Connecting structure of cloth truss

Abstract

The utility model discloses a connecting structure of cloth truss, the connecting structure includes connecting piece, frame, baffle plate, pin roll, said frame is provided with base, the circumference of base is evenly provided with three bolt hole no. 1, three bolt hole no. 1 is located the vertex of regular triangle, baffle plate and base pass through first bolt connection, and the pin roll passes through the first bolt connection. The baffle is connected with the pin shaft through the second bolt, the baffle is made of alloy steel, the surface of the baffle is coated with an anti-corrosion and wear-resistant coating, the first bolt and the second bolt are M8 bolts, the M8 bolts are made of carbon structural steel with the tensile strength grade not lower than 10.9 grade, and when the pin shaft is subjected to axial force, the baffle can restrain the pin shaft from three different directions through the three first bolts. The pin shaft is kept stable when equipment runs, the situation that due to axial force, the first bolt is broken, the baffle is damaged, and the transverse displacement of the pin shaft is too large is effectively avoided, and therefore the stability, reliability and safety of the material distributing machine are improved.

Description

Technical Field

[0001] This utility model relates to the field of tracked concrete placing machine technology, and in particular to a concrete placing truss connection structure. Background Technology

[0002] Tracked concrete placing booms are equipment used for large-volume concrete pouring. They mainly consist of a traveling mechanism 1, a loading mechanism 2, and a placing truss 3. The traveling mechanism 1 and the placing truss 3 are connected by a connecting structure 4. Figure 7-8 As shown, the existing fabric truss connection structure 4 includes a connector 31, a frame 5, a baffle 7, and a pin 8. A base 6 is provided on the frame 5. The base 6 and the connector 31 are connected by the pin 8 at their hinged positions. The baffle 7 is connected to the base 6 by a first bolt 9, and the baffle 7 is connected to the pin 8 by a second bolt 10. This connection structure has the following problems: the strength of the baffle 7, the first bolt 9, and the second bolt 10 is insufficient. During the up-and-down swinging of the fabric truss 3, although the baffle 7 can offset the radial torque generated by the friction of the pin 8 during the up-and-down swinging of the fabric truss 3, it is not enough to offset the axial force generated by the movement of the pin 8. This axial force causes the first bolt 9 at the connection between the baffle 7 and the base 6 to break, and the baffle 7 to be damaged. This results in excessive lateral displacement of the pin 8, causing the fabric truss 3 to detach from the traveling mechanism 1, affecting the stability of the connection between the fabric truss 3 and the traveling mechanism 1. Utility Model Content

[0003] One of the objectives of this utility model is, at least, to provide a connection structure for a fabric truss that addresses the problems of bolt breakage, baffle damage, and pin misalignment caused by axial force generated by pin movement, thereby improving the stability, reliability, and safety of the fabric placing machine.

[0004] To achieve the above objectives, the technical solution adopted by this utility model includes the following aspects.

[0005] A connection structure for a fabric truss includes a connector, a frame, a baffle, and a pin. A base is provided on the frame, and the hinged position of the base and the connector is connected by a pin. The base has three bolt holes circumferentially evenly distributed around its apex, with the three bolt holes occupies the vertices of an equilateral triangle. The baffle has three bolt holes corresponding to the bolt holes 1 and 2. The baffle is connected to the base by a first bolt, and the baffle is connected to the pin by a second bolt.

[0006] Preferably, the pin passes through the base, frame and connector from right to left, with the two end faces of the pin respectively fitting against the inner side of the baffle, and two second bolts are provided at each end of the pin.

[0007] Preferably, the baffle is groove-shaped and includes a first connecting part and a second connecting part coaxially arranged. The second connecting part protrudes from the outer side of the first connecting part in a direction away from the base. The groove is formed by the inner side of the first connecting part being recessed. The groove is coaxial with the first connecting part. The first connecting part has three bolt holes 2 evenly arranged circumferentially. The first connecting part is connected to the base by a first bolt. The second connecting part has two bolt holes 3 and the pin end has two bolt holes 4. The bolt holes 3 and 4 are arranged correspondingly. The pin end is inserted into the groove of the baffle and connected to the second connecting part by a second bolt.

[0008] Preferably, a washer is provided between the second connecting part and the end of the pin. After the second bolt passes through the second connecting part and the washer, it is connected to the pin. The washer is attached to the inner side of the second connecting part.

