Noise reducing sealed planetary gear reduction box

Abstract

The utility model discloses a have the combination planetary gear reduction box of sealing of noise reduction, belong to gear reduction box technical field, including shell, planetary gear, sealing plate and pivot, planetary gear reduction box still includes fixed in the inner wall of shell's inner noise reduction ring, the sealing ring of clamping between shell and sealing plate and be used for the fixed mechanism of locking shell and sealing plate, and the fixed mechanism includes the lock body no.

Description

Technical Field

[0001] This utility model relates to the field of gear reducer technology, and in particular to a planetary gear reducer with a noise reduction and sealing combination. Background Technology

[0002] Planetary gear reducers are core components in the field of mechanical transmission. They are widely used due to their large transmission ratio, strong load-bearing capacity, and compact structure. However, during the operation of a planetary gear reducer, the high-speed meshing of the internal gears inevitably generates vibration and mechanical noise. This noise not only affects the overall operational stability of the equipment but also has an adverse impact on the surrounding working environment.

[0003] In addition, in order to ensure the normal lubrication and heat dissipation of the gear mechanism, the gearbox needs to be filled with lubricating oil. This places high demands on the sealing performance of the gearbox. If the sealing structure of the existing gearbox is not properly designed at the joint between the outer shell and the end cover, lubricating oil leakage will occur. Leakage not only pollutes the equipment and environment, but also aggravates gear wear due to insufficient lubrication. At the same time, external dust and moisture will also invade the inside of the gearbox, further damaging the service life and transmission accuracy of the gearbox.

[0004] Therefore, this utility model proposes a planetary gear reducer with noise reduction and sealing combination to overcome the shortcomings of the prior art. Utility Model Content

[0005] In view of the problems of high operating noise, poor sound insulation, poor sealing at the joints of the gearbox, and cumbersome and time-consuming disassembly and maintenance in the existing planetary gear reducers, this utility model aims to provide a planetary gear reducer with a noise reduction and sealing combination that has been improved in structure and can effectively solve the above problems.

[0006] This utility model provides a planetary gear reducer with noise reduction and sealing combination, including: a housing, planetary gears, a sealing plate, a bearing, and a rotating shaft; it also includes an inner noise reduction ring, a sealing ring, and a fixing mechanism.

[0007] The inner noise reduction ring is fixedly connected to the inner wall of the outer shell, while the planetary gear is fixedly connected to the inner wall of the inner noise reduction ring.

[0008] Furthermore, the sealing ring is sandwiched between the mating surfaces of the outer shell and the sealing plate, and the fixing mechanism is used to lock and fix the outer shell and the sealing plate. The fixing mechanism includes a lock body fixed to the outer shell and a lock cylinder that is detachably locked to the lock body. Through the synergistic effect of the inner noise reduction ring, the sealing ring and the fixing mechanism, an integrated structure that combines noise reduction, sealing and convenient assembly is formed.

[0009] Preferably, the outer casing has a hole for installing a lock body, and the lock body is fixed inside the hole.

[0010] Preferably, the lock body has a keyhole inside for inserting the lock cylinder.

[0011] Preferably, the fixing mechanism also includes a second lock body, and the lock cylinder passes through the sealing plate and is connected to the second lock body.

[0012] Preferably, a knob is provided on the second lock body.

[0013] Preferably, a threaded rod is rotatably connected inside the lock body, and the knob is coaxially and fixedly connected to the threaded rod.

[0014] Preferably, the rotation of the threaded rod drives the lock cylinder to produce axial displacement, so that the lock cylinder engages or disengages from the keyhole.

[0015] Preferably, the inner noise reduction ring is used to block the sound generated when the planetary gears rotate, and the sealing ring is used to provide sound insulation after the outer shell and the sealing plate are connected.

[0016] This utility model has the following beneficial effects:

[0017] 1. This utility model, by setting an inner noise reduction ring on the inner wall of the outer shell and a sealing ring between the outer shell and the sealing plate, forms a combined noise reduction structure that combines the inner and outer parts. This solves the problem of high noise and poor sound insulation in existing planetary gear reducers, significantly reducing equipment operating noise and improving the quality of the working environment.

