Excavator lower frame with stable connecting structure

Abstract

The utility model discloses an excavator lower frame with a stable connecting structure, which belongs to the technical field of excavator lower frames, and is characterized by comprising a lower frame main body and four crawler wheels uniformly mounted on the surface of the lower frame main body, and the upper surface of the lower frame main body is fixedly connected with a connecting plate A; a connecting plate B is arranged at the end, away from the lower frame body, of the connecting plate A, and a bottom plate is rotationally connected to the end, away from the connecting plate A, of the connecting plate B. According to the lower frame, the inserting rods are inserted into the connecting plate A, the limiting blocks are inserted into the limiting holes, and through mutual clamping, the bottom plate is rapidly installed; through movement of a linkage rod, a clamping block is inserted into a clamping groove, limiting of a limiting block is achieved, fixing of an inserting rod is achieved, the mounting firmness of the bottom plate is enhanced, through movement of a hexagonal block on the surface of the hexagonal rod, limiting and rotating of the hexagonal rod are achieved, and the bottom plate is convenient to disassemble.

Description

TECHNICAL FIELD

[0001] The utility model belongs to excavator lower frame technical field, concretely relates to a excavator lower frame with stable connecting structure. BACKGROUND

[0002] The excavator is also called excavating machine, and is a kind of earth-moving machine for excavating materials above or below the support surface into transport vehicles or unloading into stockyard, and the materials excavated by the excavator are mainly soil, coal, sand and soil and rock after pre-loosening.The excavator lower frame is an important component of the excavator, which bears the functions of supporting the main structure of the excavator, transmitting working load and realizing the movement of the excavator.The design of the lower frame directly affects the stability, working efficiency and safety of the excavator.The excavator lower frame is generally integral, which is inconvenient for transportation and installation due to its large size.

[0003] According to the search, the publication (announcement) No.CN208650133U discloses a excavator lower frame, which discloses the technical scheme of "including two track frames, a center top plate and a bottom plate, the center top plate is arranged between the two track frames, the four sides of the top end of the center top plate and the four sides of the bottom end are provided with arc clamps, etc.

[0004] However, in the prior art, if splicing installation is adopted, in order to ensure tightness after installation, multiple locking points are generally selected, so that the multi-point locking structure needs to be installed and disassembled for a long time during use, which is extremely inconvenient to operate, and the installation cost is relatively high.

[0005] Therefore, we propose a excavator lower frame with stable connecting structure to solve the above problems. UTILITY MODEL CONTENTS

[0006] The utility model aims to provide a excavator lower frame with stable connecting structure to solve the problems in the above background.

[0007] To achieve the above object, the utility model provides following technical scheme: a excavator lower frame with stable connecting structure, including lower frame main part and four track wheels evenly installed on the surface of lower frame main part, the upper surface of lower frame main part is fixedly connected with connecting plate A, one end of connecting plate A away from lower frame main part is provided with connecting plate B, one end of connecting plate B away from connecting plate A is rotatably connected with bottom plate, the inside of connecting plate B is provided with rotation groove, the inside of rotation groove is provided with locating plate, locating plate is rotatably connected through rotation groove and connecting plate B, the surface of locating plate is fixedly connected with plug rod, the position of connecting plate A corresponding with plug rod is provided with locating hole, and plug rod penetrates the surface of connecting plate B and is inserted in the inside of locating hole, the inside of connecting plate A is provided with locating hole A, the inside of each locating hole A is provided with limiting block, limiting block is slidably connected through locating hole A and connecting plate A, the position of plug rod corresponding with locating hole A is provided with limiting hole, one end of limiting block away from locating hole A is inserted in the inside of limiting hole, the inside of locating hole A is provided with spring A, both ends of spring A are fixedly connected with limiting block and connecting plate A respectively.

[0008] Preferably, one side of the connecting plate A and the connecting plate B is fixedly connected with a rubber plate, and the limiting hole and the limiting block are trapezoidal structures with upward inclined surfaces.

[0009] Preferably, the bottom surface of the connecting plate A is provided with a locating block, a pressing block is slidably connected in the inside of the locating block, the inside of the locating block is symmetrically provided with a linkage rod, the linkage rod is fixedly connected with the pressing block, a clamping groove is formed in the inside of the limiting block, one end of the linkage rod away from the pressing block penetrates the inside of the connecting plate A and is inserted in the inside of the clamping groove, and the surface of the linkage rod in the inside of the clamping groove is fixedly connected with a clamping block.

