CN211449442U

CN211449442U - Coupling and road roller

Info

Publication number: CN211449442U
Application number: CN201922269420.0U
Authority: CN
Inventors: 刘伟峰; 段乾坤; 杜斌
Original assignee: Sany Automobile Manufacturing Co Ltd
Current assignee: Sany Automobile Manufacturing Co Ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-09-08
Anticipated expiration: 2029-12-17

Abstract

The utility model provides a shaft coupling and road roller. Wherein, the shaft coupling includes: the first connecting disc is used for connecting the output end of the driving device and can rotate along with the output end; the second connecting disc is arranged at one end of the first connecting disc, and a first shaft hole is formed in the second connecting disc; the coupling device is arranged between the first connecting disc and the second connecting disc, the first end of the coupling device is fixedly connected with the first connecting disc, the second end of the coupling device is rotatably connected with the second connecting disc, the second end can be connected with an input shaft of the driven device through the first shaft hole, at least part of the second end can move axially, the second end is connected with or disconnected from the first end through the axial movement, and when the second end is connected with the first end, the second end can rotate along with the first end. Through the technical scheme of the utility model, can realize being connected or breaking off between drive arrangement and the slave unit according to the demand, can reduce the influence of weather condition to drive arrangement's start-up process.

Description

Coupling and road roller

Technical Field

The utility model relates to a transmission technical field particularly, relates to a shaft coupling and road roller.

Background

At present, in common engineering machinery, an engine is started under load when being started, and during construction in an plateau area, the engine of the engineering machinery is easily influenced by the special weather conditions of low temperature and low pressure, so that the engine is difficult to start. The conventional solution is to add a water heater on the engine to heat the engine, but the method needs to add an additional device, is complex in use process, and has low efficiency in a severe weather environment.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to at least one of the problems of the prior art or the related art.

Therefore, the utility model discloses an aim at provides a shaft coupling.

Yet another object of the present invention is to provide a road roller

In order to achieve the above object, a first aspect of the present invention provides a coupling, including: the first connecting disc is used for connecting the output end of the driving device and can rotate along with the output end; the second connecting disc is arranged at one end of the first connecting disc, and a first shaft hole is formed in the second connecting disc; the coupling device is arranged between the first connecting disc and the second connecting disc, the first end of the coupling device is fixedly connected with the first connecting disc, the second end of the coupling device is rotatably connected with the second connecting disc, the second end can be connected with an input shaft of the driven device through the first shaft hole, the second end can be connected with or disconnected from the first end, and when the second end is connected with the first end, the second end can rotate along with the first end.

According to the utility model discloses an aspect technical scheme, the shaft coupling includes first connection pad, second connection pad and shaft coupling device. The first connecting disc is used for connecting the output end of the driving device and can rotate along with the output end of the driving device so as to obtain torque from the driving device and transmit power. The second connecting disc is arranged at one end of the first connecting disc, and the second connecting disc can be installed and connected with the driving device or other components to provide support for the coupling device. In particular, when one end of the first connecting disc is connected with the output end of the driving device, the second connecting disc is arranged at one end of the first connecting disc far away from the driving device. The coupling device is arranged between the first connecting disc and the second connecting disc, and the first end of the coupling device is fixedly connected with the first connecting disc, so that when the first connecting disc is connected with the driving device, power is transmitted to the first end of the coupling device through the first connecting disc; the second end of the coupling device is rotatably connected with the second connecting disc to form support for the coupling device. The second connecting disc is provided with a first shaft hole, and the second end of the coupling device can be connected with the input shaft of the driven device through the first shaft hole. The second end can rotate along with the first end when the second end is connected with the first end so as to drive the input shaft of the driven device to rotate, and power transmission between the driving device and the driven device is realized. The coupler in the scheme can enable the driving device and the driven device to form power transmission or disconnect the power transmission according to actual requirements, so that the power loss of the driving device is reduced, energy is saved, meanwhile, the driving device can be started without carrying, the starting difficulty of the driving device of the engineering machinery provided with the coupler is enabled, the coupler is suitable for construction under severe conditions such as plateau climate and the like, and particularly, the loaded starting of the engine is greatly influenced by the climate conditions for the engineering machinery such as a road roller and the like. The coupler of the scheme can enlarge the application range of engineering machinery, reduce the influence of weather conditions on construction, and is favorable for improving the construction efficiency and reducing the construction cost. Optionally, the first connecting disc is made of nylon.

Additionally, the utility model provides an among the above-mentioned technical scheme shaft coupling can also have following additional technical characterstic:

in the above technical solution, the coupling device includes: the driving piece is connected to one end, facing the second connecting disc, of the first connecting disc and can rotate along with the first connecting disc; the driven part is rotatably connected to one end, facing the first connecting disc, of the second connecting disc and is used for being connected with an input shaft of the driven device; the connecting component is sleeved on the outer side of the driven part in the radial direction and can drive the driven part to rotate, and at least part of the connecting component can move in the axial direction of the driven part so as to realize connection or disconnection between the connecting component and the driving part.

In this technical scheme, the shaft coupling device includes driving member, follower and coupling assembling. The driving part is connected to one end, facing the second connecting disc, of the first connecting disc and can rotate along with the first connecting disc so as to obtain torque through the first connecting disc. The driven part is rotatably connected to one end, facing the first connecting disc, of the second connecting disc and is used for being connected with the input shaft of the driven device so as to drive the input shaft of the driven device to rotate when the driven part rotates. The connecting component is sleeved on the driven part in the radial outer side, so that the driven part is driven to rotate through the connecting component, at least part of the connecting component can move along the axial direction of the driven part, the driven part and the driving part are connected or disconnected through the connecting component, and when the connecting component is connected with the driving part, the output torque of the driving device is transmitted to the input shaft of the driven device through the first connecting disc, the driving part, the connecting component and the driven part in sequence, and power transmission is achieved.

