TW202007568A - A method for elastically connecting a U-shaped auxiliary frame and a diagonal cross-connecting rod and a connecting device - Google Patents

Abstract

A method for elastically connecting a U-shaped auxiliary frame and diagonal cross connecting rod and a connecting device. An elastic element is press-fitted in holes of both ends of the U-shaped secondary frame connected with diagonal cross connecting rods, so that the U-shaped auxiliary frame and the diagonal cross connecting rod are elastically connected, and the uneven stress on the diagonal cross connecting rod of the U-shaped auxiliary frame under different stress conditions in operation is alleviated through the elastic connection between the U-shaped auxiliary frame and the diagonal cross connecting rod, thereby ensuring the uniformity of stress on each connection point; The dynamic performance of bogie is improved as well as the stress of diagonal tie rod is improved.

Description

U-shaped auxiliary frame and diagonal cross connecting rod elastic connection method and connecting device

The invention relates to a component structure of a railway freight car and its connection method, in particular to a cross-connection method and device of a U-shaped sub-frame of a sub-frame type radial bogie and a diagonal tie rod; it belongs to the technical field of vehicle bogie manufacturing.

The sub-frame type radial bogie is a type of radial bogie, which is a wheelset radial device composed of two U-shaped subframes and diagonal tie rods connected crosswise to enable the bogie to obtain proper shear stiffness and Bending rigidity to improve the vehicle's running speed and curve passing performance. Among them, the wheel set radial device is one of the important components of the sub-frame radial bogie. The use of the wheel set radial device on the one hand increases the lateral connection rigidity between the wheel sets, on the other hand reduces the shaking rigidity of the wheel set, Coupling the movements of the front and rear wheel sets to each other, and without reducing the stability of the lateral movement of the bogie, the axis of the front and rear wheel sets can be oriented toward the radius of the track curve when the bogie passes through the curve, and the radial adjustment and reduction of the wheel set can be achieved The purpose of the wheel-rail force. At present, the sub-frame type radial bogie wheel set radial device in China is formed by the cross-connection of two sub-frame U-shaped arms and cross-connecting rods. The cross-connecting rods are used to transmit the horizontal interaction between the front and rear wheel sets and give full play to the bogie performance advantages. Key components; under normal circumstances, when the vehicle brakes urgently, the impact is the largest, and the cross-connecting rod is also the most stressed, so it is easy to cause problems, leading to cross-connecting rod traction failure, so how to improve the U-shaped arm and cross-connecting rod cross-connecting method The key to ensuring the normal use of the cross-connecting rod. It is necessary to study this.

Through patent search, there is no patent literature report that has the same technology as the present invention. The patents that have a certain relationship with the present invention mainly include the following:

1. The invention patent with publication number CN104325992A provides a structure that is easy to install and can realize a gapless elastic connection between the U-shaped sub-frame and the diagonal tie rod. The technical solution is as follows:

This solution is used to connect the U-shaped sub-frame and the diagonal tie rod. The key technology is to provide mandrel mounting holes at both ends of the diagonal tie rod. Press the elastic hinge in the mandrel mounting hole. The elastic hinge is in the middle of the mandrel. Set outer ring steel sleeve and inner ring steel sleeve, vulcanized rubber layer between mandrel, outer ring steel sleeve and inner ring steel sleeve, hinged hole is opened on U-shaped auxiliary frame, diagonal tie rod end with elastic hinge Located in the hinge hole. But the patent still has the following disadvantages:

1) The elastic spherical hinge is fixed to the inner cavity of the cross beam of the sub-frame through bolts. If the elastic spherical hinge cracks or fails during the operation, it is difficult for the inspector to find that there is a big safety hazard for daily driving;

2) The outer ring of the elastic bush is pressed into the round holes at both ends of the diagonal tie rod, and at the same time, the elastic bush is fixed to the inner cavity of the cross beam of the subframe by bolts. When the bogie passes through the curve, the elastic bush rubber has torsional stiffness, so It affects the radial passing performance of the two wheel pairs of the bogie and increases the rim wear.

