Compact central traction device and installation method thereof

Abstract

According to the compact type center traction device, the two traction pull rods are distributed on the two sides of the traction pin seat in the transverse direction in an aligned mode to form the center traction device arranged in a rectangular shape, the shape of the center traction device is matched with that of a mounting space corresponding to the center traction device, the longitudinal length of the center traction device is shortened, and the compactness of the structure is improved; the arrangement requirement of a compact space is met; the two traction pull rods are aligned in the transverse direction, the length of the traction pull rods is increased, the deflection and torsion angle of the pull rod spherical hinge when a vehicle body and a bogie generate transverse and vertical displacement is reduced, and the fatigue life of the pull rod spherical hinge is prolonged. The transverse backstops are arranged in the space between the two traction pull rods, the external space is not occupied, the center pin structure can be effectively reduced, the vertical size of the center traction device is reduced, the structural compactness is improved, the transverse backstops with different transverse heights can be installed according to the transverse limiting requirements of a vehicle body and a bogie under different load working conditions, and the stability of the vehicle body is improved. And the reliability of transverse limiting is improved.

Description

Technical Field

[0001] This invention relates to a compact center traction device and its installation method, belonging to the technical field of rail vehicle traction devices. Background Technology

[0002] The central traction device is installed between the car body and bogie of a rail vehicle to connect the car body and bogie, transmit traction and braking forces, and buffer the impact and vibration caused by the wheels. The central traction device includes a traction pin seat, a central traction ball joint pressed into the traction pin seat, and a traction rod. Both ends of the traction rod are press-fitted with tie rod ball joints, and a central pin is assembled in the central traction ball joints. One end of the tie rod is connected to the traction pin seat, and the other end is connected to the bogie. The central pin is connected to the car body. The traction rod is arranged in a Z-shape on both sides of the traction pin seat, forming a central traction device. Figure 6 As shown. A lateral stop is designed at the upper end of the center pin, and the lateral displacement between the bogie and the car body is limited by the contact between the lateral stop and the bogie. Current center traction devices still have the following drawbacks: 1. The central traction device is installed in the middle of the bogie frame. The installation space is generally within a rectangular frame. There are requirements for the outer contour dimensions of the central traction device, and its operating space must also be considered. The overall length of the central traction device is relatively large. If the arrangement space is insufficient, it is easy to cause interference to the central traction device during the deformation process. Therefore, the central traction device has high requirements for the arrangement space and a large space occupancy rate, making it difficult to meet the arrangement requirements of a compact space.

[0003] 2. A traction body is assembled on the upper end of the center pin and connected to the vehicle body through the traction body. A lateral stop is connected on the traction body, which results in a large structure at the upper end of the center pin. This increases the vertical dimension of the center traction device and further increases the volume space occupied by the center traction device.

[0004] 3. The traction rod connects the traction pin seat and the bogie. To accommodate the installation space, the traction rod is relatively short. When the car body and bogie undergo lateral and vertical displacement, the traction rod ball joint will experience a large deflection and torsional angle, which will shorten the fatigue life of the traction rod ball joint.

[0005] 4. The traction rod assembly is connected by bolts through the threaded hole of the traction pin seat. During traction and braking operations, the threaded hole of the traction pin seat bears a large load. There is a risk that the threaded hole of the traction pin seat may be deformed due to repeated tightening and loosening of the bolts, which may lead to irreparable damage and scrap. Summary of the Invention

[0006] The compact center traction device provided by this invention shortens the longitudinal length of the center traction device, improves the structural compactness, and reduces the space requirements for the arrangement of the center traction device to meet the requirements of compact space layout; it increases the length of the traction rod, reduces the deflection and torsional angles of the tie rod ball joint when the car body and bogie undergo lateral and vertical displacement, and extends the fatigue life of the tie rod ball joint; it utilizes the space between the two traction rods to arrange lateral stops, improving structural compactness; and it can install lateral stops of different lateral heights according to the lateral limiting requirements of the car body and bogie under different load conditions, improving the reliability of lateral limiting. This invention also provides an installation method for the compact center traction device.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A compact center traction device includes a traction pin seat, a center traction ball joint press-fitted at the center of the traction pin seat and connected to the car body, and two longitudinally arranged traction rods. Both ends of the traction rods are press-fitted with tie rod ball joints. One end of the tie rod is connected to the traction pin seat, and the other end is connected to the bogie. The device is characterized in that the two traction rods are laterally aligned and distributed on both sides of the traction pin seat. The tie rod ball joints connected to the traction pin seat and the tie rod ball joints connected to the bogie are laterally aligned. A lateral stop is fixed on the traction pin seat, located between the two traction rods. The lateral stop abuts against the bogie as the car body and the bogie move laterally relative to each other.

