A press-fit positioning mechanism for a rail vehicle traction rod node

Abstract

The present invention relates to the technical field of component assembly for rail vehicles, and specifically provides a press-fit positioning mechanism for a rail vehicle traction rod node, comprising a base and two slide assemblies located on the base, the slide assembly comprising a sliding assembly and a support seat that can be driven by the sliding assembly to slide horizontally, the upper edge of the support seat being vertically provided with an angle adjustment assembly, a flexible guide assembly, and a positioning assembly in sequence from bottom to top, the positioning assembly also comprising an upper platform; the positioning assembly comprising a positioning sleeve and a clamping member, the positioning sleeve comprising a positioning column located in the middle and provided with an adjustment through hole on the positioning column, the clamping member being located in the adjustment through hole; the upper end of the positioning column being passed through a machined through groove to the upper side of the upper platform and extending into the inner hole of the rod body in the traction rod node, the flat square of the core shaft in the traction rod node extending into the adjustment through hole and being clamped and positioned by the clamping member. The present invention can achieve angle adjustment and center distance adjustment according to the specifications of the traction rod node, can eliminate the gap between the tooling and the core shaft, and improve the press-fit positioning accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of rail vehicle component assembly, in particular to a press-fit positioning mechanism for a rail vehicle drawbar node. Background Art

[0002] The bogies of rail vehicles are usually provided with a traction rod node, which mainly plays the role of connection and vibration reduction. The traction rod node usually includes a rod body and two rubber nodes. The rubber node includes an inner sleeve, an outer sleeve and a rubber body vulcanized between the inner sleeve and the outer sleeve. The inner sleeve also includes a core shaft, and the core shaft includes a flat square extending to the outside of the inner sleeve. During the processing, the two rubber nodes are respectively pressed into the two inner holes at both ends of the rod body. In the prior art, rubber nodes are usually pressed into the inner holes of the rod body by manual tools. As the operating speed of vehicles in the rail transit field continues to increase, the requirements for the design and manufacturing process of traction rod nodes are becoming increasingly stringent. The manual processing method cannot meet the high-precision requirements for pressing the rubber nodes in the traction rod nodes. The manual processing method has low processing efficiency and poor pressing quality, which will lead to reduced mechanical performance of the entire vehicle during operation. Therefore, it is necessary to design a special pressing device to install the traction rod node. In the prior art, the following patents involve pressing devices for traction rod nodes or similar connecting rods:

[0003] 1. Patent number "201520465255.5," entitled "Rubber Ball Joint Interference Fitting Tool," is a utility model patent. The patent comprises a press-in assembly, a support cylinder assembly, and a return assembly. The press-in assembly consists of a press head and a guide cylinder. The support cylinder assembly includes an upper support cylinder, a lower support cylinder, and a bottom support cylinder aligned in sequence. The return assembly includes a gland. This utility model simplifies the interference fit process for rubber ball joints, reduces labor intensity, and improves efficiency.

[0004] 2. Patent number "201710756026.2," entitled "Press-fitting tooling and method for axle box tie rod," includes a base, a support cylinder assembly, a guide cylinder assembly, and a press head. The guide cylinder assembly, the press-fitting hole of the rod body, and the support cylinder assembly are coaxially aligned from top to bottom. A vertically arranged tie rod ball joint passes through the guide cylinder assembly, with the lower end extending into the press-fitting hole of the rod body and the upper end covered by a press block. The press-fitting tooling in this invention patent has high press-fitting precision and can effectively reduce the center distance tolerance of the axle box tie rod.

[0005] However, the above prior art still has the following problems:

[0006] 1. Different specifications of positioning cylinders need to be designed for different types of drawbars. Due to the wide variety of products, the number of toolings is huge and the manufacturing cost of tooling increases;

[0007] 2. The existing positioning cylinder structure is difficult to eliminate the gap caused by the tolerance of the iron parts and the positioning cylinder processing accuracy, and there is a risk of product angles being out of tolerance;

[0008] 3. After the product is changed, the tooling needs to be readjusted, which will reduce production efficiency;

[0009] 4. The positioning cylinder is reset by a single spring, which can easily cause the positioning cylinder to tilt, resulting in metal accumulation during the press-fitting process.