In the above technical scheme, the coupling assembling includes: the sliding block is sleeved on the outer side of the driven piece in the radial direction and is in sliding connection with the driven piece, and a sealing cavity is formed between the sliding block and the second connecting disc; the return spring is arranged in the sealed cavity between the second connecting disc and the sliding block, and two ends of the return spring are respectively connected with the second connecting disc and the sliding block; the connecting piece is located between driving part and the sliding block, and the connecting piece is connected in the radial outside of follower, is equipped with a plurality of friction discs along axial direction on the connecting piece, and wherein, correspond with sealed cavity on the second connection pad and be equipped with the hydraulic oil interface, supply oil drive sliding block to the connecting piece slip in the sealed cavity through the hydraulic oil interface, the sliding block with the driving part is right the friction disc of connecting piece forms the extrusion, realizes being connected of follower and driving part to form tensile to reset spring, when hydraulic oil in sealed cavity passes through the outside discharge of hydraulic oil interface, the sliding block removes to the direction of keeping away from the connecting piece under reset spring's elastic force effect, makes the disconnection between follower and the driving part.

In this technical scheme, coupling assembling includes sliding block, reset spring and connecting piece. The sliding block is sleeved on the outer side of the driven part along the radial direction and is in sliding connection with the driven part, and the sliding block can slide along the axial direction of the driven part; a sealing cavity is formed between the sliding block and the second connecting disc, and a hydraulic oil interface is arranged at the position, corresponding to the sealing cavity, of the second connecting disc and used for being connected with a hydraulic oil pipe. The reset spring is arranged in the sealed cavity between the sliding block and the second connecting disc, and two ends of the reset spring are respectively connected with the sliding block and the second connecting disc. The connecting piece is connected to the outer side of the driven piece along the radial direction and can rotate together with the driven piece; and a plurality of friction plates are arranged on the connecting piece along the axial direction, and the connecting piece is positioned between the driving piece and the sliding block. When the hydraulic oil pipe supplies oil to the sealed cavity through the hydraulic oil interface, the pressure of the hydraulic oil drives the sliding block to slide towards the direction of the driving part, the sliding block and the driving part extrude the friction plates of the connecting part from two ends of the connecting part, and the driving part and the driven part are connected through the friction force of the friction plates, so that the driven part can rotate along with the driving part, and the power transmission between the driving device and the driven device is realized. When the sliding block slides towards the direction of the active piece, the return spring is stretched and has a movement trend of returning to the original state. When the hydraulic oil pipe discharges the hydraulic oil in the sealed cavity outwards through the hydraulic oil interface, the elastic action of the reset spring drives the sliding block to slide towards the direction far away from the driving part, the sliding block is reset, the extrusion force applied to the connecting part is eliminated, the driven part and the driving part are disconnected, and the driven part stops rotating.

In the technical scheme, the hydraulic oil interface comprises an oil injection interface and an oil discharge interface, the oil injection interface is used for being connected with the oil injection pipeline, and the oil discharge interface is used for being connected with the oil discharge pipeline.

According to the technical scheme, the second connecting disc is provided with the oil filling interface and the oil discharging interface respectively, the oil filling interface is used for being connected with the oil filling pipeline, the oil discharging interface is used for being connected with the oil discharging pipeline, when the driven device has a power demand, oil is filled into the sealed cavity through the oil filling pipeline and the oil filling interface, the sliding block is pushed by the pressure of hydraulic oil to slide towards the driving part, the connecting part is extruded, and then the driven part and the driving part are connected to transmit power. When the driven device does not have power requirements, hydraulic oil in the sealed cavity is discharged outwards through the oil discharge interface and the oil discharge pipeline, the hydraulic pressure in the sealed cavity is reduced, the sliding block slides towards the direction far away from the driving part under the action of the elastic force of the reset spring, the connection between the driven part and the driving part is disconnected, and power transmission is stopped.

In the above technical scheme, the coupling assembling includes: the electromagnetic coil is arranged at one end, facing the first connecting disc, of the second connecting disc; the connecting part is sleeved on the outer side of the driven part along the radial direction and is in sliding connection with the driven part, and the connecting part can slide along the axial direction of the driven part; the connecting piece is connected to one end, facing the driving piece, of the connecting part, and a plurality of friction plates are arranged on the connecting piece in the axial direction; the magnet is connected to one end, facing the second connecting disc, of the connecting part, and the magnet is arranged corresponding to the electromagnetic coil; the reset spring is arranged between the connecting part and the driving part, and two ends of the reset spring are respectively connected with the connecting part and the driving part, wherein when the electromagnetic coil is electrified, the magnetic force generated by the electromagnetic coil on the magnet drives the connecting part to slide along the axial direction of the driven part, the connecting part and the driving part are connected or disconnected through the connecting part, and when the electromagnetic coil is powered off, the connecting part is reset through the elastic action of the reset spring.

In this technical scheme, coupling assembling includes solenoid, connecting portion, connecting piece, magnet and reset spring. The electromagnetic coil is arranged at one end of the second connecting disc, which faces the first connecting disc, and can generate magnetic force when being electrified. The connecting part is sleeved on the outer side of the driven part along the radial direction and is in sliding connection with the driven part, the connecting part can rotate together with the driven part, and meanwhile the connecting part can slide along the axial direction of the driven part. The connecting piece is connected to the connecting part, is positioned at one end of the connecting part facing the driving piece and can slide along the axial direction along with the connecting part; the connecting piece is provided with a plurality of friction plates along the axial direction, so that when the connecting piece is driven by the connecting part to move towards the driving piece, the connecting piece is extruded by the connecting part and the driving piece, and the connecting part is connected with the driving piece by the friction force of the friction plates. The magnet is connected to one end, facing the second connecting disc, of the connecting portion and is arranged corresponding to the electromagnetic coil, so that when the electromagnetic coil is electrified to generate magnetic force, the magnet drives the connecting portion to slide along the axial direction of the driven member under the action of the magnetic force. Reset spring establishes between user connecting portion and the initiative piece, and reset spring's both ends are connected with connecting portion and initiative piece respectively to when connecting portion slide along the axial of follower under the effect of magnetic force, reset spring produces elastic deformation, and has the motion trend of reconversion, in order to eliminate the back at magnetic force, drives connecting portion normal position through reset spring's elastic force effect.