3) The fixed position of the U-shaped sub-frame crossbeam and the diagonal tie rod is too close to the longitudinal centerline of the U-shaped sub-frame. When the vehicle has a longitudinal impact during braking, the U-shaped sub-frame crossbeam will be subjected to large forces, so the U-shaped sub-frame The design of the crossbeam needs to consider the effects of stiffness and strength, which causes the design weight of the U-shaped subframe to increase, thereby increasing the mass of the bogie under the spring and reducing the dynamic performance of the vehicle.

2, the paper "type steerable truck sub-frame cross-connecting rod stress analysis" OF: Henry Lee, Aimin, Pu, Liao Jun, Zhang Xianfeng; [J] "railway vehicle" Vol. 50, No. 4, 2012 In April of this year, the paper disclosed the use of SIMPACK simulation software to establish a dynamic model of a radial bogie with a subframe equipped with a subframe, and analyzed the stress of the cross-connecting rod under different working conditions. The results show that the force of the cross-connecting rod is the largest under the braking condition and is basically pulled; the difference between the force of the cross-connecting rod under the idling condition and the traction condition is small, and the phase change of the force is opposite; the cross-connect The frequency range of the rod force is within 10 Hz, which belongs to the middle and low frequency force member. However, the paper only analyzed the stress of the cross-connecting rod of the sub-frame radial bogie and pointed out its seriousness, but did not propose any specific technical solutions.

Through careful analysis of the above-mentioned patents and papers, although these patents or papers all involve the connection of the cross-connecting rods of the sub-frame radial bogies, some technical solutions or suggestions for improvement have been proposed, but through careful analysis, they have not proposed How to improve the specific joint part of the technical solution, so the problem that the connection joint of the cross-connecting rod of the sub-frame type radial bogie is easy to damage still exists, and further research is still needed.

The purpose of the present invention is to provide a new type of sub-frame type radial bogie cross-connecting rod for the problems that the connecting part of the existing sub-frame type radial bogie cross-connecting rod is easy to be damaged, the radial passing performance of the curve is poor, and maintenance and inspection are inconvenient. Method and device for connection, the method and device for connecting sub-frame type radial bogie cross-connecting rod can effectively improve the connection performance of sub-frame type radial bogie cross-connecting rod, and improve the sub-frame type radial bogie cross-connecting rod The service life of the connecting parts also improves the curve radial passing performance of the bogie, which is convenient for maintenance personnel to check and maintain.

In order to achieve this object, the present invention provides a method for elastically connecting a U-shaped sub-frame with diagonal cross-connecting rods, including the following steps. The two ends of the U-shaped sub-frame and the diagonal cross-connecting rod are connected by elastic elements, so that the U-shaped sub-frame and the diagonal cross-connecting rod are elastically connected, and the elastic positioning between the U-shaped sub-frame and the radial connecting rod is realized ; Through the elastic connection between the U-shaped sub-frame and the diagonal cross-connecting rod, the U-shaped sub-frame and the diagonal cross-connecting rod are relieved of different stress conditions during the operation of the U-shaped sub-frame and the diagonal cross-connecting rod. The uniform condition guarantees the uniformity of the stress of each connection point; while improving the stress condition of the diagonal tie rod, it also improves the dynamic performance of the bogie

Further, the two ends of the U-shaped sub-frame and the diagonal cross-connecting rod are connected by an elastic element. The connecting parts of the U-shaped sub-frame and the diagonal cross-connecting rod are respectively connected by an elastic combination bushing. The elastic part of the elastic combination bushing adjusts the gap between the U-shaped auxiliary frame and the diagonal cross-connecting rod in time; the elastic fixed bushing realizes the elastic fixed positioning of the U-shaped auxiliary frame and the diagonal cross-connecting rod.

Further, the elastic combined bushing includes a positioning bushing and an elastic bushing. The positioning bushing and the elastic bushing form an elastic combined bushing; the positioning bushing is a non-metallic rigid bushing.

