An engaging member

Abstract

In order to solve the problem that the existing passive damping technology cannot effectively reduce the safety hazard of meshing transmission, the present application provides a meshing component, which comprises a base body and meshing teeth protruding from the base body, the meshing teeth comprise a tooth top surface and tooth surfaces arranged on both sides of the tooth top, a tooth groove is arranged between two meshing teeth, a meshing tooth end is arranged at both ends of the meshing tooth and intersects with the tooth top surface and the tooth surface, a tooth part damping liquid film forming gap is arranged on the meshing tooth, the tooth part damping liquid film forming gap penetrates the meshing tooth between the two meshing tooth ends, an end cover is arranged on the meshing tooth end and covers the tooth part damping liquid film forming gap, and the tooth part damping liquid film forming gap forms a tooth part gap closed figure in a cross section parallel to the end cover. The technical scheme of the present application can effectively improve the service life of the meshing component.

Description

TECHNICAL FIELD

[0001] The present application relates to an engaging component, such as a gear, in particular an engaging component with a vibration damping function. BACKGROUND

[0002] Engaging components, such as gears, which transmit power through the engagement of teeth, are widely used in the fields of aerospace, automobiles, ships, etc. due to their stable power transmission, compact structure, large load capacity, high transmission efficiency, etc. However, in actual applications, errors inevitably occur during the manufacturing and installation of the engaging components, and elastic deformation of the engaging components also occurs after the engaging components are loaded, which causes the actual engagement point to deviate from the theoretical engagement line, thereby causing engagement impact on the engaging components. With the development of modern industry towards heavy load, high speed and high precision, the vibration problem of engaging transmission caused by time-varying stiffness and engagement impact is increasingly prominent, which causes great safety hazards to the normal operation of equipment. The vibration of gears has led to fatigue fracture accidents of aero-engines at home and abroad. Therefore, how to suppress the vibration generated during engaging transmission and ensure the safe and stable operation of equipment, especially some high-end equipment, has become a problem to be solved.

[0003] According to the vibration mechanism of the engaging component transmission, the current engineering solution to the problem of excessive vibration in engaging transmission mainly includes active vibration reduction and passive vibration reduction. Active vibration reduction optimizes parameters in the design stage of the engaging component, improves the design precision of the engaging component and the machining and installation precision, thereby reducing vibration energy at the source. However, this method is difficult, has a large amount of calculation and high cost. Passive vibration reduction mainly applies a damper to the equipment, converts vibration energy into heat energy through the damping effect, thereby achieving the purpose of vibration reduction. The existing passive vibration reduction technology mainly sets a damping structure, such as a damping ring, on the base body of the engaging component, and dissipates vibration energy through the damping structure, thereby suppressing the vibration of the engaging component.

[0004] However, the main problem of the existing passive vibration reduction technology is that the damping structure is arranged on the base body of the engaging component, and the engagement impact is directly applied to the engaging teeth. Therefore, the existing passive vibration reduction technology is difficult to reduce the vibration impact on the engaging teeth, and thus it is difficult to effectively reduce the safety hazards of engaging transmission. SUMMARY

[0005] In order to solve the problem that the existing passive vibration reduction technology is difficult to effectively reduce the safety hazards of engaging transmission, the present application provides an engaging component.

[0006] The technical scheme of the present application is as follows:

[0007] An engaging component comprises a base body and engaging teeth protruding from the base body, the engaging teeth comprise a tooth top surface and tooth surfaces arranged on both sides of the tooth top, a tooth groove is arranged between two of the engaging teeth, a tooth end is arranged at both ends of the engaging teeth and intersects with the tooth top surface and the tooth surface, a tooth damping liquid film forming gap is arranged on the engaging teeth, the tooth damping liquid film forming gap penetrates the engaging teeth between the two tooth ends, an end cover is arranged on the tooth end to cover the tooth damping liquid film forming gap, and the tooth damping liquid film forming gap forms a tooth gap closure pattern in a cross section parallel to the end cover.

[0008] Optionally, a groove damping liquid film forming gap is arranged on the base body adjacent to the tooth groove, the groove damping liquid film forming gap penetrates the base body along the direction of the line connecting the two tooth ends, and the groove damping liquid film forming gap forms a groove gap closure pattern in the cross section parallel to the end cover.

