Gear transmission structure for a speed reducer

Abstract

The utility model relates to the technical field of speed reducer drive structure, and disclose a gear drive structure for speed reducer, including sun gear, gear ring and buffer shock component, the sun gear middle part is equipped with the taper mounting hole, with the taper mounting head of drive link is connected through buffer shock component, and buffer shock component contains the first installation platform of taper mounting hole inner wall, the second installation platform of taper mounting head outer periphery, the disc spring between both and the rubber sleeve of disc spring outer periphery, the inner periphery of gear ring is engaged with planetary gear, and the planetary gear is engaged with sun gear, and the oil cavity is equipped in the planetary gear, and the oil supply groove of outer periphery annular array, the oil supply groove is equipped with oil storage groove in the tooth surface of second wheel tooth two sides, and the oil supply groove is connected with oil storage groove. The utility model can buffer impact, strengthen engagement lubrication, reduce the wear and tear of wheel tooth, promote transmission stability and efficiency, prolong the service life of speed reducer, and be applicable to the speed reducer of industrial, engineering machinery and other fields.

Description

Technical Field

[0001] This utility model relates to the technical field of speed reducer transmission structure, specifically a gear transmission structure for a speed reducer. Background Technology

[0002] In the field of mechanical transmission, planetary gear transmission has become the core transmission form of equipment such as industrial reducers, engineering machinery reducers, and new energy equipment reducers due to its advantages of large transmission ratio, compact size, strong load-bearing capacity and high transmission efficiency. Its typical structure includes sun gear, planet gears and ring gear. The sun gear is usually connected to the external transmission rod (such as motor output shaft, load input shaft) through rigid means such as key connection, interference fit or flange connection to realize power transmission. At the same time, the meshing transmission of planet gears with sun gear and ring gear relies on overall oil immersion lubrication or splash lubrication to maintain operation. However, existing technologies have significant drawbacks: Firstly, the rigid connection between the transmission rod and the sun gear lacks a buffer and shock absorption design. During gearbox startup / shutdown or sudden load fluctuations, instantaneous impact loads are easily generated. These loads are directly transmitted to the meshing surfaces of the planetary gears, sun gear, and ring gear, leading to localized stress concentration on the teeth, causing wear, pitting, and even tooth breakage. Simultaneously, this exacerbates vibration and noise in the transmission components, reducing transmission accuracy and the overall service life of the equipment. Secondly, the lubrication efficiency of the planetary gear meshing surfaces is low. Existing lubrication methods struggle to maintain a stable and continuous grease retention in the core meshing area. Especially during high-speed transmission, centrifugal force easily throws the grease off the meshing surfaces. While some improved designs add oil supply channels, the lack of guides or oil storage structures at the channel outlets prevents precise grease delivery to the meshing surfaces, resulting in insufficient lubrication and exacerbating tooth friction and wear, leading to decreased transmission efficiency. Therefore, the industry urgently needs a planetary gear transmission structure that combines buffer and shock absorption to mitigate impact damage and enhances lubrication of the planetary gear meshing surfaces to reduce frictional failure. This is crucial to adapt to complex operating conditions and improve the operational stability and service life of the gearbox. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a gear transmission structure for a speed reducer.

[0004] To solve the above problems, this utility model provides the following technical solution: a gear transmission structure for a speed reducer, including a sun gear, a gear ring, and a buffer and shock absorption assembly. The gear ring has multiple third gear teeth on its inner circumference, a sun gear is located in the middle of the gear ring, a sun gear has multiple first gear teeth on its outer circumference, a planet gear is arranged in a ring array around the sun gear, and a planet gear has multiple second gear teeth on its outer circumference. The first gear teeth of the sun gear mesh with the second gear teeth at one end of the planet gear, and the second gear teeth at the other end of the planet gear mesh with the third gear teeth on the inner circumference of the gear ring.

[0005] A tapered mounting hole is provided in the middle of the sun gear, and the tapered mounting hole is connected to the tapered mounting head at one end of the transmission rod through a buffer and shock absorption assembly.

