阅读说明：本技术 一种齿轮箱输出联轴节、齿轮箱及低地板轨道车辆 (Gear box output coupling, gear box and low-floor railway vehicle ) 是由 刘莹 魏世晨 周骥 孙静明 陈瑞兴 于 2021-10-14 设计创作，主要内容包括：本发明的实施例提供了一种齿轮箱输出联轴节、齿轮箱及低地板轨道车辆,涉及轨道交通技术领域。齿轮箱输出联轴节包括空心轴、第一橡胶环和车轮侧法兰。空心轴具有相对的第一端和第二端,第二端用于与输出齿轮传动连接,第一端通过第一橡胶环与车轮侧法兰柔性连接,第一橡胶环可实现对位移和角度差的补偿。第一橡胶环包括金属块和橡胶部,多个金属块沿圆周方向间隔分布,橡胶部硫化成型于相邻两个金属块之间,如此第一橡胶环为一体式结构,便于安装,安装后不易出现不对中、不对心的问题,进而有助于提高承载能力。多个金属块中的部分与第一端固定连接,多个金属块中的其余部分与车轮侧法兰连接,从而实现车轮侧法兰与空心轴的柔性连接。(The embodiment of the invention provides a gearbox output coupling, a gearbox and a low-floor railway vehicle, and relates to the technical field of rail transit. The gearbox output coupling includes a hollow shaft, a first rubber ring and a wheel side flange. The hollow shaft has relative first end and second end, and the second end is used for being connected with output gear drive, and first end is through first rubber ring and wheel side flange flexonics, and first rubber ring can realize the compensation to displacement and angle difference. First rubber ring includes metal block and rubber portion, and a plurality of metal blocks are along circumferencial direction interval distribution, and rubber portion vulcanizes the shaping between two adjacent metal blocks, and so first rubber ring formula structure as an organic whole is convenient for install, is difficult for appearing after the installation centering, not the problem of heart, and then helps improving bearing capacity. And parts of the metal blocks are fixedly connected with the first end, and the rest parts of the metal blocks are connected with the wheel side flange, so that the flexible connection between the wheel side flange and the hollow shaft is realized.)

1. A gearbox output coupling for effecting power transfer between an output gear (228) and a wheel (20), said gearbox output coupling (100) comprising:

a hollow shaft (110), said hollow shaft (110) having opposing first (111) and second (112) ends, said second end (112) for driving connection with said output gear (228);

a wheel-side flange (120), the wheel-side flange (120) being adapted to be in driving connection with the wheel (20); and

a first rubber ring (131), through which the wheel-side flange (120) is flexibly connected with the first end (111);

the first rubber ring (131) comprises metal blocks (133) and rubber parts (137), the metal blocks (133) are distributed at intervals in the circumferential direction, the rubber parts (137) are vulcanized and molded between every two adjacent metal blocks (133), parts of the metal blocks (133) are fixedly connected with the first end (111), and the rest parts of the metal blocks (133) are connected with the wheel side flange (120).

2. A gearbox output coupling according to claim 1, wherein said first end (111) has a plurality of first connecting arms (113) distributed along the circumference of said hollow shaft (110), and said first connecting arms (113) extend in the radial direction of said hollow shaft (110); the wheel-side flange (120) has a plurality of second connecting arms (121) distributed along the circumferential direction of the wheel-side flange (120), and the second connecting arms (121) extend in the radial direction of the wheel-side flange (120); the plurality of first connecting arms (113) and the plurality of second connecting arms (121) are arranged in a staggered mode, and the radial outer ends of the first connecting arms (113) and the radial outer ends of the second connecting arms (121) are located on the radial inner side of the first rubber ring (131).

3. A gearbox output coupling according to claim 2, wherein each of said metal blocks (133) is provided with a through hole (136) extending in a radial direction of said rubber ring (130), said through hole (136) being adapted for the passage of a bolt, each of said first connecting arm (113) and said first connecting arm (121) being threadably secured to a respective one of said bolts.

4. A gearbox output coupling according to claim 3, characterised in that the radially outer end of the metal block (133) is provided with a notch (134), the notch (134) being adapted to receive the head of the bolt.

5. A gearbox output coupling according to claim 2, wherein a radially inner side of each said metal block (133) is provided with a groove (135), a radially outer end of each said first connecting arm (113) and a radially outer end of each said second connecting arm (121) are provided with a boss (115), and said bosses (115) engage with said grooves (135) in a one-to-one correspondence.

6. Gearbox output coupling according to claim 1, characterised in that the wheel-side flange (120) is provided with a first end-face toothing (123) on the side facing away from the hollow shaft (110) in the axial direction of the hollow shaft (110), the first end-face toothing (123) being intended for engagement with a second end-face toothing (21) of the wheel (20), and that the wheel-side flange (120) is fixedly connected to the wheel (20) by means of bolts extending in the axial direction of the wheel-side flange (120).

