CN214527845U

CN214527845U - Protection device and lifting machine

Info

Publication number: CN214527845U
Application number: CN202120861419.1U
Authority: CN
Inventors: 江伟能
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-25
Filing date: 2021-04-25
Publication date: 2021-10-29
Anticipated expiration: 2031-04-25

Abstract

The utility model discloses a protection device and lifting machine, wherein, protection device includes detector and trigger, and the detector has first switch, and first switch has first state and second state, and one of first state and second state is the switch off-state, and the other is the switch on-state, and the detector stops the motor of lifting machine when first switch is in the second state; the trigger comprises a trigger piece, the trigger piece is connected with the first switch, the trigger piece is provided with a first position for triggering the first switch to be in a first state and a second position for triggering the first switch to be in a second state, the trigger piece is used for pressing a rope of the elevator and can have a trend of moving to the first position under the pushing force of the rope, and the trigger piece also has a trend of moving to the second position under the driving force; when the driving force is larger than the pushing force, the trigger piece can move to the second position to trigger the first switch to be in the second state. The utility model discloses technical scheme has improved the safety in utilization of lifting machine.

Description

Protection device and lifting machine

Technical Field

The utility model relates to a lifting machine transportation technical field, in particular to protection device and lifting machine.

Background

The hoist is mechanical equipment for transportation by changing potential energy, such as a mine hoist, a dam-crossing hoist and the like. Broadly, elevators, overhead cranes, winches, stabilizers, cranes, hoist hoists, etc. may be referred to as hoists.

The common hoister drives a rope to pay off or take up through the rotation of a motor, and then drives goods to move up and down. In the paying-off process, if the goods do not reach the preset position, and the movement of the bearing platform for bearing the goods is blocked or the rope is pulled, the rope can be stacked together due to the action that the motor continuously rotates to release the rope, the rope is easily wound, and in other words, the use safety of the hoister in the prior art is not high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a protection device aims at solving the technical problem that the safety in utilization of prior art's lifting machine is low excessively.

In order to achieve the above object, the present invention provides a protection device, including a detector and a trigger, wherein the detector has a first switch, the first switch has a first state and a second state, one of the first state and the second state is a switch open state, and the other is a switch closed state, and the detector is configured to stop a motor of a hoist when the first switch is in the second state; and

the trigger comprises a trigger piece, the trigger piece is connected with the first switch, the trigger piece is provided with a first position for triggering the first switch to be in a first state and a second position for triggering the first switch to be in a second state, the trigger piece is used for pressing against a rope of the elevator and can have a trend of moving to the first position under the resisting and pushing force of the rope, and the trigger piece is also provided with a trend of moving to the second position under the driving force; wherein,

when the driving force is larger than the pushing force, the trigger piece can move to a second position to trigger the first switch to be in a second state.

Optionally, the second state is a switch off state, and the first switch is a normally open switch.

Optionally, the trigger further comprises a drive member for applying the driving force to the trigger member to cause the trigger member to have a tendency to move towards the second position.

Optionally, the driving member is an elastic member.

Optionally, the trigger further includes a connecting member, two ends of the connecting member are respectively connected to the first switch and the trigger member, and the connecting member is configured to trigger the first switch to enter the first state when the trigger member is located at the first position, and trigger the first switch to enter the second state when the trigger member is located at the second position.

Optionally, the connecting member is an elastic member.

Optionally, the triggering member includes a movable plate and a follower wheel, the movable plate is connected to the driving member and the connecting member at the same time, and the follower wheel is rotatably disposed on the movable plate and can be used for pressing against a rope of the hoist;

when the movable plate is assembled with the lifter, the movable plate can be rotatably arranged on the lifter and can rotate along with the change of the magnitude relation between the pushing force and the driving force so as to drive the connecting piece to change the state of the first switch.

Optionally, the triggering part further comprises a retaining ring, and the retaining ring and the wheel body of the follower wheel jointly enclose to form a fastening hole for a rope to pass through.

Optionally, the detector further includes a second switch, the second switch is configured to stop the motor of the hoist when the plummer of the hoist moves to the preset loading position, and the second switch is connected in series with the first switch in the detection circuit of the detector.