[0006] Preferably, the buffer and shock absorption assembly includes a first mounting platform, a second mounting platform, and disc springs. Multiple first mounting platforms are provided on the inner wall of the conical mounting hole, and multiple second mounting platforms are provided on the outer periphery of the conical mounting head corresponding to the positions of the first mounting platforms. Multiple sets of disc springs are provided between the first mounting platforms and the second mounting platforms.

[0007] Preferably, oil storage grooves are provided on both sides of the second gear teeth, an oil cavity is provided inside the planetary gear, and multiple oil supply grooves are arranged in a ring array around the outer periphery of the oil cavity. A stop block is provided in the middle of the end of the oil supply groove away from the oil cavity, and the two sides of the end of the oil supply groove away from the oil cavity are connected to the oil storage groove.

[0008] Preferably, the disc spring is provided with a sleeve on its outer periphery, one end of the sleeve is fixedly connected to the inner wall of the conical mounting hole, and the other end of the sleeve is fixedly connected to the outer periphery of the conical mounting head.

[0009] Preferably, the sleeve is made of rubber.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] By setting a buffer and shock absorption assembly containing a disc spring, a rubber sleeve, and corresponding first and second mounting platforms between the sun gear conical mounting hole and the transmission rod conical mounting head, the instantaneous impact load generated during the start-up and shutdown of the reducer or load fluctuations is effectively absorbed. The disc spring bears and buffers the impact through elastic deformation, and the rubber sleeve further blocks the impact transmission path through flexible deformation, which greatly reduces the local stress concentration of the gear teeth, reduces the risk of gear tooth wear, pitting and tooth breakage, and significantly reduces the vibration amplitude and operating noise of the transmission components, thereby improving the transmission accuracy and operating stability of the reducer.

[0012] By setting oil reservoirs on both sides of the second gear teeth of the planetary gear, and cooperating with the internal oil cavity and the outer ring array of oil supply grooves of the planetary gear, precise and long-term lubrication of the meshing surface of the planetary gear is achieved, forming a closed-loop lubrication structure of "oil cavity for oil storage - oil supply groove for oil guidance - oil reservoir for oil storage". The stop block prevents the lubricating oil from being excessively thrown away due to centrifugal force, ensuring that the meshing surface always has sufficient grease, reducing gear tooth friction and wear, improving transmission efficiency, and avoiding transmission failure caused by insufficient lubrication. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 2 This utility model Figure 1 Schematic diagram of the exploded structure at point A;

[0015] Figure 3 This utility model Figure 1 Schematic diagram of the internal structure at point B.

[0016] The components are: 1. Sun gear; 101. First gear tooth; 102. Conical mounting hole; 103. First mounting platform; 2. Transmission rod; 201. Conical mounting head; 202. Second mounting platform; 3. Planetary gear; 301. Second gear tooth; 302. Oil chamber; 303. Oil supply groove; 304. Stop block; 306. Oil storage groove; 4. Gear ring; 401. Third gear tooth; 5. Disc spring; 6. Sleeve. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1 - Figure 3 This utility model provides a technical solution. The buffer and shock absorption component includes a first mounting platform 103, a second mounting platform 202 and a disc spring 5. Multiple first mounting platforms 103 are provided on the inner wall of the conical mounting hole 102. Multiple second mounting platforms 202 are provided on the outer periphery of the conical mounting head 201 corresponding to the positions of the first mounting platforms 103. Multiple sets of disc springs 5 ​​are provided between the first mounting platforms 103 and the second mounting platforms 202.

