CN206816664U - A kind of grab bucket articulated structure of bridge grabbing crane - Google Patents

Abstract

The utility model discloses a kind of grab bucket articulated structure of bridge grabbing crane, including bearing pin, axle sleeve and the earhole being arranged on skip body；Coaxial at the earhole to be installed with the axle sleeve, the axle sleeve is rotatably sleeved on the bearing pin；It is characterized in that：The axle sleeve includes overall cylindrical structure and the inner sleeve and overcoat of coaxial setting, the inner sleeve are made by nylon material, and the overcoat is made by Steel material；The medial surface of the inner sleeve is rotatably sleeved on the bearing pin, and the medial surface of the overcoat is socketed on the lateral surface of the inner sleeve, and the medial surface of the lateral surface of the overcoat and the earhole is fixedly linked.The grab bucket articulated structure of bridge grabbing crane of the present utility model has simple and reasonable, can reduce the abrasion of grab bucket each hinged place, the advantages of extending bearing pin service life.

Description

A kind of grab bucket articulated structure of bridge grabbing crane

Technical field

The utility model belongs to bridge grabbing crane field, and in particular to a kind of grab bucket of bridge grabbing crane is hinged Structure.

Background technology

Bridge grabbing crane is the conventional handling crane gear of metallurgical mine industry, and grab bucket is on bridge grabbing crane One of mostly important executing agency.

Notification number is CN2020449719 in the prior art, and the patent of entitled " a kind of grab bucket for nickel minerals crane " is A kind of grab bucket is shown, the grab bucket（Referring to shown in this specification accompanying drawing 1）Including bucket body 1, strut 3, through beam 5, under hold Beam pulley 6, deflector roll assembly 7, deck beam pulley 8, deck beam 10, equalizer bar 11, opening and closing rope 12, support cable 13 and increase-volume plate 14；Wherein, the bucket body 1 includes retainer plate 1-1, connecting plate 1-2 and main board 1-3；The main board 1-3 passes through bucket body pin 2 The lower end of strut 3 is hinged on, is hinged on by through beam pin 4 on through beam 5.

But the above-mentioned grab bucket for nickel minerals crane has following weak point：

1st, the structure of each hinged place of grab bucket is to pass through liner steel bushing by the earhole set in grab bucket（4-1）Set It is connected on hinge（Referring to described in Figure of description 1）.But bridge grabbing crane grab bucket working condition used is severe, work Often easily enter grab bucket hinged place with the media such as mineral, silt, sewage, various media, cause the bearing pin and liner of hinged place Abrasive wear occurs between steel bushing, the degree of wear of aggravation bearing pin and liner steel bushing, causes grab bucket to use failure（Because bearing pin is with The abrasion of lined steel set and cause grab bucket using the situation of failure to account for more than 40%）.Use of the grab bucket in metallurgical mine industry Rank is high, and normal produces day operating rate is up to more than 80%.And after if grab bucket is broken down, maintenance time length, it can have a strong impact on just Often production.

2nd, at the same time, above-mentioned medium easily blocks the oil leab of each hinged place of grab bucket so that the hinged place can not It is lubricated maintenance.

Based on this, applicant considers that design is a kind of simple and reasonable, can reduce grabbing for each hinged place abrasion of grab bucket The grab bucket articulated structure of bucket bridge crane.

Utility model content

For above-mentioned the deficiencies in the prior art, technical problem to be solved in the utility model is：How a kind of knot is provided Structure advantages of simple, the grab bucket articulated structure of the bridge grabbing crane for each hinged place abrasion of grabbing bucket can be reduced.