[0008] Preferably, the traction pin seat has two double-layer connecting arms that extend toward the end of the traction rod and are parallel to the traction rod. The number of double-layer connecting arms is two and they are distributed on both sides of the traction pin seat. The two double-layer connecting arms extend in opposite directions, and the free ends of the two double-layer connecting arms are respectively connected to the ball joint of the rod.

[0009] Preferably, the double-layer connecting arm has an integrally formed connecting threaded sleeve corresponding to the upper and lower ends of the tie rod ball joint.

[0010] Preferably, the lateral stop is fixed on the double-layer connecting arm and is located between two tie rod ball joints aligned laterally.

[0011] Preferably, the ball joint at one end of the traction rod is fixed to the mounting seat on the bogie, and the mounting seat extends into the space between two laterally aligned ball joints and is laterally aligned with the lateral stop.

[0012] Preferably, there are two lateral stops, and the two lateral stops are arranged in opposite directions, with each lateral stop aligned with a mounting base in the lateral direction.

[0013] Preferably, the lateral stop is formed by alternating layers of metal and rubber vulcanized, and a wear-resistant plate opposite to the mounting base is fixed on the free end face of the lateral stop.

[0014] Preferably, an annular positioning groove is formed in the central hole of the traction pin seat, the central traction ball joint is pressed into the central hole of the traction pin seat, and the open retaining ring is assembled in the annular positioning groove and abuts against the upper end face of the central traction ball joint.

[0015] Preferably, the tie rod consists of a tie rod body with a rectangular cross-section and press-fit sleeves integrally formed at both ends of the tie rod body. The tie rod ball joint is press-fitted in the press-fit sleeve. The outer side of the tie rod body is tangent to the outer wall of the press-fit sleeve, and the inner side of the tie rod body is located on the lateral outer side of the double-layer connecting arm.

[0016] The installation method of the compact center traction device described above is characterized by the following: First, the length of the traction rod is designed according to the length of the installation space, the spacing between the two traction rods is designed according to the width of the installation space, and the lateral height of the lateral stop is designed according to the lateral limiting requirements between the car body and the bogie. Then, the tie rod ball joint is press-fitted onto the end of the traction rod, the lateral stop is installed on the traction pin seat, and the tie rod ball joint at one end of the traction rod is connected to the traction pin seat to assemble the compact center traction device. Next, the compact center traction device is placed in the installation space between the car body and the bogie, and the tie rod ball joint at the other end of the traction rod is connected to the bogie.

[0017] The beneficial effects of the invention are: The compact center traction device of the present invention has two traction rods laterally aligned on both sides of the traction pin seat. The ball joints connecting the traction pin seat and the bogie are also laterally aligned, forming a rectangular center traction device that adapts to the shape of the corresponding installation space. This shortens the longitudinal length of the center traction device, improves structural compactness, reduces the space requirements for its arrangement, and allows the length and width of the compact center traction device to be designed according to the dimensions of the corresponding installation space to reserve operating space during load-bearing and avoid interference during deformation, thus meeting the requirements of a compact space arrangement. The two traction rods are laterally aligned, and the length of the traction rods defines the center traction device. The longitudinal length is increased, the length of the traction rod is increased, the deflection and torsion angles of the tie rod ball joint when the car body and bogie undergo lateral and vertical displacement are reduced, and the fatigue life of the tie rod ball joint is extended. The lateral stop is fixed on the traction pin seat and placed between the two traction rods. The lateral stop is arranged in the space between the two traction rods, which does not occupy external space. Compared with the structure of placing the lateral stop on the upper end of the center pin, the center pin structure can be reduced, thereby reducing the vertical dimension of the center traction device, reducing the space occupation rate, and further improving the structural compactness. The lateral stop is installed on the traction pin seat, and lateral stops of different lateral heights can be installed according to the lateral limit requirements of the car body and bogie under different load conditions, thereby improving the reliability of lateral limit. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the compact center traction device of the present invention.

[0019] Figure 2 This is a schematic diagram of the components of a compact central traction device.

[0020] Figure 3 This is a schematic diagram of the traction pin seat.