[0019] Through the above technical solution, the corresponding layout of the first mounting platform 103 and the second mounting platform 202 can ensure that the disc spring 5 is accurately aligned and evenly stressed during installation, avoiding the problem of uneven load caused by installation misalignment. The multiple disc springs 5 ​​can effectively absorb the instantaneous impact load generated when the reducer starts or stops or when the load fluctuates suddenly by means of their own elastic deformation, reducing the transmission of impact energy to the sun gear 1 and the transmission rod 2, thereby avoiding the impact load from acting directly on the meshing surface of the planetary gear 3 and the sun gear 1 and the gear ring 4, reducing the local stress concentration of the first gear tooth 101, the second gear tooth 301, and the third gear tooth 401, reducing the risk of tooth wear, pitting, or even tooth breakage, while reducing the vibration amplitude during the transmission process, and improving the operational stability and service life of the entire gear transmission structure.

[0020] This utility model provides a technical solution in which oil storage grooves 306 are provided on both sides of the tooth surface of the second gear 301, an oil cavity 302 is provided inside the planetary gear 3, and multiple oil supply grooves 303 are arranged in a ring array on the outer periphery of the oil cavity 302. A stop block 304 is provided in the middle of the end of the oil supply groove 303 away from the oil cavity 302, and the two sides of the end of the oil supply groove 303 away from the oil cavity 302 are connected to the oil storage grooves 306.

[0021] Through the above technical solution, the oil chamber 302 can store a sufficient amount of lubricating oil, the oil supply groove 303 can guide the lubricating oil to the oil storage groove 306 in a directional manner, and the stop block 304 can prevent the lubricating oil from being excessively thrown away by the centrifugal force generated by the high-speed rotation of the planetary gear 3, ensuring that the lubricating oil is stably retained in the oil storage groove 306, so that when the second gear 301 meshes with the first gear 101 and the third gear 401, the meshing surface always maintains sufficient grease, which greatly reduces the meshing friction and wear of the gear teeth, avoids the decrease in transmission efficiency or gear failure caused by insufficient lubrication, and significantly extends the service life of the planetary gear 3 and the entire transmission structure.

[0022] This utility model provides a technical solution in which a sleeve 6 is provided on the outer periphery of the disc spring 5. One end of the sleeve 6 is fixedly connected to the inner wall of the conical mounting hole 102, and the other end of the sleeve 6 is fixedly connected to the outer periphery of the conical mounting head 201. The sleeve 6 is made of rubber.

[0023] Through the above technical solution, the rubber sleeve 6 can form a synergistic effect of "elastic buffer + flexible shock absorption" with the disc spring 5 by means of its own flexible deformation, further absorbing the impact energy when the reducer starts or stops or the load fluctuates, reducing the transmission of vibration to the sun gear 1 and the transmission rod 2, and cooperating with the first mounting platform 103 and the second mounting platform 202 to position the disc spring 5, avoiding component displacement caused by impact.

[0024] Secondly, the sleeve 6 forms a sealing barrier, preventing external dust and impurities from entering the assembly gap of the disc spring 5 and the mating surface of the tapered mounting hole 102 and the tapered mounting head 201, thus preventing wear or jamming caused by impurities and ensuring the long-term stable operation of the buffer and shock absorption assembly. Finally, the fixed connection structure of the sleeve 6 can provide radial limiting and guiding for the disc spring 5, ensuring that the disc spring 5 always moves axially during compression and reset, avoiding off-center load caused by radial offset, thereby protecting the meshing accuracy of the first gear tooth 101, the second gear tooth 301, and the third gear tooth 401, and extending the service life of the entire gear transmission structure and buffer assembly.

[0025] The working principle of this utility model is as follows:

[0026] When the reducer is running, external power is input through the transmission rod 2. The conical mounting head 201 of the transmission rod 2 and the conical mounting hole 102 of the sun gear 1 achieve power transmission and impact buffering through the buffer and shock absorption components. At this time, the first mounting platform 103 on the inner wall of the conical mounting hole 102 and the second mounting platform 202 on the outer periphery of the conical mounting head 201 are precisely aligned. The multiple sets of disc springs 5 ​​between them can absorb the instantaneous impact load generated when the transmission rod 2 inputs power (especially at the moment of start-up or stop or when the load fluctuates) through elastic deformation. At the same time, the rubber sleeve 6 on the outer periphery of the disc spring 5, on the one hand, further assists in buffering vibration and blocking impact transmission by its own flexible deformation, and on the other hand, through the fixed connection with the inner wall of the conical mounting hole 102 and the outer periphery of the conical mounting head 201, plays a radial limiting and guiding role for the disc spring 5, preventing it from deviating and blocking impurities from entering.

