Female joint for connecting standard knots of tower crane, standard knots and tower crane

Abstract

The utility model provides a female joint for connecting standard knots of a tower crane, the standard knots and the tower crane. The female joint is used for connecting a male joint and a main chord member. The female connector is cylindrical, a matching portion is arranged at one end of the female connector, a male connector matching face is arranged at the other end of the female connector, a through pin shaft hole is formed in the side face of the female connector, a male connector matching groove is further formed in the end provided with the male connector matching face, and the male connector matching face and the male connector matching groove are used for being connected with the male connector in a matched mode. And the outer diameter of the matching part is the same as the inner diameter of the main chord member. And sleeving the main chord member on the matching part, and then fixedly connecting the main chord member with the female joint by welding. The cylindrical matching part is connected with the hollow cylindrical main chord member, so that the stress concentration at the welding seam can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of tower cranes, in particular to a female joint for connecting standard sections of tower cranes, a standard section and a tower crane. Background Art

[0002] Tower cranes are referred to as tower cranes. They are usually used in the construction field. The tower body of a tower crane is usually composed of multiple standard sections stacked in sequence. Two adjacent standard sections are connected by pins or bolts through male and female joints. The tower standard section requires that the main chord strength is sufficient to support the upper tower body, especially the main chord pin connection or bolt connection strength is more important.

[0003] At present, when the main chords of the round tenon standard section are connected by a pin, the main chord is connected by opening a hole at the pin, which weakens the local strength at the pin hole. In the existing design scheme of the main chord of the tower body, in order to locally strengthen the pin hole of the main chord, a thick plate is usually added as a female joint and welded to the main body of the main chord. However, there is a sudden change in the cross section at the welding point where the female joint and the main chord are connected, resulting in a large stress concentration, which affects the fatigue life of the weld. Utility Model Content

[0004] In order to solve the problems existing in the above-mentioned prior art, the utility model provides a female joint for connecting the standard section of a tower crane, which is used to connect the male joint and the main chord. The female joint is cylindrical, with a matching portion at one end and a male joint matching surface at the other end. A through pin hole is provided on the side of the female joint, and a male joint matching groove is also provided at the end with the male joint matching surface. The male joint matching surface and the male joint matching groove are used to match and connect the male joint. The matching portion is cylindrical, and the outer diameter of the matching portion is the same as the inner diameter of the main chord.

[0005] The main chord is sleeved on the matching part, and then the main chord and the female joint are fixedly connected by welding. The main chord of the hollow cylinder is connected by the cylindrical matching part, which can effectively reduce the stress concentration at the weld.

[0006] Furthermore, the outer diameter of the female joint is not less than the outer diameter of the main chord, all points on the outer contour surface of the female joint body correspond to the outer contour construction line of the main chord, and the outer contour diameter of the female joint is consistent with or larger than the outer contour diameter of the main chord, which can effectively reduce stress concentration at the weld.

[0007] Furthermore, the male connector matching groove passes through the pin shaft hole to facilitate the connection of the male connector.

[0008] Furthermore, the mating portion and the female connector are coaxial, which facilitates processing.

[0009] Furthermore, a bearing portion is provided between the mating portion of the female joint and the bottom of the mating groove of the male joint, for bearing the pressure from the main chord and the male joint.

[0010] Furthermore, a welding slope is provided between the matching portion and the bearing portion to facilitate welding.

[0011] The utility model also provides a tower crane standard section, which uses the female joint as described above.

[0012] The utility model also provides a tower crane, which uses the female joint as mentioned above.

