A gapless wheel pair radial device and bogie

Abstract

The application discloses a kind of gapless wheel pair radial devices and bogie, including radial arm, cross bar, connecting pin, upper plane bearing, lower plane bearing, elastic block and fastener;Radial arm includes top plate and bottom plate, top plate and bottom plate upper and lower orientation between forming the installation slot of cross bar, first taper hole is opened in top plate;Second taper hole is arranged on bottom plate;The axis of first taper hole and second taper hole is coaxial, and first taper hole and second taper hole are all inverted cone shape;First inner conical expansion sleeve is installed in outer conical expansion sleeve in second taper hole, and the top of outer conical expansion sleeve is higher than the top surface of bottom plate by a distance;Cross bar end is hollow cylindrical structure, and second inner conical expansion sleeve is installed in hollow cylindrical structure;Connecting pin passes through top plate, upper plane bearing, second inner conical expansion sleeve, lower plane bearing, first inner conical expansion sleeve, elastic body rear bottom in sequence and is fastened by fastener.

Description

TECHNICAL FIELD

[0001] The present application relates to railway vehicle bogies, in particular to a gapless wheel set radial device and a bogie. BACKGROUND

[0002] Self-steering radial bogie is a typical railway freight car bogie type, through the wheel set radial device, the shear stiffness of two wheel sets is improved, while the low rocking stiffness is not affected, and the problems of high speed stability of straight railway and flexible passing ability of curved railway are solved, which has a significant effect on solving the wheel-rail wear of small gauge and multiple curve lines and maintaining high speed stability.

[0003] Cross-bar type radial bogie is the most commonly used one, and the wheel set radial device mainly consists of two U-shaped radial arms connecting the bearings at both ends of the same wheel set, two cross bars connecting the radial arms diagonally, and round pins at the connecting parts. The cross-bar type radial device restricts the diamond relative motion of the two wheel sets through the diagonal connection of the two wheel sets, while the splayed relative motion of the two wheel sets is not constrained.

[0004] Based on the above working principle, it is important to ensure that the force and constraint are transmitted as completely as possible from one radial arm to another. However, due to the structural characteristics of the positioning and connecting parts of the existing wheel set radial device, there are inevitable gaps or deformations, including:

[0005] (1) Gap of cross bar and radial arm round pin connection. In order to realize the connection and rotation function, round pin connection is adopted at this position. The radial arm has a cross bar installation groove, and the top and bottom of the installation groove have cylindrical through holes; the cross bar end has a cylindrical through hole; the cross bar end is installed into the installation groove, and the ordinary round pin is successively inserted into the upper hole of the installation groove, the cross bar hole and the lower hole of the installation groove, forming a three-section pin shaft cooperation. Since the round pin adopts gap cooperation, there is a radial gap in each of the three cooperation sections, and the total radial gap is the cumulative gap of the three sections;

[0006] (2) Deformation of cross bar and radial arm ball hinge connection. Some radial devices use elastic ball hinges and fasteners for connection. Under the action of the axial force of the cross bar, the ball hinge will be elastically deformed in the radial direction, which is equivalent to the existence of a radial gap.

[0007] The harmful gap at the connection between the cross bar and the radial arm reduces the restraining effect of the radial device on the two wheel sets. When the diamond displacement of the two wheel sets occurs, the wheel set radial device cannot immediately produce restriction; with the use and wear, these gaps will continue to expand; the inhibition ability of diamond deformation continues to weaken, which reduces the maximum running speed of the vehicle.

