CN211366738U - Counterweight fixing device of movable counterweight mechanism - Google Patents

Abstract

The utility model discloses a counter weight fixing device of portable counter weight mechanism, including setting up the counter weight in hoist case below, be equipped with two symmetrical arrangement's dog on the top end face of counter weight, two dogs are located the left and right sides of hoist case, are equipped with the cushion corresponding with the dog on the left and right sides face of hoist case, all be equipped with on dog and the cushion with bolt assorted pinhole, the end-to-end connection of bolt has electronic jar, is equipped with position detection element on the electronic jar, position detection element's output is connected with the controller, the output of controller is connected with the alarm. The utility model discloses a counter weight fixing device adopts electronic jar to promote the bolt, makes counter weight and hoist case link to each other to can provide safety alarm according to electronic jar cylinder end position state.

Description

Counterweight fixing device of movable counterweight mechanism

Technical Field

The utility model relates to a counter weight fixing method technical field, concretely relates to counter weight fixing device of portable counter weight mechanism to be applied to medium and small-tonnage mobile crane.

Background

Interpretation of related terms:

and (3) counterweight: the moment balancing device is used for balancing the moment of a hoisting weight relative to a rotation center on a hoisting machine and is usually arranged below a hoisting box of the hoisting machine.

Movable counterweight: fixed at initial position when driving, and can move backwards when hanging the weight.

The stability of the whole machine is one of the key indexes influencing the hoisting performance of the hoisting machinery, so that the weight of the counterweight is increased to the limit that an axle can bear when the hoisting machinery is designed, and the stability of the whole machine is improved to the maximum extent.

For small-tonnage products, the weight of the whole vehicle and the bridge load are limited, the quality of the vehicle-mounted counterweight seriously limits the stability of the whole machine, and the use cost of additionally increasing the vehicle-conveying combined counterweight is too high, so that the distance between the gravity center of the counterweight and the rotation center is increased, and the lifting performance of the whole machine is guaranteed. However, if the aspects of axle load distribution, stability of vehicle running, safety and appearance shape are considered, the backward moving distance of the counterweight is extremely limited. Therefore, the balance weight gravity center is moved backwards during operation, and the balance weight is retracted during a driving state, so that the scheme is economical and effective.

Fixed counter weight adopts the bolt-up, and the counter weight is safe relatively in the in-process of traveling. The small-tonnage crane adopts a movable counterweight technology, and the counterweight is always connected with a counterweight moving device, so that the movable counterweight needs to be firmly fixed when the vehicle runs, and the safety and the reliability of the vehicle in the running process are ensured.

The crane that current adoption portable counter weight technique all does not install the counter weight at the state of traveling, and its counter weight fixing device only takes effect under the hoist weight operating mode, and its fixed mode is as follows:

referring to fig. 1, a section of a latch cylinder 11 is fixed on a turntable or a winch case 10, the other end of the latch cylinder 11 is connected with a latch 12, and a lug plate 13 is installed on a counterweight 14 or a counterweight support. When the balance weight needs to be fixed, the position of the balance weight 14 is judged by using a sensor arranged on the bolt oil cylinder 11, the bolt oil cylinder 11 extends out, and the bolt 12 is pushed into a pin hole on the lug plate 13 to fix the balance weight.

The technical scheme has the following technical defects: a. the bolt oil cylinder is fixed in the hoisting box, when the bolt oil cylinder extends out, the balance weight is fixed at the bottom of the hoisting box, and if the system fails, the bolt oil cylinder cannot retract, so that the maintenance is extremely inconvenient; b. the system has no bolt position detection, the bolt state can not be monitored in the working process, and when the balance weight needs to be extended or retracted, if the bolt does not retract, the balance weight and the bolt can interfere with each other, so that the structure is damaged.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome not enough among the prior art, provide a counter weight fixing device of portable counter weight mechanism, adopt electronic jar to promote the bolt, make counter weight and hoist case link to each other to can provide safety alarm according to electronic jar cylinder end position state.

For solving the technical problem, the utility model provides a counter weight fixing device of portable counter weight mechanism, characterized by, including setting up the counter weight in hoist case below, be equipped with the dog of two symmetrical arrangement on the top end face of counter weight, two dogs are located the left and right sides of hoist case, be equipped with the cushion corresponding with the dog on the left and right sides face of hoist case, all be equipped with on dog and the cushion with bolt assorted pinhole, the end-to-end connection of bolt has electronic jar, be equipped with position detection component on the electronic jar, position detection component's output is connected with the controller, the output of controller is connected with the alarm.

Preferably, the stop block is fixedly connected with the electric cylinder through a connecting plate.

Preferably, the position detection element is a distance sensor.

Preferably, the position detection element is a proximity switch.

Preferably, the alarm is an audible and visual alarm.

Preferably, the alarm is disposed in the cab.

Compared with the prior art, the utility model discloses the beneficial effect who reaches is: the utility model discloses the device adopts electronic jar to promote the bolt, makes counter weight and hoist case link to each other, provides safety alarm according to electronic jar cylinder end position state.

