Working bucket device for insulated boom truck

Abstract

A working bucket device for an insulated boom truck comprises an outer bucket (14) used as an outer packaging part, an inner bucket (11) used as a lining part, and an embracing ring part arranged between an opening part of the inner bucket (11) and an opening part of the outer bucket (14), composite wall layer type bucket body arrangement is achieved through the outer bucket (14) and the inner bucket (11), and the outer bucket (14) and the inner bucket (11) are combined through the embracing ring part. According to the working bucket, the inner bucket (11) and the outer bucket (14) are in lap joint, the lap joint opening parts of the outer bucket (14) and the inner bucket (11) are connected in an embedded mode, the thickness of the supporting wall body of the working bucket is increased, the technical problem that one insulating bucket body is used is solved, and therefore the supporting strength of the working bucket is improved.

Description

Technical Field

[0001] The utility model relates to a working bucket device, in particular to a working bucket device for an insulating bucket arm vehicle. Background Art

[0002] The insulated boom truck is a special vehicle that performs intermediate potential operations in places with convenient transportation and complex wiring. In order to meet the intermediate potential operation range of the upper device at high altitude, a working bucket is required to provide overhead support for the operator. Therefore, the working bucket device for the insulated boom truck is an important insulated boom truck component. In the existing working bucket device for the insulated boom truck, an insulating bucket body is used. Since the insulating bucket body needs to be made of insulating materials, the support strength of the working bucket is affected.

[0003] The utility model has the technical feature of increasing the thickness of the supporting wall of the working bucket, and has carried out effective exploration and research on the technical problem of using only one insulating bucket body at the technical level.

[0004] The statements here only provide background technology related to the utility model and do not necessarily constitute prior art. The technical solution of the application of the present invention is made based on the technical briefing document provided by the applicant on April 25, 2024, which solves actual technical problems in the work process, and the existing technical problems, technical features and technical effects in the similar patent literature and background technology obtained through retrieval. Summary of the invention

[0005] The object of the utility model is a working bucket device for an insulating bucket arm truck.

[0006] In order to overcome the above technical shortcomings, the purpose of the utility model is to provide a working bucket device for an insulated boom truck, thereby improving the supporting strength of the working bucket.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: it includes an outer bucket used as an outer packaging part, an inner bucket used as an inner lining part, and an embracing ring component arranged between the open part of the inner bucket and the open part of the outer bucket.

[0008] The technical effect of the above technical solution is: through, forming the basic technical solution of the utility model, solving the technical problem of the utility model.

[0009] Due to the design of the outer bucket, inner bucket and clamping ring components, a composite wall layer bucket body setting is realized through the outer bucket and the inner bucket, and the overlapping open parts of the outer bucket and the inner bucket are mosaic-connected through the clamping ring components, which increases the thickness of the supporting wall of the working bucket and solves the technical problem of using one insulating bucket body, thereby improving the supporting strength of the working bucket.

[0010] The utility model is designed to connect the outer bucket, the inner bucket and the embracing ring component to each other in a manner of increasing the thickness of the supporting wall of the working bucket.

[0011] The utility model is designed to connect the embracing ring component with the outer bucket and the inner bucket in a mosaic connection manner by overlapping the open parts.

[0012] The utility model is designed that the embracing ring component is arranged to include a flange and a ring platform.

[0013] The technical effects of the above four technical solutions are: highlighting the technical feature of increasing the thickness of the supporting wall of the working bucket, and introducing the application in the technical field of the working bucket device for the insulated boom truck.

[0014] The utility model is designed to further include a first accessory device, and the first accessory device is arranged on the inner bucket, and the first accessory device is arranged as a stepping platform.

[0015] The utility model is designed to further include a second accessory device, and the second accessory device is arranged on the outer bucket, and the second accessory device is arranged to be a connecting strip plate.

[0016] The technical effects of the above two technical solutions are: realizing the integrated installation of other components and expanding the technical effects of the utility model.