[0018] 2. This utility model uses a locking mechanism consisting of a lock body, lock cylinder, threaded rod and knob to connect the outer shell and the sealing plate, which solves the problems of inconvenient disassembly and low efficiency when using bolt fixing in the prior art. The structure is reliable, can be quickly disassembled and assembled without tools, and improves the convenience of maintenance. Attached Figure Description

[0019] Figure 1 This is a front perspective view of the planetary gear reducer with noise reduction and sealing combination proposed in this utility model;

[0020] Figure 2 This is a partial structural exploded view of the planetary gear reducer with noise reduction and sealing combination proposed in this utility model;

[0021] Figure 3 This is a partial structural diagram of the planetary gear reducer with noise reduction and sealing combination proposed in this utility model;

[0022] Figure 4 This is a partial structural diagram of the planetary gear reducer with noise reduction and sealing combination proposed in this utility model.

[0023] Legend:

[0024] 1. Outer shell; 2. Fixing mechanism; 201. Hole; 202. Lock body one; 203. Keyhole; 204. Lock body two; 205. Threaded rod; 206. Knob; 207. Lock cylinder; 3. Planetary gear; 4. Inner noise reduction ring; 5. Sealing ring; 6. Sealing plate; 7. Bearing; 8. Shaft. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0026] Example:

[0027] Please refer to Figures 1 to 4 This utility model provides a planetary gear reducer with noise reduction and sealing assembly, including a housing 1 and a sealing plate 6 for closing the opening of the housing 1. An inner noise reduction ring 4 is fixedly connected to the inner wall of the housing 1 by bonding or integral molding. A planetary gear 3, which serves as the transmission core, is fixedly connected to the inner wall of the inner noise reduction ring 4. The planetary gear 3 is housed in the space inside the housing 1 and is driven to rotate by an external power source. The inner noise reduction ring 4 is made of sound-absorbing or vibration-damping material and is used to absorb and block the sound generated by gear meshing during the high-speed rotation of the planetary gear 3, thus achieving initial noise reduction at the sound source. A bearing 7 is fixedly installed on the sealing plate 6. The inner ring of the bearing 7 is interference-fitted with the outer ring of the rotating shaft 8. The rotating shaft 8 passes through the center hole of the bearing 7 and can rotate with low friction under the support of the bearing 7. One end of the rotating shaft 8 extends out of the reducer to transmit power. The use of the bearing 7 can significantly reduce the friction of the rotating shaft 8 during rotation, thereby reducing the noise generated by friction.

[0028] An annular sealing ring 5 is sandwiched between the mating surfaces of the outer shell 1 and the sealing plate 6. When the sealing plate 6 and the outer shell 1 are pressed together by the fixing mechanism 2, the sealing ring 5 is compressed and deformed, filling the tiny gap between them. On the one hand, it prevents the lubricating oil inside the gearbox from leaking, and on the other hand, it blocks the path of internal noise to the outside through the structural gaps, thus achieving the dual functions of sealing and auxiliary sound insulation. In order to reliably lock and fix the outer shell 1 and the sealing plate 6, the fixing mechanism 2 is detachably connected to the outer shell 1 and the sealing plate 6, ensuring that the sealing ring 5 can be effectively pressed, thereby ensuring the structural stability and sealing reliability of the entire device.

[0029] Please refer to Figure 2 , Figure 3 and Figure 4A hole 201 is provided at the bottom of the outer shell 1 corresponding to the edge of the sealing plate 6. The lock body 202 is fixedly installed inside the hole 201. The lock body 202 has a keyhole 203 for guiding and accommodating the lock cylinder 207. The keyhole 203 is a through structure. The fixing mechanism 2 also includes a lock cylinder 207 that cooperates with the lock body 202. The lock cylinder 207 is a rod-shaped structure. In use, one end of the lock cylinder 207 passes through the pre-set through hole on the sealing plate 6 and is inserted into the keyhole 203.