Further, the elastic bushing includes a metal rigid bushing inner ring and a metallic steel bushing outer ring and a rubber elastic piece; a non-metallic rigid bushing is installed in the elastic bushing inner ring, an elastic bushing inner ring and a non-metallic The outer ring of the steel bushing adopts a conical structure; the non-metallic rigid bushing is a conical bushing, and the column on the upper part of the U-shaped sub-frame is also a conical column. The non-metallic rigid conical bushing is fixed in a U-shape through a nut The conical column on the upper part of the sub-frame is positioned by screw fastening, which is convenient for accurate positioning of the diagonal pull rod and easy disassembly for maintenance.

Further, the taper column on the sub-frame is positioned above the U-shaped sub-frame. The fixed position of the U-shaped sub-frame crossbeam and the radial connecting rod is close to the intersection position of the two longitudinal beams and the transverse beam of the U-shaped subframe. The vehicle is braking When a longitudinal impact occurs during the process, the U-shaped sub-frame beams have less stress, which improves the U-shaped sub-frame beams.

Further, the elastic connection is provided with elastic bushing mounting holes at both ends of the diagonal tie rod, the elastic bushing is press-fitted in the elastic bushing mounting hole, and the cone column is welded and fixed on the upper part of the U-shaped sub-frame, with The ends of the diagonal tie rods with elastic bushings are put into the cone column; the elastic deformation of the elastic bushings improves the elastic connection between the U-shaped sub-frame and the diagonal cross-connecting rods.

An elastic connecting device for U-shaped auxiliary frame and diagonal cross connecting rod includes U-shaped auxiliary frame and diagonal cross connecting rod. Two ends of the diagonal cross connecting rod are connected to the U-shaped auxiliary frame by connecting pieces. The connecting piece is an elastic element, and the U-shaped auxiliary frame and the diagonal cross connecting rod are elastically connected and fixedly positioned by the elastic element.

Further, the elastic element is an elastic rubber-metal composite element, which includes a positioning bush and an elastic bush. The positioning bush and the elastic bush are combined to form an elastic combined bush; the positioning bush is a non-metallic rigid bush.

Further, the elastic bushing includes a metal rigid bushing inner ring and a metal steel bushing outer ring and a rubber elastic piece; a non-metallic rigid bushing is installed in the elastic bushing inner ring, an elastic bushing inner ring and a non-metallic The outer ring of the steel bushing adopts a conical structure; the non-metallic rigid bushing is a conical bushing, and the column on the upper part of the U-shaped sub-frame is also a conical column. The non-metallic rigid conical bushing is fixed in a U-shape through a nut The conical column on the upper part of the sub-frame is positioned by screw fastening, which is convenient for accurate positioning of the diagonal pull rod and easy disassembly for maintenance.

Further, the cone column on the sub-frame is positioned above the U-shaped sub-frame; elastic bushing mounting holes are provided at both ends of the diagonal tie rod, and the elastic bush is press-fitted in the elastic bushing mounting hole. A cone-shaped column mounting and positioning hole is formed on the subframe, and the cone-shaped column is placed into the mounting and positioning hole to achieve positioning by welding. The elastic bushing is secured by the non-metallic rigid cone-shaped bushing and the nut through the threaded connection on the cone-shaped column. Through the elastic deformation of the elastic bushing, the elastic connection between the U-shaped sub-frame and the diagonal cross-connecting rod is improved; the elastic bushing is a vulcanized rubber layer between the outer ring steel sleeve and the inner ring steel sleeve.

Further, the cone column on the sub-frame is positioned above the U-shaped sub-frame; elastic bushing mounting holes are provided at both ends of the diagonal tie rod, and the elastic bush is press-fitted in the elastic bushing mounting hole. A cone-shaped column mounting and positioning hole is formed on the subframe, and the cone-shaped column is placed into the mounting and positioning hole to achieve positioning by welding. The elastic bushing is secured by the non-metallic rigid cone-shaped bushing and the nut through the threaded connection on the cone-shaped column. . The connection structure is completely placed on the upper part of the sub-frame. During the maintenance process, the maintenance personnel can check without dead corners, find faults in time, and eliminate potential safety hazards.