[0008] In patent CN204605831u disclosed a railway wagon bogie and side frame and cross rod connecting device, including railway wagon bogie and side frame, cross rod connecting rod and bogie and side frame and cross rod connecting device, the bogie and side frame and cross rod connecting device is in the bogie and side frame on a connecting shaft, cross rod connecting rod through a elastic connecting device with the connecting shaft on the bogie and side frame is connected, its characterized in that: the elastic connecting device is in the bogie and side frame on the connecting shaft sleeve has a rubber metal elastic sleeve, rubber metal elastic sleeve outer sleeve has cross rod connecting rod again;At the same time in the axial direction of rubber metal elastic sleeve, located above rubber metal elastic sleeve, through the nut fastening of the connecting shaft on the bogie and side frame press a gland, by gland blocks cross rod connecting rod to go up in patent CN103010245B, a kind of railway wagon bogie is disclosed, including two parallelly arranged side frames and two connecting rods, after the intersection of two connecting rods, two ends are connected with two side frames respectively, characterized in that, the inner wall surface of the triangular hole of the lowermost side of the side frame is provided with a mounting positioning surface, and a taper column positioning hole is arranged on the mounting positioning surface;A shoulder is arranged on the mounting positioning surface and located outside the taper column positioning hole;A taper column is inserted into the taper column positioning hole;The gap between the taper column and the shoulder is filled and welded;An elastic bushing is sleeved on the end of the taper column extending out of the taper column positioning hole;

[0009] The end mounting hole of the connecting rod is sleeved on the elastic bushing;The extending end of the taper column is provided with an axial limiting device for limiting the disengagement of the connecting rod.

[0010] The above two patents completely fix two side frames, forming a fixed structure in which all components cannot move relative to each other;However, the above two patents also attempt to achieve deformation-free connection at the connection, but due to the use of rubber elastic bushing, radial deformation still occurs under radial force, which is equivalent to the existence of gap, so that the restraining effect cannot reach the ideal target. SUMMARY

[0011] In view of the technical defects of the existing cross rod type radial device, the present application provides a gapless wheel set radial device and bogie, which eliminates the initial gap of each matching part through the taper matching and pre-tightening force between the connecting pin, the radial arm and the cross rod, and realizes gapless connection;At the same time, through the taper matching and the deflection of the elastic member, the gap caused by wear is automatically compensated, the harmful gap existing in the connection part of the existing wheel set radial device is solved, which is contrary to its working principle, and the problem of reducing the play of the stabilizing effect is solved.

[0012] The gapless wheel set radial device provided by the present application comprises two radial arms and two cross rods;After the intersection of the two cross rods, the two ends are connected with the two radial arms respectively, and further comprises a connecting pin, an upper plane bearing, a lower plane bearing, an elastic block and a fastening member;

[0013] The radial arm comprises a top plate and a bottom plate, the top plate and the bottom plate form an installation slot of the crossbar between the upper and lower positions, a first taper hole is opened on the top plate; a second taper hole is arranged on the bottom plate; the axis of the first taper hole and the second taper hole are coaxial, and the first taper hole and the second taper hole are both inverted taper; an outer tapered expansion sleeve is installed in the second taper hole, a first inner tapered expansion sleeve is installed in the outer tapered expansion sleeve, and the top of the outer tapered expansion sleeve is higher than the top surface of the bottom plate by a distance;

[0014] The end of the crossbar is a hollow cylindrical structure, and a second inner tapered expansion sleeve is installed in the hollow cylindrical structure;

[0015] The connecting pin passes through the top plate, the upper plane bearing, the second inner tapered expansion sleeve, the lower plane bearing, the first inner tapered expansion sleeve, and the elastic body rear bottom in sequence and is fastened by the fastener.

[0016] The crossbar is connected to the radial arm at an angle, the end of the crossbar is installed in the installation slot of the radial arm; the plane bearings are installed on the upper and lower surfaces of the end of the crossbar respectively; the connecting pin passes through the holes of the above components, and the lower part of the connecting pin is installed with the elastic block and the fastener.

[0017] As a further technical solution, the inner hole of the outer tapered expansion sleeve is a cylindrical hole, the outer wall is a conical surface, and a cut-through the entire height is provided; the outer tapered expansion sleeve is installed in the second taper hole of the radial arm through the conical surface with the small-diameter end downward.

[0018] As a further technical solution, the inner hole of the first inner tapered expansion sleeve is a conical hole, the outer wall is a cylindrical surface, and a cut-through the entire height is provided, the first inner tapered expansion sleeve is installed in the inner cylindrical hole of the outer tapered expansion sleeve through the outer cylindrical surface, and the small-diameter end of the conical hole is downward.