[0010] Preferably, a toothed plate A is fixedly connected to the surface of the linkage rod in the inside of the locating block, a limiting slot is formed in the inside of the locating block, a toothed plate B is arranged in the inside of the limiting slot, the toothed plate B is slidably connected through the limiting slot and the locating block, the toothed plate B and the toothed plate A are in meshing engagement, a force applying block is arranged in the inside of the limiting slot, the force applying block is slidably connected through the limiting slot and the locating block, a guide slot is formed in the inside of the force applying block, a guide rod is fixedly connected to the surface of the toothed plate B, the guide rod is inserted in the guide slot and slidably connected with the force applying block.

[0011] Preferably, a spring B is arranged in the inside of the limiting slot, both ends of the spring B are fixedly connected with the locating block and the force applying block respectively.

[0012] Preferably, the inside of the connecting plate B is provided with a hexagonal groove B, the inside of the hexagonal groove B is provided with a hexagonal block, the hexagonal block is slidably connected with the hexagonal groove B and the connecting plate B, the inside of the hexagonal block is provided with a hexagonal groove A, the inside of the hexagonal groove A is provided with a hexagonal rod, the hexagonal rod is slidably connected with the hexagonal groove A and the hexagonal block, and one end of the hexagonal rod is fixedly connected with the positioning plate.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] 1. The utility model discloses a plug rod, a limiting hole and a limiting block are arranged, the plug rod is inserted into the inside of the connecting plate A, the limiting block is inserted into the inside of the limiting hole, and the plug rod is fixed through mutual clamping, thereby realizing quick installation of the bottom plate.

[0015] 2. The utility model discloses a linkage rod, a clamping groove and a clamping block are arranged, the clamping block is inserted into the inside of the clamping groove through the movement of the linkage rod, thereby limiting the limiting block, and the plug rod is fixed, and the firmness of the bottom plate installation is enhanced.

[0016] 3. The utility model discloses a hexagonal rod and a hexagonal block are arranged, the hexagonal block is moved on the surface of the hexagonal rod, the hexagonal rod is limited and rotated, and the bottom plate is conveniently removed. DRAWINGS

[0017] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0018] Figure 2 It is the connecting plate A and the connecting plate B structure schematic diagram of the utility model;

[0019] Figure 3 It is the connecting plate B vertical section structure schematic diagram of the utility model;

[0020] Figure 4 It is the hexagonal block and the hexagonal rod structure schematic diagram of the utility model;

[0021] Figure 5 It is the A part enlarged view of the utility model Figure 3 ;

[0022] Figure 6 It is the B part enlarged view of the utility model Figure 3 .

[0023] In the figure: 1, the lower frame body; 2, track wheel; 3, bottom plate; 4, hexagonal groove A; 5, connecting plate A; 6, connecting plate B; 7, rotating groove; 8, positioning plate; 9, insertion rod; 10, limiting hole; 11, limiting block; 12, positioning hole A; 13, spring A; 14, linkage rod; 15, clamping groove; 16, clamping block; 17, toothed plate A; 18, positioning block; 19, toothed plate B; 20, limiting groove; 21, force block; 22, guide groove; 23, guide rod; 24, spring B; 25, hexagonal block; 26, hexagonal groove B; 27, hexagonal rod; 28, pressing block. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] Please refer to Figures 1-6 The utility model provides a kind of excavator lower frame with stable connecting structure, including lower frame body 1 and four track wheels 2 being evenly installed on the surface of lower frame body 1, the upper surface of lower frame body 1 is fixedly connected with connecting plate A 5, the end of connecting plate A 5 away from lower frame body 1 is provided with connecting plate B 6, the end of connecting plate B 6 away from connecting plate A 5 is rotatably connected with bottom plate 3, rotating groove 7 is arranged in the inside of connecting plate B 6, positioning plate 8 is arranged in the inside of rotating groove 7, positioning plate 8 is rotatably connected by rotating groove 7 and connecting plate B 6, the surface of positioning plate 8 is fixedly connected with insertion rod 9, positioning hole is arranged in the position corresponding with insertion rod 9 of connecting plate A 5, and insertion rod 9 penetrates the surface of connecting plate B 6 and is inserted in the inside of positioning hole, positioning hole A 12 is arranged in the inside of connecting plate A 5, limiting block 11 is arranged in the inside of each positioning hole A 12, limiting block 11 is slidably connected by positioning hole A 12 and connecting plate A 5, limiting hole 10 is arranged in the position corresponding with positioning hole A 12 of insertion rod 9, the end of limiting block 11 away from positioning hole A 12 is inserted in the inside of limiting hole 10, spring A 13 is arranged in the inside of positioning hole A 12, and the two ends of spring A 13 are fixedly connected with limiting block 11 and connecting plate A 5 respectively.

