CN106865436A - Crane wire rope handling hoisting mechanism - Google Patents

Abstract

The invention discloses a rope-threading winch mechanism for a crane, comprising: a hydraulic motor, a frame, a reel, a brake, a differential planetary gear train, a steel wire rope and a rope presser; , the inside of the reel is provided with a differential planetary gear train and a brake, and the hydraulic motor is connected to the reel through the differential planetary gear train; the outer wall of the reel is wound with a wire rope, and the frame is provided with Rope pressure device for limit wire rope. The rope-threading winch mechanism for cranes according to the present invention adopts the integrated drum design of the drum and the inner ring gear, and has a built-in structure of the secondary differential gear train. The planetary frame adopts an integral pallet type planetary frame. The size is small and the structure is compact, which greatly reduces the overall size of the rope winch.

Description

Rope hoisting mechanism for cranes

technical field

The invention relates to a rope-threading hoisting mechanism applied to a large-scale crane and used for threading and tensioning a hoisting wire rope on a jib frame.

Background technique

At present, most cranes still use manual traction or auxiliary equipment to thread the hoisting wire rope, which consumes manpower and material resources in the installation and replacement of the hoisting wire rope, making the hoisting preparation work inefficient; Leading and tensioning hoisting wire ropes, but most of these hoisting mechanisms are large in size and heavy in weight, which cannot meet the requirements of the complete machine for weight control and easy installation and debugging.

Contents of the invention

According to the above-mentioned technical problems, a rope-threading winch mechanism for cranes is provided, which is used to solve the shortcomings of existing cranes that consume manpower and material resources in the installation and replacement of hoisting wire ropes and low efficiency of hoisting preparation operations. The technical means adopted in the present invention are as follows:

A rope-threading hoisting mechanism for a crane, comprising: a hydraulic motor, a frame, a reel, a brake, a differential planetary gear train, a steel wire rope and a rope presser; A differential planetary gear train and a brake are arranged inside the drum, and the hydraulic motor is connected to the reel through a differential planetary gear train; the outer wall of the reel is wound with a wire rope, and the frame is provided with a wire rope for limiting Rope press.

Preferably, the differential planetary gear train includes: a primary sun gear, a primary planetary gear, a primary planetary carrier, a secondary sun gear, a secondary planetary gear and a secondary planetary carrier; on the output shaft of the hydraulic motor A spline sleeve is provided, the internal teeth of the spline sleeve mesh with the first-stage sun gear of the differential planetary gear train, and the first-stage sun gear meshes with at least three first-stage planetary gears; the second-stage sun gear There are at least three second-stage planetary gears meshed, and the first-stage planetary gears and the second-stage planetary gears are simultaneously engaged with the internal teeth of the reel for transmission.

Preferably, the first-stage planetary gear is arranged on the first-stage planetary carrier, and the first-stage planetary carrier is engaged with the second-stage sun gear through splines, and the second-stage planetary gear is arranged on the second-stage planetary carrier, The secondary planetary frame is fixed on the frame, and a bearing is arranged between the outer wall of the secondary planetary frame and the inner wall of the drum; There are bearings between them.

As preferably, the rope presser includes a tension spring, a pressing rod, a connecting rod, an outer pressing block, an inner pressing block, a long drum and a short drum; there are two parallel pressing rods on the said rope pressing device, and the two pressing rods are arranged in parallel. The roots of the pressure rods are respectively connected to the frame through pin shafts, and the middle parts of the two pressure rods are fixedly connected through the middle rod. The outer side of the inner pressing block at the front end of the pressing bar is provided with a long roller for pressing the rope, and the outer pressing blocks at the front end of the two pressing bars are respectively provided with a short roller; one end of the tension spring is fixed on the front end of the pressing bar, and the other end is Fix it on the frame so that the front end of the pressure bar is pulled towards the wire rope.

Preferably, the brake is a wet multi-plate brake.

Preferably, the frame is fixed on the crane through pin connection.

Preferably, the brake includes a piston, a spring and a friction plate; the spring is arranged inside the piston, the friction plate is arranged at the bottom of the piston, and the friction plate includes an inner friction plate and an outer friction plate; the inner friction plate It meshes with the outer teeth of the spline sleeve, and the outer friction plate meshes with the inner teeth of the secondary planet carrier.

Preferably, there are 3 to 7 said primary planetary gears and secondary planetary gears respectively evenly distributed in the circumferential direction of the primary sun gear.

Compared with the prior art, the rope hoisting mechanism for a crane according to the present invention has the following advantages:

1. In the rope hoisting mechanism for a crane according to the present invention, a differential planetary gear train and a brake are arranged inside the drum, and the primary planetary gear and the secondary planetary gear of the differential planetary gear Tooth meshing transmission adopts the drum design integrated with the drum and the ring gear, and has a built-in two-stage differential gear train structure. The planetary carrier adopts an integral pallet type planetary carrier, which has a small axial dimension and a compact structure under the same transmission ratio. The overall size of the rope winch is greatly reduced.

