Face gear transmission mechanism and working method thereof

Abstract

The invention belongs to the technical field of transmission machinery, and particularly relates to a face gear transmission mechanism and a working method thereof.The face gear transmission mechanism comprises an input shaft, an intermediate shaft system and an output shaft system which are in transmission fit; the intermediate shaft system comprises a first face gear, an intermediate shaft and a second cylindrical gear, the first face gear is mounted in the middle of the intermediate shaft, and the second cylindrical gear is mounted at the tail end of the intermediate shaft; the first face gear is connected with the tail end of the input shaft in a matched mode to form a first-stage face gear transmission pair. The output shaft system comprises a second face gear and an output shaft, and the second face gear is installed at the front end of the output shaft. Wherein the second face gear and the second cylindrical gear are meshed with each other to form a second-stage face gear transmission pair; compared with cylindrical and bevel gear transmission, under the same transmission ratio, the face gear transmission mechanism is few in transmission stage number, the reliability of a transmission system is improved, the overall size of the transmission mechanism is reduced, and the structure is more compact.

Description

Technical Field

[0001] The invention belongs to the technical field of transmission machinery, and in particular relates to a face gear transmission mechanism and a working method thereof. Background Art

[0002] Gear transmission mechanisms are widely used in various industrial transmission equipment. They can reduce the speed and increase the torque. They generally include single-stage transmission and multi-stage transmission. Since the transmission ratio of single-stage transmission is limited, in some application scenarios where the speed needs to be greatly reduced and the torque needs to be increased, such as in lifting equipment in the petroleum, coal, shipping and other industries, multi-stage transmission is required to obtain a larger transmission ratio and improve its lifting capacity.

[0003] The existing multi-stage gear transmission generally adopts cylindrical gear transmission or bevel gear transmission, but the traditional cylindrical gear transmission or bevel gear transmission with large transmission ratio has the disadvantages of more stages, larger overall size and low flexibility; the specific reasons are analyzed as follows: The transmission ratio of each stage in the existing multi-stage gear transmission cannot be too large. If the transmission ratio of a certain stage is too large, it will cause excessive bending stress on the root of the pinion tooth and cause the root of the tooth to break. Secondly, too large a transmission ratio will also cause uneven load distribution between the gears of each stage, and produce a large impact load on the gears of the subsequent transmission levels, affecting the stability and reliability of the entire transmission system. In addition, when the transmission ratio of a certain stage is too large, the slight error of the previous stage gear will produce a large motion error when it is output to the last stage after being transmitted through a larger transmission ratio, thereby affecting the output accuracy. At the same time, it is very easy to excite the resonance of the system, generate vibration and noise, and thus reduce the working efficiency and service life of the transmission system. For example: hoisting equipment often uses cylindrical gears or bevel gear transmission mechanisms of four or more stages or even more, resulting in a huge overall structure of the transmission mechanism, and when any stage of the transmission component fails, it will affect the safety and reliability of the entire transmission mechanism. Summary of the invention

[0004] In view of the technical problems existing in the prior art, the present invention provides a face gear transmission mechanism and a working method thereof to solve the technical problems of traditional large transmission ratio cylindrical gear transmission or bevel gear transmission having a large number of stages, a large overall size and low flexibility.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: The present invention provides a face gear transmission mechanism, comprising an input shaft, an intermediate shaft system and an output shaft system in transmission cooperation; The intermediate shaft system includes a first face gear, an intermediate shaft and a second cylindrical gear, wherein the first face gear is mounted at the middle portion of the intermediate shaft, and the second cylindrical gear is mounted at the end of the intermediate shaft; wherein the first face gear is connected with the end of the input shaft to form a first-stage face gear transmission pair; The output shaft system includes a second face gear and an output shaft, wherein the second face gear is mounted at the front end of the output shaft; wherein the second face gear and the second cylindrical gear are meshed with each other to form a second-stage face gear transmission pair.

