Multi-degree-of-freedom side swing type miniature excavator

Abstract

The invention belongs to the technical field of excavators, and discloses a multi-degree-of-freedom side swing type miniature excavator which comprises a movable frame, a movable crawler belt is embedded in the surface of the movable frame, an adjusting assembly used for changing the distance between the movable frames is arranged between the movable frames, and a large rotating arm is arranged at the top of the adjusting assembly. A side swing assembly used for enabling the rotating large arm to swing left and right is arranged between the rotating large arm and the adjusting assembly, the rotating large arm is movably connected with the side swing assembly, and in the adjusting assembly, a connecting base can extend and expand towards the two sides of the supporting frame under the action of a telescopic oil cylinder, so that the distance between the movable frames is changed; the distance between a movable plate and a balancing weight in the adjusting assembly can be adjusted under the action of an adjusting motor and a two-way lead screw, so that the gravity center of the whole excavator cannot be greatly changed, the flexibility of the excavator is improved through the design, the excavator can adapt to different working environments, and the service life of the excavator is prolonged. And the working stability of the excavator is improved.

Description

Technical Field

[0001] The invention relates to the technical field of excavators, and in particular to a multi-degree-of-freedom side-swing mini excavator. Background Art

[0002] An excavator, also known as an excavator or a backhoe, is an earth-moving machine that uses a bucket to dig materials above or below the supporting surface and loads them into a transport vehicle or unloads them to a stockpile yard. A micro excavator refers to a smaller excavator, and excavators are generally moved using driven crawler tracks.

[0003] For example, the invention with announcement number CN105178369B provides a mini excavator for gardening, including: a lower walking body; an upper rotating body, which is located above the lower walking body and connected to the lower walking body through a suspension device; a front working device, which is located directly in front of the upper rotating body, including a boom, a dipper, and a bucket; a first groove is provided below the end of the dipper, in which a hydraulic scissors is provided, the hydraulic scissors are connected to the end of the dipper, and are ejected or retracted by rotation; a camera device, which is located inside the dipper; wherein a filter mesh groove is provided at the bottom of the bucket shell. This invention improves the working efficiency of the excavator and has the beneficial effect of being able to operate in poor light and poor vision.

[0004] The prior art has the following problems: the bases of the existing mini excavators are mostly fixed and cannot be telescopically adjusted, resulting in the excavators being unable to adapt to different working environments and requirements during operation; and the existing mini excavators cannot be lateral swung, resulting in the mini excavators being unable to operate flexibly in narrow environments, reducing the flexibility of the excavators and resulting in reduced working efficiency of the excavators.

[0005] For this purpose, a multi-degree-of-freedom side-swing mini excavator is proposed. Summary of the invention

[0006] The purpose of the present invention is to solve the problem that the bases of most existing mini excavators are fixed and cannot be telescopically adjusted, resulting in the excavator being unable to adapt to different working environments and requirements during operation, and the existing mini excavators cannot be side-swung, resulting in the mini excavator being unable to operate flexibly in a narrow environment, reducing the flexibility of the excavator and resulting in reduced working efficiency of the excavator. The present invention provides a multi-degree-of-freedom side-swing mini excavator.

[0007] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0008] A multi-degree-of-freedom side-swing mini excavator comprises a mobile frame, a mobile crawler is embedded on the surface of the mobile frame, an adjustment component for changing the spacing between the mobile frames is arranged between the mobile frames, a rotating boom is arranged on the top of the adjustment component, a side-swing component for swinging the rotating boom left and right is arranged between the rotating boom and the adjustment component, and the rotating boom is movably connected to the side-swing component.

[0009] As a further solution of the present invention, the adjustment component includes a support frame, a surface array of the support frame is provided with guide grooves, connecting seats are provided on both sides of the support frame, and the connecting seats are respectively fixedly connected to the movable frame, the inner array of the connecting seat is provided with guide columns, and the guide columns are movably connected to the guide grooves, adjustment balls are evenly provided on the surface of the guide columns, and the adjustment balls are rollingly connected to the guide columns, storage grooves are provided on both sides of the support frame, telescopic cylinders are fixed in the storage grooves, and the output ends of the telescopic cylinders are fixedly connected to the connecting seats.

