Low-noise bottom-dump mine car

Abstract

The utility model discloses a low-noise bottom-dump mine car which comprises a car box, the car box is installed on a chassis, a bottom door is hinged to the chassis at the position corresponding to an opening in the bottom of the car box, the opening in the bottom of the car box is opened or closed when the bottom door rotates around a rotating shaft of the bottom door, and opening and closing folded plates are arranged on the periphery of the bottom of the car box. Buffer strips are arranged on the other three sides, except the hinged side of the bottom door, of the bottom of the opening and closing folded plate, at least two sets of wheel assemblies are arranged at the bottom of the bottom door, an unloading wheel assembly is arranged at the end, away from a hinged shaft, of the bottom of the bottom door and comprises two unloading wheel mounting bases, and the tops of the unloading wheel mounting bases are connected with the bottom of the bottom door. Unloading wheel axle mounting openings are formed in the bottoms of the unloading wheel mounting seats, unloading wheel axles are mounted in the unloading wheel axle mounting openings, wheel axle grooves are formed in one sides of the unloading wheel axles, clamping plates are clamped on the wheel axle grooves, and the two ends of the clamping plates are connected with the unloading wheel mounting seats at the two ends of the unloading wheel axle mounting openings respectively; the technical problem that in the prior art, a bottom-dump mine car generates large noise is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mining machinery, and particularly relates to a low-noise bottom-dumping mine car. Background Art

[0002] The bottom-dumping mine car is a common equipment in mining machinery. At present, it is generally of a double-bottom-dumping structure. However, in the prior art, the bottom angle iron of the car body directly contacts and bears on the bottom plates of two groups of bottom doors, and both the contacting angle iron and the bottom plate are made of rigid materials. When the mine car is running, in case of uneven tracks or other factors, the two bottom doors and the bottom surface of the car body will move up and down and vibrate out of sync, thus generating noise. Moreover, there are many hinge parts in the double-bottom-dumping doors, all of which are clearance fits and have relatively large tolerances. During the transportation of the mine car (especially when running empty), the hinge parts are prone to move or vibrate, thus generating noise. In addition, the unloading wheel set is fixed on the unloading wheel shaft clamp with an axle clamp cross pin, and there is a large space between the axle and the axle clamp cross pin. Although two medium-hard rubbers with a size of Φ20mm×16mm are used at both ends of the unloading wheel axle to fixedly contact with the axle clamp cross pin, after long-term wear of the rubber, the gap between the axle and the fixed pin becomes larger and the up-and-down vibration amount also becomes larger, thus generating noise. In addition, for the wheel set assembly, two stop spacer rings are welded on the wheel set axle to control the left-right movement amount of the wheel set, and there is no up-and-down stop measure for the position of the axle and the fixed cross pin of the axle clamp. In case of uneven running tracks and poor matching at the joint position of the tracks, the wheel set will also vibrate, thus generating noise. Therefore, how to reduce the noise of the bottom-dumping mine car has been a difficult problem that technicians in this field have been thinking about. Content of the Utility Model

[0003] The purpose of the utility model is to provide a low-noise bottom-dumping mine car to solve the technical problem of large noise generated by the bottom-dumping mine car in the above-mentioned prior art.

[0004] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0005] A low-noise bottom-dumping mine car, characterized in that it includes: a car body, the car body is installed on a chassis, the car body has an open structure at the top and bottom, a bottom door is hinged on the chassis corresponding to the opening position at the bottom of the car body, and the bottom door rotates around its rotating shaft to open or close the opening at the bottom of the car body. There are car body opening and closing folding plates around the bottom of the car body. Buffer strips are provided on the other three sides of the bottom of the car body opening and closing folding plates except the side where the bottom door is hinged. The car body opening and closing folding plates are in contact with or separated from the surface of the bottom door. At least two sets of wheel assemblies are provided at the bottom of the bottom door. An unloading wheel assembly is provided at one end of the bottom of the bottom door far from its hinge shaft. The unloading wheel assembly includes two unloading wheel mounting seats. The top of the unloading wheel mounting seat is connected to the bottom of the bottom door. The bottom of the unloading wheel mounting seat has an unloading wheel shaft mounting opening. An unloading wheel shaft is installed in the unloading wheel shaft mounting opening. A wheel shaft groove is provided on one side of the unloading wheel shaft. A clamping plate is clamped on the wheel shaft groove. Both ends of the clamping plate are connected to the unloading wheel mounting seats at both ends of the unloading wheel shaft mounting opening.

