阅读说明：本技术 轴悬式安装直驱电机用联轴器及其刚度设计方法 (Shaft coupling for shaft suspension type installation direct drive motor and rigidity design method thereof ) 是由 肖光辉 贺才春 涂奉臣 李�昊 于 2019-11-22 设计创作，主要内容包括：轴悬式安装直驱电机用联轴器,包括与轮轴同轴固定的轮轴侧连接盘和与电机转子轴同轴固定的电机侧连接盘,其特征在于还包括弹性支撑转动组件,弹性支撑转动组件连接在轮轴侧连接盘和电机侧连接盘径向之间,使轮轴侧连接盘和电机侧连接盘同轴可转动连接,并通过弹性支撑转动组件沿径向承载电机重量,轮轴侧连接盘和电机侧连接盘周向弹性连接。本发明在满足径向大承载的同时可获得更好的减振缓冲效果,降低了失效风险,延长金属橡胶件的使用寿命,提高联轴器的使用可靠性,容易实现轮轴侧连接盘和电机侧连接盘的对中连接,提高联轴器的安装可靠性和便利性,安装过程方便简单,便于检修更换。本发明还提供轴悬式安装直驱电机用联轴器的刚度设计方法。(The shaft suspension type installation direct-drive motor coupler comprises a wheel shaft side connecting disc and a motor side connecting disc, wherein the wheel shaft side connecting disc is coaxially fixed with a wheel shaft, the motor side connecting disc is coaxially fixed with a motor rotor shaft, and the shaft suspension type installation direct-drive motor coupler is characterized by further comprising an elastic support rotating assembly, the elastic support rotating assembly is connected between the wheel shaft side connecting disc and the motor side connecting disc in the radial direction, the wheel shaft side connecting disc and the motor side connecting disc are coaxially and rotatably connected, the motor weight is borne by the elastic support rotating assembly in the radial direction, and the wheel shaft side connecting. The invention can obtain better vibration damping and buffering effects while meeting the requirement of large radial bearing, reduces failure risk, prolongs the service life of the metal rubber part, improves the use reliability of the coupler, easily realizes the centering connection of the wheel shaft side connecting disc and the motor side connecting disc, improves the installation reliability and convenience of the coupler, and has convenient and simple installation process and convenient maintenance and replacement. The invention further provides a rigidity design method of the shaft coupling for the shaft suspension type installation direct drive motor.)

1. Shaft suspension installation directly drives shaft coupling for motor, include with the coaxial fixed shaft side connection pad (1) of shaft and with motor rotor axle coaxial fixed motor side connection pad (2), its characterized in that still includes elastic support rotating assembly (3), elastic support rotating assembly (3) connect between shaft side connection pad (1) and motor side connection pad (2) are radial, make shaft side connection pad (1) and the coaxial rotatable coupling of motor side connection pad (2) to radially bear motor weight through elastic support rotating assembly (3), shaft side connection pad (1) and motor side connection pad (2) circumference elastic connection.

2. The shaft coupling for the shaft-suspended direct-drive motor is characterized in that the wheel shaft side connecting disc (1) comprises a wheel shaft sleeve (11) which is sleeved on a wheel shaft in an interference fit mode, a first connecting block (12) and a radial connecting ring (13), wherein the first connecting block (12) is circumferentially and elastically connected with the motor side connecting disc (2), and the first connecting block (12) is uniformly distributed along the periphery of the wheel shaft sleeve (11) and is connected with the wheel shaft sleeve (11) through the radial connecting ring (13).

3. The shaft coupling for the shaft-suspended direct-drive motor is characterized in that the motor-side connecting disc (2) comprises a connecting cylinder (21) coaxially fixedly connected with a motor rotor shaft and a second connecting block (22) circumferentially and elastically connected with the wheel shaft-side connecting disc (1), the second connecting block (22) is fixed on the periphery of the connecting cylinder (21) and corresponds to the first connecting blocks (12) one by one, the second connecting blocks are uniformly distributed on the periphery of the connecting cylinder (2), and the second connecting blocks (22) are circumferentially spaced from and elastically connected with the corresponding first connecting blocks (12).