[0010] As a further scheme of the present invention, a guide bar is fixed on the top surface of the support frame, and the guide bar is an axially symmetrical structure with respect to the support frame, a movable plate and a counterweight block are respectively provided on the top surface of the support frame, and the movable plate and the counterweight block are respectively movably connected to the guide bar, movable grooves are respectively provided on the bottom surfaces of the movable plate and the counterweight block, a fixed block is provided on the top surface of the support frame, a bidirectional screw rod is provided between the fixed blocks, and the bidirectional screw rod is respectively threadedly connected to the movable plate and the counterweight block, and an adjusting motor is fixed to one end of the bidirectional screw rod.

[0011] As a further solution of the present invention, a fixed seat is provided on the top surface of the movable plate, a rotating groove is opened on the top surface of the fixed seat, a gear bar is fixed on the inner side of the rotating groove, a limiting groove is opened on the top surface of the fixed seat, a rotating ball is provided in an array on the top surface of the fixed seat, and the rotating ball is rollingly connected to the fixed seat.

[0012] As a further solution of the present invention, the side swing assembly includes an adapter plate, a limit block is fixed on the bottom surface of the adapter plate, and the limit block is rotatably connected to the limit groove, a rotating motor is fixed in the adapter plate, and the output end of the rotating motor passes through the bottom surface of the adapter plate, and a transmission gear is fixed at the output end of the rotating motor, and the transmission gear and the gear bar are meshed with each other.

[0013] As a further solution of the present invention, a fixed frame is provided on the top surface of the adapter plate, a movable seat is provided in the fixed frame, and the movable seat is rotatably connected to the adapter plate, a side swing groove is opened on the top surface of the movable seat, and the bottom end of the rotating arm is rotatably connected to the side swing groove, a side swing cylinder is provided between the rotating arm and the movable seat, and the side swing cylinder is an axially symmetrical structure with respect to the movable seat.

[0014] As a further solution of the present invention, the surface array of the rotating arm is provided with positioning holes, a positioning cylinder is fixed to the surface of the movable seat, a positioning column is provided at the output end of the positioning cylinder, and the positioning column is movably connected to the positioning hole.

[0015] As a further solution of the present invention, a first excavation cylinder is provided between the fixed frame and the rotating arm, a movable arm is provided at one end of the rotating arm, and the movable arm is rotatably connected to the rotating arm, a second excavation cylinder is provided between the rotating arm and the movable arm, a bucket is provided at one end of the movable arm, and the bucket is rotatably connected to the movable arm, and a third excavation cylinder is provided between the bucket and the movable arm.

[0016] As a further solution of the present invention, a control chamber is fixed on the top surface of the adapter plate, and the control chamber is electrically connected to the regulating motor and the rotating motor respectively.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The present invention provides an adjustment component in the mini excavator. In the adjustment component, the connecting seat can extend to both sides of the supporting frame under the action of the telescopic cylinder, thereby changing the spacing between the mobile frames, and the movable plate and the counterweight block in the adjustment component can be adjusted in spacing under the action of the adjustment motor and the bidirectional screw rod, so that the center of gravity of the excavator as a whole will not change too much. These designs not only improve the flexibility of the excavator, enable the excavator to adapt to different working environments, but also improve the stability of the excavator when working.

[0019] 2. The present invention provides a side-swing assembly between the rotating boom and the adjusting assembly. In the side-swing assembly, the movable seat can rotate forward and backward in the fixed frame, so that the excavator can perform frontal excavation operations. In addition, a side-swing cylinder is provided between the movable seat and the rotating boom. Under the action of the side-swing cylinder, the rotating boom can swing left and right in the side-swing groove. This design enables the excavator to perform a large range of excavation operations in a narrow space, thereby improving the working efficiency of the excavator. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is an axonometric view of the present invention;

[0021] Figure 2 is an overall cross-sectional view of the present invention;

[0022] Figure 3 It is an exploded view of the overall structure of the present invention;

[0023] Figure 4 is a side view of the present invention;

[0024] Figure 5 is a structural diagram of the regulating assembly of the present invention;

[0025] Figure 6 is a cross-sectional view of the adjustment assembly of the present invention;

[0026] Figure 7 is an exploded view of the structure of the adjustment assembly of the present invention;

[0027] Figure 8 is a structural diagram of the side swing assembly of the present invention;

[0028] Fig. 9 is a cross-sectional view of a side swing assembly of the present invention;

[0029] Fig.10 It is a structural exploded view of the side swing assembly of the present invention.

