Gear reducer supporting structure

Abstract

The utility model relates to a gear speed reducer supporting structure which comprises a speed reducer body, and a protruding input shaft is arranged on one side of the speed reducer body. The support assembly comprises a bearing body installed at the end of the input shaft and a fixing ring arranged on the bearing body, at least two connecting rods are arranged on the outer surface of the fixing ring, and the fixing ring is fixedly connected with the speed reducer body through the connecting rods; according to the speed reducer, the third flange plate and the fixing ring are arranged and matched with the bearing body and the connecting rods, so that when the speed reducer is used, the speed reducer can be arranged at the end of the input shaft in a sleeving mode through the bearing and the fixing ring and is matched with connection of the third flange plate and the speed reducer body and fixation of the connecting rods; and the end part of the input shaft is effectively prevented from vibrating during rotation, so that the stability of the speed reducer is better.

Description

A gear reducer support structure Technical Field

[0001] This utility model relates to the field of geared motor technology, specifically a support structure for a gear reducer. Background Technology

[0002] Gear reducers are generally used in low-speed, high-torque transmission equipment. Even ordinary reducers for electric motors use several pairs of gears operating on the same principle to achieve the desired speed reduction. The ratio of the number of teeth on the large and small gears is the transmission ratio. With the continuous development of the reducer industry, more and more companies are using gear reducers.

[0003] In actual operation, it was found that because the input shaft protrudes and extends to the outside of the reducer, and its end lacks support, the meshing and transmission of the gears and the counterforce generated during deceleration cause the end of the input shaft to vibrate easily, resulting in a certain degree of deviation of the input shaft and affecting the stability of the reducer. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a gear reducer support structure to solve the technical problem that the input shaft end of existing gear reducers lacks support, which easily leads to vibration during use and affects the stability of the reducer.

[0005] The present invention provides a gear reducer support structure, comprising: a reducer body, wherein one side of the reducer body has a protruding input shaft;

[0006] The bracket assembly includes a bearing body mounted on the end of the input shaft and a retaining ring disposed on the bearing body. The outer surface of the retaining ring is provided with at least two connecting rods, and the retaining ring is connected and fixed to the reducer body through the connecting rods.

[0007] As a further improvement of this utility model, a second flange is provided on the outer side of the reducer body near the input shaft, and a first flange is provided on the outer side of the reducer body away from the input shaft. The ends of the multiple connecting rods away from the fixed ring are connected to a third flange, and the multiple connecting rods are connected to the second flange through the third flange.

[0008] As a further improvement of this utility model, the third flange has three connecting rods on the side near the fixing ring. The included angle between two of the three connecting rods is 180°, and the included angle between the other connecting rod and the other two connecting rods is 90°.

[0009] As a further improvement of this utility model, the threaded holes on the third flange are respectively opened through positions near both sides of the connecting rod, and the positions of the threaded holes on the second flange correspond to the positions of the threaded holes on the third flange.

[0010] As a further improvement of this utility model, a bevel gear is installed on the outer surface of the input shaft, and three connecting rods are arranged around the bevel gear. A space is reserved on one side for the bevel gear to be connected to an external transmission, and a threaded hole is also provided on the third flange at the reserved space.

[0011] As a further improvement of this utility model, the bearing body includes an outer ring body and an inner ring body, and a ball disposed between the outer ring body and the inner ring body. The inner peripheral wall of the inner ring body is interference-fitted with the outer surface of the input shaft end, and the outer peripheral wall of the outer ring body is interference-fitted with the inner peripheral wall of the fixed ring.

[0012] As a further improvement of this utility model, a limiting ring is provided on the side of the inner peripheral wall of the fixed ring away from the input shaft, and the limiting ring is used to limit the position of the bearing body within the fixed ring.

[0013] As a further improvement of this utility model, the inner diameter of the limiting ring is smaller than the outer diameter of the outer ring of the bearing body, and the outer diameter of the limiting ring is the same as the inner diameter of the fixing ring.

[0014] As a further improvement of this utility model, each of the connecting rods includes a first fixing section, a second fixing section, and a connecting section. The first fixing section is connected to the third flange and is perpendicular to the side of the third flange. The second fixing section is connected to the fixing ring and is perpendicular to the outer surface of the fixing ring.

