A gearbox with shock absorption and noise reduction functions
By introducing a buffer sealing sleeve and a limiting convex ring structure into the gearbox, combined with sound-absorbing tiles and reinforcing ribs, the vibration and noise problems during gearbox rotation are solved, achieving noise reduction and enhanced sealing, and improving the stability of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO MINGJING ELECTRONICS CO LTD
- Filing Date
- 2025-09-30
- Publication Date
- 2026-07-03
AI Technical Summary
The existing gearbox generates vibration and noise due to the high-speed rotation of the bearings, which causes the noise to be transmitted through the gearbox and affects the quiet operation of the equipment.
The system employs a buffer sealing sleeve and a limiting protruding ring structure. The buffer sealing sleeve absorbs the vibration of the rotating shaft, and the limiting protruding ring cooperates with the slot to prevent the vibration from being transmitted to the enclosure. At the same time, sound-absorbing tiles are installed on the outside of the enclosure to absorb noise and enhance the structural strength of the enclosure.
It effectively reduces the noise of the gearbox during operation, improves sealing and stability, and enhances the shock resistance and noise reduction of the gearbox.
Smart Images
Figure CN224453603U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gearbox technology, specifically to a gearbox with shock absorption and noise reduction functions. Background Technology
[0002] A gearbox is a core mechanical transmission device that efficiently transmits power from the input shaft to the output shaft, enabling speed change, torque increase, or direction reversal. Its core components consist of gear sets, shaft systems, and a housing. Through the meshing combination of gears with different numbers of teeth, the ratio of speed to torque is precisely adjusted to meet the diverse power requirements of equipment. Gearboxes are widely used in industrial manufacturing, new energy, and transportation: in wind turbine generators, they convert low-speed rotor rotation into high-speed electrical energy output; in automotive transmissions, they achieve smooth power switching through multi-stage gear engagement; and in construction machinery, they drive heavy-duty operations through high torque output.
[0003] In some existing technologies, for example, Chinese utility model patent CN216618476U discloses a gearbox, which includes a housing, a bearing assembly, a gear assembly, and a shim. The housing includes a first housing and a second housing arranged opposite to each other, and the housing has an internal receiving cavity. The bearing assembly is disposed in the receiving cavity and includes multiple pairs of bearings. The gear assembly is disposed in the receiving cavity and includes multiple gears that mesh sequentially. The gears are rotatably disposed in the receiving cavity through the paired bearings. The shim is disposed between the gears and the bearings for adjusting the axial clearance of the gears. The advantage of this gearbox is that it adopts a split structure, is lightweight, and does not require additional bearing caps, making it convenient to measure and adjust the axial clearance of the gears.
[0004] However, it is worth noting that in the aforementioned prior art, the gear set of the gearbox is mounted on the housing via a bearing assembly. When the gear set rotates, it rotates at high speed within the bearing assembly, causing slight vibrations due to the high-speed rotation of the bearings. The noise generated by these vibrations is transmitted outwards through the housing. Therefore, a gearbox with vibration damping and noise reduction functions is proposed. Utility Model Content
[0005] To address the aforementioned issues, a gearbox with vibration damping and noise reduction functions is provided. When the rotating shaft rotates, the buffer seal sleeve absorbs the vibration of the mounting tube, effectively preventing the vibration generated during shaft rotation from being transmitted to the lower and upper housings through the limiting ring and the buffer seal sleeve. This reduces the noise generated by vibration during gearbox operation and solves the problem of high gearbox noise.
[0006] To address the existing technical problems, this application provides a gearbox with shock absorption and noise reduction functions, including a lower housing, an upper housing disposed on the top of the lower housing, a gear set disposed inside the lower housing, and a sealing assembly disposed on the lower housing and the upper housing. The two sides of the top of the lower housing are symmetrically provided with first mounting grooves.
[0007] The upper box is fixed to the top of the lower box, and the two sides of the bottom of the upper box are symmetrically provided with second mounting slots, which correspond one-to-one with the first mounting slots.