[0017] The utility model is designed that an inner bucket, a ring platform and a connecting strip plate are respectively arranged on an outer bucket, a flange is arranged between the ring platform and the inner bucket, and a step platform is arranged in the inner bucket.

[0018] The technical effect of the above technical solution is that the basic technical solution of the utility model is formed by the inner bucket, the step platform, the flange, the outer bucket, the ring platform and the connecting strips, which solves the technical problem of the utility model.

[0019] The utility model is designed that the outer bucket is arranged as a conical box-shaped body and the upper part of the peripheral side surface of the outer bucket is arranged to be connected with the ring platform, one part of the peripheral side surface of the outer bucket is arranged to be connected with the connecting strip plate and the outer bucket is arranged to be connected with the inner bucket in a accommodating manner, and the inner wall of the outer bucket is arranged to be connected with the inner bucket in a contact manner.

[0020] The utility model is designed that the inner bucket is set as a conical box-shaped body and one side portion of the bottom wall of the inner bucket and the lower portion of the side wall of the inner bucket are respectively set to be connected to the step and the upper portion of the peripheral side surface of the inner bucket is set to be connected to the flange, the inner bucket is set to be embeddedly connected to the outer bucket and the peripheral side surface of the inner bucket is set to be contact-type connected to the outer bucket.

[0021] The technical effects of the above two technical solutions are: realizing the setting of a conical bucket body and improving the supporting strength of the outer bucket and the inner bucket.

[0022] The utility model is designed that the ring platform is arranged as an annular body with a rectangular cross section, the inner end face portion of the ring platform is arranged to be connected with the outer bucket, the ring platform is arranged to be embeddedly connected with the flange, and the upper end face portion of the ring platform is arranged to be contact-connected with the flange.

[0023] The technical effect of the above technical solution is that: a bucket body with a thickened open portion is realized, thereby improving the supporting strength of the outer bucket.

[0024] The utility model is designed that the flange is arranged as an annular body with an L-shaped cross-section and the inner end surface portion of the flange is arranged to be connected with the inner bucket, the flange is arranged to be connected with the ring platform in an accommodating manner and the lower end surface portion of the horizontal portion of the flange is arranged to be connected with the ring platform in a contacting manner.

[0025] The technical effect of the above technical solution is that: a bucket body with an outwardly turned open portion is realized, thereby improving the supporting strength of the inner bucket.

[0026] The utility model is designed that the step platform is arranged as an L-shaped plate-shaped body, and the vertical end surface portion of the step platform and the horizontal end surface portion of the step platform are arranged to be connected with the inner bucket respectively.

[0027] The technical effect of the above technical solution is that it realizes the internal setting of the connector and improves the supporting strength of the inner bucket.

[0028] The utility model is designed that the connecting strip plate is arranged as a strip-shaped body with a through hole body, the inner end surface portion of the connecting strip plate is arranged to be connected with the outer bucket, and the connecting strip plate is arranged to be connected with the upper mounting device of the insulating bucket arm vehicle through bolts and nuts.

[0029] The technical effect of the above technical solution is: external connection of the strips is achieved and the connection area is increased.

[0030] The utility model is designed that the inner bucket and the outer bucket are arranged to be distributed in the manner of a ring-shaped edging connection with the flange and the ring platform, and the inner bucket, the outer bucket, the flange and the ring platform and the step are arranged to be distributed in the manner of a built-in reinforcement body, and the inner bucket, the outer bucket, the flange and the ring platform and the connecting strips are arranged to be distributed in the manner of an external connector.

[0031] The utility model is designed in which the center line of the inner bucket, the center line of the flange, the center line of the outer bucket and the center line of the ring platform are arranged on the same straight line, two connecting strips are arranged on one part of the peripheral side surfaces of the outer bucket, one side part of the bottom wall of the inner bucket is arranged to be connected to the vertical end surface portion of the platform, and the lower part of the side wall of the inner bucket is respectively arranged to be connected to the horizontal end surface portion of the platform.

[0032] In the present technical solution, the thickness of the supporting wall of the working bucket is increased by the outer bucket and the inner bucket.