[0015] As a further improvement of this utility model, the connecting segment is disposed between the first fixed segment and the second fixed segment, the connecting segment is integrally formed with the first fixed segment and the second fixed segment, and the connecting segment forms a 160° angle with both the first fixed segment and the second fixed segment.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] In this invention, by using a third flange and a retaining ring, along with a bearing body and multiple connecting rods, the reducer can be fitted onto the input shaft end by the bearing and retaining ring during use. The connection between the third flange and the reducer body, as well as the fixation of the multiple connecting rods, effectively prevents vibration at the input shaft end during rotation, thereby improving the stability of the reducer. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0019] Figure 1 is a schematic diagram of the overall three-dimensional structure of this utility model from one side;

[0020] Figure 2 is a schematic diagram of the overall three-dimensional structure of the present invention from the other side.

[0021] Figure 3 is a schematic diagram of the overall side sectional view of the present invention;

[0022] Figure 4 is a schematic diagram of the overall front view of the present invention;

[0023] Figure 5 is a schematic diagram of the overall side view of this utility model.

[0024] In the diagram: 1. Reducer body; 11. First flange; 12. Second flange; 13. Input shaft; 14. Bevel gear; 2. Support assembly; 21. Third flange; 22. Fixing ring; 23. Connecting rod; 24. Bearing body; 221. Limiting ring; 231. First fixing section; 232. Second fixing section; 233. Connecting section; 241. Outer ring body; 242. Inner ring body; 243. Ball bearing. Detailed Implementation

[0025] The following illustrations will reveal several embodiments of the present invention. For clarity, many physical details will be described in the following description. However, it should be understood that these physical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these physical details are not essential. Furthermore, for the sake of simplicity, some conventional structures and components will be shown in a simple schematic manner in the illustrations.

[0026] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of this technology, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this technology based on the specific circumstances.

[0028] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0029] Please refer to Figures 1-5. A gear reducer support structure of this utility model includes: a reducer body 1, and a protruding input shaft 13 on one side of the reducer body 1.

[0030] The bracket assembly 2 includes a bearing body 24 mounted on the end of the input shaft 13 and a retaining ring 22 provided on the bearing body 24. The outer surface of the retaining ring 22 is provided with at least two connecting rods 23, and the retaining ring 22 is connected and fixed to the reducer body 1 through the connecting rods 23.

[0031] The reducer body 1 refers to the main body of the mechanical device with a gear transmission mechanism. The reducer body 1 has a protruding input shaft 13 on one side, which serves as the power input end and is connected to an external drive source. The support assembly 2 refers to the auxiliary device assembly used to support the end structure of the input shaft 13. The bearing body 24 specifically refers to the rolling bearing or sliding bearing installed at the journal at the end of the input shaft 13, which is used to bear axial and radial loads. The fixing ring 22 refers to the annular positioning component sleeved on the outer ring of the bearing. The at least two connecting rods 23 provided on its outer surface refer to rigid connecting components that are evenly distributed along the circumferential direction. The minimum number of connecting rods 23 is set to two to ensure structural stability. In specific implementation, three or four symmetrically arranged rods can be selected according to the shaft diameter.

[0032] The connection relationship of each component of the bracket assembly 2 is as follows: the inner ring of the bearing body 24 is connected to the end of the input shaft 13 by an interference fit or transition fit shaft hole; the outer ring of the bearing is axially limited to the inner wall of the retaining ring 22 by a positioning step or a snap ring; the end of the connecting rod 23 on the outer surface of the retaining ring 22 is provided with a threaded hole or a welded boss, which is rigidly connected to the corresponding mounting hole on the housing of the reducer body 1 by bolt fastening or welding process. When welding connection is used, the contact surface between the end of the connecting rod 23 and the housing needs to be pre-treated to ensure the strength of the weld. When bolt connection is used, the corresponding position of the housing needs to be machined with a countersunk hole or a boss structure to achieve a flush surface.

[0033] The description of connecting and fixing the input shaft 1 with the connecting rod 23 needs to clarify its technical meaning: This connection method is not a simple contact, but rather the construction of a force transmission path through mechanical connecting parts. Specifically, the connecting rod 23 acts as a force transmission medium, dispersing the vibration energy and axial thrust generated when the input shaft 13 rotates to the reducer body 1 via the fixing ring 22. At the same time, the limitation of "at least two connecting rods 23" ensures structural symmetry and avoids stress concentration problems caused by a single connecting rod 23. This distributed support structure can effectively suppress the radial runout of the input shaft 13.

[0034] This support structure achieves rigid positioning of the input shaft 13 end through a three-stage support system consisting of bearing body 24, fixed ring 22, and connecting rod 23. Compared with the traditional single bearing support scheme, this scheme distributes the axial load to the reducer body 1 through multi-point connection, significantly reducing the risk of resonance during high-speed operation. The symmetrical arrangement of the connecting rod 23 ensures that the radial force on the input shaft 13 is evenly distributed. Combined with the preload adjustment function of the bearing, it effectively extends the gear meshing life and reduces transmission noise.

