Anti-falling positioning column connected with wedge-shaped hinge and machining tool

Abstract

The utility model belongs to the technical field of contact network, concretely relates to a kind of anti-drop type positioning stand column and processing frock connected by wedge hinge, including upper hoop, lower hoop and stand column, upper hoop one end is formed with first hinge ring, the other end is formed with first fastening part, and first hinge ring has first wedge surface, lower hoop one end is formed with second hinge ring, the other end is formed second fastening part, and the side of second hinge ring towards first wedge surface is formed with second wedge surface for cooperating with first wedge surface to limit the opening and closing amplitude of upper hoop and lower hoop;The utility model improves the stress state in the service process of positioning stand column, converts most shear stress into stress perpendicular to contact surface, improves its fatigue performance and service time;And its wedge hinge connecting structure limits the rotation angle of upper hoop, so that positioning stand column will not be off pipe in the case of bolt loosening and falling off, has anti-drop function, improves the security and stability of system.

Description

Technical Field

[0001] This utility model belongs to the field of contact wire technology, specifically relating to a wedge-shaped hinged anti-detachment positioning column and processing tooling. Background Technology

[0002] Positioning columns are a component of the simplified positioning device for high-speed railway catenary. They generally include an upper clamp, a lower clamp, and a column. In existing positioning columns, the hinge is a regular cylindrical structure. During the forging process, there are problems such as folding of the forging flow line, difficulty in forming parts at the hinge, and difficulty in metal flow. Moreover, when a train passes, it will cause displacement of the positioning column in the vertical and horizontal directions, resulting in oblique shear stress at the connection. Under long-term service, the connection is prone to fatigue failure. Furthermore, if the bolts of traditional positioning columns loosen and fall off, they may also detach from the pipe, which can easily lead to further accidents and pose safety risks to the high-speed railway line. Utility Model Content

[0003] The technical problem to be solved by this utility model is that, in order to solve the problems of the hinge ring of the positioning column in the prior art being a regular column structure, which has problems such as folding of the forging flow line, difficulty in forming parts at the hinge ring, and difficulty in metal flow during the forging process, and that the traditional positioning column may also detach from the pipe when the bolt is loose, which can easily lead to further escalation of the accident and bring safety risks to the high-speed rail line, this utility model provides a wedge-shaped hinge ring connection anti-detachment positioning column and processing tooling.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a wedge-shaped hinged anti-detachment positioning column, comprising:

[0005] The upper clamp has a first hinge ring at one end and a first fastening part at the other end, and the first hinge ring has a first wedge surface;

[0006] The lower clamp has a second hinge ring formed at one end for engaging with the first hinge ring, and a second fastening part formed at the other end for fixing with the first fastening part. The second hinge ring has a second wedge surface formed on the side facing the first wedge surface for engaging with the first wedge surface to limit the opening and closing range of the upper clamp and the lower clamp.

[0007] And the column, which is fixed to the lower clamp.

[0008] Furthermore, the number of the first hinge ring is at least one, and the number of the second hinge ring is at least two. The two second hinge rings are distributed on both sides of the first hinge ring and respectively engage with the two first wedge surfaces on the first hinge ring.

[0009] Furthermore, the two first wedge surfaces on the first hinge ring gradually approach each other along the direction away from the first fastening part.

[0010] Furthermore, the inclination angle α of the first wedge surface is 20°±1°.

[0011] Furthermore, the upper and lower clamps each have reinforcing ribs protruding on their opposite sides.

[0012] A machining fixture includes a fixture base, a limiting post slidably mounted above the fixture base for being surrounded by an upper clamp and a lower clamp, a limiting member located on the moving path of the limiting post and used to abut against the upper clamp to fix the upper clamp and the lower clamp, and a returning elastic member used to drive the limiting post to return to its original position.

[0013] Furthermore, a return slider is fixed at the bottom of the limiting post, and the tooling base forms a groove for the return slider to slide. One end of the return elastic element abuts against the return slider, and the other end abuts against the groove wall.

[0014] Furthermore, the limiting member includes a first limiting part for abutting against the first fastening part of the upper clamp and a second limiting part for abutting against the middle part of the upper clamp, and both the first limiting part and the second limiting part are integrally formed with the tooling base.

[0015] Furthermore, the bottom of the return slider protrudes to form a positioning part, and the bottom of the slide groove expands to form a positioning groove for accommodating the positioning part to limit the upward movement of the return slider.

[0016] Furthermore, the limiting post includes a post body and an extension body extending radially from the post body, wherein the first fastening part and the second fastening part clamp the extension body.