[0019] As a further technical solution, the inner hole of the second inner tapered expansion sleeve is a conical hole, the outer wall is a cylindrical surface, and a cut-through the entire height is provided, the second inner tapered expansion sleeve is installed in the hollow cylindrical structure through the outer cylindrical surface, and the small-diameter end of the conical hole is downward.

[0020] As a further technical solution, the connecting pin has a connecting section and a fastening section, the connecting section is conical, and the connection between the connecting section and the fastening section is the small-diameter end.

[0021] As a further technical solution, the fastening section can be a structure with threads or a ring groove for installing the fastener.

[0022] As a further technical solution, the elastic block is an elastic structure with a hole, or a rubber piece with upper and lower lining plates, or a spring.

[0023] As a further technical solution, the fastener is a bolt or a collar.

[0024] As a further technical solution, the bottom surface of the second inner conical expansion sleeve is lower than the end of the cross rod, the top surface of the outer conical expansion sleeve is higher than the top surface of the base plate, and the lower plane bearing is installed between the bottom surface of the second inner conical expansion sleeve and the top surface of the outer conical expansion sleeve.

[0025] Secondly, the present invention also provides a bogie including the aforementioned backlash-free wheelset radial device.

[0026] Compared with the prior art, the advantages and positive effects of this invention are:

[0027] (1) After the connecting pin is assembled, the tapered expansion sleeve and two plane bearings are pressed by the axial preload of the fasteners, so that the tapered expansion sleeve expands and fits completely with the tapered section of the connecting pin and the holes of the radial arm and the end of the cross rod, eliminating the radial clearance of each mating section and forming a clearance-free fit; at the same time, the plane bearings avoid axial pressing on the upper and lower surfaces of the end of the cross rod to generate friction, without affecting the original rotation function; the problem of harmful clearance of the existing pin-shaft fit damaging the wheel set constraint capability is solved;

[0028] (2) After assembly, the elastic block is compressed under the action of pre-tightening force, generating pre-compression deflection; when the connecting pin, hole and expansion sleeve wear during use, the deflection of the elastic block is released, and the tapered expansion sleeve is pressed to expand, automatically compensating for the wear amount, thus avoiding the problem of wear leading to increased gap and weakened wheel restraint in the use of existing technologies. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the radial device for wheelsets provided in an embodiment of the present invention;

[0030] Figure 2 yes Figure 1 A cross-sectional view of AA;

[0031] Figure 3 This is a structural cross-sectional schematic diagram of the radial arm mounting groove portion provided in an embodiment of the present invention;

[0032] Figure 4 This is a cross-sectional view of the structure of the crossbar end provided in an embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram of the connecting pin provided in an embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of the structure of the first inner conical expansion sleeve provided in an embodiment of the present invention;

[0035] Figure 7 This is a schematic diagram of the structure of the external conical expansion sleeve provided in an embodiment of the present invention;

[0036] Figure 8 is a structural schematic diagram of a second inner conical expansion sleeve provided by the embodiment of the present application.

[0037] Explanation of reference signs:

[0038] 1-radial arm; 101-top plate of radial arm mounting groove; 102-bottom plate of radial arm mounting groove; 103-conical hole of top plate of radial arm mounting groove; 104-conical hole of bottom plate of radial arm mounting groove; 2-crossing rod; 21-end head of crossing rod; 3-connecting pin; 31-connecting section; 32-fastening section; 4-elastic block; 5-fastener; 6-second inner conical expansion sleeve; 61-inner conical hole; 62-outer cylindrical surface; 63-cutout; 7-first inner conical expansion sleeve; 71-inner conical hole; 72-outer cylindrical surface; 73-cutout; 8-outer conical expansion sleeve; 81-inner cylindrical hole; 82-outer conical surface; 83-elastic opening; 91-upper plane bearing; 92-lower plane bearing. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0040] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise indicated, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the art to which the present application belongs.