7. A gearbox output coupling according to any of claims 1 to 6, characterised in that said gearbox output coupling (100) further comprises a non-wheel side flange (140), said non-wheel side flange (140) being provided at one axial end with first face teeth (141), said second end (112) being provided with second face teeth (116), said first face teeth (141) meshing with said second face teeth (116); the non-wheel-side flange (140) is fixedly connected to the hollow shaft (110) by bolts extending in the axial direction of the hollow shaft (110).

8. Gearbox output coupling according to claim 7, characterised in that the gearbox output coupling (100) further comprises a gearbox connection disc (150) and a second rubber ring (132), the gearbox connection disc (150) and the non-wheel side flange (140) being flexibly connected by the second rubber ring (132);

the side of the gearbox connecting disc (150) facing the first end (111) is provided with third end face teeth (151), the third end face teeth (151) being for meshing with fourth end face teeth (229) on the output gear (228).

9. A gearbox output coupling according to claim 8, wherein said non-wheel side flange (140) has a plurality of third coupling arms (142) in a circumferential direction, said gearbox coupling plate (150) has a plurality of fourth coupling arms (152) in a circumferential direction, said third coupling arms (142) and said fourth coupling arms (152) are staggered and located radially inward of said second rubber ring (132); the third connecting arms (142) and the fourth connecting arms (152) are connected to the second rubber ring (132) by bolts extending in the radial direction of the second rubber ring (132), respectively;

each radial outer end of the third connecting arm (142) and each radial outer end of the fourth connecting arm (152) are provided with bosses (115), the radial inner side of each metal block (133) of the second rubber ring (132) is provided with a groove (135), and the bosses (115) are correspondingly clamped with the grooves (135) one to one.

10. A gearbox characterized in that said gearbox (10) comprises an output gear (228) and a gearbox output coupling (100) as defined in any one of claims 1 to 9, said output gear (228) being drivingly connected to a second end (112) in said gearbox output coupling (100).

11. The gearbox according to claim 10, characterized in that the gearbox (10) further comprises a casing (210), the casing (210) comprising a first casing part (211) and a second casing part (212) connected to each other, and mating surfaces of the first casing part (211) and the second casing part (212) are arranged at an angle to a horizontal plane, and the mating surfaces pass through an axis of the output gear (228).

12. A low-floor rail vehicle, characterized in that it comprises a wheel (20) and a gearbox (10) according to claim 10 or 11, the wheel (20) being in driving connection with the wheel-side flange (120).

Technical Field

The invention relates to the technical field of rail transit, in particular to a gearbox output coupling, a gearbox and a low-floor rail vehicle.

Background

The low-floor rail vehicle is a low-carbon and environment-friendly rail traffic operation mode, the general structure of a bogie is complex, the space is compact, the design space reserved for a gear box is very limited, the gear box generally comprises a gear transmission structure and an input and output coupling, the gear box is a key component of the bogie, the gear box plays a role in transmitting the torque and the rotating speed of a motor and driving wheels, and the coupling can compensate the displacement and the angle difference between the wheels and a framework caused by the change of the primary suspension displacement of the bogie, so that the vehicle can run more stably and comfortably.

In the existing low-floor rail vehicle, the output rubber coupling device comprises a wedge-shaped rubber block and a trapezoid connecting block. Wedge rubber piece and trapezoidal connecting block all follow the location through the petal of being connected of locating pin and connecting seat, and the installation is comparatively complicated, and easy because installation processing or installation arouse not centering, the problem of decentraction influences whole bearing performance.

Disclosure of Invention

The invention aims to provide a gearbox output coupling which can solve the technical problems that an output rubber coupling is complex to install and easily causes misalignment and misalignment in the prior art.

The invention also aims to provide a gearbox, which can solve the technical problems that the output rubber coupling is complex to install and is easy to cause misalignment and misalignment in the prior art.

The invention also aims to provide a low-floor rail vehicle which can solve the technical problems that an output rubber coupling is complex to install and is easy to cause misalignment and misalignment in the prior art.

Embodiments of the invention may be implemented as follows:

an embodiment of the present invention provides a gearbox output coupling for enabling power transmission between an output gear and a wheel, the gearbox output coupling comprising: a hollow shaft having opposite first and second ends, the second end for driving connection with the output gear; the wheel side flange is used for being in transmission connection with the wheel; the wheel side flange is flexibly connected with the first end through the first rubber ring;

the first rubber ring comprises metal blocks and rubber parts, the metal blocks are distributed at intervals in the circumferential direction, the rubber parts are vulcanized and formed between every two adjacent metal blocks, the metal blocks are fixedly connected with the first end, and the rest metal blocks are connected with the wheel side flange.

