CN107448491B - Automatic disengaging type coupling for rolling-in foreign matter - Google Patents
Automatic disengaging type coupling for rolling-in foreign matter Download PDFInfo
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- CN107448491B CN107448491B CN201710422757.3A CN201710422757A CN107448491B CN 107448491 B CN107448491 B CN 107448491B CN 201710422757 A CN201710422757 A CN 201710422757A CN 107448491 B CN107448491 B CN 107448491B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D9/00—Couplings with safety member for disconnecting, e.g. breaking or melting member
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Abstract
The invention provides a foreign matter rolling-in automatic disengaging type coupler, which comprises a coupler inner ring, clutch blocks, a coupler outer ring, a foreign matter contact plate, a linkage mechanism and free rolling bodies, wherein the coupler inner ring is connected with a transmission shaft; a plurality of foreign matter contact plates are arranged on the periphery of the outer ring of the coupler along the circumferential direction and are connected with the clutch block through a linkage mechanism, the foreign matter contact plates move under the pressure action of foreign matters and drive the clutch block to be separated from the inner ring of the coupler through the linkage mechanism, and the power transmission of the transmission shaft is cut off; the free rolling body is freely rotatably mounted on the periphery of the foreign matter contact plate. The automatic disengaging type coupling for foreign matter rolling in can perform corresponding actions aiming at different external forces so as to achieve the protection purpose.
Description
Technical Field
The invention relates to the technical field of mechanical transmission devices, in particular to an automatic disengaging type coupling for rolling in foreign matters.
Background
The coupling is a mechanical part for coupling two shafts (a driving shaft and a driven shaft) of different mechanisms to rotate together to transmit torque. Generally, a coupling consists of two halves, which are respectively mounted on a driving shaft and a driven shaft, and is a connecting part of a power machine and a working machine which is very common in application.
The existing coupler, no matter what type, needs to install a coupler protective cover at the periphery of the coupler so as to prevent people or foreign matters from being drawn into the coupler when the rotating equipment runs and causing casualties or equipment damage. However, the protective cover of the coupling can only provide limited protection, and when the impact strength exceeds the bearing capacity of the protective cover or the protective cover is loosened, personnel or foreign matters are very easy to be involved into the coupling, so that casualties or equipment damage is caused.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The invention aims to provide an automatic disengaging type coupling for rolling in foreign matters, and in order to achieve the aim, the invention adopts the following technical scheme:
the foreign matter is rolled into the automatic disengaging type shaft coupling, including inner race of the shaft coupling, clutch block, outer race of the shaft coupling, foreign matter contact plate, link gear and free rolling element, the said inner race of the shaft coupling is connected with drive shaft, the periphery of inner race of the shaft coupling sets up a plurality of clutch blocks that can move along its radial direction along the circumference, the outside of the clutch block is connected with outer race of the shaft coupling, the inboard of the clutch block holds/disengages the inner race of the shaft coupling tightly; a plurality of foreign matter contact plates are arranged on the periphery of the outer ring of the coupler along the circumferential direction and are connected with the clutch block through a linkage mechanism, the foreign matter contact plates move under the pressure action of foreign matters and drive the clutch block to be separated from the inner ring of the coupler through the linkage mechanism, and the power transmission of the transmission shaft is cut off; the free rolling body is freely rotatably mounted on the periphery of the foreign matter contact plate.
Furthermore, the free rolling body is a concentric sleeve which is sleeved on the periphery of the foreign matter contact plate and can freely rotate relative to the foreign matter contact plate.
Furthermore, a rolling mechanism is arranged between the concentric sleeve and the foreign matter contact plate, so that the concentric sleeve can freely rotate relative to the foreign matter contact plate.
Further, the rolling mechanism is a bearing, the foreign matter contact plate is in interference fit with an inner ring of the bearing, and an outer ring of the bearing is in interference fit with the concentric sleeve.
Further, the bearing comprises a plurality of bearings which are distributed along the axial direction of the foreign matter contact plate.
Furthermore, the rolling mechanism is a ball, an arc-shaped groove with two closed ends is formed in the outer peripheral wall of the foreign matter contact plate, the ball is limited in the arc-shaped groove and can rotate freely, and the ball is in contact with the foreign matter contact plate and the concentric sleeve respectively.
Further, the free rolling bodies are a plurality of rolling cylinders distributed along the circumferential direction of the outer surface of the foreign matter contact plate, and the central axis of each rolling cylinder is parallel to the central axis of the coupler.
Furthermore, the device also comprises a supporting structure fixed on the outer wall of the foreign matter contact plate, and the rolling cylinder body can be freely and rotatably arranged on the supporting structure.
Furthermore, the supporting structure comprises a cylinder supporting rod and a cylinder shaft, wherein one end of the cylinder supporting rod is fixed on the outer wall of the foreign matter contact plate, and the other end of the cylinder supporting rod is connected with the cylinder shaft; the cylinder shaft is arranged in parallel with the central axis of the coupler; the rolling cylinder body is rotatably arranged on the cylinder body shaft.
Furthermore, the supporting structure comprises a cylinder supporting rod and a cylinder shaft, wherein one end of the cylinder supporting rod is fixed on the outer wall of the foreign matter contact plate, and the other end of the cylinder supporting rod is connected with the cylinder shaft; the cylinder shaft is arranged in parallel with the central axis of the coupler; the drum body shaft is connected with the drum body supporting rod in a free rotating mode, and the rolling drum body is fixedly installed on the drum body shaft.