[0033] In the present technical solution, the outer bucket, inner bucket and clamping ring components for increasing the thickness of the supporting wall of the working bucket are important technical features. In the technical field of the working bucket device for insulated boom trucks, it has novelty, creativity and practicality. The terms in the present technical solution can be explained and understood using the patent literature in this technical field. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] 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.

[0035] Figure 1 It is a schematic diagram of the utility model.

[0036] Figure 2 for Figure 1 Right view of

[0037] Inner bucket-11, step-12, flange-13, outer bucket-14, ring platform-15, connecting strip-16. DETAILED DESCRIPTION

[0038] According to the Examination Guidelines, terms such as “having”, “including” and “comprising” used in the present invention should be understood as not precluding the existence or addition of one or more other elements or combinations thereof.

[0039] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as they do not conflict with each other. In addition, unless otherwise specified, the equipment and materials used in the following embodiments are commercially available. If the processing conditions are not clearly stated, please refer to the purchased product manual or proceed according to conventional methods in the field.

[0042] 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.

[0043] Figure 1 This is the first embodiment of the utility model, which is specifically described in conjunction with the accompanying drawings. It includes an inner bucket 11, a step 12, a flange 13, an outer bucket 14, a ring platform 15 and a connecting strip 16, and the inner bucket 11, the ring platform 15 and the connecting strip 16 are respectively arranged on the outer bucket 14, a flange 13 is arranged between the ring platform 15 and the inner bucket 11, and a step 12 is arranged in the inner bucket 11.

[0044] In this embodiment, the outer bucket 14 is configured to be a conical box-shaped body and the upper portion of the peripheral side surface of the outer bucket 14 is configured to be connected to the ring platform 15, one portion of the peripheral side surface of the outer bucket 14 is configured to be connected to the connecting strip 16 and the outer bucket 14 is configured to be connected in an accommodating manner to the inner bucket 11, and the inner wall of the outer bucket 14 is configured to be connected in a contact manner.

[0045] Through the outer bucket 14, a supporting connection point for the inner bucket 11, the ring platform 15 and the connecting strips 16 is formed. The outer bucket 14 realizes connection with the inner bucket 11, the ring platform 15 and the connecting strips 16. Its technical purpose is to serve as a supporting carrier for the inner bucket 11, the ring platform 15 and the connecting strips 16.

[0046] In this embodiment, the inner bucket 11 is configured to be a conical box-shaped body and one side portion of the bottom wall of the inner bucket 11 and the lower portion of the side wall of the inner bucket 11 are respectively configured to be connected to the step 12 and the upper portion of the peripheral side surface of the inner bucket 11 is configured to be connected to the flange 13, the inner bucket 11 is configured to be embeddedly connected to the outer bucket 14 and the peripheral side surface portion of the inner bucket 11 is configured to be contact-connected to the outer bucket 14.

[0047] Through the inner bucket 11, supporting connection points for the step platform 12, the flange 13 and the outer bucket 14 are formed. The inner bucket 11 realizes connection with the step platform 12, the flange 13 and the outer bucket 14. Its technical purpose is to serve as a supporting carrier for the step platform 12 and the flange 13.

[0048] In this embodiment, the ring platform 15 is configured as an annular body with a rectangular cross-section and the inner end surface portion of the ring platform 15 is configured to be connected to the outer bucket 14, the ring platform 15 is configured to be embeddedly connected to the flange 13 and the upper end surface portion of the ring platform 15 is configured to be contact-connected to the flange 13.

[0049] A supporting connection point for the flange 13 and the outer bucket 14 is formed by the ring platform 15. The connection with the flange 13 and the outer bucket 14 is realized by the ring platform 15. Its technical purpose is to serve as one of the components for connecting the inner bucket 11 and the outer bucket 14.

[0050] In this embodiment, the flange 13 is configured as an annular body with an L-shaped cross-section and the inner end surface portion of the flange 13 is configured to be connected to the inner bucket 11, the flange 13 is configured to be accommodatingly connected to the ring platform 15 and the lower end surface portion of the transverse portion of the flange 13 is configured to be contactingly connected to the ring platform 15.

