阅读说明：本技术 一种铁路货车转向架的一系悬挂定位系统 (Primary suspension positioning system of railway wagon bogie ) 是由 杨文朋 翟鹏军 卞学谦 刘寅华 于 2019-11-14 设计创作，主要内容包括：本发明公开了一种铁路货车转向架的一系悬挂定位系统,包括构架、悬挂装置和转臂,所述悬挂装置设于构架与转臂之间,所述转臂的底部连有轴箱盖,所述悬挂装置包括橡胶垫、外圆弹簧、内圆弹簧和橡胶弹簧,所述转臂的上端设有橡胶弹簧,所述橡胶弹簧的外侧套有与转臂连接的橡胶垫,所述橡胶垫的上端连有内圆弹簧,所述内圆弹簧的上端与构架底部之间设有间隙,所述内圆弹簧套在橡胶弹簧的外部,所述内圆弹簧的外部套有外圆弹簧,所述外圆弹簧的上端与构架连接,所述外圆弹簧的下端与橡胶垫连接,所述构架的下端连有导柱,所述导柱设于内圆弹簧的内部,导柱的下端与橡胶弹簧的上端设有间隙,所述转臂上设有用于固定轴承的定位结构。(The invention discloses a primary suspension positioning system of a railway freight car bogie, which comprises a framework, a suspension device and a rotating arm, wherein the suspension device is arranged between the framework and the rotating arm, the bottom of the rotating arm is connected with a shaft box cover, the suspension device comprises a rubber pad, an outer circle spring, an inner circle spring and a rubber spring, the upper end of the rotating arm is provided with the rubber spring, the outer side of the rubber spring is sleeved with the rubber pad connected with the rotating arm, the upper end of the rubber pad is connected with the inner circle spring, a gap is arranged between the upper end of the inner circle spring and the bottom of the framework, the inner circle spring is sleeved outside the rubber spring, the outer circle spring is sleeved outside the inner circle spring, the upper end of the outer circle spring is connected with the framework, the lower end of the outer circle spring is connected with the rubber pad, the lower end of the framework is connected with a guide pillar, the, and the rotating arm is provided with a positioning structure for fixing the bearing.)

1. The utility model provides a first series of suspension positioning system of railway freight car bogie, includes framework, linkage and rocking arm, linkage locates between framework and the rocking arm, the bottom of rocking arm even has axle box lid, its characterized in that: the suspension device comprises a rubber pad, an outer circle spring, an inner circle spring and a rubber spring, wherein the rubber spring is arranged at the upper end of the rotating arm, the rubber pad connected with the rotating arm is sleeved on the outer side of the rubber spring, the inner circle spring is connected to the upper end of the rubber pad, a gap is formed between the upper end of the inner circle spring and the bottom of the framework, the inner circle spring is sleeved outside the rubber spring, the outer circle spring is sleeved outside the inner circle spring, the upper end of the outer circle spring is connected with the framework, the lower end of the outer circle spring is connected with the rubber pad, a guide pillar is connected to the lower end of the framework, the guide pillar is arranged inside the inner circle spring, a gap is formed between the lower end of the guide pillar and.

2. A railway freight car truck primary suspension positioning system as claimed in claim 1, wherein: the upper end face and the lower end face of the rubber pad are both connected with connecting rings, the upper end of the connecting ring at the upper end is provided with a positioning ring, the positioning ring is sleeved on the outer side of the inner circular spring, and the outer circular spring is sleeved on the outer side of the positioning ring.

3. A tie down suspension locating system for a railway freight car truck as defined in claim 2, wherein: the lower end of the rubber spring is provided with a fixed plate, and the fixed plate is arranged between the rotating arm and a connecting ring at the lower end of the rubber pad.

4. A railway freight car truck primary suspension positioning system as claimed in claim 3, wherein: the up end of rocking arm is equipped with the fixed slot, the fixed plate is located in the fixed slot.

5. A suspension locating system for a railway freight car truck as claimed in any one of claims 1 to 4, wherein: the rubber spring is round table-shaped, and annular grooves are uniformly formed in the side wall of the rubber spring.

6. A railway freight car truck primary suspension positioning system as claimed in claim 1, wherein: the positioning structure is a first bearing groove arranged at the bottom of the rotating arm and a second bearing groove arranged at the upper end of the axle box cover, and the first bearing groove corresponds to the second bearing groove in position.

