Electric cantilever crane

Abstract

The utility model relates to the field of cantilever cranes, and particularly discloses an electric cantilever crane which comprises a cantilever, a swing seat mounted at one end of the cantilever, a rotating base arranged below the swing seat, rotating teeth mounted on the outer side of the lower end of the swing seat, and a second ratchet ring arranged below the rotating teeth. A first ratchet ring is mounted on the outer side of the swing seat between the second ratchet ring and the rotating teeth, a first brake mechanism is mounted on one side of the second ratchet ring and located in the rotating base, a second brake mechanism is mounted on one side of the first ratchet ring and located in the rotating base, and the first brake mechanism comprises a pawl, a winding roller and a brake motor. And an elastic rotating shaft is connected between the pawl and the rotating base. The tooth punching directions of the first ratchet ring and the second ratchet ring are opposite, the first ratchet ring and the second ratchet ring are matched with the action of the first brake mechanism and the second brake mechanism, so that no influence is generated during normal swinging, and when braking is needed, the purpose of quick braking can be achieved under the action of the overall brake and the pawl of the device.

Description

Technical Field

[0001] The utility model relates to the field of cantilever cranes, in particular to an electric cantilever crane. Background Art

[0002] The working intensity of the cantilever crane is light. The crane consists of a column, a slewing arm rotation drive device and an electric hoist. The lower end of the column is fixed to the concrete foundation by anchor bolts. The cantilever rotation is driven by a cycloidal pinwheel reduction device. The electric hoist runs in a straight line left and right on the cantilever I-beam and lifts heavy objects.

[0003] However, since the brakes of the cantilever crane are more or less directly braked with brake pads during the lifting and swinging, when braking after lifting a heavy object, it is easy to cause a long braking time due to the effect of inertia. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides an electric cantilever crane to solve the problems mentioned in the above background.

[0005] The utility model provides the following technical solution: an electric cantilever crane comprises a cantilever, a swing seat is installed at one end of the cantilever, a rotating base is arranged below the swing seat, a rotating tooth is installed on the outer side of the lower end of the swing seat, a second ratchet ring is arranged below the rotating tooth, a first ratchet ring is installed on the outer side of the swing seat between the second ratchet ring and the rotating tooth, a first brake mechanism is installed on one side of the second ratchet ring located inside the rotating base, a second brake mechanism is installed on one side of the first ratchet ring located inside the rotating base, the first brake mechanism comprises: a ratchet, a winding roller, and a brake motor, an elastic rotating shaft is connected between the ratchet and the rotating base, and a pull ring is installed on the outer side of the ratchet.

[0006] As a further solution of the utility model: a driving motor is installed on the outer side of the swing seat, and a driving gear is installed on the lower end of the driving motor located on the outer side of the rotating tooth.

[0007] As a further solution of the utility model: a supporting base is installed at the lower end of the rotating base, a sliding groove is opened on the outer side of the cantilever, an electric hoist is arranged below the cantilever, and a guide slider is installed at the upper end of the electric hoist inside the sliding groove.

[0008] As a further solution of the utility model: a winding cable is connected between the pull ring and the winding roller, and the ratchet pawl is meshed and clamped with the first ratchet ring.

[0009] As a further solution of the utility model: the rotating teeth, the first ratchet ring and the second ratchet ring are all fixedly connected to the swing seat, and the swing seat is movably connected to the rotating base.

[0010] As a further solution of the utility model: the driving gear is meshed and engaged with the rotating teeth.

[0011] As a further solution of the utility model: the electric hoist is slidably connected to the slide groove through the guide slider.

[0012] As a further solution of the utility model: the support base is fixedly connected to the rotating base.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The first ratchet ring and the second ratchet ring are arranged with opposite opening directions, and the first brake mechanism and the second brake mechanism can cooperate to have no influence during normal swinging, and can achieve the purpose of rapid braking when braking is needed under the action of the brake and ratchet of the whole device.

[0015] 2. Under the elastic reset force of the elastic rotating shaft, the pawl is reset to the position of the second ratchet ring as a whole. After the pawl is inserted into the tooth groove of the second ratchet ring, the purpose of rapid braking can be achieved. The ratchet clamping method can be used for rapid braking to prevent the cantilever from continuing to swing, which will cause the heavy object to swing under the action of inertia. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an electric cantilever crane;

[0017] Figure 2 It is a partial enlarged view of the swing seat in the electric cantilever crane;

[0018] Figure 3 It is an enlarged view of the brake mechanism in the electric jib crane;

[0019] Figure 4 It is a side view of the whole device in the electric cantilever crane;

[0020] Figure 5 It is a top view of the swing seat in the electric cantilever crane.

[0021] In the figure: 1, cantilever; 2, guide slider; 3, electric hoist; 4, swing seat; 5, drive motor; 6, support base; 101, slide groove; 401, rotating base; 402, rotating teeth; 403, first ratchet ring; 404, second ratchet ring; 405, first brake mechanism; 406, ratchet; 407, elastic shaft; 408, winding roller; 409, brake motor; 410, pull ring; 411, second brake mechanism; 501, drive gear. DETAILED DESCRIPTION

[0022] 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 in 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.