In order to solve the above-mentioned technical problem, the utility model employs following technical scheme：

A kind of grab bucket articulated structure of bridge grabbing crane, including bearing pin, axle sleeve and the ear being arranged on skip body Hole；Coaxial at the earhole to be installed with the axle sleeve, the axle sleeve is rotatably sleeved on the bearing pin；Its feature It is：The axle sleeve includes overall cylindrical structure and the inner sleeve and overcoat of coaxial setting, and the inner sleeve is by nylon material Material is made, and the overcoat is made by Steel material；The medial surface of the inner sleeve is rotatably sleeved on the bearing pin, the overcoat Medial surface be socketed on the lateral surface of the inner sleeve, the medial surface of the lateral surface of the overcoat and the earhole is fixedly linked.

After the grab bucket articulated structure of bridge grabbing crane of the present utility model, you can pass through the nylon material of inner sleeve Characteristic come obtain can self-lubricating, coefficient of friction is low, good toughness, can compensate for the advantageous effects of alignment error.Tool statistics：Change Liner steel bushing average life is 30 days before making, and average life is 240 day after using above-mentioned axle sleeve structure.It is same with this When, the degree of wear on bearing pin surface also reduces, and greatly extends service life.

Further, the axle sleeve also includes keyway and connecting key；The medial surface of the overcoat and the lateral surface of the inner sleeve Upper common depression is formed with the keyway, and the connecting key is plugged in the keyway.

The structure of above-mentioned keyway and connecting key, is not only convenient for machine-shaping, additionally it is possible to effectively prevents between inner sleeve and overcoat Relative rotation or disengaging so that the structure of axle sleeve can be reliability and durability.

Further, the axle sleeve also includes back-up ring, the overall cylindrical structure of the back-up ring；Outside the end face of the inner sleeve Lateral edges depression is fixed at the step formed with a circle step, the back-up ring socket.

The setting of above-mentioned back-up ring, can form spacing to inner sleeve, effectively prevent inner sleeve from deviating from from overcoat, lift shaft noose The reliability of structure.

Further, the back-up ring is made by Steel material, and is between the medial surface of the outside of the back-up ring and the overcoat It is threadedly coupled or is weldingly connected.

Above-mentioned back-up ring has the advantages of simple in construction, easy to process, can not only lift the assembling speed of back-up ring, also causes The dismounting of back-up ring is more convenient, consequently facilitating internally set is changed at any time.

Further, the radial thickness of the inner sleeve is 90-100 millimeters.

So, can not only ensure that stress is more preferable with the inner sleeve of above-mentioned parameter, and inner sleeve endoporus because of mill Damage and being capable of effective compensation after becoming big.

Further, the kind of the nylon material is PA66.

Polyamide, English name polyamide, abbreviation PA are commonly called as nylon (Nylon), and it is macromolecular main chain The general name of high polymer containing amide group in repeat unit.

PA66 is one in all multi items of nylon, and PA66 hardness is harder l2% than PA6, plasticity and good toughness, Shock resistance is excellent, particularly suitable to be used under metallurgical mine industry working condition.

Further, the grab bucket articulated structure of bridge grabbing crane also includes abrasionproof cushion block, and the abrasionproof cushion block is in integrally Round pie structure, and the abrasionproof cushion block is made by nylon material and is used to be sleeved on the bearing pin.

Above-mentioned abrasionproof cushion block when in use, for the gap location being sleeved between bearing pin Upper shaft sleeve and axle sleeve, or, suit Gap location between axle sleeve and pin roll end face, it so can not only effectively reduce the friction of end face of shaft bush.

Further, the surface of the bearing pin also has wear-resistant protective layer, and the wear-resistant protective layer is made by nylon material.

So, above-mentioned wear-resistant protective layer can play a part of protecting the surface of bearing pin, effectively prevent the table of bearing pin The abrasion in face.

Brief description of the drawings

Fig. 1 is CN2020449719 for notification number in the prior art, entitled " a kind of grab bucket for nickel minerals crane " Structural representation.

Fig. 2 is the structural representation of the grab bucket articulated structure of existing bridge grabbing crane.

Fig. 3 is the structural representation of the grab bucket articulated structure of bridge grabbing crane of the present utility model.

