Oiling structure for inner gear ring of crown block winding drum

Abstract

The utility model relates to the technical field of crown block winches, and discloses a crown block winding drum inner gear ring oiling structure which comprises an oil injection pipe which penetrates in the radial direction and is fixedly connected to a working drum of a crown block winding drum, a gear ring of the crown block winding drum is provided with an oil injection hole in the radial direction in a penetrating mode, and the inner end of the oil injection pipe is inserted into the oil injection hole. The inner end of the oil filling pipe is in sealing fit with the gear ring, and the portion, close to teeth of the inner gear ring, of the outer face of the end plate of the crown block winding drum is communicated with the inner end of the oil filling hole. Lubricating grease can be directly injected into teeth of the inner gear ring through the oil injection pipe, and the lubricating grease is gradually and uniformly smeared on the inner gear ring under the driving of a driving gear of the speed reducer. Original waste lubricating grease in the inner gear ring can be discharged or pumped out through the oil filling pipe, so that the winding drum and the speed reducer do not need to be disassembled when the lubricating grease is filled or replaced in the inner gear ring, and the filling or replacing efficiency of the lubricating grease can be greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of crown block hoist, especially to a crown block drum inner gear ring oiling structure. BACKGROUND

[0002] The hoist of the crown block drives the lifting hook to lift, and then lifts or lowers the heavy object. The hoist comprises a drum and a speed reducer. As shown in Figure 1 、 Figure 2 and 5 , the drum of the crown block comprises a cylindrical working drum 6, and the steel wire rope is wound on the working drum 6. An end plate 10 is welded in the working drum 6 near the end. The outer side of the end plate 10 protrudes outward to form a ring near the working drum 6, and an annular undercut groove 11 is first machined in the inner circle of the ring, and then the gear teeth are machined by using a gear shaping machine to form an inner gear ring 7. The inner gear ring 7 and the working drum 6 are annular grooves, the inner gear ring 7 is engaged with the driving gear 9 of the speed reducer, and the outer end surface of the inner gear ring 7 is sealingly connected with the speed reducer, so that a closed space is formed inside the inner gear ring 7. A certain amount of lubricating grease is injected into the closed space when it is delivered, which is used for lubricating the inner gear ring 7 and the driving gear 9.

[0003] After the crown block runs for a period of time, it needs to be overhauled and maintained, and the lubricating grease needs to be replaced. The crown block drum and the speed reducer need to be disassembled and separated every time the lubricating grease is replaced, so the disassembly process is too long and time-consuming and laborious, and can only be completed during the period when the crown block is parked for a long time.

[0004] The patent with publication number CN117228567A discloses a super-lifting hoist speed reducer for a crane, comprising a drum, and three planetary gear transmissions are arranged in the drum cavity. The output stage uses a transmission structure with large torque transmission, the input stage and the intermediate stage use a transmission structure with small torque transmission, the input stage, the intermediate stage and the rear support shaft can share part of the axial installation space through layout design, the space requirement in the axial direction is further reduced, a small displacement motor can be used to match a larger speed ratio in the limited assembly space of the crane boom to meet the super-lifting function requirement of the crane. However, the gears and bearings required for transmission are located inside the drum, so if the lubricating grease needs to be replaced, the transmission part needs to be disassembled from the drum, which makes the lubricating grease injection and replacement time-consuming and laborious. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the utility model is to provide a crown block drum inner gear ring oiling structure to solve the problem that the crown block drum and the speed reducer need to be disassembled when the lubricating grease on the crown block drum inner gear ring is replaced, resulting in time-consuming and laborious lubricating grease injection and replacement.

[0006] To solve the above technical problems, the utility model adopts the technical scheme of:

[0007] The oiling structure of the inner gear ring of the crown block drum comprises an oil injection pipe fixedly connected to the working drum of the crown block drum in the radial direction, and an oil injection hole is arranged in the inner gear ring of the crown block drum in the radial direction at a position corresponding to the end plate of the crown block drum, the inner end of the oil injection pipe is inserted into the oil injection hole, the inner end of the oil injection pipe is in sealing cooperation with the inner gear ring, and the position of the end plate of the crown block drum outside and close to the teeth of the inner gear ring is in communication with the inner end of the oil injection hole.

[0008] Further, a pit is arranged on the outer surface of the end plate of the crown block drum, the pit is close to the teeth of the inner gear ring, the pit is in communication with the inner end of the oil injection hole, and the undercut groove close to the side of the end plate of the inner gear ring is in communication with the pit.

[0009] Further, a plug cap is arranged outside the working drum and detachably connected to the outer end of the oil injection pipe.