4. The shaft coupling for the shaft-suspended direct-drive motor is characterized in that the second connecting block (22) is elastically connected with the corresponding first connecting block (12) through the metal rubber part (4), and the metal rubber part (4) is compressed between the second connecting block (22) and the corresponding first connecting block (12) along the circumferential direction.

5. The shaft coupling for the shaft-suspended direct-drive motor is characterized in that the metal rubber part (4) comprises a rubber block (41) in an arc shape and metal connecting parts (42) vulcanized and bonded at two ends of the arc of the rubber block (41), the first connecting block (12) and the second connecting block (22) are axially positioned with the metal connecting parts (42) respectively and fixedly connected through bolts, and the rubber block (41) is arranged along the circumferential direction and compressed between the two metal connecting parts (42).

6. The shaft coupling for the shaft-suspended direct-drive motor is characterized in that the metal connecting piece (42) is in right-angle joint contact with the first connecting block (12) and the second connecting block (22), the metal connecting piece (42) is provided with a radial protrusion (42.1), the first connecting block (12) and the second connecting block (22) are respectively provided with a radial groove (23) matched with the radial protrusion (42.1), the radial grooves (23) are in concave-convex matching with the radial protrusion (42.1) to axially position the metal connecting piece (42) with the first connecting block (12) and the second connecting block (22) respectively, and the rubber block (41) is vulcanized with a partition plate (43) which is radially arranged.

7. The shaft coupling for the shaft-hung direct-drive motor is characterized in that a radial supporting and positioning cylinder (24) is sleeved on the connecting cylinder (21), the second connecting block (22) is arranged on the outer peripheral surface of the radial supporting cylinder (24) and is integrated with the radial supporting cylinder (24) into a whole, the axial height of the radial supporting and positioning cylinder (24) is larger than that of the connecting cylinder (21), and the elastic bearing assembly (3) is coaxially arranged in an inner cavity of the radial supporting and positioning cylinder (24) and is sleeved on the wheel shaft sleeve (11).

8. The shaft coupling for the shaft suspension type installation direct drive motor according to claim 7 is characterized in that the elastic support assembly (3) comprises an elastic support cylinder (31) which is arranged in an inner cavity of the radial support positioning cylinder (24) in a circumferential positioning fit mode, a bearing seat (32) which is arranged in an inner cavity of the elastic support cylinder (31) in a circumferential positioning fit mode, and a bearing (33) which is pressed in the bearing seat (32), wherein an inner ring of the bearing (33) is sleeved on the wheel shaft sleeve (11).

9. The shaft coupling for the shaft-suspended direct-drive motor, as recited in claim 8, wherein the outer wall of the elastic support cylinder (31) is provided with a first axial positioning protrusion (31.1), the inner wall of the radial support positioning cylinder (24) is provided with a first axial groove (24.1) which is in concave-convex fit with the first positioning protrusion (31.1), the inner wall of the elastic support cylinder (31) is provided with a second axial positioning protrusion (31.2), the bearing seat (32) is provided with a second axial groove (32.1) which is in concave-convex fit with the second positioning protrusion (31.2), the first positioning protrusion (31.1) is in concave-convex fit with the second axial groove (24.1) to circumferentially position and fit the elastic support cylinder (31) and the radial support positioning cylinder (24), the second positioning protrusion (31.2) is in concave-convex fit with the second axial groove (32.1) to circumferentially position and fit the elastic support cylinder (31) and the bearing seat (32), the first positioning protrusion (31.1) and the second positioning protrusion (31.2) are circumferentially and uniformly distributed along the elastic support cylinder (31), the elastic supporting cylinder (31) is made of spring steel.

10. The rigidity design method of the shaft suspension type mounting direct drive motor coupling as claimed in any one of claims 1 to 9, characterized in that the initial rigidity of the circumferential elastic connection between the wheel axle side connecting disc (1) and the motor side connecting disc (2) is designed according to the vibration damping and buffering requirements of the shaft suspension type mounting direct drive motor coupling in the torsion direction when in use, and the rigidity of the elastic support rotating assembly (3) is designed according to the radial bearing and vibration damping requirements of the shaft suspension type mounting direct drive motor coupling when in use.