In the technical scheme, the magnetic force is attractive force, when the electromagnetic coil is electrified, the attractive force drives the magnet to drive the connecting part to move towards the electromagnetic coil, so that the driven part is disconnected from the driving part, the return spring is stretched, when the electromagnetic coil is powered off, the connecting part moves towards the driving part under the action of the elastic force of the return spring to extrude the connecting part, and the driven part is connected with the driving part; or the magnetic force is repulsive force, when the electromagnetic coil is electrified, the repulsive force drives the magnet to drive the connecting part to move towards the driving part, the connecting part extrudes the connecting part and the reset spring to enable the driven part and the driving part to be connected, and when the electromagnetic coil is powered off, the connecting part moves away from the driving part under the action of the elastic force of the reset spring to enable the driven part and the driving part to be disconnected.

In this solution, there are two situations for the magnetic force generated by energizing the electromagnetic coil. In the first case, the magnetic force of the electromagnetic coil is an attractive force, when the electromagnetic coil is powered off, the connecting part slides towards the driving part under the action of the elastic force of the return spring, the connecting part and the driving part extrude the friction plates of the connecting part, and the connecting part and the driving part are connected through the friction force of the friction plates, so that the driven part can rotate along with the driving part, and the power transmission between the driving device and the driven device is realized. When the electromagnetic coil is powered on, the electromagnetic coil generates attraction to the magnetic body, the magnetic body drives the connecting portion to slide towards the direction of the electromagnetic coil, the connecting portion and the driving piece are in a disconnected state at the moment, power transmission between the driving device and the driven device is stopped, and meanwhile, the sliding of the connecting portion enables the reset spring to generate stretching deformation so that the connecting portion can reset under the elastic action of the reset spring after the electromagnetic coil is powered off. In the second situation, the magnetic force of the electromagnetic coil is repulsive force, when the electromagnetic coil is electrified, the electromagnetic coil repels the magnet, the magnet drives the connecting part to slide towards the direction of the driving part, the connecting part and the driving part extrude the friction plates of the connecting part, the connecting part and the driving part are connected through the friction force of the friction plates, the driven part can rotate along with the driving part, the power transmission between the driving device and the driven device is realized, and meanwhile, the connecting part extrudes the return spring, so that the return spring generates elastic deformation and has the tendency of recovering the original state; when the electromagnetic coil is powered off, the repulsive force disappears, the connecting part slides in the direction away from the driving part under the action of the elastic force of the reset spring, the connecting part is disconnected with the driving part, the driven part is disconnected with the driving part, and power transmission between the driving device and the driven device is stopped.

In above-mentioned technical scheme, reset spring's quantity is a plurality of, and a plurality of reset spring evenly set up along the circumference of follower.

In the technical scheme, the plurality of return springs are uniformly arranged along the circumferential direction of the driven member, so that when the return springs are elastically deformed, the generated elastic force is kept uniform along the circumferential direction, stress conduction is facilitated, part of components in the connecting assembly can move along the axial direction, and the component force in the radial direction due to eccentricity generated in the stress direction is reduced. It can be understood that when a part of the components of the connecting assembly moves in the axial direction of the driven member, if a component force in the radial direction is generated, the friction force with the contact surface of the driven member is increased, and the axial movement is affected.

In the technical scheme, one end of the driven piece, which is far away from the driving piece, extends into the first shaft hole and is rotatably connected with the second connecting disc through the bearing, and the driven piece is provided with a second shaft hole which is coaxial with the first shaft hole and is used for connecting an input shaft of the driven device; and/or a groove which is sunken towards the direction far away from the first connecting disc is formed on the second connecting disc, and the coupling device is arranged in the groove.

In this technical scheme, keep away from the one end of driving part through setting up the follower and stretch into in the first shaft hole to through bearing and second connection pad rotatable coupling, form the support to the follower through the second connection pad, reduce the follower simultaneously through the bearing when rotating and the second connection pad between frictional force, be favorable to increasing the rotational speed of follower. Through setting up and being equipped with the second shaft hole coaxial with first shaft hole on the follower to slave unit's input shaft passes through the second shaft hole and forms with the follower and be connected. Alternatively, the input shaft of the driven device may form a connection with the driven member through a threaded fit, or through a keyed fit. Through being formed with the recess on the second connection pad, and the recess is sunken to the direction of keeping away from first connection pad for the coupling device provides installation space, through locating the coupling device in the recess, accessible second connection pad provides the support to the coupling device on the one hand, and on the other hand can make the coupling device separate with external object, forms the protection to the coupling device, prevents that the operation of coupling device from receiving external object's interference. It can be understood that engineering machine's construction environment is comparatively complicated, if the coupling device exposes in the external world, leads to impurity such as earth, grit to get into the coupling device easily, influences the normal operating of coupling device.

The utility model discloses provide a road roller among the second aspect technical scheme, include: the road roller vehicle body is provided with an engine and a hydraulic system; according to the coupler in any one of the above technical solutions of the first aspect, the first connecting disc of the coupler is connected with the flywheel disc of the engine, and the second connecting disc of the coupler is connected with the flywheel casing of the engine, wherein an input shaft of a hydraulic pump in the hydraulic system extends into the coupler from the first shaft hole and is in transmission connection with a coupling device of the coupler.

According to the utility model discloses second aspect technical scheme, the road roller includes road roller automobile body and the shaft coupling of any one of the above-mentioned first aspect technical scheme. The road roller vehicle body is provided with an engine and a hydraulic system, the engine is used for providing power, the hydraulic system is used for transmitting power to the actuating mechanism, and the coupler is used for realizing connection or disconnection between the output end of the engine and the input end of the hydraulic system. The first connection pad of shaft coupling is connected with the flywheel dish of engine to rotate along with the flywheel dish, transmission torque, the second connection pad of shaft coupling is connected with the bell housing of engine, with install the shaft coupling, provides the support to the shaft coupling device of shaft coupling simultaneously. The hydraulic system comprises a hydraulic pump, an input shaft of the hydraulic pump extends into the coupler from the first shaft hole and is in transmission connection with the coupling device of the coupler, so that when the coupling device is in a connection state, the input shaft of the hydraulic pump rotates along with the first connecting disc, power transmission between the engine and the hydraulic system is achieved, power is output to the executing mechanism, and the road roller can normally carry out construction operation or running. When the hydraulic pump has no power demand, the input shaft of the hydraulic pump and the first connecting disc can be disconnected through the coupling device, so that the load of the engine is reduced. Particularly, in the starting process of the engine, the connection with the hydraulic pump is disconnected, so that the starting difficulty of the engine can be effectively reduced, and particularly, when the road roller is constructed in environments with severe weather conditions such as plateau areas or severe cold areas, the adverse effect of the weather conditions on the starting of the engine can be effectively reduced. In addition, the road roller in this scheme should still have all the beneficial effects of the shaft coupling of any one of the above-mentioned first aspect technical solutions, and no further description is provided herein.