The advantages of the present invention are:

1. The elastic bushes and non-metallic steel bushes at both ends of the radial connecting rod of the present invention are positioned above the U-shaped sub-frame through a cone column fixed on the U-shaped sub-frame, which is convenient for maintenance personnel to check and repair.

2. The elastic bushing of the present invention realizes the elastic positioning between the U-shaped auxiliary frame and the radial connecting rod, while improving the dynamic performance of the bogie, and improving the stress condition of the diagonal rod and the cone column.

3. The non-metallic wear-resistant steel bushing of the present invention and the inner ring of the elastic bushing have a small gap, which can realize the free rotation between the sub-frame and the radial connecting rod, and truly realize the bogie wheel pair running on the curve Without resistance through. Reduce rim wear.

4. The inner ring of the elastic bushing and the inner and outer ring of the non-metallic steel bushing of the invention adopt a tapered structure, which is convenient for the assembly and disassembly of the radial connecting rod.

5. The fixed position of the U-shaped subframe crossbeam and the radial connecting rod of the present invention is close to the intersection position of the two longitudinal beams and the transverse beam of the U-shaped subframe. When the vehicle is subjected to longitudinal impact during braking, the U-shaped subframe crossbeam is stressed Smaller, improve the stress of U-shaped sub-frame beam. The U-shaped sub-frame has a smaller design weight, which reduces the unsprung mass of the vehicle and improves the dynamic performance of the vehicle.

In order to make the above-mentioned features and advantages of the present invention more obvious and understandable, the embodiments are specifically described below in conjunction with the accompanying drawings for detailed description as follows.

The present invention will be further described below with reference to the drawings and specific embodiments.

Example one

Referring to FIGS. 1-4, the present invention uses elastic elements to connect the U-shaped sub-frame 1 and the diagonal tie rod 3. The key technology is to press fit the elastic bushing 4 in the holes at both ends of the diagonal tie rod 3, and the interference fit will The elastic bushing 4 is fixed in the holes at both ends of the diagonal tie rod 3, and the inner ring of the elastic bushing 4 is assembled with a non-metallic rigid tapered bushing 5, and the non-metallic rigid tapered bushing 5 is fixed to the U-shaped subframe through nuts 6 and welding 1 The upper cone column 2 is positioned by screwing and fastening.

The metal outer ring of the elastic bush 4 is press-fitted into the holes at both ends of the diagonal rod 3 through interference fit, and the elastic bush 4 is fixed in the holes at both ends of the diagonal rod 3 through interference fit, so that the two elastic The bush 4 is integrated with the diagonal tie rod 3.

The elastic bushing 4 metal inner ring and the non-metallic rigid tapered bushing 5 outer ring are matched by a tenth (1/10) taper, and the fit gap between the two is controlled within the range of 0.001mm to 0.1mm . The diagonal rod 3 limits the upward displacement of the diagonal rod 3 through the taper of the metal inner ring of the elastic bush 4 and the outer ring of the non-metallic rigid tapered bush 5 with one tenth (1/10) during the stress.

The inner ring of the non-metallic rigid conical bushing 5 and the conical column 2 are matched by a taper of one-fifth (1/5), and the non-metallic rigid conical bushing is restricted by the nut 6 and the screw thread on the conical column 2 Set 5 upward displacement.

The cone column 2 is fixed on the U-shaped subframe 1 by welding.

Another advantage of matching the inner ring of the non-metallic rigid tapered bushing 5 with the tapered column 2 through a one-fifth (1/5) taper is to facilitate the positioning assembly and disassembly of the diagonal tie rod 3.

Example 2

The principle of the second embodiment is the same as that of the first embodiment, except that the structure adopted is slightly different. It is a U-shaped sub-frame and a diagonal cross-connecting rod elastic connection device, including a U-shaped sub-frame and a diagonal cross-connecting rod , The two ends of the diagonal cross connecting rod are connected to the U-shaped sub-frame through a connecting piece. The connecting piece is an elastic element, and the U-shaped auxiliary frame and the diagonal cross connecting rod are elastically connected and fixedly positioned by the elastic element.