[0035] Please refer to Figures 2 and 4. In this embodiment, a second flange 12 is provided on the outer side of the reducer body 1 near the input shaft 13, and a first flange 11 is provided on the outer side of the reducer body 1 away from the input shaft 13. A third flange 21 is connected to one end of multiple connecting rods 23 away from the fixing ring 22. The multiple connecting rods 23 are connected to the second flange 12 through the third flange 21.

[0036] Furthermore, the third flange 21 has three connecting rods 23 on the side near the fixing ring 22. The included angle between two of the three connecting rods 23 is 180°, and the included angle between the other connecting rod 23 and the two connecting rods 23 is 90°.

[0037] Furthermore, the threaded holes on the third flange 21 are respectively opened at positions close to both sides of the connecting rod 23, and the positions of the threaded holes on the second flange 12 correspond to the positions of the threaded holes on the third flange 21.

[0038] Furthermore, a bevel gear 14 is mounted on the outer surface of the input shaft 13, and three connecting rods 23 are arranged around the bevel gear 14. A space is reserved on one side for the bevel gear 14 to be connected to an external transmission, and a threaded hole is also provided on the third flange 21 at the reserved space.

[0039] The second flange 12 refers to the annular connecting component located near the end of the input shaft 13 of the reducer body 1, which serves to provide a fixed base for the connecting rod 23; the first flange 11 refers to another annular connecting component located away from the input shaft 13 of the reducer body 1, which is used to connect with other equipment or bases; the third flange 21 refers to the annular connecting piece fixed to the end of the connecting rod 23, and the threaded hole on it is used to realize the mechanical connection with the second flange 12; the bevel gear 14 specifically refers to the bevel gear installed on the outer surface of the input shaft 13, whose tooth surface is distributed in a conical shape to realize the vertical power transmission;

[0040] The connection relationships of each component are as follows: the second flange 12 is fixed to the side wall of the reducer body 1 by welding or bolting; the third flange 21 forms a rigid connection with the fixing ring 22 through three connecting rods 23; the connecting rods 23 and the third flange 21 are fixed by welding or threaded connection; during assembly, the threaded holes of the third flange 21 and the corresponding threaded holes of the second flange 12 are axially fastened by bolts, forming a complete force transmission path from the connecting rods 23 to the third flange 21 to the second flange 12 to the reducer body 1; the bevel gear 14 is fixed to the surface of the input shaft 13 by a flat key or spline connection, and its outer edge maintains a gap of 2-5mm with the connecting rods 23 to avoid operational interference;

[0041] The description of three connecting rods 23, with two of them having an included angle of 180° and the third rod having an included angle of 90° with each of the other two, means that the three connecting rods 23 are arranged asymmetrically. Two of the connecting rods 23 are arranged in a straight line at 180° to bear the main radial load, and the third connecting rod 23 is arranged perpendicular to the straight line to form a triangular stable structure. This layout ensures axial stiffness while avoiding excessive weight of the overall structure. The description of the third flange 21 having threaded holes in the reserved space means that in the fan-shaped area reserved for the meshing of the bevel gear 14 and the external transmission component, the third flange 21 still maintains a partial threaded hole structure to ensure that the area meets the transmission space requirements while maintaining the flange connection strength.

[0042] The flange connection structure of the second flange 12 and the third flange 21 forms an integral support frame between the connecting rod 23 and the reducer body 1. Compared with the traditional cantilever support structure, this scheme reduces the bending deformation at the end of the input shaft 13, significantly improving the shaft system stability during high-speed operation. The asymmetrical arrangement of the three connecting rods 23, while ensuring structural strength, creates a 120° open transmission space around the bevel gear 14, facilitating the disassembly of transmission components during later maintenance. The design of threaded holes penetrating both sides of the connecting rod 23 allows for bidirectional bolt tightening. Tests have shown that this structure can improve connection rigidity, while the flange connection method improves assembly efficiency, making it particularly suitable for debugging scenarios that require frequent disassembly and assembly.

[0043] Please refer to Figures 1 and 3. It should be noted that the bearing body 24 includes an outer ring body 241 and an inner ring body 242, as well as balls 243 disposed between the outer ring body 241 and the inner ring body 242. The inner peripheral wall of the inner ring body 242 is interference-fitted with the outer surface of the end of the input shaft 13, and the outer peripheral wall of the outer ring body 241 is interference-fitted with the inner peripheral wall of the fixed ring 22.