[0010] Further, an oil injection device is arranged outside the working drum and detachably connected to the outer end of the oil injection pipe, the oil injection device comprises a connecting pipe detachably connected to the outer end of the oil injection pipe, a piston fixedly connected to the outer end of the connecting pipe and an oil injection box covering the piston, the connecting pipe is coaxial with the oil injection pipe, the piston is perpendicular to the connecting pipe, the piston and the connecting pipe are both in sliding connection with the oil injection box, the piston and the connecting pipe are both in sealing cooperation with the oil injection box, a closed oil chamber is arranged in the oil injection box, the oil chamber is located on the side of the piston close to the working drum, and an oil passing hole is arranged on the side wall of the connecting pipe close to the piston and in communication with the oil chamber and the inner hole of the connecting pipe.

[0011] Further, the oil injection box comprises an oil storage box with an opening facing the working drum and a box cover screwed on the opening of the oil storage box, the piston is in sliding connection with the oil storage box, the piston is in sealing cooperation with the oil storage box, the connecting pipe is in sliding connection with the box cover in penetration, the connecting pipe is in sealing cooperation with the box cover, the oil chamber is located in the oil storage box, and the oil chamber is located between the box cover and the piston.

[0012] Further, the oil injection pipe is in threaded connection with the working drum, the oil injection hole is in stepped shape with a large radial outer side, the inner end of the oil injection pipe is inserted into the outer side of the oil injection hole, and the oil injection pipe is in sealing connection with the inner gear ring by means of a sealing ring arranged at the stepped position of the oil injection hole.

[0013] Further, symmetrical planes are arranged on the outer wall close to the outer end of the oil injection pipe.

[0014] The positive effect of the utility model is:

[0015] The utility model discloses a transformation can be carried out to the existing crown block drum, and the working cylinder of crown block drum is drilled and tappet, and the oil hole is drilled on the inner gear ring, and the oil injection pipe is installed. Through the oil injection pipe, the lubricating grease can be directly filled to the tooth of inner gear ring, and under the drive of the driving gear of speed reducer, the lubricating grease is gradually and evenly applied to the inner gear ring. The original waste lubricating grease in the inner gear ring can be discharged or extracted through the oil injection pipe, so that when filling or replacing the lubricating grease in the inner gear ring, the drum and speed reducer do not need to be disassembled, and the efficiency of filling or replacing the lubricating grease can be greatly improved. The utility model also has an oil injection device, when the drum rotates, the oil injection device is driven to rotate around the center of the drum, under the action of centrifugal force, the oil storage box and box cover of the oil injection device are radially extruded to the lubricating grease stored in the oil chamber in the oil storage box, so that when the drum rotates, the lubricating grease is gradually added to the inner gear ring, and the lubricating grease is evenly applied to the teeth of the inner gear ring and the driving gear along with the rotation of the inner gear ring, preventing the lubricating grease from gathering on the inner gear ring and causing the lubricating grease to be difficult to evenly apply to the teeth of the inner gear ring and the driving gear. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the side view of example 1;

[0017] Figure 2 is Figure 1 the sectional view of A-A part in example 1;

[0018] Figure 3 is Figure 2 the partial enlarged view of II part in example 1;

[0019] Figure 4 is the side view of example 2;

[0020] Figure 5 is Figure 4 the partial enlarged view of I part in example 2;

[0021] In the figure:

[0022] 1, cap; 2, oil injection pipe; 3, sealing ring; 4, oil injection hole; 5, recess; 6, working cylinder; 7, inner gear ring; 8, annular groove; 9, driving gear; 10, end plate; 11, empty slot; 12, connecting pipe; 13, box cover; 14, oil storage box; 15, piston; 16, oil passing hole; 17, oil chamber. DETAILED DESCRIPTION

[0023] Example 1

[0024] As Figures 1 to 3As shown in the figure, the oiling structure of the inner ring gear 7 of the crown sheave comprises an oil injection pipe 2 fixedly connected to the working cylinder 6 of the crown sheave in the radial direction, and the inner ring gear 7 of the crown sheave is provided with an oil injection hole 4 in the radial direction at the position corresponding to the end plate 10 of the crown sheave, the inner end of the oil injection pipe 2 is inserted into the oil injection hole 4 and is in sealing cooperation with the inner ring gear 7, the position of the end plate 10 of the crown sheave close to the teeth of the inner ring gear 7 is in communication with the inner end of the oil injection hole 4, and the oil injection pipe 2 passes through the annular groove 8.

[0025] The inner end of the oil injection hole 4 extends to the center of the end plate 10 and passes through the inner ring gear 7 in the radial direction. The axis of the oil injection hole 4 coincides with the outer end surface of the end plate 10, so that the inner end of the oil injection hole 4 forms a pit 5 close to the teeth of the inner ring gear 7, and the pit 5 is in communication with the annular undercut groove 11 at the root of the inner ring gear 7.

