A catenary contact force balancing mechanism for a pantograph, a pantograph and an electric truck

Abstract

The invention provides a catenary contact force balancing mechanism for a pantograph, the pantograph and an electric truck, comprising a bottom box, the top of the bottom box is connected with a large arm assembly through a pull rod assembly, the top of the large arm assembly is connected with a pantograph head assembly through a small arm assembly; characterized in that: a support is hinged to the top of the bottom box, a balance wheel is hinged inside the support, one end of the pull rod assembly is wound on the outer edge of the balance wheel through a steel wire rope; during the rising or falling of the pantograph head assemblies on both sides, the support drives the balance wheel to synchronously swing around a first rotation shaft, when there is a height difference in the catenary or the vehicle is tilted so that the unilateral pantograph head assembly is subjected to a larger catenary pressure, the unilateral pull rod assembly is pulled upward, the balance wheel will rotate around a second rotation shaft, the corresponding side pantograph head assembly is driven upward through the other side pull rod, that is, the catenary contact force of the other side pantograph head assembly is increased, so as to balance the catenary contact forces of the pantograph head assemblies on both sides to solve the problem of unbalanced catenary contact forces of the pantograph head assemblies of the existing truck pantograph.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric mine truck, in particular to a pantograph contact net force balancing mechanism, a pantograph and an electric truck. BACKGROUND

[0002] As Figures 1-2 The existing pantograph structure is shown in the figure, which comprises a bottom box 01, the top of the bottom box 01 is connected with a large arm assembly 03 through a pull rod assembly 02, the top of the large arm assembly 03 is connected with a bow head assembly 05 through a small arm assembly 04, the lower hinge points 022 of the pull rod of the pull rod assembly 02 and the lower hinge points 032 of the large arm of the large arm assembly 03 are respectively hinged with the bottom box 01, the upper hinge points 021 of the pull rod of the pull rod assembly 02 and the upper hinge points 031 of the large arm of the large arm assembly 03 are respectively hinged with a bracket 06, and the bottom box 01, the pull rod assembly 02, the large arm assembly 03 and the bracket 06 form a four-bar linkage mechanism.

[0003] When the air bag drives the large arm assembly 03 to tilt up, the horizontal pipe 033 on the large arm assembly 03 drives the large arm assembly 03 to rotate counterclockwise around the large arm lower hinge point 032, and the small arm assembly 04 is driven to rotate counterclockwise around the hinge point of the bow head assembly 05 while the large arm upper hinge point 031 is lifted.

[0004] Because the pull rod assembly is hard connected and the length is unchanged, the height of the two bow head assemblies 05 will always remain the same.

[0005] The defects and deficiencies of the existing pantograph structure in use are that:

[0006] 1) The line net of the truck pantograph needs two positive and negative line nets, and the actual two line nets have a height difference, and when the vehicle drives to a bumpy road section, the vehicle body will tilt, and because the heights of the two bow heads always remain the same, one of the two bow heads will not be in contact with the line net, which will cause safety hazards such as arc drawing.

[0007] 2) When the truck pantograph is not working, the small arm assembly, the large arm assembly and the pull rod assembly will all fall down, and the distance between the two pull rod lower hinge points of the pull rod assembly 02 is large, which will occupy a large roof layout space.

[0008] Therefore, it is urgent to provide a new scheme to solve the defects and deficiencies in the prior art. SUMMARY

[0009] Therefore, in order to solve the defects and deficiencies in the prior art, the present application provides a pantograph contact net force balancing mechanism, a pantograph and an electric truck.

[0010] The technical scheme provided by the present application is as follows:

[0011] A catenary force balancing mechanism for a pantograph, comprising a bottom box, a large arm assembly connected to the top of the bottom box through a pull rod assembly, and a pantograph head assembly connected to the top of the large arm assembly through a small arm assembly; characterized in that: a bracket is hinged to the top of the bottom box, a balance wheel is hinged inside the bracket, and one end of the pull rod assembly is wound around the outer edge of the balance wheel through a steel wire rope.

[0012] As a further preferred embodiment of the present application, the bottom of the bracket is hinged to a support fixed to the top of the bottom box through a first rotating shaft.

[0013] As a further preferred embodiment of the present application, the top of the bracket is hinged to the balance wheel through a second rotating shaft.

[0014] As a further preferred embodiment of the present application, the extension directions of the first rotating shaft and the second rotating shaft are perpendicular to each other in space.

[0015] As a further preferred embodiment of the present application, a rolling bearing is arranged between the center hole of the balance wheel and the second rotating shaft.

[0016] As a further preferred embodiment of the present application, one end of the steel wire rope is threadedly connected to the pull rod assembly.

