Lower frame of light excavator

Abstract

The utility model discloses a lower frame of a light excavator, and relates to the technical field of lower frames. The device comprises a cross beam, a buffer mechanism and a configuration mechanism are arranged on the cross beam, the buffer mechanism comprises two first U-shaped blocks fixedly connected to the bottom of the cross beam, connecting rods are hinged to the inner walls of the two first U-shaped blocks, and two girders are arranged at the bottom of the cross beam. Through the arrangement of the buffer mechanism, when the crossbeam is subjected to vibration and noise generated by the movement of a crawler belt or the work of a mechanical part, the crossbeam transmits the received vibration to the U-shaped block II, and the U-shaped block II is matched with the U-shaped block I at the bottom of the cross beam, so that the connecting rod between the U-shaped block II and the U-shaped block I can move up and down; when the connecting rod moves up and down, the damper I and the spring I on the connecting rod can relieve the received vibration, so that the vibration transmitted into a cab on the cross beam is reduced, and adverse effects on operators are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of the lower frame, and particularly relates to a lightweight excavator lower frame. Background Art

[0002] A lightweight excavator lower frame is an important structural component specifically designed for excavators. It is usually made of high-strength but relatively light materials. While ensuring sufficient strength and stiffness to support the upper structure of the excavator and bear various working loads, its own weight is reduced as much as possible. Such a lower frame generally includes main parts such as girders, cross beams, and track frames, as well as some auxiliary structures that may be equipped. Its design focuses on the rationality and optimization of the structure to improve the overall performance and mobility of the excavator. In addition, some special designs may be considered, such as shock-absorbing structures to reduce the impact of vibrations and noises on the operator, and characteristics that are convenient for maintenance and assembly to reduce the use cost and improve the reliability of the equipment.

[0003] The existing lower frame device has obvious deficiencies during use. Since no shock-absorbing device is provided, when the excavator is operating, the engine running, the track moving, and various mechanical components working will generate a large amount of vibrations and noises. These vibrations will be directly transmitted to the lower frame, and then affect the entire body of the excavator. In such a working environment, the operator is easily affected by the noises and vibrations. The noise will not only damage the hearing of the operator, but also interfere with their attention, affecting work efficiency and operation accuracy. The continuous vibrations will make the operator feel fatigued and uncomfortable. Long-term exposure to such a working environment may even have an adverse impact on their physical health. In addition, the lack of a shock-absorbing device may also lead to increased wear of the lower frame and other components connected to it, shortening the service life of the equipment and increasing the maintenance cost. Content of the Utility Model

[0004] The purpose of the utility model is to provide a lightweight excavator lower frame. By setting a buffer mechanism, it solves the problems that when the excavator is operating, the engine running, the track moving, and various mechanical components working will generate a large amount of vibrations and noises. These vibrations will be directly transmitted to the lower frame, and then affect the entire body of the excavator. In such a working environment, the operator is easily affected by the noises and vibrations. The noise will not only damage the hearing of the operator, but also interfere with their attention, affecting work efficiency and operation accuracy. The continuous vibrations will make the operator feel fatigued and uncomfortable. Long-term exposure to such a working environment may even have an adverse impact on their physical health. In addition, the lack of a shock-absorbing device may also lead to increased wear of the lower frame and other components connected to it, shortening the service life of the equipment and increasing the maintenance cost.

[0005] To solve the above technical problems, the present utility model is realized through the following technical solutions:

[0006] The present utility model relates to a lightweight lower frame of an excavator, including a cross beam, on which a buffer mechanism and a configuration mechanism are provided;

[0007] The buffer mechanism includes two U-shaped blocks I fixedly connected to the bottom of the cross beam. Connecting rods are hinged to the inner walls of the two U-shaped blocks I. Two girders are provided at the bottom of the cross beam. Return-shaped sliders are slidably connected to the inner walls of the two girders. U-shaped blocks II are fixedly connected to the two return-shaped sliders. The ends of the two connecting rods far from the cross beam are respectively hinged to the two U-shaped blocks II. Dampers I are fixedly connected to the tops of the two connecting rods. The tops of the two dampers I are fixedly connected to the cross beam. Springs I are wound around the outer walls of the two dampers I.

[0008] Furthermore, one end of each of the two springs I is fixedly connected to the cross beam, and the other end of each of the two springs I is fixedly connected to the two connecting rods.

[0009] Furthermore, the configuration mechanism includes two reinforcement components and a limiting component. The reinforcement component includes a limiting groove opened in the inner wall of the girder. The limiting groove communicates with the return-shaped slider. A threaded rod is slidably sleeved on the inner wall of the limiting groove. A manual turntable is threadedly sleeved on the outer wall of the threaded rod. The manual turntable contacts the return-shaped slider.

