WO2023087752A1

WO2023087752A1 - Wheel-axle-brake-type railway wagon bogie

Info

Publication number: WO2023087752A1
Application number: PCT/CN2022/105663
Authority: WO
Inventors: 李华宴; 涂智文; 严志雄; 徐勇; 易军恩; 周乐; 江荷燕; 肖光毅; 宋帆; 管希; 黎巧能; 吴先年; 唐大璇
Original assignee: 中车长江运输设备集团有限公司
Priority date: 2021-11-18
Filing date: 2022-07-14
Publication date: 2023-05-25
Also published as: CN114104027B; CN114104027A

Abstract

A wheel-axle-brake-type railway wagon bogie, comprising two wheelset assemblies (1), two side frame assemblies (2), a bolster assembly (3) and a foundation brake assembly (4). Each wheelset assembly (1) comprises an axle (1.2), a pair of wheels (1.1) and a pair of brake wheels (1.3), wherein the pair of wheels (1.1) are symmetrically mounted on the axle (1.2) by means of wheel seats; the pair of brake wheels (1.3) are symmetrically mounted on the axle (1.2) by means of brake wheel mounting seats; and the pair of brake wheels (1.3) are located between the pair of wheels (1.1).

Description

Axle Brake Type Railway Freight Car Bogies

technical field

The invention relates to the technical field of railway freight car bogies, in particular to a wheel axle braking type railway freight car bogie.

Background technique

Disc brake and tread brake technology are the most commonly used braking methods for railway vehicles. With the development of railway freight car technology at home and abroad, most fast and high-speed freight cars adopt disc brake technology, and the bogie is a welded frame type; heavy-duty railway freight cars generally use Wheel tile tread braking technology, the bogie adopts three-piece bogie. The cast steel three-piece bogie is mainly composed of a bolster and two side frames. It has the characteristics of high design strength, simple and compact structure, fewer parts, easy maintenance, low cost, and good load balance. The three-piece bogie is equipped with a lever brake based on the brake device. When braking, the bogie with this structure applies pressure to the wheel through the brake shoe, and brakes through the friction between the wheel and the brake shoe. The frictional heat load increases. The wear of the wheel is commonly caused by thermal peeling of the wheel tread, uneven wear of the brake shoes and other inertial faults. Especially in the case of heavy loads, the inertia of the train running is large, the process of stopping or decelerating within a specified distance, and the train running is a process of frequent speed regulation and frequent braking, which greatly accelerates the wear process of the wheels.

The disc brake is to add a brake disc to the axle, install a brake caliper device on the bogie frame or bolster, and press the side of the brake disc through the brake pads installed on the brake caliper device to generate frictional braking force , to achieve braking deceleration or parking. Since the friction pair does not directly act on the wheel tread, it can greatly reduce the thermal load and mechanical wear on the wheel surface and prolong the life of the wheel; the design and material selection of the brake disc are independent, and the brake disc can be forced to dissipate heat during operation, and the heat capacity of the brake friction is improved. ;The brake disc and the brake pad are in plane contact, the friction factor is more stable, and the shaft braking power is high. At present, the disc brake technology is mainly used for express trucks. Express trucks are characterized by high running speed, less marshalling, and most of the axle loads are in the range of 18t to 22t. The bogie mainly adopts a welded frame type. The design, manufacture, and Operation and maintenance costs are high and difficult. The bogie of the welded frame scheme using disc brake technology is not suitable for loading railway wagons with large axle loads.

In the railway heavy-duty transportation technology, the main features are heavy vehicle axle, low self-weight, high load, large number of trains, low running speed, simple and reliable bogie structure, and low manufacturing, operation and maintenance costs. However, the lack of maintenance equipment, high maintenance labor costs, or the use of single wear wheels in management regulations, or the difficulty of changing the brake shoe structure, etc., put forward higher requirements for the wear of heavy-duty truck wheels.

