Tower crane

Abstract

The utility model belongs to the technical field of hoisting equipment and provides a tower crane which comprises a tower arm mechanism and an oil cylinder locking mechanism, the oil cylinder locking mechanism comprises an outer locking rod piece and an inner locking rod piece, a hollow channel is arranged in the outer locking rod piece and extends in the rod length direction of the outer locking rod piece, and the inner locking rod piece is arranged in the hollow channel. The end, facing the inner lock rod piece, of the outer lock rod piece is provided with an opening communicated with the hollow channel, the end, facing the outer lock rod piece, of the inner lock rod piece penetrates through the opening and is movably arranged in the hollow channel in a penetrating mode, and the hollow channel can partially or completely contain the inner lock rod piece. A plurality of locking holes which are arranged at intervals in the rod length direction and penetrate through the hollow channel are formed in the outer side wall of the outer locking rod piece, and locking structures used for being connected with the locking holes in an aligned mode are arranged on the inner locking rod piece. The oil cylinder locking mechanism is high in structural strength, and the bearing capacity of the inner locking rod piece is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of lifting equipment, and in particular relates to a tower crane. Background Art

[0002] The amplitude change between the balance arm and the boom root section of some existing tower cranes is driven by a cylinder. After the boom root section is adjusted to a specified angle, a cylinder locking mechanism is required to support it to avoid the cylinder being continuously stressed and affecting its life.

[0003] Patent No. CN217516572U discloses a locking device between a balancing arm and an arm root section. When the locking device was installed on an actual product and a performance test was performed, the operator found that since the locking device set the through hole on the inner tube body, and the channel of the outer tube body limited the size of the inner tube body, the strength of the inner tube body was insufficient in some lifting scenarios. At the same time, since the locking slot was set at the top of the outer tube body, the operator needed to climb to the top of the outer tube body each time to lock it, which made the operation very troublesome. Utility Model Content

[0004] In view of the above-mentioned defects or shortcomings, the utility model provides a tower crane, aiming to solve the technical problems that the existing oil cylinder locking mechanism between the balance arm and the arm root section has low supporting strength and is cumbersome to use.

[0005] To achieve the above-mentioned purpose, the utility model provides a tower crane, wherein the tower crane comprises a tower arm mechanism and a cylinder locking mechanism, the tower arm mechanism comprises a balancing arm, a boom root section hinged on the balancing arm, and a variable-length oil cylinder arranged between the balancing arm and the boom root section, the cylinder locking mechanism comprises an outer locking rod hingedly arranged on one of the balancing arm and the boom root section and an inner locking rod hingedly arranged on the other, a hollow channel is arranged in the outer locking rod, the hollow channel extends along the rod length direction of the outer locking rod, an opening communicating with the hollow channel is arranged at one end of the outer locking rod facing the inner locking rod, the inner locking rod penetrates from the opening towards one end of the outer locking rod and is movably penetrated in the hollow channel, the hollow channel can partially or completely accommodate the inner locking rod, wherein a plurality of locking holes arranged at intervals along the rod length direction and penetrating the hollow channel are provided on the outer side wall of the outer locking rod, and a locking structure for aligning and connecting with the locking holes is provided on the inner locking rod.

[0006] In an embodiment of the utility model, the locking structure is a locking portion arranged at the end of one end of the inner locking rod facing the outer locking rod, and a locking groove is provided on the locking portion. The groove length direction of the locking groove is perpendicular to the rod length direction. The locking groove penetrates the locking portion along the groove length direction and can be selectively aligned with one of the locking holes. The cylinder locking mechanism also includes a locking member, which is used to connect the aligned locking groove and the locking hole.

[0007] In an embodiment of the utility model, an auxiliary lock hole is further provided on the inner lock rod, and the auxiliary lock hole is used to be connected in alignment with the locking hole, and the locking member can also penetrate the aligned auxiliary lock hole and the locking hole.

[0008] In an embodiment of the present invention, the locking member is a pin.

[0009] In an embodiment of the utility model, a pin holder is further provided on the outer locking rod, and the pin holder is used to place a pin.

[0010] In an embodiment of the utility model, a first hinged mounting portion is provided at the other end of the inner locking rod, and a first hinged mounting portion is provided on the first hinged mounting portion for hinged connection with the arm root section.

[0011] In an embodiment of the present utility model, the first hinged mounting portion is an ear plate structure.

[0012] In an embodiment of the utility model, a second hinged mounting portion is provided at one end of the outer locking rod away from the opening, and a second hinged mounting portion is provided on the second hinged mounting portion for hinged connection with the balance arm.