Optionally, the first end has a plurality of first connecting arms distributed along the circumferential direction of the hollow shaft, and the first connecting arms extend along the radial direction of the hollow shaft; the wheel-side flange has a plurality of second connecting arms distributed along a circumferential direction of the wheel-side flange, and the second connecting arms extend in a radial direction of the wheel-side flange; the plurality of first connecting arms and the plurality of second connecting arms are arranged in a staggered mode, and the radial outer ends of the first connecting arms and the radial outer ends of the second connecting arms are located on the radial inner side of the first rubber ring.

Optionally, each metal block is provided with a through hole extending in the radial direction of the rubber ring, the through hole is used for a bolt to penetrate, and each of the first connecting arm and the first second connecting arm is fixed to the bolt in a threaded manner.

Optionally, a radial outer end of the metal block is provided with a notch, and the notch is used for accommodating a bolt head of the bolt.

Optionally, each radial inboard of metal block all is provided with the recess, each the radial outer end of first linking arm and each the radial outer end of second linking arm all is provided with the boss, the boss with the recess one-to-one block.

Optionally, along the axial of hollow shaft, wheel side flange deviates from one side of hollow shaft is provided with first terminal surface tooth structure, first terminal surface tooth structure be used for with the meshing of the second terminal surface tooth structure of wheel, just wheel side flange with the wheel is through following the axial extension's of wheel side flange bolt fixed connection.

Optionally, the gearbox output coupling further comprises a non-wheel-side flange, wherein a first end face tooth is arranged at one axial end of the non-wheel-side flange, a second end face tooth is arranged at the second end of the non-wheel-side flange, and the first end face tooth is meshed with the second end face tooth; the non-wheel-side flange is fixedly connected with the hollow shaft through bolts extending in the axial direction of the hollow shaft.

Optionally, the gearbox output coupling further comprises a gearbox connecting disc and a second rubber ring, and the gearbox connecting disc and the non-wheel-side flange are flexibly connected through the second rubber ring;

and one side of the gear box connecting disc, which faces the first end, is provided with third end face teeth, and the third end face teeth are used for being meshed with fourth end face teeth on the output gear.

Optionally, a plurality of third connecting arms are arranged in the circumferential direction of the non-wheel-side flange, a plurality of fourth connecting arms are arranged in the circumferential direction of the gearbox connecting disc, and the third connecting arms and the fourth connecting arms are arranged in a staggered manner and located on the radial inner side of the second rubber ring; the third connecting arms and the fourth connecting arms are connected with the second rubber ring through bolts extending in the radial direction of the second rubber ring;

each the radial outer end of third linking arm and each the radial outer end of fourth linking arm all is provided with the boss, the radial inboard of each metal block of second rubber ring all is provided with the recess, the boss with the recess one-to-one block.

Embodiments of the present invention also provide a gearbox. The gearbox includes an output gear and the gearbox output coupling described above, the output gear being drivingly connected to a second end of the gearbox output coupling.

Optionally, the gearbox further comprises a box body, the box body comprises a first box body part and a second box body part which are connected with each other, an included angle is formed between the matching surfaces of the first box body part and the second box body part and the horizontal plane, and the matching surfaces pass through the axis of the output gear.

Embodiments of the present invention also provide a low floor rail vehicle. The low-floor rail vehicle comprises wheels and the gear box, wherein the wheels are in transmission connection with the wheel side flanges.

The gearbox output coupling, the gearbox and the low-floor rail vehicle have the advantages that the gearbox output coupling, the gearbox and the low-floor rail vehicle are as follows:

embodiments of the present invention provide a gearbox output coupling comprising a hollow shaft, a first rubber ring and a wheel side flange. The hollow shaft has relative first end and second end, and the second end is used for being connected with output gear drive, and first end is through first rubber ring and wheel side flange flexonics to realize the compensation to displacement and angle difference etc. through first rubber ring. First rubber ring includes metal block and rubber portion, and a plurality of metal blocks are along circumferencial direction interval distribution, and rubber portion vulcanizes the shaping between two adjacent metal blocks, and so first rubber ring formula structure as an organic whole is convenient for install, and is difficult for appearing centering behind the integral type structure installation, not careful problem, and then helps improving bearing capacity, and stable in structure, reliability height. And parts of the metal blocks are fixedly connected with the first end, and the rest parts of the metal blocks are connected with the wheel side flange, so that the flexible connection between the wheel side flange and the hollow shaft is realized, and the deflection function is realized.

Embodiments of the present invention provide a gearbox including a gearbox output coupling as described above. Because the gearbox comprises the gearbox output coupling, the gearbox output coupling has the advantages of convenience in installation, strong bearing capacity, stable structure and high reliability.