[0010] In summary, how to design a press-fit positioning mechanism for a rail vehicle traction rod node that has a simple structure, high press-fit positioning accuracy, and can achieve precise angle adjustment is a problem that urgently needs to be solved. Summary of the Invention

[0011] In order to solve the above problems, the present invention provides a press-fitting positioning mechanism for a rail vehicle traction rod node, which can be applied to traction rod nodes of different specifications, has strong universality, and can improve the press-fitting efficiency and precision of the traction rod node.

[0012] To achieve the above-mentioned purpose, the present invention proposes the following technical solutions: a press-fit positioning mechanism for a rail vehicle traction rod node, comprising a base and two slide assemblies symmetrically arranged on the base, the slide assembly comprising a sliding assembly and a support seat that can be driven by the sliding assembly to slide horizontally, an angle adjustment assembly, a flexible guide assembly and a positioning assembly are vertically arranged from bottom to top on the upper edge of the support seat, the positioning assembly also includes an upper platform with a machined through groove; the positioning assembly comprises a positioning sleeve and a clamping piece, the positioning sleeve comprises a positioning column located in the middle and an adjustment through hole is provided on the positioning column; the upper end of the positioning column passes through the machined through groove to above the upper platform and extends into the inner hole of the rod body in the traction rod node, the flat square of the core shaft in the traction rod node extends into the adjustment through hole and is clamped and positioned in the adjustment through hole by the clamping piece.

[0013] Furthermore, the clamping member includes a clamping block located in the adjustment hole and a clamping drive member located outside the positioning column. The power output end of the clamping drive member is connected to the clamping block and drives the clamping block to clamp the flat square in the adjustment hole.

[0014] Furthermore, the adjustment hole is a rectangular hole structure, and the clamping block is arranged close to the hole wall of one side of the adjustment hole; a driving hole is provided at the lower part of the positioning column and the power output end of the clamping drive extends from the driving hole and is connected to the clamping block.

[0015] Furthermore, the flexible guide assembly includes a guide plate located at the upper end of the angle adjustment assembly and multiple guide columns placed on the guide plate; the positioning sleeve includes a positioning plate arranged along the circumference of the positioning column, and the upper ends of the multiple guide columns are connected to the lower end of the positioning plate; a compression spring is provided on the guide column.

[0016] Furthermore, the lower portion of the positioning post extends below the positioning plate and is accommodated between the plurality of guide posts; the drive hole is opened on the positioning post below the positioning plate and the clamping drive member is located between adjacent guide posts.

[0017] Furthermore, the angle adjustment assembly includes an angle plate located on the support seat and an angle driving member connected to the angle plate; the angle plate and the guide plate are connected via a connecting plate, and the angle plate and the support seat are connected via a connecting platform.

[0018] Furthermore, the sliding assembly includes a slide rail located on the base and a slider matched with the slide rail, and the support seat is connected to the upper end of the slider; the sliding assembly also includes a sliding drive unit and drives the support seat to slide horizontally on the slide rail through the sliding drive unit.

[0019] Furthermore, the sliding drive unit includes two drive seats fixed on the base and located between the slide rails, a screw is connected between the two drive seats, and a screw seat connected to the support seat is provided in the middle of the screw; the screw is connected to a sliding drive member located on the outside of the base and the screw is driven by the sliding drive member to drive the screw seat and the support seat to slide horizontally.

[0020] Furthermore, a connecting seat is provided at the upper end of the base; the slide rail and the lead screw seat are both connected to the connecting seat.

[0021] Furthermore, one side outer end surface of the upper platform is connected to the corresponding side outer end surface of the base through a side seat; the processed through groove, slide rail and lead screw are all arranged parallel to the side seat.

[0022] The beneficial effects of the present invention are:

[0023] 1. The press-fitting positioning mechanism in the present invention can be adapted to the processing requirements of traction rod nodes of different lengths through two slide assemblies, can be adapted to the processing requirements of traction rod nodes with different sizes of flat squares through the positioning assembly, and can improve the angle progress through the angle adjustment assembly; it can reduce the frequency of tooling changeover, eliminate the gap between the workpiece and the tooling, improve versatility and universality, reduce the manufacturing cost of the tooling, and improve processing efficiency.