Further, the elastic element is an elastic rubber-metal composite element, which includes a positioning bush and an elastic bush. The positioning bush and the elastic bush are combined to form an elastic combined bush; the positioning bush is a non-metallic rigid bush.

Further, the elastic bushing includes a metal rigid bushing inner ring and a metal steel bushing outer ring and a rubber elastic piece; a non-metallic rigid bushing is installed in the elastic bushing inner ring, an elastic bushing inner ring and a non-metallic The outer ring of the steel bushing is matched with a tapered structure; the non-metallic rigid bushing is a tapered bushing, the column on the upper part of the U-shaped sub-frame is also a tapered column, and the non-metallic rigid tapered bushing is fixed in a U-shape through a nut The conical column on the upper part of the sub-frame is fastened with threads to achieve positioning, which is convenient for accurate positioning of the diagonal rod and convenient disassembly for maintenance.

Further, the cone column on the sub-frame is positioned above the U-shaped sub-frame; elastic bushing mounting holes are provided at both ends of the diagonal tie rod, and the elastic bush is press-fitted in the elastic bushing mounting hole. A cone-shaped column mounting and positioning hole is formed on the subframe, and the cone-shaped column is placed into the mounting and positioning hole to achieve positioning by welding. The elastic bushing is secured by the non-metallic rigid cone-shaped bushing and the nut through the threaded connection on the cone-shaped column. The elastic deformation of the elastic bushing improves the elastic connection between the U-shaped subframe and the diagonal cross-connecting rod; the elastic bushing is a vulcanized rubber layer between the outer ring steel sleeve and the inner ring steel sleeve.

Further, the taper column on the sub-frame is positioned above the U-shaped sub-frame; elastic bushing mounting holes are provided at both ends of the diagonal rod, and the elastic bush is press-fitted in the elastic bushing mounting hole. A cone-shaped column mounting and positioning hole is formed on the subframe, and the cone-shaped column is placed into the mounting and positioning hole to achieve positioning by welding. The elastic bushing is secured by the non-metallic rigid cone-shaped bushing and the nut through the threaded connection on the cone-shaped column. . The connection structure is completely placed on the upper part of the sub-frame. During the maintenance process, the maintenance personnel can check without dead corners, find faults in time, and eliminate potential safety hazards.

The above-listed embodiments are only a clear and complete description of the technical solution of the present invention in conjunction with the drawings; obviously, the described embodiments are only a part of the embodiments of the present invention, but not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Through the description of the above embodiments, it can be known that the present invention also relates to a method for elastically connecting a U-shaped sub-frame with diagonal cross-connecting rods, including the following steps. The two ends of the U-shaped sub-frame and the diagonal cross-connecting rod are connected by elastic elements, so that the U-shaped sub-frame and the diagonal cross-connecting rod are elastically connected, and the elastic positioning between the U-shaped sub-frame and the radial connecting rod is realized ; Through the elastic connection between the U-shaped sub-frame and the diagonal cross-connecting rod, the U-shaped sub-frame and the diagonal cross-connecting rod are relieved of different stress conditions during the operation of the U-shaped sub-frame and the diagonal cross-connecting rod. The uniform condition ensures the uniformity of the stress of each connection point; while improving the dynamic performance of the bogie, the stress condition of the diagonal tie rod is also improved.

Further, the two ends of the U-shaped sub-frame and the diagonal cross-connecting rod are connected by elastic elements. The connecting parts of the U-shaped sub-frame and the diagonal cross-connecting rod are respectively connected by an elastic combination bushing. The elastic part of the elastic combination bushing adjusts the gap between the U-shaped auxiliary frame and the diagonal cross-connecting rod in time; the elastic fixed bushing realizes the elastic fixed positioning of the U-shaped auxiliary frame and the diagonal cross-connecting rod.

