Double-pull rod slewing mechanism and bogie

Abstract

The invention discloses a double-pull rod slewing mechanism and a bogie, wherein the slewing mechanism comprises two groups of symmetrically arranged connecting frames, a plurality of traction rods are arranged between the two groups of connecting frames, a mounting seat is arranged on one side of each connecting frame, a mounting plate is arranged on one side of the mounting seat, and a slewing stopper is arranged at the end of the other side of the connecting frame. The invention has a simple structure, is reliable, and has low cost. The traction force and the braking force are transmitted jointly by the cross connection of the two traction rods, and the requirements of the two vehicles passing through a small curve can be met at the same time. The metal joint bearing has good torsional deflection characteristics and can adapt to the road conditions such as vehicle ramps, steps, and curves. The two traction rods are respectively installed on the upper and lower sides of the connecting frame and leave a certain vertical gap, which can adapt to the relative rolling movement between the two vehicle bodies. By arranging four slewing stops, the excessive rotation angle of the two axle bridges can be avoided. At the same time, the cross double-pull rod slewing mechanism is self-contained and can be disassembled separately, which is convenient for later inspection and maintenance.

Description

Technical Field

[0001] The present invention relates to the technical field of bogies, and in particular to a double-pull rod slewing mechanism and a bogie. Background Art

[0002] Low-floor urban rail vehicles are flexible, adaptable, have a short construction period, and have low unit comprehensive construction and operation costs. Low-floor trackless vehicles play an increasingly important role in many urban transportation. Low-floor trackless vehicles have the advantages of large vehicle marshaling capacity and low platforms for easy boarding and alighting, making them play an increasingly important role in urban transportation. Existing low-floor urban rail vehicles have limited space under the vehicle due to their low floor surface, which restricts the design of vehicle bogies. In addition, existing low-floor urban rail vehicle bogies generally have problems such as poor small curve passing ability, high floor surface that makes it difficult to board and alight, and bulky traction devices. Therefore, it is necessary to provide an articulated rail vehicle bogie.

[0003] Among them, Chinese patent CN106114545B discloses a low-floor articulated rail vehicle bogie frame and bogie, the frame consists of two side beams, two end beams and two mounting beams, the two end beams are welded and fixed to the two end portions of the two side beams respectively, and the side beams, end beams and mounting beams are welded to form a flat structure as a whole. The bogie optimizes the overall structure of the frame, making the frame flat as a whole, greatly reducing the height of the vehicle floor surface.

[0004] In addition, Chinese patent CN105923006B discloses a low-floor rail vehicle bogie bolster structure and bogie, including a bolster, an extension portion extending downward from the center of the lower surface of the bolster, and the bolster is connected to the car body through a slewing mechanism; it improves the overall structural strength of the bolster and improves its overall load-bearing capacity; at the same time, the bolster is connected to the car body through a slewing mechanism, which reduces the height of the floor surface and facilitates getting on and off the car.

[0005] However, in the existing low-floor trackless vehicles, the bogie is the most important structural component, and its structure and various parameters directly determine the stability of vehicle operation and the comfort of riding; for the bogie of the above-mentioned low-floor trackless vehicle, the bogie mostly adopts an articulated rotary structure, and the articulated rotary structure is usually composed of an articulated bearing, a bearing mounting seat, etc., but the articulated rotary structure has a complex structure and a large weight, and it is inconvenient to inspect and maintain the bogie, which not only increases the production difficulty of the bogie, but also reduces the work efficiency of the staff when maintaining the bogie.

[0006] Currently, no effective solution has been proposed for the problems in the related technologies. Summary of the invention

[0007] In view of the problems in the related art, the present invention proposes a double-tie rod slewing mechanism and a bogie to overcome the above-mentioned technical problems existing in the existing related art.

[0008] To this end, the specific technical solution adopted by the present invention is as follows:

[0009] According to one aspect of the present invention, a double-tie rod slewing mechanism and a bogie are provided, comprising two groups of symmetrically arranged connecting frames, a plurality of traction rods are arranged between the two groups of connecting frames, a mounting seat is arranged on one side of the connecting frame, a mounting plate is arranged on one side of the mounting seat, and a slewing stop is arranged at the end of the other side of the connecting frame.