[0006] Furthermore, the input shaft includes an input shaft body and a first cylindrical gear arranged at the end of the input shaft body, and the first cylindrical gear and the first face gear are meshed with each other; wherein the first cylindrical gear and the input shaft body are an integrated structure.

[0007] Furthermore, a shaft shoulder is provided at a middle portion of the intermediate shaft, and the first face gear is fixedly connected to the shaft shoulder via bolts.

[0008] Furthermore, the second cylindrical gear is installed on the end of the intermediate shaft through a clamping sleeve; wherein the second cylindrical gear and the clamping sleeve are fixed with bolts.

[0009] Furthermore, the second face gear and the output shaft are fixed by bolts.

[0010] Furthermore, the transmission ratio of the face gear transmission mechanism is the product of the transmission ratio of the first-stage face gear transmission pair and the transmission ratio of the second-stage face gear transmission pair.

[0011] Furthermore, the transmission ratio of the face gear transmission mechanism is:

[0012] in, is the transmission ratio of the face gear transmission mechanism; is the number of teeth of the first cylindrical gear; is the number of gear teeth on the first face; is the number of teeth of the second cylindrical gear; is the number of teeth on the second face gear.

[0013] Furthermore, the axis of the input shaft is coaxially arranged with the axis of the output shaft system.

[0014] Furthermore, the axis of the input shaft coincides with, is arranged orthogonally or obliquely with the axis of the output shaft system.

[0015] The present invention also provides a working method of the face gear transmission mechanism, comprising: When power is input to the input shaft, the input shaft drives the first face gear to rotate, which in turn drives the intermediate shaft and the second cylindrical gear to rotate; Then, the second cylindrical gear meshes with the second face gear to transmit power to the second face gear; Finally, the power is output through the output shaft.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The face gear transmission mechanism provided by the present invention cooperates the first face gear on the intermediate shaft system with the input shaft to form a first-stage face gear transmission pair, and meshes the second face gear on the intermediate shaft system with the second cylindrical gear on the output shaft system to form a second-stage face gear transmission pair, thereby forming a transmission mechanism with two-stage face gear transmission pairs. Due to the high meshing accuracy and load-bearing capacity of the face gears, the transmission ratio value range of each stage of the face gear transmission pair is wide, which can effectively improve the total transmission ratio of the transmission mechanism and has high flexibility. Compared with cylindrical and bevel gear transmissions, under the same transmission ratio, the face gear transmission mechanism has fewer transmission stages, which improves the reliability of the transmission system, reduces the overall size of the transmission mechanism, and makes the structure more compact.

[0017] Furthermore, compared with multi-stage cylindrical and conical transmission structures, under the same transmission ratio and load-bearing capacity requirements, the face gear transmission mechanism has fewer stages, a more compact structure, and occupies less space, which is beneficial to the overall layout and miniaturization design of the equipment, and has obvious application advantages in equipment with limited space; at the same time, the face gear transmission mechanism does not require high installation accuracy, and can meet the needs of flexible changes in the output angles of the input and output shafts. It can not only realize the transmission mode of the coaxial input and output shafts, but also realize orthogonal and oblique angular transmission modes. It has broad application prospects in transmission mechanisms that have high requirements for spatial layout and transmission flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the three-dimensional structure of the face gear transmission mechanism provided in Example 1; Figure 2 is a schematic structural diagram of the intermediate shaft system in Example 1; Figure 3 is a schematic diagram of the structure of the output shaft system in Example 1; Figure 4Schematic diagram of the structure of the first-stage face gear transmission pair in Example 1; Figure 5 Schematic diagram of the structure of the second-stage face gear transmission pair in Example 1; Figure 6 This is a schematic diagram of the three-dimensional structure of the face gear transmission mechanism provided in Example 2.