7. A railway freight car truck primary suspension positioning system as claimed in claim 6, wherein: and a front cover is covered on one side of the rotating arm and one side of the axle box cover.

8. A tie down suspension locating system for a railway freight car truck as defined in claim 7, wherein: the depth of the first bearing groove and the second bearing groove is 10 mm-15 mm.

9. A railway freight car truck primary suspension positioning system as claimed in claim 1, wherein: the gap between the upper end of the inner circle spring and the bottom of the framework is 5-16 mm.

10. A railway freight car truck primary suspension positioning system as claimed in claim 1, wherein: the clearance between the lower end of the guide post and the upper end of the rubber spring is 20-35 mm.

Technical Field

The invention relates to the technical field of railway freight cars, in particular to a primary suspension positioning system of a railway freight car bogie.

Background

Wheel set suspension positioning is the most critical system of railway vehicles, and particularly for vehicles with higher speed per hour, the longitudinal, transverse and vertical positioning rigidity and safety of the wheels are very important for smooth and safe running of the vehicles. The development of 160km/h fast trucks is being developed in China, and the application speed of the trucks is far higher than that of railway trucks, so that the trucks can reach the level of common passenger cars.

The conventional railway wagon in China has the characteristics of large empty and heavy wagon weight difference and low running speed, and the speed is generally lower than 100 km/h. Wheel sets are generally positioned by adopting a guide frame type clearance, bearings of the wheel sets are positioned by a bearing saddle and a side frame guide frame, and a rubber pad is sometimes arranged between the bearing saddle and the top surface of the guide frame. Because the railway freight car adopts the central suspension of the swing bolster as the main suspension, the rubber cushion has extremely high vertical rigidity and cannot be used as a primary suspension system, the defects of small positioning rigidity of bogie wheels, abrasion in clearance type positioning and large unsprung mass exist, and the stability and safety of operation cannot be ensured after the speed is increased, so that the running speed of the freight car cannot be further improved; the running speed of the railway passenger car is generally higher than 160km/h, the wheel set mainly adopts a rotating arm type suspension positioning device, the elastic positioning of the wheel set is realized, the unsprung mass is reduced, but the load of the railway passenger car is more consistent, no obvious empty and heavy car difference exists, the suspension system only has primary rigidity, the rubber element arranged in the suspension system only has a stopping function and does not play a bearing role, and the problem that the wheel set suspension system used as a freight car cannot adapt to obviously different empty and heavy car loads exists.

Therefore, the current suspension positioning system of the railway freight car and the passenger car cannot meet the requirement of the express freight car.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a primary suspension positioning system of a railway freight car bogie, which solves the problem that the original single-stage rigidity can not adapt to large load difference between empty wagon and heavy wagon

In order to realize the purpose, the invention provides the following technical scheme:

a primary suspension positioning system of a railway freight car bogie comprises a framework, a suspension device and a rotating arm, wherein the suspension device is arranged between the framework and the rotating arm, the bottom of the rotating arm is connected with a shaft box cover, the suspension device comprises a rubber pad, an outer circle spring, an inner circle spring and a rubber spring, the upper end of the rotating arm is provided with the rubber spring, the outer side of the rubber spring is sleeved with the rubber pad connected with the rotating arm, the upper end of the rubber pad is connected with the inner circle spring, a gap is arranged between the upper end of the inner circle spring and the bottom of the framework, the inner circle spring is sleeved outside the rubber spring, the outer circle spring is sleeved outside the inner circle spring, the upper end of the outer circle spring is connected with the framework, the lower end of the outer circle spring is connected with the rubber pad, the lower end of the framework is connected with a guide pillar, the guide, and the rotating arm is provided with a positioning structure for fixing the bearing.

Preferably, the upper end face and the lower end face of the rubber pad are both connected with connecting rings, the upper end of the connecting ring at the upper end is provided with a positioning ring, the positioning ring is sleeved on the outer side of the inner circular spring, and the outer circular spring is sleeved on the outer side of the positioning ring.

Preferably, the lower end of the rubber spring is provided with a fixed plate, and the fixed plate is arranged between the rotating arm and a connecting ring at the lower end of the rubber pad.

Preferably, the upper end surface of the rotating arm is provided with a fixing groove, and the fixing plate is arranged in the fixing groove.

Preferably, the rubber spring is round table-shaped, and annular grooves are uniformly formed in the side wall of the rubber spring.

