CN112109617A - Lifting seat of mining dump truck - Google Patents
Lifting seat of mining dump truck Download PDFInfo
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- CN112109617A CN112109617A CN202010938279.3A CN202010938279A CN112109617A CN 112109617 A CN112109617 A CN 112109617A CN 202010938279 A CN202010938279 A CN 202010938279A CN 112109617 A CN112109617 A CN 112109617A
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- lifting
- arc plate
- arc
- dump truck
- mining dump
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
- B60P1/04—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with a tipping movement of load-transporting element
- B60P1/16—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with a tipping movement of load-transporting element actuated by fluid-operated mechanisms
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- Transportation (AREA)
- Mechanical Engineering (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention provides a lifting seat of a mining dump truck, which comprises a left longitudinal beam and a right longitudinal beam which are arranged at the bottom of a carriage and the rear ends of which are hinged with the carriage, and a left lifting arc plate and a right lifting arc plate which are respectively and fixedly arranged at the bottoms of the left longitudinal beam and the right longitudinal beam, wherein the left lifting arc plate and the right lifting arc plate are of the same structure integrally formed by a whole steel plate, the bottoms of the left lifting arc plate and the right lifting arc plate are respectively and fixedly connected with the two ends of a middle pipe, the two ends of the middle pipe are respectively and fixedly provided with a lifting fixing seat, and a lifting fixing pin shaft for hinging a lifting oil cylinder is arranged in an axial inner hole of the lifting fixing seat. The lifting seat of the mining dump truck provided by the invention has the advantages of simple and light structure, capability of reducing abrupt change of the cross section of the longitudinal beam, removing stress concentration points and avoiding the occurrence of unbalanced load in the lifting process.
Description
Technical Field
The invention relates to the technical field of mining machinery, in particular to a lifting seat of a mining dump truck.
Background
At present, a mining dump truck is used as main transportation equipment for mining strip mines and is mainly used for transporting and dumping ores. The lifting support serves as a lower supporting point when the lifting oil cylinder works, and plays an important role in the working links of transferring, transporting, unloading and the like of the mining dump truck. Because the lifting support is used as a main working bearing part, various production enterprises often design the lifting support to be heavier, and generally adopt a box-type structure to be welded below the frame longitudinal beam. Because the lifting seat structure of the box-type structure has a large section and high rigidity, the section of the frame longitudinal beam is easy to generate sudden change at the position where the lifting seat is welded, and although various manufacturers adopt different means to reduce the influence of the sudden change of the section on the stress of the frame longitudinal beam as much as possible, the phenomenon that part of vehicles crack at the position still exists.
The existing lifting oil cylinder support structure of the mining dump truck has the advantages that the section mutation of a frame longitudinal beam at the position of a welding lifting seat is reduced, a box-type base structure is reduced, arc-shaped rib plates are respectively arranged on two sides of the box-type base structure along the direction of the longitudinal beam, the length of a line segment of the arc-shaped rib plate close to a rear articulated shaft, which is in contact with the longitudinal beam, is set to be larger than that of a line segment of the front side arc-shaped rib plate, which is in contact with the longitudinal beam, and an arc-shaped block is respectively arranged at the. Although the improved structure solves the problems that the whole quality of the lifting oil cylinder support is heavy and the welding line is easy to crack, the improved structure still has the following problems: the box-type seat body structure is still adopted, so that the weight is larger; the rigidity of the longitudinal beam at the straight edge position where the box-type base body is contacted with the longitudinal beam is still larger, and the stress is larger; the welding seam at the arc-shaped block is complex, and a new stress concentration point is generated; the problem of stress concentration still exists at four sharp points of a quadrilateral with which the box-type seat body is in contact with the longitudinal beam; the problem of unbalanced load of the inner surface and the outer surface of the box-type seat body still exists in the lifting process; the structure is more complicated, and manufacturing cost is higher.
Disclosure of Invention
The invention aims to solve the technical problem of providing a lifting seat of a mining dump truck, which has a simple and light structure, can reduce abrupt change of the cross section of a longitudinal beam, remove stress concentration points and avoid the occurrence of unbalanced load in the lifting process.