[0020] Among them, 1 is the input shaft, 2 is the intermediate shaft system, 3 is the output shaft system; 4 is the input shaft axis, 5 is the intermediate shaft system axis, 6 is the output shaft axis; 11 is the first cylindrical gear teeth; 21 is the first face gear, 22 is the first bolt group, 23 is the intermediate shaft, 24 is the second cylindrical gear, 25 is the expansion sleeve; 211 is the first face gear threaded hole, 212 is the first face gear teeth; 231 is the first face gear mounting hole; 241 is the gear inner hole, 242 is the second cylindrical gear teeth; 31 is the second bolt group, 32 is the second face gear, 33 is the output shaft; 321 is the second face gear threaded hole, 322 is the second face gear teeth; 331 is the second face gear mounting hole. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects solved by this application clearer, the technical solutions in the embodiments of this application will be described clearly and completely in combination with the drawings in the embodiments of this application; obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0022] The face gear transmission mechanism of the present invention comprises an input shaft, an intermediate shaft system and an output shaft system; the input shaft is an integrated structure of a cylindrical gear and a shaft; the first face gear in the intermediate shaft system is fixed on the shaft shoulder of the intermediate shaft through a first bolt group, and the second cylindrical gear is connected to the intermediate shaft through a tightening sleeve; the second face gear in the output shaft system is installed on the output shaft through a second bolt group, the input shaft meshes with the first face gear to form a first-stage face gear transmission pair, and the second cylindrical gear meshes with the second face gear to form a second-stage face gear transmission pair; a two-stage face gear transmission structure is adopted, and the transmission ratio range of each stage is wide and the total transmission ratio is large. Compared with cylindrical and bevel gear transmission, under the same transmission ratio, the number of transmission stages is small, the reliability of the transmission system is improved, the overall size of the transmission mechanism is reduced, and the structure is more compact.

[0023] Example 1 As attached Figure 1-5 As shown, this embodiment 1 provides a face gear transmission mechanism, including an input shaft 1, an intermediate shaft system 2 and an output shaft system 3 for transmission matching; wherein the axis of the input shaft 1 and the axis of the output shaft system 3 are arranged to coincide with each other.

[0024] The input shaft 1 includes an input shaft body and a first cylindrical gear, the front end of the input shaft body serves as a power input end, and the first cylindrical gear is arranged at the end of the input shaft body; wherein, the first cylindrical gear is used to mesh with the first face gear 21 in the intermediate shaft system 2; preferably, the input shaft body and the first cylindrical gear are an integrated structure; the input shaft 1 adopts an integrated structure of the input shaft body and the first cylindrical gear, which effectively reduces the number of parts and makes the transmission mechanism more compact; at the same time, it avoids assembly errors between gears and shafts and improves transmission accuracy.

[0025] The intermediate shaft system 2 includes a first face gear 21, a first bolt group 22, an intermediate shaft 23, a second cylindrical gear 24 and a tightening sleeve 25. Figure 2 shown.

[0026] The first face gear 21 is installed at the middle portion of the intermediate shaft 23 through the first bolt group 22 .

[0027] Specifically, the first face gear 21 is provided with first face gear threaded holes 211 evenly distributed around the circumference; a shaft shoulder is provided at the middle portion of the intermediate shaft 23, and the shaft shoulder is provided with first face gear mounting holes 231 evenly distributed around the circumference; wherein, the first face gear threaded holes 211 and the first face gear mounting holes 231 are arranged in a one-to-one correspondence; the first bolt group 22 includes a plurality of first bolts, and the plurality of first bolts sequentially penetrate the first face gear mounting holes 231 and the first face gear threaded holes 211 to fix the first face gear 21 on the intermediate shaft 23.

[0028] The second spur gear 24 is mounted on the end of the intermediate shaft 24 via the expansion sleeve 25 .

[0029] Specifically, a gear inner hole 241 is set at the center of the second cylindrical gear 24, and the expansion sleeve 25 is coaxially assembled in the gear inner hole 241 of the second cylindrical gear 24 to form a cylindrical gear combination structure. The cylindrical gear combination is installed as a whole at the end of the intermediate shaft 23 to realize the assembly of the second cylindrical gear 24 and the intermediate shaft 23; the expansion sleeve 25 is used to assemble and fix the second cylindrical gear 24, and there is no need to set a keyway on the intermediate shaft 23, so as to avoid the influence of the keyway processing on the intermediate shaft 23 on the strength of the shaft body, and at the same time, quick installation can be achieved, and the second cylindrical gear 24 can be quickly moved and rotated along the axis of the intermediate shaft 23.