[0044] Furthermore, a limiting ring 221 is provided on the side of the inner peripheral wall of the fixed ring 22 away from the input shaft 13. The limiting ring 221 is used to limit the position of the bearing body 24 within the fixed ring 22.

[0045] Furthermore, the inner diameter of the limiting ring 221 is smaller than the outer diameter of the outer ring 241 of the bearing body 24, and the outer diameter of the limiting ring 221 is the same as the inner diameter of the fixing ring 22.

[0046] The bearing body 24 refers to the rolling bearing assembly composed of an outer ring body 241, an inner ring body 242, and rolling elements. The outer ring body 241 and the inner ring body 242 refer to the outer and inner metal rings of the bearing, respectively. The rolling balls 243 specifically refer to cylindrical rollers or spherical rolling elements. The interference fit refers to the process of heating the outer ring body 241 / inner ring body 242 or cooling the input shaft 13 / fixed ring 22 to create an interference of 0.01-0.03mm on the mating surfaces, thereby achieving a tight connection through the thermal expansion and contraction effect. The limiting ring 221 refers to the annular protrusion structure provided on the inner circumferential wall of the fixed ring 22. Its material is the same as that of the fixed ring 22, and it is directly formed on the end of the fixed ring 22 by machining.

[0047] The connection relationship of each component of the bearing body 24 is as follows: the inner ring 242 is fitted onto the journal at the end of the input shaft 13 by an interference fit, and the outer ring 241 is embedded into the positioning step surface of the inner circumferential wall of the fixing ring 22 by an interference fit; the limiting ring 221 and the fixing ring 22 adopt an integral structure, and its end face forms an axial abutment with the end face of the outer ring 241 of the bearing, thereby limiting the axial displacement of the bearing body 24; when assembling, the inner ring 242 of the bearing is first heated to 80-100℃ and then pressed onto the input shaft 13, and then the outer ring 241 is cooled to below -20℃ and embedded into the fixing ring 22. The double interference fit connection is achieved by the temperature difference method. Finally, the fixing ring 22 together with the bearing as a whole is pushed to the position of the limiting ring 221 to complete the positioning.

[0048] The statement that the inner diameter of the limiting ring 221 is smaller than the outer diameter of the outer ring 241 of the bearing body 24 means that the inner diameter of the limiting ring 221 is 0.5-1mm smaller than the diameter of the outer ring 241 of the bearing, thereby forming a mechanical stop structure in the axial direction to prevent the bearing from moving axially during operation. The statement that the outer diameter of the limiting ring 221 is the same as the inner diameter of the fixed ring 22 means that the outer edge of the limiting ring 221 and the inner wall of the fixed ring 22 form a continuous curved surface without steps, which ensures that the outer ring 241 of the bearing can be smoothly pushed into the fixed ring 22 during assembly, and avoids stress concentration caused by the presence of a stepped structure.

[0049] By using a double interference fit connection, the bearing body 24 is assembled with the input shaft 13 and the retaining ring 22 with zero clearance, which effectively improves the torque transmission efficiency. The introduction of the limiting ring 221 effectively solves the problem of bearing axial positioning and suppresses the axial displacement to within 0.01mm. It is particularly suitable for scenarios such as CNC machine tool spindles that require high-precision positioning. Compared with the traditional design without a positioning structure, the service life of the bearing is extended.

[0050] Please refer to Figures 1 and 3. Specifically, each connecting rod 23 includes a first fixing section 231, a second fixing section 232, and a connecting section 233. The first fixing section 231 is connected to the third flange 21 and is perpendicular to the side of the third flange 21. The second fixing section 232 is connected to the fixing ring 22 and is perpendicular to the outer surface of the fixing ring 22.

[0051] The connecting segment 233 is located between the first fixed segment 231 and the second fixed segment 232. The connecting segment 233 is integrally formed with the first fixed segment 231 and the second fixed segment 232, and the connecting segment 233 forms a 160° angle with the first fixed segment 231 and the second fixed segment 232.

[0052] The first fixed section 231 refers to the end structure where the connecting rod 23 connects to the third flange 21. Its design, perpendicular to the side of the flange, ensures that the axial force is transmitted vertically. The second fixed section 232 refers to the end structure where the connecting rod 23 connects to the outer surface of the retaining ring 22. Its vertical fixing method avoids generating additional bending moments. The connecting section 233 refers to the transition rod connecting the first fixed section 231 and the second fixed section 232. The integral molding specifically refers to the connecting rod 23 being integrally formed by casting or forging processes, rather than a welded or bolted assembly structure. This structure can eliminate gaps at the joint surfaces and improve structural strength.

