CN217230000U - Automatic hook retracting device of lifting hook - Google Patents

Abstract

The utility model relates to an automatic hook retracting device of a lifting hook, belonging to the technical field of crane auxiliary equipment; the lifting arm comprises a lifting arm head and a lifting hook assembly, wherein an arm head wheel set, a third wheel and a limit switch are arranged inside the lifting arm head, a triangular support is hinged to one side, far away from a lifting arm, of the lower end of the lifting arm head through a rotating pin shaft, and a first guide plate is fixed to the bottom edge of the support; the lifting hook assembly comprises a lifting hook, a bracket and a lifting hook wheel set, the lifting hook wheel set is arranged in the bracket, the lifting hook is connected to the lower end of the bracket, a second guide plate is fixed at the upper end of the bracket, and the first guide plate is connected with the top of the second guide plate in a sliding manner to form a guide device; the lifting hook assembly is connected with the winding drum assembly through a steel wire rope, the steel wire bypasses from the last pulley of the arm head wheel set, then bypasses from one end of the passing wheel far away from the suspension arm, and finally is fixed inside the arm head of the suspension arm through a wedge-shaped joint; the problems that the existing automatic hook retracting device is complex in operation, large in potential safety hazard and large in hanging size of a lifting hook are solved.

Description

Automatic hook retracting device of lifting hook

Technical Field

The utility model belongs to the technical field of the hoist auxiliary assembly, concretely relates to automatic receipts hook device of lifting hook.

Background

The existing crane needs to fix the hoisting hook after completing the operation under the condition of having a hoisting device. When not being equipped with automatic hook device of receiving, need increase lifting hook fixing device to accomplish the operation back manual fixed operation to the lifting hook at the lifting hook, lead to the operating efficiency lower, and waste time and energy.

The existing automatic hook retracting device or the automatic locking device also has some defects, for example, song fei in the article entitled "principle and application of automatic hook retracting device of mechanical lorry-mounted crane" published in "science and technology wind", proposes an automatic hook retracting device, as shown in fig. 1, the device comprises a connecting rod, a connecting seat, a high-position limiter, an audible and visual alarm, a limiting block and the like, and the working principle is as follows: after the lifting hook rises to trigger the high limiter, an audible and visual alarm signal is generated to remind an operator to prevent the overwinding of the winch, when the lifting hook is continuously operated to rise, the opening and closing state of the multi-way valve needs to be adjusted, so that the groove above the lifting hook is stably contacted with the connecting seat, the lifting hook rotates around the pin under the action of the eccentric device after being contacted, and finally the lifting hook is turned over and is contacted with the limiting device, so that the automatic hook retracting operation is completed.

The above-described devices have disadvantages including: in the hook retracting process, attention needs to be paid to the adjustment of the opening and closing state of the multi-way valve to ensure that the groove above the lifting hook is stably contacted with the connecting seat, certain risks exist in the operation process, and the operation can be completed only by skillful operation; after the lifting hook is turned over, the lifting hook is contacted with a limiting device, no pressure protection measure is provided in the process, the lifting hook can stop the hook retracting action only by limiting to enable the pressure to reach the unloading pressure of a system, and certain potential safety hazards exist; the connecting rod is too long, so that the suspension size of the lifting hook is too large after the hook is retracted.

SUMMERY OF THE UTILITY MODEL

The utility model overcomes the defects of the prior art and provides an automatic hook retracting device of a lifting hook; the problems that an existing automatic hook retracting device is complex in operation, large in potential safety hazard and large in hanging size of a lifting hook are solved.

In order to achieve the purpose, the utility model is realized by the following technical scheme.

