Low-noise electric miniature excavator

Abstract

The invention relates to the technical field of miniature excavators, and discloses a low-noise electric miniature excavator which comprises a bottom plate fixedly installed at the bottom of a positioning rod, side plates fixedly installed on one side of the surface of the bottom plate and fixedly installed on the two sides of the bottom of an excavator body, and buffer clamping rings and clamping sleeves are arranged on the two sides of the surfaces of the side plates. When rotating clockwise, the buffer clamping ring is movably clamped with the buffer clamping ring, impact generated by swing of the swing arm can be effectively absorbed by means of sliding of the buffer clamping ring in the sliding groove of the fixed block and extrusion of the buffer clamping ring on the buffer spring, noise generated by metal collision is reduced, abrasion caused by structural rigid contact is avoided, and the service life of the swing arm is prolonged. According to the swing arm, the stability in the transmission process is guaranteed, impact generated by swing of the swing arm is absorbed, noise generated by metal collision is reduced, when the swing arm rotates anticlockwise, accurate clamping connection can be achieved through the clamping plate and the clamping sleeve on the surface of the ejector block, abrasion caused by rigid contact of the structure is avoided, the stability in the transmission process is guaranteed, and bidirectional protection on the swing arm is achieved.

Description

Technical Field

[0001] This invention relates to the field of mini excavator technology, specifically a low-noise electric mini excavator. Background Technology

[0002] The low-noise electric mini excavator is a small, environmentally friendly engineering equipment designed for operation in confined spaces and noise-sensitive areas. With an electric drive system at its core, it features a miniaturized body, low-noise operation, and flexible operation. It can easily enter areas that large engineering machinery cannot access, such as indoor decoration sites, renovation sites of old residential areas, courtyard construction, and small-scale municipal pipeline laying.

[0003] As the core load-bearing component, the mounting bracket utilizes a pre-fixed mounting shaft on its back to align with a pre-drilled mounting interface at the bottom front of the excavator body. Bolts, flanges, and other fasteners are used to securely lock the mounting shaft to the body interface, completing the basic fixation of the mounting bracket on the machine body and providing stable support for subsequent component assembly. Next, the rotating shaft is rotatably fitted into the pre-drilled shaft hole at the front end of the mounting bracket, ensuring smooth and unobstructed rotation. Simultaneously, two sets of support seats are rotatably fitted onto the corresponding interfaces on both sides of the bottom front surface of the mounting bracket, symmetrically distributing them. Finally, the snap-fit ​​connector is detachably fitted onto the outer surface of the rotating shaft, ensuring precise alignment between the snap-fit ​​connector and the lower support seat's linkage interface. The cantilever bracket is then movably installed onto the mounting position on the snap-fit ​​connector, completing the full assembly of the front-end working structure with the excavator body.

[0004] Currently, when existing electric mini excavators move the bucket, the boom swings under the excavator body. Because the boom and excavator body are rigidly connected without corresponding noise reduction or buffering structures, a certain amount of shaking occurs after the boom and bucket have swung. At the same time, a loud metallic collision noise is generated when the boom swings to its final position, and the vibration generated by the shaking also causes the excavator body to shake, causing wear and tear on both the boom and the excavator body. This can lead to damage to the boom and thus affect the overall service life of the electric mini excavator.

[0005] Therefore, this invention proposes a low-noise electric mini excavator to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a low-noise electric mini excavator to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a low-noise electric mini excavator, comprising a mounting frame, a rotating shaft, and a support base, wherein the rotating shaft is rotatably sleeved on the front end of the mounting frame surface, and the support base is rotatably sleeved on both sides of the bottom front end surface of the mounting frame.

[0008] The mounting bracket has a mounting shaft fixedly installed on the back. The mounting shaft is fixedly installed at the bottom front end of the excavator body. A snap-fit ​​seat is detachably fitted onto the outer surface of the rotating shaft. A cantilever bracket is movably installed on the surface of the snap-fit ​​seat.

[0009] A sleeve rod is fixedly sleeved around the surface of the support base. A swing arm is telescopically installed on one side of the sleeve rod. A connecting rod is fixedly connected to one side of the swing arm. A clamping plate is fixedly connected to one side of the connecting rod. A positioning rod is rotatably sleeved at the center of the swing arm. A base plate is fixedly installed at the bottom of the positioning rod. A side plate is fixedly installed on one side of the base plate. The side plates are fixedly installed on both sides of the bottom of the excavator body. Buffer clamps and clamping sleeves are provided on both sides of the side plate.

