first joint bearing or an inner surface of the outer ring of the first joint bearing is provided with a lubricating oil groove.
[0022] Based on the above scheme, by providing the lubricating oil groove on the inner ring or the outer ring of the first joint bearing, the flow of the lubricating oil between the inner ring and the outer ring can be increased during work, the residence time of the lubricating oil is prolonged, the effect of taking away the heat generated on the bearing surface by lubrication is good, the lubrication performance of the bearing surface is further improved, and the service life of the bearing is prolonged.
[0023] In an optional embodiment, an outer surface of the inner ring of the second joint bearing or an inner surface of the outer ring of the second joint bearing is provided with a lubricating oil groove.
[0024] Based on the above scheme, by providing the lubricating oil groove on the inner ring or the outer ring of the second joint bearing, the flow of the lubricating oil between the inner ring and the outer ring can be increased during work, the residence time of the lubricating oil is prolonged, the effect of taking away the heat generated on the bearing surface by lubrication is good, the lubrication performance of the bearing surface is further improved, and the service life of the bearing is prolonged.
[0025] In an optional embodiment, the lubricating oil groove is provided as a strip-shaped groove or a grid-shaped groove.
[0026] Based on the above scheme, different types of lubricating oil grooves are designed according to the working conditions, so as to improve the lubrication effect, improve the heat dissipation performance, and prolong the service life of the bearing.
[0027] The beneficial effects of the embodiments of the utility model include, for example:
[0028] In summary, the gear box output structure provided by the embodiment utilizes the cooperation of the first joint bearing and the second joint bearing to realize the assembly of the output gear shaft and the box body. Since the axial dimensions of the first joint bearing and the second joint bearing are small, the axial dimension of the gear box can be reduced, the weight of the gear box is lightened, the miniaturization design of the gear box is facilitated, the assembly of the gear box is facilitated, and the manufacturing cost of the gear box is reduced. At the same time, the first joint bearing and the second joint bearing have strong load bearing performance, low failure rate, and long service life, have good support effect, the operation of the output gear shaft is stable and reliable, and the service life is long. BRIEF DESCRIPTION OF DRAWINGS
[0029] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.
[0030] Figure 1 Figure is a schematic diagram of the gear box output structure of the embodiment of the present application;
[0031] Figure 2 Figure is a schematic diagram of the gear box output structure of the embodiment of the present application; Figure 1
[0032] Figure 3 Figure is a schematic diagram of the first deformation example of the gear box output structure of the embodiment of the present application;
[0033] Figure 4 Figure is a schematic diagram of the second deformation example of the gear box output structure of the embodiment of the present application;
[0034] Figure 5 Figure is a schematic diagram of the third deformation example of the gear box output structure of the embodiment of the present application;
[0035] Figure 6 Figure is a schematic diagram of the lubricating oil groove of the embodiment of the present application;
[0036] Figure 7 Figure is a schematic diagram of the first deformation example of the lubricating oil groove of the embodiment of the present application;
[0037] Figure 8 Figure is a schematic diagram of the second deformation example of the lubricating oil groove of the embodiment of the present application.
[0038] Figure is a schematic diagram of the second deformation example of the lubricating oil groove of the embodiment of the present application.
[0039] 001-lubricating oil groove; 100-box body; 101-first oil hole; 102-second oil hole; 103-annular sealing groove; 200-rotary table; 210-limiting step; 300-output gear shaft; 301-first end; 302-second end; 310-locking nut; 400-first knuckle bearing; 500-second knuckle bearing; 600-first screw plug; 700-second screw plug; 800-skeleton oil seal; 900-sealing ring; 910-annular folded edge. DETAILED DESCRIPTION
[0040] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.
[0041] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.
[0042] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0043] In the description of the utility model, it should be explained that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product is used, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.
[0044] In addition, if the terms "first", "second" and the like appear, they are only used for differentiation description, and cannot be understood as indicating or implying relative importance.
[0045] It should be noted that the features in the embodiments of the utility model can be combined with each other without conflict.
