Low-noise gear

Abstract

The invention discloses a low-noise gear, which belongs to the field of transmission mechanisms and comprises a fluted disc and teeth integrally connected to the edge of the fluted disc, and further comprises buffer plates arranged in tooth surfaces of the teeth, and the buffer plates are magnetic sheets wrapped with flexible materials. Wherein the airflow mechanism is used for generating an airflow effect through the movement of the buffer plate to assist in cooling the tooth surface. According to the low-noise gear, related structures are improved in the tooth surface and the teeth of the gear, an existing separated gear structure is matched, the noise of the whole operation of the gear can be reduced in a contact mode from the tooth surface, and meanwhile, multiple cooling and automatic lubrication can be achieved through the contact between the tooth surfaces while the structure is used for reducing noise; therefore, noise is further reduced in a lubricating mode, the service life of the gear is prolonged in a buffering and cooling mode, and the high-strength requirement of the gear serving as a transmission part in a new energy heavy truck is met.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission components, specifically to a gear that uses comprehensive buffering means to achieve the effect of reducing noise, and more specifically to a gear that is particularly suitable for new energy heavy-duty trucks, specifically a low-noise gear. Background Art

[0002] As an important basic transmission component, a gear realizes the rotational transmission effect through the principle of meshing transmission. When used as a transmission component of a new energy heavy-duty truck, it is different from the transmission requirements of traditional pure fuel heavy-duty trucks. Due to the combination of the engine, motor, and battery pack weights in new energy heavy-duty trucks, although significant upgrades have been made in the driving form and driving texture, the force requirements for the gears as transmission components have also increased significantly. For example, a low-noise gear with the publication number CN219159466U, the gear body is composed of a combined gear and a connecting inner ring. Installation plates are evenly installed inside the connecting inner ring, and slots are provided on both sides inside the installation plates. In the process of using this utility model, when the tooth teeth need to be replaced, first remove the sound-absorbing plate, rotate the knob to drive the connecting shaft and the outer first bevel gear to rotate. Under the action of the meshing connection of the gears, the second bevel gear drives the positive and negative thread screw to rotate, further driving the thread sleeves and fixing blocks on both sides to move inward simultaneously to extract the fixing blocks from the fixing grooves, thereby canceling the limit fixation of the insertion blocks and slots. The separation of the insertion blocks and slots facilitates the replacement of a single combined gear. At the same time, by setting four groups of combined gears, they can be individually replaced according to the tooth wear situation.

[0003] Or a low-noise gear with the publication number CN114001143A, including a gear body. A plurality of sawteeth are provided on the circumference of the gear body. A central assembly hole is provided at the center of the gear body. The gear body is also provided with a plurality of connecting holes, and the connecting holes are evenly distributed along the gear body. A shock-absorbing layer is embedded in the gear. This gear has a simple structure. Through the setting of the shock-absorbing layer, the vibration of the gear is greatly reduced, and the shock-absorbing effect of the gear is strengthened, enabling the gear to adapt to various occasions.

[0004] This type of existing technology adds a buffer mechanism or a shock-absorbing mechanism to the tooth disc structure of the gear. Such means can achieve a good effect of weakening the vibration and have good practical value, so as to reduce resonance to achieve the purpose of noise reduction. However, in addition to the vibration of its own mechanism, the main reason for the noise of the gear is the collision between the tooth surface structures. The above existing technology does not effectively limit this type of collision noise. At the same time, there are still many deficiencies in the transmission components used in new energy vehicles, especially heavy-duty trucks. In the case of large weight and high torque, gear wear and heat generation are particularly serious. Summary of the Invention

[0005] The object of the present invention is to provide a low-noise gear, in order to solve the problem proposed in the above-mentioned background technology that the existing technology reduces resonance to achieve the purpose of noise reduction by adding a buffer mechanism or a shock-absorbing mechanism in the tooth disc structure of the gear. However, in addition to the vibration of its own mechanism, the main reason for the noise of the gear is the collision between the tooth surface structures, and the above-mentioned existing technology does not effectively limit this type of collision noise. At the same time, there are still many deficiencies in the transmission components used in new energy vehicles, especially heavy truck vehicles. In the case of large weight and high torque, the problems of gear wear and heat generation are particularly serious.

[0006] To achieve the above object, the present invention provides the following technical solution: a low-noise gear, including a tooth disc and teeth integrally connected to its edge, and the low-noise gear further includes buffer sheets arranged on the tooth surfaces of the teeth, wherein the buffer sheets are magnetic sheets wrapped with flexible materials, and the magnetism on the outer surfaces of two adjacent buffer sheets is arranged to repel each other.