[0030] The fixing mechanism 2 also includes a second lock body 204 for driving the lock cylinder 207 to lock. The second lock body 204 is located on the outside of the sealing plate 6. The other end of the lock cylinder 207 is connected to the second lock body 204. A threaded rod 205 is rotatably connected inside the second lock body 204. A knob 206 for easy manual operation is fixedly connected to the outside of the second lock body 204. The knob 206 is coaxially fixedly connected to the threaded rod 205. By rotating the knob 206, the threaded rod 205 can be driven to rotate inside the second lock body 204. The rotation of the threaded rod 205 is converted into the locking action of the lock cylinder 207 through the internal transmission structure. Finally, a tight locking fit is formed between the lock cylinder 207 and the inner wall of the keyhole 203, ensuring that the outer shell 1 and the sealing plate 6 can be firmly pressed together, providing sufficient preload for the sealing ring 5, thereby achieving a stable and reliable sealing and fixing effect.

[0031] As a preferred embodiment, in order to achieve stable installation and precise positioning of the fixing mechanism 2 and the outer casing 1, please refer to... Figure 3 A hole 201 is machined at a specific position on the bottom of the outer casing 1. The inner wall of the hole 201 is smooth and flat. The lock body 202 is firmly fixed inside the hole 201. The outer dimensions of the lock body 202 are precisely matched with the inner diameter of the hole 201 to ensure that there is no relative rotation or loosening between them. In order to guide the lock cylinder 207 and form a locking fit with it, a through keyhole 203 is machined on the central axis of the lock body 202. The inner wall of the keyhole 203 may have a keyway structure that matches the shape of the lock cylinder 207, which is used to provide guidance and prevent unnecessary rotation of the lock cylinder 207 during the locking process.

[0032] As another preferred embodiment, in order to achieve the driving and convenient operation of the lock cylinder 207, please refer to... Figure 2 and Figure 4The fixing mechanism 2 also includes a lock body 204 as an operating assembly. The overall structure of the lock body 204 is handle-shaped or disc-shaped, and it is connected to the outer end of the lock cylinder 207 by means of threads or snaps. During installation, the rod part of the lock cylinder 207 needs to pass through the installation through hole reserved on the sealing plate 6 first, and then connect to the lock body 204. A knob 206 is fixedly connected to the outer surface of the lock body 204. The surface of the knob 206 is usually provided with knurling or grooves to increase the friction during operation and facilitate the user to apply force. In the internal cavity of the lock body 204, a threaded rod 205 is rotatably connected. The axis of the threaded rod 205 is parallel or coincident with the axis of the lock cylinder 207. The knob 206 and one end of the threaded rod 205 are coaxially fixedly connected by key connection or welding to ensure that the two rotate synchronously.

[0033] As a further limitation on the locking transmission mechanism, in order to efficiently convert the rotation operation of the knob 206 into the linear locking action of the lock cylinder 207, the threaded rod 205 is machined with external threads, and the lock cylinder 207 or the drive block fixedly connected to the lock cylinder 207 is machined with internal threads that cooperate with the threaded rod 205. When the knob 206 drives the threaded rod 205 to rotate, the keyway between the lock cylinder 207 and the keyhole 203 restricts its own rotation. Therefore, the lock cylinder 207 can only move along its own axis under the action of the threaded pair, thereby realizing the action of locking into or disengaging from the keyhole 203, completing the entire locking and unlocking process of the planetary gear reducer with noise reduction and sealing combination.

[0034] As a specific noise reduction and sealing combination scheme, in order to maximize the noise reduction and sealing effect of the device, the inner noise reduction ring 4 is preferably made of butyl rubber or polymer composite sound-absorbing cotton material with good damping characteristics, and is seamlessly attached to the entire inner circumferential surface of the outer shell 1 by vulcanization or strong bonding. The sealing ring 5 is made of nitrile rubber material with good oil resistance and elasticity, with a circular or rectangular cross-section, and is embedded in the annular sealing groove opened on the joint surface of the outer shell 1 or the sealing plate 6, ensuring that a uniform and durable sealing force can be generated when compressed.

[0035] Working principle:

[0036] When the external motor or power source starts working, power is input to the planetary gear 3, and the planetary gear 3 immediately starts to rotate at high speed. The vibration and noise generated by the planetary gear 3 meshing with other gears during rotation will spread to all sides. Since the inner noise reduction ring 4 is fixedly connected to the entire inner wall of the outer shell 1, these noises will first impact the inner noise reduction ring 4 on the first path of outward propagation. The sound-absorbing and vibration-damping material of the inner noise reduction ring 4 will absorb most of the sound energy and convert it into heat energy, thereby significantly weakening the intensity of the noise and achieving the first layer of noise reduction.