[0026] In the embodiment, the side adjacent to connecting plate A 5 and connecting plate B 6 of both is fixedly connected with rubber plate, and limiting hole 10 and limiting block 11 are all trapezoidal structure, and the inclined surface all faces upwards.

[0027] In the embodiment, the bottom surface of the connecting plate A5 is provided with a positioning block 18, the inside of the positioning block 18 is slidably connected with a pressing block 28, the inside of the positioning block 18 is symmetrically provided with a linkage rod 14, the linkage rod 14 is fixedly connected with the pressing block 28, the inside of the limiting block 11 is provided with a clamping groove 15, one end of the linkage rod 14 away from the pressing block 28 penetrates through the inside of the connecting plate A5 and is inserted into the inside of the clamping groove 15, and the surfaces of the linkage rod 14 located in the clamping groove 15 are all fixedly connected with clamping blocks 16.

[0028] In the embodiment, the surface of the linkage rod 14 located in the inside of the positioning block 18 is fixedly connected with a toothed plate A17, the inside of the positioning block 18 is provided with a limiting groove 20, the inside of the limiting groove 20 is provided with a toothed plate B19, the toothed plate B19 is slidably connected with the limiting groove 20 and the positioning block 18, the toothed plate B19 is meshed with the toothed plate A17, the inside of the limiting groove 20 is provided with a pressing block 21, the pressing block 21 is slidably connected with the limiting groove 20 and the positioning block 18, the inside of the pressing block 21 is provided with a guide groove 22, the surface of the toothed plate B19 is fixedly connected with a guide rod 23, the guide rod 23 is inserted into the guide groove 22 and is slidably connected with the pressing block 21, the inside of the limiting groove 20 is provided with a spring B24, and both ends of the spring B24 are fixedly connected with the positioning block 18 and the pressing block 21.

[0029] In the embodiment, the inside of the connecting plate B6 is provided with a hexagonal groove B26, the inside of the hexagonal groove B26 is provided with a hexagonal block 25, the hexagonal block 25 is slidably connected with the hexagonal groove B26 and the connecting plate B6, the inside of the hexagonal block 25 is provided with a hexagonal groove A4, the inside of the hexagonal groove A4 is provided with a hexagonal rod 27, the hexagonal rod 27 is slidably connected with the hexagonal groove A4 and the hexagonal block 25, and one end of the hexagonal rod 27 is fixedly connected with the positioning plate 8.

[0030] The utility model discloses a working principle: when need to install bottom plate 3, place bottom plate 3 at the top of lower frame main body 1, then make connecting plate A5 and connecting plate B6 mutually adhere, make that plug pole 9 inserts the inside of connecting plate A5, when plug pole 9 inserts the inside of connecting plate A5, will extrude limiting block 11, limiting block 11 will slide to the inside of positioning hole A12, spring A13 will be compressed, until limiting hole 10 and limiting block 11 are same axis, limiting block 11 will insert the inside of limiting hole 10 due to the elastic potential of spring A13, the preliminary positioning of plug pole 9 is realized through limiting block 11, then exerts force on forcing block 21, makes forcing block 21 move upwards in the inside of limiting groove 20, due to the shape of guide groove 22, will limit guide rod 23, guide rod 23 will move downwards in the inside of guide groove 22, guide rod 23 will pull toothed plate B19, makes toothed plate B19 separate from linkage lever 14, then presss down pressure block 28, and pressure block 28 moves will drive linkage lever 14 to move to the direction of connecting plate A5, until the insertion of clamping block 16 in the inside of clamping groove 15, limiting block 11 is limited through the shape of clamping block 16, prevents limiting block 11 from loosening due to brute force, then releases the exertion of force on forcing block 21, makes forcing block 21 return to the original position due to the elastic potential of spring B24 and gravity, makes toothed plate B19 and toothed plate A17 mutually engage, realizes the positioning of linkage lever 14, realizes the quick connection of bottom plate 3 when needing to remove bottom plate 3, makes guide groove 22 move upwards, makes toothed plate B19 separate from toothed plate A17, and clamping block 16 will slide from the inside of clamping groove 15, then pulls out hexagonal block 25 from the inside of hexagonal groove B26, then rotates hexagonal block 25, and the rotation of hexagonal block 25 will drive positioning plate 8 to rotate through hexagonal rod 27, limiting block 11 is separated from the inside of limiting hole 10 by extruding limiting block 11 through the shape of limiting hole 10, and the limiting of plug pole 9 is released, so that bottom plate 3 can be removed.