[0007] Preferably, the buffer sheet is also connected to an air flow mechanism, and the air flow mechanism is used to generate an air flow effect through the movement of the buffer sheet to assist in cooling the tooth surface.

[0008] Preferably, the air flow mechanism includes a receiving cavity for receiving the buffer sheet, wherein the receiving cavity is formed on the tooth surface, and the buffer sheet is elastically slidably installed in the receiving cavity through a cross bar.

[0009] Preferably, the edge of the buffer sheet is closely attached to the inner walls around the receiving cavity, and a through hole is opened at the end of the buffer sheet corresponding to one inner wall, and the through hole is used to communicate the receiving cavity with the tooth groove.

[0010] Preferably, an oil hole communicating with its internal cavity is also opened on the surface of the buffer sheet, and the cavity is connected to an oil supply mechanism through a one-way flow pipe body.

[0011] Preferably, the oil supply mechanism includes a cylinder body and a cross bar for driving the flow of oil and connected to the buffer sheet, wherein the cylinder body fits into the space opened in the tooth, and this space is formed in the teeth of the upper and lower layers of gears. After the two layers of gears are butted to form a complete gear, the upper and lower spaces jointly fit and fix the cylinder body, and the space where the cylinder body is located is strengthened by a reinforcing rib to enhance the overall strength of the tooth.

[0012] Preferably, the oil storage space in the cylinder body is composed of an elastic layer and a partition board, and the sheet in the cylinder body is used to suck the oil in the oil storage space during movement and flow out from the oil hole.

[0013] Preferably, the inner end surface of the sheet and the space in the partition board are the oil delivery space, and one-way holes for guiding the one-way flow of oil are installed in both the partition board and the sheet.

[0014] Preferably, the outer surface of the partition is connected to the cross bar, and the space on the outer surface of the partition communicates with the input end of the pipe body.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: in this low-noise gear, relevant structures are improved on the tooth surface and teeth of the gear. In combination with the existing split gear structure, it can reduce the noise of the overall operation of the gear in a contact manner from the tooth surface. At the same time, while using structural noise reduction, it can achieve multiple cooling and automatic lubrication through the contact between the tooth surfaces. Thus, the noise can be further reduced through lubrication. Through the above methods, not only the gear noise is reduced, but also the wear of the gear transmission can be reduced through means such as buffering. It is more suitable for transmission components of heavy-duty trucks in the new energy category, as shown in the following content.

[0016] 1. The buffer sheet mechanism composed of magnetic sheets wrapped with flexible materials can, on the one hand, use the flexible materials on its outer surface to reduce the collision and friction noise generated during tooth surface contact, and on the other hand, use the flexible materials and the magnetic repulsion effect to produce a better auxiliary buffering effect;

[0017] As a further measure, the buffer sheet is designed to be displaceable to a certain extent on the tooth surface. On the one hand, it can further enhance the anti-collision buffering effect, and on the other hand, it can make the buffer sheet move in the accommodation cavity through the contact of the tooth surface. Furthermore, through the pressure change before and after contact, the effects of blowing air to assist in cleaning and cooling the tooth surface and the air flow reflux to assist in cooling the tooth surface can be respectively achieved, effectively increasing the gear life and improving the quiet effect.

[0018] 2. The structural design of the cylinder body enables the movement of the buffer sheet not only to achieve the buffer noise reduction, auxiliary cleaning, and air flow cooling effects described above, but also to change the internal pressure by driving the sheet body to move synchronously. Thus, the reserved lubricating oil in the cylinder body can flow out following the contact of the tooth surface during the rotation of the gear, and then achieve automatic lubrication of the tooth surface through the oil holes, achieving the effect of reducing noise from another angle and having a better comprehensive noise reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0020] Figure 2 It is a schematic diagram of the distribution structure of the buffer sheet of the present invention;

[0021] Figure 3 It is a schematic diagram of the distribution structure of the through holes of the present invention;

[0022] Figure 4 It is a schematic diagram of the gear cross-section structure of Embodiment 1 of the present invention;

[0023] Figure 5 Schematic diagram of the gear section structure of the second embodiment of the present invention;

[0024] Figure 6 Schematic diagram of the internal structure of the cylinder body of the present invention;

[0025] Figure 7 Schematic diagram of the oil hole distribution structure of the present invention;

[0026] Figure 8 Schematic diagram of the structure of the split gear after splitting in the second embodiment of the present invention.