[0010] Furthermore, a folding groove is opened on the threaded rod. Two folding rods are rotatably connected to the inner wall of the folding groove. A damper II is fixedly connected to the side where the two folding rods are close to each other.

[0011] Furthermore, a spring II is wound around the outer wall of the damper II. The ends of the spring II far from each other are fixedly connected to the two folding rods.

[0012] Furthermore, the limiting component includes a turntable rotatably sleeved on the cross beam. A sleeve is fixedly connected to the top of the turntable. A hydraulic cylinder is fixedly connected to the inner wall of the bottom of the sleeve. A plurality of U-shaped blocks are fixedly connected to the outer wall of the sleeve. Connecting rods I are hinged to the plurality of U-shaped blocks. The ends of the plurality of connecting rods I far from the sleeve are respectively hinged to a plurality of clamps.

[0013] Furthermore, the output end of the hydraulic cylinder is fixedly connected to a triangular slider. Connecting rods II are hinged to the triangular slider. The ends of the plurality of connecting rods II far from the sleeve are respectively hinged to the plurality of clamps.

[0014] The present utility model has the following beneficial effects:

[0015] (1) The utility model reduces the impact on operators by setting a buffer mechanism. When the vibration and noise generated by the movement of the crawler or the operation of mechanical components are applied to the girder, the girder transfers the received vibration to the second U-shaped block. The second U-shaped block cooperates with the first U-shaped block at the bottom of the crossbeam, enabling the connecting rod between the second U-shaped block and the first U-shaped block to move up and down. During the up and down movement of the connecting rod, the first damper and the first spring on it can relieve the received vibration, thereby reducing the vibration transmitted to the cockpit on the crossbeam and avoiding adverse effects on the operator.

[0016] (2) The utility model reduces the impact on operators by setting a configuration mechanism. In use, first, the two girders can be respectively inserted into the loop-shaped sliders at the bottom of the crossbeam. After the insertion is completed, the threaded rod is inserted into the limiting groove between the girder and the loop-shaped slider. During the insertion process, the two folding rods at the top of the threaded rod can approach each other and compress the second damper and the second spring inside them. In this way, the two folding rods can contract into the folding grooves on the threaded rod, preventing interference with the smooth penetration of the threaded rod through the limiting groove. When the threaded rod penetrates, the two folding rods will expand under the combined action of the second damper and the second spring on them. Then, rotate the manual turntable on the outer wall of the threaded rod to tighten the threaded rod with the cooperation of the two folding rods. Through this setting, the girder and the loop-shaped slider on the threaded rod can be quickly fixed together, effectively reducing the cumbersome processes of installation and disassembly, and thus improving work efficiency.

[0017] Of course, it is not necessary for any product implementing the utility model to achieve all the above advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 is a schematic diagram of the buffer mechanism structure of the present utility model;

[0021] Figure 3 is a schematic diagram of the configuration mechanism structure of the present utility model;

[0022] Figure 4 is Figure 2 a partial enlarged schematic diagram of A in

[0023] Figure 5 is Figure 3Partial enlarged schematic diagram of B;

[0024] Figure 6 is Figure 2 Partial enlarged schematic diagram of C in.

[0025] In the attached drawings, the list of components represented by each label is as follows:

[0026] 1. Cross beam; 2. Buffer mechanism; 3. Configuration mechanism; 21. First U-shaped block; 22. Connecting rod; 23. Girder; 24. Return-shaped slider; 25. Second U-shaped block; 26. First damper; 27. First spring; 31. Limit groove; 32. Threaded rod; 33. Manual turntable; 34. Folding groove; 35. Folding rod; 36. Second damper; 37. Second spring; 38. Turntable; 39. Sleeve; 391. Hydraulic cylinder; 392. U-shaped block; 393. First connecting rod; 394. Clamping; 395. Triangular slider; 396. Second connecting rod. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0028] Please refer to Figures 1-6 As shown, the present invention is a lightweight excavator lower frame, including a cross beam 1, and a buffer mechanism 2 and a configuration mechanism 3 are arranged on the cross beam 1;

[0029] The buffer mechanism 2 includes two first U-shaped blocks 21 fixedly connected to the bottom of the cross beam 1. Connecting rods 22 are hinged to the inner walls of the two first U-shaped blocks 21. Two girders 23 are arranged at the bottom of the cross beam 1. Return-shaped sliders 24 are slidably connected to the inner walls of the two girders 23. Second U-shaped blocks 25 are fixedly connected to the two return-shaped sliders 24. The ends of the two connecting rods 22 far from the cross beam 1 are respectively hinged to the two second U-shaped blocks 25. First dampers 26 are fixedly connected to the tops of the two connecting rods 22. The tops of the two first dampers 26 are fixedly connected to the cross beam 1. First springs 27 are wound around the outer walls of the two first dampers 26.