[0024] 2. The flexible guide assembly of the present invention includes multiple guide posts and multiple compression springs, which can improve the guide positioning accuracy and eliminate the tilting phenomenon of the positioning sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the overall structure of the press-fit positioning mechanism provided by an embodiment of the present invention (only one traction rod node is shown).

[0026] Figure 2 It is a structural schematic diagram of the press-fit positioning mechanism provided by an embodiment of the present invention (the upper platform and side seats are not shown, only one traction rod node is shown).

[0027] Figure 3 It is a structural schematic diagram of the press-fit positioning mechanism provided by an embodiment of the present invention (the upper platform and side seats are not shown, only one traction rod node is shown).

[0028] Figure 4 It is a schematic cross-sectional structural diagram of a positioning assembly provided by an embodiment of the present invention.

[0029] Figure markings: slide assembly 1, angle adjustment assembly 2, flexible guide assembly 3, positioning assembly 4, support seat 5, upper platform 6, processing groove 7, positioning sleeve 8, clamping part 9, clamping drive part 10, adjustment through hole 11, positioning plate 12, guide plate 13, guide column 14, compression spring 15, drive hole 16, angle plate 17, angle drive part 18, connecting plate 19, connecting platform 20, slide rail 21, slider 22, drive seat 23, screw 24, screw seat 25, side seat 26, rod body 27, rubber node 28, flat square 29, inner hole 30, connecting seat 31, base 32, positioning column 33, sliding drive part 34, clamping block 35. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the present invention more clear, the following Figure 1-4 It should be understood that the specific embodiments described herein are only used to illustrate the present invention and do not constitute a limitation of the present invention.

[0031] A press-fit positioning mechanism for a rail vehicle traction rod node, such as Figure 1-3 As shown, the traction rod node includes a rod body 27 and a rubber node 28. The two ends of the rod body 27 include two inner holes 30. The rubber node 28 needs to be pressed into the inner hole 30. The rubber node 28 includes a core shaft, and the core shaft includes a flat square 29. The press-fit positioning mechanism includes a base 32 and two slide assemblies 1 located on the base 32. The two slide assemblies 1 are symmetrically arranged. The two slide assemblies 1 are used to match the length requirements of different rod bodies 27 in different traction rod nodes, thereby improving the versatility of the press-fit positioning mechanism. The slide assembly 1 includes a sliding assembly and a support base 5 that can be driven by the sliding assembly to slide horizontally. The upper edge of the support base 5 is vertically provided with an angle adjustment assembly 2, a flexible guide assembly 3 and a positioning assembly 4 from bottom to top. The positioning assembly 4 also includes an upper platform 6 with a machined through groove 7.

[0032] like Figure 2 、 3As shown, the sliding assembly includes a slide rail 21 located on a base 32 and a slider 22 matched to the slide rail 21. The support seat 5 is connected to the upper end of the slider 22, and the support seat 5 can slide horizontally with the slider 22. The sliding assembly also includes a sliding drive unit, which drives the support seat 5 to slide horizontally on the slide rail 21. The sliding drive unit includes two drive seats 23 fixed to the base 32 and located between the slide rails 21. A lead screw 24 is connected between the two drive seats 23, and a lead screw seat 25 connected to the support seat 5 is provided in the middle of the lead screw 24. The lead screw 24 is connected to a sliding drive member 34 located on the outside of the base 32. The sliding drive member 34 drives the lead screw 24 to rotate and drives the lead screw seat 25 and the support seat 5 to slide horizontally, so as to adjust the distance between the two sliding assemblies and further match the processing requirements of rods 27 of different lengths.

[0033] A connecting seat 31 is located at the top of the base 32. The slide rail 21 and the lead screw seat 25 are both connected to this connecting seat 31. Adjusting the position of the connecting seat 31 allows the overall position of the slide assembly 1 to be adjusted, further enhancing the mechanism's adaptability and facilitating component replacement and maintenance. The outer end surface of the upper platform 6 is connected to the corresponding outer end surface of the base 32 via a side seat 26. The machined slot 7, slide rail 21, and lead screw 24 are all arranged parallel to the side seat 26.