Technical Field

The invention relates to a shaft coupling for an axially suspended installation direct drive motor and a rigidity design method thereof, and belongs to the technical field of shaft couplings.

Background

The power bogie of the rail transit vehicle mainly provides power through a traction motor to realize rolling motion of wheels. In order to meet the requirements of miniaturization and high transmission efficiency of a power bogie of a next generation railway vehicle, a traction motor direct-drive transmission system becomes a hot spot of pre-research of various large companies and research institutions. The system removes transmission devices such as a gear box and the like, the traction motor is directly connected with the wheel shaft for driving, and the system has the advantages of high transmission efficiency, small maintenance amount, low noise and the like, but simultaneously the motor also needs to bear larger-scale vibration impact generated from the wheel rail after being integrated with the wheel shaft. In order to reduce the influence of vibration impact on the traction motor, at present, most of the traction motors in China are installed by adopting elastic suspension, and the installation mode can be divided into an axle suspension mode in which the motor is directly installed on an axle through an elastic suspension device and a frame suspension mode in which the motor is installed on a bogie frame and then is connected with the axle through the elastic suspension device. The axle suspension type traction motor has the characteristics of simple and compact structure, good economy and the like, but most of the weight of the traction motor falls on the wheel axle through the elastic suspension device in the mode, so that the structural reliability and the performance stability of the elastic suspension device are greatly tested. Patent CN106364496A discloses an elastic suspension device for axle-hung mounting motor, include motor end go-between be connected with axle-hung motor rotor output, axle end go-between and the elastic element of being connected with the axletree, the peripheral perisporium interval of motor end go-between and axle end go-between is provided with the boss of crisscross distribution, and the elastic element parcel is fixed in the periphery of boss to have the wedge that inserts adjacent boss clearance. Patent CN110027575A discloses a connector comprising an elastomer unit having two pieces to be connected, wherein the pieces to be connected each have a connecting piece oriented towards the axis of the piece to be connected, arranged in an annularly encircling manner. The two connecting pieces to be connected are oppositely arranged along the axial direction at mutually staggered angles, and the periphery of the connecting block is sleeved with an elastic ring.

Radial bearing is sheared the atress by wedge block rubber in the above-mentioned patent, and its radial bearing capacity is not enough, and the block rubber is fragile, and life is short. The rubber block can creep under the action of a large load for a long time, so that the failure risk of a motor system is increased; in addition, above patent motor side connection structure and shaft side connection structure all can't the centering location to because the block rubber needs the pre-compaction installation, each block rubber that leads to in the elastic ring is difficult to install simultaneously and targets in place, need just can install with the help of complicated special frock clamp, have installation and overhaul extremely inconvenient problem.

Disclosure of Invention

The shaft suspension type coupling for mounting the direct-drive motor and the rigidity design method thereof provided by the invention have the advantages that the radial large bearing is met, the better vibration damping and buffering effects can be obtained, the failure risk is reduced, the service life of a metal rubber part is prolonged, the use reliability of the coupling is improved, the centering connection of the wheel shaft side connecting disc and the motor side connecting disc is easily realized, the mounting reliability and convenience of the coupling are improved, the mounting process is convenient and simple, and the maintenance and the replacement are convenient.

In order to achieve the purpose, the invention adopts the technical scheme that:

the shaft suspension type installation direct-drive motor coupler comprises a wheel shaft side connecting disc and a motor side connecting disc, wherein the wheel shaft side connecting disc is coaxially fixed with a wheel shaft, the motor side connecting disc is coaxially fixed with a motor rotor shaft, and the shaft suspension type installation direct-drive motor coupler is characterized by further comprising an elastic support rotating assembly, the elastic support rotating assembly is connected between the wheel shaft side connecting disc and the motor side connecting disc in the radial direction, the wheel shaft side connecting disc and the motor side connecting disc are coaxially and rotatably connected, the motor weight is radially borne through the elastic support rotating assembly, and the wheel shaft side connecting disc and the motor side.

Preferably, the wheel shaft side connecting disc comprises a wheel shaft sleeve, a first connecting block and a radial connecting ring, wherein the wheel shaft sleeve is sleeved on the wheel shaft in an interference fit mode, the first connecting block is used for being elastically connected with the motor side connecting disc in the circumferential direction, and the first connecting block is uniformly distributed along the outer circumference of the wheel shaft sleeve and is connected with the wheel shaft sleeve through the radial connecting ring.