In the above technical solution, the road roller further includes: the temperature sensor is arranged on the road roller body and used for detecting the environmental temperature; and the controller is electrically connected with the temperature sensor, the coupler and the engine, and controls the coupler to operate according to the ambient temperature detected by the temperature sensor and the rotating speed of the engine, so that the engine is connected with or disconnected from the hydraulic pump.

In the technical scheme, the road roller further comprises a temperature sensor and a controller. The temperature sensor is arranged on the vehicle body of the road roller and can move along with the vehicle body of the road roller so as to detect the environmental temperature of the environment where the road roller is located. The controller is respectively electrically connected with the temperature sensor, the coupler and the engine so as to control the operation of the coupler according to the environment temperature information detected by the temperature sensor and the rotating speed information of the engine, and further control the connection or disconnection between the engine and the hydraulic pump. The controller determines the current environment temperature of the environment where the road roller is located according to the detection data of the temperature sensor, and determines the current running state of the engine according to the rotating speed information of the engine. Specifically, when the ambient temperature is lower than the preset temperature and the engine is in a stop state, the controller controls the coupler to disconnect the connection between the engine and the hydraulic pump, so that the engine can be started without load when being started, and the starting difficulty of the engine is reduced. After the engine is started, when the rotating speed of the engine exceeds the preset rotating speed, the temperature of the engine reaches a temperature value capable of running with load, and at the moment, the controller controls the coupler to run, so that the engine is connected with the hydraulic pump, and the road roller runs normally.

It should be noted that the preset temperature and the preset rotation speed can be set according to the specific model of the engine. Alternatively, the preset temperature may be-30 ℃ to 0 ℃; the preset rotation speed may be 600rpm to 2000 rpm.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 shows a schematic structural view of a coupling according to an embodiment of the invention;

fig. 2 shows a schematic structural view of a coupling according to an embodiment of the invention;

fig. 3 shows a schematic structural view of a coupling according to an embodiment of the invention;

fig. 4 shows a schematic structural view of a coupling according to an embodiment of the invention;

fig. 5 shows a schematic structural view of a coupling according to an embodiment of the invention;

fig. 6 shows a schematic structural view of a coupling according to an embodiment of the invention.

Wherein, the correspondence between the reference numbers and the components in fig. 1 to 6 is as follows:

the connecting device comprises a first connecting disc 1, a second connecting disc 2, a first shaft hole 21, a hydraulic oil interface 22, a 221 oil filling interface, a 222 oil discharging interface, a groove 23, a 3 coupling device, a 31 driving part, a 32 driven part, a 321 second shaft hole, a 33 connecting component, a 331 sliding block, a 332 reset spring, a 333 connecting part, a 334 electromagnetic coil, a 335 connecting part, a 336 magnet, a 337 first bearing and a 338 second bearing.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A coupling and road roller according to some embodiments of the invention will now be described with reference to figures 1 to 6.

Example one

The present embodiment provides a coupling, as shown in fig. 1, including a first connecting disc 1, a second connecting disc 2, and a coupling device 3. The first connecting disc 1 is used for connecting the output end of the driving device and can rotate together with the output end of the driving device so as to transmit torque. The second connecting disc 2 is correspondingly arranged at one end of the first connecting disc 1, and a mounting hole is formed in the second connecting disc 2 so as to facilitate mounting, and the second connecting disc 2 can play a supporting role. The coupling device 3 is arranged between the first connecting disc 1 and the second connecting disc 2, the coupling device 3 comprises a first end and a second end, the first end is fixedly connected with the first connecting disc 1, the second end is rotatably connected with the second connecting disc 2, and the second end can be connected with or disconnected from the first end. The second connecting plate 2 is provided with a first shaft hole 21 so that the input shaft of the driven device is connected with the second end of the coupling device 3. When the second end of the coupling device 3 is connected with the first end, the second end can rotate together with the first end and the first connecting disc 1 to drive the input shaft of the driven device to rotate, so that power transmission between the driving device and the driven device is realized. Specifically, the input shaft of the driven device can extend into the coupling from the first shaft hole 21 and is in transmission connection with the second end of the coupling device 3.

Example two

The present embodiment provides a coupling, as shown in fig. 2, including a first connecting disc 1, a second connecting disc 2, and a coupling device 3. The first connecting disc 1 is used for connecting the output end of the driving device and can rotate together with the output end of the driving device so as to transmit torque. The second connecting disc 2 is correspondingly arranged at one end of the first connecting disc 1, and a mounting hole is formed in the second connecting disc 2 so as to facilitate mounting; the second connecting disc 2 is provided with a groove 23 which is sunken towards the direction far away from the first connecting disc 1, the coupling device 3 is arranged in the groove, and the second connecting disc 2 plays a supporting role in the coupling device 3. The coupling device 3 is arranged between the first connecting disc 1 and the second connecting disc 2, the coupling device 3 comprises a driving part 31, a driven part 32 and a connecting component 33, wherein the driving part 31 is fixedly connected with the first connecting disc 1 and can rotate along with the first connecting disc 1; the driven member 32 is rotatably connected with the second connecting disc 2, and the driven member 32 can be in transmission connection with an input shaft of a driven device. The connecting assembly 33 is sleeved on the driven member 32 along the radial direction, and the connecting assembly 33 can drive the driven member 32 to rotate. At least part of the connecting assembly 33 can move along the axial direction of the driven member 32, the connecting assembly 33 can be connected with or disconnected from the driving member 31 through the axial movement, and when the connecting assembly 33 is in a connecting state with the driving member 31, the connecting assembly 33 can rotate together with the driving member 31 and the first connecting disc 1, so that the driven member 32 is driven to rotate, and the power transmission between the driving device and the driven device is realized. The second connecting disc 2 is provided with a first shaft hole 21 to facilitate the driving connection between the input shaft of the driven device and the driven member 32. Specifically, the input shaft of the driven device can extend into the coupling from the first shaft hole 21 and is in transmission connection with the second end of the coupling device 3.