[0030] Figure numerals: 1, adjustment assembly; 101, guide column; 102, support frame; 103, connecting seat; 104, guide bar; 105, movable plate; 106, fixed seat; 107, rotating groove; 108, counterweight block; 109, movable groove; 110, two-way screw rod; 111, guide groove; 112, limit groove; 113, rotating ball; 114, fixed block; 115, storage groove; 116, telescopic cylinder; 117, adjustment motor; 118, gear bar; 119, adjustment roller bead; 2. side swing assembly; 201. side swing cylinder; 202. side swing slot; 203. movable seat; 204. fixed frame; 205. adapter plate; 206. positioning column; 207. transmission gear; 208. limit block; 209. positioning cylinder; 210. rotating motor; 3. mobile frame; 4. control room; 5. mobile crawler; 6. bucket; 7. first excavation cylinder; 8. second excavation cylinder; 9. third excavation cylinder; 10. movable arm; 11. rotating arm; 12. positioning hole. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0034] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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.

[0035] The following will be combined Figure 1-Figure 10 A multi-degree-of-freedom side-swing mini excavator according to an embodiment of the present invention is described in detail.

[0036] Embodiment 1: Embodiment 1 of the present application discloses a multi-degree-of-freedom side-swing mini excavator. Figure 1-Figure 10 , including a mobile frame 3, a mobile crawler 5 is nested on the surface of the mobile frame 3, an adjusting component 1 for changing the spacing between the mobile frames 3 is provided between the mobile frames 3, a rotating boom 11 is provided on the top of the adjusting component 1, a side swing component 2 for swinging the rotating boom 11 left and right is provided between the rotating boom 11 and the adjusting component 1, and the rotating boom 11 is movably connected to the side swing component 2.

[0037] Specifically, in the adjustment component 1, the connecting seat 103 can extend to both sides of the support frame 102 under the action of the telescopic cylinder 116, thereby changing the spacing between the movable frames 3, and the movable plate 105 and the counterweight block 108 in the adjustment component 1 can be adjusted in spacing under the action of the adjustment motor 117 and the bidirectional screw rod 110, so that the overall center of gravity of the excavator will not change too much. These designs not only improve the flexibility of the excavator, enabling the excavator to adapt to different working environments, but also improve the stability of the excavator during operation.

[0038] The adjustment component 1 includes a support frame 102, a surface array of the support frame 102 is provided with a guide groove 111, two sides of the support frame 102 are provided with a connecting seat 103, and the connecting seat 103 is respectively fixedly connected to the moving frame 3, the inner side array of the connecting seat 103 is provided with a guide column 101, and the guide column 101 is movably connected to the guide groove 111, the surface of the guide column 101 is evenly provided with an adjustment ball 119, and the adjustment ball 119 is rollingly connected to the guide column 101, two sides of the support frame 102 are provided with a storage groove 115, a telescopic cylinder 116 is fixed in the storage groove 115, and the output end of the telescopic cylinder 116 is fixedly connected to the connecting seat 103, a guide bar 104 is fixed on the top surface of the support frame 102, and the guide bar 104 is an axisymmetric structure with respect to the support frame 102, and the top surface of the support frame 102 is respectively provided with There are a movable plate 105 and a counterweight block 108, and the movable plate 105 and the counterweight block 108 are respectively movably connected to the guide bar 104, and movable grooves 109 are respectively provided on the bottom surfaces of the movable plate 105 and the counterweight block 108. A fixed block 114 is provided on the top surface of the support frame 102, and a bidirectional screw rod 110 is provided between the fixed blocks 114, and the bidirectional screw rod 110 is respectively threadedly connected to the movable plate 105 and the counterweight block 108, and an adjusting motor 117 is fixed to one end of the bidirectional screw rod 110. A fixed seat 106 is provided on the top surface of the movable plate 105, and a rotating groove 107 is provided on the top surface of the fixed seat 106. A gear bar 118 is fixed on the inner side of the rotating groove 107, and a limiting groove 112 is provided on the top surface of the fixed seat 106. A rotating ball 113 is provided on the top surface array of the fixed seat 106, and the rotating ball 113 is rollingly connected to the fixed seat 106.