[0034] like Figure 3 As shown, the angle adjustment assembly 2 includes an angle disc 17 located on the support seat 5 and an angle driving member 18 connected to the angle disc 17. The angle disc 17 is driven to rotate by the angle driving member 18 to adjust the angle. The angle of the angle disc 17 is matched and adjusted according to the specifications of the rubber node 28; the angle disc 17 is connected to the guide disc 13 by a connecting disc 19, and the angle disc 17 is connected to the support seat 5 by a connecting platform 20, which can improve the stability of the connection and facilitate replacement and maintenance.

[0035] like Figure 1 、 3 As shown in Figure 4, the positioning assembly 4 includes a positioning sleeve 8 and a clamping member 9. The positioning sleeve 8 includes a positioning column 33 located in the middle, and the positioning column 33 is provided with an adjustment through hole 11; during installation, the upper end of the positioning column 33 is passed through the processed through groove 7 to the top of the upper platform 6 and extends into the inner hole 30 of the rod body 27 in the traction rod node, and the flat square 29 of the core shaft in the traction rod node extends into the adjustment through hole 11 and is clamped and positioned in the adjustment through hole 11 by the clamping member 9; the width of the processed through groove 7 is smaller than the width of the rod body 27, and the rod body 27 is mounted on the upper end of the upper platform 6 during processing.

[0036] The clamping member 9 includes a clamping block 35 located within the adjustment hole 11 and a clamping driver 10 located outside the positioning column 33. The positioning column 33 has a drive hole 16 at its lower portion. The power output end of the clamping driver 10 extends from the drive hole 16 and connects to the clamping block 35. The clamping driver 10 drives the clamping block 35 to clamp the flat square 29 within the adjustment hole 11. The adjustment hole 11 is a rectangular hole structure, and the clamping block 35 is arranged in close contact with the side wall of the adjustment hole 11. The positioning sleeve 8 includes a positioning disk 12 arranged circumferentially along the positioning column 33. The drive hole 16 is opened on the positioning column 33 below the positioning disk 12.

[0037] like Figure 3 As shown, the flexible guide assembly 3 includes a guide plate 13 located at the upper end of the angle adjustment assembly 2 and a plurality of guide posts 14 positioned on the guide plate 13. The upper ends of the guide posts 14 are connected to the lower end of the positioning plate 12. Compression springs 15 are sleeved around the guide posts 14. In this embodiment, four guide posts 14 are evenly spaced, each sleeved with a compression spring 15. The upper end of the compression spring 15 is connected to the positioning plate 12, and the lower end of the compression spring 15 is connected to the guide plate 13. The lower portion of the positioning post 33 extends below the positioning plate 12 and is accommodated between the four guide posts 14. The clamping drive 10 is located between adjacent guide posts 14.

[0038] During use, according to the size specifications of the traction rod node, the sliding drive 34 first drives the two support seats 5 to slide horizontally to the corresponding position, and then the rod body 27 is placed on the upper platform 6 and located at the processed groove 7. At this time, the positioning column 33 is located in the inner hole 30 of the rod body 27, and then the rubber node is pressed into the inner hole 30. The flat square 29 of the core shaft of the rubber node extends into the adjustment hole 11, and the clamping block 35 is driven by the clamping drive 10 to clamp the flat square 29.