[0010] Preferably, connecting shafts are fixedly installed on both sides of the bottom surface of the snap-fit ​​seat, with the bottom of the connecting shafts perpendicular to the surface of the support seat and sleeved on the top surface of the sleeve rod.

[0011] Preferably, a fixing block is fixedly installed at both ends on one side of the side plate surface, a groove is opened at the center of one side of the fixing block surface, a slider is slidably installed on the groove surface, one side of the slider surface is fixedly connected to one side of the buffer clamping ring surface, and a buffer spring is fixedly installed on one side of the buffer clamping ring surface.

[0012] Preferably, the swing arm is adjusted by swinging on the side plate surface via a sleeve rod, and is engaged with the buffer clamp surface by swinging.

[0013] Preferably, a guide rail is fixedly installed on the other side of the side plate surface, a slide plate is slidably installed at the center of the guide rail surface, return springs are fixedly connected to both sides of the slide plate surface, a top block is fixedly installed on the top of the slide plate, and a retainer is fixedly installed on the surface of the top block.

[0014] Preferably, the swing arm is adjusted by swinging on the side plate surface via a sleeve rod, the positioning rod swings and engages with the rotating sleeve, and is adjusted by sliding on the guide rail surface via a slide plate and a return spring.

[0015] Preferably, the swing arm is limited and engaged by a positioning rod, and swings and adjusts with the positioning rod as the center.

[0016] Preferably, the swing arm rotates clockwise and engages with the surface of the buffer clamp ring; the swing arm rotates counterclockwise and engages with the clamping plate and the sleeve. During clockwise rotation, it engages with the buffer clamp ring. The sliding of the buffer clamp ring within the groove of the fixed block and the compression of the buffer spring effectively absorb the impact generated by the swing arm's swing, reducing noise from metal-on-metal collisions and preventing wear caused by rigid structural contact, thus ensuring the smoothness of the transmission process. During counterclockwise rotation, the swing arm can achieve precise engagement with the sleeve on the surface of the top block via the clamping plate. The sliding of the slide plate on the guide rail surface and the elastic support of the return spring provide the top block with flexible position adjustment capabilities, ensuring stable engagement between the sleeve and the clamping plate. Furthermore, it absorbs the impact generated by the swing arm's swing, reducing noise from metal-on-metal collisions.

[0017] Preferably, there are two sets of support seats, which are symmetrically distributed on both sides of the bottom surface of the front end of the mounting frame, and the two sets of support seats are adjusted synchronously on the surface of the rotating shaft by means of a snap-fit ​​seat.

[0018] Preferably, the buffer clamp is pressed by the swing arm, slides and adjusts on the surface of the fixed block, and is pressed by contact with the surface of the buffer spring.

[0019] Compared with the prior art, the beneficial effects of the present invention are: The low-noise electric mini excavator proposed in this invention achieves a stable connection with the bottom front end of the excavator body through a mounting frame and mounting shaft. The rotating shaft at the front end of the surface can achieve quick assembly and disassembly and angle adjustment of the cantilever bracket through a snap-fit ​​seat. Two sets of symmetrically distributed support seats can be synchronously rotated and adjusted with the rotating shaft through the connecting shaft at the bottom of the snap-fit ​​seat and the sleeve top of the sleeve, forming balanced support for the front end of the mounting frame and avoiding structural shaking due to uneven force during operation.

[0020] The swing arm can be flexibly switched between limit modes according to the working posture by swinging the sleeve rod on the side plate surface. When it rotates clockwise, it engages with the buffer clamp ring. By sliding the buffer clamp ring in the groove of the fixed block and squeezing the buffer spring, the impact generated by the swing arm swing can be effectively absorbed, which reduces the noise generated by metal collision and avoids wear caused by rigid contact of the structure, thus ensuring the smoothness of the transmission process.

[0021] When the swing arm rotates counterclockwise, it can be precisely engaged with the clamping plate and the sleeve on the surface of the top block. The sliding of the slide plate on the guide rail surface and the elastic support of the return spring not only provide the top block with flexible position adjustment capability and ensure the stable engagement of the clamping plate and the sleeve, but also absorb the impact generated by the swing arm swing, reduce the noise generated by metal collision, avoid wear caused by rigid contact of the structure, ensure the smoothness of the transmission process, and achieve two-way protection for the swing arm. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the connection structure of the mounting bracket, rotating shaft, snap-fit ​​seat and cantilever bracket of the present invention; Figure 2 This is a schematic diagram of the connection structure of the support base, sleeve rod, and swing arm of the present invention; Figure 3 This is a schematic diagram of the connection structure of the side plate, fixing block and buffer clamp ring of the present invention; Figure 4 for Figure 3 Enlarged structural diagram at point A; Figure 5 This is a schematic diagram of the connection structure of the swing arm, positioning rod, clamping plate, and clamping sleeve of the present invention; Figure 6 for Figure 5 A magnified structural diagram at point B in the middle.