Embodiments of the present invention also provide a low floor rail vehicle comprising a gearbox as described above. Because the low-floor railway vehicle comprises the gear box, the low-floor railway vehicle also has the beneficial effects of convenient installation of the output coupling, strong bearing capacity, stable structure and high reliability.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of a gearbox provided in an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view taken along line II-II of FIG. 1;

FIG. 3 is a schematic structural view of a gearbox coupling provided in accordance with an embodiment of the present invention;

FIG. 4 is a schematic diagram of a rubber ring in a gearbox coupling according to an embodiment of the present invention;

FIG. 5 is a schematic representation of a hollow spindle of a gearbox output coupling provided in accordance with an embodiment of the present invention;

FIG. 6 is a schematic structural view of a wheel-side flange of a gearbox output coupling according to an embodiment of the present invention;

FIG. 7 is an enlarged view of a portion of the structure at VII in FIG. 2;

FIG. 8 is an enlarged view of a portion of FIG. 2 at VIII;

FIG. 9 is a schematic structural view of a non-wheel side flange of a gearbox output coupling provided in accordance with an embodiment of the present invention;

FIG. 10 is a schematic structural view of a gearbox interface disk in a gearbox output coupling according to an embodiment of the present invention.

Icon: 10-a gearbox; 100-gearbox output coupling; 110-a hollow shaft; 111-a first end; 112-a second end; 113-a first connecting arm; 114-a first bolt hole; 115-boss; 116-second face teeth; 120-wheel side flange; 121-a second connecting arm; 122-second bolt hole; 123-a first end face tooth structure; 130-rubber ring; 131-a first rubber ring; 132-a second rubber ring; 133-metal block; 134-notch; 135-a groove; 136-a via; 137-rubber part; 140-non-wheel side flange; 141-first end face teeth; 142-a third connecting arm; 150-a gearbox coupling disc; 151-third end face teeth; 152-a fourth connecting arm; 161-first connecting bolt; 162-a second connecting bolt; 163-third connecting bolt; 164-fourth connecting bolt; 165-fifth connecting bolt; 210-a box body; 211-a first tank portion; 212-a second tank portion; 221-an input shaft; 222-a bearing seat; 223-a first cylindrical roller bearing; 224-ball bearings; 225-a second cylindrical roller bearing; 226 — input coupling; 227-intermediate shaft; 228-an output gear; 229-fourth end face teeth; 20-a wheel; 21-second end face tooth configuration.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

Fig. 1 is a schematic structural diagram of a gear box 10 provided in this embodiment, fig. 2 is a schematic sectional structural diagram at ii-ii in fig. 1, and fig. 2 shows a connection structure of a wheel 20 and a wheel-side flange 120, fig. 3 is a schematic structural diagram of a coupling of the gear box 10 provided in this embodiment, and fig. 4 is a schematic structural diagram of a rubber ring 130 in the coupling of the gear box 10 provided in this embodiment. Referring to fig. 1-4 in combination, the present embodiment provides a gearbox output coupling 100 and, accordingly, a gearbox 10 and low floor rail vehicle (not shown).

The low-floor rail vehicle includes a gear box 10, and the low-floor rail vehicle further includes wheels 20, and the wheels 20 are connected to a gear box output coupling 100 of the gear box 10 so that power is transmitted to the wheels 20 through the gear box 10 to drive the wheels 20 to operate.

The gearbox 10 comprises a gearbox output coupling 100, and the gearbox 10 further comprises an output gear 228, wherein the output gear 228 has a gear portion and a shaft section portion, the shaft section portion is of a hollow structure, a hollow shaft 110 of the gearbox 10 coupling is arranged in the shaft section portion in a penetrating mode, a first end 111 of the hollow shaft 110 extends out of the shaft section portion to be connected with the wheel side flange 120, and a second end 112 of the hollow shaft 110 is connected with the shaft section portion.

The gearbox output coupling 100 comprises a hollow shaft 110, a first rubber ring 131 and a wheel side flange 120. The hollow shaft 110 has a first end 111 and a second end 112 opposite to each other, the second end 112 is used for being in transmission connection with the output gear 228, and the first end 111 is flexibly connected with the wheel-side flange 120 through the first rubber ring 131, so that the compensation of displacement, angle difference and the like is realized through the first rubber ring 131. First rubber ring 131 includes metal block 133 and rubber portion 137, and a plurality of metal blocks 133 are along circumferencial direction interval distribution, and rubber portion 137 vulcanizes the shaping between two adjacent metal blocks 133, and the installation of being convenient for is difficult for appearing centering, the not careful problem after just integral type structure installation, and then helps improving bearing capacity like this first rubber ring 131 formula structure as an organic whole. Some of the plurality of metal blocks 133 are fixedly connected to the first end 111, and the remaining of the plurality of metal blocks 133 are connected to the wheel side flange 120, thereby achieving flexible connection of the wheel side flange 120 to the hollow shaft 110.