[0039] Specifically, driven by the telescopic cylinder 116, the connecting seat 103 carries the mobile frame 3 to expand and adjust to both sides through the guide column 101 and the guide groove 111. The adjusting ball 119 on the guide column 101 makes the movement of the connecting seat 103 smoother, reducing the friction between the guide column 101 and the guide groove 111. Then, driven by the adjusting motor 117, the bidirectional screw rod 110 will respectively carry the movable plate 105 and the counterweight block 108 on the guide bar 104 to adjust the spacing, which is convenient for adjusting the overall center of gravity of the excavator. The rotating ball 113 is set on the top surface of the fixed seat 106 to reduce the friction between the adapter plate 205 and the fixed seat 106, ensuring the smoothness of the rotation movement.

[0040] The implementation principle of a multi-degree-of-freedom side-swing mini excavator in the first embodiment of the present application is as follows: under the drive of the telescopic cylinder 116, the connecting seat 103 carries the mobile frame 3 to expand and adjust to both sides through the guide column 101 and the guide groove 111, and the adjustment ball 119 on the guide column 101 makes the movement of the connecting seat 103 smoother, reducing the friction between the guide column 101 and the guide groove 111, and then under the drive of the adjustment motor 117, the bidirectional screw rod 110 will respectively carry the movable plate 105 and the counterweight block 108 on the guide bar 104 to adjust the spacing, so that Regarding the adjustment of the overall center of gravity of the excavator, in the adjustment component 1, the connecting seat 103 can extend to both sides of the supporting frame 102 under the action of the telescopic cylinder 116, thereby changing the spacing between the mobile frames 3, and the movable plate 105 and the counterweight block 108 in the adjustment component 1 can be adjusted in spacing under the action of the adjustment motor 117 and the bidirectional screw rod 110, so that the overall center of gravity of the excavator will not change too much. These designs not only improve the flexibility of the excavator, enabling the excavator to adapt to different working environments, but also improve the stability of the excavator during operation.

[0041] Example 2: Reference Figure 1 , Figure 2 , Figure 4 , Figure 8 , Fig. 9 and Fig.10 The side swing assembly 2 includes an adapter plate 205, a limit block 208 is fixed on the bottom surface of the adapter plate 205, and the limit block 208 is rotatably connected to the limit groove 112, a rotating motor 210 is fixed in the adapter plate 205, and the output end of the rotating motor 210 passes through the bottom surface of the adapter plate 205, a transmission gear 207 is fixed at the output end of the rotating motor 210, and the transmission gear 207 is meshed with the gear bar 118, and a fixed frame 204 is provided on the top surface of the adapter plate 205, and a movable seat 203 is provided in the fixed frame 204, and the movable seat 20 3 is rotatably connected to the adapter plate 205, a side swing groove 202 is provided on the top surface of the movable seat 203, and the bottom end of the rotating arm 11 is rotatably connected to the side swing groove 202, a side swing cylinder 201 is provided between the rotating arm 11 and the movable seat 203, and the side swing cylinder 201 is axially symmetrical with respect to the movable seat 203, a surface array of positioning holes 12 is provided on the surface of the rotating arm 11, a positioning cylinder 209 is fixed to the surface of the movable seat 203, a positioning column 206 is provided at the output end of the positioning cylinder 209, and the positioning column 206 is movably connected to the positioning hole 12.

[0042] Specifically, in the side swing assembly 2, the movable seat 203 can rotate forward and backward in the fixed frame 204, so that the excavator can perform frontal excavation operations, and a side swing cylinder 201 is provided between the movable seat 203 and the rotating boom 11. Under the action of the side swing cylinder 201, the rotating boom 11 can swing left and right in the side swing slot 202.