[0009] Optionally, any normal line of a curve formed on the bottom of the tooth groove in the cross section intersects with at least one of the groove gap closure patterns.

[0010] Optionally, the number of the tooth gap closure patterns is greater than 1.

[0011] Optionally, any normal line of a curve formed on the tooth top surface in the cross section intersects with at least one of the tooth gap closure patterns.

[0012] Optionally, the tooth gap closure pattern in the cross section comprises a tooth gap closure pattern whose long axis protrudes from the curve formed on the tooth top surface.

[0013] Optionally, any normal line of a curve formed on the tooth surface in the cross section intersects with at least one of the tooth gap closure patterns.

[0014] Optionally, the tooth gap closure pattern in the cross section comprises a tooth gap closure pattern whose long axis is parallel to the curve formed on the tooth surface.

[0015] Optionally, a sealing member is arranged between the end cover and the tooth end, the end cover, the tooth end and the sealing member form a liquid storage space, and the liquid storage space is in communication with the tooth damping liquid film forming gap.

[0016] Optionally, the engaging component comprises a spur gear, a helical gear, a spur gear rack or a helical gear rack.

[0017] The technical effects of the present application are as follows:

[0018] The engaging component of the present application is provided with a tooth damping liquid film forming gap on the engaging tooth, and an end cover covering the tooth damping liquid film forming gap on the end of the engaging tooth. The end cover and the tooth damping liquid film forming gap form a storage space of damping liquid. The damping liquid can form a damping liquid film in the narrow space of the tooth damping liquid film forming gap. When the vibration generated by the engagement of the engaging teeth is transmitted to the tooth damping liquid film forming gap, the tooth damping liquid film forming gap is extruded to deform and extrude the damping liquid film, so that the damping liquid flows in the tooth damping liquid film forming gap. Because the space of the tooth damping liquid film forming gap is narrow, the damping liquid will be subjected to greater friction resistance when extruded to flow, and the extruded oil film effect provides damping. Under the vibration excitation, the damping liquid repeatedly flows in the tooth damping liquid film forming gap, forming a continuous and stable damping force to convert the vibration energy into heat dissipation, thereby inhibiting the vibration of the engaging teeth, effectively reducing the safety hazard of the engagement transmission, and achieving the purpose of the present application.

[0019] The further effects of the above-mentioned optional mode will be described in the following combined with the specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a perspective view of the first embodiment of the present application.

[0021] Figure 2 It is a perspective view of the first embodiment of the present application. Figure 1 It is a front view of the end cover of the embodiment shown.

[0022] Figure 3 It is a front view of the embodiment shown. Figure 1 It is a front view of the embodiment shown.

[0023] Figure 4 It is a perspective view of the second embodiment of the present application.

[0024] The identification in the figure is as follows:

[0025] 101, engaging tooth; 102, tooth groove; 103, engaging tooth end; 104, end cover fixing screw hole; 105, base body;

[0026] 2, end cover; 201, oil injection hole; 202, end cover fixing hole; 203, oil outlet hole;

[0027] 301, tooth surface; 302, tooth crest surface; 303, tooth damping liquid film forming gap; 304, tooth surface; 305, tooth damping liquid film forming gap; 306, end cover mounting line; 307, tooth groove bottom; 308, groove damping liquid film forming gap;

[0028] 401, tooth damping liquid film forming gap; 402, tooth surface. DETAILED DESCRIPTION

[0029] Before the technical solutions of the present application are described in detail, some of the terms involved are uniformly explained.

[0030] Engaging tooth: the tooth of the engaging member protruding from the base, which is engaged with the tooth of the matching engaging member to transmit power, such as the gear tooth of a gear, the tooth of a rack, etc.

[0031] Base: the component of the engaging member, from which the engaging tooth protrudes, and which is connected with other components. An example of the base is the disc of a gear.

[0032] Tooth groove: the concave space between two engaging teeth, the bottom of which belongs to the base.

[0033] Tooth crest: the surface of the tooth crest part of the engaging tooth, which is pressed against the matching engaging tooth during engagement.

[0034] Tooth surface: the surface of the engaging tooth on both sides of the tooth crest, which is pressed against the matching engaging tooth during engagement.