[0046] Please refer to Figures 1-8 The embodiment provides a gear box output structure, which comprises a box body 100, a rotating frame 200, an output gear shaft 300, a first joint bearing 400 and a second joint bearing 500. The rotating frame 200 is connected with the output gear shaft 300, and the two are relatively fixed in the circumferential direction of the output gear shaft 300; the rotating frame 200 or the output gear shaft 300 is rotatably matched with the box body 100 through the first joint bearing 400, and the output gear shaft 300 is rotatably matched with the box body 100 through the second joint bearing 500.
[0047] As described above, the working mode of the gear box output structure provided by the embodiment is as follows:
[0048] The output gear shaft 300 transmits torque to the rotating frame 200 to drive the rotating frame 200 to rotate. During the rotation of the output gear shaft 300, the first knuckle bearing 400 and the second knuckle bearing 500 are used to support and position the output gear shaft 300, so that the output gear shaft 300 rotates stably and reliably. Since the axial dimensions of the first knuckle bearing 400 and the second knuckle bearing 500 are small, the axial dimension of the gear box can be reduced, the weight of the gear box can be reduced, the miniaturization design of the gear box is facilitated, the assembly of the gear box is facilitated, and the manufacturing cost of the gear box is reduced. At the same time, the first knuckle bearing 400 and the second knuckle bearing 500 have strong bearing performance, low failure rate, long service life, good support effect, stable and reliable operation of the output gear shaft 300, and long service life.
[0049] The following embodiments illustrate the details of the gear box output structure provided in the present application by way of example.
[0050] Please refer to Figure 1 and Figure 2 In the present embodiment, the gear box output structure includes a box body 100, a rotating frame 200, an output gear shaft 300, a first knuckle bearing 400, a second knuckle bearing 500, a first screw plug 600, a second screw plug 700, a skeleton oil seal 800, and a sealing ring 900. The rotating frame 200 is sleeved on the first end 301 of the output gear shaft 300, and the rotating frame 200 and the output gear shaft 300 are relatively fixed in the circumferential direction of the output gear shaft 300. The rotating frame 200 or the output gear shaft 300 is rotatably connected to the box body 100 through the first knuckle bearing 400, and the output gear shaft 300 is rotatably connected to the box body 100 through the second knuckle bearing 500. The first screw plug 600 and the second screw plug 700 are both installed on the box body 100. The skeleton oil seal 800 is installed between the output gear shaft 300 and the box body 100 and is arranged close to the second end 302 of the output gear shaft 300. The first end 301 and the second end 302 are two ends of the output gear shaft 300 in the axial direction. The sealing ring 900 is sleeved outside the output gear shaft 300, and the outer edge of the sealing ring 900 is in contact with the end face of the box body 100 close to the second end 302.
[0051] In this way, the output gear shaft 300 is supported by the first knuckle bearing 400 and the second knuckle bearing 500, and the output gear shaft 300 operates stably and reliably with a long service life. The axial dimensions of the first knuckle bearing 400 and the second knuckle bearing 500 are small, thereby greatly compressing the axial space of the gear box, reducing the volume of the gear box, saving materials, and reducing manufacturing costs.
[0052] It should be understood that the inner ring of the first knuckle bearing 400 can be integrated on the turret 200 or the output gear shaft 300, and the inner ring of the first knuckle bearing 400 can also be provided in a split structure with the turret 200 or the output gear shaft 300, and the outer ring of the first knuckle bearing 400 can be provided in an integrated structure with the box body 100, or both are designed in a split structure. Similarly, the inner ring of the second knuckle bearing 500 can be integrated on the output gear shaft 300, and the inner ring of the second knuckle bearing 500 can also be provided in a split structure with the output gear shaft 300, and the outer ring of the second knuckle bearing 500 can be provided in an integrated structure with the box body 100, or both are designed in a split structure. The matching structure of the first knuckle bearing 400, the second knuckle bearing 500, the box body 100, the turret 200 and the output gear shaft 300 is flexibly selected according to the actual situation, and is not enumerated one by one in the embodiment.