The structure of the gearbox output coupling 100 provided in the present embodiment is further explained below:

referring to fig. 4, in the present embodiment, the gearbox output coupling 100 includes two rubber rings 130, the two rubber rings 130 are a first rubber ring 131 and a second rubber ring 132, respectively, and the first rubber ring 131 is connected to the first end 111 of the hollow shaft 110 and the wheel-side flange 120 at the same time, so as to achieve flexible connection between the hollow shaft 110 and the wheel-side flange 120. The second rubber ring 132 is used to achieve a flexible connection of the second end 112 of the hollow shaft 110 with the output gear 228.

Specifically, the first rubber ring 131 includes a plurality of metal blocks 133 and a plurality of rubber portions 137, the number of the metal blocks 133 is plural, the plurality of metal blocks 133 are distributed at intervals in the circumferential direction, the rubber portions 137 are formed between two adjacent metal blocks 133 through vulcanization, the rubber portions 137 are connected and fixed with the metal blocks 133 through vulcanization, and the first rubber ring 131 manufactured in this way is of an integrated structure. The rigidity of the first rubber ring 131 of the integrated structure is more uniform, the structural stability is better, and the reliability is high. Optionally, the metal block 133 is made of aluminum alloy. The rubber part 137 has a laminated metal sheet wrapped in rubber to ensure the overall rigidity of the rubber ring 130, making the structure more stable and reliable.

Fig. 5 is a schematic structural view of a hollow shaft 110 of the gearbox output coupling 100 provided in this embodiment, and fig. 6 is a schematic structural view of a wheel-side flange 120 of the gearbox output coupling 100 provided in this embodiment. Referring to fig. 1 to fig. 6, in the present embodiment, the first end 111 of the hollow shaft 110 has a plurality of first connecting arms 113 distributed along the circumferential direction of the hollow shaft 110, and each of the first connecting arms 113 extends outward along the radial direction of the hollow shaft 110. The wheel-side flange 120 has a plurality of second connecting arms 121 distributed along the circumferential direction of the wheel-side flange 120, and each of the second connecting arms 121 extends radially outward of the wheel-side flange 120. The plurality of first connecting arms 113 and the plurality of second connecting arms 121 are arranged in a staggered manner, that is, one second connecting arm 121 is arranged between any two adjacent first connecting arms 113, and one first connecting arm 113 is arranged between any two adjacent second connecting arms 121. The radially outer end of the first connecting arm 113 and the radially outer end of the second connecting arm 121 are both located radially inward of the first rubber ring 131, and the radially outer end of the first connecting arm 113 and the radially outer end of the second connecting arm 121 are located at substantially the same axial position.

Further, each metal block 133 is provided with a through hole 136 extending along the radial direction of the rubber ring 130, the through hole 136 is used for a bolt to penetrate, the connection between the metal block 133 and the first connecting arm 113 or the second connecting arm 121 is realized through the bolt, the bolt is a first connecting bolt 161, namely, a part of the first connecting bolt 161 penetrates through the through hole 136 and then is fixed with the first connecting arm 113 in a threaded manner, and the other part of the first connecting bolt 161 penetrates through the through hole 136 and then is fixed with the second connecting arm 121 in a threaded manner.

Specifically, the first connecting arm 113 is provided with a first bolt hole 114, an axis of the first bolt hole 114 extends along the radial direction of the hollow shaft 110, and the first connecting bolt 161 is screwed with the first bolt hole 114 after passing through the through hole 136 on the metal block 133 corresponding to the first connecting arm 113, so as to connect the first rubber ring 131 with the hollow shaft 110. The second connecting arm 121 is provided with a second bolt hole 122, the axis of the second bolt hole 122 extends along the radial direction of the wheel side flange 120, the first connecting bolt 161 penetrates through the through hole 136 on the metal block 133 corresponding to the second connecting arm 121 and then is in threaded connection with the second bolt hole 122, the connection between the first rubber ring 131 and the wheel side flange 120 is realized by following people, and thus the flexible connection between the hollow shaft 110 and the wheel side flange 120 is realized.

Optionally, the first rubber ring 131 includes twelve metal blocks 133, six first connecting arms 113 are disposed on the hollow shaft 110, the six first connecting arms 113 are uniformly distributed along the circumferential direction of the hollow shaft 110, six second connecting arms 121 are disposed on the wheel-side flange 120, and the six second connecting arms 121 are uniformly distributed along the circumferential direction of the wheel-side flange 120. In the assembled state, the hollow shaft 110 is disposed coaxially with the wheel-side flange 120, the six first connecting arms 113 and the six second connecting arms 121 are distributed alternately in the circumferential direction of the hollow shaft 110 (i.e., the circumferential direction of the wheel-side flange 120), six of the twelve metal blocks 133 are fixedly connected to the six first connecting arms 113 by the first connecting bolts 161, and the other six of the twelve metal blocks 133 are fixedly connected to the six second connecting arms 121 by the first connecting bolts 161.