[0006] In the low-noise bottom-dumping mine car of the present utility model, the car body opening and closing folding plates have a plurality of folding plate mounting holes along the length direction. Buffer strip mounting holes are provided at positions corresponding to the folding plate mounting holes of the buffer strips. Connecting bolts are passed through the buffer strip mounting holes and the folding plate mounting holes to connect the folding plate mounting holes and the buffer strips.

[0007] In the low-noise bottom-dumping mine car of the present utility model, the thickness of the buffer strip is 12-18 mm, and the material of the buffer strip is a high-molecular plate.

[0008] In the low-noise bottom-dumping mine car of the present utility model, the buffer strip mounting holes are stepped holes that are larger at the bottom and smaller at the top, and the folding plate mounting holes are strip-shaped holes.

[0009] In the low-noise bottom-dumping mine car of the present utility model, the wheel assembly includes two wheel mounting seats. The top of the wheel mounting seat is connected to the bottom of the bottom door. The bottom of the wheel mounting seat has a through axle insertion opening. A wheel axle is installed at the axle insertion opening. A wheel axle cross pin mounting hole is provided on the wheel mounting seat at the end of the axle insertion opening. A cross pin is passed through the wheel axle cross pin mounting hole. The cross pin forms a vertical limit for the wheel axle.

[0010] In the low-noise bottom-dumping mine car of the present utility model, the gap between the cross pin and the wheel axle is not greater than 4 mm.

[0011] The beneficial effects of the present utility model are as follows: A low-noise bottom-dumping mine car is proposed. By setting buffer strips at the bottom of the carriage opening and closing flap, the rigid collision is changed into an elastic collision, and through the cooperation of counterbore holes and kidney-shaped holes, the bolts are not only protected from collision but also the installation tolerance can be enlarged; by setting a wheel axle groove on the unloading wheel axle and installing it in cooperation with a clamping plate, the unloading wheel axle is changed from a floating structure to a fixed structure, eliminating the noise here; by adjusting the shaft-blocking distance of the wheel pair axle clip cross pin, the amount of jumpable space is reduced, preventing noise generated during the movement, and by changing the double-door structure to a single-door structure, the number of hinged parts is reduced, and the mating tolerance is decreased, enhancing the overall rigidity of the bottom door to achieve the purpose of reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present utility model will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0013] Figure 1 is a schematic diagram of an embodiment of the present utility model;

[0014] Figure 2 is a sectional view of an embodiment of the present utility model;

[0015] Figure 3 is a partial schematic diagram of the unloading wheel assembly of an embodiment of the present utility model;

[0016] Figure 4 is a partial schematic diagram of the wheel assembly of an embodiment of the present utility model;