[0030] The output shaft system 3 includes a second bolt group 31, a second face gear 32 and an output shaft 33. Figure 3 As shown; the second face gear 32 is installed at the front end of the output shaft 33 through the second bolt group 31, and the end of the output shaft 33 serves as the power output end.

[0031] Specifically, the second face gear 32 is provided with second face gear threaded holes 321 evenly distributed around the circumference, and the front end of the output shaft 33 is provided with second face gear mounting holes 331 evenly distributed around the circumference; wherein the second face gear threaded holes 321 and the second face gear mounting holes 331 are arranged in a one-to-one correspondence; the second bolt group 31 includes a plurality of second bolts, and the plurality of second bolts sequentially penetrate the second face gear threaded holes 321 and the second face gear mounting holes 331 to fix the second face gear 32 on the front end of the output shaft 33.

[0032] In this embodiment 1, the first face gear 21 is connected with the end of the input shaft 1 to form a first-stage face gear transmission pair. Figure 4 ; Specifically, the first face gear 21 is meshed with the first cylindrical gear on the input shaft 1; wherein the transmission ratio of the first-stage face gear transmission pair is:

[0033] in, is the transmission ratio of the first-stage face gear transmission pair; is the number of teeth of the first cylindrical gear; is the number of the first face gear teeth 212 .

[0034] In this embodiment 1, the second face gear 32 and the second cylindrical gear 24 mesh with each other to form a second-stage face gear transmission pair. Figure 5 As shown; wherein the transmission ratio of the second-stage face gear transmission pair is:

[0035] in, is the transmission ratio of the second-stage face gear transmission pair; is the number of the second cylindrical gear teeth 242; is the number of the second face gear teeth 322 .

[0036] The transmission ratio of the face gear transmission mechanism is the product of the transmission ratio of the first-stage face gear transmission pair and the transmission ratio of the second-stage face gear transmission pair; wherein the transmission ratio of the face gear transmission mechanism is:

[0037] in, is the transmission ratio of the face gear transmission mechanism; is the number of teeth of the first cylindrical gear; is the number of gear teeth on the first face; is the number of teeth of the second cylindrical gear; is the number of teeth on the second face gear.

[0038] Working principle and transmission process: The face gear transmission mechanism described in this embodiment 1 realizes power transmission through a two-stage face gear transmission pair; first, when the input shaft has power input, the input shaft 1 drives the first face gear 21 to rotate, thereby driving the intermediate shaft 23 and the second cylindrical gear 24 to rotate; then, the second cylindrical gear 24 engages with the second face gear 32 to transmit power to the second face gear 32, and finally outputs power through the output shaft 33.

[0039] Specifically, the working principle of the face gear transmission mechanism described in this embodiment 1 is as follows: (1) Power input: The power is first introduced into the transmission mechanism through the input shaft 1; the end of the input shaft 1 is connected to the first face gear 21 through the first cylindrical gear, serving as the power input point of the transmission mechanism.

[0040] (2) First stage face gear transmission: The rotational power of the input shaft 1 is transmitted to the first face gear 21 through the first cylindrical gear. Since the first face gear 21 is installed in the middle of the intermediate shaft 23, when the first face gear 21 is driven by the input shaft 1 to rotate, it drives the entire intermediate shaft 23 to rotate together.

[0041] (3) Intermediate shaft transmission: The intermediate shaft 23 starts to rotate after being driven by the first face gear 21 . Since the second cylindrical gear 24 is installed at the end of the intermediate shaft 23 , the rotation of the intermediate shaft 23 will drive the second cylindrical gear 24 to rotate together.