[0023] like Figure 1-5 As shown, this embodiment provides an electric cantilever crane, including a cantilever 1, a swing seat 4 is installed at one end of the cantilever 1, a rotating base 401 is arranged below the swing seat 4, the swing seat 4 is movably connected to the rotating base 401, a rotating tooth 402 is installed on the outer side of the lower end of the swing seat 4, a second ratchet ring 404 is arranged below the rotating tooth 402, a first ratchet ring 403 is installed on the outer side of the swing seat 4 between the second ratchet ring 404 and the rotating tooth 402, the rotating tooth 402, the first ratchet ring 403, and the second ratchet ring 404 are all fixedly connected to the swing seat 4, and the first ratchet ring 403 and the second ratchet ring 404 are movably connected to the rotating base 401. One side of the second ratchet ring 404 is located inside the rotating base 401 and a first brake mechanism 405 is installed thereon. One side of the first ratchet ring 403 is located inside the rotating base 401 and a second brake mechanism 411 is installed thereon. The first brake mechanism 405 includes: a pawl 406, a winding roller 408, and a brake motor 409. The pawl 406 is meshed and clamped with the first ratchet ring 403. An elastic rotating shaft 407 is connected between the pawl 406 and the rotating base 401. A pull ring 410 is installed on the outer side of the ratchet 406. A winding cable is connected between the pull ring 410 and the winding roller 408.

[0024] like Figure 2-5 As shown, in this embodiment, a driving motor 5 is installed on the outer side of the swing seat 4, and a driving gear 501 is installed on the lower end of the driving motor 5, which is located on the outer side of the rotating tooth 402. The driving gear 501 is meshed and engaged with the rotating tooth 402. A supporting base 6 is installed on the lower end of the rotating base 401, and the supporting base 6 is fixedly connected to the rotating base 401. A slide groove 101 is opened on the outer side of the cantilever 1, and an electric hoist 3 is arranged below the cantilever 1. The electric hoist 3 is slidably connected to the slide groove 101 through a guide slider 2, and the upper end of the electric hoist 3 is located inside the slide groove 101 and a guide slider 2 is installed.

[0025] The working principle of the utility model is as follows: when in use, when the supporting base 6 is installed as a whole in the lifting position, the distance between the electric hoist 3 and the lifting object can be controlled by driving the guide slider 2 as a whole to slide back and forth in the slide groove 101 inside the cantilever 1, and the object can be lifted by winding up the electric hoist 3 as a whole, and then the driving motor 5 as a whole drives the driving gear 501 to rotate to mesh and rotate with the rotating teeth 402 on the outer side of the swing seat 4, so as to control the swing seat 4 to swing left and right above the rotating base 401 as a whole. When the cantilever 1 is swung to one side as a whole and braking is required, the brake pad is activated to brake and decelerate, and then the control The brake motor 409 in the first brake mechanism 405 is operated to release the force on the winding roller 408. The cable wound on the outside of the winding roller 408 releases the pulling force on the outside of the pull ring 410. Under the elastic reset force of the elastic shaft 407, the pawl 406 is reset to the position of the second ratchet ring 404 as a whole. After the pawl 406 is inserted into the tooth groove of the second ratchet ring 404, the purpose of rapid braking can be achieved. When the cantilever 1 is swung to the other side as a whole and braking is required, the ratchet inside the second brake mechanism 411 is driven to rotate to engage with the tooth groove inside the first ratchet ring 403 to achieve the purpose of rapid braking.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric cantilever crane, comprising a cantilever (1), characterized in that: A swing seat (4) is installed at one end of the cantilever (1), a rotating base (401) is arranged below the swing seat (4), a rotating tooth (402) is installed on the outer side of the lower end of the swing seat (4), a second ratchet ring (404) is arranged below the rotating tooth (402), a first ratchet ring (403) is installed on the outer side of the swing seat (4) between the second ratchet ring (404) and the rotating tooth (402), and one side of the second ratchet ring (404) is located on the rotating base A first brake mechanism (405) is installed inside (401), and a second brake mechanism (411) is installed inside the rotating base (401) on one side of the first ratchet ring (403). The first brake mechanism (405) includes: a pawl (406), a winding roller (408), and a brake motor (409). An elastic rotating shaft (407) is connected between the pawl (406) and the rotating base (401), and a pull ring (410) is installed on the outer side of the pawl (406).

2. The electric cantilever crane according to claim 1, characterized in that: A driving motor (5) is installed on the outer side of the swing seat (4), and a driving gear (501) is installed on the lower end of the driving motor (5) located on the outer side of the rotating tooth (402).

3. The electric jib crane according to claim 1, characterized in that: A support base (6) is installed at the lower end of the rotating base (401), a slide groove (101) is opened on the outer side of the cantilever (1), an electric hoist (3) is arranged below the cantilever (1), and a guide slider (2) is installed at the upper end of the electric hoist (3) inside the slide groove (101).

4. The electric jib crane according to claim 1, characterized in that: A winding cable is connected between the pull ring (410) and the winding roller (408), and the ratchet pawl (406) is meshed and clamped with the first ratchet ring (403).

5. The electric jib crane according to claim 1, characterized in that: The rotating teeth (402), the first ratchet ring (403), and the second ratchet ring (404) are all fixedly connected to the swing seat (4), and the swing seat (4) is movably connected to the rotating base (401).

6. The electric jib crane according to claim 2, characterized in that: The driving gear (501) is meshed and engaged with the rotating gear (402).

7. The electric jib crane according to claim 3, characterized in that: The electric hoist (3) is slidably connected to the slide groove (101) via the guide slider (2).

8. The electric jib crane according to claim 3, characterized in that: The supporting base (6) is fixedly connected to the rotating base (401).

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