Furthermore, the free rolling body is an elastic rolling cylinder body which is made of elastic materials and has a soft outer surface; or, an elastic body with a soft surface is arranged on the outer surface of the free rolling body.
The free rolling body capable of freely rotating is additionally arranged on the outer ring of the coupler, the radial friction force generated by the coupler and the contact object can cause the rolling cylinder to rotate, the sliding friction force of the coupler and the contact object is converted into the rolling friction force between the free rolling body and the contact object, namely, the friction force between the contact object and the coupler (the free rolling body) is equal to the force for maintaining the rotation of the free rolling body in the state, and the radial friction force between the coupler and the contact object is greatly reduced.
If the contact force between the contact object and the coupler is large and exceeds the protection capability of the external free rolling body, the foreign body contact plate is subjected to an internal force, the foreign body contact plate is driven to be connected with the foreign body contact plate to generate centripetal motion after being subjected to the force, the internal gear is driven to rotate, the clutch block is driven to be connected with the rack to generate centrifugal motion, the clutch block is separated from the inner ring of the coupler, the coupler stops transmitting torque, and the outer ring stops rotating under the action of the drawn foreign body. Because the power machine and the working machine can adopt the coupler, only the rotational inertia of the coupler is left after the clutch block is disengaged, the injury to the involved personnel or foreign matters is small, and the safety of the personnel and equipment can be protected to the greatest extent.
The foreign matter involved automatic disengaging type coupling can reduce the acting force by means of the free rotation of the free rolling body under the action of smaller foreign matter acting force, thereby avoiding causing personal injury and not influencing the normal work of the coupling; when the clutch block is under the action of a large foreign body force, the foreign body contact plate moves to drive the clutch block to be disengaged from the inner ring of the coupler, and power transmission is cut off, so that the protection purpose is realized, and personnel injury is avoided.
Drawings
Fig. 1 is a radial view of a foreign matter involving automatic disengaging type coupling according to a first embodiment of the present invention;
fig. 2 is a view of the automatic disengaging type coupling for foreign matter involved in the first embodiment of the present invention, taken along a-a direction of fig. 1;
fig. 3 is a radial view of the automatic disengaging type coupling in which foreign matters are involved according to the second embodiment of the present invention;
fig. 4 is a view of the automatic disengaging type coupling for foreign matter involved in the second embodiment of the present invention, taken along the direction B-B in fig. 1;
fig. 5 is a radial view of a foreign matter involved automatic disengaging type coupling according to the third embodiment of the present invention.
Reference numerals in the drawings indicate: 1-inner shaft end bearing 2-shaft coupling inner shaft end plate 3-coupling outer ring 4-foreign matter contact plate 401-first foreign matter contact part 402-second foreign matter contact part 5-gear 6-foreign matter contact plate connecting rack 7-elastic compression device 8-universal joint 9-support rod groove 10-sliding groove 11-sliding groove support 12-clutch block connecting rack 13-linkage rod 14-key 15-outer shaft end bearing 16-clutch block 17-coupling outer shaft end plate 18-limit sliding groove 19-support rod 20-transmission shaft 21-coupling inner ring 22-concentric sleeve 2201-first sleeve barrel 2202-second sleeve barrel 23-rolling mechanism 2301-first rolling bearing 2302-second rolling bearing 24- The rolling cylinder 25-the cylinder support rod 26-the cylinder axis.
Detailed Description
The following describes the foreign matter rolling-in automatic disengaging type coupling of the present invention in detail with reference to the accompanying drawings:
example one
As shown in fig. 1 and 2, the foreign matter rolling-in automatic disengaging type coupler of the embodiment includes a coupler inner ring 21, a clutch block 16, a coupler outer ring 3, a foreign matter contact plate 4 and a linkage mechanism, the coupler inner ring 21 is connected with a transmission shaft 20, a plurality of clutch blocks 16 capable of moving along the radial direction of the coupler inner ring 21 are arranged on the periphery of the coupler inner ring 21 along the circumferential direction, the outer side of each clutch block 16 is connected with the coupler outer ring, and the inner side of each clutch block 16 tightly holds/disengages the coupler inner ring 21; the periphery of the outer ring 3 of the coupler is circumferentially provided with a plurality of foreign matter contact plates 4, the foreign matter contact plates 4 are connected with the clutch block 16 through the linkage mechanism, the foreign matter contact plates 4 move under the pressure action of foreign matters and drive the clutch block 16 to be separated from the inner ring 21 of the coupler through the linkage structure, and the power transmission of the transmission shaft 20 is cut off.
The foreign matter is drawn into automatic disengaging shaft coupling of this embodiment realizes the power transmission between axle and the axle by two assembly connections, and two foreign matters are drawn into automatic disengaging shaft coupling's shaft coupling inner circle 21 respectively with two transmission shaft fixed connection, and the shaft coupling outer lane 3 fixed connection of two shaft couplings is in the same place again to connect two transmission shafts as an organic whole and realize power transmission.
In the embodiment, the clutch block 16 is additionally arranged between the coupler inner ring 21 and the coupler outer ring 3, the coupler keeps tightly holding between the clutch block 16 and the coupler inner ring 21 under the non-working condition, the non-installation condition and the normal working condition, and the clutch block 16 is simultaneously connected with the coupler outer ring 3, so that the synchronous action between the coupler inner ring 21 and the coupler outer ring 3 is ensured, and the power transmission is realized.