[0023] In the diagram: 100, mounting bracket; 101, mounting shaft; 102, rotating shaft; 103, snap-fit ​​seat; 104, cantilever bracket; 105, connecting shaft; 200. Support base; 201. Sleeve rod; 202. Swing arm; 203. Side plate; 204. Fixing block; 205. Buffer clamp; 206. Slide groove; 207. Buffer spring; 208. Positioning rod; 209. Base plate; 210. Connecting rod; 211. Clamping plate; 212. Clamping sleeve; 213. Guide rail; 214. Slide plate; 215. Return spring; 216. Top block. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Please see Figure 1 The low-noise electric mini excavator includes a mounting frame 100, a rotating shaft 102, and a support base 200. The rotating shaft 102 is rotatably sleeved on the front end of the surface of the mounting frame 100, and the support base 200 is rotatably sleeved on both sides of the bottom surface of the front end of the mounting frame 100.

[0026] Mounting bracket 100 has mounting shaft 101 fixedly mounted on the back. Mounting shaft 101 is fixedly mounted on the bottom front end of excavator body. Rotating shaft 102 has a snap-fit ​​seat 103 detachably sleeved on its outer surface. Cantilever bracket 104 is movably mounted on the surface of snap-fit ​​seat 103.

[0027] Connecting shafts 105 are fixedly installed on both sides of the bottom surface of the snap-fit ​​seat 103. The bottom of the connecting shaft 105 is perpendicular to the surface of the support seat 200 and is sleeved on the top surface of the sleeve rod 201.

[0028] There are two sets of support seats 200. The two sets of support seats 200 are symmetrically distributed on both sides of the bottom surface of the front end of the mounting frame 100, and the two sets of support seats 200 are adjusted synchronously on the surface of the rotating shaft 102 through the snap-fit ​​seat 103.

[0029] Before operation, the cantilever bracket 104 is movably mounted on the surface of the snap-fit ​​seat 103. Then, the snap-fit ​​seat 103 is detachably fitted onto the outer surface of the rotating shaft 102 at the front end of the mounting frame 100, completing the rapid assembly of the cantilever bracket 104. Simultaneously, the connecting shafts 105 on both sides of the bottom of the snap-fit ​​seat 103 are perpendicularly aligned with the surfaces of the two sets of support seats 200 symmetrically distributed on both sides of the bottom front end of the mounting frame 100, and are fitted onto the top of the sleeve rod 201 of the support seat 200, creating a mechanical linkage between the snap-fit ​​seat 103 and the two sets of support seats 200. When it is necessary to adjust the working angle of the cantilever bracket 104, it can be adjusted via the external... The force drives the locking seat 103 to rotate around the rotating shaft 102. Since the two sets of support seats 200 are linked to the rotating shaft 102 through the locking seat 103, when the locking seat 103 rotates, it will synchronously drive the two sets of support seats 200 to rotate synchronously around the bottom front end of the mounting frame 100. The support seat 200 provides balanced support for the locking seat 103 through the sleeve rod 201 and the connecting shaft 105, so as to prevent the locking seat 103 and the cantilever bracket 104 from tilting or shaking during the rotation, and ensure that the cantilever bracket 104 can maintain a stable posture at different working angles and complete the operation.

[0030] Please see Figure 2 , Figures 5-6 A sleeve rod 201 is fixedly sleeved around the surface of the support base 200. A swing arm 202 is telescopically installed on one side of the sleeve rod 201. A connecting rod 210 is fixedly connected to one side of the swing arm 202. A clamping plate 211 is fixedly connected to one side of the connecting rod 210. A positioning rod 208 is rotatably sleeved at the center of the surface of the swing arm 202. A base plate 209 is fixedly installed at the bottom of the positioning rod 208. A side plate 203 is fixedly installed on one side of the surface of the base plate 209. The side plates 203 are fixedly installed on both sides of the bottom of the excavator body. Buffer clamping rings 205 and clamping sleeves 212 are provided on both sides of the surface of the side plates 203.