Preferably, the motor side connecting disc comprises a connecting cylinder and a second connecting block, the connecting cylinder is coaxially and fixedly connected with the motor rotor shaft, the second connecting block is used for being elastically connected with the wheel shaft side connecting disc in the circumferential direction, the second connecting block is fixed to the periphery of the connecting cylinder and is in one-to-one correspondence with the first connecting block, the second connecting block is uniformly distributed on the periphery of the connecting cylinder, and the second connecting block and the first corresponding connecting block are circumferentially separated and elastically connected.

Preferably, the second connecting block and the corresponding first connecting block are elastically connected through a metal rubber piece, and the metal rubber piece is compressed between the second connecting block and the corresponding first connecting block along the circumferential direction.

Preferably, the metal rubber part comprises a rubber block in an arc shape and metal connecting parts vulcanized and bonded at two ends of the arc of the rubber block, the first connecting block and the second connecting block are axially positioned and fixedly connected with the metal connecting parts through bolts respectively, and the rubber block is circumferentially arranged and compressed between the two metal connecting parts.

Preferably, metal connecting piece and connecting block one and connecting block two be the right angle laminating contact, the last radial arch that has of metal connecting piece, all have on connecting block one and the connecting block two with radial protruding complex radial recess, radial recess and the unsmooth cooperation of radial arch are with metal connecting piece respectively with connecting block one and two axial location of connecting block, the block rubber in vulcanize the baffle that has radial setting.

Preferably, the connecting cylinder is sleeved with a radial supporting positioning cylinder, the second connecting block is arranged on the outer peripheral surface of the radial supporting cylinder and is integrated with the radial supporting cylinder into a whole, the axial height of the radial supporting positioning cylinder is greater than that of the connecting cylinder, and the elastic supporting assembly is coaxially arranged in an inner cavity of the radial supporting positioning cylinder and is sleeved on the wheel axle sleeve.

Preferably, the elastic support assembly comprises an elastic support cylinder which is arranged in an inner cavity of the radial support positioning cylinder in a circumferential positioning fit manner, a bearing seat which is arranged in an inner cavity of the elastic support cylinder in a circumferential positioning fit manner, and a bearing which is pressed in the bearing seat, wherein an inner ring of the bearing is sleeved on the axle sleeve.

Preferably, the outer wall of the elastic support cylinder is provided with a first axial positioning bulge, the inner wall of the radial support positioning cylinder is provided with a first axial groove matched with the first axial positioning bulge in a concave-convex mode, the inner wall of the elastic support cylinder is provided with a second axial positioning bulge in an axial direction, the bearing seat is provided with a second axial groove matched with the second axial positioning bulge in a concave-convex mode, the first axial positioning bulge is matched with the concave-convex mode of the axial groove in a circumferential positioning mode of the elastic support cylinder and the radial support positioning cylinder, the second axial positioning bulge is matched with the second axial groove in a concave-convex mode in a circumferential positioning mode of the elastic support cylinder and the bearing seat, the first axial positioning bulge and the second axial positioning bulge are evenly distributed in an alternating mode in the.

The rigidity design method of the shaft suspension type installation direct-drive motor coupler is characterized in that the initial rigidity of the circumferential elastic connection between the wheel shaft side connecting disc and the motor side connecting disc is designed according to the vibration damping and buffering requirements of the shaft suspension type installation direct-drive motor coupler in the torsion direction during use, and the rigidity of the elastic support rotating assembly is designed according to the radial bearing and vibration damping requirements of the shaft suspension type installation direct-drive motor coupler during use.

The invention has the beneficial effects that:

according to the invention, the wheel shaft side connecting disc and the motor side connecting disc are radially connected through the elastic support rotating assembly and are circumferentially and elastically connected, and the elastic support rotating assembly radially bears the weight of the motor, so that the radial bearing capacity is improved, and the twisting direction is not influenced. The problem of current shaft coupling radial bearing capacity be on the par little, can't be applicable to the direct drive motor of axle suspension installation is solved, improve the radial bearing capacity of shaft coupling through the elastic support rotating assembly, utilize the elastic support rotating assembly to guarantee radial damping effect simultaneously, can obtain better damping buffering effect when satisfying radial big bearing.

