Tower arm anti-back-tilting device and crane

Abstract

The invention belongs to the field of engineering machinery, and particularly relates to a tower arm anti-back-tilting device and a crane. The invention comprises: a tower cap; the tower arm is hinged with the tower cap; the front mast is hinged to the tower arm, a limiting sliding groove is formed in the front mast, and the limiting sliding groove is formed in the length direction of the first mast; the supporting beam is hinged to the tower cap, and the angle between the supporting beam and the tower cap is limited through a limiting structure; and one end of the anti-back-tilting telescopic cylinder is hinged to one end, far away from the tower cap, of the supporting beam, and the other end of the anti-back-tilting telescopic cylinder is clamped in the limiting sliding groove and slides along the limiting sliding groove. Through the arrangement of the supporting beam, the force arm of the anti-back-tipping telescopic cylinder is increased, the thrust needed by the anti-back-tipping telescopic cylinder is reduced, and therefore the weight and cost of the anti-back-tipping telescopic cylinder are reduced; in addition, the anti-backward-tilting telescopic cylinder is clamped in the limiting sliding groove so that it can be guaranteed that the anti-backward-tilting telescopic cylinder can be connected with the front mast all the time, and the safety and reliability of the tower arm are improved.

Description

Technical Field

[0001] This invention belongs to the field of engineering machinery, and particularly relates to a tower boom anti-tilting device and a crane. Background Technology

[0002] Tower booms are characterized by high lifting height, large working radius, and large lifting capacity, and are widely used both domestically and internationally. The anti-tilting device is an essential structural function of tower booms. Its function is to prevent the boom from tilting backward due to excessive elevation angle during operation. The reliability of the anti-tilting structure directly affects the safety of the entire lifting operation.

[0003] Currently, the commonly used technical solution for anti-rollover devices is the "anti-rollover cylinder + guide rail" form, such as... Figure 1 As shown, the anti-tilt device 6 includes an anti-tilt cylinder 61 and a guide rail 62. The anti-tilt cylinder 61 is hinged to the tower cap 1 on the tower arm support, and the guide rail 62 is fixed to the front mast 3. During the lifting process, the tower arm 2 rotates counterclockwise by the retraction of the winch, which drives the pull plate, the front mast 3, the rear mast 4, and the auxiliary mast 5. Figure 1 In the initial state, the anti-rollover cylinder 61 is disengaged from the guide rail 62; as the boom continues to rise, the end of the anti-rollover cylinder 61 will enter the guide rail 62. When the boom reaches the desired height... Figure 2 In the specified state, the anti-rollover cylinder 61 slides along the guide rail to the support point of the front mast 3, generating thrust on the boom to prevent it from tilting backward. (See dimension L). Figure 2 This type of anti-tilting cylinder has a lever arm. During the boom raising process, the anti-tilting cylinder may detach from the guide rail. It only slides back to the corresponding support position via the guide rail after the boom has reached a certain elevation angle. The anti-tilting cylinder is susceptible to damage from factors such as inflation pressure, ambient temperature, and the manufacturing precision of the guide rail. This can lead to the cylinder failing to slide smoothly back into the guide rail during boom raising, potentially causing safety accidents during operation. Furthermore, this structural design results in a small lever arm for the anti-tilting cylinder, requiring a large thrust, leading to a heavy and costly anti-tilting cylinder.

[0004] Patent CN105600692A discloses a boom anti-tilting structure. One end of the anti-tilting cylinder is hinged to the boom support, and the other end is hinged to one end of the swing support, which in turn is hinged to the front mast. A fixing groove is provided on the front mast. When the end of the anti-tilting cylinder rotates to the fixing groove position on the front mast, the end of the anti-tilting cylinder contacts and is limited by the fixing groove, thus preventing tilting. Although this solves the safety and reliability problem of the boom, the anti-tilting cylinder still has a small lever arm, requiring a large thrust and cylinder diameter, resulting in a heavy and costly anti-tilting cylinder. Summary of the Invention

[0005] To address the aforementioned problems in the existing technology, the present invention provides a tower boom anti-tilting device and a crane, which can increase the lever arm of the anti-tilting telescopic cylinder and reduce the thrust required by the anti-tilting telescopic cylinder, thereby reducing the weight and cost of the anti-tilting telescopic cylinder.

[0006] To achieve the above objectives, the technical solution provided by the present invention is as follows:

[0007] In a first aspect, the present invention provides a tower arm anti-tilting device, comprising:

[0008] Tower cap;

[0009] The tower arm is hinged to the tower cap.

[0010] The front mast is hinged to the tower arm and has a limiting slide groove, which is arranged along the length of the first mast.

[0011] The supporting beam is hinged to the tower cap, and the angle between it and the tower cap is limited by a limiting structure.

[0012] The anti-tilting telescopic cylinder has one end hinged to the end of the support beam away from the tower cap, and the other end is engaged in the limiting slide groove and slides along the limiting slide groove.