Fig. 4 be bridge grabbing crane of the present utility model grab bucket articulated structure in inner sleeve structural representation.

Fig. 5 is the sectional view of inner sleeve in Fig. 4.

Fig. 6 is a kind of dimensional structure diagram for employing grab bucket of the present utility model.

Fig. 7 is enlarged drawing at A in Fig. 6.

Fig. 8 is enlarged drawing at B in Fig. 6.

Fig. 3 marked into Fig. 8 for：

1 bearing pin；

Axle sleeve：20 inner sleeves, 21 overcoats, 22 keyways, 23 connecting keys, 24 back-up rings；

3 skip bodies,

4 abrasionproof cushion blocks.

Embodiment

The utility model is described in further detail below in conjunction with the accompanying drawings.Wherein, for description using it is all as above, Under, the exemplary term such as left and right, it is therefore intended that help reader to understand, without being intended for limiting.

When it is implemented, as shown in Figures 3 to 8, a kind of grab bucket articulated structure of bridge grabbing crane, including bearing pin 1, Axle sleeve and the earhole being arranged on skip body 3；Coaxial at the earhole to be installed with the axle sleeve, the axle sleeve can turn It is socketed in dynamicly on the bearing pin 1；It is characterized in that：The axle sleeve includes overall cylindrical structure and coaxial setting Inner sleeve 20 and overcoat 21, the inner sleeve 20 are made by nylon material, and the overcoat 21 is made by Steel material；The inner sleeve 20 it is interior Side is rotatably sleeved on the bearing pin 1, and the medial surface of the overcoat 21 is socketed on the lateral surface of the inner sleeve 20, institute The medial surface for stating the lateral surface and the earhole of overcoat 21 is fixedly linked.

It is to be weldingly connected during implementation, between overcoat 21 and earhole.

After the grab bucket articulated structure of bridge grabbing crane of the present utility model, you can pass through the nylon material of inner sleeve 20 The characteristic of material come obtain can self-lubricating, coefficient of friction is low, good toughness, can compensate for the advantageous effects of alignment error.Tool statistics： Liner steel bushing average life is 30 days before transformation, and average life is 240 day after using above-mentioned axle sleeve structure.It is same with this When, the degree of wear on the surface of bearing pin 1 also reduces, and greatly extends service life.

Wherein, the axle sleeve also includes keyway 22 and connecting key 23；The medial surface of the overcoat 21 and the inner sleeve 20 Common depression is formed with the keyway 22 on lateral surface, and the connecting key 23 is plugged in the keyway 22.

The structure of above-mentioned keyway 22 and connecting key 23, is not only convenient for machine-shaping, additionally it is possible to effectively prevent inner sleeve 20 with it is outer Relative rotation or disengaging between set 21 so that the structure of axle sleeve can be reliability and durability.

Wherein, the axle sleeve also includes back-up ring 24, the overall cylindrical structure of back-up ring 24；The end face of the inner sleeve 20 Outer ledge depression formed with a circle step, the back-up ring 24 is fixed by socket at the step.

The setting of above-mentioned back-up ring 24, can form spacing to inner sleeve 20, effectively prevent inner sleeve 20 from deviating from from overcoat 21, carry The reliability of lifting shaft nested structure.

Wherein, the back-up ring 24 is made by Steel material, and the medial surface of the outside of the back-up ring 24 and the overcoat 21 it Between for threaded connection or be weldingly connected.

Above-mentioned back-up ring 24 has the advantages of simple in construction, easy to process, can not only lift the assembling speed of back-up ring 24, So that the dismounting of back-up ring 24 is more convenient, consequently facilitating being changed at any time to inner sleeve 20.

Wherein, the radial thickness of the inner sleeve 20 is 90-100 millimeters.

So, can not only ensure that stress is more preferable with the inner sleeve of above-mentioned parameter, and inner sleeve endoporus because of mill Damage and being capable of effective compensation after becoming big.