The utility model discloses still provide a lifting machine, including motor, rope, plummer and protection device, this protection device includes:

a detector having a first switch, the detector for stopping a motor of a hoist when the first switch is closed; and

the trigger comprises a trigger piece, the trigger piece is connected with the first switch, the trigger piece is provided with a first position for triggering the first switch to be switched off and a second position for triggering the first switch to be switched on, the trigger piece is used for abutting against a rope of the elevator, the trigger piece has a tendency of moving to the first position under the action of the abutting force of the rope, and the trigger piece also has a tendency of moving to the second position under the action of a driving force; wherein,

the trigger piece is used for moving to a second position to trigger the first switch to be closed when the driving force is larger than the pushing force.

The motor is in driving connection with the bearing table through the rope, and the rope can be abutted against the trigger piece of the protection device.

Optionally, the protection device further comprises a console, the console is provided with a lifting switch, and the lifting switch is electrically connected with the motor.

The protection device of the technical scheme of the utility model assembles the trigger part and the rope of the elevator, when the rope is in a tightening state, the trigger part has a trend of moving to the first position based on the thrust force of the rope to the trigger part, then, the trigger part is applied with a driving force which is mutually confronted with the thrust force (the driving force can be the gravity of the trigger part or the force applied to the trigger part by other structures), based on the driving force, the trigger part has a trend of moving to the second position, finally, the trigger part triggers the first switch to be in the second state on the second position, so as to start the detector to stop the motor of the elevator, namely, when the thrust force is greater than the driving force (namely, when the rope is in the tightening state), the trigger part moves to the first position, the first switch is in the first state, the motor can normally operate, when the thrust force is less than the driving force (namely, when the rope is in a loosening state), the trigger piece moves to the second position, the first switch is in the second state, and the motor of the lifting machine is stopped. Like this, when the plummer removal of bearing the weight of the goods was obstructed or the rope was dragged and is led to the rope to become lax, the motor can be stopped by timely system, and the effectual winding phenomenon of rope emergence of having avoided. Therefore, the protection device of the application can improve the use safety of the hoister in the prior art.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of the elevator of the present invention.

The reference numbers illustrate:

1. a protection device; 11. a detector; 12. a trigger; 121. a trigger; 121a, a movable plate; 121b, a follower wheel; 121c, a retaining ring; 121d, buckling holes; 122. a drive member; 123. a connecting member; 2. a motor; 3. a rope; 4. a bearing table; 5. a console; 51. a lifting switch; 511. a forward rotation key; 512. a reverse key; 52. emergency stop button

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a protection device 1 is applied to the lifting machine.

The hoist may be any one of mechanical devices such as a mine hoist, a dam-crossing hoist, an elevator, a crown block, a winch, a stable car, a crane, a hoist, and the like.

Particularly, as shown in fig. 1, the lifting machine includes motor 2, rope 3, plummer 4, protection device 1 and controller, the controller is connected with motor 2 electricity, the controller is used for opening and closing of control motor 2, the one end of rope 3 links to each other with the output shaft of motor 2, the other end links to each other with plummer 4, plummer 4 is used for holding the goods, the receipts line or the unwrapping wire of motor 2 accessible corotation or reversal control rope 3, so, drive plummer 4 and the goods on the plummer 4 and reciprocate.

Optionally, the protection device 1 further comprises a console 5, the console 5 is provided with a lifting switch 51, and the lifting switch 51 is electrically connected with the motor 2. It can be understood, control cabinet 5 is used for supplying the user to input different control command to the controller, be favorable to user's use experience, it is specific, lifting switch 51 includes corotation button 511 and reversal button 512, corotation button 511 is used for sending corotation signal to the controller after being pressed by the user, the controller is controlling motor 2 corotation when receiving corotation signal, reversal button 512 is used for inputting reversal signal to the controller after being pressed by the user, the controller is controlling motor 2 reversal when receiving reversal signal, furthermore, control cabinet 5 still is equipped with emergency control stop button 52, be used for sending emergency control stop signal to the controller after being pressed by the user, the controller closes motor 2 after receiving emergency control stop signal.