[0017] The beneficial effects of this utility model are:

[0018] (1) This utility model improves the stress state of the positioning column during service, converting most of the shear stress into stress perpendicular to the contact surface, thereby improving its fatigue performance and service time; and its wedge-shaped hinge connection structure restricts the rotation angle of the upper clamp, so that the positioning column will not come off the pipe even if the bolts are loose and fall off, thus having an anti-loosening function and improving the safety and stability of the system.

[0019] (2) The present invention has designed a matching processing fixture, which allows the upper clamp and the lower clamp to be drilled at the same time, ensuring the concentricity of the rivet holes on the upper clamp and the lower clamp, improving the processing accuracy and fitting accuracy, enabling the flanged rivet to be drilled without obstruction during assembly, and improving the processing efficiency and product qualification rate.

[0020] (3) The forging flow line of this utility model is more reasonable, which improves the flow performance of the billet during the forging process, makes it easier to fill the mold, and the forging flow line at the hinge is more uniform. Through static simulation, it can be seen that the mechanical properties of the new structural parts are better, the stress concentration points are reduced, and fatigue failure is avoided as much as possible.

[0021] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a three-dimensional structural diagram of the positioning column in this utility model;

[0024] Figure 2 This is the front view of the positioning column in this utility model;

[0025] Figure 3 This is a top view of the positioning column in this utility model;

[0026] Figure 4 This is an exploded view of the positioning column in this utility model;

[0027] Figure 5 It is a three-dimensional schematic diagram of the machining tooling and the positioning column.

[0028] Figure 6 It is a top view of the machining fixture and the positioning column in conjunction;

[0029] Figure 7 yes Figure 6 A cross-sectional view along the AA direction;

[0030] Figure 8 This is a three-dimensional structural diagram of the machining tooling in this utility model;

[0031] Figure 9 This is an exploded view of the machining tooling in this utility model;

[0032] Figure 10 This is a stress distribution diagram of a traditional positioning column;

[0033] Figure 11 This is a stress distribution diagram of this utility model;

[0034] Figure 12 This is a simulation diagram of forging deformation at the hinge of a traditional positioning column (with folding present);

[0035] Figure 13 This is a simulation diagram of the forging deformation at the hinge of this utility model;

[0036] In the picture:

[0037] 1. Upper clamp; 101. First hinge ring; 1011. First wedge surface; 102. First fastening part;

[0038] 2. Lower clamp; 201. Second hinge ring; 2011. Second wedge surface; 202. Second fastening part;

[0039] 3. Columns;

[0040] 4. Reinforcing ribs;

[0041] 5. Tooling base; 501. Slide groove; 502. Positioning groove;

[0042] 6. Limiting post; 601. Extension body;

[0043] 7. Return elastic element;

[0044] 8. Return slider; 801. Positioning part;

[0045] 9. Limiting component; 901. First limiting part; 902. Second limiting part. Detailed Implementation

[0046] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention. Therefore, they only show the components relevant to the present invention. Orientations and references (e.g., up, down, left, right, etc.) are only used to aid in the description of the features in the drawings. Therefore, the following specific embodiments are not intended to be restrictive, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0047] like Figures 1-4 As shown, a wedge-shaped hinged anti-detachment positioning column includes an upper clamp 1, a lower clamp 2 and a column 3. The column 3 is fixed to the lower clamp 2. The upper clamp 1 and the lower clamp 2 are both roughly semi-circular structures, and the two clamp together to hold the positioning tube located between them.

[0048] The upper clamp 1 has a first hinge ring 101 formed at one end and a first fastening part 102 formed at the other end, and the first hinge ring 101 has a first wedge surface 1011;

[0049] The lower clamp 2 has a second hinge 201 formed at one end for cooperating with the first hinge 101, and a second fastening part 202 formed at the other end for fixing with the first fastening part 102. The first fastening part 102 and the second fastening part 202 are fixed by bolts. The number of bolts can be, but is not limited to, one, two or three, etc. The second fastening part 202 is provided with a receiving groove for accommodating a nut. The receiving groove has an irregular structure to prevent the nut inside from rotating.

[0050] The second hinge ring 201 has a second wedge surface 2011 formed on the side facing the first wedge surface 1011 for cooperating with the first wedge surface 1011 to limit the opening and closing range of the upper clamp 1 and the lower clamp 2. Through the cooperation of the first wedge surface 1011 and the second wedge surface 2011, the maximum opening of the upper clamp 1 and the lower clamp 2 is 10° after the rivets are installed. This ensures that the positioning column 3 will not fall off the pipe even if the bolts of the first fastening part 102 and the second fastening part 202 are loose and fall off, which can minimize accident losses and improve overall safety.