EXAMPLE III

The present embodiment provides a coupling, as shown in fig. 3, including a first connecting plate 1, a second connecting plate 2, and a coupling device 3. The first connecting disc 1 is used for connecting the output end of the driving device and can rotate together with the output end of the driving device so as to transmit torque. The second connecting disc 2 is correspondingly arranged at one end of the first connecting disc 1, and a mounting hole is formed in the second connecting disc 2 so as to facilitate mounting; the second connecting disc 2 is provided with a groove 23 which is sunken towards the direction far away from the first connecting disc 1, the coupling device 3 is arranged in the groove, and the second connecting disc 2 plays a supporting role in the coupling device 3. The coupling device 3 is arranged between the first connecting disc 1 and the second connecting disc 2, the coupling device 3 comprises a driving part 31, a driven part 32 and a connecting component 33, wherein the driving part 31 is fixedly connected with the first connecting disc 1 and can rotate along with the first connecting disc 1; the driven piece 32 is rotatably connected with the second connecting disc 2, the second connecting disc 2 is provided with a first shaft hole 21, and an input shaft of the driven device can extend into the driven piece 32 from the first shaft hole 21; the driven member 32 is provided with a second shaft hole 321 which can be matched with the input shaft of the driven device, and is used for being in transmission connection with the input shaft of the driven device. The connecting assembly 33 is sleeved on the driven member 32 along the radial direction, and the connecting assembly 33 can drive the driven member 32 to rotate. At least part of the connecting assembly 33 can move along the axial direction of the driven member 32, the connecting assembly 33 can be connected with or disconnected from the driving member 31 through the axial movement, and when the connecting assembly 33 is in a connecting state with the driving member 31, the connecting assembly 33 can rotate together with the driving member 31 and the first connecting disc 1, so that the driven member 32 is driven to rotate, and the power transmission between the driving device and the driven device is realized.

Specifically, the connecting assembly 33 includes a sliding block 331, a connecting member 333, and a return spring 332. The sliding block 331 is disposed on the outer side of the follower 32 in the radial direction, is connected to the follower 32 in a sliding manner, and can slide along the axial direction of the follower 32. A sealing cavity is formed between the sliding block 331 and the second connecting disc 2, and a hydraulic oil interface 22 is correspondingly arranged on the second connecting disc 2 and corresponds to the sealing cavity, so that oil is injected into the sealing cavity through the hydraulic oil interface 22 or discharged from the sealing cavity to the outside, and the axial movement of the sliding block 331 is driven by increasing the pressure of the hydraulic oil in the sealing cavity. The number of the return springs 332 is plural, and the return springs 332 are all arranged between the sliding block 331 and the second connecting disc 2, the return springs 332 are uniformly arranged along the circumferential direction of the driven member 32, and two ends of each return spring 332 are respectively connected with the sliding block 331 and the second connecting disc 2. The connecting piece 333 is arranged between the driving piece 31 and the sliding block 331, and the connecting piece 333 is sleeved outside the driven piece 32, is connected with the driven piece 32 and can rotate together with the driven piece 32; the connecting member 333 is provided with a plurality of friction plates in the axial direction, and when both ends of the connecting member 333 are pressed, the plurality of friction plates are attached to each other, and a large frictional force is generated. When oil is injected into the sealed cavity through the hydraulic oil interface 22, the pressure of the hydraulic oil in the sealed cavity rises, the sliding block 331 is pushed to slide towards the driving part 31, the sliding block 331 and the driving part 31 extrude two ends of the connecting part 333, so that friction force is generated on the friction plate, the driven part 32 is connected with the driving part 31 through the friction force, the driven part 32 can rotate together with the driving part 31, and power transmission between the driving device and the driven device is realized. Meanwhile, the sliding block 331 makes the return spring 332 form tensile deformation and generate elastic force, when oil is discharged outwards in the sealed chamber, the pressure of hydraulic oil is reduced, the sliding block 331 moves in the direction away from the driving part 31 under the action of the elastic force of the return spring 332, so that the return is realized, the driven part 32 is disconnected from the driving part 31, and the power transmission is stopped.

Alternatively, the second shaft hole 321 may be connected to the input shaft of the driven device by a screw-fit or a key-and-groove fit.

Further, as shown in fig. 4, the hydraulic oil interface 22 includes an oil filling interface 221 and an oil discharging interface 222, the oil filling interface 221 is used for connecting an oil filling pipeline, and the oil discharging interface 222 is used for connecting an oil discharging pipeline, so as to change the hydraulic oil pressure in the sealed cavity by filling oil into the sealed cavity or discharging oil from the sealed cavity to the outside, and control the axial sliding of the sliding block 331.

Example four

The present embodiment provides a coupling, as shown in fig. 5, including a first connecting disc 1, a second connecting disc 2, and a coupling device 3. The first connecting disc 1 is used for connecting the output end of the driving device and can rotate together with the output end of the driving device so as to transmit torque. The second connecting disc 2 is correspondingly arranged at one end of the first connecting disc 1, and a mounting hole is formed in the second connecting disc 2 so as to facilitate mounting; the second connecting disc 2 is provided with a groove 23 which is sunken towards the direction far away from the first connecting disc 1, the coupling device 3 is arranged in the groove, and the second connecting disc 2 plays a supporting role in the coupling device 3. The coupling device 3 is arranged between the first connecting disc 1 and the second connecting disc 2, the coupling device 3 comprises a driving part 31, a driven part 32 and a connecting component 33, wherein the driving part 31 is fixedly connected with the first connecting disc 1 and can rotate along with the first connecting disc 1; the driven piece 32 is rotatably connected with the second connecting disc 2, the second connecting disc 2 is provided with a first shaft hole 21, and an input shaft of the driven device can extend into the driven piece 32 from the first shaft hole 21; the driven member 32 is provided with a second shaft hole 321 which can be matched with the input shaft of the driven device, and is used for being in transmission connection with the input shaft of the driven device. Wherein, be equipped with first bearing 337 in the first shaft hole 21, be equipped with second bearing 338 in the driving piece 31, follower 32 forms the support through first bearing 337 and second bearing 338 respectively along axial both ends. The connecting assembly 33 is sleeved on the driven member 32 along the radial direction, and the connecting assembly 33 can drive the driven member 32 to rotate. At least part of the connecting assembly 33 can move along the axial direction of the driven member 32, the connecting assembly 33 can be connected with or disconnected from the driving member 31 through the axial movement, and when the connecting assembly 33 is in a connecting state with the driving member 31, the connecting assembly 33 can rotate together with the driving member 31 and the first connecting disc 1, so that the driven member 32 is driven to rotate, and the power transmission between the driving device and the driven device is realized.