[0031] The swing arm 202 is adjusted by swinging on the surface of the side plate 203 via the sleeve rod 201. The positioning rod 208 swings and rotates and engages with the sleeve 212, and is adjusted by sliding on the surface of the guide rail 213 via the slide plate 214 and the return spring 215.

[0032] A guide rail 213 is fixedly installed on the other side of the side plate 203. A slide plate 214 is slidably installed at the center of the surface of the guide rail 213. Return springs 215 are fixedly connected to both sides of the surface of the slide plate 214. A top block 216 is fixedly installed on the top of the slide plate 214. A retainer 212 is fixedly installed on the surface of the top block 216.

[0033] In use, the external force drives the swing arm 202 to swing and adjust on the surface of the side plate 203 with the sleeve rod 201 as the fulcrum. When the swing arm 202 swings counterclockwise, it drives the locking plate 211 to move closer to the locking sleeve 212 on the other side of the side plate 203 through the connecting rod 210. At this time, the top block 216 where the locking sleeve 212 is located pushes the slide plate 214 to slide on the guide rail 213 on the surface of the side plate 203 as the positioning rod 208 swings and squeezes. The return springs 215 on both sides of the slide plate 214 are compressed and store elastic potential energy until the locking plate 211 and the locking sleeve 212 rotate and engage, realizing the stable limit after the swing arm 202 swings counterclockwise. When it is necessary to release the limit, the swing arm 202 is driven in the opposite direction, the return spring 215 releases elastic potential energy and pushes the slide plate 214 to return along the guide rail 213. The top block 216 drives the locking sleeve 212 to disengage from the locking plate 211, and the swing arm 202 can swing and adjust again through the sleeve rod 201.

[0034] Please see Figures 2-4 A fixing block 204 is fixedly installed at both ends on one side of the side plate 203. A sliding groove 206 is opened at the center of one side of the fixing block 204. A slider is slidably installed on the surface of the sliding groove 206. One side of the slider is fixedly connected to one side of the buffer clamp 205. A buffer spring 207 is fixedly installed on one side of the buffer clamp 205.

[0035] The buffer clamp 205 is pressed by the swing arm 202, slides and adjusts on the surface of the fixed block 204, and is pressed by the buffer spring 207.

[0036] The swing arm 202 swings and adjusts on the surface of the side plate 203 via the sleeve rod 201, and swings and engages with the surface of the buffer clamp 205.

[0037] In use, when the swing arm 202 swings clockwise around the side plate 203 with the sleeve rod 201 as the fulcrum, the swing arm 202 gradually approaches the buffer clamp 205 and eventually swings and engages with its surface. At the moment of contact and compression, the buffer clamp 205 is pushed by the swing arm 202, causing the slider to slide along the slide groove 206 towards the inside of the fixed block 204, simultaneously compressing the buffer spring 207 on one side. The buffer spring 207 absorbs the impact force generated by the swing arm 202 through its own deformation, which not only avoids rigid collision between the swing arm 202 and metal parts such as the side plate 203, reducing the noise generated by mechanical contact, but also provides a stable clamping limit for the swing arm 202 through elastic reaction force, preventing the swing arm 202 from loosening or shifting during operation.

[0038] The swing arm 202 is limited and engaged by the positioning rod 208, and swings and adjusts with the positioning rod 208 as the center. When the swing arm 202 rotates clockwise, it is engaged with the surface of the buffer clamp ring 205. When the swing arm 202 rotates counterclockwise, it is engaged with the sleeve 212 through the clamping plate 211.