[0035] Engaging tooth end: the two ends of the engaging tooth, which respectively intersect with the tooth crest and the tooth surface.

[0036] Tooth part damping liquid film forming gap: the long and narrow space provided on the engaging tooth, which can store damping liquid and form a damping liquid film therein.

[0037] Groove part damping liquid film forming gap: the long and narrow space provided in the base under the bottom of the tooth groove, which can store damping liquid and form a damping liquid film therein.

[0038] The technical solutions of the present application will be described in detail below in combination with the embodiments shown in the drawings.

[0039] Figures 1 to 3 The specific structure of the first embodiment of the present application is shown. The first embodiment of the engaging member of the present application is a gear. The gear includes a disc as the base 105 and gear teeth as the engaging teeth 101. The groove between two engaging teeth 101 is the tooth groove 102.

[0040] Reference Figure 1 and Figure 3 As can be seen, the engaging tooth 101 includes the tooth crest 302 and the tooth surfaces 301 and 304 connected with the tooth crest 302 on both sides of the tooth crest 302. The engaging tooth 101 has five surfaces, in addition to the tooth crest 302, the tooth surfaces 301 and 304, including two engaging tooth ends 103 at the ends of the gear. Four end cover fixing screw holes 104 are provided on the base 105 and are uniformly distributed in the circumferential direction.

[0041] Figure 2The specific structure of the end cap 2 in the first embodiment of the present invention is shown. The end cap 2 is a flat plate structure with a shape similar to the end of a gear. An oil filling hole 201, an end cap fixing hole 202, and an oil outlet hole 203 are also provided on the end cap 2. Combined with... Figure 1 and Figure 3 As can be seen, when end cap 2 is assembled onto the gear, the outer edge of the toothed end cap 2 is installed along the end cap mounting line 306, and the fixing screw passes through the end cap fixing hole 202 and screws into the end cap fixing screw hole 104, thereby fixing the end cap 2 to the meshing tooth end 103 of the gear. The end cap mounting line 306 can be a drawn line or a concave edge formed by a stepped structure. Figure 2 On the back of end cap 2 (not shown), a circular sealing ring is provided, which is concentric with the center of end cap 2. Figure 2 On the back of the end cap 2 (not shown), a sealing element is also provided, which is closed along the inner side of the toothed outer edge of the end cap 2. The aforementioned annular sealing ring and sealing element form a fluid storage space between the end cap 2 and the end of the gear (including the meshing tooth end 103). Damping fluid can be injected into the fluid storage space through the oil injection hole 201, and the damping fluid in the fluid storage space can be discharged through the oil outlet hole 203.

[0042] refer to Figure 3 As can be seen, tooth damping liquid film forming gaps 303 and 305 are provided on the meshing teeth 101; and groove damping liquid film forming gaps 308 are provided at the bottom of the tooth groove 102 adjacent to the base 105. Figure 3 As shown, at the end of the gear, or on a cross-section parallel to the end of the gear, the tooth damping liquid film forming gap forms a closed tooth gap pattern, and the groove damping liquid film forming gap forms a closed groove gap pattern. The long axis of the closed tooth gap pattern (or the groove gap closed pattern in other embodiments) has arc-shaped turning angles at both ends to reduce stress concentration effects. In this embodiment, since the tooth damping liquid film forming gap 305 is connected to the adjacent groove damping liquid film forming gap 308, the two together form a closed pattern. The above structure makes the tooth damping liquid film forming gap form a narrow slit that penetrates the meshing tooth 101 between the ends 103 of the two meshing teeth, in which the damping liquid can form a damping liquid film. Similarly, the groove damping liquid film forming gap 308 penetrates the base 105 along the direction of the line connecting the ends 103 of the two meshing teeth, forming a narrow slit in the base 105 to accommodate the damping liquid film. The tooth damping liquid film forming gap 303, the tooth damping liquid film forming gap 305 and the groove damping liquid film forming gap 308 are all connected to the liquid storage space, so that the damping liquid film can flow bidirectionally with the liquid storage space at any time.