Further, the elastic combined bushing includes a positioning bushing and an elastic bushing. The positioning bushing and the elastic bushing form an elastic combined bushing; the positioning bushing is a non-metallic rigid bushing.

Further, the elastic bushing includes a metal rigid bushing inner ring and a metal steel bushing outer ring and a rubber elastic member; a non-metallic rigid bushing is installed in the elastic bushing inner ring, an elastic bushing inner ring and a non-metallic bushing The outer ring of the metallic steel bushing adopts a conical structure; the non-metallic rigid bushing is a conical bushing, and the column on the upper part of the subframe is also a conical column. The non-metallic rigid conical bushing is fixed in a U shape by a nut. The conical column on the upper part of the sub-frame is positioned by screw fastening, which is convenient for accurate positioning of the diagonal pull rod and easy disassembly for maintenance.

Further, the taper column on the sub-frame is positioned above the U-shaped sub-frame. The fixed position of the U-shaped sub-frame crossbeam and the radial connecting rod is close to the joint position of the two longitudinal beams and the transverse beam of the U-shaped sub-frame. When a longitudinal impact occurs during braking, the U-shaped sub-frame beams are subjected to less stress, which improves the U-shaped sub-frame beams.

Further, the elastic connection is provided with elastic bushing mounting holes at both ends of the diagonal tie rod, the elastic bushing is press-fitted in the elastic bushing mounting hole, and a hinge hole is opened on the U-shaped sub-frame, with The ends of the diagonal rods of the elastic bushing are located in the hinge holes; the elastic deformation of the elastic bushing improves the elastic connection between the U-shaped sub-frame and the diagonal cross-connecting rod.

Further, the elastic bushing includes a metal rigid bushing inner ring and a metal steel bushing outer ring and a rubber elastic member; a non-metallic rigid bushing is installed in the elastic bushing inner ring, an elastic bushing inner ring and a non-metallic bushing The outer ring of the metallic steel bushing adopts a conical structure; the non-metallic rigid bushing is a conical bushing, and the column on the upper part of the subframe is also a conical column. The non-metallic rigid conical bushing is fixed in a U shape by a nut. The conical column on the upper part of the sub-frame is positioned by screw fastening, which is convenient for accurate positioning of the diagonal pull rod and easy disassembly for maintenance.

Further, the taper column on the sub-frame is positioned above the U-shaped sub-frame; elastic bushing mounting holes are provided at both ends of the diagonal rod, and the elastic bush is press-fitted in the elastic bushing mounting hole. A cone-shaped column mounting and positioning hole is formed on the subframe, and the cone-shaped column is placed into the mounting and positioning hole to achieve positioning by welding. The elastic bushing is secured by the non-metallic rigid cone-shaped bushing and the nut through the threaded connection on the cone-shaped column. . The connection structure is completely placed on the upper part of the sub-frame. During the maintenance process, the maintenance personnel can check without dead corners, find faults in time, and eliminate potential safety hazards.

The advantages of the present invention are:

1. The elastic bushes and non-metallic steel bushes at both ends of the radial connecting rod of the present invention are positioned above the U-shaped sub-frame through a cone column fixed on the U-shaped sub-frame for easy inspection.

2. The elastic bushing of the present invention realizes the elastic positioning between the U-shaped auxiliary frame and the radial connecting rod, while improving the dynamic performance of the bogie, it also improves the stress condition of the diagonal rod and the cone column.

3. The non-metallic wear-resistant steel bushing of the present invention and the inner ring of the elastic bushing have a small gap, which can realize the free rotation between the sub-frame and the radial connecting rod, and truly realize the bogie wheel pair running on the curve Radial pass. Reduce rim wear.

4. The inner ring of the elastic bushing and the inner and outer ring of the non-metallic steel bushing of the invention adopt a tapered structure, which is convenient for the assembly and disassembly of the radial connecting rod.

5. The fixed position of the U-shaped subframe crossbeam and the radial connecting rod of the present invention is close to the intersection position of the two longitudinal beams and the transverse beam of the U-shaped subframe. When the vehicle is subjected to longitudinal impact during braking, the U-shaped subframe crossbeam is stressed Smaller, improve the stress of U-shaped sub-frame beam. The U-shaped sub-frame has a smaller design weight, which reduces the unsprung mass of the vehicle and improves the dynamic performance of the vehicle.