[0027] In the figure: 1, tooth disc; 2, tooth; 3, buffer sheet; 4, through hole; 5, accommodation cavity; 6, cross bar; 7, cylinder body; 8, reinforcing rib; 9, sheet body; 10, partition; 11, elastic layer; 12, one-way hole; 13, pipe body; 14, oil hole. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figures 1 - 8 , the present invention provides the following technical solutions:

[0030] Embodiment 1: The solution disclosed in this embodiment is to solve the problems existing in the prior art. The noise reduction effect produced by a single buffer mechanism is not good, especially when medium or large gears are used in new energy heavy trucks. Therefore, as Figure 1 and Figure 2 shown, it includes a tooth disc 1 and teeth 2 integrally connected to its edge. The low-noise gear also includes buffer sheets 3 provided on the tooth surfaces of the teeth 2. Among them, the buffer sheets 3 are magnetic sheets wrapped with flexible materials, and at the same time, the magnetism on the outer surfaces of two adjacent buffer sheets 3 is set to be repulsive. By setting buffer sheets 3 with flexible materials on the tooth surfaces of the teeth 2, the collision of the tooth surfaces of the metal structure is replaced by the buffer sheets 3 of the flexible structure, thereby achieving anti-collision and relatively better sound insulation effects. At the same time, since the periphery of the magnetic sheet is completely wrapped with flexible materials, the principle of repulsion of the magnetic sheets can be combined to cause the back surface of the buffer sheet 3 to deform under force, thereby achieving a better buffer and low-noise effect.

[0031] In the solution disclosed in this embodiment, the practical functions of the buffer sheet 3 are further expanded within a reasonable range. At the same time, to solve the problems that the heat generation of the gear itself increases and the cooling performance decreases after adopting the low-noise mechanism in the prior art, therefore, it is disclosed that asFigures 3 - 4 In the shown solution, the buffer piece 3 is also connected to the air flow mechanism. The air flow mechanism is used to generate an air flow effect through the movement of the buffer piece 3 to assist in cooling the tooth surface. The air flow mechanism includes a receiving cavity 5 for receiving the buffer piece 3. The receiving cavity 5 is formed on the tooth surface. The buffer piece 3 is elastically slidably installed in the receiving cavity 5 through a cross bar 6. The edge of the buffer piece 3 is closely attached to the inner walls around the receiving cavity 5. A through hole 4 is provided at the end of the buffer piece 3 corresponding to one of the inner walls. The through hole 4 is used to connect the receiving cavity 5 and the tooth groove. In this solution, there are actually two situations where cooling is required and can be achieved. The first is when two adjacent gears are in contact with each other, the tooth surface is in a working state, and when the buffer piece 3 moves towards the direction close to the receiving cavity 5 under force, the air flow in the receiving cavity 5 will be squeezed and ejected from the through hole 4, and then act on the tooth surface contact position, so as to achieve a single cooling effect while achieving low-noise buffering. After the corresponding tooth surface is disengaged from contact, the buffer piece 3 will elastically move back correspondingly. Therefore, the internal space of the receiving cavity 5 will suck in the external air flow through the through hole 4 to reserve the air flow blown out by subsequent extrusion, and it is also a secondary cooling effect, so as to achieve a better cooling effect.