The traditional welded frame bogie disc brake scheme is costly and difficult to design, manufacture, use and maintain, and the welded frame bogie is not suitable for heavy-duty transportation. There are three large heavy-duty railway freight car bogies, which are mainly equipped with lever brakes based on brake devices. When braking, the bogie with this structure applies pressure to the wheels through the brake shoes, and brakes through the friction between the wheels and the brake shoes. The friction heat load aggravates the wear of the wheel, and common inertial faults such as thermal peeling of the wheel tread and uneven wear of the brake shoes. Especially in the case of heavy loads, the inertia of the train running is large, the process of stopping or decelerating within a specified distance, and the train running is a process of frequent speed regulation and frequent braking, which greatly accelerates the wear process of the wheels. Although the three-piece bogie of the traditional disc brake can also improve the wear of the wheel, it has a complex design structure, high manufacturing and assembly precision requirements, and the additional brake caliper clamp unit and brake disc require high manufacturing and maintenance costs. , also increases the weight of the bogie, and the economic benefit is obviously reduced.

The three-piece bogie with traditional disc brakes mainly uses the brake caliper clamp unit and the brake disc on the wheel set, and uses the brake caliper clamp to tighten the side of the brake disc to generate frictional braking. The brake caliper clamping unit mainly adopts a similar design that is maturely used in passenger cars, which has a complex structure, high cost, inconvenient manufacturing and maintenance, and obviously increases the weight of the bogie. The clamping unit of this type of bogie is mainly installed on the bolster. Since the total weight of the railway freight car changes greatly when it is empty or heavy, the height of the bogie spring suspension system changes greatly when it is empty or heavy, and the cradle of the three-piece bogie The pillow has a certain lateral offset relative to the side frame, which is not conducive to the uniform friction between the brake caliper clip and the brake disc. The deflection of the bolster affects the stability of the vehicle when it is empty.

Contents of the invention

The object of the present invention is to address the shortcomings of the above-mentioned technologies, and to provide a wheel axle braking type railway freight car bogie that reduces wheel wear and reduces manufacturing, operation and maintenance costs.

In order to achieve the above object, the wheel axle brake type railway freight car bogie designed by the present invention comprises two wheel sets, two side frames, a bolster and a foundation brake; each wheel set includes an axle , a pair of wheels and a pair of brake wheels, a pair of wheels are symmetrically installed on the axle through the wheel seat, a pair of brake wheels are symmetrically installed on the axle through the brake wheel mounting seat, and a pair of brake wheels are located between a pair of wheels.

Further, the brake wheel includes a rim, a web and a hub, the web is an inclined web, and the inclined web is inclined toward the wheel side, so that the rim and the hub are in an axially offset structure close to the wheel side.

Further, the web includes an upper web and a lower web, the upper web is connected to the rim, the lower web is connected to the hub, and the lower part of the inner side of the upper web is aligned with the upper side of the outer side of the lower web and fixedly linked.

Further, cooling ribs are evenly distributed at the transition part between the inner side of the rim and the web.

Further, the foundation brake composition includes two groups of foundation brake units, a unit cylinder assembly and a hand brake lever; each group of foundation brake units includes brake beams, chain shoe rings, brake levers and Brake shoes on the beam, one end of the chain shoe ring is connected with the fulcrum seat on the bolster composition through a round pin, the other end of the chain shoe ring is connected with the upper end of the brake lever through a round pin, and the lower end of the brake lever is connected with the brake beam; The unit cylinder assembly includes a brake cylinder and a brake adjuster. The lower end of the brake lever of one group of basic brake units in the two groups of basic brake units is connected to the brake cylinder through a round pin, and the end of the push rod of the brake cylinder is connected to the other end of the brake cylinder. Brake lever connection for group foundation brake unit.

Further, the brake beam includes a brake beam frame composed of struts, brake beam ends installed at both ends of the struts, and a bow-shaped rod, and a brake shoe holder installed on each brake beam end, One end of the bow-shaped rod is installed on one end of the brake beam, the other end of the bow-shaped rod is installed on the end of the other brake beam, and a pillar is supported between the middle part of the strut and the bending part of the bow-shaped rod; The shoe is installed in the arc-shaped groove of the brake shoe holder on both sides of the brake beam, and is limited and prevented from coming off by the brake shoe pin.

Further, the end slider at the end of the brake beam is provided with an arc-shaped groove, the depth direction of the arc-shaped groove is consistent with the thickness direction of the end slider, and the arc-shaped opening of the arc-shaped groove is outward and connected with the outside Connected, the ring roller is pushed into the arc groove from the arc opening of the arc groove and the positioning pin passes through the middle hole of the ring roller until it is installed on the end slider, the positioning pin is arranged coaxially with the arc groove, The annular roller rotates in the arc groove around the positioning pin; the axial gap between the annular roller and the chute wear plate installed in the chute of the side frame is 2 ~ 8mm, and the distance between the annular roller and the chute wear plate The gap is smaller than the gap between the brake shoe and the wheel.