[0030] One ends of the two first springs 27 are fixedly connected to the cross beam 1, and the other ends of the two first springs 27 are fixedly connected to the two connecting rods 22.

[0031] When the connecting rod 22 moves up and down, the first damper 26 and the first spring 27 thereon can relieve the received vibration, thereby reducing the vibration transmitted to the cockpit on the cross beam 1 and avoiding adverse effects on the operator.

[0032] The configuration mechanism 3 includes two reinforcement components and a limit component. The reinforcement component includes a limit groove 31 opened on the inner wall of the girder 23. The limit groove 31 communicates with the U-shaped slider 24. A threaded rod 32 is slidably sleeved on the inner wall of the limit groove 31. A manual turntable 33 is threadedly sleeved on the outer wall of the threaded rod 32. The manual turntable 33 is in contact with the U-shaped slider 24.

[0033] By rotating the manual turntable 33 on the outer wall of the threaded rod 32, the manual turntable 33 cooperates with two folding rods 35 to tighten the threaded rod 32.

[0034] A folding groove 34 is opened on the threaded rod 32. Two folding rods 35 are rotatably connected to the inner wall of the folding groove 34. A damper II 36 is fixedly connected to the side where the two folding rods 35 are close to each other.

[0035] During the insertion of the threaded rod 32, the two folding rods 35 at the top of the threaded rod 32 can approach each other and compress the damper II 36 and spring II 37 inside. In this way, the two folding rods 35 can be contracted into the folding groove 34 on the threaded rod 32, avoiding affecting the smooth penetration of the threaded rod 32 through the limit groove 31.

[0036] A spring II 37 is wound around the outer wall of the damper II 36. The ends of the spring II 37 away from each other are fixedly connected to the two folding rods 35.

[0037] After the threaded rod 32 penetrates, the two folding rods 35 inside it will unfold under the combined action of the damper II 36 and spring II 37 on it.

[0038] The limit component includes a turntable 38 rotatably sleeved on the cross beam 1. A sleeve 39 is fixedly connected to the top of the turntable 38. A hydraulic cylinder 391 is fixedly connected to the bottom inner wall of the sleeve 39. A plurality of U-shaped blocks 392 are fixedly connected to the outer wall of the sleeve 39. A connecting rod I 393 is hinged to each of the plurality of U-shaped blocks 392. The ends of the plurality of connecting rods I 393 away from the sleeve 39 are all hinged to a plurality of clamps 394.

[0039] Through the cooperation of the plurality of U-shaped blocks 392 and the connecting rod II 396, the clamp 394 can expand in all directions, thereby realizing the fixation of the bottom of the cockpit.

[0040] The output end of the hydraulic cylinder 391 is fixedly connected to a triangular slider 395. A plurality of connecting rods II 396 are hinged to the triangular slider 395. The ends of the plurality of connecting rods II 396 away from the sleeve 39 are all hinged to the plurality of clamps 394.

[0041] By starting the hydraulic cylinder 391, the hydraulic cylinder 391 drives the triangular slider 395 to slide upward, and cooperates with a plurality of second connecting rods 396 and a plurality of first connecting rods 393, so that the clamp 394 can expand around, thereby realizing the fixation of the bottom of the cockpit.

[0042] A specific application of this embodiment is as follows: When in use, first, the two girders 23 can be respectively inserted into the loop-shaped sliders 24 at the bottom of the cross beam 1. After the insertion is completed, the threaded rod 32 is inserted into the limiting groove 31 between the girder 23 and the loop-shaped slider 24. During the insertion process, the two folding rods 35 at the top of the threaded rod 32 can approach each other and compress the damper two 36 and the spring two 37 inside them. In this way, the two folding rods 35 can contract into the folding groove 34 on the threaded rod 32, avoiding affecting the smooth penetration of the threaded rod 32 through the limiting groove 31. When the threaded rod 32 penetrates, the two folding rods 35 will unfold under the combined action of the damper two 36 and the spring two 37 on it. Then, rotate the manual turntable 33 on the outer wall of the threaded rod 32, so that the manual turntable 33 cooperates with the two folding rods 35 to tighten the threaded rod 32. Through this setting, the girder 23 and the loop-shaped slider 24 on the threaded rod 32 can be quickly fixed together, effectively reducing the cumbersome process of installation and disassembly, and thus improving work efficiency; when it is necessary to connect the lower frame with the cockpit part, the fixing part at the bottom of the cockpit can be sleeved on a plurality of clamps 394. Then, start the hydraulic cylinder 391, and the hydraulic cylinder 391 drives the triangular slider 395 to slide upward, and cooperates with a plurality of second connecting rods 396 and a plurality of first connecting rods 393, so that the clamp 394 can expand around, thereby realizing the fixation of the bottom of the cockpit; when the girder 23 is affected by the vibration and noise generated by the movement of the crawler or the operation of mechanical components, the girder 23 will transmit the received vibration to the U-shaped block two 25, and the U-shaped block two 25 will cooperate with the U-shaped block one 21 at the bottom of the cross beam 1, so that the connecting rod 22 between the U-shaped block two 25 and the U-shaped block one 21 can move up and down. Moreover, during the up and down movement of the connecting rod 22, the damper one 26 and the spring one 27 on it can relieve the received vibration, thereby reducing the vibration transmitted to the cockpit on the cross beam 1 and avoiding adverse effects on the operator.