Further, in the present embodiment, a foreign matter contact plate 4 is disposed on the periphery of the coupling outer ring 3, the foreign matter contact plate 4 rotates synchronously with the coupling outer ring 3, the foreign matter contact plate 4 can move in a radial direction in a telescopic manner, and the foreign matter contact plate 4 is connected to the clutch block 16 through a linkage mechanism. When the coupler normally rotates, if foreign matters contact with or are involved in the coupler, the foreign matter contact plate 4 is forced inwards, the foreign matter contact plate 4 drives the rack to move centripetally after being forced, the clutch block 16 is driven by the linkage mechanism to move centrifugally, the clutch block 16 is separated from the inner ring 21 of the coupler, the coupler stops transmitting torque, and the outer ring 3 of the coupler stops rotating under the action of the involved foreign matters.
The linkage mechanism of the embodiment synchronously transmits the motion of the foreign matter contact plate 4 to the clutch block 16 to drive the clutch block 16 to move and disengage, so the linkage mechanism is only a transmission mechanism for realizing synchronous reverse motion of the foreign matter contact plate 4 and the clutch block 16. The linkage mechanism can be a connecting rod transmission mechanism, a gear transmission mechanism and the like.
Specifically, as a preferred implementation manner of this embodiment, the linkage mechanism described in this embodiment includes a clutch block connecting rack 12, a gear 5, and a foreign matter contact plate connecting rack 6, where the clutch block connecting rack 12 is constrained on the outer wall of the clutch block 16 through a chute, the foreign matter contact plate connecting rack 6 is constrained on the inner wall of the foreign matter contact plate 4 through a chute, and both the clutch block connecting rack 12 and the foreign matter contact plate connecting rack 6 are in meshing transmission with the gear 5; the foreign matter contact plate 4 and the foreign matter contact plate connecting rack 6 move centripetally under the pressure action of the foreign matter to drive the gear 5 to rotate, and simultaneously drive the clutch block connecting rack 12 to move centrifugally, the clutch block 16 is separated from the inner ring 21 of the coupler, and the power transmission of the transmission shaft 20 is cut off.
The linkage mechanism of the embodiment adopts a gear and rack mechanism, when the foreign matter contact plate 4 is subjected to the centripetal movement of the foreign matter pressure, the foreign matter contact plate connecting rack 6 moves downwards along with the foreign matter contact plate, the gear 5 meshed with the foreign matter contact plate is driven to rotate clockwise, the gear 5 drives the clutch block connecting rack 12 meshed with the gear to move upwards, and the clutch block connecting rack 12 drives the clutch block 16 to centrifuge and separate from the inner ring 21 of the coupler, so that the transmission of power is cut off. The linkage mechanism of the embodiment has a simple structure, effectively realizes synchronous reverse motion of the foreign matter contact plate 4 and the clutch block 16, ensures that the clutch block 16 is immediately disengaged when foreign matters exist, cuts off power transmission, and avoids casualties or equipment damage.
The embodiment further discloses a specific assembly mode of the linkage mechanism, specifically, the gear 5 is installed on the coupler outer ring 3 and is located between the coupler inner ring 21 and the coupler outer ring 3, an outer ring limiting sliding groove 18 is formed in the coupler outer ring 3, and one end of the foreign matter contact plate connected with the rack 6 extends into the coupler outer ring 3 through the outer ring limiting sliding groove 18 to be meshed with the gear. The outer ring limiting sliding groove 18 of the present embodiment can limit the foreign matter contact plate connecting rack 6 to be installed therein, so as to limit the foreign matter contact plate connecting rack 6 to only slide in the outer ring limiting sliding groove 18 in the radial direction, thereby ensuring effective meshing and synchronous action of the foreign matter contact plate connecting rack 6 and the gear 5.
Further, an elastic compression device 7 is disposed between the foreign matter contact plate 4 and the coupling outer ring 3 according to the present embodiment, and is used for keeping the clutch block 16 tightly held with the coupling inner ring 21 in the normal working/non-working state, so as to realize power transmission of the transmission shaft 20. The elastic compression device 7 of the embodiment is stored between the foreign matter contact plate 4 and the coupling outer ring 3 and is in a compression state, so that the foreign matter contact plate 4 is kept to extend outwards, the foreign matter contact plate is pulled to be connected with the rack 6 outwards, the gear 5 is meshed with the clutch block connecting rack 12 to ensure the cohesion between the clutch block 16 and the coupling inner ring 21, so as to ensure the transmission of the power of the transmission shaft 20, the clutch of the coupling is ensured, 16 has enough combination torque when the rotating machine is started, after the rotating machine is started, because the weight of the foreign matter contact plate 4 is larger than the clutch block 16, and the rotation radius of the foreign matter contact plate 4 is larger than the clutch block 16, the pressure of the clutch block 16 and the coupling inner ring 21 is larger when the rotating speed is higher, the combination is tighter, and.
Preferably, the elastic compression device 7 described in this embodiment is a compression spring, the compression spring is sleeved on the foreign matter contact plate connecting rack 6, and two ends of the compression spring are respectively connected to the coupling outer ring 3 and the foreign matter contact plate 4.