In order to solve the technical problem, the invention provides a lifting seat of a mining dump truck, which comprises a left longitudinal beam and a right longitudinal beam which are arranged at the bottom of a carriage and the rear ends of which are hinged with the carriage, and a left lifting arc plate and a right lifting arc plate which are respectively and fixedly arranged at the bottoms of the left longitudinal beam and the right longitudinal beam, wherein the left lifting arc plate and the right lifting arc plate are of the same structure integrally formed by a whole steel plate, the bottoms of the left lifting arc plate and the right lifting arc plate are respectively and fixedly connected with the two ends of a middle pipe, the two ends of the middle pipe are respectively and fixedly provided with a lifting fixing seat, and a lifting fixing pin shaft for hinging a lifting oil cylinder is arranged in an axial inner hole of the lifting fixing seat.
Further, the arc board is lifted including lifting the arc board on a left side and lifting the arc board on the right side with left longeron and right longeron fixed connection's topside respectively, and with well intermediate pipe fixed connection's bottom set up preceding transition cambered surface and back transition cambered surface between the topside with set up between the bottom, preceding transition cambered surface with connect through first hypotenuse between the tip before the topside, the back transition cambered surface with the tip passes through the second hypotenuse and connects behind the topside.
Further, the included angle between the top edge and the first bevel edge is 15-35 degrees, the included angle between the top edge and the second bevel edge is 15-35 degrees, and the radius R of the transition fillet of the front transition cambered surface and the rear transition cambered surface is 300-800 mm.
Further, the thickness of the left lifting arc plate and the right lifting arc plate is 16-30 mm.
Further, the top edge of the left lifting arc plate and the right lifting arc plate are respectively and fixedly connected with the left longitudinal beam and the right longitudinal beam through a welding mode except the front end part and the rear end part, the bottom of the left lifting arc plate and the bottom of the right lifting arc plate are respectively provided with a first round hole with the inner diameter matched with the outer diameter of the middle pipe, and the two ends of the middle pipe are respectively penetrated through the first round hole and the bottoms of the left lifting arc plate and the right lifting arc plate are welded together.
Further, the inner side of the left lifting arc plate and the inner side of the right lifting arc plate are respectively provided with an inner pasting plate, and the outer side of the left lifting arc plate and the outer side of the right lifting arc plate are respectively provided with an outer pasting plate.
Further, set up the internal diameter on interior flitch and the outer flitch with the second round hole that the middle pipe external diameter matches, interior flitch and outer flitch pass through the second round hole welding is in on the middle pipe and with left side lift arc board and right side lift arc board welding together.
Furthermore, the lifting fixing seat and the middle pipe are welded into a whole through a welding seam, and the lifting fixing pin shaft is assembled in an axial inner hole of the lifting fixing seat in an interference mode.
Furthermore, the side parts of the lifting fixing seat and the lifting fixing pin shaft are respectively provided with radial limiting holes which are matched with each other, and the transverse pin shaft is inserted into the radial limiting holes of the lifting fixing seat and the lifting fixing pin shaft to limit the lifting fixing pin shaft in the lifting fixing seat.
Furthermore, one end of the lifting fixing seat, which is provided with the lifting fixing pin shaft, is provided with a conical surface.
According to the mining dump truck lifting seat provided by the invention, the lifting arc plate integrally processed and formed by the whole steel plate replaces a box-type seat body structure to support at the bottom of the longitudinal beam to bear the lifting force of the mining dump truck in the lifting process, so that the eccentric load of the welding line on the inner side and the outer side of the box-type seat body structure can be avoided. And because the lifting arc plate has a relatively thin section, the overall rigidity of the lifting arc plate is weakened, so that the torsion influence of the left and right longitudinal beams of the frame during torsion can be reduced, and the lifting arc plate no longer bears the torsion resistance of the frame. Meanwhile, the influence of the sudden change of the cross section of the contact part of the lifting arc plate and the longitudinal beam on the rigidity of the longitudinal beam can be weakened, the stress of the longitudinal beam is uniformly dispersed and slowly transited, and the stress concentration and sudden change caused by the sudden change of the cross section of the longitudinal beam at the position of the lifting arc plate are avoided.