Preferably, the positioning structure is a first bearing groove arranged at the bottom of the rotating arm and a second bearing groove arranged at the upper end of the axle box cover, and the first bearing groove corresponds to the second bearing groove in position.

Preferably, one side of the rotating arm and the axle box cover is covered with a front cover.

Preferably, the depth of the first bearing groove and the second bearing groove is 10 mm-15 mm.

Preferably, the gap between the upper end of the inner circle spring and the bottom of the framework is 5-16 mm.

Preferably, the gap between the lower end of the guide post and the upper end of the rubber spring is 20-35 mm.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention realizes the conversion from the positioning of the fastener to the rigid positioning of the high-speed and quick truck bogie wheel set, and realizes the operation reliability; through the multi-stage rigidity suspension device, the suspension capacity required by large load change of empty and heavy trucks of the truck is realized based on the rotating arm positioning structure, the problem that the original single-stage rigidity cannot adapt to large load difference of the empty and heavy trucks of the truck is solved, and the safety and the stability of high-speed running of the truck are met through the multi-stage rigidity.

2. According to the invention, the positioning structure of the limit bearing is formed by the side walls of the first bearing groove and the second bearing groove, so that the transverse rigid positioning of the bearing on the wheel shaft is realized, and the free rotation of the bearing sealing part is not influenced.

3. The rubber spring is designed into a circular truncated cone shape, so that the requirement that the inner circle spring does not interfere with the outer end of the rubber spring due to the fact that the angle between the rotating arm assembly and the opening angle of the framework is increased after the vehicle is unloaded is met, and the use reliability is improved.

4. The positioning ring is arranged on the connecting ring, so that the lower ends of the inner circular spring and the outer circular spring are fixed; in order to fix the rubber spring conveniently, a fixing groove is formed in the upper end face of the rotating arm, the fixing plate is arranged in the fixing groove, the fixing plate is pressed tightly in the fixing groove through a connecting ring at the lower end of the rubber pad to be fixed, the assembling mode is simple, and the fixing is reliable.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

fig. 3 is a schematic structural view of the rubber spring.

In the figure: 1-a framework; 2-an outer circle spring; 3-an inner circular spring; 4-guide pillar; 5-a rubber spring; 501-grooves; 502-a fixed plate; 6-rubber pad; 601-connecting ring; 602-a positioning ring; 7-rotating arm; 701-a first bearing groove; 702-a fixation slot; 8-front cover; 9-axle box cover; 901-second bearing groove; 10-a bearing; 11-axle.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in figure 1, a primary suspension positioning system of a railway freight car bogie comprises a framework 1, a suspension device and a rotating arm 7, wherein the suspension device is arranged between the framework and the rotating arm 7, one end of the rotating arm 7 is fixed on the bogie framework 1 through a ball hinge and a fastener by adopting the conventional technology, the other end of the rotating arm 7 adopts a split structure, the other end of the rotating arm 7 is provided with a semicircular mounting surface, and is fixed with a shaft box cover 9 which is also provided with the semicircular mounting surface through the fastener to form a complete shaft box hole for accommodating a wheel pair end bearing 10, as shown in figure 2, the bottom of the rotating arm 7 is provided with a first bearing groove 701, the shaft box cover 9 is provided with a second bearing groove 901 corresponding to the position of the first bearing groove 701, the depth of the first bearing groove 701 and the depth of the second bearing groove 901 are 10 mm-15 mm, the side walls of the first bearing groove 701 and the second bearing, thereby realizing the transverse rigid positioning of the bearing on the wheel shaft 11 without influencing the free rotation of the bearing sealing part, and the front cover 8 is assembled outside the rotating arm 7 through bolts and only used for sealing the axle box hole of the rotating arm 7 without bearing the transverse force of the bearing.