Specifically, the connecting assembly 33 includes an electromagnetic coil 334, a connecting portion 335, a connecting member 333, a magnet 336, and a return spring 332. The connecting portion 335 is disposed on the outer side of the driven member 32 in the radial direction, and is slidably connected to the driven member 32, and the connecting portion 335 is slidable along the axial direction of the driven member 32. The connecting piece 333 is connected to the connecting part 335, is located at one end of the connecting part 335 facing the driving piece 31, and can slide along with the connecting part 335 in the axial direction; the connecting member 333 is provided with a plurality of friction plates in the axial direction, and when both ends of the connecting member 333 are pressed, the plurality of friction plates are attached to each other, and a large frictional force is generated. The number of the return springs 332 is plural, and the return springs 332 are all arranged between the connecting portion 335 and the driving member 31, the return springs 332 are uniformly arranged along the circumferential direction of the connecting portion 335, and two ends of each return spring 332 are respectively connected with the connecting portion 335 and the driving member 31. The electromagnetic coil 334 is provided at an end of the second land 2 facing the first land 1, and the magnetic body 336 and the electromagnetic coil 334 are connected to an end of the connecting portion 335 facing the second land 2 and are provided corresponding to the electromagnetic coil 334. When the electromagnetic coil 334 is powered off, the connecting part 335 slides towards the driving part 31 under the action of the elastic force of the return spring 332, the connecting part 335 and the driving part 31 extrude the connecting part 333 from two ends of the connecting part 333, the connecting part 335 and the driving part 31 are connected through the friction force of the friction plate, and then the driven part 32 is driven to rotate together with the driving part 31 and the first connecting disc 1, so that the power transmission between the driving device and the driven device is realized. When the electromagnetic coil 334 is energized, the electromagnetic coil 334 generates an attraction force on the magnet 336, the magnet 336 drives the connecting part 335 to slide towards the electromagnetic coil 334 under the action of the attraction force, the pressure on the connecting part 333 is reduced or eliminated, the connecting part 335 and the driving part 31 are disconnected, and the power transmission is stopped.

EXAMPLE five

The present embodiment provides a coupling, as shown in fig. 6, including a first connecting disc 1, a second connecting disc 2, and a coupling device 3. The first connecting disc 1 is used for connecting the output end of the driving device and can rotate together with the output end of the driving device so as to transmit torque. The second connecting disc 2 is correspondingly arranged at one end of the first connecting disc 1, and a mounting hole is formed in the second connecting disc 2 so as to facilitate mounting; the second connecting disc 2 is provided with a groove 23 which is sunken towards the direction far away from the first connecting disc 1, the coupling device 3 is arranged in the groove, and the second connecting disc 2 plays a supporting role in the coupling device 3. The coupling device 3 is arranged between the first connecting disc 1 and the second connecting disc 2, the coupling device 3 comprises a driving part 31, a driven part 32 and a connecting component 33, wherein the driving part 31 is fixedly connected with the first connecting disc 1 and can rotate along with the first connecting disc 1; the driven piece 32 is rotatably connected with the second connecting disc 2, the second connecting disc 2 is provided with a first shaft hole 21, and an input shaft of the driven device can extend into the driven piece 32 from the first shaft hole 21; the driven member 32 is provided with a second shaft hole 321 which can be matched with the input shaft of the driven device, and is used for being in transmission connection with the input shaft of the driven device. Wherein, be equipped with first bearing 337 in the first shaft hole 21, be equipped with second bearing 338 in the driving piece 31, follower 32 forms the support through first bearing 337 and second bearing 338 respectively along axial both ends. The connecting assembly 33 is sleeved on the driven member 32 along the radial direction, and the connecting assembly 33 can drive the driven member 32 to rotate. At least part of the connecting assembly 33 can move along the axial direction of the driven member 32, the connecting assembly 33 can be connected with or disconnected from the driving member 31 through the axial movement, and when the connecting assembly 33 is in a connecting state with the driving member 31, the connecting assembly 33 can rotate together with the driving member 31 and the first connecting disc 1, so that the driven member 32 is driven to rotate, and the power transmission between the driving device and the driven device is realized.

Specifically, the connecting assembly 33 includes an electromagnetic coil 334, a connecting portion 335, a connecting member 333, a magnet 336, and a return spring 332. The connecting portion 335 is disposed on the outer side of the driven member 32 in the radial direction, and is slidably connected to the driven member 32, and the connecting portion 335 is slidable along the axial direction of the driven member 32. The connecting piece 333 is connected to the connecting part 335, is located at one end of the connecting part 335 facing the driving piece 31, and can slide along with the connecting part 335 in the axial direction; the connecting member 333 is provided with a plurality of friction plates in the axial direction, and when both ends of the connecting member 333 are pressed, the plurality of friction plates are attached to each other, and a large frictional force is generated. The number of the return springs 332 is plural, and the return springs 332 are all arranged between the connecting portion 335 and the driving member 31, the return springs 332 are uniformly arranged along the circumferential direction of the connecting portion 335, and two ends of each return spring 332 are respectively connected with the connecting portion 335 and the driving member 31. The electromagnetic coil 334 is provided at an end of the second land 2 facing the first land 1, and the magnetic body 336 and the electromagnetic coil 334 are connected to an end of the connecting portion 335 facing the second land 2 and are provided corresponding to the electromagnetic coil 334. When the electromagnetic coil 334 is energized, the electromagnetic coil 334 generates repulsive force to the magnet 336, the magnet 336 drives the connecting part 335 to slide towards the driving part 31 under the action of the repulsive force, the connecting part 335 and the driving part 31 extrude the connecting part 333 from two ends of the connecting part 333, the connecting part 335 and the driving part 31 are connected through the friction force of the friction plates, and then the driven part 32 is driven to rotate together with the driving part 31 and the first connecting disc 1, so that the power transmission between the driving device and the driven device is realized. At the same time, the connecting portion 335 presses the return spring 332, so that the return spring 332 is elastically deformed and tends to return to its original shape. When the electromagnetic coil 334 is de-energized, the repulsive force of the electromagnetic coil 334 to the magnetic body 336 disappears, the magnetic body 336 drives the connecting part 335 to slide towards the electromagnetic coil 334 under the action of the elastic force of the return spring 332, the pressure applied to the connecting part 333 is reduced or eliminated, the connecting part 335 and the driving part 31 are disconnected, and the power transmission is stopped.