[0051] The flange 13 forms a supporting connection point for the inner bucket 11 and the ring platform 15. The flange 13 realizes the connection with the inner bucket 11 and the ring platform 15. Its technical purpose is to serve as the second component for connecting the inner bucket 11 and the outer bucket 14.

[0052] In the present embodiment, the step 12 is provided as an L-shaped plate-like body, and the vertical end surface portion of the step 12 and the horizontal end surface portion of the step 12 are respectively provided to be connected to the inner bucket 11 .

[0053] A supporting connection point for the inner bucket 11 is formed by the step 12 , and the connection with the inner bucket 11 is realized by the step 12 . Its technical purpose is to be used as a component for reinforcing the inner wall of the inner bucket 11 .

[0054] In this embodiment, the connecting strip 16 is configured as a strip-shaped body with a through hole and the inner end surface portion of the connecting strip 16 is configured to be connected to the outer bucket 14, and the connecting strip 16 is configured to be connected to the insulating bucket arm truck upper mounting device through bolts and nuts.

[0055] A supporting connection point for the outer bucket 14 is formed by connecting the strips 16, and the connection with the outer bucket 14 is realized by the connecting strips 16. The technical purpose is to be used as a component for connecting with the upper device of the insulated bucket arm truck.

[0056] In this embodiment, the inner bucket 11 and the outer bucket 14 are arranged to be distributed with the flange 13 and the ring platform 15 in a circular edging connection manner, and the inner bucket 11, the outer bucket 14, the flange 13 and the ring platform 15 and the step 12 are arranged to be distributed in the manner of an internal reinforcement body, the inner bucket 11, the outer bucket 14, the flange 13 and the ring platform 15 and the connecting strip 16 are arranged to be distributed in the manner of an external connector, the center line of the inner bucket 11, the center line of the flange 13, the center line of the outer bucket 14 and the center line of the ring platform 15 are arranged on the same straight line, two connecting strips 16 are arranged on one of the peripheral side surfaces of the outer bucket 14, one side portion of the bottom wall of the inner bucket 11 is arranged to be connected to the vertical end surface portion of the step platform 12, and the lower portion of the side wall of the inner bucket 11 is respectively arranged to be connected to the horizontal end surface portion of the step platform 12.

[0057] The method of using this embodiment is as follows: apply adhesive colloid on the inner wall of the outer bucket 14 and the upper end surface of the ring platform 15 respectively, put the inner bucket 11 into the outer bucket 14, put the flange 13 on the ring platform 15, so that the peripheral side surface of the inner bucket 11 and the inner wall of the outer bucket 14, the lower end surface of the horizontal part of the flange 13 and the upper end surface of the ring platform 15 are bonded together, put the connecting strip 16 on the insulating bucket arm vehicle mounting device, install the connecting strip 16 on the insulating bucket arm vehicle mounting device by bolts and nuts, the operator steps into the inner bucket 11, so that the operator is located in the inner bucket 11, and the outer bucket 14 is suspended by the insulating bucket arm vehicle mounting device so that the operator is located at the point of action. When the operator completes the operation, the outer bucket 14 is placed in a low position by the insulating bucket arm vehicle mounting device, so that the operator steps out of the inner bucket 11.

[0058] When verifying the utility model, the inventor abandoned the existing technical features of using an insulating bucket body, and first proposed a technical feature of increasing the thickness of the supporting wall of the working bucket, thereby obtaining the first unexpected technical effect: achieving insulation treatment between the layers and improving the insulation performance of the working bucket, and obtaining the second unexpected technical effect: achieving an increased open portion setting and increasing the operating area of ​​the operator, and obtaining the third unexpected technical effect: achieving a smaller bottom setting and improving the stress state of the outer bucket 14 and the inner bucket 11, and obtaining the fourth unexpected technical effect: the integrated support of the flange 13 and the ring platform 15 prevents the outer bucket 14 and the inner bucket 11 from deformation, and obtaining the fifth unexpected technical effect: the step 12 achieves re-support between the side wall and the bottom wall of the inner bucket 11, realizes the internal skeleton connection of the working bucket, and prevents the outer bucket 14 and the inner bucket 11 from misalignment.