The suspension device comprises a rubber pad 6, an excircle spring 2, an inner circle spring 3 and a rubber spring 5, the upper end of the rotating arm 7 is provided with the rubber spring 5, the outer side of the rubber spring 5 is sleeved with the rubber pad 6 connected with the rotating arm 7, the rubber pad 6 is of an annular structure and is arranged on the top surface of the rotating arm 7 by using a bolt; the inner circle spring 3 and the outer circle spring 2 are steel springs which are nested inside and outside and are located on the top of the rubber pad 6, the free height of the outer circle spring 2 is higher than that of the inner circle spring 3 to form a two-stage stiffness spring set, only the outer circle spring 2 bears the load during idling, the height difference a exists between the outer circle spring 2 and the inner circle spring 3, a is 5-16 mm, the rubber spring 5 is located inside the rubber pad 6, and the lower end of the rubber spring 5 is fixed on the top surface of the rotating arm 7 and is tightly pressed by the bottom of the rubber pad 6; the lower extreme of framework 1 even has guide pillar 4, and inside circle spring 3 was located to guide pillar 4, and during the empty wagon, there was clearance b, b is 20 ~ 35mm in the top surface of rubber spring 5 and the bottom surface of guide pillar 4, and this clearance b is greater than clearance an. Because the freight train is empty, the heavy duty load difference is big, from empty to heavy duty, the angle of the top surface of the tumbler 7 and the horizontal plane changes greatly, the height of the rubber spring 5 is 100 mm-140 mm, in order to avoid the top of the rubber spring 5 from inclining outwards to contact with the inner round spring 3 when empty, as shown in fig. 3, the rubber spring 5 is designed into a round table shape, the requirement that the inner round spring 3 and the outer end of the rubber spring 5 cannot interfere due to the fact that the tumbler 7 forms and the opening angle of the framework 1 is enlarged after unloading the truck is met, and in order to improve the elasticity, the annular groove 501 is uniformly arranged on the side wall of the rubber spring 5.

In order to ensure the reliability of fixing the lower ends of the inner circular spring 3 and the outer circular spring 2, the upper end surface and the lower end surface of the rubber pad 6 are connected with a connecting ring 601, the upper end of the connecting ring 601 at the upper end is provided with a positioning ring 602, the positioning ring 602 is sleeved outside the inner circular spring 3, and the outer circular spring 2 is sleeved outside the positioning ring 602, so that the lower ends of the inner circular spring 3 and the outer circular spring 2 are fixed.

In order to fix the rubber spring 5 conveniently, the lower end of the rubber spring 5 is provided with a fixing plate 502, the upper end surface of the rotating arm 7 is provided with a fixing groove 702, the fixing plate 502 is arranged in the fixing groove 702, the upper end of the fixing plate 502 is aligned with the upper end of the rotating arm 7, the fixing plate 502 is pressed in the fixing groove 702 through a connecting ring 601 at the lower end of a rubber pad 6 to be fixed, and the connecting ring 601 is connected with the upper arm through a bolt.

The working principle is as follows:

after the rotating arm 7 is assembled, the bearing on the wheel shaft 11 is fixed in the first bearing groove 701 and the second bearing groove 901 in the axle box hole, and the transverse force of the wheel pair can be transmitted through the path of the bearing-the rotating arm 7-the framework 1, so that the risk caused by the stress on the front cover 8 and/or a rear stop fastener in the traditional structure is avoided.

The suspension device is composed of a rubber pad 6, an excircle spring 2 with unequal heights, an inner circle spring 3 and a rubber spring 5 to form a three-stage bearing structure. When the vehicle is empty, only the rubber pad 6 and the excircle spring 2 are in series bearing; during half-load, the height difference a between the top of the outer circle spring 2 and the top of the inner circle spring 3 is eliminated, the two springs are connected in parallel and then connected in series with the rubber pad 6 for bearing at the same time, the bearing rigidity is increased and matched with the load, and the gap b between the rubber spring 5 and the guide pillar 4 is reduced to b-a; after the vehicle is fully loaded, the gap between the rubber spring 5 and the guide pillar 4 is eliminated, and the rubber pad 6, the excircle spring 2, the inner circle spring 3 and the rubber spring 5 are all loaded, so that the maximum rigidity is achieved.

Because the truck is heavy, under empty to heavy truck and dynamic load, the angle between the upper plane of the rotating arm 7 and the horizontal plane changes greatly, the top surface and the bottom surface of the outer circle spring 2 and the inner circle spring 3 can also generate larger included angles to bend the springs, the fatigue life is reduced, the bending degree of the springs is reduced by arranging the rubber pads 6, and the fatigue life is prolonged.

The primary suspension positioning system realizes the conversion from the positioning of the quick truck bogie wheel set to rigid positioning by the fastener, and realizes the operation reliability; through the multi-stage rigidity suspension device, the suspension capacity required by the large load change of the empty and heavy truck of the truck is realized based on the rotating arm 7 positioning structure.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.