[0013] Optionally, the anti-tilting telescopic cylinder is provided with a sliding pin, and the limiting grooves are symmetrically arranged on both sides of the sliding pin. Both ends of the sliding pin are inserted into the limiting grooves and slide along the limiting grooves.

[0014] Optionally, a slide body is provided on the front mast. The slide body includes longitudinal beams symmetrically arranged on both sides of the anti-tilt telescopic cylinder, and two limiting slide grooves are respectively arranged on the longitudinal beams on both sides. The longitudinal beams are connected to the front mast.

[0015] Optionally, the limiting structure includes a limiting base arranged on the tower cap, which is used to limit the support beam by abutting against the support beam when the support beam rotates to a certain angle toward the tower cap.

[0016] Optionally, the tower arm and the tower cap are hinged at a first hinge point; the support beam and the tower cap are hinged at a second hinge point, and the first hinge point and the second hinge point do not coincide.

[0017] Optionally, it also includes a rear mast and an auxiliary mast, both of which are hinged to the tower cap.

[0018] Optionally, the foremast is located between the tower arm and the aft mast, and the aft mast is located between the foremast and the auxiliary mast.

[0019] Secondly, the present invention also provides a crane including the tower boom anti-tilting device described in the first aspect.

[0020] Optionally, a main boom is provided thereon, and the tower cap is arranged on the main boom.

[0021] Compared with the prior art, the present invention has at least the following beneficial effects:

[0022] This invention adds a support beam between the tower cap and the anti-tilting telescopic cylinder. One end of the support beam is connected to the tower cap, and the other end is connected to the anti-tilting telescopic cylinder. When the tower arm rotates counterclockwise to abut against the limiting structure, the anti-tilting telescopic cylinder generates a thrust on the front mast, thus achieving the purpose of preventing the tower arm from tilting backward. By setting up the support beam, the lever arm of the anti-tilting telescopic cylinder is increased, and the thrust required by the anti-tilting telescopic cylinder is reduced, thereby reducing the weight and cost of the anti-tilting telescopic cylinder. Furthermore, the anti-tilting telescopic cylinder is secured in the limiting groove, ensuring that the anti-tilting telescopic cylinder is always connected to the front mast, improving the safety and reliability of the tower arm. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the anti-tilting cylinder in the existing technology when it is detached from the guide rail.

[0025] Figure 2 This is a schematic diagram of the working structure of an anti-tilt cylinder in the prior art;

[0026] Figure 3 This is a schematic diagram of the structure of a tower arm anti-tilting device according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram illustrating the limiting slide structure in an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram illustrating the structural relationship between the limiting base and the support beam in an embodiment of the present invention;

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Tower cap; 2. Tower arm; 3. Front mast; 31. Longitudinal beam; 32. Limiting slide groove; 4. Rear mast; 5. Auxiliary mast; 6. Anti-tilting device; 61. Anti-tilting cylinder; 62. Guide rail; 7. Tower cap; 8. Anti-tilting telescopic cylinder; 81. Sliding pin; 9. Support beam; 10. Limiting base. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0034] Example 1

[0035] like Figures 3-5 As shown, a tower boom anti-tilting device includes:

[0036] Tower cap 7;

[0037] Tower arm 2 is hinged to tower cap 7;

[0038] The front mast 3 is hinged to the tower arm 2, and a limiting slide groove 32 is provided on it. The limiting slide groove 32 is arranged along the length direction of the first mast.

[0039] Support beam 9 is hinged to tower cap 7, and the angle between it and tower cap 7 is limited by a limiting structure.

[0040] The anti-tilting telescopic cylinder 8 has one end hinged to the end of the support beam 9 away from the tower cap 7, and the other end is engaged in the limiting slide groove 32 and slides along the limiting slide groove 32.

[0041] The crane is equipped with a winch, and the winch's wire rope is wound around the front mast 3 and then connected to the tower arm 2. Wrapping the wire rope around the front mast 3 and then connecting it to the tower arm 2 can distribute the stress on the wire rope (similarly, a rear mast 4, auxiliary support rods 5, etc. can be added), and stabilize the position of the tower arm.

[0042] A support beam 9 is added between the tower cap 7 and the anti-tilting telescopic cylinder 8. One end of the support beam 9 is connected to the tower cap 7, and the other end is connected to the anti-tilting telescopic cylinder 8. When the tower arm 2 rotates counterclockwise to abut against the limiting structure, the anti-tilting telescopic cylinder 8 generates a thrust on the front mast 3, thereby achieving the purpose of preventing the tower arm 2 from tilting backward. By setting the support beam 9, the lever arm of the anti-tilting telescopic cylinder 8 is increased, and the thrust required by the anti-tilting telescopic cylinder 8 is reduced, thereby reducing the weight and cost of the anti-tilting telescopic cylinder 8. Furthermore, the anti-tilting telescopic cylinder 8 can be ensured to always be connected to the front mast 3 by being snapped into the limiting slide groove 32, which improves the safety and reliability of the tower arm 2.