[0008] The sealing assembly includes a fixing seat, which is fixed to the lower housing and the upper housing. A buffer sealing sleeve is installed on the fixing seat at the center of one side of the fixing seat.
[0009] The gear set includes a rotating shaft with gears fixed on it. Bearings are fixed at both ends of the rotating shaft and are embedded in the mounting tube.
[0010] As one technical solution of this application, a first slot is provided on the first mounting groove;
[0011] The second mounting slot is provided with a second slot, and the first slot and the second slot cooperate with each other;
[0012] A limiting protrusion is provided on the outer circumference of the buffer sealing sleeve, and the limiting protrusion is installed in both the first and second slots.
[0013] As one technical solution of this application, a limiting clamp is installed at one end of the rotating shaft, and the limiting clamp is used to limit the movement of the convex ring along the central axis of the rotating shaft.
[0014] As one technical solution of this application, a number of first sound-absorbing tiles that can absorb noise generated during vibration are fixed on the outer wall of the lower housing.
[0015] As one technical solution of this application, a second sound-absorbing tile is fixed to the outside of the upper housing to absorb the noise generated when it vibrates.
[0016] As one technical solution of this application, a number of first reinforcing ribs are also longitudinally fixed on the outer side wall of the lower box, and the first reinforcing ribs are used to increase the strength of the lower box.
[0017] As one technical solution of this application, a number of second reinforcing ribs are longitudinally fixed on the outer side wall of the upper box, and the second reinforcing ribs are used to increase the strength of the upper box.
[0018] The advantages of this utility model compared to the prior art are:
[0019] 1. This application uses a buffer sealing sleeve fitted onto the mounting tube to separate the mounting tube from the first and second mounting grooves, preventing direct contact between the mounting tube and the first and second mounting grooves. The end of the rotating shaft is then installed inside the mounting tube via a limiting protrusion ring. When the rotating shaft rotates, the buffer sealing sleeve absorbs vibrations from the mounting tube, effectively preventing vibrations generated during shaft rotation from being transmitted to the lower and upper housings through the limiting protrusion ring and the buffer sealing sleeve. This reduces noise generated by vibration during gearbox operation and solves the problem of high gearbox noise.
[0020] 2. This application provides a limiting protrusion ring on the outer surface of the buffer sealing sleeve, and then installs the limiting protrusion ring in the first and second retaining grooves. At this time, the limiting protrusion ring is in close contact with the inner walls of the first mounting groove and the first retaining groove, effectively preventing oil leakage from the gearbox. This improves the gearbox's sealing performance.
[0021] 3. This application, by mounting a limiting clamp on the rotating shaft, enables the limiting clamp to limit the limiting protrusion ring, effectively preventing the limiting protrusion ring from moving in the opposite direction along the central axis of the rotating shaft when it rotates. This ensures that the rotating shaft always remains in a stable working state. Attached Figure Description
[0022] Figure 1 This is a 3D diagram of a gearbox with shock absorption and noise reduction functions.
[0023] Figure 2 This is a three-dimensional view of the lower and upper housings of a gearbox with shock absorption and noise reduction functions.
[0024] Figure 3 An exploded view of a gearbox with shock absorption and noise reduction functions.
[0025] Figure 4 This is a schematic diagram of the internal structure of the lower housing of a gearbox with shock absorption and noise reduction functions.
[0026] Figure 5 This is a three-dimensional view of a sealing component in a gearbox with shock absorption and noise reduction functions.
[0027] Figure 6 This is an exploded view of a sealing component in a gearbox with shock absorption and noise reduction functions.
[0028] Figure 7 This is a partial structural diagram of the upper box.
[0029] The following are the labels in the diagram: 1. Lower housing; 11. First mounting groove; 12. First slot; 13. First reinforcing rib; 2. Upper housing; 21. Second mounting groove; 22. Second slot; 23. Second reinforcing rib; 3. Gear set; 31. Rotating shaft; 32. Gear; 4. Sealing assembly; 41. Fixing seat; 411. Mounting tube; 43. Buffer sealing sleeve; 44. Limiting protrusion ring; 45. Bearing; 46. Limiting clamp; 5. First sound-absorbing tile; 6. Second sound-absorbing tile. Detailed Implementation
[0030] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.