[0017] Figure 5 is a partial sectional view of the buffer strip of an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0019] As Figures 1-5As shown in the figure, a low-noise bottom-dumping mine car is characterized by comprising: a car body 100, the car body 100 is installed on a chassis 200, the car body 100 has an open structure at the top and bottom, a bottom door 300 is hinged on the chassis 200 corresponding to the open position at the bottom of the car body 100, the bottom door 300 opens or closes the open bottom of the car body 100 during the rotation around its rotating shaft, the periphery of the bottom of the car body 100 has car body opening and closing folding plates 110, and buffer strips 120 are arranged on the other three sides of the bottom of the car body opening and closing folding plates 110 except the side where the bottom door 300 is hinged. The car body opening and closing folding plates 110 are in contact with or separated from the surface of the bottom door 300. At least two groups of wheel assemblies 400 are arranged at the bottom of the bottom door 300, and an unloading wheel assembly 500 is arranged at one end of the bottom of the bottom door 300 far from its hinge shaft. The unloading wheel assembly 500 includes two unloading wheel mounting seats 310. The top of the unloading wheel mounting seat 310 is connected to the bottom of the bottom door 300. An unloading wheel shaft mounting opening 311 is arranged at the bottom of the unloading wheel mounting seat 310. An unloading wheel shaft 320 is installed in the unloading wheel shaft mounting opening 311. A wheel shaft groove 321 is arranged on one side of the unloading wheel shaft 320. A clamping plate 330 is clamped on the wheel shaft groove 321. Two ends of the clamping plate 330 are respectively connected to the unloading wheel mounting seats 310 at both ends of the unloading wheel shaft mounting opening 311.

[0020] It should be noted that the clamping plate 330 is fixedly installed on the unloading wheel mounting seat 310 through bolts. The bolts are not shown in the figure. The clamping plate 330 presses tightly against the unloading wheel shaft 320 to make it a fixed connection, so as to prevent the wheel shaft from moving axially during the unloading process and generating collisions to emit noise. The width of the wheel shaft groove 321 is greater than the thickness of the clamping plate 330, so that there is a certain installation margin in the axial direction.

[0021] In a preferred embodiment of the present invention, the car body opening and closing folding plates 110 have a plurality of folding plate mounting holes 111 along the length direction. Buffer strip mounting holes 121 are arranged at positions corresponding to the folding plate mounting holes 111 of the buffer strips 120. Connecting bolts 130 are passed through the buffer strip mounting holes 121 and the folding plate mounting holes 111 to connect the folding plate mounting holes 111 and the buffer strips 120. Such a detachable connection can not only realize the separate processing and production of the two, but also facilitate the later maintenance and replacement.

[0022] In a preferred embodiment of the present invention, the thickness of the buffer strip 120 is 12-18 mm, the material of the buffer strip 120 is a high molecular plate, and the high molecular material has a certain strength and wear resistance and can play a buffering role.

[0023] In a preferred embodiment of the present utility model, the buffer strip mounting hole 121 is a stepped hole that is larger at the bottom and smaller at the top, and the folding plate mounting hole 111 is a strip-shaped hole. This can prevent collision with the connecting bolt 130 during use, and at the same time, there is a certain margin during installation, reducing the alignment accuracy requirements for the buffer strip mounting hole 121 and the folding plate mounting hole 111.

[0024] In a preferred embodiment of the present utility model, the wheel assembly 400 includes two wheel mounting seats 410. The top of the wheel mounting seat 410 is connected to the bottom of the bottom door 300. The bottom of the wheel mounting seat 410 has a through axle insertion opening 411. A wheel axle 420 is installed at the axle insertion opening 411. The wheel mounting seat 410 at the end of the axle insertion opening 411 has a wheel axle cross pin mounting hole 430. A cross pin is inserted through the wheel axle cross pin mounting hole 430, and the cross pin forms a vertical limit for the wheel axle 420.

[0025] In a preferred embodiment of the present utility model, the gap between the cross pin and the wheel axle 420 is not greater than 4 mm. Such a setting reduces the amount of jump space. At the same time, the contact tread surface between the wheel and the track is machined. While ensuring the smoothness of the tread surface, concentricity is also ensured to reduce the jumping phenomenon caused by the non-concentricity of the axle and the wheel.