[0009] Preferably, the pin passes through the baffle, base, frame and connector sequentially from right to left. Both ends of the pin are coaxially provided with pin protrusions. The diameter of the pin protrusions is smaller than the diameter of the pin. The end faces of the pin are pin connection parts, and two bolt holes are provided on the pin connection parts.

[0010] Preferably, the baffle has a circular hole with a diameter larger than the diameter of the pin protrusion but smaller than the diameter of the pin. The pin protrusion passes through the circular hole in the baffle, and the inner side of the baffle is in contact with the pin connection part and also with the base surface.

[0011] Preferably, the baffle includes a baffle one and a baffle two, with three bolt holes two on the baffle, one of which is on the baffle one and the other two are on the baffle two. After the baffle one and the baffle two are connected, the three bolt holes two are arranged in an equilateral triangle. The overall structure of the baffle one and the baffle two is semi-circular.

[0012] Preferably, the first baffle and the second baffle are connected to the base by a first bolt. The first baffle is provided with a third connecting part at both ends. The third connecting part extends from the top surface of the first baffle to the bottom surface. The thickness of the third connecting part is not greater than the thickness of the first baffle. The second baffle is provided with a fourth connecting part at both ends. The fourth connecting part extends from the bottom surface of the second baffle to the top surface. The thickness of the fourth connecting part is not greater than the thickness of the second baffle. The third connecting part and the fourth connecting part are joined together. A bolt hole six is ​​opened on the third connecting part and a bolt hole seven is opened on the fourth connecting part. Bolt holes five, six and seven are arranged correspondingly. The second bolt passes through the third connecting part and the fourth connecting part and is connected to the pin connecting part.

[0013] Preferably, both the base and the baffle have circular cross-sections, the baffle is coaxial with the base, and the diameter of the baffle is not greater than the diameter of the base.

[0014] Preferably, the baffle is made of alloy steel and the surface of the baffle is coated with an anti-corrosion and wear-resistant coating; the first bolt and the second bolt are both M8 bolts, the M8 bolts are made of carbon structural steel, and the tensile strength grade of the M8 bolts is not less than 10.9.

[0015] In summary, by adopting the above technical solution, this utility model has at least the following beneficial effects:

[0016] When the pin is subjected to axial force, the baffle can constrain the pin from three different directions through the three first bolts, so that the pin remains stable during equipment operation. This effectively avoids the situation where the first bolts break due to axial force, the baffle is damaged, and the lateral displacement of the pin is too large, thereby improving the stability, reliability and safety of the concrete placing machine. Attached Figure Description

[0017] Figure 1 This is an elevation view of a tracked concrete placing boom.

[0018] Figure 2 This is an enlarged view of the first connection structure of the fabric laying machine truss of an exemplary embodiment of this utility model.

[0019] Figure 3 This is an enlarged schematic diagram from another perspective of the first connection structure of the fabric laying machine truss of an exemplary embodiment of this utility model.

[0020] Figure 4 This is an enlarged schematic diagram from another perspective of the second connection structure of the fabric laying machine truss of an exemplary embodiment of this utility model.

[0021] Figure 5 This is an enlarged schematic diagram from another perspective of the third connection structure of the fabric laying machine truss of an exemplary embodiment of this utility model.

[0022] Figure 6 This is a schematic diagram of the baffle structure of the third connection structure of the fabric laying machine truss in an exemplary embodiment of this utility model.

[0023] Figure 7 This is an enlarged view of the connection structure of the existing fabric placing machine truss.

[0024] Figure 8 This is an enlarged schematic diagram of the connection structure of the existing fabric placing machine truss from another perspective.

[0025] Figure 9 This is a schematic diagram of the existing fabric placing boom truss connection structure after the pins have shifted.