Referring to fig. 1 to fig. 6, in the present embodiment, a groove 135 is formed on a radial inner side of each metal block 133, a boss 115 is formed on a radial outer end of each first connecting arm 113 and a radial outer end of each second connecting arm 121, and the bosses 115 are correspondingly engaged with the grooves 135 one to one, so that the integrated bearing and assembling and the positioning accuracy are high. Specifically, the boss 115 is a bar-shaped protrusion extending in the axial direction of the hollow shaft 110, the first bolt hole 114 is opened in the middle of the boss 115 on the first connecting arm 113, and the second bolt hole 122 is opened in the middle of the boss 115 on the second connecting arm 121.

Further, a radial outer end of the metal block 133 is provided with a notch 134, and the notch 134 is used for accommodating a bolt head of the bolt. Specifically, a notch 134 is formed at the radially outer end of the metal block 133, a through hole 136 is communicated with the notch 134, and the first connecting bolt 161 extends into the notch 134, passes through the through hole 136, and is screwed with the first bolt hole 114 or the second bolt hole 122. In an assembled state, the bolt head of the first connecting bolt 161 is accommodated in the notch 134, so that the problems of interference, reduction of installation space and the like caused by the bolt head protruding out of the outer periphery of the metal block 133 are avoided.

FIG. 7 is an enlarged view of a portion of the structure at VII in FIG. 2. Referring to fig. 1 to 7, in the present embodiment, along the axial direction of the hollow shaft 110, a first end face tooth structure 123 is disposed on a side of the wheel-side flange 120 away from the hollow shaft 110, and correspondingly, a second end face tooth structure 21 is disposed on the wheel 20, and the first end face tooth structure 123 is engaged with the second end face tooth structure 21, so that the strength and the stability of the end face tooth structure are high, and the torque transmission between the wheel-side flange 120 and the wheel 20 is stable and reliable. While the wheel-side flange 120 is fixedly connected to the wheel 20 by a bolt extending in the axial direction of the wheel-side flange 120, which is a second connecting bolt 162. The second connecting bolt 162 is screwed and fixed to the wheel 20 through the wheel-side flange 120. Specifically, the second connecting bolt 162 is provided at the axis of the wheel-side flange 120, and axial tightening is achieved by the second connecting bolt 162. Optionally, both the first end face tooth structure 123 and the second end face tooth structure 21 are curved teeth, and it is understood that in other embodiments, the first end face tooth structure 123 and the second end face tooth structure 21 may be provided as straight teeth on the end faces.

Fig. 8 is an enlarged schematic view of a part of the structure at viii in fig. 2, and fig. 9 is a schematic view of the structure of a non-wheel-side flange 140 in the output coupling 100 of the gearbox according to the present embodiment. Referring to fig. 1-9 in combination, in the present embodiment, gearbox output coupling 100 further includes a non-wheel side flange 140. One axial end of the non-wheel-side flange 140 is provided with first end face teeth 141, the second end 112 of the hollow shaft 110 is provided with second end face teeth 116, and the first end face teeth 141 and the second end face teeth 116 are meshed, so that transmission of the hollow shaft 110 and the non-wheel-side flange 140 is achieved. While the non-wheel-side flange 140 is fixedly connected to the hollow shaft 110 by a bolt extending in the axial direction of the hollow shaft 110, which is a third connecting bolt 163. It will be appreciated that the intermeshing face teeth may be either arcuate or straight.

Specifically, the number of the third connecting bolts 163 is plural, the plural third connecting bolts 163 are uniformly distributed along the circumferential direction of the hollow shaft 110, and each third connecting bolt 163 penetrates through the non-wheel-side flange 140 to be screwed with the hollow shaft 110, so that the connection reliability of the non-wheel-side flange 140 and the hollow shaft 110 is ensured.

Fig. 10 is a schematic structural view of a gearbox coupling plate 150 in the gearbox output coupling 100 according to the present embodiment. Referring to fig. 1 to 10, further, the gearbox output coupling 100 further includes a gearbox connecting plate 150, the gearbox connecting plate 150 is sleeved on the hollow shaft 110, and the gearbox connecting plate 150 and the non-wheel-side flange 140 are flexibly connected by the second rubber ring 132. The side of the gearbox coupling disc 150 facing the first end 111 is provided with third end face teeth 151, the third end face teeth 151 being adapted to mesh with fourth end face teeth 229 on the output gear 228.