[0013] The female joint of the utility model is used for welding connection with a hollow circular tubular main chord. The outer contour line of the female joint is circular, and its outer diameter is not less than the outer diameter of the circular tube of the main chord. The outer diameter of the mating part of the female joint is matched with the inner diameter of the circular tubular welding base, which can effectively solve the problem of stress concentration at the existing joint weld and increase the fatigue life of the weld. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the female connector of the utility model;

[0016] Figure 2 It is a schematic diagram of the installation of the female connector of the utility model;

[0017] Figure 3 yes Figure 2 Schematic diagram of the middle AA section;

[0018] In the figure: 1. female joint; 2. mating part; 3. male joint mating surface; 4. pin shaft hole; 5. male joint mating groove; 6. male joint; 7. pin shaft; 8. main chord; 9. load-bearing part; 10. welding slope. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0020] See also Figure 1-3 This embodiment is a female connector. The female connector 1 is cylindrical as a whole, with a mating portion 2 at one end and a male connector mating surface 3 at the other end. A through pin hole 4 is provided on the side of the female connector 1. A male connector mating groove 5 is also provided at the end with the male connector mating surface 3. The male connector mating groove 5 is used to match the protrusion of the male connector 6. The male connector mating surface 3 is used to abut against the male connector 6 to play a certain supporting role. The pin hole 4 is used for positioning after the female connector 1 is installed with the male connector 6, and the pin 7 is passed through the pin hole 4.

[0021] The mating portion 2 is cylindrical, and the outer diameter of the mating portion 2 is the same as the inner diameter of the main chord 8. When in use, the main chord 8 is sleeved on the mating portion 2, and then the main chord 8 and the female connector 1 are fixedly connected by welding. Connecting the hollow cylindrical main chord 8 through the cylindrical mating portion 2 can effectively reduce stress concentration at the weld.

[0022] Preferably, the outer diameter of the female connector 1 is not less than the outer diameter of the main chord 8, all points on the outer contour surface of the main body of the female connector 1 correspond to the outer contour construction line of the main chord 8, and the outer contour diameter of the female connector 1 is consistent with or greater than the outer contour diameter of the main chord 8, which can effectively reduce the stress concentration at the weld. In this embodiment, the outer diameter of the female connector 1 is equal to the outer diameter of the main chord 8 as an example.

[0023] Preferably, in this embodiment, the male connector matching groove 5 passes through the pin shaft hole 4 to facilitate the connection of the male connector 6 .

[0024] Preferably, in this embodiment, the mating portion 2 and the female connector 1 are coaxial to facilitate processing.

[0025] In this embodiment, the female connector 1 is preferably provided with a bearing portion 9 between the mating portion 2 and the bottom of the male connector mating groove 5, for bearing the pressure from the main chord 8 and the male connector 6, and enhancing the overall strength. Further preferably, a welding slope 10 is provided between the mating portion 2 and the bearing portion 9, for facilitating welding. Example

[0026] This embodiment is a standard section of a tower crane, which uses the female joint in the above embodiment. Example

[0027] This embodiment is a tower crane, which uses the female joint in the above embodiment.

[0028] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A female joint for connecting a tower crane standard section, used to connect a male joint and a main chord, characterized in that: The female joint is cylindrical, with a mating portion provided at one end and a male joint mating surface provided at the other end. A through pin hole is provided on the side of the female joint, and a male joint mating groove is also provided on the end provided with the male joint mating surface. The male joint mating surface and the male joint mating groove are used for mating and connecting the male joint; the mating portion is cylindrical, and the outer diameter of the mating portion is the same as the inner diameter of the main chord.

2. The female joint for connecting the tower crane standard section according to claim 1 is characterized in that: The outer diameter of the female joint shall not be less than the outer diameter of the main chord.

3. The female joint for connecting the tower crane standard section according to claim 1, characterized in that: The male joint matching groove passes through the pin shaft hole.

4. The female joint for connecting the tower crane standard section according to claim 1, characterized in that: The mating portion and the female connector are coaxial.

5. The female joint for connecting the tower crane standard section according to claim 1, characterized in that: The female joint is provided with a bearing portion between the matching portion and the bottom of the matching groove of the male joint, which is used for bearing the pressure from the main chord and the male joint.

6. The female joint for connecting the tower crane standard section according to claim 5, characterized in that: A welding slope is provided between the matching portion and the bearing portion.

7. A tower crane standard section, characterized in that: It uses the female connector as described in any one of claims 1-6.

8. A tower crane, characterized in that: It uses the female connector as described in any one of claims 1-6.

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