Drawings
Fig. 1 is a schematic structural diagram of a lifting seat of a mining dump truck according to an embodiment of the invention;
fig. 2 is a bottom view of a lifting seat of a mining dump truck according to an embodiment of the invention.
Detailed Description
Referring to fig. 1, the lifting seat of the mining dump truck provided by the embodiment of the invention comprises a left longitudinal beam 1 and a right longitudinal beam 1 which are arranged at the bottom of a truck bed and the rear ends of which are hinged with the truck bed, and a left lifting arc plate 2 and a right lifting arc plate 2 which are respectively and fixedly arranged at the bottoms of the left longitudinal beam 1 and the right longitudinal beam 1. Wherein, it is the same structure that the arc board 2 is wholly processed and form with the monoblock steel sheet to control to lift, and the arc board 2's bottom is fixed connection respectively in the both ends of middle pipe 5 about controlling. Two ends of the middle pipe 5 are respectively and fixedly provided with a lifting fixing seat 6, and a lifting fixing pin 7 for hinging a lifting oil cylinder is arranged in an axial inner hole of the lifting fixing seat 6.
The left and right lifting arc plates 2 comprise top edges 2-1 fixedly connected with the left and right longitudinal beams 1 respectively and bottom portions 2-2 fixedly connected with the middle pipe 5. In order to reduce the abrupt rigidity change in the longitudinal beam direction and avoid the generation of stress concentration, a front transition cambered surface 2-3 and a rear transition cambered surface 2-4 are arranged between the top edge 2-1 and the bottom 2-2. The front transition cambered surface 2-3 is connected with the front end part 2-7 of the top edge through a first bevel edge 2-5, and the rear transition cambered surface 2-4 is connected with the rear end part 2-8 of the top edge through a second bevel edge 2-6.
In order to effectively reduce the abrupt change of the rigidity in the longitudinal beam direction and avoid the generation of stress concentration, the transition fillet radius R of the front transition arc surface 2-3 and the rear transition arc surface 2-4 is set to be 300mm-800mm, meanwhile, the included angle between the top edge 2-1 and the first bevel edge 2-5 is set to be 15-35 degrees, and the included angle between the top edge 2-1 and the second bevel edge 2-6 is set to be 15-35 degrees.
In order to lighten the quality of the lifting seat of the mining dump truck and ensure the use strength of the lifting seat, the thickness of the left lifting arc plate and the right lifting arc plate 2 is set to be 16-30 mm.
As a specific embodiment of the invention, the top edges 2-1 of the left and right lifting arc plates 2 are fixedly connected with the left and right longitudinal beams 1 in a welding mode. However, the front end part 2-7 of the top edge, the rear end part 2-8 of the top edge and the left and right longitudinal beams 1 are not welded, namely, the contact parts of the front and rear end points of the top edge 2-1 and the left and right longitudinal beams 1 are not welded and a gap is reserved, so that the contact parts only bear compressive stress but not tensile stress, the stress amplitude can be reduced, and the influence of stress fatigue on the left and right longitudinal beams 1 and the left and right lifting arc plates 2 can be reduced. Of course, as other specific embodiments of the present invention, the arc blocks capable of increasing the welding surfaces with the left and right longitudinal beams 1 may be disposed at the front and rear end points of the top edge 2-1, so as to ensure that the welding seams welded between the left and right lifting arc plates 2 and the bottom surfaces of the left and right longitudinal beams 1 are in circular transition, effectively increase the length and welding surfaces of the welding seams in the transition region, reduce the maximum stress of the welding seams, eliminate the complicated polishing process, and greatly increase the working efficiency.
As a specific embodiment of the invention, the bottoms 2-2 of the left and right lifting arc plates 2 are respectively provided with a round hole with the inner diameter matched with the outer diameter of the middle pipe 5, the two ends of the middle pipe 5 respectively penetrate through the round holes to be connected with the bottoms 2-2 of the left and right lifting arc plates 2, and the two ends of the middle pipe 5 are fixedly connected with the bottoms 2-2 of the left and right lifting arc plates 2 in a welding mode.