An automatic hook retracting device of a lifting hook comprises a suspension arm head and a lifting hook assembly, wherein the suspension arm head is arranged at the end part of a crane suspension arm; the suspension arm comprises a suspension arm head, a suspension arm and a suspension arm, wherein an arm head wheel set is arranged in the suspension arm head, one side, far away from the suspension arm, of the lower end of the suspension arm head is hinged with a support through a rotating pin shaft, the support is of a triangular structure, a first guide plate is fixedly arranged on the bottom edge of the support, two upward bending parts are symmetrically arranged at two ends of the first guide plate respectively, connecting lines of the upper end point of the support and two end points of the bottom edge are two side edges of the support respectively, the angle between one side edge far away from the suspension arm and the bottom edge of the support is larger than 90 degrees, and a through wheel and a limit switch are further arranged in the suspension arm head; the lifting hook assembly comprises a lifting hook, a bracket and a lifting hook wheel set, the lifting hook wheel set is arranged in the bracket, the lifting hook is rotatably connected to the lower end in the bracket, a second guide plate is fixedly arranged at the upper end of the bracket, and two ends of the second guide plate are respectively symmetrically provided with an upward bending part; the bottom of the first guide plate is in contact with the top of the second guide plate, and the first guide plate is connected with the top of the second guide plate in a sliding manner to form a guide device; the lifting hook assembly is connected with the winding drum assembly through a steel wire rope, the steel wire rope is led out from the winding drum, sequentially bypasses the pulley of the arm head wheel set and the pulley of the lifting hook wheel set, bypasses the last pulley of the arm head wheel set, bypasses the end, far away from the lifting arm, of the passing wheel, and is finally fixed inside the arm head of the lifting arm through the wedge-shaped joint.

Furthermore, the inner side of the upper end of the boom head is fixedly connected with the outer side of the end part of the boom.

Furthermore, the arm head wheel set consists of the same pulleys and is coaxially and fixedly arranged inside the arm head of the suspension arm.

Furthermore, the lifting hook wheel set consists of the same pulleys and is coaxially and fixedly arranged inside the bracket.

Furthermore, an anti-falling stopper is arranged on the lifting hook, and a locking spring is arranged on the anti-falling stopper.

Furthermore, the third wheel is arranged at the upper part of the arm head wheel set, and the wheel shaft of the third wheel is parallel to the wheel shaft of the arm head wheel set.

Furthermore, the wedge-shaped joint is arranged at the upper part of the idler wheel and on one side close to the end part of the suspension arm.

The utility model discloses produced beneficial effect for prior art does:

(1) the utility model provides an automatic receive hook device has overcome the drawback of current automatic receipts hook device connecting rod overlength, makes the action security higher.

(2) The utility model provides an automatic hook closing device sets up eccentric action mode, and lifting hook rising direction of motion and upset round pin axle exist eccentrically to make the lifting hook can carry out automatic upset under the wire rope pulling force effect, as long as four-bar linkage reasonable in design, according to the invention notice strict implementation, whole automatic upset process can realize full automation, need not to carry out any artificial regulation (need carry out the control of multichannel valve when having had automatic upset), can realize automatic upset.

(3) The utility model provides an automatic hook retracting device, existing lifting hook are automatic to overturn and lean on pressure to unload when reaching system pressure, have certain potential safety hazard, the invention is provided with limit switch, promptly after the automatic upset of lifting hook targets in place, touch limit switch, make its signaling make the lifting hook upset action terminate, improved the operation security.

(4) The utility model provides an automatic receive hook device has increased the bracket of lifting hook assembly and the guider of support contact to make the atress more optimize.

(5) The utility model provides an automatic receive hook device changes automatic turning device connecting rod into the support contact, has increased the contact surface with the lifting hook top, prevents that the dead angle from producing.

Drawings

The invention will be described in further detail with reference to the accompanying drawings:

fig. 1 is a schematic structural view of a conventional automatic hook retracting device;

FIG. 2 is a front view of the present invention in its entirety and a partial left side view;

FIG. 3 is a first schematic diagram of the present invention;

FIG. 4 is a second schematic diagram of the present invention;

FIG. 5 is a third schematic diagram of the present invention;

the solar energy high-position limiter comprises a solar energy high-position limiter 1, a connecting rod 2, a connecting seat 3, a hoisting hook 4, a first steel wire rope 5, a limiting block 6, an arm head wheel set 7, a support 8, a first guide plate 9, a hoisting hook 10, a bracket 11, a hoisting hook wheel set 12, a second guide plate 13, a third wheel 14, a limit switch 15, a rotating pin shaft 16, a steel wire rope 17, a wedge-shaped joint 18, a hoisting hook assembly 19 and a virtual rod 20.

Detailed Description

In order to make the technical problem, technical scheme and beneficial effect that the utility model will solve clearer and more obvious, combine embodiment and attached drawing, it is right to go on further detailed description the utility model discloses. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solution of the present invention is described in detail below with reference to the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

As shown in fig. 2, the utility model provides an automatic hook closing device of lifting hook, including davit arm head and lifting hook assembly 19, davit arm head sets up in crane jib's tip, the inboard tip outside fixed connection with the davit of upper end of davit arm head.

