Cargo boom structure of recreational excavator

Abstract

The utility model relates to the technical field of recreational excavators, in particular to a recreational excavator cargo boom structure which comprises a support, a movable arm, a bucket rod and a bucket which are sequentially hinged end to end, and the support is fixedly installed at the front end of a recreational excavator body. A first connecting rod assembly used for driving the movable arm to swing relative to the support is arranged between the support and the movable arm, and a second connecting rod assembly used for driving the bucket rod to swing relative to the movable arm is arranged between the movable arm and the bucket rod. A third connecting rod assembly used for driving the bucket to swing relative to the bucket rod is arranged between the bucket rod and the bucket. Driving of the movable arm, the bucket rod and the bucket of the recreational excavator can be achieved without participation of hydraulic elements, and therefore potential safety hazards caused when the recreational excavator serves as a toy for children are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of recreational excavators, in particular to a lifting arm structure of a recreational excavator. Background Art

[0002] An excavator, also known as a backhoe, is an earth-moving machine that uses a bucket to dig materials above or below the bearing surface and load them into a transport vehicle or unload them to a stockpile. The materials excavated by the excavator are mainly soil, coal, silt, and pre-loosened soil and rock. From the development of engineering machinery in recent years, the development of excavators has been relatively fast, and excavators have become one of the most important engineering machinery in engineering construction. The transmission mechanism of the excavator transmits the power of the engine to the hydraulic motor, hydraulic cylinder and other actuators through the hydraulic pump, driving the working device to move, thereby completing various operations.

[0003] The recreational excavator is a device designed for children's entertainment and can bring a pleasant physical and mental experience to young children. Although the existing recreational excavators can imitate the real excavators in appearance, it is still difficult for the recreational excavators to complete the digging action under the drive mechanism like the real excavators. One of the reasons is that if the recreational excavator adopts the same hydraulic transmission mechanism as the real excavator, it is easy to have safety hazards such as oil leakage, so it is not suitable for children to play. Utility Model Content

[0004] The purpose of the utility model is to provide a lifting arm structure of an amusement excavator to solve the above technical problems.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A lifting arm structure of a recreational excavator, comprising a bracket, a boom, a dipper arm and a bucket which are hinged in sequence from head to tail, wherein the bracket is fixedly mounted on the front end of the recreational excavator body;

[0007] A first connecting rod assembly is provided between the bracket and the boom for driving the boom to swing relative to the bracket, a second connecting rod assembly is provided between the boom and the dipper arm for driving the dipper arm to swing relative to the boom, and a third connecting rod assembly is provided between the dipper arm and the bucket for driving the dipper arm to swing relative to the dipper arm.

[0008] As a further technical solution, the first connecting rod assembly includes:

[0009] a first driving link, the first driving link being rotatably mounted on the movable arm;

[0010] A first driven connecting rod, one end of which is hinged to the first driving connecting rod, and the other end of which is hinged to the bracket.

[0011] As a further technical solution, a tension spring is fixedly provided at the hinge between the first driving link and the first driven link, and the other end of the tension spring is fixedly connected to one end of the movable arm close to the bracket.

[0012] As a further technical solution, the second connecting rod assembly includes:

[0013] a second driving connecting rod, the second driving connecting rod being rotatably mounted on the movable arm;

[0014] A second driven connecting rod, one end of which is hinged to the second driving connecting rod, and the other end of which is hinged to the bucket arm.

[0015] As a further technical solution, a hinge support is fixedly provided on the bucket, and the third connecting rod assembly includes:

[0016] a first auxiliary connecting rod, one end of which is rotatably mounted on the bucket arm;

[0017] a second auxiliary connecting rod, one end of which is hinged on the hinge support;

[0018] a third driving connecting rod, the third driving connecting rod being rotatably mounted on the bucket arm;

[0019] A third driven connecting rod, one end of which is hinged on the hinge support, and the third driven connecting rod, the second auxiliary connecting rod and the first auxiliary connecting rod are hinged on the same axis.

[0020] Beneficial effects of the utility model:

[0021] (1) The utility model replaces the hydraulic transmission mechanism by disposing the first, second and third connecting rod assemblies, and can drive the boom, arm and bucket of the recreational excavator without the participation of hydraulic components, thereby reducing the safety hazards of the recreational excavator as a children's toy;

[0022] (2) In the utility model, the tension spring is provided to provide auxiliary force for the lifting process of the boom, thereby enhancing the stability of the boom lifting action of the recreational excavator. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The utility model is further described below in conjunction with the accompanying drawings.

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0025] Figure 2 It is a plan view of the utility model;

[0026] Figure 3It is a plan view of the utility model in another posture;

[0027] Figure numerals: 1. recreational excavator body; 2. boom; 3. arm; 4. bucket; 5. first connecting rod assembly; 6. second connecting rod assembly; 7. third connecting rod assembly; 8. bracket; 51. first driving connecting rod; 52. first driven connecting rod; 53. tension spring; 61. second driving connecting rod; 62. second driven connecting rod; 71. first auxiliary connecting rod; 72. second auxiliary connecting rod; 73. third driving connecting rod; 74. third driven connecting rod. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] like Figure 1-3 As shown, a lifting arm structure of an amusement excavator comprises a bracket 8, a boom 2, a dipper arm 3 and a bucket 4 which are hinged in sequence from head to tail, and the bracket 8 is fixedly mounted on the front end of the amusement excavator body 1;

[0030] A first connecting rod assembly 5 is provided between the bracket 8 and the boom 2 for driving the boom 2 to swing relative to the bracket 8, a second connecting rod assembly 6 is provided between the boom 2 and the dipper arm 3 for driving the dipper arm 3 to swing relative to the boom 2, and a third connecting rod assembly 7 is provided between the dipper arm 3 and the bucket 4 for driving the dipper arm 4 to swing relative to the dipper arm 3.