In order to enhance the lifting strength of the left and right lifting arc plates 2, as a specific embodiment of the present invention, outer attachment plates 3 are respectively disposed on the outer sides of the left and right lifting arc plates 2, and inner attachment plates 4 are respectively disposed on the inner sides of the left and right lifting arc plates 2.
As a specific embodiment of the present invention, in order to enhance the stability of the connection between the outer attachment plate 3 and the inner attachment plate 4 and the left and right lifting arc plates 2 and the middle tube 5, circular holes with inner diameters matched with the outer diameter of the middle tube 5 are formed on the inner attachment plate 4 and the outer attachment plate 3, the inner attachment plate 4 and the outer attachment plate 3 are sleeved on the middle tube 5 through the circular holes and are fixedly connected with the middle tube 5 through welding, and meanwhile, the inner attachment plate 4 and the outer attachment plate 3 are also fixedly connected with the left and right lifting arc plates 2 through welding.
As a specific embodiment of the invention, the lifting fixing seat 6 and the middle pipe 5 are welded into a whole through a welding seam and are used for the transitional connection of the lifting fixing pin shaft 7 and the middle pipe 5. An axial inner hole is processed at the axis position of the lifting fixing seat 6, one end of the lifting fixing pin 7 is assembled in the axial inner hole of the lifting fixing seat 6 in an interference mode, and the other end of the lifting fixing pin 7 is hinged with a piston rod of a lifting oil cylinder and used for bearing acting force of the lifting oil cylinder. The fixed end of the lifting oil cylinder is hinged with the carriage.
In order to prevent the lifting fixing pin 7 from coming out of the axial inner hole of the lifting fixing base 6, radial limiting holes are respectively formed in the side portions of the lifting fixing base 6 and the lifting fixing pin 7, and the transverse pin shaft 8 is inserted into the radial limiting holes of the lifting fixing base 6 and the lifting fixing pin 7, so that the lifting fixing pin 7 is limited in the axial inner hole of the lifting fixing base 6 for fixing.
As a specific embodiment of the invention, one end of the lifting fixing seat 6 connected with the lifting fixing pin 7 is set to be a conical surface, which is used for dispersing the acting force of the lifting oil cylinder on one hand, and avoiding the interference between the lifting oil cylinder and the lifting fixing seat 6 when the lifting oil cylinder swings on the other hand. Of course, as another embodiment of the present invention, if the inner diameter of the middle tube 5 is smaller and can match the outer diameter of the lift pin 7, the lift fixing seat 6 can be eliminated and the lift pin 7 can be directly inserted into the middle tube 5.
The lifting seat of the mining dump truck provided by the embodiment of the invention adopts the lifting arc plate integrally processed by the whole steel plate as the lifting structure under the longitudinal beam, and has the advantages of simple structure, light weight and the like. And the two ends of the lifting arc plate are slowly transited along the contact direction of the longitudinal beam, so that the rigidity mutation in the direction of the longitudinal beam can be reduced, and stress concentration points are removed, thereby avoiding the generation of stress concentration. Because the lifting arc plate adopts a single-plate structure, the generation of the eccentric load on the inner surface and the outer surface of the box-shaped seat body in the lifting process can be avoided. Meanwhile, the lifting seat of the mining dump truck provided by the embodiment of the invention has the advantages of simple structure, light weight, low requirement on manufacturing precision, low cost, low failure rate and the like, and can effectively avoid the defects of the lifting oil cylinder support with the conventional box-type structure.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. A mining dump truck lifting seat is characterized in that: including setting up at carriage bottom and rear end and carriage articulated left longeron and right longeron, fixed setting is respectively lift arc board and right lift arc board in a left side of left side longeron and right longeron bottom, the arc board is lifted on a left side and the arc board is lifted on the right side and is lifted the same structure of the whole machine-shaping of monoblock steel sheet, the bottom that the arc board is lifted on a left side and the arc board is lifted on the right side is fixed connection respectively in the intervalve both ends, the intervalve both ends are fixed respectively and are set up the fixing base of lifting, it sets up the lifting fixed pin axle that is used for articulated lift cylinder in the axial hole of fixing base to lift.