[0026] It should be noted that for the carriage opening and closing folding plate 110 on the side without the buffer strip installed, a 16 mm steel plate is used for bottom sealing to enhance its strength and stiffness, thereby reducing the impact noise; the double-bottom discharge door of the ore car is changed to a single-bottom discharge door to reduce the number of hinged parts, improve the overall rigidity of the bottom door, and at the same time increase the flatness of the bottom door. At the same time, the fitting tolerance between the large cross pin of the bottom door and the hinge and the front buffer seat is improved, and the movable space at the hinge of the bottom door is minimized as much as possible, so as to achieve the purpose of reducing noise; at the same time, by increasing the profile dimensions of each profile, such as changing the carriage 100 steel plate from δ5 mm before to δ8 mm, and the bottom door 300 from δ6 mm before to δ12 mm, the strength and service life of the ore car are increased. At the same time, the self-weight of the ore car is also used to suppress or reduce the amplitude of possible jumping of each component to reduce noise.

[0027] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0028] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the description of the present utility model, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0029] It should be understood that those of ordinary skill in the art can make improvements or transformations according to the above description, and all such improvements and transformations shall fall within the protection scope of the appended claims of the present utility model.

Claims

1. A low-noise bottom-dumping mine car, characterized in that: include: A vehicle box (100), the vehicle box (100) being mounted on a chassis (200), the vehicle box (100) being a structure with top and bottom openings, a bottom door (300) being hingedly connected to the chassis (200) at a position corresponding to the bottom opening of the vehicle box (100), the bottom opening of the vehicle box (100) being opened or closed during the rotation of the bottom door (300) around its rotation axis, a vehicle box opening and closing folding plate (110) being provided around the bottom of the vehicle box (100), buffer strips (120) being provided on the other three sides of the bottom of the vehicle box opening and closing folding plate (110) except for one side hinged with the bottom door (300), the vehicle box opening and closing folding plate (110) being in contact with or separated from the surface of the bottom door (300), and the bottom of the bottom door (300) being provided with at least two sets of wheels The bottom door (300) has an unloading wheel assembly (500) at one end away from the hinge axis of the bottom door (300), and the unloading wheel assembly (500) comprises two unloading wheel mounting seats (310), the top of the unloading wheel mounting seat (310) is connected to the bottom of the bottom door (300), the bottom of the unloading wheel mounting seat (310) has an unloading wheel axle mounting opening (311), an unloading wheel axle (320) is mounted in the unloading wheel axle mounting opening (311), one side of the unloading wheel axle (320) has an axle groove (321), a clamping plate (330) is clamped on the axle groove (321), and two ends of the clamping plate (330) are respectively connected to the unloading wheel mounting seats (310) at two ends of the unloading wheel axle mounting opening (311).

2. A low-noise bottom-dumping mine car according to claim 1, characterized in that: The vehicle box opening and closing folding plate (110) has a plurality of folding plate mounting holes (111) along the length direction, the buffer strip (120) has a buffer strip mounting hole (121) at a position corresponding to the folding plate mounting hole (111), and connecting bolts (130) are passed through the buffer strip mounting hole (121) and the folding plate mounting hole (111) to connect the folding plate mounting hole (111) and the buffer strip (120).

3. A low noise bottom discharge mine car according to claim 2, characterized in that: The thickness of the buffer strip (120) is 12-18 mm, and the material of the buffer strip (120) is a polymer sheet.

4. A low noise bottom discharge mine car according to claim 2, characterized in that: The buffer strip mounting hole (121) is a stepped hole that is larger at the bottom and smaller at the top, and the folding plate mounting hole (111) is a strip-shaped hole.

5. A low noise bottom discharge mine car according to claim 1, characterized in that: The wheel assembly (400) comprises two wheel mounting seats (410), the top of the wheel mounting seat (410) being connected to the bottom of the bottom door (300), the bottom of the wheel mounting seat (410) being provided with a through axle inlet (411), a wheel axle (420) being installed at the axle inlet (411), and a wheel axle cross pin mounting hole (430) being provided on the wheel mounting seat (410) at the end of the axle inlet (411), a cross pin being passed through the wheel axle cross pin mounting hole (430), the cross pin forming a vertical limit for the wheel axle (420).

6. A low-noise bottom-dumping mine car according to claim 5, characterized in that: The gap between the transverse pin and the wheel axle (420) is no greater than 4 mm.

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