As a preferred embodiment of this embodiment, the clutch blocks 16 and the foreign matter contact plates 4 described in this embodiment are in one-to-one correspondence, each pair of clutch blocks 16 and the foreign matter contact plates 4 which are oppositely arranged are respectively connected through a linkage mechanism, the linkage mechanisms are connected through a synchronization structure, after any foreign matter contact plate acts, all the linkage mechanisms act synchronously under the driving of the synchronization mechanism, all the clutch blocks 16 disengage from the inner race of the coupling, and the power transmission of the transmission shaft 20 is cut off.
The clutch block 16 of this embodiment is generally provided with a plurality of, evenly distributed on the whole circumference of whole shaft coupling inner race 21, like this, the cohesion between clutch block 16 and the shaft coupling inner race 21 is more even, and power transmission is more stable. Like this, the embodiment that corresponds with it also sets up a plurality of foreign matter contact plates 4 in the periphery of shaft coupling outer lane 3, evenly distributed on whole circumference of whole shaft coupling outer lane 3, and each foreign matter contact plate 4 corresponds a clutch piece 16, and like this, arbitrary foreign matter contact plate 4 receives the effect of foreign matter pressure, and corresponding clutch piece 16 can both break away. In the embodiment, each linkage mechanism is further connected through a synchronization device, so that any foreign matter contact plate 4 is under the action of foreign matter pressure, the linkage mechanisms act simultaneously under the driving of the synchronization mechanisms, all clutch blocks 16 are separated from the inner ring 21 of the coupler, the transmission of the power of the transmission shaft 20 is completely cut off, and the reliability and the safety are improved.
As shown in fig. 2, the clutch piece 16 of the present embodiment includes four arc-shaped clutch pieces distributed along the circumferential direction of the outer periphery of the inner race 21 of the coupling, and the foreign matter contact plate 4 of the present embodiment includes four arc-shaped clutch pieces distributed along the circumferential direction of the outer race 3 of the coupling.
Further, the synchronizing mechanism of the embodiment includes a universal joint 8, a linkage rod 13 and a support rod 19, two adjacent gears 5 are respectively connected with two ends of the same linkage rod 13 through the universal joint 8, one end of the support rod 19 is fixed on the inner wall of the outer ring 3 of the coupler, and the other end is provided with a support rod groove 9; the middle part of the linkage rod 13 is limited and supported in the supporting rod groove 9, and the linkage rod 13 is limited to roll or slide in a limited range.
The universal joint is a machine part for realizing variable-angle power transmission and is used for changing the position of a transmission axis direction.
The foreign matter involving automatic disengaging type coupling of this embodiment still includes the sliding tray support 11 of being connected with the inner wall of coupling outer lane 3 or being connected with bracing piece 19, separation and reunion piece connect rack 12 spacing install in sliding tray 10 of sliding tray support 11, inject the slip direction of separation and reunion piece connection rack 12.
In the embodiment, the inner ring 21 of the coupler is in interference fit or key connection with the transmission shaft 20; the clutch piece 16 is connected with the coupling inner ring 21 through a friction plate or a locking plate. The coupling inner ring 21 and the transmission shaft 20 of the embodiment are fixedly connected through the key 14.
In this embodiment, the shaft end of the coupling outer ring 3 is fixedly mounted with a shaft end plate for limiting the radial and axial positions of the coupling outer ring 3, and a shaft end bearing is mounted between the shaft end plate and the transmission shaft 20. The two ends of the coupling outer ring 3 of the embodiment are respectively provided with a coupling inner shaft end plate 2 and a coupling outer shaft end plate 17, an inner shaft end bearing 1 is arranged between the coupling outer ring 3 inner shaft end and the transmission shaft 20, and an outer shaft end bearing 15 is arranged between the coupling outer shaft end plate 17 and the transmission shaft 20.
Example two
The embodiment is further improved on the basis of the first embodiment, and specifically:
as shown in fig. 3 and 4, the foreign matter rolling-in automatic disengaging type coupler of the embodiment includes a coupler inner ring 21, a clutch block 16, a coupler outer ring 3, a foreign matter contact plate 4, a linkage mechanism and a free rolling body, wherein the coupler inner ring 21 is connected with a transmission shaft 20, a plurality of clutch blocks 16 capable of moving along the radial direction of the coupler inner ring 21 are arranged on the periphery of the coupler inner ring 21 along the circumferential direction, the outer side of each clutch block 16 is connected with the coupler outer ring, and the inner side of each clutch block 16 tightly holds/disengages the coupler inner ring 21; a plurality of foreign matter contact plates 4 are arranged on the periphery of the outer ring 3 of the coupler along the circumferential direction, the foreign matter contact plates 4 are connected with the clutch block 16 through a linkage mechanism, the foreign matter contact plates 4 move under the pressure action of foreign matters and drive the clutch block 16 to be separated from the inner ring 21 of the coupler through the linkage mechanism, and the power transmission of the transmission shaft 20 is cut off; the free rolling body is freely rotatably mounted on the periphery of the foreign matter contact plate.
In a preferred embodiment of the present invention, the free rolling element is a concentric sleeve 22 that is sleeved on the outer periphery of the foreign matter contact plate and can rotate freely relative to the foreign matter contact plate.
The foreign matter of this embodiment is drawn into automatic disengaging shaft coupling and establishes the concentric sleeve 22 that can free rotation in the periphery cover of foreign matter contact plate 4, can effectually turn into the rolling frictional force with the sliding friction force of foreign matter contact, and the frictional force size between foreign matter and shaft coupling (concentric sleeve) equals to maintain concentric sleeve pivoted power under this kind of state promptly, will reduce the radial frictional force between shaft coupling and foreign matter greatly, reduces the damage to shaft coupling and foreign matter.