[0027] After being buffered, the power is transmitted to the sun gear 1. The sun gear 1 meshes with the second gear 301 at one end of the planet gear 3, which is distributed in a ring array, through the first gear tooth 101 on its outer periphery, driving the planet gear 3 to rotate. The planet gear 3 then meshes with the third gear 401 on the inner periphery of the gear ring 4 through the second gear tooth 301 at the other end, stably transmitting the power to the gear ring 4 (or outputting power from the planet gear carrier according to transmission requirements). During this process, the oil chamber 302 inside the planet gear 3 stores lubricating oil, which is then distributed through the ring array on the outer periphery of the oil chamber 302. The oil supply groove 303 provides directional delivery. The stop block 304 at the middle of the end of the oil supply groove 303 away from the oil chamber 302 can prevent the lubricating oil from being excessively thrown away by the centrifugal force generated by the high-speed rotation of the planetary gear 3. This allows the lubricating oil to flow stably into the oil storage groove 306 on the tooth surface of the second gear 301, which is connected to both sides of the oil supply groove 303. This provides sufficient lubrication to the meshing surfaces of the second gear 301 with the first gear 101 and the third gear 401, reducing meshing friction and wear, and ultimately achieving stable, efficient, and low-loss operation of the entire gear transmission structure.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A gear transmission structure for a speed reducer, characterized in that: The device includes a sun gear (1), a gear ring (4), and a shock-absorbing assembly. The inner circumference of the gear ring (4) is provided with multiple third gear teeth (401). The center of the gear ring (4) is provided with a sun gear (1). The outer circumference of the sun gear (1) is provided with multiple first gear teeth (101). The outer ring of the sun gear (1) is provided with multiple planet gears (3). The outer circumference of the planet gears (3) is provided with multiple second gear teeth (301). The first gear teeth (101) of the sun gear (1) mesh with the second gear teeth (301) at one end of the planet gears (3). The second gear teeth (301) at the other end of the planet gears (3) mesh with the third gear teeth (401) on the inner circumference of the gear ring (4). The sun gear (1) has a tapered mounting hole (102) in the middle, and the tapered mounting hole (102) is connected to the tapered mounting head (201) at one end of the transmission rod (2) through a buffer and shock absorption assembly.

2. The gear transmission structure for a speed reducer according to claim 1, characterized in that: The buffer and shock absorption assembly includes a first mounting platform (103), a second mounting platform (202), and a disc spring (5). Multiple first mounting platforms (103) are provided on the inner wall of the conical mounting hole (102). Multiple second mounting platforms (202) are provided on the outer periphery of the conical mounting head (201) corresponding to the positions of the first mounting platforms (103). Multiple sets of disc springs (5) are provided between the first mounting platforms (103) and the second mounting platforms (202).

3. The gear transmission structure for a speed reducer according to claim 1, characterized in that: Oil storage grooves (306) are provided on both sides of the second gear (301). An oil cavity (302) is provided inside the planetary gear (3). Multiple oil supply grooves (303) are arranged in a ring array on the outer periphery of the oil cavity (302). A stop block (304) is provided in the middle of the end of the oil supply groove (303) away from the oil cavity (302). The two sides of the end of the oil supply groove (303) away from the oil cavity (302) are connected to the oil storage grooves (306).

4. The gear transmission structure for a speed reducer according to claim 2, characterized in that: The disc spring (5) is provided with a sleeve (6) on its outer periphery. One end of the sleeve (6) is fixedly connected to the inner wall of the conical mounting hole (102), and the other end of the sleeve (6) is fixedly connected to the outer periphery of the conical mounting head (201).

5. The gear transmission structure for a speed reducer according to claim 4, characterized in that: The sleeve (6) is made of rubber.

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