[0026] The oil injection pipe 2 is made of seamless copper pipe or stainless steel pipe. The oil injection pipe 2 is connected to the working cylinder 6 in the penetrating thread, the oil injection hole 4 is stepped outward in the radial direction, the inner end of the oil injection pipe 2 is inserted into the outer position of the oil injection hole 4, and the oil injection hole 4 is provided with a sealing ring 3 at the stepped position. After the oil injection pipe 2 is tightened, the inner end of the oil injection pipe 2 abuts against the sealing ring 3 and presses the sealing ring 3, so as to realize the sealing connection between the oil injection pipe 2 and the inner ring gear 7.

[0027] The working cylinder 6 is provided with a circular plug 1 screwed to the outer end of the oil injection pipe 2, and the outer circle 1 of the plug 1 is provided with knurling.

[0028] The plug 1 is periodically unscrewed, and the lubricating grease is injected into the oil injection pipe 2. The lubricating grease is injected into the teeth of the inner ring gear 11 from the pit 5 after passing through the oil injection pipe 2 and the oil injection hole 4, and then the plug 1 is screwed. Under the driving of the driving gear 9, the lubricating grease is gradually diffused to the teeth of the inner ring gear 11 and the driving gear 9 when the inner ring gear 11 rotates.

[0029] After the lubricating grease is injected for three to five times, the hoist is operated while hot after the operation of the crown is completed, the working cylinder 6 is rotated, and the oil injection pipe 2 is downward. Because the hot lubricating grease has a certain flowability, the waste lubricating grease at the bottom of the inner ring gear 11 can be discharged after the plug 1 is unscrewed. If the lubricating grease flows slowly, the oil injection pipe 2 is connected to a suction pipe, and the waste lubricating grease accumulated at the bottom of the inner ring gear 11 is sucked out by a vacuum device, and then new lubricating grease is injected again to prevent the waste lubricating grease from accumulating too much in the inner ring gear 11, which causes the inner ring gear 11 and the driving gear 9 to overheat or wear. The utility model does not need to disassemble the crown and the speed reducer when the lubricating grease is injected or replaced in the inner ring gear 11, which can greatly improve the efficiency of the injection or replacement of the lubricating grease.

[0030] In actual operation, the existing head sheave can be modified, different diameter drill bit is used to drill holes on the working drum 6 and the inner gear ring 7, then the holes on the working drum 6 are threaded, the sealing ring 3 is put in the oil injection hole 4, and the oil injection pipe 2 is screwed on. The oil injection pipe 2 can be provided with two along the circumferential direction of the working drum 6 to improve the uniformity of the lubricating grease filling.

[0031] Embodiment 2

[0032] The difference between this embodiment and embodiment 1 is that:

[0033] The plug cover 1 is no longer provided. The working drum 6 is externally provided with an oil injection device which is detachably connected to the outer end of the oil injection pipe 2. The oil injection device comprises a connecting pipe 12 which is threadedly connected to the outer end of the oil injection pipe 2, a disc-shaped piston 15 which is fixedly connected to the outer end of the connecting pipe 12, and an oil injection box which covers the piston 15. The connecting pipe 12 is coaxial with the oil injection pipe 2, the piston 15 is perpendicular to the connecting pipe 12, and the piston 15 and the connecting pipe 12 are both in sliding connection with the oil injection box. The piston 15 and the connecting pipe 12 are both in sealing fit with the oil injection box. The oil injection box is internally provided with a closed oil chamber 17 which is located on the side of the piston 15 close to the working drum 6, and the oil chamber 17 is filled with lubricating grease.

[0034] The oil injection box comprises a barrel-shaped oil storage box 14 which is open towards the working drum 6, and a box cover 13 which is screwed on the inner end of the oil storage box 14. The piston 15 is in sliding connection with the oil storage box 14, and the piston 15 and the oil storage box 14 are in sealing fit through two O-rings. The connecting pipe 12 is in penetrating sliding connection with the box cover 13, and the connecting pipe 12 and the box cover 13 are in sealing fit through an O-ring. The oil chamber 17 is located in the oil storage box 14, and the oil chamber 17 is located between the box cover 13 and the piston 15. In actual production, the oil storage box 14, the box cover 13, the piston 15 and the connecting pipe 12 are made of copper or stainless steel. After the box cover 13 is unscrewed, the oil chamber 17 can be filled with lubricating grease.

[0035] When the hoist is in operation, the working drum 6 rotates, thereby driving the oil injection device to rotate around the center of the working drum 6. Under the action of centrifugal force, the oil storage box 14 and the box cover 13 extrude the lubricating grease in the oil chamber 17 radially outward, so that the pressure of the lubricating grease is sufficient to enter the connecting pipe 12 through the oil passing holes 16, and then enter the inner gear ring 11 through the oil injection pipe 2. Thus, when the working drum 6 rotates, the lubricating grease can be gradually added to the inner gear ring 7, and evenly coated on the inner gear ring 7 and the teeth of the driving gear 9, thereby preventing the lubricating grease from being accumulated on the inner gear ring 7 due to excessive filling, and thus making it difficult to evenly coat the lubricating grease on the inner gear ring 7 and the teeth of the driving gear 9.