[0031] See Figures 1-7 As shown, a gearbox with shock absorption and noise reduction function includes a lower housing 1, an upper housing 2 disposed on the top of the lower housing 1, a gear set 3 disposed inside the lower housing 1, and a sealing assembly 4 disposed on the lower housing 1 and the upper housing 2. The two sides of the top of the lower housing 1 are symmetrically provided with first mounting grooves 11.
[0032] The top of the lower box 1 is fixed with the upper box 2. The bottom of the upper box 2 is symmetrically provided with the second mounting groove 21 on both sides, and the second mounting groove 21 corresponds one-to-one with the first mounting groove 11.
[0033] The sealing assembly 4 includes a fixing seat 41, which is fixed on the lower housing 1 and the upper housing 2. A buffer sealing sleeve 43 is installed on the fixing seat 41 at the center of one side of the fixing seat 41.
[0034] The gear set 3 includes a rotating shaft 31, on which a gear 32 is fixed. Bearings 45 are fixed at both ends of the rotating shaft 31, and the bearings 45 are embedded in the mounting tube 411.
[0035] By fitting a buffer sealing sleeve 43 onto the mounting tube 411, the buffer sealing sleeve 43 separates the mounting tube 411 from the first mounting groove 11 and the second mounting groove 21, preventing direct contact between the mounting tube 411 and the first mounting groove 11 and the second mounting groove 21. Then, the end of the rotating shaft 31 is installed inside the mounting tube 411 via a limiting protrusion ring 44. When the rotating shaft 31 rotates, the buffer sealing sleeve 43 absorbs the vibration of the mounting tube 411, effectively preventing the vibration generated when the rotating shaft 31 rotates from being transmitted to the lower housing 1 and the upper housing 2 through the limiting protrusion ring 44 and the buffer sealing sleeve 43. This reduces the noise generated by vibration during gearbox operation and solves the problem of high gearbox noise.
[0036] See Figure 2 , Figure 3 and Figure 4As shown, a first slot 12 is provided on the first mounting slot 11;
[0037] The second mounting slot 21 is provided with a second slot 22, and the first slot 12 and the second slot 22 cooperate with each other;
[0038] A limiting protrusion ring 44 is provided on the outer circumferential surface of the buffer sealing sleeve 43, and the limiting protrusion ring 44 is installed in both the first slot 12 and the second slot 22.
[0039] By setting a limiting protrusion 44 on the outer surface of the buffer sealing sleeve 43, and then installing the limiting protrusion 44 in the first slot 12 and the second slot 22, the limiting protrusion 44 is in close contact with the inner walls of the first mounting groove 11 and the first slot 12, effectively preventing oil leakage from the gearbox. This improves the sealing performance of the gearbox.
[0040] See Figure 2 , Figure 3 and Figure 4 As shown, a limiting clamp 46 is installed at one end of the rotating shaft 31. The limiting clamp 46 is used to limit the movement of the protruding ring 44 along the central axis of the rotating shaft 31.
[0041] To prevent displacement of the limiting protrusion 44, a limiting clamp 46 is installed on the rotating shaft 31, allowing the limiting clamp 46 to limit the limiting protrusion 44 and effectively preventing it from moving in the opposite direction along the central axis of the rotating shaft 31 when the rotating shaft 31 rotates. This ensures that the rotating shaft 31 is always in a stable working state.
[0042] See Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, several first sound-absorbing tiles 5, which can absorb noise generated during vibration, are fixed on the outer wall of the lower housing 1.
[0043] By fixing several first sound-absorbing tiles 5 to the outside of the lower housing 1, the first sound-absorbing tiles 5 can absorb the noise generated by the vibration of the lower housing 1 during operation, thereby reducing the noise of the lower housing 1.
[0044] See Figure 1 , Figure 2 and Figure 3 As shown, a second sound-absorbing tile 6 is fixed to the outside of the upper housing 2 to absorb the noise generated when it vibrates.