1‧‧‧U-shaped subframe 2‧‧‧Cone column 3‧‧‧ Diagonal rod 4‧‧‧Elastic bush 5‧‧‧ Non-metallic rigid tapered bushing 6‧‧‧Nut

FIG. 1 is a schematic diagram of the connection structure between the U-shaped subframe of the U-shaped subframe self-guided bogie of the present invention and the diagonal tie rod. 2 is a schematic view of the assembly of the connection structure of the present invention. Figure 3 is a schematic view of the elastic bushing of the present invention. 4 is a schematic diagram of the connection state of the U-shaped sub-frame of the present invention.

1‧‧‧U-shaped subframe

2‧‧‧Cone column

3‧‧‧ Diagonal rod

4‧‧‧Elastic bush

5‧‧‧ Non-metallic rigid tapered bushing

6‧‧‧Nut

Claims (10)

A method for elastically connecting a U-shaped sub-frame and a diagonal cross-connecting rod, comprising: connecting both ends of the U-shaped sub-frame and the diagonal cross-connecting rod through elastic elements, so that the U-shaped sub-frame and the diagonal cross-connecting rod become elastic Connection, to achieve the elastic positioning between the U-shaped sub-frame and the radial connecting rod; through the elastic connection of the U-shaped sub-frame and the diagonal cross-connecting rod, the connection point between the U-shaped sub-frame and the diagonal cross-connecting rod is relieved during operation. Uneven loading of the U-shaped sub-frame and diagonal cross-connecting rods under the force condition ensures the uniformity of the stress at each connection point; while improving the stress condition of the diagonal tie rods, the bogie dynamics performance is also improved . The elastic connection method of the U-shaped sub-frame and the diagonal cross-connecting rod as described in item 1 of the patent application scope, wherein the two ends of the U-shaped sub-frame and the diagonal cross-connecting rod are connected by an elastic element in the U The connecting parts of the shaped sub-frame and the diagonal cross-connecting rods are connected by elastic combination bushings respectively, and the gap between the U-shaped sub-frame and the diagonal cross-connecting rods is adjusted unevenly by the elastic members of the elastic combination bushings; The sleeve realizes the elastic fixed positioning of the U-shaped auxiliary frame and the diagonal cross connecting rod. The elastic connection method of U-shaped subframe and diagonal cross-connecting rod as described in item 2 of the patent application scope, wherein the elastic combination bushing includes a positioning bushing and an elastic bushing, which is composed of a positioning bushing and an elastic bushing It constitutes an elastic combined bushing; the positioning bushing is a non-metallic rigid bushing. The elastic connection method of U-shaped sub-frame and diagonal cross-connecting rod as described in item 3 of the patent application scope, wherein the elastic bushing includes a metal rigid bushing inner ring and a metal steel bushing outer ring and a rubber elastic piece ; Non-metallic rigid bushing is installed in the inner ring of the elastic bushing. The inner bushing of the elastic bushing and the inner and outer rings of the non-metallic steel bushing are tapered; the non-metallic rigid bushing is a tapered bushing. The upper part of the U-shaped subframe The column is also a tapered column, and the non-metallic rigid tapered bushing is fixed on the tapered column on the upper part of the U-shaped sub-frame through a nut, and is positioned by thread fastening, which is convenient for accurate positioning of the diagonal rod and convenient disassembly during maintenance. The elastic connection method of U-shaped sub-frame and diagonal cross-connecting rod as described in item 4 of the patent application scope, wherein the cone column on the sub-frame is positioned above the U-shaped sub-frame, the U-shaped sub-frame crossbeam and radial The fixed position of the connecting rod is close to the intersection position of the two longitudinal beams and the transverse beams of the U-shaped sub-frame. When the vehicle has a longitudinal impact during braking, the U-shaped sub-frame beams are less stressed, which improves the U-shaped sub-frame beams. The elastic connection method of the U-shaped sub-frame and the diagonal cross-connecting rod as described in item 1 of the patent scope, wherein the elastic connection is provided with elastic bushing mounting holes at both ends of the diagonal tie rod, and the elastic