[0017] As a further preferred embodiment of the present application, a groove is opened in the outer periphery of the balance wheel, and the other end of the steel wire rope is accommodated inside the groove.

[0018] As a further preferred embodiment of the present application, a limiting block is protrudingly arranged on the top of the balance wheel, and the limiting block is limitedly matched with the brackets on both sides.

[0019] Further, the present application also provides a pantograph, wherein the pantograph is provided with the catenary force balancing mechanism for a pantograph.

[0020] Further, the present application also provides an electric truck, wherein the electric truck is provided with the pantograph.

[0021] The beneficial effects achieved by the present application relative to the prior art include:

[0022] 1) The invention provides a catenary contact force balancing mechanism for a pantograph, a pantograph and an electric truck. During the lifting or lowering of the two side head assemblies, the support drives the balance wheel to synchronously swing around the first rotating shaft. When there is a height difference in the catenary or the vehicle is tilted, the unilateral head assembly is subjected to a larger catenary pressure, the unilateral pull rod assembly is pulled up, the balance wheel rotates around the second rotating shaft, and the corresponding side head assembly is lifted by the other side pull rod, that is, the catenary contact force of the other side head assembly is increased, so as to balance the catenary contact force of the two side head assemblies and solve the problem of unbalanced catenary contact force of the two head assemblies of the existing truck pantograph, thereby reducing the charging interruption and safety hazards caused by the problem.

[0023] 2) The invention provides a catenary contact force balancing mechanism for a pantograph, a pantograph and an electric truck. The bottom of the support is hinged to the support base through the first rotating shaft, and the balance wheel center hole is hinged to the second rotating shaft using a rolling bearing, which is flexible in rotation and makes the balancing of the catenary contact force of the two head assemblies more sensitive.

[0024] 3) The invention provides a catenary contact force balancing mechanism for a pantograph, a pantograph and an electric truck. A limiting block is arranged on the balance wheel to limit the angle of rotation of the balance wheel and thereby limit the height difference between the two head assemblies.

[0025] 4) The invention provides a catenary contact force balancing mechanism for a pantograph, a pantograph and an electric truck. When the truck pantograph is not working, the balance wheel and the support occupy a smaller arrangement space. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a structure top view of a pantograph structure in the prior art.

[0027] Figure 2 It is a structure side view of a pantograph structure in the prior art.

[0028] Figure 3 It is a structure top view of a catenary contact force balancing mechanism for a pantograph provided by the invention.

[0029] Figure 4 It is a structure schematic diagram of a catenary contact force balancing mechanism for a pantograph provided by the invention from a first perspective.

[0030] Figure 5 It is a structure schematic diagram of a catenary contact force balancing mechanism for a pantograph provided by the invention from a second perspective.

[0031] Figure 6 It is a structure front view of a support and a balance wheel provided by the invention.

[0032] Figure 7 It is a structure top view of a support and a balance wheel provided by the invention. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0034] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be broadly understood, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium; can be the communication inside two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] [First embodiment]

[0037] As Figures 3-7 The first embodiment of the present application provides a catenary contact force balancing mechanism for a pantograph, which comprises a bottom box 11, the top of the bottom box 11 is connected with a large arm assembly 13 through a pull rod assembly 12, the top of the large arm assembly 13 is connected with a pantograph head assembly 15 through a small arm assembly 14; characterized in that: a support 16 is hinged to the top of the bottom box 11, a balance wheel 17 is hinged inside the support 16, and one end of the pull rod assembly 12 is wound on the outer edge of the balance wheel 17 through a steel wire rope 121.

[0038] During the lifting or lowering of the two-side pantograph assembly, the support 16 drives the swing wheel 17 to swing synchronously to adapt to the lifting or lowering of the two-side pantograph assembly; meanwhile, when there is a height difference in the wire net or the vehicle is tilted so that the unilateral pantograph assembly is subjected to a larger pressure from the wire net, the unilateral pull rod assembly is pulled upward, the swing wheel rotates around the second pivot, and the corresponding side pantograph assembly is lifted through the other pull rod, that is, the contact force of the other side pantograph assembly is increased, so as to balance the contact forces of the two-side pantograph assemblies to solve the problem of unbalanced contact forces of the two pantographs of the existing truck pantograph.