The wheel axle side connecting disc and the motor side connecting disc are circumferentially and elastically connected, and are circumferentially and elastically connected to perform vibration damping and buffering in the twisting direction, so that the problem that the existing coupler is difficult to simultaneously take two directions into consideration for bearing and damping and buffering by using a rubber elastic body is solved, the circumferential elastic connection is realized by connecting a metal rubber piece with a connecting piece I and a connecting piece II, an elastic support rotating assembly is used for bearing the weight of the motor and reducing radial vibration, the metal rubber piece is used for damping the twisting direction, so that the bearing and the vibration damping and buffering in the two directions of the coupler are separately arranged and do not interfere with each other, the rubber block is not stressed when the motor does not work, the creep deformation and aging degree of the rubber block are reduced, and the rubber block is only subjected to extrusion force and not subjected to shearing force when the motor works, so that the creep deformation of the rubber body is reduced, the use reliability of the coupler is improved.

The elastic support rotating assembly is connected between the wheel shaft side connecting disc and the motor side connecting disc in the radial direction, the wheel shaft side connecting disc and the motor side connecting disc can be positioned in the radial direction, centering connection of the wheel shaft side connecting disc and the motor side connecting disc is achieved easily, and mounting reliability and convenience of the coupler are improved.

Adopt a plurality of metal rubber spare in the shaft coupling, every metal rubber spare is respectively through radial recess and radial bellied unsmooth cooperation, realize the installation location, each metal rubber spare is independently installed not mutually connected, because wheel axle side connection pad and motor side connection pad can rotate relatively, the metal rubber spare that only needs last installation in a plurality of metal rubber spare's installation need carry out the pre-compaction and handle, it is steady through circumference elasticity after the installation, can realize the precompression of each metal rubber spare, the installation is convenient simple, and each metal rubber spare dismouting alone, convenient to overhaul and change.

Drawings

Fig. 1 is a schematic structural diagram of a shaft coupling for a shaft suspension type installation direct drive motor in a specific embodiment.

Fig. 2 is a schematic structural view of the hub-side connection disc.

Fig. 3 is a schematic structural view of the motor-side land.

Fig. 4 is a schematic structural view of the metal rubber member.

Fig. 5 is a half sectional view of the shaft suspension type mounting direct drive motor coupling.

Fig. 6 is a schematic structural view of the elastic support cylinder.

Fig. 7 is a schematic structural view of the bearing seat.

Detailed Description

The following describes an embodiment of the present invention in detail with reference to fig. 1 to 7.

Shaft suspension installation directly drives shaft coupling for motor, include with the coaxial fixed shaft side connection pad 1 of shaft and with the coaxial fixed motor side connection pad 2 of motor rotor axle, its characterized in that still includes elastic support rotating assembly 3, elastic support rotating assembly 3 connect between shaft side connection pad 1 and motor side connection pad 2 are radial, make shaft side connection pad 1 and the coaxial rotatable coupling of motor side connection pad 2 to radially bear motor weight through elastic support rotating assembly 3, shaft side connection pad 1 and the elastic connection of motor side connection pad 2 circumference.

According to the invention, the wheel shaft side connecting disc 1 and the motor side connecting disc 2 are radially connected through the elastic support rotating assembly 3 and are circumferentially and elastically connected, and the elastic support rotating assembly 3 radially bears the weight of the motor, so that the radial bearing capacity is improved, and the twisting direction is not influenced. The problem of current shaft coupling radial bearing capacity be on the small side, can't be applicable to the direct drive motor of axle suspension installation is solved, improve the radial bearing capacity of shaft coupling through elastic support rotating assembly 3, utilize elastic support rotating assembly 3 to guarantee radial damping effect simultaneously, can obtain better damping buffering effect when satisfying radial big bearing.