[0010] Furthermore, in order to improve the strength and toughness of the slewing mechanism, the connecting frame, the mounting seat and the mounting plate are an integrally cast structure, and the connecting frame, the mounting seat and the mounting plate are cast from steel.

[0011] Furthermore, in order to achieve the coordinated installation between the connecting frame and the traction rod, the side of the connecting frame away from the mounting seat is set as a concave structure, and a symmetrical mounting groove is opened on the side of the connecting frame away from the mounting seat, and the inner side walls of the mounting groove are symmetrically opened with connecting grooves; the connecting groove inside one of the mounting grooves is higher than the connecting groove inside the other mounting groove.

[0012] Furthermore, in order to achieve the connection between the two connecting frames, and through the cross double tie rod setting, the transmission of traction and braking force, buffering of traction and braking impact and release of directional movement between the two vehicles are achieved, the traction tie rod is composed of a tie rod body and two groups of metal joint bearings matching with the connecting groove, and the metal joint bearings are arranged in the side walls at both ends of the tie rod body, and a cross structure is arranged between the two groups of tie rod bodies; the metal joint bearings and the connecting groove are connected by bolts.

[0013] Furthermore, in order to reduce the weight of the slewing mechanism and reduce the use of materials, a plurality of through holes are provided on the top of the mounting seat.

[0014] Furthermore, in order to achieve the installation between the mounting plate and the axle bridge, a plurality of evenly arranged bolt holes are provided on the side wall of the mounting plate.

[0015] Furthermore, in order to prevent the rotation angle between the two axles from being too large, thereby avoiding the two axles from folding due to a large rotation angle, the number of slewing stops is set to four, and the slewing stops are connected to the ends of the connecting frame by bolts.

[0016] According to another aspect of the present invention, a bogie is provided, comprising a plurality of axle bridges and running wheels at both ends of the axle bridges, and a double-pull rod slewing mechanism, wherein the axle bridges are connected to a mounting plate by bolts.

[0017] The beneficial effects of the present invention are:

[0018] 1. The present invention has a simple and reliable structure with low cost. The traction force and braking force are transmitted jointly by the cross-connection of two traction rods, and the requirements of the two vehicles passing through small curves can be met at the same time. The metal joint bearing has good torsional deflection characteristics and can adapt to vehicle ramps, steps, curves and other road conditions. The two traction rods are respectively installed on the upper and lower sides of the connecting frame and leave a certain vertical gap, which can adapt to the relative rolling movement between the two vehicle bodies. By providing four slewing stops, excessive rotation angles of the two axles can be avoided. At the same time, the cross double-rod slewing mechanism is self-contained and can be disassembled separately, which is convenient for later inspection and maintenance, and is beneficial to the staff's later inspection and maintenance of the bogie, thereby improving work efficiency.

[0019] 2. The present invention can meet the safety operation requirements of rubber-tyred low-floor vehicles in terms of strength and life, and realizes the low-floor function and vehicle connection through the bogie; the two-axle bridges are flexibly connected through cross double tie rods to realize the transmission of traction and braking force, buffer traction and braking impact, and release the directional movement between the two vehicles. It also replaces the slewing bearing structure of the traditional articulated bogie to realize the rotation between the two car bodies, which is convenient for promotion and use.

[0020] 3. The present invention adopts an integral casting structure for the connecting frame, the mounting seat and the mounting plate, so that the production process of the slewing mechanism is simpler, and the slewing mechanism is more solid and stable during use, and the production cost is low, thus saving production costs. Then, the connection to the connecting frame can be achieved through two sets of crossed traction rods. The installation steps are simple and convenient, thereby improving the installation efficiency of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 is a top view of a double-pull rod slewing mechanism according to an embodiment of the present invention;

[0023] Figure 2 is a partial schematic diagram of a double-pull rod slewing mechanism according to an embodiment of the present invention;

[0024] Figure 3 is a three-dimensional assembly diagram of a double-pull rod slewing mechanism according to an embodiment of the present invention;

[0025] Figure 4 yes Figure 3 A partial enlarged view of the middle A;

[0026] Figure 5 is a top view of a bogie according to an embodiment of the present invention;

[0027] Figure 6 The figure is a schematic diagram of the state of a bogie when negotiating a curve according to an embodiment of the present invention.