Specifically, the structure of the second rubber ring 132 is substantially the same as that of the first rubber ring 131, that is, the second rubber ring 132 also includes a plurality of metal blocks 133 uniformly distributed, and a rubber portion 137 fixedly connected to the metal blocks 133 is formed between two adjacent metal blocks 133 through vulcanization of natural rubber, so as to form an integral ring structure. Similarly, the rubber part 137 of the second rubber ring 132 also includes a plurality of metal sheets stacked one on another.

The non-wheel-side flange 140 has a plurality of third connecting arms 142 in the circumferential direction, the gearbox connecting plate 150 has a plurality of fourth connecting arms 152 in the circumferential direction, and the third connecting arms 142 and the fourth connecting arms 152 are alternately arranged radially inward of the second rubber ring 132. And the plurality of third connecting arms 142 and the plurality of fourth connecting arms 152 are respectively connected to the second rubber ring 132 by bolts extending in the radial direction of the second rubber ring 132, which are fourth connecting bolts 164.

Specifically, the connecting structures between the third and fourth connecting arms 142 and 152 and the second rubber ring 132 are similar to those between the first and second connecting arms 113 and 121 and the first rubber ring 131. The number of the third connecting arms 142 and the number of the fourth connecting arms 152 are six, the second rubber ring 132 has twelve metal blocks 133 which are uniformly distributed, and the six third connecting arms 142 and the six fourth connecting arms 152 are arranged in one-to-one correspondence with the twelve metal blocks 133. The fourth connecting bolt 164 is screwed with the third connecting arm 142 or the fourth connecting arm 152 after passing through the metal block 133 of the second rubber ring 132.

Meanwhile, correspondingly, the metal block 133 on the second rubber ring 132 also has a notch 134 for accommodating the bolt head and a groove 135 arranged at the radial inner end, the radial outer end of the third connecting arm 142 and the radial outer end of the fourth connecting arm 152 both have a boss 115 fastened with the groove 135, and the groove 135 of the second rubber ring 132 is fastened with the radial outer end of the third connecting arm 142 and the boss 115 at the radial outer end of the fourth connecting arm 152 in a one-to-one correspondence manner, so that accurate positioning of the second rubber ring 132 and the third and fourth connecting arms 142 and 152 is ensured.

Further, the gearbox output coupling 100 further comprises a fifth connecting bolt 165, the fifth connecting bolt 165 extends in the axial direction of the gearbox connecting disc 150, and a plurality of fifth connecting bolts 165 are distributed along the circumferential direction of the gearbox connecting disc 150. The fifth connection bolt 165 is screwed with the output gear 228 through the gearbox connection plate 150, and is axially tightened, thereby ensuring the connection reliability of the gearbox connection plate 150 and the output gear 228.

According to the gearbox output coupling 100 of the present embodiment, when mounting on the non-wheel side, the second end 112 of the hollow shaft 110 is first extended into the shaft section of the output gear 228, and the second end 112 is extended from the other end of the shaft section. Then, the gearbox connecting disc 150 is sleeved on the second end 112, the third end face teeth 151 of the gearbox connecting disc 150 are meshed with the fourth end face teeth 229 of the output gear 228, the gearbox connecting disc 150 and the output gear 228 are axially tensioned through the fifth connecting bolt 165, and the connecting transmission reliability of the gearbox connecting disc 150 and the output gear 228 is guaranteed. The first end face teeth 141 of the non-wheel-side flange 140 are then meshed with the second end face teeth 116 of the second end 112, and the non-wheel-side flange 140 is connected to the second end 112 (i.e., the hollow shaft 110) by the third connecting bolt 163. At this time, each third connecting arm 142 extends between two adjacent fourth connecting arms 152, that is, at this time, the plurality of third connecting arms 142 and the plurality of fourth connecting arms 152 are arranged alternately. Finally, the second rubber ring 132 is pushed in the axial direction of the hollow shaft 110, the bosses 115 on the third connecting arm 142 and the fourth connecting arm 152 slide into the grooves 135 on the second rubber ring 132, and after the third rubber ring 132 and the fourth connecting arm 142 are slid to the mounting position, the second rubber ring 132 and the fourth connecting arm 152 are connected through the fourth connecting bolt 164.

When the wheel is installed, the wheel-side flange 120 is connected and positioned with the wheel 20 through the meshing of the first facing tooth structure 123 and the second facing tooth structure 21 and the screwing of the second connecting bolt 162 with the wheel 20. The flexible connection of the wheel-side flange 120 to the hollow shaft 110 is then achieved by the connection of the first rubber ring 131 to the second connecting arm 121 on the wheel-side flange 120 and to the first connecting arm 113 on the hollow shaft 110.