Further, the end slider at the end of the brake beam is installed on the chute wear plate in the chute of the side frame, and the end slider is covered with a slider wear sleeve.

Further, the wheel seat at both ends of the axle and the brake wheel mounting seat are smoothly transitioned through multiple arcs; the axle diameter at the position where the brake wheel seat is installed is smaller than the axle diameter at the position where the wheel seat is installed To be slightly larger.

Further, the support rod is a hollow steel pipe, and the two ends are machined to fit in an interference fit with the end of the brake beam; the bow rod is a steel rod bending part, and the two ends are welded to the end of the brake beam; the brake shoe support The notch snaps onto the flat face of the end of the bow.

Compared with the prior art, the present invention has the following advantages: the wheel axle brake type railway freight car bogie of the present invention is equipped with auxiliary brake wheels, which eliminates the grinding and wear of the brake shoes on the wheels when the traditional railway vehicles are braked, and the wheel The impact of continuous temperature rise and fall on the material properties of the wheel when rubbing against the brake shoe can greatly reduce the wear on the wheel during vehicle operation. The structure is simple and the weight is light, which can reduce the cost of manufacturing and operation and maintenance.

Description of drawings

Fig. 1 is the structure schematic diagram of axle braking type railway freight car bogie of the present invention;

Fig. 2 is a schematic diagram of the composition structure of the wheel set in Fig. 1;

Fig. 3 is a structural schematic diagram of the integral brake wheel in Fig. 2;

Fig. 4 is a schematic side view of Fig. 3;

Fig. 5 is a structural schematic diagram of the split brake wheel in Fig. 2;

Figure 6 is a schematic side view of Figure 5;

Fig. 7 is a schematic diagram of the composition and structure of the foundation brake in Fig. 1;

Fig. 8 is a schematic structural diagram of the brake beam in Fig. 7;

FIG. 9 is a schematic diagram of the structure of the end of the brake beam in FIG. 8 .

Among them: wheel set composition 1, wheel 1.1, axle 1.2, brake wheel 1.3, rim 1.3a, web 1.3b, hub 1.3c, cooling rib 1.3d, upper web 1.3e, lower web 1.3f;

Side frame composition 2, chute wear plate 2.1;

Bolster composition 3, fulcrum seat 3.1;

Basic brake components 4, chain shoe ring 4.1, brake lever 4.2, brake beam 4.4, unit cylinder assembly 4.3, hand brake lever 4.5, brake shoe 4.6, strut 4.4a, brake beam end 4.4b, bow Rod 4.4c, brake shoe support 4.4d, pillar 4.4e, end slider 4.4f, arc groove 4.4g, ring roller 4.4h, positioning pin 4.4j, slider wear sleeve 4.4k.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1, the wheel axle braking type railway freight car bogie is suitable for three-piece bogies composed of two side frames and bolsters, and also suitable for integral frame bogies.

The wheel axle braking type railway freight car bogie comprises two wheel sets forming 1, two side frames forming 2, bolster forming 3 and foundation braking forming 4. As shown in Figure 2, each wheel set 1 includes an axle 1.2, a pair of wheels 1.1 and a pair of brake wheels 1.3, and a pair of wheels 1.1 are symmetrically installed on the axle 1.2 through the interference tight fit of the wheel seat. The brake wheel 1.3 is symmetrically installed on the axle 1.2 through the interference tight fit of the brake wheel mounting seat, and a pair of brake wheels 1.3 is located between a pair of wheels 1.1. Simultaneously, the wheel seat at both ends of the axle 1.2 and the brake wheel mounting seat are smoothly transitioned through multi-section arcs, and the axle diameter at the position where the brake wheel seat is installed is slightly larger than the axle diameter at the position where the wheel seat is installed. To facilitate the installation of the wheels.

As shown in Figure 3 and Figure 4, the brake wheel 1.3 is an integral structure, including a rim 1.3a, a web 1.3b and a hub 1.3c, the web 1.3b is an inclined web, and the inclined web faces the wheel 1.1 The side is inclined so that the rim 1.3a and the hub 1.3c are axially offset from the wheel 1.1 side; the inner side of the rim 1.3a and the transition part of the web 1.3b are evenly distributed with cooling ribs 1.3d to enhance the structural strength of the rim.