The foreign matter involved automatic disengaging type coupler of the embodiment can reduce the acting force by means of free rotation of the concentric sleeve under the action of a small foreign matter acting force, thereby avoiding causing injury to personnel and not influencing the normal work of the coupler; when the clutch block is under the action of a large foreign body force, the foreign body contact plate moves to drive the clutch block to be disengaged from the inner ring of the coupler, and power transmission is cut off, so that the protection purpose is realized, and personnel injury is avoided.
In order to realize the free rotation of the concentric sleeve 22 of the present embodiment, which is sleeved on the foreign matter contact plate 4, a rolling mechanism 23 is disposed between the concentric sleeve and the foreign matter contact plate, so that the concentric sleeve 22 can rotate freely relative to the foreign matter contact plate 4.
In an embodiment of the present invention, the rolling mechanism 23 is a bearing, the foreign matter contact plate 4 is in interference fit with an inner ring of the bearing, and an outer ring of the bearing is in interference fit with the concentric sleeve 22.
Further, the bearings according to the present embodiment include a plurality of bearings, which are respectively distributed along the axial direction of the foreign matter contact plate 4. In this way, the rotation of the concentric sleeve 22 is more balanced, and the contact plate 4 is prevented from being unstable due to the rotation deviation.
Specifically, the foreign matter contact plate 4 according to the present embodiment includes a first foreign matter contact portion 401 correspondingly disposed on the outer periphery of the coupling inner ring 21 and a second foreign matter contact portion 402 correspondingly disposed on the outer periphery of the coupling outer ring 3; a first rolling bearing 2301 is provided between the first foreign matter contact portion 401 and the concentric sleeve 22, and a second rolling bearing 2302 is provided between the second foreign matter contact portion 402 and the concentric sleeve 22.
Further, in the present embodiment, the outer diameter of the coupling inner ring 21 is smaller than the outer diameter of the coupling outer ring 3, the inner diameter of the first foreign object contact portion 401 is smaller than the inner diameter of the second foreign object contact portion 402, the concentric sleeve 22 includes a first sleeve portion 2201 matched with the first foreign object contact portion 401 and a second sleeve portion 2202 matched with the second foreign object contact portion 402, and the inner diameter of the first sleeve portion 2201 is smaller than the inner diameter of the second sleeve portion 2202.
As another embodiment of this embodiment, the rolling mechanism in this embodiment is a ball, an arc-shaped groove with two closed ends is formed on the outer peripheral wall of the foreign matter contact plate 4, the ball is limited in the arc-shaped groove and can rotate freely, and the ball is in contact with the foreign matter contact plate 4 and the concentric sleeve 22 respectively.
The concentric sleeve 22 in this embodiment is an elastic sleeve made of an elastic material and having a soft outer surface; alternatively, a soft-surfaced elastomeric covering is provided on the outer surface of the concentric sleeve 22.
As a preferred embodiment of this embodiment, the concentric sleeve 22 is detachably mounted with a sleeve rotation control lever for controlling free rotation/standstill thereof. Whether the sleeve rotating control rod is installed or not is considered according to actual needs, namely the sleeve rotating control rod is directly connected with the stable foundation, so that the concentric sleeve 22 of the coupler can be in a rolling or static state, and the injury to contact personnel or objects is further reduced.
In the embodiment, the concentric sleeve 22 is sleeved on the periphery of the foreign matter contact plate 4 of the coupler, and the concentric sleeve 22 can freely rotate around the cylinder rolling shaft and is constrained by the cylinder rolling shaft in all directions except the circumferential rolling direction. The concentric sleeve 22 is in frictional contact with the foreign matter contact plate 4 of the coupler through a plurality of rolling bearings, namely, a tightening force exists between the foreign matter contact plate 4 of the coupler and the inner ring of the rolling bearing, and the generated frictional force ensures that the concentric sleeve 22 is restricted by movement in all directions except coaxial rotation in the normal working state of the coupler. The number of the rolling bearings can be adjusted according to the actual use condition of the coupler.
When the coupler normally rotates, if foreign matters contact the coupler, radial friction force generated by the coupler and contact objects is converted into friction force of the concentric sleeve 22, sliding friction force of the coupler and the contact objects is converted into rolling friction force between the concentric sleeve 22 and the foreign matter contact plate 4, namely the friction force between the contact objects and the coupler in the state is equal to force for maintaining relative rotation between the foreign matter contact plate 4 and the concentric sleeve 22, and the radial friction force between the coupler and the contact objects is greatly reduced.
Further, if the contact force of the foreign matters is large or the foreign matters are rolled into the coupler, the foreign matter contact plate 4 is forced to the inside, the foreign matter contact plate 4 is driven to be connected with the rack to generate centripetal motion after being subjected to the force, the internal gear is driven to rotate, the clutch block is driven to be connected with the rack to generate centrifugal motion at the same time, the clutch block is separated from the inner ring of the coupler, the coupler stops transmitting torque, the outer ring of the coupler stops rotating under the action of the rolled foreign matters, and because the power machine and the working machine can adopt the coupler, only the rotational inertia of the coupler is remained after the clutch block is separated, the injury and the tiny damage to the rolled personnel or the foreign matters are realized, and.