[0059] In the second embodiment of the utility model, the outer bucket 14, the inner bucket 11 and the embracing ring component are connected to each other in a manner of increasing the thickness of the supporting wall of the working bucket.

[0060] In this embodiment, the embracing ring component is connected to the outer bucket 14 and the inner bucket 11 in a mosaic connection manner by overlapping the open parts.

[0061] In this embodiment, the embracing ring component is configured to include a flange 13 and a ring platform 15 .

[0062] In this embodiment, a first accessory device is also included and is arranged on the inner bucket 11 , and the first accessory device is arranged as a step 12 .

[0063] In this embodiment, a second accessory device is further included and is disposed on the outer bucket 14 . The second accessory device is configured as a connecting strip 16 .

[0064] The second embodiment of the present utility model is based on the first embodiment.

[0065] The utility model has the following characteristics:

[0066] 1. Due to the design of the outer bucket 14, the inner bucket 11 and the holding ring component, a composite wall layer bucket body setting is realized through the outer bucket 14 and the inner bucket 11, and the outer bucket 14 and the inner bucket 11 are overlapped and the open parts are embedded through the holding ring component, which increases the thickness of the supporting wall of the working bucket and solves the technical problem of using one insulating bucket body, thereby improving the supporting strength of the working bucket.

[0067] 2. Due to the design of the flange 13 and the ring platform 15, the outer bucket 14 and the inner bucket 11 are integrally connected.

[0068] 3. Due to the design of the step platform 12, it is possible to set a heightened platform in the inner bucket 11.

[0069] 3. Due to the design of the connecting strip 16, docking connection with the upper device of the insulating bucket arm vehicle is achieved.

[0070] 4. Since the design limits the numerical range of the structural shape, the numerical range is the technical feature in the technical solution of the utility model, and is not a technical feature calculated by formula or obtained through a limited number of tests. Tests have shown that the technical features of this numerical range have achieved good technical effects.

[0071] 5. Due to the design of the technical features of the utility model, the effects of the individual and combined technical features have been shown through experiments to have various performance indicators of the utility model that are at least 1.7 times the existing performance indicators, and the evaluation shows that the utility model has a good market value.

[0072] There are other technical features that are connected to the outer bucket 14, the inner bucket 11 and the clamping ring component for increasing the thickness of the supporting wall of the working bucket, which are all embodiments of the present utility model, and the technical features of the above-mentioned embodiments can be combined arbitrarily. In order to meet the requirements of the Patent Law, Patent Implementation Rules and Examination Guidelines, all possible combinations of the technical features in the above-mentioned embodiments will no longer be described.

[0073] Therefore, in the technical field of working bucket devices for insulated boom trucks, all technical contents including an outer bucket 14 used as an outer packaging part, an inner bucket 11 used as an inner lining part, and an engaging ring component arranged between the open part of the inner bucket 11 and the open part of the outer bucket 14 are within the protection scope of the present utility model.

Claims

1. A working bucket device for an insulated boom truck, characterized by: The utility model comprises an outer bucket (14) used as an outer packaging part, an inner bucket (11) used as an inner lining part, and an embracing ring component arranged between the open part of the inner bucket (11) and the open part of the outer bucket (14).

2. The working bucket device for an insulated bucket truck according to claim 1 is characterized in that: The outer bucket (14), the inner bucket (11) and the embracing ring component are connected to each other in a manner of increasing the thickness of the supporting wall of the working bucket.

3. The working bucket device for an insulated bucket truck according to claim 2 is characterized in that: The embracing ring component is connected to the outer bucket (14) and the inner bucket (11) in a mosaic connection manner by overlapping the open parts.