[0043] Example 2

[0044] The difference between this embodiment and Embodiment 1 is that: Figure 4 As shown, the anti-tilt telescopic cylinder 8 is equipped with a sliding pin 81, and limiting grooves 32 are symmetrically arranged on both sides of the sliding pin 81. Both ends of the sliding pin 81 are inserted into the limiting grooves 32 and slide along the limiting grooves 32. Specifically, in this embodiment, the front mast 3 is equipped with a slide rail body, which includes longitudinal beams 31 symmetrically arranged on both sides of the anti-tilt telescopic cylinder 8. Two limiting grooves 32 are respectively arranged on the longitudinal beams 31 on both sides, and the longitudinal beams 31 are connected to the front mast 3. Through the arrangement of the limiting grooves 32 on the longitudinal beams 31, the anti-tilt telescopic cylinder 8 can slide along the front mast 3, and can also avoid the anti-tilt telescopic cylinder 8 from separating from the front mast 3 after it comes off.

[0045] like Figure 5 As shown, the limiting structure includes a limiting base 10 arranged on the tower cap 7. The limiting base 10 is used to limit the support beam 9 by abutting against the support beam 9 when the support beam 9 rotates to a certain angle towards the tower cap 7, thereby supporting and limiting the support beam 9.

[0046] In this embodiment, the tower arm 2 and the tower cap 7 are hinged at the first hinge point; the support beam 9 and the tower cap 7 are hinged at the second hinge point, and the first hinge point and the second hinge point do not coincide.

[0047] The anti-tilting device 6 for the tower arm in this embodiment also includes a rear mast 4 and an auxiliary mast 5, both of which are hinged to the tower cap 7. Specifically, the front mast 3 is located between the tower arm 2 and the rear mast 4, and the rear mast 4 is located between the front mast 3 and the auxiliary mast 5.

[0048] This embodiment also provides a crane, including the aforementioned anti-tilting device 6 for the tower boom. In this embodiment, the crane is equipped with a main boom, and the tower cap 7 is connected to the main boom via a tower boom bracket.

[0049] During boom raising or operation, the connecting hinge points of the support beam 9, the tower cap 7, and the anti-tilting telescopic cylinder 8 rotate relative to each other. The anti-tilting telescopic cylinder 8 always slides within the limiting groove 32 of the slide body. The anti-tilting telescopic cylinder 8 remains connected to the front mast 3. When the front mast 3 luffs... Figure 5 In the current state, the support beam 9 contacts the limiting base 10 on the tower cap 7, restricting the counterclockwise rotation of the support beam 9. The anti-tilting telescopic cylinder 8 slides along the limiting slide groove 32 to the end of the limiting slide groove 32 to generate a thrust on the front mast 3, thereby preventing the tower arm 2 from tilting backward. Dimension L (see Figure 5 (This is to prevent the cylinder lever arm from tilting backward.)

[0050] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0051] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A tower arm anti-tilting device, characterized in that, include: Tower cap; The tower arm is hinged to the tower cap. The front mast is hinged to the tower arm and has a limiting slide groove, which is arranged along the length of the first mast. The supporting beam is hinged to the tower cap, and the angle between it and the tower cap is limited by a limiting structure. The anti-tilting telescopic cylinder has one end hinged to the end of the support beam away from the tower cap, and the other end is engaged in the limiting slide groove and slides along the limiting slide groove.

2. The tower arm anti-tilting device according to claim 1, characterized in that, The anti-tilting telescopic cylinder is equipped with a sliding pin, and the limiting grooves are symmetrically arranged on both sides of the sliding pin. Both ends of the sliding pin are inserted into the limiting grooves and slide along the limiting grooves.

3. The tower arm anti-tilting device according to claim 2, characterized in that, The foremast is equipped with a slide body, which includes longitudinal beams symmetrically arranged on both sides of the anti-tilt telescopic cylinder, and two limiting slide grooves arranged on the longitudinal beams on both sides. The longitudinal beams are connected to the foremast.

4. The tower arm anti-tilting device according to claim 1, characterized in that, The limiting structure includes a limiting base arranged on the tower cap. The limiting base is used to limit the support beam by abutting against the support beam when the support beam rotates to a certain angle toward the tower cap.

5. The tower arm anti-tilting device according to claim 1, characterized in that, The tower arm and the tower cap are hinged at the first hinge point; the support beam and the tower cap are hinged at the second hinge point, and the first hinge point and the second hinge point do not coincide.

6. The tower arm anti-tilting device according to claim 1, characterized in that, It also includes a rear mast and an auxiliary mast, both of which are hinged to the tower cap.

7. The tower arm anti-tilting device according to claim 6, characterized in that, The foremast is located between the tower arm and the aft mast, while the aft mast is located between the foremast and the auxiliary mast.

8. A crane, characterized in that, Includes the tower arm anti-tilting device as described in any one of claims 1-7.

9. The crane according to claim 8, characterized in that, The main boom is mounted on it, and the tower cap is arranged on the main boom.

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