Arm head wheel set 7 is arranged in the arm head of the suspension arm, and the arm head wheel set 7 is composed of the same pulleys and is coaxially and fixedly arranged in the arm head of the suspension arm. The lower end of the boom head is hinged with a support 8 through a rotary pin 16 at one side far away from the boom. The support 8 is of a triangular structure, a first guide plate 9 is fixedly arranged on the bottom side of the support 8, and two ends of the first guide plate 9 are symmetrically provided with an upward bending part respectively. The connecting lines of the upper end point and the two end points of the bottom edge of the support 8 are two side edges of the support 8 respectively, wherein the angle between one side edge far away from the suspension arm and the bottom edge of the support 8 is larger than 90 degrees.

Hook assembly 19 includes lifting hook 10, bracket 11, lifting hook wheelset 12 set up in the inside of bracket 11, lifting hook wheelset 12 comprises the same pulley to coaxial fixed set up in inside of bracket 11. The lifting hook 10 is rotatably connected to the lower end of the bracket 11, the lifting hook 10 is provided with an anti-falling stopper, and the anti-falling stopper is provided with a spring and can be always kept in a locking state to prevent the hung part from falling off during hanging operation.

The upper end of the bracket 11 is fixedly provided with a second guide plate 13, and two ends of the second guide plate 13 are respectively and symmetrically provided with an upward bending part. The bottom of the first guide plate 9 contacts the top of the second guide plate 13, and the first guide plate 9 is slidably connected to the top of the second guide plate 13, thereby forming a complete guide device.

The inside of the arm head of the suspension arm is also rotatably connected with a third wheel 14, the third wheel 14 is arranged at the upper part of the arm head wheel set 7, and the wheel axle of the third wheel 14 is parallel to the wheel axle of the arm head wheel set 7.

The lifting hook assembly 19 is connected with a winding drum assembly through a steel wire rope 17, and the winding drum assembly is driven by a hoisting oil motor. The steel wire rope 17 comes out from the winding drum, passes through the first pulley of the arm head wheel set 7, then passes through the lower part of the first pulley of the hook wheel set 12, then passes through the upper part of the second pulley of the arm head wheel set 7, then passes through the lower part of the second pulley of the hook wheel set 12, and is sequentially wound and connected.

After the wire rope 17 passes by the last pulley of the arm head wheel set 7, the wire rope passes by the end of the idler wheel 14 far away from the arm, and finally the wire rope is fixed inside the arm head of the arm through the wedge-shaped joint 18. The wedge joint 18 is arranged at the upper part of the idler 14 and at one side close to the end part of the suspension arm.

And a limit switch 15 is arranged inside the boom head of the suspension arm.

The utility model discloses a theory of operation does:

the automatic hook retracting device can be simplified into a motion diagram of a hook overturning device shown in fig. 3, and the whole device is converted into a four-bar derivative mechanism-double-slider mechanism. When the lifting hook 10 starts to retract under the driving of the hoisting mechanism through the steel wire rope 17, because the automatic hook retracting device has eccentricity around the rotating pin 16, under the action of the pulling force of the steel wire rope, the lifting hook 10 slides upwards and rightwards along the virtual rod 20 and the guide device respectively, and finally the lifting hook 10 is turned over. Wherein the virtual bar 20 is the line connecting the center of the wheel set of the arm head and the center of the hook.

According to the use requirement of automatic hook retracting, the motion cycle of the hook overturning device is not more than 90 degrees. And the cycle can be divided into two phases according to the relative motion change of the components.

The first stage is as follows:

referring to the kinematic diagram of FIG. 3, the hook assembly 19 is flipped from the initial state until CD/AB is the first stage. At this stage the hook assembly 19 moves along the AE bar from E to A and along the CD bar from C to D.

And a second stage:

after the hook assembly 19 is flipped over to CD/AB, flipping continues until the cycle is over as the second stage. At this stage the hook assembly 19 moves along the AE bar from E to A and along the CD bar from D to C.

The first and second stage breakpoint conditions are shown in fig. 4. The contact surface of the bracket 11 of the hook assembly 19 with the support 8 is at a minimum.

The four-bar mechanism has dead point position when the connecting rod is used as a driving element. In the automatic hooking device, the abutment 8 can be regarded as a connecting rod and therefore also presents a dead point position. When the state of the automatic hooking device approaches the position (as shown in fig. 5), the driving force required for turning and the stress on the bracket are increased dramatically. Therefore, the design is avoided as much as possible.