EXAMPLE six

The embodiment provides a road roller, which comprises a road roller body and the coupling of any one of the first embodiment to the fifth embodiment. The road roller vehicle body is provided with an engine and a hydraulic system, the engine is used for providing power, the hydraulic system is used for transmitting power to the actuating mechanism, and the coupler is used for realizing connection or disconnection between the output end of the engine and the input end of the hydraulic system. The first connection pad 1 of shaft coupling is connected with the flywheel dish of engine to rotate along with the flywheel dish, the second connection pad 2 of shaft coupling is connected with the bell housing of engine, with install the shaft coupling, provides the support to the shaft coupling device 3 of shaft coupling simultaneously. The hydraulic system comprises a hydraulic pump, an input shaft of the hydraulic pump extends into the coupler from the first shaft hole 21 and is in transmission connection with the coupling device 3 of the coupler, so that when the coupling device 3 is in a connection state, the input shaft of the hydraulic pump rotates together with the first connecting disc 1, power transmission between the engine and the hydraulic system is achieved, power is output to the executing mechanism, and the road roller can normally carry out construction operation or running. When the hydraulic pump has no power demand, the connection between the input shaft of the hydraulic pump and the first connecting disc 1 can be disconnected through the coupling device 3, so that the load of the engine can be reduced. Particularly, in the starting process of the engine, the connection with the hydraulic pump is disconnected, so that the starting difficulty of the engine can be effectively reduced, and particularly, when the road roller is constructed in environments with severe weather conditions such as plateau areas, the adverse effect of the weather conditions on the starting of the engine can be effectively reduced. In addition, the road roller in this scheme should also have all the beneficial effects of the coupling of any one of the first to fifth embodiments, which are not described herein again.

EXAMPLE seven

The embodiment provides a road roller, which comprises a road roller body, a temperature sensor, a controller and the coupling in any one of the first embodiment to the fifth embodiment. The road roller vehicle body is provided with an engine and a hydraulic system, the engine is used for providing power, the hydraulic system is used for transmitting power to the actuating mechanism, and the coupler is used for realizing connection or disconnection between the output end of the engine and the input end of the hydraulic system. The first connection pad 1 of shaft coupling is connected with the flywheel dish of engine to rotate along with the flywheel dish, the second connection pad 2 of shaft coupling is connected with the bell housing of engine, with install the shaft coupling, provides the support to the shaft coupling device 3 of shaft coupling simultaneously. The hydraulic system comprises a hydraulic pump, an input shaft of the hydraulic pump extends into the coupler from the first shaft hole 21 and is in transmission connection with the coupling device 3 of the coupler, so that when the coupling device 3 is in a connection state, the input shaft of the hydraulic pump rotates together with the first connecting disc 1, power transmission between the engine and the hydraulic system is achieved, power is output to the executing mechanism, and the road roller can normally carry out construction operation or running.

The temperature sensor is arranged on the vehicle body of the road roller and can move along with the vehicle body of the road roller so as to detect the environmental temperature of the environment where the road roller is located. The controller is respectively electrically connected with the temperature sensor, the coupler and the engine so as to control the operation of the coupler according to the environment temperature information detected by the temperature sensor and the rotating speed information of the engine, and further control the connection state between the engine and the hydraulic pump. The controller determines the current environment temperature of the environment where the road roller is located according to detection data of the temperature sensor, and determines the current running state of the engine according to rotating speed information of the engine. Specifically, when the ambient temperature is lower than the preset temperature and the engine is in a stop state, the controller controls the coupler to disconnect the connection between the engine and the hydraulic pump, so that the engine can be started without load when being started, and the starting difficulty of the engine is reduced. After the engine is started, when the rotating speed of the engine exceeds the preset rotating speed, the temperature of the engine is indicated to reach a temperature value capable of running with load, and at the moment, the controller controls the coupler to run, so that the engine is connected with the hydraulic pump, and the road roller runs normally.

The road roller in the embodiment can effectively reduce the starting difficulty of the engine, and particularly can effectively reduce the adverse effect of the weather conditions on the starting of the engine when the road roller is constructed in environments with severe weather conditions such as plateau areas or severe cold areas. In addition, the road roller in this scheme should also have all the beneficial effects of the coupling of any one of the first to fifth embodiments, which are not described herein again.

Above combine the figure to explain in detail the technical scheme of the utility model, the shaft coupling can realize being connected or breaking off between drive arrangement and the slave unit according to the demand to reduce drive arrangement's load when drive arrangement starts, reduce drive arrangement's the start-up degree of difficulty, reduce the influence of weather condition to drive arrangement's start-up process, be favorable to improving engineering machine's efficiency of construction, but the energy saving reduces use cost simultaneously.

In the present application, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A coupling, comprising:

the first connecting disc (1) is used for connecting the output end of a driving device, and the first connecting disc (1) can rotate along with the output end;

the second connecting disc (2) is arranged at one end of the first connecting disc (1), and a first shaft hole (21) is formed in the second connecting disc (2);

the coupling device (3) is arranged between the first connecting disc (1) and the second connecting disc (2), the first end of the coupling device (3) is fixedly connected with the first connecting disc (1), the second end of the coupling device (3) is rotatably connected with the second connecting disc (2),

the second end can be connected with an input shaft of a driven device through the first shaft hole (21), the second end can be connected with or disconnected from the first end, and when the second end is connected with the first end, the second end can rotate along with the first end.