As shown in Figure 5 and Figure 6, the brake wheel can also be a split combined structure, the web includes an upper web 1.3e and a lower web 1.3f, the upper web 1.3e is connected with the rim 1.3a, and the lower web 1.3f Connected with the wheel hub 1.3c, the lower part of the inner surface of the upper web 1.3e is aligned with the upper part of the outer surface of the lower web 1.3f and connected by bolts, so that the rim and the wheel hub are axially offset from the wheel side; the rim wears to After the limit, only the rim with the upper web needs to be replaced, and there is no need to remove the hub, reducing maintenance costs.

The integral brake wheel is easy to process and install; the combined brake wheel has high processing and assembly precision, but it is easy to maintain and replace, and the maintenance cost is low. For vehicles running on narrow-gauge and quasi-gauge lines, the rim and hub of the brake wheel composed of the wheel set are designed with an axially outward offset structure, and the rim and hub of the brake wheel with wide gauge can be axially symmetrical, which can make full use of The inner space of the wheel set increases the width of the brake wheel and the inner distance between the two brake wheels to increase the friction area and maintain the safety clearance between the axial direction and the body parts.

As shown in Figure 7, the foundation brake assembly 4 includes two groups of foundation brake units, a unit cylinder assembly 4.3 and a hand brake lever 4.5. Among them, each group of basic brake units includes a brake beam 4.4, a chain shoe ring 4.1, a brake lever 4.2 and a brake shoe 4.6 installed on the brake beam 4.4, and one end of the chain shoe ring 4.1 is composed of a round pin and a bolster. The fulcrum seat 3.1 is connected, the other end of the chain shoe ring 4.1 is connected with the upper end of the brake lever 4.2 by a round pin, and the lower end of the brake lever 4.2 is connected with the brake beam 4.4. As shown in Figure 8, the brake beam 4.4 includes a brake beam frame composed of a strut 4.4a, a brake beam end 4.4b installed at both ends of the strut 4.4a and a bow rod 4.4c, and is installed on each The brake shoe holder 4.4d on the end 4.4b of the moving beam, one end of the arched rod 4.4c is installed on one of the ends 4.4b of the brake beam, and the other end of the arched rod 4.4c is installed on the other end 4.4 of the brake beam On b, a pillar 4.4e is supported between the middle part of the strut 4.4a and the bending part of the arched rod 4.4c; the brake shoe 4.6 is installed in the arc groove of the brake shoe holder 4.4d on both sides of the brake beam 4.4, Through the brake shoe pin 4.7 limit and anti-off.

The unit cylinder assembly 4.3 includes a brake cylinder and a brake regulator. The lower end of the brake lever 4.2 of one group of basic brake units in the two groups of basic brake units is connected with the brake cylinder through a round pin, and the end of the push rod of the brake cylinder is connected with the brake cylinder. The brake lever 4.2 of another group of basic brake unit is connected. Only one set of unit brake cylinder assembly is needed, and through an external air source, the braking force output by the brake cylinder is amplified by the brake lever and transmitted to the two brake beams, and then evenly transmitted to the brake shoes installed on the brake beam , the radial pressure on the rim of the brake wheel, during the rolling operation of the wheel set, realizes the resistance moment of the wheel set caused by the brake wheel, and achieves the braking deceleration or parking function. The brake regulator adjusts the stroke of the brake cylinder according to the wear of the brake shoe and the brake wheel to maintain the normal braking effect. The hand brake lever 4.5 can satisfy the parking brake effect.

Combined with the cross section of the end slider 4.4f of the brake beam end 4.4b shown in Figure 9, it is rectangular, and the end slider 4.4f is provided with an arc-shaped groove 4.4g, and the depth direction of the arc-shaped groove 4.4g is consistent with the end The thickness direction of the upper slider 4.4f is consistent, the arc opening of the arc groove 4.4g is outward and communicated with the outside, and the annular roller 4.4h is pushed into the arc groove 4.4g from the arc opening of the arc groove 4.4g And the positioning pin 4.4j passes through the middle hole of the annular roller 4.4h until it is installed on the end slider 4.4f, the positioning pin 4.4j is coaxially arranged with the arc groove 4.4g, and the annular roller 4.4g surrounds the positioning pin 4.4 j rotates in the arc groove 4.4g; at the same time, the axial gap between the annular roller 4.4h and the chute wear plate 2.1 installed in the side frame composition 2 chute is 2-8mm. The end slider 4.4f of the brake beam end 4.4b is installed on the chute wear plate 2.1 in the side frame composition 2 chute, when the two brake beams are not parallel or the brake beam is axially biased to one side , the annular roller 4.4h is in contact with the wear plate 2.1 of the chute, and the annular roller 4.4g rotates around the positioning pin 4.4j in the end slider 4.4h. Therefore, when the brake is released, even if the annular roller 4.4h is in contact with the chute The wear plate 2.1 contact will not cause jamming, which can realize the limit and function of the brake beam, improve the braking efficiency, reduce the braking and alleviate the failure. In this embodiment, the end slider 4.4h is covered with a slider wear sleeve 4.4k, and the positioning pin 4.4j also has the positioning function of the slider wear sleeve 4.4k.