[0032] Embodiment 2: The solution disclosed in this embodiment is actually to add a replaceable / detachable module to the gear, and the function of this module is realized by the movement of the buffer piece 3. This means is particularly applicable to large gears (compared with the gear structure of household cars), such as the spliced large gears produced by Zhuji Baorui Gear Co., Ltd. and the separable docking gears of enterprises such as Changzhou Gleason Qianjin Gear Co., Ltd. and Jiangsu Synthetic Gear Co., Ltd. Oil holes 14 communicating with its internal cavity are also provided on the surface of the buffer piece 3, and the cavity is connected to the oil supply mechanism through a one-way flow pipe body 13. The oil supply mechanism includes a cylinder body 7 and a cross bar 6 for driving the flow of oil and connected to the buffer piece 3. The cylinder body 7 fits into the space formed in the tooth 2. This space is formed in the teeth 2 of the upper and lower layers of gears, and after the two layers of gears are butted to form a complete gear, the upper and lower spaces jointly fit and fix the cylinder body 7. The space where the cylinder body 7 is located strengthens the overall strength of the tooth 2 through the reinforcing rib 8. The oil storage space in the cylinder body 7 is composed of an elastic layer 11 and a partition 10. The sheet 9 in the cylinder body 7 is used to suck the oil in the oil storage space during movement and flow out from the oil hole 14. The inner end face of the sheet 9 and the space in the partition 10 are the oil delivery spaces. One-way holes 12 for guiding the one-way flow of oil are installed in both the partition 10 and the sheet 9. The outer surface of the partition 10 is connected to the cross bar 6, and the outer surface space of the partition 10 is communicated with the input end of the pipe body 13. A receiving space is integrally formed or subsequently processed in the tooth 2 of the gear, and the receiving space is used as the receiving structure of the cylinder body 7. After the double-layer gear is spliced and fixed, the installation of the cylinder body 7 is limited. During normal use, the movement of the buffer piece 3 will drive the sheet 9 to move synchronously in the cylinder body 7 through the cross bar 6. At this time, the pressure in the space where the inner surface of the sheet 9 is located changes, so as to guide the oil in the oil storage space to pass through the one-way hole 12 on the partition 10 through the deformation of the elastic layer 11 and enter the oil delivery space. During the subsequent movement of the buffer piece 3 driving the sheet 9, the oil can successively enter the space communicated with the input end of the pipe body 13 and the internal space of the buffer piece 3 and finally flow out from the oil hole 14 communicated with it. The specific outflow efficiency is related to the single movement distance and movement frequency of the buffer piece 3. By controlling the above parameters, the use and replacement cycle of the lubricating oil is adjusted to adapt to the maintenance frequency of new energy heavy trucks. This is the prior art and will not be elaborated here.

[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-noise gear, comprising a toothed disc (1) and teeth (2) integrally connected to the edge thereof, characterized in that: The low-noise gear further includes a buffer piece (3) disposed on the tooth surface of the tooth (2), wherein the buffer piece (3) is a magnetic sheet wrapped with a flexible material, and the magnetism on the outer surfaces of two adjacent buffer pieces (3) is arranged to be repulsive.

2. A low-noise gear according to claim 1, characterized in that: The buffer piece (3) is also connected to an air flow mechanism, and the air flow mechanism is used to generate an air flow effect through the movement of the buffer piece (3) to assist in cooling the tooth surface.

3. A low-noise gear according to claim 2, characterized in that: The air flow mechanism includes a receiving cavity (5) for receiving the buffer piece (3), wherein the receiving cavity (5) is formed on the tooth surface, and the buffer piece (3) is elastically slidably installed in the receiving cavity (5) through a cross bar (6).

4. A low-noise gear according to claim 3, wherein: The edge of the buffer piece (3) is closely attached to the inner walls around the receiving cavity (5), and a through hole (4) is opened at the end of the buffer piece (3) corresponding to one inner wall, and the through hole (4) is used to communicate the receiving cavity (5) with the tooth groove.

5. A low-noise gear according to any one of claims 1-4, characterized in that: An oil hole (14) communicating with the inner cavity is also opened on the surface of the buffer piece (3), and the inner cavity is connected to an oil supply mechanism through a one-way flow pipe body (13).

6. A low-noise gear according to claim 5, characterized in that: The oil supply mechanism includes a cylinder body (7) and a cross bar (6) for driving the flow of oil and connected to the buffer piece (3), wherein the cylinder body (7) fits into the space opened in the tooth (2), and this space is formed in the teeth (2) of the upper and lower layers of gears. After the two layers of gears are butted to form a complete gear, the upper and lower spaces jointly fit and fix the cylinder body (7), and the space where the cylinder body (7) is located strengthens the overall strength of the tooth (2) through a reinforcing rib (8).

7. A low-noise gear according to claim 6, wherein: The oil storage space in the cylinder body (7) is composed of an elastic layer (11) and a partition plate (10), and a sheet body (9) in the cylinder body (7) is used to suck the oil in the oil storage space during movement and flow out from the oil hole (14).

8. A low-noise gear according to claim 7, characterized in that: The inner end surface of the sheet body (9) and the space in the partition plate (10) are the oil delivery space, and one-way holes (12) for guiding the one-way flow of oil are installed in both the partition plate (10) and the sheet body (9).

9. A low-noise gear according to claim 8, characterized in that: The outer surface of the partition plate (10) is connected to the cross bar (6), and the space on the outer surface of the partition plate (10) is communicated with the input end of the pipe body (13).

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