[0031] Through the above technical solution, this embodiment provides the main content of the structure of the boom of the recreational excavator. By setting the first, second and third connecting rod assemblies, the hydraulic transmission mechanism is replaced, and the driving of the boom 2, the dipper arm 3 and the bucket 4 of the recreational excavator can be realized without the participation of hydraulic components, thereby reducing the safety hazard of the recreational excavator as a children's toy. In addition, it should be noted that the first, second and third connecting rod assemblies are all electric drive assemblies, and specifically three independent servo motors can be used as drive sources.

[0032] The first connecting rod assembly 5 comprises:

[0033] A first driving connecting rod 51, wherein the first driving connecting rod 51 is rotatably mounted on the movable arm 2;

[0034] A first driven connecting rod 52 , one end of which is hinged to the first driving connecting rod 51 , and the other end of which is hinged to the bracket 8 .

[0035] Through the above technical solution, in this embodiment, the first driving connecting rod 51 can be driven by a servo motor. Figure 2 and Figure 3 It can be known that the swing of the first driving connecting rod 51 can drive the relative swing of the second driven connecting rod 62 , thereby completing the swing of the boom 2 .

[0036] A tension spring 53 is fixedly provided at a hinged joint between the first driving link 51 and the first driven link 52 , and the other end of the tension spring 53 is fixedly connected to one end of the movable arm 2 close to the bracket 8 .

[0037] Through the above technical solution, in this embodiment, a tension spring 53 is arranged between the first driving link 51 and the first driven link 52 at the hinge of the movable arm 2. Figure 2 to Figure 3 During the process, the contraction of the tension spring 53 provides auxiliary force for the process, thereby facilitating the lifting of the boom 2.

[0038] The second connecting rod assembly 6 comprises:

[0039] A second driving connecting rod 61, wherein the second driving connecting rod 61 is rotatably mounted on the movable arm 2;

[0040] A second driven connecting rod 62 , one end of which is hinged to the second driving connecting rod 61 , and the other end of which is hinged to the bucket arm 3 .

[0041] According to the above technical solution, in this embodiment, the second driving connecting rod 61 can be driven by a servo motor. Figure 2-3 As shown, the swinging of the second driving link 61 and the second driven link 62 can complete the swinging of the bucket arm 3 relative to the boom 2.

[0042] The bucket 4 is fixed with a hinge support, and the third connecting rod assembly 7 includes:

[0043] A first auxiliary connecting rod 71, one end of which is rotatably mounted on the bucket arm 3;

[0044] A second auxiliary connecting rod 72, one end of which is hinged on the hinge support;

[0045] A third driving connecting rod 73, wherein the third driving connecting rod 73 is rotatably mounted on the bucket arm 3;

[0046] A third driven link 74, one end of which is hinged on the hinge support, and the third driven link 74, the second auxiliary link 72 and the first auxiliary link 71 are hinged on the same axis.

[0047] Through the above technical solution, in this embodiment, the third driving link 73 can be driven by a servo motor, and the swing of the third driving link 73 drives the first auxiliary link 71 to rotate through the transmission action of the third driven link 74, and then the transmission action of the second auxiliary link 72 drives the bucket 4 to complete the digging action.

[0048] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A lifting arm structure of a recreational excavator, characterized in that: It comprises a bracket (8), a boom (2), a dipper arm (3) and a bucket (4) which are hinged in sequence at the front and rear ends, wherein the bracket (8) is fixedly mounted on the front end of the recreational excavator body (1); A first connecting rod assembly (5) is provided between the bracket (8) and the boom (2) for driving the boom (2) to swing relative to the bracket (8); a second connecting rod assembly (6) is provided between the boom (2) and the dipper arm (3) for driving the dipper arm (3) to swing relative to the boom (2); and a third connecting rod assembly (7) is provided between the dipper arm (3) and the bucket (4) for driving the dipper arm (4) to swing relative to the dipper arm (3); The first connecting rod assembly (5) comprises: a first driving connecting rod (51), the first driving connecting rod (51) being rotatably mounted on the movable arm (2); a first driven connecting rod (52), one end of the first driven connecting rod (52) being hinged to the first driving connecting rod (51), and the other end of the first driven connecting rod (52) being hinged to the bracket (8); A tension spring (53) is fixedly provided at the hinged joint between the first driving connecting rod (51) and the first driven connecting rod (52), and the other end of the tension spring (53) is fixedly connected to one end of the movable arm (2) close to the bracket (8).

2. The boom structure of a recreational excavator according to claim 1, characterized in that: The second connecting rod assembly (6) comprises: a second driving connecting rod (61), the second driving connecting rod (61) being rotatably mounted on the movable arm (2); A second driven connecting rod (62), one end of the second driven connecting rod (62) being hinged to the second driving connecting rod (61), and the other end of the second driven connecting rod (62) being hinged to the boom (3).

3. The boom structure of a recreational excavator according to claim 1, characterized in that: A hinge support is fixedly provided on the bucket (4), and the third connecting rod assembly (7) comprises: A first auxiliary connecting rod (71), one end of the first auxiliary connecting rod (71) being rotatably mounted on the bucket arm (3); A second auxiliary connecting rod (72), one end of the second auxiliary connecting rod (72) being hinged on the hinge support; a third driving connecting rod (73), the third driving connecting rod (73) being rotatably mounted on the bucket arm (3); A third driven connecting rod (74), one end of the third driven connecting rod (74) is hinged on the hinge support, and the third driven connecting rod (74), the second auxiliary connecting rod (72) and the first auxiliary connecting rod (71) are hinged on the same axis.

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