Wherein, the kind of the nylon material is PA66.

Polyamide, English name polyamide, abbreviation PA are commonly called as nylon (Nylon), and it is macromolecular main chain The general name of high polymer containing amide group in repeat unit.

PA66 is one in all multi items of nylon, and PA66 hardness is harder l2% than PA6, plasticity and good toughness, Shock resistance is excellent, particularly suitable to be used under metallurgical mine industry working condition.

Wherein, the grab bucket articulated structure of above-mentioned bridge grabbing crane also includes abrasionproof cushion block 4（As shown in Figure 6 to 8）, The overall abrasionproof cushion block 4 is in round pie structure, and the abrasionproof cushion block 4 is made by nylon material and is used to be sleeved on the pin On axle 1.

Above-mentioned abrasionproof cushion block 4 when in use, for the gap location being sleeved between the Upper shaft sleeve of bearing pin 1 and axle sleeve, or, set Gap location between axle sleeve and the end face of bearing pin 1, so can not only effectively reduce the friction of end face of shaft bush.

The surface of the bearing pin 1 also has wear-resistant protective layer（Not shown in figure）, the wear-resistant protective layer is by nylon material It is made.So, above-mentioned wear-resistant protective layer can play a part of protecting the surface of bearing pin, effectively prevent the surface of bearing pin Abrasion.

It the above is only the utility model preferred embodiment, need to point out not departed from for those skilled in the art On the premise of the technical program, several modifications and improvements can also be made, the technical scheme of above-mentioned modification and improvement should be regarded equally For fall into this application claims scope.

Claims (8)

1. a kind of grab bucket articulated structure of bridge grabbing crane, including bearing pin, axle sleeve and the earhole being arranged on skip body； Coaxial at the earhole to be installed with the axle sleeve, the axle sleeve is rotatably sleeved on the bearing pin；Its feature exists In：The axle sleeve includes overall cylindrical structure and the inner sleeve and overcoat of coaxial setting, and the inner sleeve is by nylon material It is made, the overcoat is made by Steel material；The medial surface of the inner sleeve is rotatably sleeved on the bearing pin, the overcoat Medial surface is socketed on the lateral surface of the inner sleeve, and the medial surface of the lateral surface of the overcoat and the earhole is fixedly linked.

2. the grab bucket articulated structure of bridge grabbing crane according to claim 1, it is characterised in that：The axle sleeve also wraps Include keyway and connecting key；Common depression is formed with the keyway on the lateral surface of the medial surface of the overcoat and the inner sleeve, and The connecting key is plugged in the keyway.

3. the grab bucket articulated structure of bridge grabbing crane according to claim 1, it is characterised in that：The axle sleeve also wraps Include back-up ring, the overall cylindrical structure of the back-up ring；The outer ledge depression of the end face of the inner sleeve is formed with a circle step, institute Back-up ring socket is stated to be fixed at the step.

4. the grab bucket articulated structure of bridge grabbing crane according to claim 3, it is characterised in that：The back-up ring is by steel Material is made, and is to be threadedly coupled or be weldingly connected between the outside of the back-up ring and the medial surface of the overcoat.

5. the grab bucket articulated structure of bridge grabbing crane according to claim 1, it is characterised in that：The footpath of the inner sleeve It is 90-100 millimeters to thickness.

6. the grab bucket articulated structure of bridge grabbing crane according to claim 1, it is characterised in that：The nylon material Kind be PA66.

7. the grab bucket articulated structure of bridge grabbing crane according to claim 1, it is characterised in that：Also include anti-abrasion pad Block, the abrasionproof cushion block are in integrally round pie structure, and the abrasionproof cushion block is made by nylon material and is used to being sleeved on described On bearing pin.

8. the grab bucket articulated structure of bridge grabbing crane according to claim 1, it is characterised in that：The table of the bearing pin Face also has wear-resistant protective layer, and the wear-resistant protective layer is made by nylon material.