4. The working bucket device for an insulated bucket truck according to claim 1, characterized in that: The embracing ring component is configured to include a flange (13) and a ring platform (15). Or, it further comprises a first accessory device and the first accessory device is arranged on the inner bucket (11), and the first accessory device is arranged as a stepping platform (12), Or, it further comprises a second accessory device and the second accessory device is arranged on the outer bucket (14), and the second accessory device is arranged to be a connecting strip plate (16).

5. The working bucket device for an insulated bucket truck according to claim 4 is characterized in that: An inner bucket (11), a ring platform (15) and a connecting strip plate (16) are respectively arranged on the outer bucket (14); a flange (13) is arranged between the ring platform (15) and the inner bucket (11); and a step platform (12) is arranged in the inner bucket (11).

6. The working bucket device for an insulated bucket truck according to claim 5, characterized in that: The outer bucket (14) is configured as a conical box-shaped body and the upper portion of the peripheral side surface of the outer bucket (14) is configured to be connected to the ring platform (15), one portion of the peripheral side surface of the outer bucket (14) is configured to be connected to the connecting strip plate (16), and the outer bucket (14) is configured to be connected to the inner bucket (11) in a receiving manner, and the inner wall of the outer bucket (14) is configured to be connected in a contact manner.

7. The working bucket device for an insulated bucket truck according to claim 5, characterized in that: The inner bucket (11) is configured as a conical box-shaped body, and one side portion of the bottom wall of the inner bucket (11) and the lower portion of the side wall of the inner bucket (11) are respectively configured to be connected to the step (12), and the upper portion of the peripheral side surface of the inner bucket (11) is configured to be connected to the flange (13), the inner bucket (11) is configured to be embeddedly connected to the outer bucket (14), and the peripheral side surface of the inner bucket (11) is configured to be contact-connected to the outer bucket (14).

8. The working bucket device for an insulated bucket truck according to claim 5, characterized in that: The ring platform (15) is configured as an annular body with a rectangular cross section, and the inner end surface of the ring platform (15) is configured to be connected to the outer bucket (14), the ring platform (15) is configured to be embeddedly connected to the flange (13), and the upper end surface of the ring platform (15) is configured to be contact-connected to the flange (13). Alternatively, the flange (13) is configured as an annular body having an L-shaped cross-section and the inner end face portion of the flange (13) is configured to be connected to the inner bucket (11), the flange (13) is configured to be accommodatingly connected to the ring platform (15) and the lower end face portion of the transverse portion of the flange (13) is configured to be contactingly connected to the ring platform (15).

9. The working bucket device for an insulated boom truck according to claim 5, characterized in that: The step platform (12) is configured as an L-shaped plate-like body, and the vertical end surface of the step platform (12) and the horizontal end surface of the step platform (12) are respectively configured to be connected to the inner bucket (11). Alternatively, the connecting strip plate (16) is configured as a strip-shaped body having a through hole, and the inner end surface portion of the connecting strip plate (16) is configured to be connected to the outer bucket (14), and the connecting strip plate (16) is configured to be connected to the insulating bucket arm vehicle upper mounting device via bolts and nuts.

10. The working bucket device for an insulated boom truck according to any one of claims 1 to 9, characterized in that: The inner bucket (11) and the outer bucket (14) are arranged to be distributed in a manner of annular hemming connection with the flange (13) and the ring platform (15); the inner bucket (11), the outer bucket (14), the flange (13) and the ring platform (15) are arranged to be distributed in a manner of an internal reinforcement body with the step platform (12); the inner bucket (11), the outer bucket (14), the flange (13) and the ring platform (15) are arranged to be distributed in a manner of an external connector with the connecting strip (16); Alternatively, the center line of the inner bucket (11), the center line of the flange (13), the center line of the outer bucket (14) and the center line of the ring platform (15) are arranged on the same straight line, two connecting strips (16) are arranged on one part of the peripheral side surface of the outer bucket (14), one side part of the bottom wall of the inner bucket (11) is arranged to be connected to the vertical end surface of the platform (12), and the lower part of the side wall of the inner bucket (11) is respectively arranged to be connected to the horizontal end surface of the platform (12).

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