Wheel shaft side connection pad 1 and 2 circumference elastic connection of motor side connection pad, utilize the elastic connection of both circumference to twist reverse the direction damping buffering, the problem of current shaft coupling utilization rubber elastomer is difficult to compromise two directions simultaneously and bear and the damping buffering is solved, bear motor weight and slow down radial vibration with elastic support rotating assembly, the elastic connection with circumference is to twisting reverse the direction and be damped, make the radial bearing and damping buffering separately setting with two directions of circumference of shaft coupling, mutual noninterference, the system failure risk has been reduced, the life of extension metal rubber spare, the service reliability of shaft coupling is improved. The elastic support rotating assembly 3 is connected between the wheel shaft side connecting disc 1 and the motor side connecting disc 2 in the radial direction, the wheel shaft side connecting disc 1 and the motor side connecting disc 2 can be positioned in the radial direction, centering connection of the wheel shaft side connecting disc and the motor side connecting disc is achieved easily, and installation reliability and convenience of the coupler are improved.

The wheel shaft side connecting disc 1 comprises a wheel shaft sleeve 11, a first connecting block 12 and a radial connecting ring 13, wherein the wheel shaft sleeve 11 is sleeved on the wheel shaft in an interference fit mode, the first connecting block 12 is used for being elastically connected with the motor side connecting disc 2 in the circumferential direction, and the first connecting block 12 is uniformly distributed along the periphery of the wheel shaft sleeve 11 and is connected with the wheel shaft sleeve 11 through the radial connecting ring 13. The wheel shaft sleeve 11 is used for being connected with a wheel shaft and radially connected with the motor side connecting disc 2, so that the wheel shaft side connecting disc 1 and the motor side connecting disc 2 are coaxially connected. The first connecting block 12 is elastically connected with the motor side connecting disc 2 in the circumferential direction, the structure is simple, the radial and circumferential connection of the wheel shaft side connecting disc 1 is easy to realize,

the motor side connecting disc 2 comprises a connecting cylinder 21 and a second connecting block 22, wherein the connecting cylinder 21 is coaxially and fixedly connected with a motor rotor shaft, the second connecting block 22 is used for being elastically connected with the wheel shaft side connecting disc 1 in the circumferential direction, the second connecting block 22 is fixed to the periphery of the connecting cylinder 21 and corresponds to the first connecting block 12 in a one-to-one mode, the periphery of the connecting cylinder 2 is uniformly distributed, and the second connecting block 22 and the first connecting block 12 are circumferentially separated and elastically connected. The connecting cylinder 21 is coaxially connected with the motor rotor shaft, and the second connecting block 22 is circumferentially and elastically connected with the first connecting block 12, so that the circumferential elastic connection between the wheel shaft side connecting disc 1 and the motor side connecting disc 2 is realized.

The second connecting block 22 is elastically connected with the corresponding first connecting block 12 through the metal rubber part 4, and the metal rubber part 4 is compressed between the second connecting block 22 and the corresponding first connecting block 12 along the circumferential direction. The metal rubber part 4 is compressed between the second connecting block 22 and the first connecting block 12, circumferential elasticity is provided for the torsion of the coupler, the metal rubber part 4 is not stressed when the motor does not work, the creep deformation and the aging degree of rubber are reduced, the motor works, the metal rubber part 4 only bears extrusion force and is not subjected to shearing force, so that the creep deformation amount of the rubber is reduced, the risk of system failure is reduced, the service life of the metal rubber part is prolonged, and the use reliability of the coupler is improved.

The metal rubber part 4 comprises a rubber block 41 in an arc shape and metal connecting parts 42 vulcanized and bonded at two ends of the arc of the rubber block 41, the first connecting block 12 and the second connecting block 22 are axially positioned and fixedly connected with the metal connecting parts 42 through bolts respectively, and the rubber block 41 is circumferentially arranged and compressed between the two metal connecting parts 42. The metal connecting pieces 42 are respectively connected with the first connecting piece 12 and the second connecting piece 22, the reliability of the connecting structure of the metal rubber piece 4, the wheel shaft side connecting disc 1 and the motor side connecting disc 2 is guaranteed, the rubber block 41 is vulcanized between the two metal connecting pieces 42, the circumferential elasticity is provided, the initial rigidity of the rubber block 42 is changed, and the circumferential rigidity of the coupler can be changed, so that the coupler meets different vibration damping buffering requirements. The rubber block 41 is not stressed when the motor does not work, the creep deformation and the aging degree of the rubber block 41 are reduced, and the rubber block 41 is only stressed and is not subjected to shearing force when the motor works, so that the creep deformation of the rubber body 41 is reduced, the risk of system failure is reduced, the service life of a metal rubber part is prolonged, and the use reliability of the coupler is improved.