In the use process, flexible displacement and angle deformation can be realized through the first rubber ring 131 and the second rubber ring 132, so that the gearbox output coupling 100 realizes the displacement function, and the displacement difference between a primary suspension on a bogie and the wheels 20 is compensated.

The present embodiment provides a gearbox output coupling 100 having at least the following advantages:

the gearbox output coupling 100 provided by the embodiment of the invention realizes the flexible connection of the wheel side flange 120 and the hollow shaft 110 and the flexible connection of the non-wheel side flange 140 and the gearbox connecting disc 150 by the integral rubber ring 130 and adopting the radial connection of bolts, and meanwhile, the rubber ring 130 is provided with the groove 135 which is matched and positioned with the lug boss 115, so that the integrated bearing is realized, the installation is simple and convenient, and the bearing capacity is good. Meanwhile, the wheel-side flange 120 and the wheel 20 are positioned in a meshed manner by adopting a face tooth structure, the bolts are only tensioned axially, the face tooth structure has better capacity of bearing and transmitting torque, and the processing and the assembly are convenient. Meanwhile, when the overhaul period is reached, only the rubber ring 130 needs to be replaced without disassembling the gear box 10 and the wheels 20, and the disassembly is simple and the maintenance is convenient.

Referring to fig. 1 and 2 in combination, the present embodiment also provides a gearbox 10, the gearbox 10 including a gearing arrangement and the gearbox output coupling 100 described above. The gear transmission structure is a two-stage transmission structure and comprises a primary gear pair and a secondary gear pair. Specifically, the gear transmission structure comprises an input shaft 221, an intermediate shaft 227 and an output gear 228, two gears of the primary gear pair are respectively arranged on the input shaft 221 and the intermediate shaft 227, two gears of the secondary gear pair are respectively arranged on the intermediate shaft 227 and the output gear 228, namely, a gear part of the output gear 228 and one gear on the intermediate shaft 227 are in meshing transmission to form the secondary gear pair. Optionally, the first gear pair is a helical bevel gear pair, and the second gear pair is a cylindrical helical gear pair.

The output gear 228 is drivingly connected to the second end 112 of the hollow shaft 110, and in operation, power is transmitted from the input shaft 221 into the gearbox 10, and through the primary and secondary gear pairs in turn, to the output gear 228.

The gearbox 10 has a housing 210 with a gear drive arrangement disposed within the housing 210. The housing 210 is a slanted or vertical split configuration, i.e., the housing 210 includes a first housing portion 211 and a second housing portion 212 connected to each other, and the mating surfaces of the first and second housing portions 211 and 212 are disposed at an angle relative to the horizontal and pass through the axis of the output gear 228 to facilitate installation of the gearbox output coupling 100. In the present embodiment, the box 210 has a slant box-separating structure. The mating surface is disposed at an angle to the horizontal, optionally at an angle of 35 °. It will be appreciated that in other embodiments, when the housing 210 is arranged in a vertical split-housing configuration, the mating surfaces are arranged vertically to the horizontal, i.e., the mating surfaces are at a 90 angle to the horizontal.

By arranging the box body 210 in an inclined box-separating structure or a vertical box-separating structure, the gearbox 10 is compact in structure, helps to save space, reduces unsprung weight of the bogie, and simultaneously, the matching surfaces of the first box body portion 211 and the second box body portion 212 (i.e., the parting surface of the box body 210) do not pass through the mounting hole of the input shaft 221, the bearing seat 222 at the input shaft 221 is completely mounted inside the box body 210, and the overall structure is more rigid.

Further, the input shaft 221 is supported by the bearing housing 222 through a first cylindrical roller bearing 223, a ball bearing 224, and a second cylindrical roller bearing 225. In a direction in which the axis of the input shaft 221 is close to the intermediate shaft 227, a first cylindrical roller bearing 223, a ball bearing 224, and a second cylindrical roller bearing 225 are provided in this order. Spacers are arranged between the first cylindrical roller bearing 223 and the ball bearing 224 and between the ball bearing 224 and the second cylindrical roller bearing 225. Through the setting to input shaft 221 department bearing, its bearing play belongs to the inherent attribute of bearing itself, during the assembly, direct axial compress tightly can, need not adjust the play deliberately to, along with the vehicle operation, bearing play value is stable, can not bring too big additional load, is favorable to the normal use of input coupling 226. Optionally, the input coupling 226 is a diaphragm disc coupling.

The present embodiment also provides a low floor rail vehicle including the gearbox 10 described above. The low floor rail vehicle further includes a wheel 20, the wheel 20 being connected to a wheel side flange 120 of the gearbox output coupling 100. Specifically, the wheel 20 is provided with a second end face tooth structure 21, and the second end face tooth structure 21 is engaged with the first end face tooth structure 123 of the wheel-side flange 120.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.