It should be noted that the bracket 11 and the support 8 of the hook assembly 19 must not come out of contact in the two-phase movement boundary state shown in fig. 4. Meanwhile, the length of the bottom surface CD of the support 8 is lengthened, so that the stress resultant line EA of the hook 10 is kept to be intersected with the CD in the whole period in the motion process of the hook 10.

When the design principle is met, the limit switch 15 is arranged inside the arm head of the suspension arm, when the lifting hook 10 automatically turns to be in contact with the limit switch 15, a signal is sent out to stop the lifting action of the lifting hook 10, the hoisting mechanism stops working, and the action safety of the system is ensured, as shown in fig. 2.

In the process of winding the steel wire rope 17, the design of the idle pulley 14 is added, so that the steel wire rope 17 moves away from one side of the boom after being separated from the winding of the arm head wheel set, and the steel wire rope 17 is less prone to interference of the hook assembly 19, as shown in fig. 2.

After the automatic hook retracting operation is carried out, because the interior of the hook assembly 19 contains a movable pulley and is in a 2-multiplying-power mode, a certain angle exists between the hook 10 and the plane of the support 8, and the V-shaped guide device is additionally arranged, so that the bracket 11 of the hook assembly 19 is more easily and completely contacted with the support 8, and the stress is optimized, as shown in figure 2.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (7)

1. The utility model provides an automatic receipts hook device of lifting hook which characterized in that: the crane boom assembly comprises a boom arm head and a lifting hook assembly (19), wherein the boom arm head is arranged at the end part of a crane boom;

an arm head wheel set (7) is arranged inside the boom arm head, a support (8) is hinged to one side, far away from the boom, of the lower end of the boom arm head through a rotating pin shaft (16), the support (8) is of a triangular structure, a first guide plate (9) is fixedly arranged on the bottom edge of the support (8), two ends of the first guide plate (9) are respectively symmetrically provided with an upward bent part, connecting lines of the upper end point of the support (8) and two end points of the bottom edge are respectively two side edges of the support (8), an angle between one side edge far away from the boom and the bottom edge of the support (8) is larger than 90 degrees, and a passing wheel (14) and a limit switch (15) are further arranged inside the boom arm head;

the lifting hook assembly (19) comprises a lifting hook (10), a bracket (11) and a lifting hook wheel set (12), the lifting hook wheel set (12) is arranged inside the bracket (11), the lifting hook (10) is rotatably connected to the lower end inside the bracket (11), a second guide plate (13) is fixedly arranged at the upper end of the bracket (11), and two ends of the second guide plate (13) are respectively and symmetrically provided with an upward bent part;

the bottom of the first guide plate (9) is in contact with the top of the second guide plate (13), and the first guide plate (9) is connected with the top of the second guide plate (13) in a sliding manner to form a guide device;

hook assembly (19) are connected with the reel assembly through wire rope (17), wire rope (17) come out from the reel, walk around the pulley of arm head wheelset (7) and hook wheelset (12) in proper order, walk around the back from the last pulley of arm head wheelset (7), and the one end of keeping away from the davit from passing wheel (14) again is walked around, is fixed in through wedge joint (18) at last in the inside of davit arm head.

2. The automatic retraction device of a lifting hook as claimed in claim 1, wherein: the inner side of the upper end of the boom head of the boom is fixedly connected with the outer side of the end part of the boom.

3. The automatic retracting device of a lifting hook according to claim 1, characterized in that: the arm head wheel set (7) consists of the same pulleys and is coaxially and fixedly arranged inside the arm head of the suspension arm.

4. The automatic retraction device of a lifting hook as claimed in claim 1, wherein: the lifting hook wheel set (12) consists of the same pulleys and is coaxially and fixedly arranged inside the bracket (11).

5. The automatic retraction device of a lifting hook as claimed in claim 1, wherein: the lifting hook (10) is provided with an anti-falling stopper, and the anti-falling stopper is provided with a locking spring.

6. The automatic retraction device of a lifting hook as claimed in claim 1, wherein: the third wheel (14) is arranged at the upper part of the arm head wheel set (7), and the wheel axle of the third wheel (14) is parallel to the wheel axle of the arm head wheel set (7).

7. The automatic retracting device of a lifting hook according to claim 1, characterized in that: the wedge-shaped joint (18) is arranged at the upper part of the idler wheel (14) and close to one side of the end part of the suspension arm.

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