2. The mining dump truck lifting seat according to claim 1, characterized in that: the left lifting arc plate and the right lifting arc plate comprise top edges fixedly connected with the left longitudinal beam and the right longitudinal beam respectively, and bottom fixedly connected with the middle pipe, a front transition arc surface and a rear transition arc surface are arranged between the top edges and the bottom, the front transition arc surface is connected with the front end of the top edges through a first bevel edge, and the rear transition arc surface is connected with the rear end of the top edges through a second bevel edge.
3. The mining dump truck lifting seat according to claim 2, characterized in that: the included angle between the top edge and the first bevel edge is 15-35 degrees, the included angle between the top edge and the second bevel edge is 15-35 degrees, and the radius R of the transition fillet of the front transition cambered surface and the rear transition cambered surface is 300-800 mm.
4. The mining dump truck lifting seat according to claim 1, characterized in that: the thickness of the left lifting arc plate and the right lifting arc plate is 16-30 mm.
5. The mining dump truck lifting seat according to claim 1, characterized in that: the top edge of the left lifting arc plate and the right lifting arc plate are respectively fixedly connected with the left longitudinal beam and the right longitudinal beam through a welding mode except the front end part and the rear end part, the bottom of the left lifting arc plate and the bottom of the right lifting arc plate are respectively provided with a first round hole matched with the outer diameter of the middle pipe, and two ends of the middle pipe are respectively penetrated through the first round holes and the left lifting arc plate and the right lifting arc plate are welded together.
6. The mining dump truck lifting seat according to claim 5, characterized in that: the inboard of left side lift arc board and right side lift arc board sets up interior flitch respectively, the outside of left side lift arc board and right side lift arc board sets up outer flitch respectively.
7. The mining dump truck lifting seat according to claim 6, characterized in that: set up the internal diameter on interior flitch and the outer flitch with the second round hole that the middle pipe external diameter matches, interior flitch and outer flitch pass through the second round hole welding is in on the middle pipe and with the arc board is lifted on a left side and the arc board welding is lifted on the right side together.
8. The mining dump truck lifting seat according to claim 1, characterized in that: the lifting fixing seat and the middle pipe are welded into a whole through a welding seam, and the lifting fixing pin shaft is assembled in an axial inner hole of the lifting fixing seat in an interference mode.
9. The mining dump truck lifting seat according to claim 8, characterized in that: the lateral parts of the lifting fixing seat and the lifting fixing pin shaft are respectively provided with radial limiting holes which are matched with each other, and the transverse pin shaft is inserted into the radial limiting holes of the lifting fixing seat and the lifting fixing pin shaft to limit the lifting fixing pin shaft in the lifting fixing seat.
10. The mining dump truck lifting seat according to claim 9, characterized in that: one end of the lifting fixing seat, which is provided with the lifting fixing pin shaft, is set to be a conical surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010938279.3A CN112109617A (en) | 2020-09-09 | 2020-09-09 | Lifting seat of mining dump truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010938279.3A CN112109617A (en) | 2020-09-09 | 2020-09-09 | Lifting seat of mining dump truck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112109617A true CN112109617A (en) | 2020-12-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010938279.3A Pending CN112109617A (en) | 2020-09-09 | 2020-09-09 | Lifting seat of mining dump truck |
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| Country | Link |
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| CN (1) | CN112109617A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114537244A (en) * | 2022-03-28 | 2022-05-27 | 徐州徐工矿业机械有限公司 | Flexible support structure of frame and mining dump truck |
-
2020
- 2020-09-09 CN CN202010938279.3A patent/CN112109617A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114537244A (en) * | 2022-03-28 | 2022-05-27 | 徐州徐工矿业机械有限公司 | Flexible support structure of frame and mining dump truck |
| CN114537244B (en) * | 2022-03-28 | 2022-12-13 | 徐州徐工矿业机械有限公司 | Flexible support structure of frame and mining dump truck |
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