[0053] Please refer to Figure 1 For example, in one embodiment, the inner ring of the first knuckle bearing 400 can be integrated on the turret 200, i.e. the inner ring of the first knuckle bearing 400 is provided in an integrated structure with the turret 200, and the outer ring of the first knuckle bearing 400 is provided in an integrated structure with the box body 100. At the same time, the inner ring of the second knuckle bearing 500 is provided in an integrated structure with the output gear shaft 300, and the outer ring of the second knuckle bearing 500 is provided in an integrated structure with the box body 100.
[0054] Please refer to Figure 3 In another embodiment, the inner ring of the first knuckle bearing 400 is provided in a split structure with the turret 200, and the turret 200 is provided with an annular limiting step 210, the inner ring of the first knuckle bearing 400 is sleeved outside the turret 200, and the side of the inner ring away from the second knuckle bearing 500 is in contact with the limiting step 210, and the axial position of the inner ring is limited by the limiting step 210 and the outer ring of the first knuckle bearing 400. The outer ring of the first knuckle bearing 400 is provided in a split structure with the box body 100. At the same time, the inner ring of the second knuckle bearing 500 is provided in an integrated structure with the output gear shaft 300, and the outer ring of the second knuckle bearing 500 is provided in an integrated structure with the box body 100.
[0055] Please refer to Figure 4In yet another embodiment, the inner ring of the first joint bearing 400 is arranged in a split design with the rotating frame 200, and the rotating frame 200 is provided with an annular limiting step 210. The inner ring of the first joint bearing 400 is sleeved outside the rotating frame 200, and the side of the inner ring away from the second joint bearing 500 is in contact with the limiting step 210. The axial position of the inner ring is limited by the limiting step 210 and the outer ring of the first joint bearing 400. The outer ring of the first joint bearing 400 is arranged in a split structure with the box body 100. Meanwhile, the inner ring of the second joint bearing 500 is arranged in a split structure with the output gear shaft 300, and the outer ring of the second joint bearing 500 is arranged in a split structure with the box body 100.
[0056] Please refer to Figure 5 In other embodiments, the inner ring of the first joint bearing 400 is arranged in a split design with the output gear shaft 300, and the output gear shaft 300 is externally screwed with a locking nut 310. The inner ring of the first joint bearing 400 is sleeved outside the output gear shaft 300, and the side of the inner ring away from the second joint bearing 500 is in contact with the locking nut 310. The axial position of the inner ring is limited by the locking nut 310 and the outer ring of the first joint bearing 400. The outer ring of the first joint bearing 400 is arranged in a split structure with the box body 100. Meanwhile, the inner ring of the second joint bearing 500 is arranged in a split structure with the output gear shaft 300, and the outer ring of the second joint bearing 500 is arranged in a split structure with the box body 100.
[0057] In this embodiment, the box body 100 is optionally provided with a first oil hole 101 and a second oil hole 102. The first oil hole 101 is used to guide lubricating oil to the first joint bearing 400, and the second oil hole 102 is used to guide lubricating oil to the second joint bearing 500. The first screw plug 600 seals the port of the first oil hole 101, and the second screw plug 700 seals the port of the second oil hole 102. Lubricating oil can be added or the lubricating oil in the box body 100 can be replaced from the first oil hole 101 and the second oil hole 102. The flowing of the lubricating oil in the first oil hole 101 and the second oil hole 102 can carry away the heat generated during the operation of the first joint bearing 400 and the second joint bearing 500, and the lubricating oil flowing through the first joint bearing 400 and the second joint bearing 500 can lubricate the bearings, reduce the wear speed of the joint bearings, and thus improve the wear resistance and service life.
[0058] It should be understood that the first oil hole 101 can be provided with a radial section and an axial section. The lubricating oil flowing in the axial section can cover the area of the first joint bearing 400 in the axial direction, and the lubricating effect is good. The second oil hole 102 is a radial hole, which can directly guide the lubricating oil to the area between the inner ring and the outer ring of the second joint bearing 500. Therefore, an oil delivery hole communicating with the second oil hole 102 can be provided on the outer ring of the second joint bearing 500.