In the embodiment of the present invention, as shown in fig. 1, the protection device 1 includes a detector 11 and a trigger 12, the detector 11 has a first switch, the first switch has a first state and a second state, one of the first state and the second state is a switch open state, and the other is a switch closed state, the detector 11 is used for stopping the motor 2 of the elevator when the first switch is in the second state; and

the trigger 12 includes a trigger 121, the trigger 121 is connected with the first switch, the trigger 121 has a first position for triggering the first switch to be in a first state and a second position for triggering the first switch to be in a second state, the trigger 121 is used for pressing against the rope 3 of the hoist, and can have a tendency to move to the first position by the pushing force of the rope 3, the trigger 121 also has a tendency to move to the second position by a driving force; wherein,

when the driving force is greater than the pushing force, the triggering member 121 may move to the second position to trigger the first switch to be in the second state.

Specifically, the protection device 1 includes a detector 11, the detector 11 has a first switch having two states, namely a first state and a second state, and when the first switch is in the second state, the detector 11 is used for stopping the motor 2 of the elevator; in some embodiments, when the first switch is in the first state, the first switch is closed, when the first switch is in the second state, the first switch is open, and when the first switch is in the second state (i.e., open), the circuit of the motor 2 is also open, and the motor 2 is closed; in other embodiments, the first switch is open when the first switch is in the first state, closed when the first switch is in the second state, and the detector 11 is configured to send a braking signal to the controller to brake the motor 2 when the first switch is in the second state (i.e., closed).

Further, the trigger 12 is used for triggering the first switch to be opened or closed, and when the trigger 12 is at the first position, the first switch is triggered to enter the first state, and when the trigger 12 is at the second position, the first switch is triggered to enter the second state. Specifically, the trigger 12 includes a trigger 121 abutting against the rope 3 (it should be noted here that, after abutting against the trigger 121, the rope 3 can slide compared to the trigger 121 to drive the plummer 4 to move up and down), the trigger 121 receives two forces after abutting against the rope 3, one of which is a pushing force of the rope 3 against the trigger 121, under which the trigger 121 has a tendency to move to the first position, and the other is a driving force, under which the trigger 121 has a tendency to move to the second position, and it is worth mentioning that the driving force can be a gravity of the trigger 121 itself, a gravity of a weight added on the driving member 122, or a driving force (such as an elastic force of a spring, a magnetic force of a magnet) applied by the driving member 122 to the trigger 121.

When the pushing force is greater than the driving force, the trigger 121 moves to the first position, when the trigger 121 moves to the first position, the first switch is triggered to enter the first state, the motor 2 can normally operate, when the driving force is greater than the pushing force, the trigger 121 moves to the second position, and when the trigger 121 moves to the second position, the first switch is triggered to enter the second state to stop the motor 2.

It should be noted that the pushing force varies with the tightening degree of the rope 3, that is, when the rope 3 in a tightened state is abutted to the trigger 121, at this time, the pushing force exerted on the trigger 121 is greater than the driving force, the trigger 121 moves to the first position, and the motor 2 operates normally; along with the gradual slackening of the rope 3, the pushing force of the rope 3 to the trigger 121 is gradually weakened until the pushing force applied to the trigger 121 is smaller than the driving force, the trigger 121 moves from the second position on the first position, and when the trigger 121 moves to the second position, the motor 2 is turned off. Among these things, the change of the ropes 3 from a taut state to a slack state has the following conditions:

the first one is: in the paying-off process of the rope 3, the bearing platform 4 for bearing goods is manually supported or is interfered by other objects to cause the goods not to be normally put down, and at the moment, if the rope 3 is continuously paid-off, the rope 3 in a tight state is gradually changed into the rope 3 in a loose state;

the second method is as follows: rope 3 between motor 2 to plummer 4 is dragged (trigger 121 is located and pulls between the point on motor 2 and rope 3), and the goods can't normally be transferred, and along with the continuation unwrapping wire of rope 3, rope 3 just can become the lax state gradually.