[0026] The diagram is labeled as follows: 1-Walking mechanism, 2-Feeding mechanism, 3-Fabrication truss, 31-Connector, 4-Connecting structure, 5-Frame, 6-Base, 7-Baffle, 71-First connecting part, 72-Second connecting part, 73-Baffle one, 74-Baffle two, 75-Third connecting part, 76-Fourth connecting part, 8-Pin, 81-Pin protrusion, 82-Pin connecting part, 9-First bolt, 10-Second bolt, 11-Washer. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, so that the purpose, technical solution and advantages of the present invention will be clearer. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Example 1

[0028] Figure 1 The structure of the fabric placing machine is shown, including a connecting structure 4 for connecting the traveling mechanism 1 and the fabric placing truss 3. The traveling mechanism 1 is equipped with a frame 5, and the fabric placing truss 3 is equipped with a connector 31 (see reference). Figure 2 , Figure 3 The connecting structure 4 includes a connector 31, a frame 5, a baffle 7, and a pin 8. A base 6 is mounted on the frame 5, and the base 6 and connector 31 are hinged together using the pin 8. The base 6 has three bolt holes (I) evenly spaced circumferentially, located at the vertices of an equilateral triangle. The baffle 7 has three bolt holes (II), corresponding to the bolt holes (I and II). The baffle 7 is connected to the base 6 by a first bolt 9, and to the pin 8 by a second bolt 10. This design solves the problem of axial force generated by the movement of the pin 8 causing the first bolt 9 to break, the baffle 7 to be damaged, and the pin 8 to move, thereby improving the stability, reliability, and safety of the fabric placing machine.

[0029] One end of the frame 5 is U-shaped (see reference). Figure 3 , Figure 4 The inner side of the U-shaped groove is fitted with the connector 31, and the outer side is provided with a base 6. A baffle 7 is provided on the base 6. The cross-section of the baffle 7 is circular. The baffle 7 is coaxial with the base 6. The pin 8 runs from right to left. Figure 3 (From left to right) It passes through the base 6, frame 5 and connector 31 in sequence. The two end faces of the pin 8 are respectively attached to the inner side of the baffle 7. After the baffle 7 is connected to the base 6 by the first bolt 9 and the baffle 7 is connected to the pin 8 by the second bolt 10, the axial movement of the pin 8 can be fully prevented and the lateral displacement of the pin 8 can be reduced. Example 2

[0030] The difference between the connection structure 4 in this embodiment and the connection structure 4 in embodiment 1 is that the baffle 7 is groove-shaped. The baffle 7 includes a first connecting part 71 and a second connecting part 72 arranged coaxially. The second connecting part 72 protrudes from the outer side of the first connecting part 71 in a direction away from the base 6. The groove is formed by the inner side of the first connecting part 71. The groove is coaxial with the first connecting part 71. The first connecting part 71 has three bolt holes 2 evenly spaced circumferentially. The first connecting part 71 is connected to the base 6 by a first bolt 9. The second connecting part 72 has two bolt holes 3. The pin 8 has two bolt holes 4 at its end. The bolt holes 3 and 4 are arranged correspondingly. The end of the pin 8 is inserted into the baffle. The pin 8 is connected to the second connecting part 72 through the groove of the baffle 7 and the second bolt 10. When the pin 8 cannot fit with the inner side of the baffle 7 due to manufacturing error, the groove on the baffle 7 provides a space for the pin 8 to be accommodated, which is conducive to the fit and connection between the baffle 7 and the pin 8, and between the baffle 7 and the base 6. According to the distance between the end of the pin 8 and the second connecting part 72, a shim 11 can be set. After the second bolt 10 passes through the second connecting part 72 and the shim 11 axially, it is connected to the pin 8. The shim 11 can be pasted on the inner side of the second connecting part 72. The shim 11 is elastic. After the end of the pin 8 fits with the surface of the shim 11, it is conducive to preventing the pin 8 from moving axially and further reducing the lateral displacement of the pin 8. Example 3