The metal connecting piece 42 is in right-angle joint contact with the first connecting block 12 and the second connecting block 22, the metal connecting piece 42 is provided with a radial protrusion 42.1, the first connecting block 12 and the second connecting block 22 are respectively provided with a radial groove 23 matched with the radial protrusion 42.1, the radial grooves 23 are in concave-convex matching with the radial protrusion 42.1 to axially position the metal connecting piece 42 with the first connecting block 12 and the second connecting block 22 respectively, and the rubber block 41 is vulcanized with a partition plate 43 which is radially arranged. As shown in the figure, the first connecting block 12 and the second connecting block 22 are both provided with radial grooves 23, the metal connecting piece 42 is provided with radial protrusions 42.1, when the metal rubber piece 4 is installed, the radial protrusions 42.1 are aligned with the radial grooves 23, the metal rubber piece 4 is pressed between the first connecting block 12 and the second connecting block 22 along the radial direction, namely, the metal rubber piece 4 is axially positioned with the first connecting block 12 and the second connecting block 22 and is fastened by bolts, the radial protrusions 42.1 are matched with the radial grooves 23, and the metal connecting piece 42 is in right-angle joint contact with the first connecting block 12 and the second connecting block 22, so that the metal rubber piece 4 can be quickly installed in place, the installation structure is firm and reliable, and the structural stability and reliability of the coupler are improved. The provision of the spacer 43 serves to increase the rigidity of the rubber block 41.

The connecting cylinder 21 is sleeved with a radial supporting and positioning cylinder 24, the second connecting block 22 is arranged on the peripheral surface of the radial supporting cylinder 24 and integrated with the radial supporting cylinder 24 into a whole, the axial height of the radial supporting and positioning cylinder 24 is greater than that of the connecting cylinder 21, and the elastic supporting assembly 3 is coaxially arranged in an inner cavity of the radial supporting and positioning cylinder 24 and sleeved on the axle sleeve 11. The radial supporting and positioning cylinder 42 is used for positioning the elastic supporting and rotating assembly 3, the elastic supporting and rotating assembly 3 is positioned between the axle sleeve 11 and the radial supporting and positioning cylinder 42, the axial height of the radial supporting and positioning cylinder 24 is greater than that of the connecting cylinder 21, so that the inner cavity of the radial supporting and positioning cylinder 24 has a space for installing and supporting the rotating assembly 3, the installation of the supporting and rotating assembly 3 is convenient and simple, and the assembling efficiency of the coupler can be effectively improved.

The elastic support component 3 comprises an elastic support cylinder 31 which is arranged in the inner cavity of the radial support positioning cylinder 24 in a circumferential positioning fit mode, a bearing seat 32 which is arranged in the inner cavity of the elastic support cylinder 31 in a circumferential positioning fit mode, and a bearing 33 which is arranged in the bearing seat 32 in a press fit mode, wherein an inner ring of the bearing 33 is sleeved on the axle sleeve 11. Elastic support section of thick bamboo 31, bearing frame 32 and bearing 33 suit from outer to inner in proper order, elastic support section of thick bamboo 31 circumference location is in the inner chamber of radial support location section of thick bamboo 24, it can rotate along with the rotation of motor side connection pad 2 to guarantee elastic support subassembly 3, setting up of bearing 33 makes motor side connection pad 2 and wheel axle side connection pad 1 can rotate relatively, because wheel axle side connection pad 1 and motor side connection pad 2 can rotate relatively, make things convenient for the installation of metal rubber spare 4, the metal rubber spare that only needs last installation in the installation of a plurality of metal rubber spare 4 need carry out the pre-compaction processing, it is steady to pass through circumference elasticity after the installation, can realize the pre-compaction of each metal rubber spare, the installation is convenient and simple, and each metal rubber spare can be dismouting alone, convenient to overhaul and change.