[0028] In the figure:

[0029] 1. Connecting frame; 101. Mounting slot; 102. Connecting slot; 2. Traction rod; 201. Rod body; 202. Metal joint bearing; 3. Mounting seat; 301. Through hole; 4. Mounting plate; 401. Bolt hole; 5. Rotation stopper; 6. Axle bridge; 7. Traveling wheel. DETAILED DESCRIPTION

[0030] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0031] According to an embodiment of the present invention, a double-tie rod slewing mechanism and a bogie are provided.

[0032] The present invention is further described with reference to the accompanying drawings and specific embodiments. Figure 1-Figure 4 As shown, according to one embodiment of the present invention, a double-pull rod slewing mechanism is provided, including two groups of symmetrically arranged connecting frames 1, and a plurality of traction rods 2 are arranged between the two groups of connecting frames 1. In addition, in specific applications, the number of traction rods 2 is set to two, and a mounting seat 3 is arranged on one side of the connecting frame 1, a mounting plate 4 is arranged on one side of the mounting seat 3, and a slewing stopper 5 is arranged on the end of the other side of the connecting frame 1.

[0033] With the aid of the above technical scheme of the present invention, the present invention has a simple structure, is reliable and has low cost. The traction force and the braking force are transmitted jointly by the cross connection of the two traction rods, and the requirements of the two vehicles passing through small curves can be met at the same time. The metal joint bearing 202 has good torsional deflection characteristics and can adapt to road conditions such as vehicle ramps, steps, curves, etc.; the two traction rods 2 are respectively installed on the upper and lower sides of the connecting frame 1 and leave a certain vertical gap, which can adapt to the relative rolling movement between the two vehicle bodies; by providing four slewing stops 5, it is possible to avoid excessive rotation angles of the two axle bridges; at the same time, the cross double-rod slewing mechanism is a self-contained module that can be disassembled separately, which is convenient for later inspection and maintenance; it can meet the safe operation requirements of rubber-tyred low-floor vehicles in terms of strength and life, and realize the low-floor function and vehicle connection through the bogie; the two axle bridges are flexibly connected by the cross double rods to realize the transmission of traction and braking force, buffer the traction and braking impact, and release the directional movement between the two vehicles, and replace the slewing bearing structure of the traditional articulated bogie to realize the rotation between the two vehicle bodies, which is convenient for promotion and use.

[0034] In one embodiment, for the above-mentioned connecting frame 1, mounting seat 3 and mounting plate 4, the connecting frame 1, mounting seat 3 and mounting plate 4 are an integral casting structure (through the integral casting method, the product can be formed quickly, and the overall stability is higher, which can make the product safer during use, and the overall quality of the product will be better, more in line with scientific and safe use requirements and standards), and the connecting frame 1, mounting seat 3 and mounting plate 4 are cast from steel; the side of the connecting frame 1 away from the mounting seat 3 is set to a concave structure, and the side of the connecting frame 1 away from the mounting seat 3 is provided with a symmetrical mounting groove 101, and the inner side wall of the mounting groove 101 is symmetrically provided with connecting grooves 102; the connecting groove 102 inside one of the mounting grooves 101 is higher than the connecting groove 102 inside the other mounting groove 101; a plurality of through holes 301 are provided at the top of the mounting seat 3; a plurality of evenly arranged bolt holes 401 are provided on the side wall of the mounting plate 4, thereby improving the strength and toughness of the slewing mechanism and improving the service life of the slewing mechanism.

[0035] In addition, in specific applications, the above-mentioned traction rod 2 is pressed into the connecting groove 102 in the connecting frame 1 by adopting a small interference fit, thereby reducing the shear force on the bolt during operation and use, and thus avoiding the risk of the bolt breaking due to the increase in shear force on the bolt, thereby ensuring the stability of the slewing mechanism during operation, and further ensuring the stability of the vehicle during operation; by adopting an integrated casting structure for the connecting frame 1, the mounting seat 3 and the mounting plate 4, the slewing mechanism is simpler in the production process, making the slewing mechanism more stable and stable during use, and the production cost is low, saving production costs, and then the connection to the connecting frame 1 can be achieved through two sets of crossed traction rods 2, and the installation steps are simple and convenient, thereby improving the installation efficiency of the staff.