In addition, the concentric sleeve 22 shields the outer periphery of the coupling, and the concentric sleeve 22 shields the projections such as bolts and contact claws which exist in the coupling itself, thereby making it difficult to catch the contact object and providing a protective effect for the contact person and the object.
The gear, the rack, the foreign matter contact plate, the support and the restraint of this embodiment shaft coupling, the quantity, the arrangement mode, the type of clutch piece all can be changed, adjusted according to actual need.
EXAMPLE III
The embodiment is further improved on the basis of the first embodiment, and specifically:
as shown in fig. 5, the foreign matter entanglement automatic disengaging type coupler of the embodiment includes a coupler inner ring 21, a clutch block 16, a coupler outer ring 3, a foreign matter contact plate 4, a linkage mechanism and a free rolling body, the coupler inner ring 21 is connected with a transmission shaft 20, a plurality of clutch blocks 16 capable of moving along the radial direction of the coupler inner ring 21 are arranged on the periphery of the coupler inner ring 21 along the circumferential direction, the outer side of each clutch block 16 is connected with the coupler outer ring, and the inner side of each clutch block 16 clasps/disengages the coupler inner ring 21; a plurality of foreign matter contact plates 4 are arranged on the periphery of the outer ring 3 of the coupler along the circumferential direction, the foreign matter contact plates 4 are connected with the clutch block 16 through a linkage mechanism, the foreign matter contact plates 4 move under the pressure action of foreign matters and drive the clutch block 16 to be separated from the inner ring 21 of the coupler through the linkage mechanism, and the power transmission of the transmission shaft 20 is cut off; the free rolling body is freely rotatably mounted on the periphery of the foreign matter contact plate.
The free rolling bodies of the embodiment are a plurality of rolling cylinder bodies 24 distributed along the circumferential direction of the outer surface of the foreign matter contact plate, and the central axis of each rolling cylinder body 24 is arranged in parallel with the central axis of the coupling.
When the foreign matter contacts the coupler, the sliding friction force between the foreign matter and the coupler causes the rolling cylinder 1 to rotate freely, and the sliding friction force is converted into the rolling friction force to reduce the radial acting force on the coupler and the foreign matter.
The foreign matter rolling-in automatic disengaging type coupling is provided with the rolling cylinder 24 which can rotate freely at the periphery of the foreign matter contact plate 4, so that the sliding friction force contacted by the foreign matter can be effectively converted into the rolling friction force, namely, the friction force between the foreign matter and the coupling (the rolling cylinder 24) is equal to the force for maintaining the rotation of the rolling cylinder 24 in the state, the radial friction force between the coupling and the foreign matter is greatly reduced, and the damage to the coupling and the foreign matter is reduced.
The foreign matter rolling-in automatic disengaging type coupling of the embodiment can reduce the acting force by means of the free rotation of the rolling cylinder 24 under the action of a small foreign matter acting force, so that the injury of personnel is avoided, and the normal work of the coupling is not influenced; when the clutch block is subjected to a large foreign body acting force, the foreign body contact plate 4 moves to drive the clutch block to be disengaged from the inner ring of the coupler, and power transmission is cut off, so that the protection purpose is realized, and personnel injury is avoided.
As a preferred embodiment of the present invention, the automatic disengaging coupling for rolling in foreign matters of the present embodiment further comprises a supporting structure fixed on the outer wall of the foreign matter contacting plate 4, and the rolling cylinder 24 is rotatably mounted on the supporting structure.
Specifically, one implementation of the supporting structure of the present embodiment is: the supporting structure comprises a cylinder supporting rod 25 and a cylinder shaft 26, one end of the cylinder supporting rod 25 is fixed on the outer wall of the foreign matter contact plate 4, and the other end of the cylinder supporting rod is connected with the cylinder shaft 26; the cylinder shaft 26 is arranged in parallel with the central axis of the coupler; the rolling cylinder 24 is rotatably mounted on a cylinder shaft 26.
Another embodiment of the support structure of this embodiment is: the supporting structure comprises a cylinder supporting rod 25 and a cylinder shaft 26, one end of the cylinder supporting rod 25 is fixed on the outer wall of the foreign matter contact plate 4, and the other end of the cylinder supporting rod is connected with the cylinder shaft 26; the cylinder shaft 26 is arranged in parallel with the central axis of the coupler; the cylinder shaft 26 is connected with the cylinder support rod 25 in a free rotating way, and the rolling cylinder 24 is fixedly arranged on the cylinder shaft 26.
Further, the foreign matter contact plate 4 according to the present embodiment includes a first foreign matter contact portion 401 correspondingly disposed on the outer periphery of the coupling inner ring 21 and a second foreign matter contact portion 402 correspondingly disposed on the outer periphery of the coupling outer ring 3; the cylinder support rod 25 is fixed to an outer wall of the first foreign material contact portion 401 or the second foreign material contact portion 402.
Specifically, in the present embodiment, one end of the cylinder support rod 25 is fixed to the outer wall of the first foreign matter contact portion 401 at the end close to the second foreign matter contact portion 402, and the other end of the cylinder support rod 25 is connected to the middle of the cylinder shaft 26; the rolling cylinder 24 includes a first cylinder and a second cylinder respectively mounted on cylinder shafts 26 at both sides of a cylinder support rod 25.