The strut 4.4a is a hollow steel pipe, and the two ends are machined for interference fit with the end 4.4b of the brake beam, which can improve the reliability of the strut interference press-fitting. The arched rod 4.4c is a steel bar bending part, and the two ends are connected with the side weld of the brake beam end 4.4b. After the bow rod and the end of the brake beam are assembled, the notch of the brake shoe holder 4.4d clamps the flat surface of the end of the bow rod 4.4c, and then drilled pin holes are used to connect the brake shoe holder and the end of the brake beam with two bolts or rivets. The head connection can make the connection section of the bow rod and the end of the brake beam bear the overall force during use, avoid only the weld seam from being loaded, and increase the reliability of the connection between the bow rod and the end of the brake beam. The assembly equipment of the brake beam is simplified, the production efficiency is improved and the production cost is reduced.

The invention installs auxiliary brake wheels on the inner sides of the two wheels, which eliminates the grinding and wear of the brake shoes on the wheels when the traditional railway vehicle brakes, and the influence of the constant temperature rise and fall on the material properties of the wheels when the wheels and brake shoes are rubbed against each other . In addition, the radially outer surface of the brake wheel and the brake shoe in the foundation brake device produce frictional braking under the action of the braking force, and the heat generated by the friction between the surface of the brake wheel and the brake shoe is passively passed through the cooling ribs of the brake wheel. Heat dissipation, so that the temperature of the friction pair will not be too high, so as to achieve stable performance of the friction material and prolong the service life of the friction material.

Compared with the traditional lever brake, the shaft wheel brake has low wheel wear, and compared with the disc brake, the structure configuration is simple, the weight is light, the manufacturing and maintenance costs are obviously low, and the economic benefit is good.

The cross-section of the slider at the end of the brake beam adopts a rectangular structure, which can reduce the eccentric wear of the brake shoe. The ring roller is arranged in the slider at the end to convert the plane contact friction between the end of the brake beam and the wear plate of the chute into a system. The rolling of the moving beam rollers in the chute reduces the jamming failure of the brake beam end in the chute when the brake beam is not parallel to the axle. At the same time, compared with the traditional brake beam, it can reduce the contact between the ring roller and the The axial clearance of the wear plate of the side frame chute is used to realize the limit function of the displacement of the brake beam in the axial direction of the wheel set, and to improve the transitional wear of the wheel rim in the traditional wheel pad braking method.

Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention without limitation, although the present invention has been described in detail with reference to examples, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements without departing from the spirit and scope of the technical solution of the present invention shall be covered by the claims of the present invention.