[0013] In an embodiment of the present invention, the second hinged mounting portion is an ear plate structure.

[0014] In an embodiment of the present invention, a climbing staircase is further provided on the outer side wall of the outer locking rod.

[0015] Through the above technical solution, the tower crane provided by the embodiment of the utility model has the following beneficial effects:

[0016] The oil cylinder locking mechanism in the utility model can avoid the reduction of the strength of the inner locking rod due to the opening of the hole in the inner locking rod by setting the locking hole on the outer locking rod. At the same time, since the spatial size of the outer locking rod is not limited, the size of the outer locking rod can be increased to compensate for the reduction of the structural strength caused by the opening of the outer locking rod, thereby ensuring the support strength of the outer locking rod. Furthermore, by hingedly connecting the outer locking rod to the balance arm and the inner locking rod to the arm root section, when the arm root section amplitude change angle is small, the position of the locking structure is close to the end of the balance arm hinged to the outer locking rod. At this time, the operator can realize the locking operation of the locking structure and the locking hole by standing on the walkway of the balance arm, avoiding the need for personnel to climb to the height of the outer locking rod, which is convenient for personnel to operate.

[0017] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide an understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the accompanying drawings:

[0019] Figure 1 It is a partial structural schematic diagram of a tower crane according to an embodiment of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the oil cylinder locking mechanism in the embodiment of the utility model;

[0021] Figure 3 It is a schematic structural diagram of the inner locking rod in the embodiment of the utility model.

[0022] Description of Reference Numerals

[0023] 11 Balance arm 12 Arm root section

[0024] 13 Luffing cylinder 2 Cylinder locking mechanism

[0025] 21 external locking rod 211 locking hole

[0026] 212 pin bracket 213 second hinged mounting portion

[0027] 213a Second hinge hole 214 Climbing stairs

[0028] 22 inner locking rod 221 locking portion

[0029] 222 locking groove 223 first hinge mounting portion

[0030] 223a First hinge hole 224 Auxiliary locking hole DETAILED DESCRIPTION

[0031] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0032] The tower crane of the present invention will be described below with reference to the accompanying drawings.

[0033] The utility model provides a tower crane, such as Figure 1 and Figure 2 As shown, the tower crane includes:

[0034] The tower arm mechanism comprises a balancing arm 11, an arm root section 12 hinged to the balancing arm 11, and a luffing cylinder 13 arranged between the balancing arm 11 and the arm root section 12;

[0035] The oil cylinder locking mechanism 2 comprises an outer locking rod 21 hingedly arranged on one of the balance arm 11 and the arm root section 12 and an inner locking rod 22 hingedly arranged on the other one. A hollow passage is arranged in the outer locking rod 21, and the hollow passage extends along the rod length direction of the outer locking rod 21. An opening communicating with the hollow passage is arranged at one end of the outer locking rod 21 facing the inner locking rod 22. An end of the inner locking rod 22 facing the outer locking rod 21 passes through the opening and is movably arranged in the hollow passage. The hollow passage can partially or completely accommodate the inner locking rod 22.

[0036] Among them, the outer side wall of the outer locking rod 21 is provided with a plurality of locking holes 211 arranged at intervals along the length direction of the rod. The plurality of locking holes 211 are respectively connected to the hollow channels and horizontally penetrate the outer locking rod 21. The inner locking rod 22 is provided with a locking structure for aligning and connecting with the locking holes 211.

[0037] In the embodiment of the present utility model, the outer locking rod 21 is preferably hinged on the balance arm 11 , and the inner locking rod 22 is preferably hinged on the arm root section 12 .

[0038] The tower crane in the utility model can avoid the reduction of the strength of the inner locking rod 22 caused by opening a hole in the inner locking rod 22 by setting the locking hole 211 on the outer locking rod 21. At the same time, since the spatial size of the outer locking rod 21 is not limited, the size of the outer locking rod 21 can be increased to compensate for the reduction of the structural strength caused by the opening of the outer locking rod 21, thereby ensuring the support strength of the outer locking rod 21. Furthermore, by hingedly connecting the outer locking rod 21 to the balance arm 11 and the inner locking rod 22 to the boom root section 12, when the amplitude change angle of the boom root section 12 is small, the position of the locking structure is close to the end of the balance arm 11 hinged by the outer locking rod 21. At this time, the operator can realize the locking operation of the locking structure and the locking hole 211 by standing on the walkway of the balance arm 11, avoiding the need for the operator to climb to the height of the outer locking rod 21, which is convenient for the operator to operate.