[0036] In one embodiment, for the above-mentioned traction rod 2, the traction rod 2 is composed of a rod body 201 and two groups of metal joint bearings 202 that cooperate with the connecting groove 102 (in addition, in specific applications, the above-mentioned metal joint bearings 202 have the characteristics of large load capacity, impact resistance, corrosion resistance, wear resistance, self-aligning, good lubrication, deflection, torsion, etc., and can adapt to the directional relative movement between the two vehicles, and can withstand radial loads, axial loads or combined loads of radial and axial loads at the same time), and the metal joint bearings 202 are arranged in the side walls at both ends of the rod body 201, and a cross-shaped structure is arranged between the two groups of rod bodies 201; the metal joint bearings 202 and the connecting groove 102 are connected by bolts, and the two axle bridges 6 are flexibly connected by a cross double rod, which can realize the transmission of traction and braking force, buffer the traction and braking impact, and release the directional movement between the two vehicles, and can ensure the stability of the vehicle during operation.

[0037] In addition, in specific applications, the above-mentioned tie rod body 201 is forged with high-strength alloy steel, which can make the tie rod body 201 have the characteristics of high strength, can improve the use strength of the rotating mechanism, and improve the service life. The two traction tie rods 2 have a reasonable vertical distance (H), which not only occupies less space to achieve a low floor of the vehicle, but also can adapt to the relative rolling movement between the two axles 6 (car body). The traction braking force of the two axles can be transmitted through the tie rod body 201, and the deflection angle of the metal joint bearing 202 can be used to adapt to the rotation angle and torsion angle between the two axles 6 (car body) to adapt to the vertical movement between the two axles 6 (car body).

[0038] In one embodiment, for the above-mentioned slewing stop 5, the number of the slewing stop 5 is set to four, and the slewing stop 5 is connected to the end of the connecting frame 1 by bolts, so that the rotation angle between the two axle bridges 6 will not be too large, thereby preventing the two axle bridges 6 from folding due to a large rotation angle.

[0039] In addition, in specific applications, the above-mentioned slewing stopper 5 is made of metal and rubber vulcanization, so that it can be ensured that the slewing stopper 5 can limit the rotation angle of the two-axle bridge (vehicle body) during use. By arranging the slewing stopper 5 at the end of the connecting frame 1, it is not only possible to avoid the two-axle bridge from having a large rotation angle, thereby causing the two vehicle bodies to fold, but also the maximum rotation angle between the two axle bridges 6 can be adjusted by adjusting the slewing stopper 5, thereby ensuring the stability of the bogie and the stability of the vehicle during operation.

[0040] like Figure 5-Figure 6 As shown, according to another embodiment of the present invention, a bogie is provided, including a plurality of axle bridges 6 and running wheels 7 located at both ends of the axle bridges 6, and also including a double-pull rod slewing mechanism. The axle bridges 6 and the mounting plates 4 are connected by bolts, which can meet the safety operation requirements of rubber-tyred low-floor vehicles in terms of strength and life, and realize the low-floor function and vehicle connection through the bogie.

[0041] In addition, in a specific application, the above-mentioned axle bridges 6 are provided in two numbers, and among the two axle bridges 6, one is a motor vehicle axle bridge, and the other is a trailer axle bridge.

[0042] In order to facilitate understanding of the above technical solutions of the present invention, the working principle or operation mode of the present invention in the actual process is described in detail below.

[0043] In actual application, when the above-mentioned bogie is connected to the vehicle and operates, the crossed double pull rods can realize the transmission of traction and braking force, buffer the traction and braking impact, and release the directional movement between the two vehicles. When the slewing mechanism needs to be maintained, it can be done by disassembling the mounting plate 4 and the axle bridge 6. The operation is simple and convenient. When the two axle bridges 6 turn an angle during the operation of the bogie, the cooperation of the two slewing stops 5 on the same side can limit the turning angle between the two axle bridges 6 from being too large, thereby ensuring the stability of the bogie during operation.