[0041] It should be noted that the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the present application explicitly indicates otherwise, the singular form is also intended to include the plural form, and furthermore, it should be understood that when the terms "comprise" and / or "include" are used in the present specification, they indicate the presence of a feature, step, operation, device, component and / or combination thereof;

[0042] For the convenience of description, "upper", "lower" in the present application only represent the upper and lower directions consistent with the drawings themselves, and do not limit the structure, but only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0043] A typical embodiment of the present application is as follows:Figures 1-7 The application provides a wheelset radial device without gap, which realizes the stable maintenance of linear high-speed stability and curve passing flexibility of a radial bogie, avoids the problems of influence of initial gap and deformation of an existing radial bogie on function exertion and continuous reduction of function caused by the increase of gap after wear.

[0044] As shown in Figure 1 and Figure 2 , the wheelset radial device without gap comprises radial arms 1, cross bars 2, connecting pins 3, plane bearings 9, elastic blocks 4 and fasteners 5. The two cross bars 2 are connected to the two radial arms 1 at opposite angles after being crossed. At each connecting position, two plane bearings 9 are respectively arranged on the upper and lower sides of the end of the cross bar 2, the connecting pin 3 is sequentially arranged through the top plate of the radial arm 1, the upper plane bearing 91, the cross bar 2, the lower plane bearing 92, the bottom plate of the radial arm 1 and the elastic block 4 from top to bottom, and the elastic block 4 is arranged at the lower part of the connecting pin and is compressed by the fastener 5.

[0045] As shown in Figure 3 , the structure of the connecting position of the radial arm 1 and the cross bar 2 and the connecting pin 3 is shown; the radial arm 1 comprises a top plate 101 and a bottom plate 102, the installation groove of the cross bar 2 is formed between the top plate 101 and the bottom plate 102, the taper hole 103 is arranged on the top plate 101, the taper hole 104 is arranged on the bottom plate 102, the axes of the taper hole 103 and the taper hole 104 are coaxial, the diameters of the taper hole 103 and the taper hole 104 are both large at the upper part and small at the lower part, that is, the taper hole 103 and the taper hole 104 are both inverted conical, the outer conical expansion sleeve 8 is arranged in the taper hole 104, the inner conical expansion sleeve 7 is arranged in the outer conical expansion sleeve 8, and the top of the outer conical expansion sleeve 8 is higher than the top surface of the bottom plate 102 by a distance;

[0046] As shown in Figure 7 , the inner hole 81 of the outer conical expansion sleeve 8 is a cylindrical hole, the outer wall 82 is a conical surface matched with the outer wall of the taper hole 104, that is, the outer surface of the outer conical expansion sleeve 8 is a normal cone, the outer wall 82 is provided with a cutout 83 penetrating through the whole height, so as to form an elastic structure with variable diameter, the outer conical expansion sleeve 8 is arranged in the taper hole 104 of the radial arm 1 through the conical surface 82, and the small end is downward;

[0047] As shown in Figure 6The inner hole 71 of the first inner conical expansion sleeve 7 in the embodiment is a conical hole, the outer wall 72 is a cylindrical surface, and has a cut 73 penetrating through the whole height to form an elastic structure with variable diameter; the inner conical expansion sleeve 7 is installed into the inner cylindrical hole 81 of the outer conical expansion sleeve 8 through the outer cylindrical surface 72, and when installed, the small radius end of the inner hole 71 faces downward; the bottom surface of the first inner conical expansion sleeve 7 is lower than the bottom surface of the bottom plate, and the top surface of the outer conical expansion sleeve 8 is higher than the top surface of the bottom plate 102; when axially fastened, other components will be in contact with the two expansion sleeves respectively, instead of being in contact with the fixed bottom plate and top plate first, to play the role of eliminating the expansion sleeve gap.