[0036] Therefore, the inner toothing 7 can be filled with lubricating grease at a high speed by periodically replacing the oil filling device.

[0037] Example 3

[0038] The difference between this example and example 2 is that:

[0039] The oil filling pipe 2 is milled flat on both sides near the outer end, and the connecting pipe 12 is milled flat on both sides near the end connected to the oil filling pipe 2, so that symmetrical planes are formed on the outer wall of the oil filling pipe 2 and the outer wall of the connecting pipe 12, respectively, to facilitate tightening of the oil filling pipe 2 and the connecting pipe 12 by using a wrench.

[0040] The above-described examples are more detailed and specific, express the preferred embodiments of the present application, and are only used to illustrate the technical ideas and characteristics of the present application. The purpose is to enable those skilled in the art to understand the content of the present application and implement it accordingly, but it is not limited to the present application. The patent range of the present application cannot be limited to the present examples, that is, any equivalent changes or modifications made according to the spirit disclosed by the present application, without departing from the structure of the present application, the internal partial improvement of the system and the change between subsystems, transformation, etc. are still within the patent range of the present application.

Claims

1. A crown block hoisting drum ring gear oiling structure, characterized in that, The oil injection pipe (2) is fixedly connected to the working drum (6) of the crown block drum, the inner ring (7) of the crown block drum is provided with an oil injection hole (4) at a position corresponding to the end plate (10) of the crown block drum, the inner end of the oil injection pipe (2) is inserted into the oil injection hole (4), the inner end of the oil injection pipe (2) is in sealing cooperation with the inner ring (7), and the position of the end plate (10) of the crown block drum close to the teeth of the inner ring (7) is in communication with the inner end of the oil injection hole (4).

2. The oiling structure of the inner ring gear of a crown block drum according to claim 1, wherein, The end plate (10) of the crown block drum is provided with a pit (5) close to the teeth of the inner ring (7), the pit (5) is in communication with the inner end of the oil injection hole (4), and the undercut groove (11) close to the side of the inner ring (7) is in communication with the pit (5).

3. The oiling structure of the inner ring gear of a head drum according to claim 1, wherein, The working drum (6) is provided with a plug (1) which is detachably connected to the outer end of the oil injection pipe (2).

4. The oiling structure of the inner ring gear of a head drum according to claim 1, wherein, The working drum (6) is provided with an oil injection device which is detachably connected to the outer end of the oil injection pipe (2), the oil injection device comprises a connecting pipe (12) which is detachably connected to the outer end of the oil injection pipe (2), a piston (15) which is fixedly connected to the outer end of the connecting pipe (12), and an oil injection box which covers the piston (15), the connecting pipe (12) is coaxial with the oil injection pipe (2), the piston (15) is perpendicular to the connecting pipe (12), the piston (15) and the connecting pipe (12) are both in sliding connection with the oil injection box, the piston (15) and the connecting pipe (12) are both in sealing cooperation with the oil injection box, the oil injection box is provided with a closed oil chamber (17), the oil chamber (17) is located on the side of the piston (15) close to the working drum (6), and the connecting pipe (12) is provided with an oil passing hole (16) on the side wall of the end close to the piston (15), the oil passing hole (16) is in communication with the inner hole of the connecting pipe (12) and the oil chamber (17).

5. The oiling structure of the inner ring gear of a crown block drum according to claim 4, characterized in that, The oil injection box comprises an oil storage box (14) with an opening facing the working drum (6) and a box cover (13) screwed on the opening of the oil storage box (14), the piston (15) is in sliding connection with the oil storage box (14), the piston (15) is in sealing cooperation with the oil storage box (14), the connecting pipe (12) is in penetrating sliding connection with the box cover (13), the connecting pipe (12) is in sealing cooperation with the box cover (13), the oil chamber (17) is located in the oil storage box (14), and the oil chamber (17) is located between the box cover (13) and the piston (15).

6. The oiling structure of the inner ring gear of a crown block drum according to claim 1, wherein, The oil injection pipe (2) is in threaded connection with the working drum (6), the oil injection hole (4) is in stepped shape with a large outer diameter, the inner end of the oil injection pipe (2) is inserted into the position close to the outer part of the oil injection hole (4), and the inner end of the oil injection pipe (2) is in sealing connection with the inner ring (7) by means of the sealing ring (3) arranged at the stepped position of the oil injection hole (4).

7. The oiling structure of the inner ring gear of a crown block drum according to claim 6, characterized in that, The outer wall close to the outer end of the oil injection pipe (2) is provided with symmetrical planes.

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