[0045] By fixing several second sound-absorbing tiles 6 to the surface of the upper housing 2, the second sound-absorbing tiles 6 can absorb the noise generated by the vibration of the upper housing 2 during operation, thereby reducing the noise of the upper housing 2.
[0046] See Figure 1 , Figure 2 and Figure 3 As shown, several first reinforcing ribs 13 are also longitudinally fixed on the outer side wall of the lower box 1. The first reinforcing ribs 13 are used to increase the strength of the lower box 1.
[0047] To improve the strength of the lower housing 1, several first reinforcing ribs 13 are longitudinally fixed to the outer side wall of the lower housing 1. The first reinforcing ribs 13 are perpendicular to the side wall of the lower housing 1, so that the first reinforcing ribs 13 can effectively increase the strength of the side wall of the lower housing 1. This effectively prevents the lower housing 1 from deforming when it is subjected to a collision.
[0048] See Figure 1 , Figure 2 and Figure 3 As shown, several second reinforcing ribs 23 are longitudinally fixed on the outer side wall of the upper box 2. The second reinforcing ribs 23 are used to increase the strength of the upper box 2.
[0049] To improve the strength of the upper housing 2, several second reinforcing ribs 23 are fixed to the outer side wall of the upper housing 2. The second reinforcing ribs 23 are perpendicular to the side wall of the upper housing 2, so that the second reinforcing ribs 23 can effectively increase the strength of the side wall of the upper housing 2. This effectively prevents the upper housing 2 from deforming when it is subjected to a collision.
[0050] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.
Claims
1. A gearbox with shock absorption and noise reduction function, comprising a lower housing (1), an upper housing (2) disposed on the top of the lower housing (1), a gear set (3) disposed inside the lower housing (1), and a sealing assembly (4) disposed on the lower housing (1) and the upper housing (2), characterized in that, The lower housing (1) has first mounting slots (11) symmetrically opened on both sides of the top. The upper housing (2) has symmetrical second mounting slots (21) on both sides of its bottom, and the second mounting slots (21) correspond one-to-one with the first mounting slots (11); The sealing assembly (4) includes a fixing seat (41), which is fixed on the lower box (1) and the upper box (2). A buffer sealing sleeve (43) is installed on the center of one side of the fixing seat (41). The gear set (3) includes a rotating shaft (31), a gear (32) is fixed on the rotating shaft (31), and bearings (45) are fixed at both ends of the rotating shaft (31). The bearings (45) are embedded in the mounting tube (411).
2. The gear box with shock-absorbing and noise-reducing functions according to claim 1, characterized in that, The first mounting slot (11) is provided with a first card slot (12); The second mounting slot (21) is provided with a second slot (22), and the first slot (12) and the second slot (22) cooperate with each other; The buffer sealing sleeve (43) is provided with a limiting protrusion ring (44) on its outer circumference. The limiting protrusion ring (44) is installed in both the first slot (12) and the second slot (22).
3. The gear box with shock-absorbing and noise-reducing functions according to claim 1, characterized in that, One end of the rotating shaft (31) is equipped with a limiting clamp (46), which is used to limit the movement of the protruding ring (44) along the central axis of the rotating shaft (31).
4. The gear box with shock-absorbing and noise-reducing functions according to claim 1, characterized in that, Several first sound-absorbing tiles (5) that can absorb noise generated during vibration are fixed on the outer wall of the lower housing (1).
5. The gear box with shock-absorbing and noise-reducing functions according to claim 1, characterized in that, The upper housing (2) is fixed to the outside with a second sound-absorbing tile (6) for absorbing noise generated when it vibrates.
6. The gear box with shock-absorbing and noise-reducing functions according to claim 1, characterized in that, Several first reinforcing ribs (13) are also longitudinally fixed on the outer side wall of the lower box (1). The first reinforcing ribs (13) are used to increase the strength of the lower box (1).
7. The gear box with shock-absorbing and noise-reducing functions according to claim 1, characterized in that, Several second reinforcing ribs (23) are longitudinally fixed on the outer side wall of the upper box (2). The second reinforcing ribs (23) are used to increase the strength of the upper box (2).