[0043] from Figure 3It can be seen that the long axis of the tooth gap closure pattern formed by the tooth damping liquid film forming gap 303 is a curve, which protrudes towards the curve formed by the tooth top surface 302 (in Figure 3 When vibration occurs at the tooth top surface 302, the tooth damping liquid film forming gap 303 will deform, extruding the damping liquid to form an extrusion oil film effect to generate damping force for vibration reduction. At the same time, the protruding structure forms a semicircular arch structure with a certain central angle, so that any direction of the meshing impact generated near the tooth top surface 302 can be damped by the damping liquid film, and the arch structure has better elasticity, which can provide elastic support and play the role of spring vibration isolation to further enhance the damping effect.

[0044] The long axis of the tooth gap closure pattern formed by the two tooth damping liquid film forming gaps 305 also forms two curves, which are parallel to the curves formed by the two tooth surfaces 301. Figure 3 As can be seen from the curves formed by the tooth surfaces 301 or 304, a normal line is drawn at any point on the curve, which intersects at least one tooth damping liquid film forming gap. Similarly, a normal line is drawn at any point on the curve formed by the tooth top surface 302, which intersects at least one tooth damping liquid film forming gap. A normal line is drawn at any point on the curve formed by the tooth groove bottom 307, which intersects the tooth damping liquid film forming gap 308. The above arrangement makes the meshing tooth 101 in the meshing process, any meshing point vibration can be damped by the tooth damping liquid film forming gap or the tooth damping liquid film forming gap intersecting the normal line of the point, effectively reducing the safety hazard of meshing transmission.

[0045] Figure 4 A second embodiment of the meshing component of the present application is shown, which is a helical gear. As can be seen from Figure 4 The helical gear has tooth surfaces 402 and tooth damping liquid films 401 with the same name and function as the first embodiment. In fact, the difference between the two embodiments is that the first embodiment is a spur gear and the second embodiment is a helical gear. Through the description of the first embodiment, those skilled in the art can understand that Figure 4 The second embodiment shown is achievable.

[0046] Similarly, through the description of the first embodiment, those skilled in the art can understand that the technical solution of the present application can also be applied to straight toothed racks and helical toothed racks.

[0047] It is to be noted that the above-mentioned embodiments illustrate rather than limit the application, and that those skilled in the art will be able to design many alternative embodiments without departing from the scope of the appended claims. Accordingly, the legal scope of the application is defined only by the appended claims.

Claims

1. An engaging member comprising a base and engaging teeth protruding from the base, the engaging teeth comprising a tooth top surface and tooth surfaces provided on both sides of the tooth top, a tooth groove being provided between two of the engaging teeth, and a tooth end portion being provided at both ends of the engaging teeth and intersecting the tooth top surface and the tooth surfaces, characterized in that: A tooth damping liquid film forming gap is arranged on the engaging tooth; the tooth damping liquid film forming gap penetrates the engaging tooth between two end portions of the engaging tooth; an end cover is arranged on the end portion of the engaging tooth to cover the tooth damping liquid film forming gap; In a cross section parallel to the end cover, the tooth damping liquid film forming gap forms a tooth gap closing figure; The number of the tooth gap closing figure is greater than 1; In the cross section, the tooth gap closing figure includes a curve convex to the tooth top surface with a long axis; Any normal line of a curve formed by the tooth surface in the cross section intersects at least one tooth gap closing figure; Any normal line of a curve formed by the tooth top surface in the cross section intersects at least one tooth gap closing figure; In the cross section, the tooth gap closing figure includes a curve with a long axis parallel to the curve formed by the tooth surface.

2. The engaging member according to claim 1, wherein: A groove damping liquid film forming gap is arranged on the base body adjacent to the tooth groove; the groove damping liquid film forming gap penetrates the base body along the direction of the line connecting two end portions of the engaging tooth; In the cross section parallel to the end cover, the groove damping liquid film forming gap forms a groove gap closing figure.

3. The engaging member according to claim 2, wherein: Any normal line of a curve formed by the bottom of the tooth groove in the cross section intersects at least one groove gap closing figure.

4. The engaging member according to claim 1, wherein: A sealing member is arranged between the end cover and the end portion of the engaging tooth; the end cover, the end portion of the engaging tooth and the sealing member form a liquid storage space; the liquid storage space is in communication with the tooth damping liquid film forming gap.

5. The engaging member according to claim 1, wherein: The engaging member includes a spur gear, a helical gear, a spur gear rack and a helical gear rack.

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