[0021] Figure 4 This is a schematic diagram of a lateral stop.

[0022] Figure 5 A schematic diagram of press-fitted ball joints at both ends of the traction rod.

[0023] Figure 6 This is a schematic diagram of a Z-shaped central traction device in the prior art. Detailed Implementation

[0024] The following is combined Figures 1-5 The embodiments of the present invention will be described in detail below.

[0025] A compact center traction device includes a traction pin seat 1, a center traction ball joint 2 press-fitted at the center of the traction pin seat 1 and connected to the car body, and two longitudinally arranged traction rods 3. Both ends of the traction rods 3 are press-fitted with tie rod ball joints 4. One end of the tie rod ball joint 4 is connected to the traction pin seat 1, and the other end of the tie rod ball joint 4 is connected to the bogie. The device is characterized in that: the two traction rods 3 are laterally aligned and distributed on both sides of the traction pin seat 1, the tie rod ball joint 4 connected to the traction pin seat 1 and the tie rod ball joint 4 connected to the bogie are laterally aligned, and a lateral stop 5 is fixed on the traction pin seat 1. The lateral stop 5 is located between the two traction rods 3, and the lateral stop 5 abuts against the bogie as the car body and the bogie move laterally relative to each other.

[0026] The compact center traction device described above has two traction rods 3 laterally aligned on both sides of the traction pin seat 1. The ball joints 4 connecting the traction pin seat 1 and the ball joints 4 connecting the bogie are also laterally aligned, forming a rectangular center traction device that matches the shape of the corresponding installation space. This shortens the longitudinal length of the center traction device, improves structural compactness, reduces the space requirements for its arrangement, and allows for the design of the length and width of the compact center traction device according to the dimensions of the corresponding installation space. This design allows for sufficient running space during load-bearing and avoids interference during deformation, thus meeting the requirements of a compact space layout. The two traction rods 3 are laterally aligned, and the length of the traction rods 3 defines the length of the center traction device. The longitudinal length is increased, thereby reducing the deflection and torsion angles of the tie rod ball joint 4 when the car body and bogie undergo lateral and vertical displacement, and extending the fatigue life of the tie rod ball joint 4. A lateral stop 5 is fixed on the traction pin seat 1 and placed between the two traction rods 3. The lateral stop 5 is arranged in the space between the two traction rods 3, which does not occupy external space. Compared with the structure in which the lateral stop is placed on the upper end of the center pin, the center pin structure can be effectively reduced, thereby reducing the vertical dimension of the center traction device, reducing the space occupancy rate, and further improving the structural compactness. The lateral stop 5 is mounted on the traction pin seat 1, and lateral stops of different lateral heights can be installed according to the lateral limiting requirements of the car body and bogie under different load conditions, thereby improving the reliability of lateral limiting.

[0027] The traction pin seat 1 has two double-layer connecting arms 11 that extend toward the end of the traction rod 3 and are parallel to the traction rod 3. The number of double-layer connecting arms 11 is two and they are distributed on both sides of the traction pin seat 1. The two double-layer connecting arms 11 extend in opposite directions, and the free ends of the two double-layer connecting arms 11 are respectively connected to the ball joint of the rod. As shown in the figure, the traction pin seat 1 has a double-layer connecting arm 11 extending towards the end of the traction rod 3. The two double-layer connecting arms 11 extend in opposite directions. The tie rod ball joints 4 at one end of each of the two traction rods 3 are connected to a double-layer connecting arm 11, forming a connection between the traction pin seat 1 and the traction rod 3. The distance between the free ends of the two double-layer connecting arms 11 is adapted to the length of the traction rod 3. The traction pin seat 1 is connected between the two traction rods 3. The length of the traction rod 3 is the length of the central traction device, forming a rectangular central traction device. Compared with the Z-shaped central traction device in the prior art, the length of the central traction device can be effectively shortened. By utilizing the lateral alignment of the two traction rods, the length of the traction rod 3 can be increased as much as possible, reducing the force on the tie rod ball joint 4 at the end of the traction rod 3 during the load-bearing process, thereby extending its service life.

[0028] The double-layer connecting arm 11 is integrally formed with connecting threaded sleeves 12 corresponding to the upper and lower ends of the tie rod ball joint 4. The connecting threaded sleeves 12 are bolted to the tie rod ball joint 4, which improves the connection convenience between the tie rod ball joint 4 and the traction pin seat 1, and also facilitates the replacement of bolts. The connecting threaded sleeves 12 are through holes, which makes the force more even and extends the service life.