[0042] (4) Second stage face gear transmission: The rotational power of the second cylindrical gear 24 is then transmitted to the second face gear 32 meshing therewith; the second face gear 32 is mounted on the front end of the output shaft 33; therefore, when the second cylindrical gear 24 rotates, the second face gear 32 is driven to rotate.

[0043] (5) Output power: The rotational power of the second face gear 32 is finally outputted through the output shaft 33 ; at this point, the entire face gear transmission mechanism completes the power transmission process from the input shaft 1 to the output shaft 33 .

[0044] The face gear transmission mechanism described in this embodiment 1 has the advantages of high meshing accuracy and high load-bearing capacity of face gears. In multi-stage transmission, the transmission ratio of each stage of the face gear transmission pair has a wide range of values. Moreover, when the transmission ratio of each stage of the face gear transmission pair takes a larger value, it will not cause problems such as tooth root breakage, uneven load distribution between gears of various stages, and large motion errors. Therefore, the first-stage transmission ratio and the second-stage transmission ratio in the face gear transmission mechanism can both take larger values, so that the total transmission ratio obtained is relatively large. In application scenarios that require large transmission, the face gear transmission mechanism can achieve a total transmission ratio of four or more cylindrical and bevel gear transmissions, which can effectively reduce the number of transmission stages, improve the reliability of the transmission system, reduce the overall size of the transmission mechanism, and make the structure more compact.

[0045] It should be noted that, by taking advantage of the wide range of face gear transmission ratios, the relationship between the transmission ratios of the first-stage face gear transmission and the transmission ratios of the second-stage face gear transmission is reasonably set, so that the input shaft 1 and the output shaft 33 are arranged coaxially and rotate in the same direction; its structural form is similar to that of planetary gear transmission, and the overall structure is compact and simple, which can effectively reduce space occupation, and while improving space utilization, it also creates favorable conditions for miniaturized design and efficient and stable operation of the transmission mechanism. Due to the flexibility of face gear transmission, the cylindrical gear can be arranged at any position in the circumferential direction of the face gear, and the face gear transmission is insensitive to the axial installation error of the cylindrical gear, allowing the cylindrical gear to have slight axial changes.

[0046] Example 2 The structure and principle of the face gear transmission mechanism provided in this embodiment 2 are basically the same as those of the face gear transmission mechanism provided in the above embodiment 1; the difference is that the axis of the input shaft 1 is arranged orthogonally or obliquely with the axis of the output shaft system 3, as shown in the attached Figure 6 shown.

[0047] It should be noted that the transmission ratio will not change when the input shaft 1 moves slightly along the direction of its axis A, the first cylindrical gear 24 moves slightly along the direction of the axis B of the intermediate shaft 23, the axis A of the input shaft 1 rotates relative to the axis of the intermediate shaft 23, and the axis of the output shaft system 3 rotates relative to the axis of the intermediate shaft 23; therefore, the face gear transmission mechanism described in embodiments 1 and 2 does not require high installation accuracy, effectively reducing the difficulty of debugging the accuracy during the assembly process, and reducing the risk of equipment failure caused by installation errors; at the same time, the face gear transmission structure can meet the demand for flexible change of the output angle of the output shaft, not only can it realize the transmission mode of the coaxial line and the same direction of the input and output shafts, but also can realize orthogonal and oblique angular transmission modes, and has broad application prospects in transmission mechanisms with high requirements on spatial layout and transmission flexibility.

[0048] The face gear transmission mechanism described in the present invention adopts a two-stage face gear transmission structure, with a wide transmission ratio range for each stage and a large total transmission ratio. Compared with cylindrical and bevel gear transmissions, it has fewer transmission stages under the same transmission ratio, which improves the reliability of the transmission system, reduces the overall size of the transmission mechanism, and makes the structure more compact. Due to the flexibility of the face gear transmission, the face gear transmission mechanism can realize the coaxial layout of the input shaft and the output shaft and rotate in the same direction. The overall structure is simple and compact, which can effectively reduce space occupancy, and while improving space utilization, it also creates favorable conditions for the miniaturized design and efficient and stable operation of the transmission mechanism. At the same time, the face gear transmission mechanism can meet the demand for flexible change of the output angle of the output shaft, and can not only realize the transmission mode of the coaxial line and the same direction of rotation of the input and output shafts, but also realize orthogonal and oblique angular transmission modes. It has broad application prospects in transmission mechanisms with high requirements for spatial layout and transmission flexibility.