[0048] As shown in Figure 4 , the end 21 of the cross rod 1 is a hollow cylindrical structure, and the second inner conical expansion sleeve 6 is installed in the hole; in combination Figure 8 , the second inner conical expansion sleeve 6 is also an elastic structure with an inner conical hole 61, an outer cylindrical surface 62, and a penetrating cut 63; the second inner conical expansion sleeve 6 is installed in the direction with the small radius end of the inner conical hole 61 facing downward; the bottom surface of the second inner conical expansion sleeve 6 is lower than the bottom surface of the cross rod end 21; when axially fastened, other components are in contact with the expansion sleeve first, instead of being in contact with the fixed cross rod end first, to play the role of eliminating the expansion sleeve gap.

[0049] As shown in Figure 5 , the connecting pin 3 has a connecting section 31 and a fastening section 32, the connecting section 31 is conical, and the connection between the connecting section 31 and the fastening section 32 is a small end; the fastening section 32 can be a structure with threads or ring grooves for installing fasteners.

[0050] As shown in Figure 2 and in combination Figures 1-7 , the upper section of the connecting section 31 of the connecting pin 3 is matched with the conical hole 103 of the top plate 101 of the radial arm, the middle section of the connecting section 31 is matched with the inner conical hole 61 of the inner conical expansion sleeve 6 in the cross rod end 21, and the lower section of the connecting section 31 is matched with the inner conical hole 71 of the inner conical expansion sleeve 7 in the bottom plate 102 of the radial arm; and the upper flat bearing 91 is installed between the bottom surface of the top plate 101 and the top surface of the cross rod end 21; the lower flat bearing 92 is also installed between the bottom surface of the inner conical expansion sleeve 6 and the top surface of the outer conical expansion sleeve 8; the fastener 5 can be a bolt or a collar, which is installed on the fastening section 32 of the connecting pin 3 and presses the elastic block 4; the elastic block 4 is an elastic structure with a middle hole, which can be a rubber piece with upper and lower lining plates, or a bolt spring.

[0051] Under the axial pre-tightening force of the fastener 5, the upper section of the connecting section 31 of the connecting pin 3 is closely matched with the conical hole 103 of the top plate of the radial arm mounting groove, to generate a gapless fit between the connecting pin 3 and the top plate 101 of the radial arm 1.

[0052] The working principle of the application is as follows:

[0053] Under the axial pre-tightening force of the fastener 5, the elastic block 4 is elastically deformed and presses the lower end surface of the first inner conical expansion sleeve 7; the inner conical hole 71 of the first inner conical expansion sleeve 7 is tightly connected with the lower section of the connecting segment 31 to form a gapless fit, and continues to move upward; the first inner conical expansion sleeve 7 is expanded in the radial direction, the outer cylindrical surface 72 is tightly connected with the inner cylindrical surface 81 of the outer conical expansion sleeve 8, the outer conical expansion sleeve 8 is expanded, the outer conical surface 82 is tightly connected with the conical hole 104, and the connecting pin 3 and the radial arm bottom plate 102 form a gapless fit;

[0054] Under the axial pre-tightening force of the fastener 5, the outer conical expansion sleeve 8 continues to move upward and presses the lower planar bearing 9 below the cross rod end head 21, and then pushes the second inner conical expansion sleeve 6 upward, so that the inner conical hole 61 of the second inner conical expansion sleeve 6 is tightly connected with the middle section of the connecting segment 31 and continues to move upward; the second inner conical expansion sleeve 6 is expanded in the radial direction, the outer cylindrical surface 62 is tightly connected with the cylindrical hole of the cross rod end head 21, and the connecting pin 3 and the cross rod end head 21 form a gapless fit.

[0055] Under the axial pre-tightening force of the fastener 5, the second inner conical expansion sleeve 6 drives the cross rod end head 21 to continue to move upward, presses the upper planar bearing 9 and the radial arm mounting groove floor 101, and realizes the axial compression of the connecting pin 3; the planar bearings on the upper and lower sides of the cross rod end head 21 ensure that no additional friction resistance is generated on the upper and lower surfaces when the cross rod rotates.

[0056] Through the connecting pin 3 and the radial arm 1 and the cross rod 2, three sections of the connecting segment 31 form a gapless fit, and the relative movement of the two radial arms 1 is completely constrained.