2. In the rope-threading winch mechanism for a crane according to the present invention, the internal teeth of the spline sleeve mesh with the first-stage sun gear of the differential planetary gear system, and the first-stage sun gear meshes with at least three first-stage planetary gears; There are at least three second-level planetary gears for the gear meshing, the first-level planetary gear and the second-level planetary gear are meshed with the inner gear of the reel at the same time, and the differential gear train is used for transmission. ,high working efficiency.

3. In the rope hoisting mechanism for a crane according to the present invention, the frame is connected and fixed on the crane through a pin shaft, which is small in size and light in weight, and is easy to install on the vehicle.

4. In the rope hoisting mechanism for cranes according to the present invention, the output shaft of the hydraulic motor is provided with a spline sleeve, and the brake is a wet multi-disc brake, which is input by a hydraulic motor and through the structure of the wet multi-disc brake, which is convenient and accurate. Execute the process of retracting and releasing the rope of the rope winch mechanism, which is convenient for operation and control.

5. In the rope hoisting mechanism for a crane according to the present invention, the frame is provided with a rope clamp structure for limiting the wire rope, so as to avoid rope disorder during the rope retraction process of the mechanism itself.

The rope-threading winch mechanism for cranes of the present invention realizes the automation of the rope-threading process of the crane, avoids manual rope threading and rope pulling, improves the efficiency of hoisting operations, and is multi-purpose. It is not only suitable for threading work when installing and replacing steel wire ropes, but also for hoisting. During the jib luffing process, the tension of the hoisting wire rope can be avoided to avoid rope disorder in the hoisting winch mechanism.

Description of drawings

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a schematic diagram of the external structure of the present invention.

Fig. 2 is a schematic view along the direction A of Fig. 1 .

Fig. 3 is a sectional view of the present invention.

Fig. 4 is a structural schematic diagram of the rope presser of the present invention.

Among them: 1. Hydraulic motor, 2. Rack, 3. Reel, 4. Brake, 5. Differential planetary gear system, 6. Wire rope, 7. Rope presser, 8. Extension spring, 9. Spline sleeve, 10, primary sun gear, 11, primary planetary gear, 12, primary planet carrier, 13, trunnion, 14, secondary sun gear, 15, secondary planetary gear, 16, secondary planet carrier, 17, pin Axle, 18, depression bar, 19, connecting rod, 20, external briquetting block, 21, internal briquetting block, 22, long cylinder, 23, short cylinder.

detailed description

As shown in Figures 1 to 4, a rope-threading hoisting mechanism for a crane includes: a hydraulic motor 1, a frame 2, a reel 3, a brake 4, a differential planetary gear train 5, a steel wire rope 6 and a rope presser 7; There are four pin holes on the frame 2, which are combined with the side wall plate of the designated part of the crane, so that the frame 2 is fixed on the crane through the pin connection. The lower half of Frame 2 has a bent plate for overall strength and rigidity.

The reel 3 is arranged in the frame 2 to rotate and connect, and the reel 3 is provided with a differential planetary gear train 5 and a brake 4 inside, and the hydraulic motor 1 is transmitted with the reel 3 through the differential planetary gear train 5 Connection; the brake 4 is a wet multi-plate brake, which is used to control the start and stop of the rotation of the reel 3 .

As shown in Figure 3, the differential planetary gear system 5 is a two-stage closed differential planetary gear system for deceleration and torque increase, and the differential planetary gear system 5 includes: a primary sun gear 10, a The first-stage planetary gear 11, the first-stage planetary carrier 12, the second-stage sun gear 14, the second-stage planetary wheel 15 and the second-stage planetary carrier 16; the output shaft of the hydraulic motor 1 is provided with a spline sleeve 9, and the spline sleeve The internal teeth of 9 mesh with the primary sun gear 10 of the differential planetary gear train 5, and the primary sun gear 10 meshes with at least three primary planetary gears 11; the secondary sun gear 14 meshes with at least three The secondary planetary gear 15, the primary planetary gear 11 and the secondary planetary gear 15 are simultaneously engaged with the internal teeth of the reel 3 for transmission.

The hydraulic motor 1 is connected to the first-stage sun gear 10 through the spline sleeve 9 to input power, and through meshing with the first-stage planetary gear 11, it is output by the first-stage planet carrier 12 and the reel 3; the first-stage planet carrier 12 is transmitted to the second-stage sun gear. The wheel 14 is output by the reel 3 by meshing with the secondary planetary wheel 15 . Because the secondary planet carrier 16 is fixed, the handle is closed on the frame 2, so the reel 3 summarizes the outputs of all levels, and the overall output power.