It should be noted that, in the paying-off process of the hoisting machine in the prior art, if the goods does not reach the preset position, and the movement of the carrier 4 for carrying the goods is blocked or the rope 3 is pulled, the rope 3 is stacked together due to the continuous rotation of the motor 2 to pay out the rope 3, which easily causes the rope 3 to be wound, that is, the hoisting machine in the prior art has low safety in use.

In view of the above problem, the protection device 1 of the present invention assembles the trigger 121 with the rope 3 of the elevator, when the rope 3 is in a tight state, based on the pushing force of the rope 3 to the trigger 121, the trigger 121 has a tendency to move to the first position, then, by applying a driving force to the trigger 121 opposing the pushing force (the driving force may be the gravity of the trigger 121 itself or the force applied to the trigger 121 by other structures), based on the driving force, the trigger 121 has a tendency to move to the second position, and finally, the trigger 121 triggers the first switch to enter the second state at the second position, so as to stop the motor 2 of the elevator, that is, when the pushing force is greater than the driving force (i.e. when the rope 3 is in the tight state), the trigger 121 moves to the first position, the first switch enters the first state, and the motor 2 can normally operate, when the pushing force is smaller than the driving force (i.e. the rope 3 is in a slack state), the trigger 121 moves to the second position, the first switch enters the second state, and the motor 2 of the hoist is stopped. Like this, when the plummer 4 that bears the weight of the goods removes and is hindered or rope 3 is dragged and lead to rope 3 to become lax, motor 2 can be stopped by timely system, and the effectual winding phenomenon of rope 3 emergence of having avoided. It can be seen that the protection device 1 of the present application can improve the safety of use of the hoisting machine of the prior art.

Optionally, the second state is a switch off state and the first switch is a normally open switch. That is, when the first switch is in the second state, the first switch is opened, the electric circuit of the motor 2 of the hoisting machine is also opened, and subsequently the motor 2 is deactivated.

Optionally, the trigger 12 further comprises an actuating member 122, the actuating member 122 being adapted to apply an actuating force to the trigger member 121 to cause the trigger member 121 to have a tendency to move towards the second position. It should be noted that the design of the present application is not limited thereto, and in other embodiments, the driving force may also be the gravity of the trigger 121 itself.

Optionally, in some embodiments, the driving member 122 is a resilient member. It can be understood that two ends of the elastic member along the deformation direction are respectively connected to the triggering member 121 and the frame of the elevator, and when the triggering member 121 is located at the first position, the elastic member is in a stretched state because the elastic member can elastically return, that is, the elastic force of the spring can drive the triggering member 121 to move to the second position. Specifically, the driving member 122 may be a spring, a pressure spring, a magnetic member, an elastic rubber band, or the like.

Optionally, the trigger 12 further includes a connecting member 123, two ends of the connecting member 123 are respectively connected to the first switch and the triggering member 121, and the connecting member 123 is configured to trigger the first switch to be closed when the triggering member 121 is in the first position and trigger the second switch to be opened when the triggering member 121 is in the second position. It can be understood that the two extending ends of the connecting member 123 are respectively connected with the triggering member 121 and the first switch, and the user can change the positions of the triggering member 121 and the first switch more freely based on the connecting member 123.

Optionally, the connecting member 123 is an elastic member. It can be understood that, so set up, connecting piece 123 and driving piece 122 are the elastic component, through elastic force between them, are favorable to increasing the drive power that trigger 121 received, when the rope 3 of being convenient for is lax, let trigger 121 remove as early as possible to the second position to make motor 2 closed as early as possible, promote the security of lifting machine operation. Specifically, the connecting member 123 may be a spring, a pressure spring, a magnetic member, an elastic rubber band, or the like.