2. A coupling according to claim 1, characterized in that the coupling device (3) comprises:

the driving piece (31) is connected to one end, facing the second connecting disc (2), of the first connecting disc (1), and the driving piece (31) can rotate along with the first connecting disc (1);

a driven member (32) rotatably connected to one end of the second connecting disc (2) facing the first connecting disc (1), wherein the driven member (32) is used for being connected with an input shaft of the driven device;

the connecting component (33) is sleeved on the driven component (32) in the radial outer side, the connecting component (33) can drive the driven component (32) to rotate, and at least part of the connecting component (33) can move along the axial direction of the driven component (32) so as to realize the connection or disconnection between the connecting component (33) and the driving component (31).

3. A coupling according to claim 2, characterized in that the connecting assembly (33) comprises:

the sliding block (331) is sleeved on the outer side of the driven piece (32) in the radial direction and is in sliding connection with the driven piece (32), and a sealing cavity is formed between the sliding block (331) and the second connecting disc (2);

the return spring (332) is arranged in a sealed cavity between the second connecting disc (2) and the sliding block (331), and two ends of the return spring (332) are respectively connected with the second connecting disc (2) and the sliding block (331);

a connecting member (333) provided between the driving member (31) and the sliding block (331), the connecting member (333) being connected to the driven member (32) at the outer side in the radial direction, the connecting member (333) being provided with a plurality of friction plates in the axial direction,

wherein, on second connection pad (2) with sealed cavity corresponds and is equipped with hydraulic oil interface (22), through hydraulic oil interface (22) to the drive of supplying oil in the sealed cavity sliding block (331) to connecting piece (333) slide, sliding block (331) with driving piece (31) are right the friction disc of connecting piece (333) forms the extrusion, realizes follower (32) with the connection of driving piece (31), and right reset spring (332) form tensile, and hydraulic oil in the sealed cavity passes through when hydraulic oil interface (22) outwards discharges, sliding block (331) are in under the spring action of reset spring (332) to keeping away from the direction removal of connecting piece (333), make follower (32) with disconnect between driving piece (31).

4. The coupling according to claim 3,

the hydraulic oil interface (22) comprises an oil injection interface (221) and an oil discharge interface (222), the oil injection interface (221) is used for being connected with an oil injection pipeline, and the oil discharge interface (222) is used for being connected with an oil discharge pipeline.

5. A coupling according to claim 2, characterized in that the connecting assembly (33) comprises:

the electromagnetic coil (334) is arranged at one end, facing the first connecting disc (1), of the second connecting disc (2);

the connecting part (335) is sleeved on the outer side of the driven part (32) in the radial direction and is connected with the driven part (32) in a sliding manner, and the connecting part (335) can slide along the axial direction of the driven part (32);

the connecting piece (333) is connected to one end, facing the driving piece (31), of the connecting part (335), and a plurality of friction plates are arranged on the connecting piece (333) in the axial direction;

a magnet (336) attached to one end of the connecting portion (335) facing the second connecting plate (2), the magnet (336) being provided in correspondence with the electromagnetic coil (334);

a return spring (332) disposed between the connecting portion (335) and the driving member, both ends of the return spring (332) being connected to the connecting portion (335) and the driving member, respectively,

when the electromagnetic coil (334) is electrified, the magnetic force generated by the electromagnetic coil (334) on the magnet (336) drives the connecting part (335) to slide along the axial direction of the driven part (32), the connecting part (335) is connected or disconnected with the driving part through the connecting part (333), and when the electromagnetic coil (334) is powered off, the connecting part (335) is reset through the elastic force action of the reset spring (332).

6. The coupling according to claim 5,

the magnetic force is attractive force, when the electromagnetic coil (334) is powered on, the attractive force drives the magnet (336) to drive the connecting part (335) to slide towards the electromagnetic coil (334), the driven part (32) is disconnected with the driving part, meanwhile, the return spring (332) is stretched, when the electromagnetic coil (334) is powered off, the connecting part (335) slides towards the driving part under the elastic force of the return spring (332), and the connecting part (333) is squeezed, so that the driven part (32) is connected with the driving part; or

The magnetic force is a repulsive force, when the electromagnetic coil (334) is electrified, the repulsive force drives the magnet (336) to drive the connecting part (335) to slide towards the driving part, the connecting part (335) presses the connecting part (333) and the return spring (332) to enable the driven part (32) and the driving part to be connected, and when the electromagnetic coil (334) is powered off, the connecting part (335) slides towards the direction far away from the driving part under the action of the elastic force of the return spring (332) to enable the driven part (32) and the driving part to be disconnected.

7. A coupling according to claim 3 or 5,

the number of the return springs (332) is multiple, and the return springs (332) are uniformly arranged along the circumferential direction of the driven member (32).

8. The coupling of claim 2,

one end, far away from the driving part, of the driven part (32) extends into the first shaft hole (21) and is rotatably connected with the second connecting disc (2) through a bearing, and a second shaft hole (321) which is coaxial with the first shaft hole (21) is formed in the driven part (32) and is used for being connected with an input shaft of the driven device; and/or

A groove (23) which is sunken towards the direction far away from the first connecting disc (1) is formed in the second connecting disc (2), and the coupling device (3) is arranged in the groove (23).

9. A roller, comprising:

the road roller vehicle body is provided with an engine and a hydraulic system;

a coupling according to any one of claims 1 to 8, the first coupling disc (1) of which is connected to the flywheel disc of the engine and the second coupling disc (2) of which is connected to the flywheel housing of the engine,

the input shaft of a hydraulic pump in the hydraulic system extends into the coupler from the first shaft hole (21) and is in transmission connection with the coupling device (3) of the coupler.

10. The compactor of claim 9, further comprising:

the temperature sensor is arranged on the road roller body and used for detecting the environmental temperature;

and the controller is electrically connected with the temperature sensor and the coupler, and controls the coupler to operate according to the ambient temperature detected by the temperature sensor so as to realize connection or disconnection between the engine and the hydraulic pump.