The first-stage planetary gear 11 is arranged on the first-stage planetary carrier 12, and the first-stage planetary carrier 12 is engaged with the second-stage sun gear 14 for transmission through splines, and the second-stage planetary gear 15 is arranged on the second-stage planetary On the frame 16, the secondary planetary frame 16 is fixed on the frame 2, and a bearing is arranged between the outer wall of the secondary planetary frame 16 and the inner wall of the reel 3; the inner frame of the reel 3 is provided with a trunnion 13. A bearing is provided between the outer wall of the trunnion 13 and the frame 2, the reel 3 is placed in the frame 2, and the two ends are respectively fixed by the secondary planet carrier 15 and the trunnion 13 to ensure stable operation.

The first-stage planetary gears 11 and the second-stage planetary gears 15 are respectively uniformly distributed with 3 to 7 in the circumferential direction, and the number of planetary gears arranged is preferably 3, 4 or 5 under the premise of satisfying the strength.

The brake 4 includes a piston, a spring and a friction plate; the spring is arranged inside the piston, the friction plate is arranged at the bottom of the piston, and the friction plate includes an inner friction plate and an outer friction plate; the inner friction plate is the same as The outer teeth of the spline sleeve 9 are engaged, and the outer friction plates are engaged with the inner teeth of the secondary planet carrier 16 .

The outer wall of the reel 3 is wound with a wire rope 6 , and the frame 2 is provided with a rope clamp 7 for limiting the wire rope 6 . As shown in Figure 4, the rope presser 7 includes a tension spring 8, a pressing rod 18, a connecting rod 19, an outer pressing block 20, an inner pressing block 21, a long drum 22 and a short drum 23; There are two compression rods 18 arranged in parallel, and the roots of the two compression rods 18 are respectively rotatably connected with the frame 2 through pin shafts 17 .

The middle parts of the two compression rods 18 are fixedly connected by an intermediate rod 19, and the front ends of each of the compression rods 18 are fixed with an external compression block 20 and an internal compression block 21 by bolts, and the internal compression blocks 21 at the front ends of the two compression rods 18 are A long roller 22 for pressing the rope is provided on the outside, and a short roller 23 is respectively sleeved on the outer pressing blocks 20 at the front ends of the two pressing rods 18; Support, connect the outer pressing block 20 and the inner pressing block 21 with bolts, and the long roller 22 and two short rollers 23 are fixed on the pressing bar 18 .

One end of the extension spring 8 is fixed on the front end of the pressure rod 18, and the other end is fixed on the frame 2, so that the front end of the pressure rod 18 is pulled to the steel wire rope 6, so that the rope presser 7 is tightly pressed on the steel wire rope 6, as shown in Figure 2 Show.

The rope presser 7 is arranged on the other side of the rope outlet direction of the reel 3, that is, on the opposite side of the rope outlet direction. Due to the tension of the extension spring 8 on the pressure rod 18, the long drum 22 and the short drum 23 respectively With the outer briquetting block 20 and the inner briquetting block 21 as fixed shafts, they rotate relative to the steel wire rope, and rolling friction occurs to avoid rope disorder.

Described pressing bar 18 is designed for broken line, and angle is relevant with the active force position of extension spring 8 and steel wire rope 6 and the fixing position of pressing bar 18.

When working, release the steel wire rope 6 steps: connect the hydraulic oil of the brake 4, and when the pressure reaches the set value, the brake 4 releases the brake.

When the hydraulic motor 1 rotates in the forward direction, the power is input through the first-stage sun gear 10, and through meshing with the first-stage planetary gear 11, the power is output by the first-stage planet carrier 12 and the reel 3; The power of the primary sun gear 14 is engaged with the secondary planetary gear 15, and the power is output by the reel 3.

Because the secondary planet carrier 16 is closed on the frame 2 and is fixed, so finally by the reel 3 by the output power, the reel 3 reversely rotates, and the wire rope 6 is released.

When the wire rope 6 is released to the required length, the brake 4 brakes, and the reel 3 stops rotating.

Step 6 of retracting the wire rope: the hydraulic motor 2 rotates in the opposite direction, the power is input through the first-stage sun gear 10, and through meshing with the first-stage planetary gear 11, the power is output by the first-stage planetary carrier 12 and the reel 3; then the first-stage planetary carrier 12 The power is transmitted to the secondary sun gear 14, and the power is output from the reel 3 through meshing with the secondary planetary gear 15.

Because the secondary planet carrier 16 is closed on the frame 2 and is fixed, so the power is finally output by the reel 3, and the reel 3 rotates in the forward direction, and the wire rope 6 is retracted.

Brake 4 brakes, and reel 3 stops rotating.

During the process of the reel 3 retracting and releasing the rope, the rope presser 7 always presses the steel wire rope 6 tightly.