[0029] The lateral stop 5 is fixed to the double-layer connecting arm 11 and located between two laterally aligned tie rod ball joints 4. The lateral stop 4 is also fixed to the double-layer connecting arm 11 and moves together with the traction pin seat 1. It is located between the two laterally aligned tie rod ball joints 4, does not occupy the external space of the central traction pin seat, and does not increase the vertical dimension of the traction pin seat. The lateral stop 4 is easy to install and remove. Lateral stops 5 with different lateral heights can be installed according to the lateral limiting requirements to improve the reliability of lateral limiting.

[0030] In this design, the ball joint 4 at one end of the traction rod 3 is fixed to the mounting seat 100 on the bogie. The mounting seat 100 extends between the two laterally aligned ball joints 4 and is laterally aligned with the lateral stop 5. The lateral alignment of the mounting seat 100 and the lateral stop 4 creates a lateral limit on the car body and bogie when the lateral stop 4 contacts the mounting seat 100, thus limiting the relative lateral displacement of the car body and bogie. This effectively utilizes the space between the two traction rods 3 to limit the lateral relative movement of the car body and bogie, avoiding the need to place the lateral stop on the upper end of the center pin of the center traction ball joint 2, and effectively reducing the vertical dimension of the center traction device.

[0031] There are two lateral stops 5, and the two lateral stops 5 are arranged in opposite directions. Each lateral stop 5 is aligned laterally with a mounting seat 100. As shown in the figure, a lateral stop 5 is fixed on each double-layer connecting arm 11 to ensure that when the car body moves laterally relative to the bogie, the two lateral stops 5 contact the mounting seat 100 on the bogie synchronously. The two lateral stops 5 bear the load evenly, which improves the stability and reliability of the lateral limit.

[0032] The lateral stop 5 is formed by alternating layers of metal and rubber through vulcanization. A wear-resistant plate 51, opposite to the mounting base 100, is fixed to the free end face of the lateral stop 5. The lateral stop 5, being a vulcanized combination of metal and rubber layers, provides cushioning for the lateral relative movement of the car body and bogie, preventing rigid collisions. The wear-resistant plate 51 protects the lateral stop 5, reducing wear and extending its service life.

[0033] In this design, an annular positioning groove 13 is formed in the central hole of the traction pin seat 1. The central traction ball joint 2 is pressed into the central hole of the traction pin seat, and the open retaining ring 6 is assembled in the annular positioning groove 13 and abuts against the upper end face of the central traction ball joint 2. The open retaining ring 6 forms an axial position for the central traction ball joint 2. The open retaining ring 6 is not easy to loosen, does not occupy the external space of the traction pin seat 1, and is easy to install, thus improving the assembly convenience of the central traction device.

[0034] The traction rod 3 consists of a rectangular rod body 31 and press-fit sleeves 32 integrally formed at both ends of the rod body 31. The rod ball joint 4 is press-fitted into the press-fit sleeve 32. The outer side of the rod body 31 is tangent to the outer wall of the press-fit sleeve 32, and the inner side of the rod body 31 is located on the lateral outer side of the double-layer connecting arm 11. The rectangular cross-section of the rod body 31 improves the strength of the traction rod 3. Because a double-layer connecting arm is formed on the traction pin seat 1, the longitudinal length of the traction pin seat 1 is extended. To avoid interference between the traction rod 3 and the double-layer connecting arm 11 during movement, the shape of the traction rod 3 has been improved. The outer side of the rod body 31 is tangent to the outer wall of the press-fit sleeve 32, and the inner side of the rod body 31 is located on the lateral outer side of the double-layer connecting arm 11. This increases the strength of the traction rod 3 and avoids interference between the traction rod 3 and the traction pin seat 1 during movement.

[0035] The installation method of the compact center traction device described above is characterized in that: firstly, the length of the traction rod 3 is designed according to the length of the installation space, the distance between the two traction rods 3 is designed according to the width of the installation space, and the lateral height of the lateral stop is designed according to the lateral limiting requirements between the car body and the bogie. Then, the tie rod ball joint 4 is pressed onto the end of the traction rod 3, the lateral stop 5 is installed on the traction pin seat 1, and the tie rod ball joint 4 at one end of the traction rod 3 is connected to the traction pin seat 1 to assemble the compact center traction device. Next, the compact center traction device is placed in the installation space between the car body and the bogie, and the tie rod ball joint 4 at the other end of the traction rod 3 is connected to the bogie.