[0043] The implementation principle of a multi-degree-of-freedom side-swing mini excavator in the second embodiment of the present application is as follows: in the side-swing assembly 2, the movable seat 203 can rotate forward and backward in the fixed frame 204, so that the excavator can perform frontal excavation operations, and a side-swing cylinder 201 is provided between the movable seat 203 and the rotating arm 11. Under the action of the side-swing cylinder 201, the rotating arm 11 can swing left and right in the side-swing slot 202. The angle between the adjacent positioning holes 12 on the surface of the rotating arm 11 and the rotation point is 45°. Under the action of the side-swing cylinder 201, the rotating arm 11 can swing left and right by 45°. When the position of the rotating arm 11 is determined in the side swing groove 202, under the action of the positioning cylinder 209, the positioning column 206 will be connected with the positioning hole 12 to realize the positioning of the rotating arm 11, so that the rotating arm 11 is more stable when rotating, and then under the drive of the rotating motor 210, the transmission gear 207 will mesh with the gear bar 118 and rotate, thereby rotating the adapter plate 205. The function of the limit block 208 and the limit groove 112 is to prevent the adapter plate 205 from falling off the adjustment component 1. This design allows the excavator to perform a large range of excavation operations in a small space, thereby improving the working efficiency of the excavator.

[0044] Example 3: Reference Figure 1-Figure 10 A first excavation cylinder 7 is provided between the fixed frame 204 and the rotating arm 11, a movable arm 10 is provided at one end of the rotating arm 11, and the movable arm 10 is rotatably connected to the rotating arm 11, a second excavation cylinder 8 is provided between the rotating arm 11 and the movable arm 10, a bucket 6 is provided at one end of the movable arm 10, and the bucket 6 is rotatably connected to the movable arm 10, a third excavation cylinder 9 is provided between the bucket 6 and the movable arm 10, a control room 4 is fixed to the top surface of the adapter plate 205, and the control room 4 is electrically connected to the adjusting motor 117 and the rotating motor 210 respectively.

[0045] Specifically, under the action of the first excavation cylinder 7, the rotating arm 11 can rotate, under the drive of the second excavation cylinder 8, the movable arm 10 can be extended at one end of the rotating arm 11, and under the action of the third excavation cylinder 9, the bucket 6 can perform excavation operations. In the hydraulic system of the present invention, the controller in the control room 4 communicates with multiple cylinders through a bus to achieve synchronous control of multiple cylinders.

[0046] In summary: in the adjustment component 1, the connecting seat 103 can extend to both sides of the support frame 102 under the action of the telescopic cylinder 116, thereby changing the spacing between the movable frames 3, and the movable plate 105 and the counterweight block 108 in the adjustment component 1 can be adjusted in spacing under the action of the adjustment motor 117 and the bidirectional screw rod 110, so that the overall center of gravity of the excavator will not change too much. These designs not only improve the flexibility of the excavator, enabling the excavator to adapt to different working environments, but also improve the stability of the excavator when working. In the side swing component 2, the movable seat 203 can rotate back and forth in the fixed frame 204, so that the excavator can perform frontal excavation operations, and a side swing cylinder 201 is provided between the movable seat 203 and the rotating boom 11. Under the action of the side swing cylinder 201, the rotating boom 11 can swing left and right in the side swing slot 202. This design enables the excavator to perform a large range of excavation operations in a small space, thereby improving the working efficiency of the excavator.

[0047] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A multi-degree-of-freedom side-swing mini excavator, comprising a mobile frame (3), characterized in that: A movable crawler (5) is embedded on the surface of the movable frame (3); an adjustment component (1) for changing the spacing between the movable frames (3) is provided between the movable frames (3); a rotating arm (11) is provided on the top of the adjustment component (1); a side swing component (2) for swinging the rotating arm (11) left and right is provided between the rotating arm (11) and the adjustment component (1); and the rotating arm (11) is movably connected to the side swing component (2).