[0049] In the present invention, since the face gear transmission is insensitive to the axial installation error of the cylindrical gear, the present invention does not require high installation accuracy, effectively reducing the difficulty of debugging the accuracy during the assembly process, and at the same time reducing the risk of equipment failure caused by installation errors.

[0050] The above embodiment is only one of the implementation methods that can realize the technical solution of the present invention. The scope of protection claimed by the present invention is not limited only to this embodiment, but also includes changes, replacements and other implementation methods that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention.

Claims

1. A face gear transmission mechanism, characterized in that: It includes an input shaft (1), an intermediate shaft system (2) and an output shaft system (3) that are in transmission cooperation; The intermediate shaft system (2) comprises a first face gear (21), an intermediate shaft (23) and a second cylindrical gear (24), wherein the first face gear (21) is mounted at the middle portion of the intermediate shaft (23), and the second cylindrical gear (24) is mounted at the end of the intermediate shaft (23); wherein the first face gear (21) is coupled to the end of the input shaft (1) to form a first-stage face gear transmission pair; The output shaft system (3) comprises a second face gear (32) and an output shaft (33), wherein the second face gear (32) is mounted on the front end of the output shaft (33); wherein the second face gear (32) and the second cylindrical gear (24) are meshed with each other to form a second-stage face gear transmission pair.

2. A face gear transmission mechanism according to claim 1, characterized in that: The input shaft (1) comprises an input shaft body and a first cylindrical gear arranged at the end of the input shaft body, the first cylindrical gear and the first face gear (21) meshing with each other; wherein the first cylindrical gear and the input shaft body are an integrated structure.

3. A face gear transmission mechanism according to claim 1, characterized in that: A shaft shoulder is provided at a middle portion of the intermediate shaft (23), and the first face gear (21) is fixedly connected to the shaft shoulder via bolts.

4. A face gear transmission mechanism according to claim 1, characterized in that: The second cylindrical gear (24) is mounted on the end of the intermediate shaft (23) via a tightening sleeve (25); wherein the second cylindrical gear (24) and the tightening sleeve (25) are fixed by bolts.

5. The face gear transmission mechanism according to claim 1, characterized in that: The second face gear (32) and the output shaft (33) are fixed by bolts.

6. A face gear transmission mechanism according to claim 1, characterized in that: The transmission ratio of the face gear transmission mechanism is the product of the transmission ratio of the first-stage face gear transmission pair and the transmission ratio of the second-stage face gear transmission pair.

7. A face gear transmission mechanism according to claim 2, characterized in that: The transmission ratio of the face gear transmission mechanism is: in, is the transmission ratio of the face gear transmission mechanism; is the number of teeth of the first cylindrical gear; is the number of gear teeth on the first face; is the number of teeth of the second cylindrical gear; is the number of teeth on the second face gear.

8. The face gear transmission mechanism according to claim 1, characterized in that: The axis of the input shaft (1) is coaxially arranged with the axis of the output shaft system (3).

9. The face gear transmission mechanism according to claim 1, characterized in that: The axis of the input shaft (1) coincides with, is arranged orthogonally or obliquely with the axis of the output shaft system (3).

10. The working method of the face gear transmission mechanism according to any one of claims 1 to 9, characterized in that: include: When power is input to the input shaft (1), the input shaft (1) drives the first face gear (21) to rotate, thereby driving the intermediate shaft (23) and the second cylindrical gear (24) to rotate; Then, the second cylindrical gear (24) and the second face gear (32) mesh with each other to transmit power to the second face gear (32); Finally, the power is output through the output shaft (33).

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