[0036] The installation method described above allows for the design of the length and width of the compact center traction device based on the dimensions of the corresponding installation space. This is because the length of the traction rod 3 is the longitudinal length of the compact center traction device, and the lateral distance between the two traction rods 3 is the lateral width of the compact center traction device. This design allows for sufficient operating space during the load-bearing process, avoids interference during deformation, meets the requirements of a compact space layout, and increases the length of the traction rod. It also reduces the deflection and torsion angles of the tie rod ball joint 4 when the car body and bogie experience lateral and vertical displacement, thus extending the fatigue life of the tie rod ball joint 4. Furthermore, based on the maximum lateral displacement requirement between the car body and bogie under load conditions, a lateral stop 5 of appropriate lateral height can be installed to improve the reliability of the lateral limit.

[0037] The technical solutions of the embodiments of the present invention have been fully described above with reference to the accompanying drawings. It should be noted that the described embodiments are only a part of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. A compact center traction device, comprising a traction pin seat, a center traction ball joint press-fitted at the center of the traction pin seat and connected to the vehicle body, and two longitudinally arranged traction rods, both ends of which are press-fitted with tie rod ball joints, one end of the tie rod being connected to the traction pin seat, and the other end being connected to the bogie, characterized in that: Two traction rods are laterally aligned on both sides of the traction pin seat. The ball joints of the traction rods connected to the traction pin seat and the ball joints of the traction rods connected to the bogie are laterally aligned. A lateral stop is fixed on the traction pin seat and is located between the two traction rods. The lateral stop abuts against the bogie as the car body and the bogie move laterally relative to each other.

2. The compact center traction device according to claim 1, characterized in that: The traction pin seat has two double-layer connecting arms that extend toward the end of the traction rod and are parallel to the traction rod. The number of double-layer connecting arms is two and they are distributed on both sides of the traction pin seat. The two double-layer connecting arms extend in opposite directions, and the free ends of the two double-layer connecting arms are respectively connected to the ball joint of the rod.

3. The compact center traction device according to claim 2, characterized in that: The double-layer connecting arm is integrally formed with connecting threaded sleeves corresponding to the upper and lower ends of the tie rod ball joint.

4. The compact center traction device according to claim 2, characterized in that: The lateral stop is fixed to the double-layer connecting arm and is located between two tie rod ball joints aligned laterally.

5. The compact center traction device according to claim 2, characterized in that: The tie rod ball joint at one end of the traction rod is fixed to the mounting seat on the bogie, and the mounting seat extends into the space between two tie rod ball joints aligned laterally and is aligned laterally with the lateral stop.

6. The compact center traction device according to claim 5, characterized in that: There are two lateral stops, and the two lateral stops are arranged in opposite directions, with each lateral stop aligned with a mounting base in the lateral direction.

7. The compact center traction device according to claim 5, characterized in that: The lateral stop is made of alternating layers of metal and rubber vulcanized together, and a wear-resistant plate opposite to the mounting base is fixed on the free end face of the lateral stop.

8. The compact center traction device according to claim 1, characterized in that: An annular positioning groove is opened in the center hole of the traction pin seat. The central traction ball joint is pressed into the center hole of the traction pin seat. The open retaining ring is assembled in the annular positioning groove and abuts against the upper end face of the central traction ball joint.

9. The compact center traction device according to claim 2, characterized in that: The tie rod consists of a tie rod body with a rectangular cross-section and press-fit sleeves integrally formed at both ends of the tie rod body. The tie rod ball joint is press-fitted in the press-fit sleeve. The outer side of the tie rod body is tangent to the outer wall of the press-fit sleeve, and the inner side of the tie rod body is located on the lateral outer side of the double-layer connecting arm.

10. The method for installing the compact center traction device according to any one of claims 1 to 9, characterized in that: First, design the length of the traction rod according to the length of the installation space, design the spacing between the two traction rods according to the width of the installation space, and design the lateral height of the lateral stop according to the lateral limiting requirements between the car body and the bogie. Then, press the traction rod ball joint onto the end of the traction rod, install the lateral stop on the traction pin seat, and connect the traction rod ball joint at one end of the traction rod to the traction pin seat to assemble the compact center traction device. Next, place the compact center traction device in the installation space between the car body and the bogie, and connect the traction rod ball joint at the other end of the traction rod to the bogie.

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