[0057] During the above fastening process, the elastic block 4 has sufficient deflection. During the use of the vehicle, when the connecting segment 31 of the connecting pin 3 and each expansion sleeve are worn, the original tight fit is loose; at this time, the elastic block 4 releases part of the deflection, the height increases, and the above axial and radial compression processes are reappeared, the gapless fit is continued, and the function of the wheel set radial device is ensured to be realized without damage.

[0058] Further, the embodiment also provides a bogie, which comprises the above-mentioned gapless wheel set radial device and a wheel set mounted on the gapless wheel set radial device.

[0059] On the basis of the above-mentioned embodiment, the application also provides a bogie comprising the above-mentioned gapless wheel set radial device, through the arrangement of the gapless wheel set radial device, low wear and flexible passing of the bogie on a small track and a multi-curve line are realized, and at the same time, high-speed stable operation of the bogie on a straight line is realized.

Claims

1. A gapless wheel pair radial device, characterized by, The radial arm, the crossbar, the connecting pin, the upper plane bearing, the lower plane bearing, the elastic block and the fastener; The radial arm comprises a top plate and a bottom plate, and the top plate and the bottom plate form an installation slot of the crossbar in the up-down direction, a first taper hole is formed in the top plate, a second taper hole is arranged on the bottom plate, the axis of the first taper hole and the second taper hole are coaxial, the first taper hole and the second taper hole are both inverted taper, an outer taper expansion sleeve is installed in the second taper hole, the inner hole of the outer taper expansion sleeve is a cylindrical hole, the outer wall is a conical surface, and the outer taper expansion sleeve has a cut-through throughout the height and the top of the outer taper expansion sleeve is higher than the top surface of the bottom plate by a distance, and a first inner taper expansion sleeve is installed in the outer taper expansion sleeve, the inner hole of the first inner taper expansion sleeve is a conical hole, the outer wall is a cylindrical surface, and the first inner taper expansion sleeve has a cut-through throughout the height; The end of the crossbar is a hollow cylindrical structure, a second inner taper expansion sleeve is installed in the hollow cylindrical structure, the inner hole of the second inner taper expansion sleeve is a conical hole, the outer wall is a cylindrical surface, and the second inner taper expansion sleeve has a cut-through throughout the height, and the bottom surface of the second inner taper expansion sleeve is lower than the end of the crossbar; The connecting pin passes through the top plate, the upper plane bearing, the second inner taper expansion sleeve, the lower plane bearing, the first inner taper expansion sleeve, and the elastic block in sequence, and is fastened by the fastener at the bottom of the elastic block to compress the elastic block, and the lower plane bearing is installed between the bottom surface of the second inner taper expansion sleeve and the top surface of the outer taper expansion sleeve.

2. The no-gap wheel set radial device of claim 1, wherein, The outer taper expansion sleeve is installed in the second taper hole of the radial arm through the conical surface and the small-diameter end downward.

3. The gapless wheel pair radial device of claim 1, wherein, The first inner taper expansion sleeve is installed in the inner cylindrical hole of the outer taper expansion sleeve through the outer cylindrical surface, and the small-diameter end of the conical hole is downward.

4. The gapless wheel pair radial device of claim 1, wherein, The second inner taper expansion sleeve is installed in the hollow cylindrical structure through the outer cylindrical surface, and the small-diameter end of the conical hole is downward.

5. The gapless wheel pair radial device of claim 1, wherein, The connecting pin has a connecting section and a fastening section, the connecting section is conical, and the connecting section and the fastening section are connected at the small-diameter end.

6. The gapless wheel pair radial device of claim 5, wherein, The fastening section can be a structure with threads or a ring groove for installing the fastener.

7. The gapless wheel pair radial device of claim 1, wherein, The elastic block is an elastic structure with a hole, a rubber piece with upper and lower lining plates, or a spring.

8. The gapless wheel pair radial device of claim 1, wherein, The fastener is a bolt or a ring.

9. The gapless wheel pair radial device of claim 1, wherein, The top surface of the outer taper expansion sleeve is higher than the top surface of the bottom plate. 10.A bogie comprising the gapless wheel pair radial device according to any one of claims 1-9.

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