bushing An elastic bush is press-fitted in the mounting hole, and a taper column mounting positioning hole is opened on the U-shaped sub-frame. After the taper column is placed in the mounting positioning hole, positioning is achieved by welding. The elastic bushing passes through the non-metallic rigid taper bushing and The nut is fastened by the threaded connection on the cone column, and the elastic connection of the U-shaped sub-frame and the diagonal cross-connecting rod is improved by the elastic deformation of the elastic bush. An elastic connection device for U-shaped subframe and diagonal cross-connecting rod, including U-shaped subframe and diagonal cross-connecting rod, two ends of the diagonal cross-connecting rod are connected to the U-shaped sub-frame through connecting pieces, wherein the connection The piece is an elastic element, and the U-shaped auxiliary frame and the diagonal cross connecting rod are elastically connected and fixedly positioned by the elastic element. The U-shaped subframe and the diagonal cross-connecting rod elastic connection device as described in item 7 of the patent application scope, wherein the elastic element is an elastic rubber-metal composite element, including a positioning bush and an elastic bush, which consists of a positioning bush Combined with elastic bushing to form an elastic combined bushing; the positioning bushing is a non-metallic rigid bushing; the elastic bushing includes a rigid bushing inner ring and a rigid bushing outer ring; a non-metallic rigid is installed in the elastic bushing inner ring Bushing, elastic bushing inner ring and non-metallic rigid bushing outer ring adopt conical structure to match; non-metallic rigid bushing is conical bushing, the upper column of U-shaped subframe is also conical column, non-metallic rigid cone The shaped bush is fixed on the conical column at the upper part of the U-shaped subframe through a nut, and the positioning is achieved by screw fastening, which is convenient for the accurate positioning of the diagonal pull rod and easy disassembly during maintenance. As described in item 8 of the patent application scope, the U-shaped sub-frame and the diagonal cross-connecting rod elastic connection device, the non-metallic wear-resistant steel bushing and the inner sleeve of the steel bushing of the elastic bushing are matched with a small gap, which can be achieved The free rotation between the auxiliary frame and the radial connecting rod truly realizes the radial passage of the bogie wheel pair when running on the curve; the non-metallic steel bushing is a non-metallic wear-resistant bushing to extend the auxiliary frame and the diagonal The service life of the elastic connecting device of the cross connecting rod ensures the dynamic performance of the bogie and the safety of driving. The elastic connection device of U-shaped sub-frame and diagonal cross-connecting rod as described in Item 8 of the patent scope, wherein the cone column on the sub-frame is positioned above the U-shaped sub-frame; the elastic bushing is on the diagonal tie rod The end is provided with an elastic bushing mounting hole. The elastic bushing is press-fitted with the elastic bushing in the elastic bushing mounting hole. A taper column installation positioning hole is opened on the shaped subframe. After the cone column is placed in the installation positioning hole, it is welded. The method achieves positioning, and the elastic bushing is fastened by the non-metallic rigid tapered bushing and the nut through the threaded connection on the cone column; the elastic deformation of the elastic bushing improves the elastic connection between the U-shaped sub-frame and the diagonal cross-connecting rod; The elastic bushing is a rubber layer vulcanized between the outer ring steel sleeve and the inner ring steel sleeve elastic bushing; the cone column on the sub-frame is positioned above the U-shaped sub-frame; at both ends of the diagonal tie rod There is an elastic bushing installation hole in the part, the elastic bushing is press-fitted in the elastic production sleeve mounting hole, and a cone-pillar installation positioning hole is opened on the U-shaped sub-frame. After the cone-pillar is placed in the installation positioning hole, positioning is achieved by welding The elastic bushing is fastened through the non-metallic rigid tapered bushing and the nut through the threaded connection on the cone column.

Images