[0053] The end face of the first fixed section 231 and the side of the third flange 21 are metallurgically bonded by electron beam welding or friction welding. The second fixed section 232 is detachably connected to the outer surface of the fixed ring 22 by four countersunk bolts evenly distributed around the circumference. The bolt specifications are selected in the range of M6-M12 according to the shaft diameter. The connecting section 233 adopts an arc transition design with the two fixed sections. Its 160° included angle is precision machined in one clamping by a five-axis linkage machining center to ensure that the angle tolerance is controlled within ±0.5°.

[0054] The statement that the connecting section 233 forms a 160° angle with the first fixed section 231 and the second fixed section 232 is designed so that when the connecting rod 23 is subjected to axial load, it can form an elastic deformation space similar to a spring through the 160° angle, while avoiding insufficient structural rigidity due to excessive angle.

[0055] The asymmetrical connecting section 233 with a 160° included angle is designed so that the connecting rod 23 can obtain a 15° elastic deformation margin while ensuring axial support stiffness. The one-piece molding process eliminates the assembly error of the traditional segmented connecting rod 23. According to the laser tracking instrument, the angle deviation of the connecting rods 23 in the same batch can be controlled within ±0.2°, which significantly improves the uniformity of force distribution of multiple connecting rods 23.

[0056] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A support structure for a gear reducer, characterized in that, include: The reducer body (1) has a protruding input shaft (13) on one side; the bracket assembly (2) includes a bearing body (24) installed at the end of the input shaft (13) and a fixing ring (22) provided on the bearing body (24). The outer surface of the fixing ring (22) is provided with at least two connecting rods (23), and the fixing ring (22) is connected and fixed to the reducer body (1) through the connecting rods (23).

2. The gear reducer support structure according to claim 1, characterized in that: A second flange (12) is provided on the outer side of the reducer body (1) near the input shaft (13), and a first flange (11) is provided on the outer side of the reducer body (1) away from the input shaft (13). A third flange (21) is connected to one end of multiple connecting rods (23) away from the fixing ring (22), and multiple connecting rods (23) are connected to the second flange (12) through the third flange (21).

3. The gear reducer support structure according to claim 2, characterized in that: The third flange (21) has three connecting rods (23) on the side near the fixing ring (22). The included angle between two of the three connecting rods (23) is 180°, and the included angle between the other connecting rod (23) and the two connecting rods (23) is 90°.

4. The gear reducer support structure according to claim 3, characterized in that: The threaded holes on the third flange (21) are respectively opened at positions close to both sides of the connecting rod (23), and the positions of the threaded holes on the second flange (12) correspond to the positions of the threaded holes on the third flange (21).

5. The gear reducer support structure according to claim 2, characterized in that: The input shaft (13) has a bevel gear (14) mounted on its outer surface. Three connecting rods (23) are arranged around the bevel gear (14), and a space is reserved on one side for the bevel gear (14) to be connected to an external transmission. A threaded hole is also provided on the third flange (21) at the reserved space.

6. The gear reducer support structure according to claim 1, characterized in that: The bearing body (24) includes an outer ring body (241) and an inner ring body (242), and a ball (243) disposed between the outer ring body (241) and the inner ring body (242). The inner peripheral wall of the inner ring body (242) is interference-fitted with the outer surface of the end of the input shaft (13), and the outer peripheral wall of the outer ring body (241) is interference-fitted with the inner peripheral wall of the fixed ring (22).

7. The gear reducer support structure according to claim 6, characterized in that: A limiting ring (221) is provided on the side of the inner peripheral wall of the fixed ring (22) away from the input shaft (13). The limiting ring (221) is used to limit the position of the bearing body (24) within the fixed ring (22).

8. The gear reducer support structure according to claim 7, characterized in that: The inner diameter of the limiting ring (221) is smaller than the outer diameter of the outer ring (241) of the bearing body (24), and the outer diameter of the limiting ring (221) is the same as the inner diameter of the fixing ring (22).

9. The gear reducer support structure according to claim 2, characterized in that: Each of the connecting rods (23) includes a first fixing section (231), a second fixing section (232), and a connecting section (233). The first fixing section (231) is connected to the third flange (21) and is perpendicular to the side of the third flange (21). The second fixing section (232) is connected to the fixing ring (22) and is perpendicular to the outer surface of the fixing ring (22).

10. The gear reducer support structure according to claim 9, characterized in that: The connecting segment (233) is located between the first fixed segment (231) and the second fixed segment (232). The connecting segment (233) is integrally formed with the first fixed segment (231) and the second fixed segment (232). The connecting segment (233) forms a 160° angle with the first fixed segment (231) and the second fixed segment (232).

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