Further, in the present embodiment, the outer diameter of the coupling inner ring 21 is smaller than the outer diameter of the coupling outer ring 3, and the inner diameter of the first foreign object contact portion 401 is smaller than the inner diameter of the second foreign object contact portion 402; the height of the cylinder support rod 25 is larger than the outer diameter of the second foreign matter contact part 402; the first cylinder is arranged on the outer ring of the first foreign matter contact part 401, and the second cylinder is correspondingly arranged on the outer ring of the second foreign matter contact part 402.
The rolling cylinders 24 described in the embodiment include a plurality of rolling cylinders which are respectively distributed along the circumferential direction of the outer surface of the foreign matter contact plate 4, so that the whole circumferential outer surface of the foreign matter contact plate 4 is covered by the rolling cylinders 1, and the foreign matter can be effectively prevented from directly contacting the coupling body regardless of the volume of the foreign matter, thereby realizing the foreign matter prevention effect of the coupling of the invention.
Meanwhile, the support structures of the present invention correspond to the rolling cylinders 24 one by one, and each rolling cylinder 24 is rotatably mounted on the outer wall of the foreign material contact plate 4 through a support mechanism.
As a preferred embodiment of this embodiment, the rolling cylinder 24 is an elastic rolling cylinder made of an elastic material and having a soft outer surface; alternatively, an elastic body with a soft surface is provided on the outer surface of the rolling cylinder 24.
The foreign matter contact baffle 4 of the shaft coupling of the embodiment is provided with a circle of rolling cylinders 24 in the circumferential direction, and the rolling cylinders 24 can freely rotate around the cylinder shaft 26 and are restrained by the cylinder shaft 26 in all directions except the circumferential rolling direction. The cylinder shaft 26 is connected to the foreign matter contact plate 4 of the coupling through the cylinder support rod 25, and the connection mode can adopt a thread mode, a bolt connection mode and the like. The number of the rolling cylinders 24 can be adjusted according to the actual use condition of the coupler, and the material of the rolling cylinders 24 can be selected according to the actual condition on site.
When the coupler normally rotates, if foreign matters contact with the coupler, radial friction is inevitably generated between the coupler and contacted objects due to the fact that the coupler is in a high-speed rotating state, and in addition, due to the fact that protruding objects such as bolts and contact claws exist in the coupler, personnel or foreign matters are easily drawn into the coupler, and casualties and equipment damage are caused.
The outer ring of the coupler of the embodiment is additionally provided with a circle of rotatable rolling cylinders 24, the radial friction force generated by the coupler and the contact object can cause the rolling cylinders 24 to rotate, the sliding friction force of the coupler and the contact object is converted into the rolling friction force between the rolling cylinders 24 and the contact object, namely, the friction force between the contact object and the coupler (the rolling cylinders 24) is equal to the force for maintaining the rolling cylinders 24 to rotate in the state, and the radial friction force between the coupler and the contact object can be greatly reduced.
If the contact force between the contact object and the shaft coupling is large and exceeds the protection capability of the external rolling cylinder 24, the foreign matter contact plate 4 is subjected to an internal force, the foreign matter contact plate 4 is driven to be connected with the rack to generate centripetal motion after being subjected to the force, the internal gear is driven to rotate, the clutch block is driven to be connected with the rack to generate centrifugal motion, the clutch block is separated from the inner ring of the shaft coupling, the shaft coupling stops transmitting torque, and the outer ring stops rotating under the action of being drawn into the foreign matter. Because the power machine and the working machine can adopt the coupler, only the rotational inertia of the coupler is left after the clutch block is disengaged, the injury to the involved personnel or foreign matters is small, and the safety of the personnel and equipment can be protected to the greatest extent.
The gear, the rack, the foreign body contact outer ring plate, the support and the restraint, and the number, the arrangement mode and the type of the clutch blocks of the coupler can be replaced and adjusted according to actual needs.
Due to the shielding effect of the rolling cylinder 24 on the periphery of the coupler, the protrusions such as bolts, contact claws and the like existing in the coupler are difficult to hook contact objects due to the shielding effect of the cylinder on the outer part, and the protection effect is formed on contact personnel and the objects.
The above-described embodiments of the present invention can be implemented individually or in combination with each other.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The foreign matter is rolled into the automatic disengaging type shaft coupling, wherein, including inner race of the shaft coupling, clutch block, outer race of the shaft coupling, foreign matter contact plate, link gear and free rolling element, the said inner race of the shaft coupling is connected with drive shaft, the periphery of inner race of the shaft coupling sets up a plurality of clutch blocks that can move along its radial direction along the circumference, the outside of the clutch block is connected with outer race of the shaft coupling, the inboard of the clutch block holds/disengages the inner race of the shaft coupling tightly; a plurality of foreign matter contact plates are arranged on the periphery of the outer ring of the coupler along the circumferential direction and are connected with the clutch block through a linkage mechanism, the foreign matter contact plates move under the pressure action of foreign matters and drive the clutch block to be separated from the inner ring of the coupler through the linkage mechanism, and the power transmission of the transmission shaft is cut off; the free rolling body can be freely rotatably arranged on the periphery of the foreign matter contact plate;
and a shaft end plate used for limiting the radial and axial positions of the outer ring of the coupler is fixedly arranged at the shaft end of the outer ring of the coupler, and a shaft end bearing is arranged between the shaft end plate of the coupler and the transmission shaft.