Optionally, the triggering member 121 includes a movable plate 121a and a follower wheel 121b, the movable plate 121a is connected to the driving member 122 and the connecting member 123, and the follower wheel 121b is rotatably disposed on the movable plate 121a and can be used for pressing against the rope 3 of the elevator; when assembled with a hoist, the movable plate 121a is rotatably disposed on the hoist and can rotate along with the change of the magnitude relationship between the pushing force and the driving force, so as to drive the connecting member 123 to change the state of the first switch. The follower wheel 121b is rotatably provided on a movable plate 121a, the follower wheel 121b is used for pressing against the rope 3 of the hoist, the movable plate 121a is respectively connected with the driving member 122 and the connecting member 123, and the movable plate 121a is used for rotatably provided on the hoist. The rope 3 and the follower wheel 121b are in sliding fit with each other, when the rope 3 applies a pushing force to the follower wheel 121b, when the pushing force is greater than the sum of the elastic forces of the driving member 122 and the connecting member 123 (i.e., the rope 3 is in a tightened state), the movable plate 121a rotates to a first position, the connecting member 123 closes the first switch, the motor 2 operates normally, and when the pushing force is less than the sum of the elastic forces of the driving member 122 and the connecting member 123 (i.e., the rope 3 is in a loosened state), the movable plate 121a rotates to a second position, the connecting member 123 opens the first switch, and the motor 2 is closed.

Optionally, the triggering member 121 further includes a retaining ring 121c, and the retaining ring 121c and the wheel body of the follower wheel 121b jointly enclose to form a fastening hole 121d, and the fastening hole 121d is used for the rope 3 to pass through. It will be appreciated that this arrangement is advantageous in limiting the position of the rope 3 to enable a sliding fit with the follower wheel 121b after the rope 3 has been brought from a slack condition to a taut condition.

Optionally, the detector 11 further comprises a second switch for stopping the motor 2 of the hoist when the bearing platform 4 of the hoist moves to the preset loading position, and the second switch is connected in series with the first switch in the detection circuit of the detector 11. The preset loading position is used to indicate the position of the carrier table 4 at a certain height from the ground, and the preset loading position can be set by the user. It can be understood that when the bearing table 4 moves to the preset loading position, the second switch is triggered to be closed, the detector 11 then sends a stopping signal to the controller, and the controller turns off the motor 2 when receiving the stopping signal of the detector 11, so that the operation reliability of the elevator is improved. In particular, the first switch and the second switch are connected in series, that is to say, the electric machine can be braked both when the first switch is in the second state or when the second switch is closed. Further, in the present application, the controller preferably processes the stop signal of the detector 11, that is, after receiving the stop signal of the detector 11, the controller does not activate the motor 2 regardless of how the user presses the forward rotation key 511 or the reverse rotation key 512.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A protection device is applied to lifting machine, its characterized in that includes:

the detector is provided with a first switch, the first switch is provided with a first state and a second state, one of the first state and the second state is a switch-off state, and the other one of the first state and the second state is a switch-on state, and the detector is used for controlling and stopping a motor of the hoisting machine when the first switch is in the second state; and

2. The protection device of claim 1, wherein the second state is a switch open state and the first switch is a normally open switch.

3. The protective device of claim 2 wherein the trigger further comprises an actuating member for applying the actuating force to the trigger member to cause the trigger member to have a tendency to move to the second position.

4. The protective device of claim 3, wherein the trigger further comprises a connecting member, two ends of the connecting member are respectively connected to the first switch and the trigger member, and the connecting member is configured to trigger the first switch to be in the first state when the trigger member is in the first position and to trigger the first switch to be in the second state when the trigger member is in the second position.

5. The protective device of claim 4 wherein the drive member is a resilient member; and/or

The connecting piece is an elastic piece.

6. The protection device as claimed in claim 4, wherein the triggering member comprises a movable plate connected to both the driving member and the connecting member, and a follower wheel rotatably provided on the movable plate and adapted to press against the rope of the hoisting machine;

7. The protection device of claim 6, wherein the trigger member further comprises a retaining ring, and the retaining ring and the wheel body of the follower wheel jointly enclose a retaining hole for the rope to pass through.

8. The protection device of claim 1, wherein the detector further comprises a second switch for stopping the motor of the hoist when the carrier of the hoist moves to a preset loading position, and the second switch is connected in series with the first switch in the detection circuit of the detector.

9. A hoisting machine, characterized in that, includes motor, rope, plummer and the protection device of any one of claims 1 to 8, the motor is connected with the plummer drive through the rope, the rope can be abutted with the trigger piece of the protection device.

10. The hoist as in claim 9, the protection device further comprising a console having a lift switch electrically connected to the motor.