[0039] like Figure 1 , Figure 2 and Figure 3As shown, in an embodiment of the utility model, the locking structure can be a locking portion 221 arranged at the end of the inner locking rod 22 facing one end of the outer locking rod 21, and a locking groove 222 is provided on the locking portion 221, and the groove length direction of the locking groove 222 is perpendicular to the rod length direction, wherein the rod length direction is the same as the extension direction of the inner locking rod 22 in the hollow channel, and the locking groove 222 penetrates the locking portion 221 along the groove length direction and can be selectively aligned with one of the locking holes 211, and the cylinder locking mechanism 2 also includes a locking member, which is used to connect the aligned locking groove 222 and the locking hole 211. The groove length direction of the locking groove 222 can be the same as the horizontal direction of the outer locking rod 21. The alignment of the locking groove 222 and the locking hole 211 means that in the horizontal direction, the locking groove 222 and the locking hole 211 are aligned. The locking member passes through the aligned locking groove 222 and the locking hole 211, and the inner locking rod 22 can be locked in the direction of extending into the hollow channel to prevent the inner locking rod 22 from further extending into the hollow channel. At the same time, in order to reduce the weight of the inner locking rod 22, the inner locking rod 22 is preferably set as a hollow tubular rod frame. In order to prevent the end of the inner locking rod 22 of the tubular rod frame from being squeezed and deformed when being locked, the locking portion 221 can preferably be set as a solid block structure.

[0040] like Figure 2 and Figure 3 As shown, in an embodiment of the present invention, the locking groove 222 is arranged at the end of the inner locking rod 22, so that when the amplitude variation angle of the arm root section 12 is small, the locking groove 222 is positioned closer to one end of the outer locking rod 21 hinged to the balance arm 11.

[0041] In the embodiment of the present utility model, a through hole may be used instead of the locking groove 222 to achieve the same locking effect.

[0042] like Figure 2 and Figure 3 As shown, in the embodiment of the utility model, an auxiliary locking hole 224 can also be provided on the inner locking rod 22. The auxiliary locking hole 224 is used when the locking groove 222 is aligned with one of the locking holes 211, or aligned with one of the locking holes 211 during tower crane transportation. The locking member can also penetrate the aligned auxiliary locking hole 224 and the locking hole 211. By providing the auxiliary locking hole 224, the original fixing method of a single locking member penetrating and locking can be changed to a fixing method of at least two groups of locking members penetrating and locking between the outer locking rod 21 and the inner locking rod 22. Multiple locking positions can increase the locking stability between the outer locking rod 21 and the inner locking rod 22. At the same time, since the locking groove 222 can only limit the displacement of the inner locking rod 22 in one direction, by providing the auxiliary locking hole 224, the inner locking rod 22 can be prevented from sliding out of the opening of the hollow channel during tower crane transportation.

[0043] In the embodiment of the present invention, there may be multiple locking members, and the locking members may be pins, locking rods, and the like.

[0044] like Figure 2 and Figure 3 As shown, in the embodiment of the utility model, the other end of the inner locking rod 22 is provided with a first hinged mounting portion 223, and the first hinged mounting portion 223 is provided with a first hinged hole 223a for hinged connection with the arm root section 12. By providing the first hinged mounting portion 223, hinged connection with the arm root section 12 is facilitated.

[0045] In the embodiment of the present invention, the first hinged mounting portion 223 is an ear plate structure, and is preferably a double ear plate.

[0046] In the embodiment of the present utility model, the locking portion 221 and the first hinged mounting portion 223 can be mounted on both ends of the inner locking rod 22 by welding.

[0047] like Figure 2 As shown, in the embodiment of the utility model, the outer locking rod 21 may also be provided with a pin frame 212, and the pin frame 212 is used to place the pin. Specifically, the pin frame 212 includes two clamping plates arranged in parallel with each other, and the two clamping plates are provided with a plurality of pin clamping hole groups arranged in an aligned manner, and the pin can pass through the pin clamping hole groups to achieve the placement of the pin.

[0048] like Figure 2 As shown, in the embodiment of the utility model, a second hinged mounting portion 213 is provided at one end of the outer locking rod 21 away from the opening, and a second hinged mounting portion 213a is provided on the second hinged mounting portion 213 for hinged connection with the balance arm 11. The outer locking rod 21 may also be a hollow tubular rod frame, that is, the hollow channel may completely penetrate the outer locking rod 21, and the second hinged mounting portion 213 is used to block the end of the outer locking rod 21. By providing the second hinged mounting portion 213 at the end of the outer locking rod 21, it is convenient to hinge with the balance arm 11.