Claims

A wheel axle brake type railway freight car bogie, comprising two wheel sets (1), two side frames (2), bolsters (3) and foundation brakes (4); it is characterized in that: each The wheel set (1) includes an axle (1.2), a pair of wheels (1.1) and a pair of brake wheels (1.3), and a pair of wheels (1.1) are symmetrically installed on the axle (1.2) through the wheel seat. A pair of brake wheels (1.3) are symmetrically installed on the axle (1.2) through the brake wheel mounting seat, and the pair of brake wheels (1.3) are located between the pair of wheels (1.1).
According to the axle braking type railway freight car bogie according to claim 1, it is characterized in that: the brake wheel comprises a rim (1.3a), a web (1.3b) and a hub (1.3c), and the web (1.3b) It is an inclined web, and the inclined web is inclined toward the wheel (1.1) side, so that the rim (1.3a) and the wheel hub (1.3c) are axially offset toward the wheel (1.1) side.
According to the axle braking type railway freight car bogie according to claim 2, it is characterized in that: the web comprises an upper web (1.3e) and a lower web (1.3f), and the upper web (1.3e) and the wheel rim (1.3 a) Connection, the lower web (1.3f) is connected with the hub (1.3c), and the lower part of the inner side of the upper web (1.3e) is aligned with the upper side of the outer side of the lower web (1.3f) and fixedly linked.
According to claim 2 or 3, the axle braking type railway freight car bogie is characterized in that cooling ribs (1.3d) are evenly distributed at the transition part between the inner side of the rim (1.3a) and the web (1.3b).
According to the axle braking type railway freight car bogie according to claim 1, it is characterized in that: said foundation braking composition (4) includes two groups of foundation braking units, a unit cylinder assembly (4.3) and a hand brake lever (4.5 ); each group of basic brake units includes brake beam (4.4), chain shoe ring (4.1), brake lever (4.2) and brake shoe (4.6) installed on the brake beam (4.4), chain shoe ring ( 4.1) One end is connected with the fulcrum seat (3.1) on the bolster composition (3) through a round pin, the other end of the chain shoe ring (4.1) is connected with the upper end of the brake lever (4.2) through a round pin, and the lower end of the brake lever (4.2) It is connected with the brake beam (4.4); the unit cylinder assembly (4.3) includes a brake cylinder and a brake regulator, and the lower end of the brake lever (4.2) of a group of basic brake units in the two groups of basic brake units passes through the circle The pin is connected with the brake cylinder, and the end of the push rod of the brake cylinder is connected with the brake lever (4.2) of another group of basic brake units.
According to claim 5, the wheel axle brake type railway freight car bogie is characterized in that: the brake beam (4.4) comprises a stay (4.4a), and brake beam ends installed at both ends of the stay (4.4a). head (4.4b) and bow rod (4.4c), and the brake shoe support (4.4d) installed on each brake beam end (4.4b), the bow rod (4.4c) One end is installed on one end of the brake beam (4.4b), the other end of the bow rod (4.4c) is installed on the other end of the brake beam (4.4b), and the middle part of the strut (4.4a) is connected to the A pillar (4.4e) is supported between the bending parts of the bow-shaped rod (4.4c); the brake shoe (4.6) is installed in the arc groove of the brake shoe holder (4.4d) on both sides of the brake beam (4.4), through The brake shoe pin (4.7) is limited and anti-off.
According to claim 6, the wheel axle braking type railway freight car bogie is characterized in that: the end slider (4.4f) of the brake beam end (4.4b) is provided with an arc-shaped groove (4.4g), The depth direction of the arc groove (4.4g) is consistent with the thickness direction of the end slider (4.4f), the arc opening of the arc groove (4.4g) is outward and communicates with the outside, and the ring roller (4.4h) The arc-shaped opening of the arc-shaped groove (4.4g) is pushed into the arc-shaped groove (4.4g) and the positioning pin (4.4j) passes through the middle hole of the ring roller (4.4h) until it is installed on the end slider (4.4 On f), the positioning pin (4.4j) is coaxially arranged with the arc groove (4.4g), and the ring roller (4.4g) rotates around the positioning pin (4.4j) in the arc groove (4.4g); the ring roller The axial gap between the sub (4.4h) and the chute wear plate (2.1) installed in the chute of the side frame composition (2) is 2~8mm, between the annular roller (4.4h) and the chute wear plate (2.1) The gap is smaller than the gap between the brake shoe (4.6) and the wheel (1.1).
According to claim 7, the wheel axle braking type railway freight car bogie is characterized in that: the end slider (4.4f) of the brake beam end (4.4b) is installed in the chute of the side frame composition (2) On the chute wear plate (2.1), the end slider (4.4h) is covered with a slide wear sleeve (4.4k).
According to the axle braking type railway freight car bogie according to claim 1, it is characterized in that: the wheel seat and the brake wheel mounting seat at both ends of the axle (1.2) are smoothly transitioned through multiple arcs; The diameter of the axle shaft at the position of the moving wheel mounting seat is slightly larger than the diameter of the axle shaft at the position where the wheel seat is installed.
According to claim 6, the wheel axle braking type railway freight car bogie is characterized in that: the strut (4.4a) is a hollow steel pipe, and both ends are machined for interference fit with the end of the brake beam (4.4b); The rod (4.4c) is a steel rod bending part, and the two ends are connected with the side weld of the end of the brake beam (4.4b); .