[0044] In summary, with the help of the above-mentioned technical scheme of the present invention, the present invention has a simple and reliable structure and low cost. The traction force and braking force are jointly transmitted by cross-connecting the two traction rods, and at the same time, the requirements of the two vehicles passing through small curves can be met, and the metal joint bearing 202 has good torsional deflection characteristics, which can adapt to vehicle ramps, steps, curves and other road conditions; the two traction rods 2 are respectively installed on the upper and lower sides of the connecting frame 1 and leave a certain vertical gap, which can adapt to the relative rolling movement between the two vehicle bodies. By providing four slewing stops 5, the two-axle bridge (car body) can be prevented from rotating at an excessive angle; at the same time, the cross double-tie rod slewing mechanism is a self-contained module that can be disassembled separately, which is convenient for later inspection and maintenance, and is conducive to the inspection and maintenance of the bogie by the staff in the later stage, thereby improving work efficiency; the present invention can meet the safety operation requirements of the rubber-tyred low-floor vehicle in terms of strength and life, and realize the low-floor function and vehicle connection through the bogie; the two-axle bridge is flexibly connected by the cross double tie rod, so as to realize the transmission of traction and braking force, buffer the traction and braking impact, and release the directional movement between the two vehicles, and replace the slewing bearing structure of the traditional articulated bogie to realize the rotation between the two car bodies, which is convenient for promotion and use; the present invention adopts an integral casting structure for the connecting frame 1, the mounting seat 3 and the mounting plate 4, so that the slewing mechanism is simpler in the production and manufacturing process, and the slewing mechanism is more stable and stable during use, and the manufacturing cost is low, saving the production cost, and then the connection of the connecting frame 1 can be realized by two sets of cross traction rods 2, and the installation steps are simple and convenient, thereby improving the installation efficiency of the staff.

[0045] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-pull rod slewing mechanism, comprising two sets of symmetrically arranged connecting frames (1), characterized in that: A plurality of traction rods (2) are arranged between the two groups of connecting frames (1), a mounting seat (3) is arranged on one side of each connecting frame (1), a mounting plate (4) is arranged on one side of the mounting seat (3), and a rotation stopper (5) is arranged at the end of the other side of the connecting frame (1); A side of the connecting frame (1) away from the mounting seat (3) is arranged as a concave structure, and a symmetrical mounting groove (101) is provided on the side of the connecting frame (1) away from the mounting seat (3), and a connecting groove (102) is symmetrically provided on the inner side wall of the mounting groove (101); The traction rod (2) is composed of a rod body (201) and two sets of metal joint bearings (202) matched with the connection groove (102), and the metal joint bearings (202) are arranged in the side walls at both ends of the rod body (201), and a cross-shaped structure is arranged between the two sets of rod bodies (201); The metal joint bearing (202) and the connecting groove (102) are connected via bolts.

2. A double-pull rod slewing mechanism according to claim 1, characterized in that: The connecting frame (1), the mounting seat (3) and the mounting plate (4) are an integrally cast structure, and the connecting frame (1), the mounting seat (3) and the mounting plate (4) are cast from steel.

3. A double-pull rod slewing mechanism according to claim 2, characterized in that: The connection groove (102) inside one of the installation grooves (101) is higher than the connection groove (102) inside the other installation groove (101).

4. A double-pull rod slewing mechanism according to claim 3, characterized in that: A plurality of through holes (301) are formed at the top of the mounting seat (3).

5. The double-pull rod slewing mechanism according to claim 3, characterized in that: The side wall of the mounting plate (4) is provided with a plurality of evenly arranged bolt holes (401).

6. A double-pull rod slewing mechanism according to claim 1, characterized in that: The number of the rotation stops (5) is set to four, and the rotation stops (5) are connected to the end of the connecting frame (1) by means of bolts.

7. A bogie, characterized in that: It comprises a plurality of axle bridges (6) and running wheels (7) located at both ends of the axle bridges (6), and also comprises a double-pull rod slewing mechanism as claimed in any one of claims 1 to 5, wherein the axle bridges (6) are connected to the mounting plate (4) by bolts.

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