[0039] In the embodiment, as shown in Figures 4-7 the bottom of the support 16 is hinged to the support seat 161 fixed to the top of the bottom box 11 through the first pivot S1, so that the support 16 drives the swing wheel 17 to swing synchronously to adapt to the lifting or lowering of the two-side pantograph assembly through the hinged mode

[0040] and the top of the support 16 is hinged to the swing wheel 17 through the second pivot S2, when there is a height difference in the wire net or the vehicle is tilted so that the unilateral pantograph assembly is subjected to a larger pressure from the wire net, the unilateral pull rod assembly is pulled upward, the swing wheel rotates around the second pivot, and the corresponding side pantograph assembly is lifted through the other pull rod, that is, the contact force of the other side pantograph assembly is increased, so as to balance the contact forces of the two-side pantograph assemblies to solve the problem of unbalanced contact forces of the two pantographs of the existing truck pantograph.

[0041] By hinging the bottom of the support to the support seat through the first pivot and hinging the central hole of the swing wheel 17 to the second pivot S2 using a rolling bearing, the rotation is flexible, and the balance of the contact forces of the two pantographs is more sensitive.

[0042] In the embodiment, the extension directions of the first pivot S1 and the second pivot S2 are perpendicular to each other in space, so as to meet the rotation requirements of the swing wheel in different dimensions.

[0043] In the embodiment, one end of the steel wire rope 121 is threadedly connected to the pull rod assembly 12, and the outer periphery of the swing wheel 17 is provided with a groove 171, and the other end of the steel wire rope 121 is accommodated in the groove 171, so as to ensure that the pull rod assembly 12 can be stably sleeved on the outer periphery of the swing wheel 17.

[0044] As a preferred embodiment, as shown in Figures 5-6 the top of the swing wheel 17 is provided with a limiting block 18, and the limiting block is limited to cooperate with the two-side supports 16, when the swing wheel 17 rotates to a preset angle position relative to the second pivot S2, the limiting block on the swing wheel abuts against the two-side supports 16, the swing wheel can be angularly stopped by the limiting block 18 through the support 16, so as to limit the angle of rotation of the swing wheel, and further limit the height difference of the two pantographs.

[0045] [Second embodiment]

[0046] The second embodiment of the present application also provides a pantograph, on which the contact force balancing mechanism for pantograph mentioned in the first embodiment is arranged.

[0047] [Third embodiment]

[0048] The third embodiment of the present application also provides an electric truck, on which the pantograph mentioned in the second embodiment is arranged.

[0049] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Consequently, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the present application being defined by the appended claims rather than the above description, and it is intended to embrace all changes and modifications that fall within the meaning and scope of equivalents of the claims. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

Claims

1. A catenary force balancing mechanism for a pantograph comprising a base box (11), the top of the base box (11) is connected with a large arm assembly (13) through a pull rod assembly (12), the top of the large arm assembly (13) is connected with a pantograph head assembly (15) through a small arm assembly (14); characterized in that: The bottom box (11) top hinged support (16), in the interior of the hinged balance wheel (17), one end of the pull rod assembly (12) through the wire rope (121) winding on the outer edge of the balance wheel (17); The bottom of the support (16) is hinged to the support (161) fixed to the top of the bottom box (11) through the first rotating shaft (S1); The top of the support (16) is hinged to the balance wheel (17) through the second rotating shaft (S2); The extension direction of the first rotating shaft (S1) and the second rotating shaft (S2) is perpendicular to each other in space; The top of the balance wheel (17) is provided with a limiting block (18), which is limited with the two side supports (16); During the rising or falling process of the two side bow head assemblies (15), the support (16) drives the balance wheel (17) to swing synchronously to adapt to the rising or falling process of the two side bow head assemblies (15); at the same time, when there is a height difference in the wire net or the vehicle is tilted, the unilateral bow head assembly (15) is subjected to greater pressure from the wire net, the unilateral pull rod assembly (12) is pulled up, the balance wheel (17) will rotate around the second rotating shaft (S2), and the corresponding side bow head assembly (15) is driven to rise through the other side pull rod assembly, that is, the contact force of the other side bow head assembly (15) is increased, so as to realize the balance of the contact force of the two side bow head assemblies (15) and solve the problem of unbalanced contact force of the two bow heads of the existing truck pantograph.

2. A pantograph current collector force balancing mechanism as claimed in claim 1, wherein: The center hole of the balance wheel (17) and the second rotating shaft (S2) are provided with a rolling bearing.

3. A pantograph current collector force balancing mechanism as claimed in claim 1, wherein: One end of the wire rope (121) is threadedly connected with the pull rod assembly (12).

4. A pantograph current collector force equalization mechanism as claimed in claim 3, wherein: The outer periphery of the balance wheel (17) is provided with a groove (171), and the other end of the wire rope (121) is accommodated in the groove (171).

5. A pantograph characterized by: The pantograph is provided with a contact force balancing mechanism for pantograph according to any one of claims 1-4.

6. An electric truck characterized by: The electric truck is provided with a pantograph according to claim 5.

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