[0039] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

[0040] The above specific embodiments of the present invention do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A press-fit positioning mechanism for a rail vehicle traction rod node, characterized in that: The invention comprises a base (32) and two slide assemblies (1) located on the base (32) and symmetrically arranged, wherein the slide assembly (1) comprises a sliding assembly and a support seat (5) which can be driven by the sliding assembly to slide horizontally, wherein the support seat (5) is provided with an angle adjustment assembly (2), a flexible guide assembly (3) and a positioning assembly (4) in sequence from bottom to top in the vertical direction, and the positioning assembly (4) further comprises an upper platform (6) with a machined through groove (7); the positioning assembly (4) comprises a positioning sleeve (8) and a clamping member (9), and the positioning sleeve (8) comprises a positioning column (33) located in the middle, and the positioning column (33) is provided with an adjustment through hole (11); The upper end of the positioning column (33) passes through the machined through groove (7) to the upper side of the upper platform (6) and extends into the inner hole (30) of the rod body (27) in the traction rod node. The flat square (29) of the core shaft in the traction rod node extends into the adjustment through hole (11) and is clamped and positioned in the adjustment through hole (11) by the clamping member (9); the clamping member (9) includes a clamping block (35) located in the adjustment through hole (11) and a clamping drive member (10) located outside the positioning column (33). The power output end of the clamping drive member (10) is connected to the clamping block (35) and drives the clamping block (35) to clamp the flat square (29) in the adjustment through hole (11).

2. The press-fit positioning mechanism for a rail vehicle drawbar node according to claim 1, characterized in that: The adjusting through hole (11) is a rectangular hole structure, and the clamping block (35) is arranged close to the hole wall of one side of the adjusting through hole (11); a driving hole (16) is provided at the lower part of the positioning column (33), and the power output end of the clamping driving member (10) extends from the driving hole (16) and is connected to the clamping block (35).

3. The press-fit positioning mechanism for a rail vehicle drawbar node according to claim 2, characterized in that: The flexible guide assembly (3) includes a guide plate (13) located at the upper end of the angle adjustment assembly (2) and a plurality of guide posts (14) each placed on the guide plate (13); the positioning sleeve (8) includes a positioning plate (12) arranged along the circumference of the positioning post (33), and the upper ends of the plurality of guide posts (14) are connected to the lower end of the positioning plate (12); and a compression spring (15) is provided on the guide post (14).

4. The press-fit positioning mechanism for a rail vehicle drawbar node according to claim 3, characterized in that: The lower portion of the positioning column (33) extends below the positioning plate (12) and is accommodated between a plurality of guide columns (14); a drive hole (16) is provided on the positioning column (33) below the positioning plate (12), and the clamping drive member (10) is located between adjacent guide columns (14).

5. The press-fit positioning mechanism for a rail vehicle drawbar node according to claim 4, characterized in that: The angle adjustment assembly (2) comprises an angle disc (17) located on the support seat (5) and an angle driving member (18) connected to the angle disc (17); the angle disc (17) and the guide disc (13) are connected via a connecting disc (19), and the angle disc (17) and the support seat (5) are connected via a connecting platform (20).

6. The press-fit positioning mechanism for a rail vehicle drawbar node according to any one of claims 1 to 5, characterized in that: The sliding assembly includes a slide rail (21) located on a base (32) and a slider (22) matched with the slide rail (21), and the support seat (5) is connected to the upper end of the slider (22); the sliding assembly also includes a sliding drive unit, and the support seat (5) is driven by the sliding drive unit to slide horizontally on the slide rail (21).

7. The press-fit positioning mechanism for a rail vehicle drawbar node according to claim 6, characterized in that: The sliding drive unit comprises two drive seats (23) fixed on a base (32) and located between the slide rails (21); a lead screw (24) is connected between the two drive seats (23); and a lead screw seat (25) connected to the support seat (5) is provided in the middle of the lead screw (24); the lead screw (24) is connected to a sliding drive member (34) located outside the base (32), and the lead screw (24) is driven by the sliding drive member (34) to drive the lead screw seat (25) and the support seat (5) to slide horizontally.

8. The press-fit positioning mechanism for a rail vehicle drawbar node according to claim 7, characterized in that: A connecting seat (31) is provided at the upper end of the base (32); the slide rail (21) and the screw seat (25) are both connected to the connecting seat (31).

9. The press-fit positioning mechanism for a rail vehicle drawbar node according to claim 8, characterized in that: One side outer end surface of the upper platform (6) is connected to the corresponding side outer end surface of the base (32) via a side seat (26); the processing slot (7), the slide rail (21) and the lead screw (24) are all arranged parallel to the side seat (26).

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