[0031] like Figure 5-6 As shown, pin 8 is arranged from right to left ( Figure 5(From left to right) The pin 8 passes through the baffle 7, base 6, frame 5 and connector 31 in sequence. The end of the pin 8 is protruding. Both ends of the pin 8 are coaxially provided with pin protrusions 81. The diameter of the pin protrusions 81 is smaller than the diameter of the pin 8. The end faces of the pin 8 are pin connecting parts 82. Two bolt holes are opened on the pin connecting parts 82. A round hole is opened on the baffle 7. The diameter of the round hole on the baffle 7 is larger than the diameter of the pin protrusions 81 but smaller than the diameter of the pin 8. The pin protrusions 81 pass through the round hole on the baffle 7. The inner side of the baffle 7 is in contact with the pin connecting parts 82 and also in contact with the surface of the base 6. The baffle 7 includes a first baffle 73 and a second baffle 74. Three bolt holes are provided on the baffle 7, one in the first baffle 73 and the other two in the second baffle 74. After the first baffle 73 and the second baffle 74 are connected, the three bolt holes are arranged in an equilateral triangle. The overall structure of the first baffle 73 and the second baffle 74 is semi-circular. The first baffle 73 and the second baffle 74 are connected to the base 6 by a first bolt 9. A third connecting part 75 is provided at each end of the first baffle 73, extending from the top surface of the first baffle 73 to the bottom surface. The thickness of the third connecting part 75 is... The thickness of the second baffle 74 is not greater than the thickness of the first baffle 73. The two ends of the second baffle 74 are respectively provided with a fourth connecting part 76. The fourth connecting part 76 extends from the bottom surface of the second baffle 74 to the top surface. The thickness of the fourth connecting part 76 is not greater than the thickness of the second baffle 74. The third connecting part 75 and the fourth connecting part 76 can be completely spliced. A bolt hole six is ​​opened on the third connecting part 75, and a bolt hole seven (not shown in the figure) is opened on the fourth connecting part 76. Bolt holes five, six and seven are set correspondingly. The second bolt 10 passes through the third connecting part 75 and the fourth connecting part 76 and is connected to the pin 8.

[0032] In any of the aforementioned embodiments, the base 6 has a circular cross-section, and the circumferential surface of the base 6 does not exceed the surface of the frame 5. The three bolt holes provided on the base 6 are located at the vertices of an equilateral triangle. The equilateral triangle has unique geometric stability and can evenly distribute the force mechanically. The plane formed by the three points can provide more comprehensive support. When the pin 8 is subjected to axial force, the baffle 7 constrains the pin 8 from three different directions through three first bolts 9. The component forces in the three directions act on the support points corresponding to the three bolt hole positions, so that the force borne by each point is relatively small and evenly distributed. Compared with the existing method of only providing one first bolt 9 on the base 6, it can more effectively resist the axial force on the pin 8.

[0033] The diameter of the baffle 7 is no greater than the diameter of the base 6. The specific dimensions of the baffle 7 are determined according to the position of the base 6 to ensure that the bearing area of ​​the baffle 7 is maximized while meeting the installation requirements, thereby reducing the pressure per unit area. The baffle 7 is made of alloy steel. Compared with the existing carbon steel baffle, alloy steel has higher yield strength and tensile strength and can withstand greater pressure. At the same time, the surface of the baffle 7 is treated with an anti-corrosion and wear-resistant coating to prevent the strength of the baffle 7 from being reduced due to corrosion and wear during long-term use.

[0034] Two second bolts 10 are respectively provided at both ends of the pin 8. The second bolts 10 are used to connect the pin 8 and the baffle 7 to prevent the pin 8 from falling off.

[0035] Both the first bolt 9 and the second bolt 10 are M8 bolts. M8 bolts are made of carbon structural steel, and after heat treatment, their tensile strength grade is not less than 10.9. Compared to the existing 8.8 grade M8*40 bolts, M8 bolts have a significantly improved strength (in Embodiment 3, the diameter of the second bolt 10 is not greater than the diameter of the first bolt 9). Simultaneously, when installing the first bolt 9 and the second bolt 10, a precise torque wrench is used to tighten them according to the specified torque value, ensuring that the bolts provide sufficient tightening force during equipment operation without causing damage to the baffle 7 or the bolt holes at the first bolt 9 and the second bolt 10 due to excessive preload.

[0036] The above description is merely a detailed illustration of specific embodiments of this utility model, and not a limitation thereof. Various substitutions, modifications, and improvements made by those skilled in the art without departing from the principles and scope of this utility model should be included within the protection scope of this utility model.

Claims

1. A connection structure for a fabric truss, characterized in that, Include: The connecting piece (31), rack (5), baffle (7) and pin shaft (8), the base (6) is arranged on the rack (5), the hinge position of the base (6) and the connecting piece (31) is connected with pin shaft (8), three bolt holes one are evenly provided on the base (6) circumferentially, three bolt holes one are at the vertex of equilateral triangle, three bolt holes two are provided on the baffle (7), bolt hole one and bolt hole two are correspondingly arranged, the baffle (7) is connected with the base (6) through first bolt (9), the baffle (7) is connected with pin shaft (8) through second bolt (10).