[0039] The buffer clamp 205 and the retaining sleeve 212 are provided here so that the swing arm 202 can swing around the positioning rod 208 as the center. The positioning rod 208 provides a stable swing fulcrum and basic limit for the swing arm 202. When the swing arm 202 rotates clockwise, it will gradually approach the buffer clamp 205 on the surface of the side plate 203 and engage with it. At this time, the buffer clamp 205 compresses the buffer spring 207 under the pressure of the swing arm 202. The buffer spring 207 absorbs the impact force of the swing arm 202 through elastic deformation, which not only avoids the noise generated by the rigid collision of metal parts, but also achieves flexible limit of the clockwise posture of the swing arm 202 by means of elastic reaction force, preventing the swing arm 202 from swinging. The arm 202 swings too much, causing the entire machine body to shake. When the arm 202 rotates counterclockwise, the arm 202 drives the locking plate 211 to move synchronously through the connecting rod 210. The locking plate 211 gradually approaches and engages with the locking sleeve 212 on the surface of the top block 216. During this process, the locking sleeve 212 moves along the guide rail 213 with the top block 216, driving the sliding plate 214 to slide and compress the return spring 215. The supporting force of the return spring 215 can strengthen the locking tightness between the locking sleeve 212 and the locking plate 211, achieving rigid limitation of the counterclockwise posture of the arm 202, ensuring the positional stability of the arm 202 under heavy load operation, and achieving bidirectional protection for the arm 202.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-noise electric mini excavator, comprising a mounting frame (100), a rotating shaft (102), and a support base (200), wherein the rotating shaft (102) is rotatably sleeved on the front end of the surface of the mounting frame (100), and the support base (200) is rotatably sleeved on both sides of the bottom surface of the front end of the mounting frame (100); Its features are: The mounting bracket (100) has a mounting shaft (101) fixedly mounted on its back. The mounting shaft (101) is fixedly mounted on the bottom front end of the excavator body. The outer surface of the rotating shaft (102) is detachably fitted with a snap-fit ​​seat (103). A cantilever bracket (104) is movably mounted on the surface of the snap-fit ​​seat (103). A sleeve rod (201) is fixedly sleeved around the surface of the support base (200). A swing arm (202) is telescopically installed on one side of the sleeve rod (201). A connecting rod (210) is fixedly connected to one side of the swing arm (202). A clamping plate (211) is fixedly connected to one side of the connecting rod (210). A positioning rod (208) is rotatably sleeved at the center of the surface of the swing arm (202). A base plate (209) is fixedly installed at the bottom of the positioning rod (208). A side plate (203) is fixedly installed on one side of the surface of the base plate (209). The side plate (203) is fixedly installed on both sides of the bottom of the excavator body. Buffer clamping rings (205) and clamping sleeves (212) are provided on both sides of the surface of the side plate (203).

2. The low-noise electric mini excavator according to claim 1, characterized in that: Connecting shafts (105) are fixedly installed on both sides of the bottom surface of the snap-fit ​​seat (103). The bottom of the connecting shaft (105) is perpendicular to the surface of the support seat (200) and is sleeved on the top surface of the sleeve rod (201).

3. The low-noise electric mini excavator according to claim 1, characterized in that: The side plate (203) has fixed blocks (204) at both ends on one side of its surface. A groove (206) is provided at the center of one side of the fixed block (204). A slider is slidably installed on the surface of the groove (206). One side of the slider is fixedly connected to one side of the buffer clamp (205). A buffer spring (207) is fixedly installed on one side of the buffer clamp (205).

4. The low-noise electric mini excavator according to claim 3, characterized in that: The swing arm (202) is oscillating and adjusted on the surface of the side plate (203) via the sleeve rod (201), and is oscillating and engaging with the surface of the buffer clamp (205).

5. The low-noise electric mini excavator according to claim 1, characterized in that: A guide rail (213) is fixedly installed on the other side of the side plate (203). A slide plate (214) is slidably installed at the center of the surface of the guide rail (213). Return springs (215) are fixedly connected to both sides of the surface of the slide plate (214). A top block (216) is fixedly installed on the top of the slide plate (214). The sleeve (212) is fixedly installed on the surface of the top block (216).

6. The low-noise electric mini excavator according to claim 5, characterized in that: The swing arm (202) is oscillating on the surface of the side plate (203) via the sleeve rod (201), the positioning rod (208) swings and engages with the ferrule (212) by rotation, and slides on the surface of the guide rail (213) via the slide plate (214) and the return spring (215).

7. The low-noise electric mini excavator according to claim 1, characterized in that: The swing arm (202) is limited and locked by the positioning rod (208), and swings and adjusts with the positioning rod (208) as the center.

8. The low-noise electric mini excavator according to claim 7, characterized in that: The swing arm (202) rotates clockwise and engages with the surface of the buffer clamp (205). The swing arm (202) rotates counterclockwise and engages with the sleeve (212) through the clamp plate (211).

9. The low-noise electric mini excavator according to claim 1, characterized in that: The support base (200) is provided in two sets. The two sets of support bases (200) are symmetrically distributed on both sides of the bottom surface of the front end of the mounting frame (100), and the two sets of support bases (200) are synchronously rotated and adjusted on the surface of the rotating shaft (102) through the snap-fit ​​seat (103).

10. The low-noise electric mini excavator according to claim 3, characterized in that: The buffer clamp (205) is pressed by the swing arm (202), slides and adjusts on the surface of the fixed block (204), and is pressed by the surface of the buffer spring (207).

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