2. A foreign matter rolling-in automatic disengaging type coupling according to claim 1, wherein the free rolling body is a concentric sleeve fitted over the outer periphery of the foreign matter contact plate and freely rotatable relative thereto.
3. A foreign matter rolling-in automatic disengaging type coupling according to claim 2, wherein a rolling mechanism is provided between the concentric sleeve and the foreign matter contacting plate so that the concentric sleeve can freely rotate with respect to the foreign matter contacting plate.
4. A foreign matter rolling-in automatic disengaging type coupling according to claim 3, wherein the rolling mechanism is a bearing, the foreign matter contact plate is in interference fit with an inner ring of a rolling bearing, and an outer ring of the bearing is in interference fit with a concentric sleeve.
5. A foreign matter rolling-in automatic disengaging type coupling according to claim 3, wherein the rolling mechanism is a ball, an arc-shaped groove with both ends closed is formed on the outer peripheral wall of the foreign matter contact plate, the ball is limited in the arc-shaped groove and can rotate freely, and the ball is in contact with the foreign matter contact plate and the concentric sleeve respectively.
6. A foreign matter rolling-in automatic disengaging type coupling according to claim 1, wherein said free rolling bodies are a plurality of rolling cylinders circumferentially distributed along an outer surface of the foreign matter contacting plate, and a central axis of each rolling cylinder is arranged in parallel with a central axis of the coupling.
7. A foreign matter rolling-in automatic disengaging type coupling according to claim 6, further comprising a support structure fixed to an outer wall of the foreign matter contacting plate, wherein said rolling cylinder is rotatably mounted on the support structure.
8. A foreign matter rolling-in automatic disengaging type coupling according to claim 7, wherein the supporting structure comprises a cylinder supporting rod and a cylinder shaft, one end of the cylinder supporting rod is fixed on the outer wall of the foreign matter contacting plate, and the other end is connected with the cylinder shaft; the cylinder shaft is arranged in parallel with the central axis of the coupler; the rolling cylinder body is rotatably arranged on the cylinder body shaft.
9. A foreign matter rolling-in automatic disengaging type coupling according to claim 7, wherein the supporting structure comprises a cylinder supporting rod and a cylinder shaft, one end of the cylinder supporting rod is fixed on the outer wall of the foreign matter contacting plate, and the other end is connected with the cylinder shaft; the cylinder shaft is arranged in parallel with the central axis of the coupler; the drum body shaft is connected with the drum body supporting rod in a free rotating mode, and the rolling drum body is fixedly installed on the drum body shaft.
10. A foreign matter rolling-in automatic disengaging type coupling according to claim 1, wherein said free rolling body is an elastic rolling cylinder made of an elastic material and having a soft outer surface; or, an elastic body with a soft surface is arranged on the outer surface of the free rolling body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710422757.3A CN107448491B (en) | 2017-06-07 | 2017-06-07 | Automatic disengaging type coupling for rolling-in foreign matter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710422757.3A CN107448491B (en) | 2017-06-07 | 2017-06-07 | Automatic disengaging type coupling for rolling-in foreign matter |
Publications (2)
| Publication Number | Publication Date |
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| CN107448491A CN107448491A (en) | 2017-12-08 |
| CN107448491B true CN107448491B (en) | 2020-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710422757.3A Active CN107448491B (en) | 2017-06-07 | 2017-06-07 | Automatic disengaging type coupling for rolling-in foreign matter |
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| CN (1) | CN107448491B (en) |
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|---|---|---|---|---|
| CN2208028Y (en) * | 1992-10-19 | 1995-09-20 | 杨益文 | Internal braking winding engine |
| EP0463271B1 (en) * | 1990-06-25 | 1997-01-08 | Beloit Technologies, Inc. | Shear hub |
| JP2004036890A (en) * | 2002-07-12 | 2004-02-05 | Halla Climate Control Corp | Power transmission |
| CN200950238Y (en) * | 2006-09-04 | 2007-09-19 | 盐城市机床有限公司 | Disengaging safety hand wheel |
| CN101929509A (en) * | 2009-06-26 | 2010-12-29 | 江苏省徐州锻压机床厂集团有限公司 | Coupler with over-torsion protection function |
| CN202790190U (en) * | 2012-07-05 | 2013-03-13 | 鞍钢股份有限公司 | Novel single-tooth roller tooth-shaped coupling |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6248773B2 (en) * | 2014-04-17 | 2017-12-20 | 株式会社デンソー | Power transmission device |
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2017
- 2017-06-07 CN CN201710422757.3A patent/CN107448491B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0463271B1 (en) * | 1990-06-25 | 1997-01-08 | Beloit Technologies, Inc. | Shear hub |
| CN2208028Y (en) * | 1992-10-19 | 1995-09-20 | 杨益文 | Internal braking winding engine |
| JP2004036890A (en) * | 2002-07-12 | 2004-02-05 | Halla Climate Control Corp | Power transmission |
| CN200950238Y (en) * | 2006-09-04 | 2007-09-19 | 盐城市机床有限公司 | Disengaging safety hand wheel |
| CN101929509A (en) * | 2009-06-26 | 2010-12-29 | 江苏省徐州锻压机床厂集团有限公司 | Coupler with over-torsion protection function |
| CN202790190U (en) * | 2012-07-05 | 2013-03-13 | 鞍钢股份有限公司 | Novel single-tooth roller tooth-shaped coupling |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107448491A (en) | 2017-12-08 |
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