[0049] In the embodiment of the present invention, the second hinged mounting portion 213 is an ear plate structure, and is preferably a double ear plate.

[0050] like Figure 1 As shown, in the embodiment of the utility model, the outer wall of the outer locking rod 21 is also provided with a climbing staircase 214. By providing the climbing staircase 214, when the locking groove 222 and the locking hole 211 are aligned at a higher position, it is convenient for personnel to climb to a high position of the outer locking rod 21 to operate.

[0051] like Figure 1As shown, in an embodiment of the utility model, a walking passage is provided inside the balancing arm 11, and a walkway is provided at the bottom of the walking passage, which extends to the vicinity of the climbing stairs 214. People can reach the vicinity of the climbing stairs 214 through the walkway to adjust the cylinder locking mechanism 2.

[0052] In summary, the cylinder locking mechanism 2 in the utility model has a high structural strength, and when the arm root section 12 has a small amplitude variation angle, a person can perform the locking operation of the cylinder locking mechanism 2 by simply standing on the walkway of the balance arm 11. Therefore, in some usage scenarios, the technical problem of the cumbersome operation of the cylinder locking mechanism 2 can be solved.

[0053] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0056] Although the embodiments of the present invention have been described above, it is understandable that the above embodiments are exemplary and cannot be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A tower crane, characterized in that: The tower crane comprises: The tower arm mechanism comprises a balancing arm (11), an arm root section (12) hinged to the balancing arm (11), and a luffing oil cylinder (13) arranged between the balancing arm (11) and the arm root section (12); The oil cylinder locking mechanism (2) comprises an outer locking rod (21) hingedly arranged on one of the balancing arm (11) and the arm root section (12) and an inner locking rod (22) hingedly arranged on the other of the balancing arm (11) and the arm root section (12), wherein a hollow passage is arranged in the outer locking rod (21), and an opening communicating with the hollow passage is arranged at one end of the outer locking rod (21) facing the inner locking rod (22), and an end of the inner locking rod (22) facing the outer locking rod (21) penetrates from the opening and is movably arranged in the hollow passage; Wherein, a plurality of locking holes (211) are provided on the outer side wall of the outer locking rod (21) and are arranged at intervals along the length direction of the rod and penetrate the hollow channel, and a locking structure for aligning and connecting with the locking holes (211) is provided on the inner locking rod (22).

2. The tower crane according to claim 1, characterized in that: The locking structure is a locking portion (221) arranged at the end of the inner locking rod (22) facing the outer locking rod (21); a locking groove (222) is provided on the locking portion (221); the groove length direction of the locking groove (222) is perpendicular to the rod length direction; the locking groove (222) penetrates the locking portion (221) along the groove length direction and can be selectively aligned with one of the locking holes (211); the cylinder locking mechanism (2) also includes a locking member, which is used to penetrate the aligned locking groove (222) and the locking hole (211).

3. The tower crane according to claim 2, characterized in that: The inner locking rod (22) is also provided with an auxiliary locking hole (224), and the auxiliary locking hole (224) is used to be connected in alignment with the locking hole (211), and the locking member can also penetrate the aligned auxiliary locking hole (224) and the locking hole (211).

4. The tower crane according to claim 3, characterized in that: The locking member is a pin.

5. The tower crane according to claim 4, characterized in that: The outer locking rod (21) is also provided with a pin shaft frame (212), and the pin shaft frame (212) is used to place the pin shaft.

6. The tower crane according to claim 2, characterized in that: The other end of the inner locking rod (22) is provided with a first hinged mounting portion (223), and the first hinged mounting portion (223) is provided with a first hinged hole (223a) for hinged connection with the arm root section (12).

7. The tower crane according to claim 6, characterized in that: The first hinged mounting portion (223) is an ear plate structure.

8. The tower crane according to any one of claims 1 to 7, characterized in that: A second hinged mounting portion (213) is provided at one end of the outer locking rod (21) away from the opening, and a second hinged mounting portion (213) is provided on the second hinged mounting portion (213) for hinged connection with the balance arm (11).

9. The tower crane according to claim 8, characterized in that: The second hinged mounting portion (213) is an ear plate structure.

10. The tower crane according to any one of claims 1 to 7, characterized in that: The outer side wall of the outer locking rod (21) is also provided with a climbing staircase (214).

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