[0059] Please combine Figures 6-8 In this embodiment, optionally, the outer surface of the inner ring of the first knuckle bearing 400 or the inner surface of the outer ring of the first knuckle bearing 400 is provided with a lubricating oil groove 001; the outer surface of the inner ring of the second knuckle bearing 500 or the inner surface of the outer ring of the second knuckle bearing 500 is provided with a lubricating oil groove 001. Specifically, the lubricating oil groove 001 can be provided on the outer surface of the inner ring of the first knuckle bearing 400 and the outer surface of the inner ring of the second knuckle bearing 500. Wherein, the lubricating oil groove 001 can be a strip-shaped groove or a grid-shaped groove, the shape of the lubricating oil groove 001 is designed as needed, flexible in processing and manufacturing, suitable for different scenes. In addition, the shapes of the lubricating oil grooves 001 located at different positions can be different, thereby further increasing the range of use.
[0060] It should be understood that in some embodiments, phosphating or film coating process can be adopted for the first knuckle bearing 400 or the second knuckle bearing 500, combined with the lubricating oil groove 001 designed on the surface of the inner ring or the outer ring, to reduce the heat of the raceway surface, effectively enhance the lubrication effect, and improve the service life of the knuckle bearing.
[0061] Optionally, the end surface of the box body 100 corresponding to the second end 302 is provided with an annular sealing groove 103, and the annular sealing groove surrounds the skeleton oil seal 800. Correspondingly, the sealing ring 900 is provided with an annular folded edge 910, which can be inserted into the annular sealing groove 103, thereby improving the sealing effect.
[0062] The gear box output structure provided in this embodiment supports the output gear shaft 300 through the cooperation of the first knuckle bearing 400 and the second knuckle bearing 500. The knuckle bearing has strong bearing capacity, low failure rate, good support effect, stable and reliable operation of the output gear shaft 300, and long service life. Moreover, the axial size of the knuckle bearing is small, which can reduce the axial size of the gear box, reduce the weight of the gear box, facilitate the miniaturization design of the gear box, and reduce the manufacturing cost.
[0063] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or replacements within the technical range disclosed in the present application can be easily thought of by those skilled in the art, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A gearbox output structure, characterized by, The gear box output structure comprises a box body (100), a rotating frame (200), an output gear shaft (300), a first joint bearing (400) and a second joint bearing (500), the rotating frame (200) is connected with the output gear shaft (300), and the two are fixed relative to each other in the circumferential direction of the output gear shaft (300), the rotating frame (200) or the output gear shaft (300) is rotatably connected with the box body (100) through the first joint bearing (400), and the output gear shaft (300) is rotatably connected with the box body (100) through the second joint bearing (500). The inner ring of the first joint bearing (400) is integrated on the rotating frame (200) or the output gear shaft (300), and the outer ring of the first joint bearing (400) is integrated on the box body (100). The inner ring of the second joint bearing (500) is integrated on the output gear shaft (300), and the outer ring of the second joint bearing (500) is integrated on the box body (100). A first oil hole (101) for guiding lubricating oil to the first joint bearing (400) is arranged on the box body (100). A second oil hole (102) for guiding lubricating oil to the second joint bearing (500) is arranged on the box body (100).
2. The gear box output structure according to claim 1, wherein: an outer surface of the inner ring of the first joint bearing (400) or an inner surface of the outer ring of the first joint bearing (400) is provided with a lubricating oil groove (001).
3. The gear box output structure according to claim 1, wherein: an outer surface of the inner ring of the second joint bearing (500) or an inner surface of the outer ring of the second joint bearing (500) is provided with a lubricating oil groove (001).
4. The gear box output structure according to claim 2 or 3, wherein: the lubricating oil groove (001) is provided in the form of a strip-shaped groove or a grid-shaped groove.