[0037] The remaining noise will continue to propagate outward through the structure of the gearbox. When the noise reaches the joint between the outer shell 1 and the sealing plate 6, the sealing ring 5, which is pressed by the fixing mechanism 2, fills the structural gap and forms an effective acoustic barrier, further preventing noise leakage. This, together with the inner noise reduction ring 4, forms a combined noise reduction scheme that works in conjunction with the inner noise reduction ring 4. At the same time, the power of the gearbox is output outward through the rotating shaft 8. The rotating shaft 8 rotates inside the bearing 7 on the sealing plate 6. The balls or rollers inside the bearing 7 greatly reduce the sliding friction between the rotating shaft 8 and the sealing plate 6, making the rotation of the rotating shaft 8 smoother and more fluid. This reduces the harsh noise caused by high friction at the source and achieves low-frequency operation.

[0038] When it is necessary to fix or disassemble the sealing plate 6 to the outer shell 1 during assembly or maintenance, the operator only needs to align the lock cylinder 207 with the keyhole 203 and insert it, and then turn the knob 206 located on the lock body 204. The rotation of the knob 206 will drive the internal threaded rod 205 to rotate. Through the transmission action of the threaded pair, the lock cylinder 207 is finally driven to be firmly locked in the keyhole 203, thereby pressing the outer shell 1 and the sealing plate 6 tightly together. The whole process does not require complicated tools and is convenient and efficient.

Claims

1. A planetary gear reducer with noise reduction and sealing assembly, comprising: The outer casing (1), the planetary gear (3) housed within the outer casing (1), the sealing plate (6) for closing the outer casing (1), the bearing (7) mounted on the sealing plate (6), and the shaft (8) passing through the bearing (7); Its features are, It also includes an inner noise reduction ring (4) fixed to the inner wall of the outer shell (1), and the planetary gear (3) is fixed to the inner wall of the inner noise reduction ring (4); The planetary gear reducer with noise reduction and sealing combination also includes a sealing ring (5) sandwiched between the mating surfaces of the outer shell (1) and the sealing plate (6); The planetary gear reducer with noise reduction and sealing assembly also includes a fixing mechanism (2) for locking the outer shell (1) and the sealing plate (6). The fixing mechanism (2) includes a lock body (202) fixed to the outer shell (1) and a lock cylinder (207) that is detachably locked to the lock body (202).

2. The planetary gear reducer with noise reduction and sealing combination according to claim 1, characterized in that, The outer shell (1) has a hole (201) for mounting the lock body (202), and the lock body (202) is fixed inside the hole (201).

3. The planetary gear reducer with noise reduction and sealing combination according to claim 2, characterized in that, The lock body (202) has a keyhole (203) inside for the lock cylinder (207) to be inserted.

4. The planetary gear reducer with noise reduction and sealing combination according to claim 3, characterized in that, The fixing mechanism (2) also includes a second lock body (204), and the lock cylinder (207) passes through the sealing plate (6) and is connected to the second lock body (204).

5. The planetary gear reducer with noise reduction and sealing combination according to claim 4, characterized in that, A knob (206) is provided on the second lock body (204).

6. The planetary gear reducer with noise reduction and sealing combination according to claim 5, characterized in that, The lock body 2 (204) is rotatably connected to a threaded rod (205), and the knob (206) is coaxially and fixedly connected to the threaded rod (205).

7. The planetary gear reducer with noise reduction and sealing combination according to claim 6, characterized in that, The rotation of the threaded rod (205) drives the lock cylinder (207) to generate axial displacement, so that the lock cylinder (207) can be engaged or disengaged from the keyhole (203).

8. The planetary gear reducer with noise reduction and sealing combination according to claim 1, characterized in that, The inner noise reduction ring (4) is used to block the sound emitted when the planetary gear (3) rotates, and the sealing ring (5) is used to block the sound after the outer shell (1) and the sealing plate (6) are connected.

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