[0051] The forging streamlines described in this application optimize the metal flow path and deformation mode, resulting in a more rational distribution of fiber structure along the stress direction of the hinge ring, significantly improving the overall performance of the forging. This process combines die forging with local precision forming, ensuring material density while significantly improving the microstructure of the hinge ring area, resulting in a substantial increase in streamline continuity compared to traditional parts. The improved streamline distribution effectively reduces stress concentration at the hinge ring, significantly extending fatigue life. This structure exhibits superior reliability under complex alternating load conditions, solving the problem of early cracking at high-stress hinge ring areas, and elevating the comprehensive mechanical properties of the forging to a new level.

[0052] The forming process of the hinge area has been significantly improved. By optimizing the die structure and forging parameters, the metal flow in this area is made more rational, effectively reducing the degree of local deformation. The improved process results in a more uniform material deformation distribution, avoiding the localized excessive deformation phenomenon common in traditional methods. This uniform deformation not only ensures the accuracy of the hinge area's geometry but, more importantly, improves the microstructure of this area, laying a solid foundation for enhanced performance in subsequent applications. Throughout the forming process, the metal flow lines exhibit an ideal continuous distribution along the direction of force, significantly improving the structural integrity and mechanical properties of the hinge area, such as... Figure 12 and Figure 13 As shown.

[0053] In some examples, there is at least one first hinge ring 101 and at least two second hinge rings 201. The two second hinge rings 201 are distributed on both sides of the first hinge ring 101 and respectively cooperate with the two first wedge surfaces 1011 on the first hinge ring 101. The two second hinge rings 201 increase the volume of the lower clamp 2 to a certain extent, thereby improving the structural strength. The two second hinge rings 201 clamp the first hinge ring 101 between them, so that the two second wedge surfaces 2011 correspond one-to-one with the two first wedge surfaces 1011 on the first hinge ring 101.

[0054] In some examples, the two first wedge surfaces 1011 on the first hinge 101 gradually approach each other in the direction away from the first fastening part 102, so that the cross-sectional area of ​​the first hinge 101 gradually decreases in the direction away from the first fastening part 102, thereby improving the structural strength of the first hinge 101. The cross-sectional area of ​​the second hinge 201 gradually decreases in the direction away from the second fastening part 202, thereby improving the structural strength of the second hinge 201.

[0055] In some examples, the inclination angle α of the first wedge surface 1011 is 20°±1°. Through analysis and simulation of the actual stress state of the part, when the design angle between the first wedge surface 1011 and the vertical plane is 20°, the oblique shear stress can be kept as perpendicular to the stress surface as possible, so that most of the shear stress is converted into stress perpendicular to the contact surface, avoiding fatigue fracture at weak points caused by frequent tangential forces, and improving the stress state of the positioning column 3, such as... Figure 10 and Figure 11 As shown.

[0056] In some examples, the upper clamp 1 and the lower clamp 2 have reinforcing ribs 4 protruding from their opposite sides. There are two reinforcing ribs 4 on both the upper clamp 1 and the lower clamp 2, and they are distributed on the edges of the upper clamp 1 and the lower clamp 2 respectively.

[0057] In some examples, such as Figures 5-9 As shown, the upper clamp 1 and lower clamp 2 of the traditional positioning column 3 need to be processed separately, which affects the concentricity of the two rivet holes. When the error is large, it may lead to difficulty in rivet drilling, affecting assembly efficiency and product qualification rate. This application provides a processing fixture, including a fixture base 5, a limiting column 6 slidably installed above the fixture base 5 for the upper clamp 1 and lower clamp 2 to be surrounded, a limiting member 9 located on the moving path of the limiting column 6 and used to abut against the upper clamp 1 to fix the upper clamp 1 and lower clamp 2, and a returning elastic member 7 used to drive the limiting column 6 to return to its original position.

[0058] During processing, the machining fixture is first placed in the vise, and the upper clamp 1 and lower clamp 2 are placed inside. The two clamps hold the limiting post 6. When the vise is clamped, the upper clamp 1 and lower clamp 2 will move forward with the limiting post 6, and the return elastic element 7 is compressed. When the upper clamp 1 and lower clamp 2 move to the position of the limiting element 9, the limiting element 9 will hold the upper clamp 1 and limit it. The column 3 on the lower clamp 2 is held by the vise, and the planes are mutually restricted, so they cannot move or rotate. At this time, the relative positions of the upper clamp 1 and lower clamp 2 are fixed and cannot move. At this time, drilling is started, which can ensure the concentricity of the rivet holes on the upper clamp 1 and lower clamp 2 and avoid the phenomenon that the rivet cannot pass through the rivet hole. Therefore, the diameter of the rivet hole can be further reduced. By reducing the diameter of the rivet hole, the contact area between the rivet and the hole wall is increased, thereby avoiding stress concentration on the hole wall and enhancing the fatigue resistance of the clamp hinge.