[0043] In the description of this specification, the description with reference to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present 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 can be combined in any one or more embodiments or examples in a suitable manner.

[0044] The preferred embodiments of the present utility model disclosed above are only used to help illustrate the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific embodiments described. Obviously, according to the content of this specification, many modifications and variations can be made. This specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the relevant art can well understand and utilize the present utility model. The present utility model is only limited by the claims and their full scope and equivalents.

Claims

1. A lightweight lower frame of an excavator, comprising a cross beam (1), wherein a buffer mechanism (2) and a configuration mechanism (3) are arranged on the cross beam (1), and it is characterized in that ； The buffer mechanism (2) includes two first U-shaped blocks (21) fixedly connected to the bottom of the cross beam (1). Connecting rods (22) are hinged to the inner walls of the two first U-shaped blocks (21). Two large beams (23) are arranged at the bottom of the cross beam (1). Return-shaped sliders (24) are slidably connected to the inner walls of the two large beams (23). Second U-shaped blocks (25) are fixedly connected to the two return-shaped sliders (24). The ends of the two connecting rods (22) far from the cross beam (1) are respectively hinged to the two second U-shaped blocks (25). Dampers one (26) are fixedly connected to the tops of the two connecting rods (22). The tops of the two dampers one (26) are fixedly connected to the cross beam (1). Springs one (27) are wound around the outer walls of the two dampers one (26).

2. The light-duty excavator lower frame according to claim 1, characterized in that, One ends of the two springs one (27) are fixedly connected to the cross beam (1), and the other ends of the two springs one (27) are fixedly connected to the two connecting rods (22).

3. The light-duty excavator lower frame according to claim 2, wherein, The configuration mechanism (3) includes two reinforcement components and a limiting component. The reinforcement component includes a limiting groove (31) formed in the inner wall of the large beam (23). The limiting groove (31) communicates with the return-shaped slider (24). A threaded rod (32) is slidably sleeved on the inner wall of the limiting groove (31). A manual turntable (33) is threadedly sleeved on the outer wall of the threaded rod (32). The manual turntable (33) is in contact with the return-shaped slider (24).

4. A lightweight lower frame of an excavator according to claim 3, characterized in that, A folding groove (34) is formed in the threaded rod (32). Two folding rods (35) are rotatably connected to the inner wall of the folding groove (34). A damper two (36) is fixedly connected to the side where the two folding rods (35) are close to each other.

5. A lightweight lower frame of an excavator according to claim 4, characterized in that, A spring two (37) is wound around the outer wall of the damper two (36). The ends of the spring two (37) far from each other are fixedly connected to the two folding rods (35).

6. A lightweight lower frame of an excavator according to claim 5, characterized in that, The limiting component includes a turntable (38) rotatably sleeved on the cross beam (1). A sleeve (39) is fixedly connected to the top of the turntable (38). A hydraulic cylinder (391) is fixedly connected to the inner bottom wall of the sleeve (39). A plurality of U-shaped blocks (392) are fixedly connected to the outer wall of the sleeve (39). Connecting rods one (393) are hinged to the plurality of U-shaped blocks (392). The ends of the plurality of connecting rods one (393) far from the sleeve (39) are respectively hinged to a plurality of clamps (394).

7. A lightweight lower frame of an excavator according to claim 6, wherein, The output end of the hydraulic cylinder (391) is fixedly connected to a triangular slider (395). Connecting rods two (396) are hinged to the triangular slider (395). The ends of the plurality of connecting rods two (396) far from the sleeve (39) are respectively hinged to the plurality of clamps (394).

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