Drawings

FIG. 1 is a schematic structural view of a conventional mobile counterweight fixing method;

fig. 2 is a schematic structural view of the movable counterweight mechanism of the present invention;

FIG. 3 is a top view of the counterweight;

fig. 4 is a side view of the hoist box.

Reference numerals: 10. a hoisting box; 11. a bolt oil cylinder; 12. a bolt; 13. an ear plate; 14. balancing weight;

20. a hoisting box; 21. balancing weight; 22. a stopper; 23. an electric cylinder; 24. a bolt; 25. cushion blocks; 26. a connecting plate; 27. and an oil cylinder.

Detailed Description

The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

In the description of the present invention, it is noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including other elements not expressly listed, in addition to those listed.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", 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 element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present patent application can be understood in specific cases by those skilled in the art.

The utility model discloses a counter weight fixing device of portable counter weight mechanism, see fig. 2 and show, counter weight 21 is located the below of hoist case 20, be equipped with the dog 22 of two symmetries on counter weight 21's the top end face, it is shown specifically to refer to fig. 3, every dog 22's outside direction is through the fixed electronic jar 23 that is equipped with of connecting plate 26, the cylinder end connecting pin 24 of electronic jar 23, be equipped with the pinhole that matches with the bolt on two dogs 22, these two dogs 22 are located hoist case 20's the left and right sides face, be equipped with the cushion 25 of symmetry on hoist case 20's the left and right sides face, it is shown specifically to refer to fig. 4, be equipped with on the cushion 25 with 24 assorted pinholes, a.

When the balance weight is needed, the electric cylinder 23 pushes the bolt 24 to sequentially pass through the stop block 22 and the pin holes on the cushion block 25, so that the balance weight 21 is connected with the hoisting box 20, when the balance weight is not needed, the electric cylinder 23 retracts the bolt 24, the balance weight 21 is disconnected with the hoisting box 20, and then the oil cylinder 27 connected with the balance weight 21 is actuated to push the balance weight 20 to move.

The electric cylinder 23 is also provided with a position detection unit, the position detection unit is used for detecting the telescopic length of the cylinder head of the electric cylinder, the position detection unit outputs the acquired data to the controller in real time, and if the controller judges that the cylinder head of the electric cylinder does not extend or contract completely, the controller controls the alarm to give an alarm.

The position detection unit can be realized by elements such as a distance sensor or a proximity switch, the controller can be realized by a single chip microcomputer or a microcontroller in the prior art, and the alarm can be realized by an audible and visual alarm. The alarm is arranged in the cab so that the driver can find the alarm in time.

The utility model discloses counter weight fixing device's working process does: when the counterweight 21 is retracted to the initial position, the electric cylinder 23 extends out to push the bolt 24 to extend out, and the bolt 24 passes through the stop block 22 and the pin hole of the cushion block 25 to fix the counterweight 21 on the hoisting box 20; when the counterweight 21 needs to be moved, the electric cylinder 23 is retracted, the plug pin 24 is retracted, and the counterweight 21 can be moved backward. When the counterweight 21 needs to move, the position detection element is used for detecting whether the electric cylinder 23 contracts fully, if not, the alarm gives an alarm to prompt a driver to retract the electric cylinder continuously until the electric cylinder retracts fully, and the counterweight cannot move before the electric cylinder retracts fully; when the counter weight moves to the initial position, the position detection unit detects whether the electric cylinder extends fully, if not, the alarm gives an alarm to prompt a driver to continue to extend the electric cylinder until the electric cylinder extends fully, and next action cannot be carried out before the electric cylinder extends fully.

The utility model discloses a counter weight fixing device, at the vehicle in-process of traveling, the electronic jar position of real-time detection, if electronic jar appears becoming flexible at the in-process of traveling, it is dead to lead to the bolt not to lock, sends out the police dispatch newspaper in the driver's cabin, reminds the driver to fix.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (6)

1. The utility model provides a counter weight fixing device of portable counter weight mechanism, which is characterized by, including setting up the counter weight in hoist case below, be equipped with two symmetrical arrangement's dog on the top end face of counter weight, two dogs are located the left and right sides of hoist case, be equipped with the cushion corresponding with the dog on the left and right sides face of hoist case, all be equipped with on dog and the cushion with bolt assorted pinhole, the end-to-end connection of bolt has electronic jar, be equipped with position detection element on the electronic jar, position detection element's output is connected with the controller, the output of controller is connected with the alarm.

2. The counterweight fixing device of a movable counterweight mechanism according to claim 1, wherein the stopper is fixedly connected with the electric cylinder through a connecting plate.

3. The counterweight holding device of a movable counterweight mechanism according to claim 1, wherein the position detecting element is a distance sensor.

4. The counterweight holding device of a movable counterweight mechanism according to claim 1, wherein the position detecting element is a proximity switch.

5. The counterweight fixing device of a movable counterweight mechanism according to claim 1, characterized in that the alarm is an audible and visual alarm.

6. The counterweight fixing device of a movable counterweight mechanism according to claim 1, wherein the alarm is provided in the cab.

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