[0059] In some examples, the bottom of the limiting post 6 is fixed with a return slider 8, the tooling base 5 forms a groove 501 for the return slider 8 to slide, one end of the return elastic member 7 abuts against the return slider 8, and the other end abuts against the groove wall of the groove 501. Both the return slider 8 and the tooling base 5 are provided with mounting grooves for the return elastic member 7 to be installed.

[0060] In some examples, the limiting member 9 includes a first limiting part 901 for abutting against the first fastening part 102 of the upper clamp 1 and a second limiting part 902 for abutting against the middle part of the upper clamp 1. Both the first limiting part 901 and the second limiting part 902 are integrally formed with the tooling base 5, and the second limiting part 902 has a recessed groove for accommodating the upper reinforcing rib 4 of the upper clamp 1.

[0061] In some examples, the bottom of the return slider 8 protrudes to form a positioning part 801, and the bottom of the slide groove 501 expands to form a positioning groove 502 for accommodating the positioning part 801 to restrict the upward movement of the return slider 8. Therefore, the positioning part 801 can restrict the upward movement of the return slider 8, and the limiting post 6 can restrict the downward movement of the return slider 8. Both the return slider 8 and the slide groove 501 are approximately rectangular structures, which can prevent the limiting post 6 from rotating.

[0062] In some examples, the limiting post 6 includes a post body and an extension 601 extending radially from the post body, wherein the first fastening part 102 and the second fastening part 202 clamp the extension 601.

[0063] The above description, based on the preferred embodiments of this utility model, provides inspiration. Those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification but must be determined according to the claims.

Claims

1. A wedge-shaped hinged anti-detachment positioning column, characterized in that: include: The upper clamp (1) has a first hinge ring (101) formed at one end and a first fastening part (102) formed at the other end, and the first hinge ring (101) has a first wedge surface (1011); The lower clamp (2) has a second hinge (201) formed at one end for engaging with the first hinge (101), and a second fastening part (202) formed at the other end for fixing with the first fastening part (102). The second hinge (201) has a second wedge surface (2011) formed on the side facing the first wedge surface (1011) for engaging with the first wedge surface (1011) to limit the opening and closing range of the upper clamp (1) and the lower clamp (2). and the column (3), which is fixed to the lower clamp (2).

2. The anti-detachment positioning column with a wedge-shaped hinge connection according to claim 1, characterized in that: The number of first hinge rings (101) is at least one, and the number of second hinge rings (201) is at least two. The two second hinge rings (201) are distributed on both sides of the first hinge ring (101) and respectively cooperate with the two first wedge surfaces (1011) on the first hinge ring (101).

3. The anti-detachment positioning column with a wedge-shaped hinge connection according to claim 2, characterized in that: The two first wedge surfaces (1011) on the first hinge ring (101) gradually approach each other in the direction away from the first fastening part (102).

4. The anti-detachment positioning column with a wedge-shaped hinge connection according to claim 3, characterized in that: The tilt angle α of the first wedge surface (1011) is 20°±1°.

5. The anti-detachment positioning column with a wedge-shaped hinge connection according to claim 3, characterized in that: The upper clamp (1) and the lower clamp (2) both have reinforcing ribs (4) protruding on opposite sides.

6. A machining fixture for machining a wedge-shaped hinge connection anti-disengagement positioning column as described in any one of claims 1-5, characterized in that: It includes a tooling base (5), a limiting post (6) that is slidably mounted above the tooling base (5) for the upper clamp (1) and lower clamp (2) to encircle it, a limiting member (9) located on the moving path of the limiting post (6) and used to abut against the upper clamp (1) to fix the upper clamp (1) and lower clamp (2), and a returning elastic member (7) used to drive the limiting post (6) to return to its original position.

7. A machining fixture according to claim 6, characterized in that: The bottom of the limiting post (6) is fixed with a return slider (8), and the tooling base (5) forms a groove (501) for the return slider (8) to slide. One end of the return elastic member (7) abuts against the return slider (8), and the other end abuts against the groove wall of the groove (501).

8. A machining fixture according to claim 6, characterized in that: The limiting member (9) includes a first limiting part (901) for abutting against the first fastening part (102) of the upper clamp (1) and a second limiting part (902) for abutting against the middle part of the upper clamp (1), and the first limiting part (901) and the second limiting part (902) are integrally formed with the tooling base (5).

9. A machining fixture according to claim 7, characterized in that: The bottom of the return slider (8) protrudes to form a positioning part (801), and the bottom of the slide groove (501) expands to form a positioning groove (502) for accommodating the positioning part (801) to restrict the upward movement of the return slider (8).

10. A machining fixture according to claim 6, characterized in that: The limiting post (6) includes a post body and an extension body (601) extending radially from the post body, wherein the first fastening part (102) and the second fastening part (202) clamp the extension body (601).

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