2. The multi-degree-of-freedom side-swing mini excavator according to claim 1, characterized in that: The adjustment assembly (1) comprises a support frame (102), the surface array of the support frame (102) is provided with guide grooves (111), the two sides of the support frame (102) are provided with connection seats (103), and the connection seats (103) are respectively fixedly connected to the movable frame (3), the inner side array of the connection seat (103) is provided with guide columns (101), and the guide columns (101) are movably connected to the guide grooves (111), the surface of the guide column (101) is evenly provided with adjustment balls (119), and the adjustment balls (119) are rollingly connected to the guide column (101), and the two sides of the support frame (102) are provided with storage grooves (115), and telescopic oil cylinders (116) are fixed in the storage grooves (115), and the output end of the telescopic oil cylinder (116) is fixedly connected to the connection seat (103).

3. The multi-degree-of-freedom side-swing mini excavator according to claim 2, characterized in that: A guide bar (104) is fixed on the top surface of the support frame (102), and the guide bar (104) is axially symmetrical with respect to the support frame (102). A movable plate (105) and a counterweight (108) are respectively provided on the top surface of the support frame (102), and the movable plate (105) and the counterweight (108) are respectively movably connected to the guide bar (104). The bottom surfaces of the movable plate (105) and the counterweight (108) are respectively provided with movable grooves (109). A fixed block (114) is provided on the top surface of the support frame (102), and a bidirectional screw rod (110) is provided between the fixed blocks (114), and the bidirectional screw rod (110) is respectively threadedly connected to the movable plate (105) and the counterweight (108), and an adjustment motor (117) is fixed to one end of the bidirectional screw rod (110).

4. The multi-degree-of-freedom side-swing mini excavator according to claim 3, characterized in that: A fixed seat (106) is provided on the top surface of the movable plate (105), a rotating groove (107) is provided on the top surface of the fixed seat (106), a gear bar (118) is fixed inside the rotating groove (107), a limiting groove (112) is provided on the top surface of the fixed seat (106), a rotating ball (113) is provided in an array on the top surface of the fixed seat (106), and the rotating ball (113) is rollingly connected to the fixed seat (106).

5. The multi-degree-of-freedom side-swing mini excavator according to claim 4, characterized in that: The side swing assembly (2) comprises an adapter plate (205), a limit block (208) is fixed on the bottom surface of the adapter plate (205), and the limit block (208) is rotatably connected to the limit slot (112), a rotating motor (210) is fixed in the adapter plate (205), and the output end of the rotating motor (210) passes through the bottom surface of the adapter plate (205), and a transmission gear (207) is fixed on the output end of the rotating motor (210), and the transmission gear (207) and the gear bar (118) are meshed with each other.

6. The multi-degree-of-freedom side-swing mini excavator according to claim 5, characterized in that: A fixed frame (204) is provided on the top surface of the adapter plate (205), a movable seat (203) is provided in the fixed frame (204), and the movable seat (203) is rotatably connected to the adapter plate (205), a side swing groove (202) is provided on the top surface of the movable seat (203), and the bottom end of the rotating arm (11) is rotatably connected to the side swing groove (202), a side swing cylinder (201) is provided between the rotating arm (11) and the movable seat (203), and the side swing cylinder (201) is in an axisymmetric structure with respect to the movable seat (203).

7. The multi-degree-of-freedom side-swing mini excavator according to claim 6, characterized in that: The surface array of the rotating arm (11) is provided with positioning holes (12), the surface of the movable seat (203) is fixed with a positioning cylinder (209), the output end of the positioning cylinder (209) is provided with a positioning column (206), and the positioning column (206) is movably connected to the positioning hole (12).

8. The multi-degree-of-freedom side-swing mini excavator according to claim 7, characterized in that: A first excavation cylinder (7) is provided between the fixed frame (204) and the rotating arm (11); a movable arm (10) is provided at one end of the rotating arm (11), and the movable arm (10) is rotatably connected to the rotating arm (11); a second excavation cylinder (8) is provided between the rotating arm (11) and the movable arm (10); a bucket (6) is provided at one end of the movable arm (10), and the bucket (6) is rotatably connected to the movable arm (10); and a third excavation cylinder (9) is provided between the bucket (6) and the movable arm (10).

9. The multi-degree-of-freedom side-swing mini excavator according to claim 8, characterized in that: A control chamber (4) is fixed on the top surface of the adapter plate (205), and the control chamber (4) is electrically connected to the regulating motor (117) and the rotating motor (210) respectively.

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