Due to the very high requirements on the weight of the complete crane, the requirements on the weight of the rope hoisting mechanism are also very strict. The rope hoisting mechanism for cranes in the present invention uses a hinged way to fix the frame on the whole machine, and the planetary The gear box and the reel are integrated design, and the motor and brake control mechanism work, and the wire rope of the rope winch mechanism is retracted and unwound through the rope presser. The rope hoisting mechanism has the advantages of compact structure, light weight, small space occupation, and flexible installation. It adopts the hinged connection mode of the machine base, which not only realizes the automatic threading of the hoisting wire rope on the jib, but also avoids the occurrence of The phenomenon of tangled rope is a new type of rope hoisting mechanism that is safe, reliable, small in size and light in weight. It is not only convenient for random installation, but also greatly improves the efficiency of crane hoisting preparation operations.

The rope-threading winch mechanism for a crane according to the present invention is a device for a crane to thread or tension a hoisting wire rope. It can not only replace manual threading and replacement of hoisting wire ropes, but also meet the requirements of lightweight cranes, and can even avoid the problem of disordered ropes when retracting and releasing the ropes. Occupying a small space, it is easy to install and debug, and at the same time, it also improves the efficiency of crane hoisting preparation work, and reduces labor costs and expenses during installation and maintenance.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention Any equivalent replacement or change of the inventive concepts thereof shall fall within the protection scope of the present invention.

Claims (8)

1. a kind of crane wire rope handling hoisting mechanism, it is characterised in that including：It is hydraulic motor, frame, reel, brake, differential Planet circular system, steel wire rope and rope processing device；

Described reel is arranged at and connection is rotated in frame, and the reel is internally provided with differential planetary gear train and brake, institute Hydraulic motor is stated to be connected with reel by differential planetary gear train；

Described reel outer wall is wound with steel wire rope, and the rope processing device for spacing steel wire rope is provided with the frame.

2. crane according to claim 1 wire rope handling hoisting mechanism, it is characterised in that：

Described differential planetary gear train includes：One-level sun gear, primary planet wheel, primary planet carrier, secondary solar gear, two grades of rows Star-wheel and secondary planet frame；

Be provided with spline housing on the output shaft of the hydraulic motor, the internal tooth of the spline housing with differential planetary gear train one-level too Sun wheel engagement, the one-level sun gear is engaged with least three primary planet wheels；

Described secondary solar gear is engaged with least three secondary planet wheels, and described primary planet wheel and secondary planet wheel are simultaneously With the internal tooth engaged transmission of reel.

3. crane according to claim 2 wire rope handling hoisting mechanism, it is characterised in that：

Described primary planet wheel is arranged on primary planet carrier, and described primary planet carrier is nibbled by spline with secondary solar gear Transmission is closed, described secondary planet wheel is arranged on secondary planet frame, and the secondary planet frame is fixed in frame, described two grades Planet carrier outer wall is with being provided with bearing between mandrel interior wall；

It is provided with gudgeon on the support body of reel inside, the gudgeon outer wall is with being provided with bearing between frame.

4. the crane wire rope handling hoisting mechanism according to claim 1,2 or 3, it is characterised in that：

The rope processing device includes extension spring, depression bar, connecting rod, outside briquetting, internal briquetting, roller long and short roller；

There are two depression bars be arrangeding in parallel, the depression bar root described in two is turned by bearing pin with frame respectively on the rope processing device Dynamic connection, two depression bar middle parts are fixedly connected by intermediate bar, and each described depression bar front end has been bolted outside Briquetting and internal briquetting, the inside briquetting outside of two depression bar front ends are provided with the roller long for pressing rope, described in two The outside pressure of depression bar front end is arranged with a short roller respectively；

Depression bar front end is fixed in described extension spring one end, and the other end is fixed in frame, depression bar front end is pulled to steel wire rope.

5. the crane wire rope handling hoisting mechanism according to claim 1,2 or 3, it is characterised in that：

Described brake is wet multi-plate brake.

6. the crane wire rope handling hoisting mechanism according to claim 1,2 or 3, it is characterised in that：

Described frame is connected and fixed on crane by bearing pin.

7. the wire rope handling hoisting mechanism of the crane according to Claims 2 or 3, it is characterised in that：

The brake includes piston, spring and friction plate；

Described spring is arranged at internal piston, and the friction plate is arranged at piston base, and described friction plate includes interior friction Piece and outside friction disc；

The inner attrition piece is engaged with spline housing external tooth, and the outside friction disc is engaged with secondary planet frame internal tooth.

8. the wire rope handling hoisting mechanism of the crane according to Claims 2 or 3, it is characterised in that：

Described primary planet wheel and secondary planet wheel is evenly equipped with 3~7 respectively in the circumferencial direction of one-level sun gear.