2. The connection structure of a cloth truss according to claim 1, wherein The pin shaft (8) is sequentially penetrated through the base (6), the rack (5) and the connecting piece (31) from right to left, the end faces of the two ends of the pin shaft (8) are respectively attached to the inner side of the baffle (7), and the two ends of the pin shaft (8) are respectively provided with two second bolts (10).

3. The connection structure of a cloth truss according to claim 2, wherein The baffle (7) is recessed, and the baffle (7) comprises a first connecting part (71) and a second connecting part (72) arranged coaxially, the second connecting part (72) is protruded from the outer side of the first connecting part (71) to the direction away from the base (6), the recess is formed by the inner side of the first connecting part (71) being concave, the recess is coaxial with the first connecting part (71), three bolt holes two are evenly provided on the first connecting part (71) circumferentially, the first connecting part (71) is connected with the base (6) through the first bolt (9), two bolt holes three are provided on the second connecting part (72), two bolt holes four are provided on the end of the pin shaft (8), bolt hole three and bolt hole four are correspondingly arranged, the end of the pin shaft (8) is inserted into the recess of the baffle (7) and connected with the second connecting part (72) through the second bolt (10).

4. The connection structure of a cloth truss according to claim 3, wherein The second connecting part (72) and the end of the pin shaft (8) are provided with a gasket (11), the second bolt (10) is connected with the pin shaft (8) after penetrating through the second connecting part (72) and the gasket (11), and the gasket (11) is attached to the inner side of the second connecting part (72).

5. The connection structure of a cloth truss according to claim 1, wherein The pin shaft (8) is sequentially penetrated through the baffle (7), the base (6), the rack (5) and the connecting piece (31) from right to left, the two ends of the pin shaft (8) are coaxially provided with pin shaft protruding parts (81), the diameter of the pin shaft protruding part (81) is smaller than the diameter of the pin shaft (8), the end faces of the two ends of the pin shaft (8) are pin shaft connecting parts (82), and two bolt holes five are provided on the pin shaft connecting part (82).

6. The connection structure of a cloth truss according to claim 5, wherein A circular hole is provided on the baffle (7), the diameter of the circular hole on the baffle (7) is larger than the diameter of the pin shaft protruding part (81) and smaller than the diameter of the pin shaft (8), the pin shaft protruding part (81) penetrates through the circular hole on the baffle (7), the inner side of the baffle (7) is attached to the pin shaft connecting part (82) and the surface of the base (6).

7. The connection structure of a cloth truss according to claim 5, wherein The baffle (7) comprises a baffle one (73) and a baffle two (74), three bolt holes two are provided on the baffle (7), one of which is provided on the baffle one (73), and the other two are provided on the baffle two (74), after the baffle one (73) and the baffle two (74) are connected, the three bolt holes two are arranged in an equilateral triangle, and the overall structure of the baffle one (73) and the baffle two (74) is a semicircular ring.

8. The connection structure of a cloth truss according to claim 7, wherein The baffle one (73) and the baffle two (74) are connected with the base (6) through the first bolt (9), two ends of the baffle one (73) are respectively provided with the third connecting part (75), the third connecting part (75) extends from the top surface to the bottom surface of the baffle one (73), the thickness of the third connecting part (75) is not greater than the thickness of the baffle one (73), two ends of the baffle two (74) are respectively provided with the fourth connecting part (76), the fourth connecting part (76) extends from the bottom surface to the top surface of the baffle two (74), the thickness of the fourth connecting part (76) is not greater than the thickness of the baffle two (74), the third connecting part (75) and the fourth connecting part (76) are spliced, a bolt hole six is formed in the third connecting part (75), a bolt hole seven is formed in the fourth connecting part (76), the bolt hole five, the bolt hole six and the bolt hole seven are correspondingly arranged, and the second bolt (10) is connected with the pin shaft connecting part (82) through the third connecting part (75) and the fourth connecting part (76).

9. The fabric truss connection of claim 1, wherein, The base (6) and the baffle (7) are circular in cross section, the baffle (7) is coaxial with the base (6), and the diameter of the baffle (7) is not greater than that of the base (6).

10. The connection structure of a cloth truss according to any one of claims 1 to 9, characterized in that, The baffle (7) is made of alloy steel, and the surface of the baffle (7) is coated with a corrosion-resistant and wear-resistant coating; the first bolt (9) and the second bolt (10) are both M8 bolts, the M8 bolts are made of carbon structural steel, and the tensile strength grade of the M8 bolts is not less than 10.9.

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