The outer wall of the elastic support cylinder 31 is provided with a first axial positioning protrusion 31.1, the inner wall of the radial support positioning cylinder 24 is provided with a first axial groove 24.1 which is in concave-convex fit with the first positioning protrusion 31.1, the inner wall of the elastic support cylinder 31 is provided with a second axial positioning protrusion 31.2, the bearing seat 32 is provided with a second axial groove 32.1 which is in concave-convex fit with the second positioning protrusion 31.2, the first positioning protrusion 31.1 is in concave-convex fit with the axial groove 24.1 to circumferentially position and fit the elastic support cylinder 31 with the radial support positioning cylinder 24, the second positioning protrusion 31.2 is in concave-convex fit with the second axial groove 32.1 to circumferentially position and fit the elastic support cylinder 31 with the bearing seat 32, the first positioning protrusion 31.1 and the second positioning protrusion 31.2 are circumferentially and uniformly and alternately distributed along the elastic support cylinder 31, and the elastic support cylinder 31 is made of spring steel. As shown in fig. 6, the outer wall of the elastic supporting tube 31 has a first positioning protrusion 31.1, the inner wall has a second positioning protrusion 31.2, the first positioning protrusion 31.1 and the second positioning protrusion 31.2 are uniformly and alternately distributed, that is, a second positioning protrusion 31.2 is arranged between the first positioning protrusions 31.1, a first positioning protrusion 31.1 is also arranged between the second positioning protrusions 31.2, the distance between the adjacent first positioning protrusions and the second positioning protrusions is equal, a section of elastic supporting beam is formed between the adjacent first positioning protrusions and the second positioning protrusions, each first positioning protrusion or second positioning protrusion is arranged between two sections of elastic supporting beams to effectively support the weight of the motor, so as to ensure that the coupler has a larger radial bearing capacity in the radial direction, and meanwhile, the elastic supporting tube 31 is made of spring steel and has a certain elastic buffering capacity, so as to effectively reduce the radial vibration of the wheel axle side connecting disc 1 and the motor side connecting disc 2, the radial large bearing is met, and meanwhile, a better vibration reduction buffering effect can be obtained.

According to the rigidity design method of the shaft suspension type installation direct-drive motor coupler, the initial rigidity of the circumferential elastic connection between the wheel shaft side connecting disc 1 and the motor side connecting disc 2 is designed according to the vibration damping buffering requirement of the shaft suspension type installation direct-drive motor coupler in the torsion direction during use, and the rigidity of the elastic support rotating assembly 3 is designed according to the radial bearing and vibration damping requirement of the shaft suspension type installation direct-drive motor coupler during use.

Designing the initial rigidity of the circumferential elastic connection between the wheel axle side connecting disc 1 and the motor side connecting disc 2, namely designing the number and the initial rigidity value of the metal rubber parts 4, designing the initial rigidity value of the metal rubber parts 4, namely designing the circumferential thickness, the material and the pre-compression amount of the rubber block 41, and additionally arranging a partition plate 43 in the rubber block 41 according to the rigidity requirement;

the design of the rigidity of the elastic supporting rotating assembly 3 refers to the design of the structure, the axial height, the radial thickness and the material of the elastic supporting cylinder 31 in the supporting rotating assembly, and the design of the structure of the elastic supporting cylinder 31 refers to the number of the first positioning protrusions 31.1 and the second positioning protrusions 31.2. According to the rigidity design method, the initial rigidity of the circumferential elastic connection between the wheel shaft side connecting disc 1 and the motor side connecting disc 2 is designed according to the vibration reduction buffering requirement of the coupler in the torsion direction, the rigidity of the elastic support rotating assembly 3 is designed according to the radial bearing and vibration reduction requirements of the coupler, the bearing and vibration reduction requirements of the coupler in different radial and steering directions are met, the vibration reduction buffering effect of the coupler can be effectively improved, the radial bearing capacity of the coupler is improved, the reliability of the coupler is improved, and the service life of the coupler is prolonged.

The technical solutions of the embodiments of the present invention are fully described above with reference to the accompanying drawings, and it should be noted that the described embodiments are only some embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.