[0031] The electronic components and modules used in the utility model can be the parts commonly used in the market, which can realize the specific functions in the case, and the specific model and size can be selected and adjusted according to actual needs.

[0032] The basic principle, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited by the above examples, and the above examples and descriptions in the specification only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model can also have various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A lower carriage of a shovel having a stable connection structure, comprising a lower carriage main body (1) and four track wheels (2) which are uniformly installed on the surface of the lower carriage main body (1), characterized in that: The upper surface of the lower frame body (1) is fixedly connected with a connecting plate A (5), one end of the connecting plate A (5) away from the lower frame body (1) is provided with a connecting plate B (6), one end of the connecting plate B (6) away from the connecting plate A (5) is rotatably connected with a bottom plate (3), a rotating groove (7) is formed in the connecting plate B (6), a positioning plate (8) is arranged in the rotating groove (7), the positioning plate (8) is rotatably connected with the rotating groove (7) and the connecting plate B (6), the surface of the positioning plate (8) is fixedly connected with a plug rod (9), the connecting plate A (5) is provided with a positioning hole corresponding to the plug rod (9), the plug rod (9) penetrates the surface of the connecting plate B (6) and is inserted into the positioning hole, a positioning hole A (12) is formed in the connecting plate A (5), a limiting block (11) is arranged in each positioning hole A (12), the limiting block (11) is slidably connected with the positioning hole A (12) and the connecting plate A (5), a limiting hole (10) is formed in the connecting plate A (5) and the positioning hole A (12) corresponding to the plug rod (9), one end of the limiting block (11) away from the positioning hole A (12) is inserted into the limiting hole (10), a spring A (13) is arranged in the positioning hole A (12), and the two ends of the spring A (13) are fixedly connected with the limiting block (11) and the connecting plate A (5) respectively.

2. The undercarriage of a backhoe having a secure attachment structure as defined in claim 1, wherein: The side of the connecting plate A (5) adjacent to the connecting plate B (6) is fixedly connected with a rubber plate, the limiting hole (10) and the limiting block (11) are both trapezoidal structures, and the inclined surfaces are upward.

3. The undercarriage of a backhoe having a secure attachment structure as defined in claim 1, wherein: The bottom surface of the connecting plate A (5) is provided with a positioning block (18), a pressing block (28) is slidably connected in the positioning block (18), the positioning block (18) is symmetrically provided with a linkage rod (14) inside, the linkage rod (14) and the pressing block (28) are fixedly connected, a clamping groove (15) is formed in the limiting block (11), one end of the linkage rod (14) away from the pressing block (28) penetrates the inside of the connecting plate A (5) and is inserted into the clamping groove (15), and the surface of the linkage rod (14) in the clamping groove (15) is fixedly connected with a clamping block (16).

4. The undercarriage of a backhoe having a secure attachment structure as defined in claim 3, wherein: The surface of the linkage rod (14) inside the positioning block (18) is fixedly connected with a tooth plate A (17), the inside of the positioning block (18) is provided with a limiting groove (20), the inside of the limiting groove (20) is provided with a tooth plate B (19), the tooth plate B (19) is slidably connected with the limiting groove (20) and the positioning block (18), the tooth plate B (19) is engaged with the tooth plate A (17), the inside of the limiting groove (20) is provided with a force applying block (21), the force applying block (21) is slidably connected with the limiting groove (20) and the positioning block (18), the inside of the force applying block (21) is provided with a guide groove (22), the surface of the tooth plate B (19) is fixedly connected with a guide rod (23), the guide rod (23) is inserted into the guide groove (22) and slidably connected with the force applying block (21).

5. The undercarriage of a backhoe having a secure attachment structure as defined in claim 4, wherein: The inside of the limiting groove (20) is provided with a spring B (24), and the two ends of the spring B (24) are fixedly connected with the positioning block (18) and the force applying block (21) respectively.

6. The undercarriage of a backhoe having a secure attachment structure as defined in claim 1, wherein: The inside of the connecting plate B (6) is provided with a hexagonal groove B (26), the inside of the hexagonal groove B (26) is provided with a hexagonal block (25), the hexagonal block (25) is slidably connected with the hexagonal groove B (26) and the connecting plate B (6), the inside of the hexagonal block (25) is provided with a hexagonal groove A (4), the inside of the hexagonal groove A (4) is provided with a hexagonal rod (27), the hexagonal rod (27) is slidably connected with the hexagonal groove A (4) and the hexagonal block (25), and one end of the hexagonal rod (27) is fixedly connected with the positioning plate (8).

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