Miniature excavator caterpillar band guide wheel device capable of rapidly adjusting tension degree

Abstract

The invention relates to the technical field of guide wheels, in particular to a miniature excavator track guide wheel device capable of quickly adjusting tension degree, which comprises a guide wheel body, the guide wheel body is rotatably connected to the inner side of a limiting frame, one end of the limiting frame is sleeved with a mounting frame, a traction frame is fixed at one end of the limiting frame, and an electric telescopic rod is fixed on the surface of the mounting frame. One end of the electric telescopic rod is fixed on the surface of the traction frame; the guide wheel has the beneficial effects that by arranging the mounting frame, the traction frame and the electric telescopic rod, the position of the guide wheel body is rapidly adjusted. When the tightness of the crawler belt needs to be adjusted, the guide wheel body can be driven to tension or loosen the crawler belt only by starting the electric telescopic rod and driving the piston rod to extend or retract, the operation is simple, convenient and rapid, the adjusting time and the labor cost are greatly saved, and the working efficiency of the excavator is improved.

Description

Mini excavator track guide wheel device with quick-adjustable tension Technical Field

[0001] This invention relates to the field of guide wheels, specifically to a guide wheel device for mini excavator tracks that allows for rapid tension adjustment. Background Technology

[0002] During the use of mini excavators, track tension has a crucial impact on the normal operation and service life of the equipment. Appropriate track tension ensures stable operation of the excavator under various working conditions, reduces abnormal wear between the tracks and guide wheels, and lowers the failure rate.

[0003] However, traditional mini excavator track guide wheel devices present several inconveniences when adjusting track tension. Firstly, the adjustment process is typically cumbersome, requiring significant time and manpower. It may involve multiple tools and steps to adjust the tension, impacting the excavator's efficiency. Secondly, traditional guide wheel devices lack effective surface cleaning mechanisms. During excavator operation, the guide wheel surface easily accumulates large amounts of particles and debris, such as mud and gravel. If these deposits are not cleaned promptly, they accelerate wear, affecting normal rotation and consequently impacting track stability, potentially leading to serious problems like track derailment. Furthermore, when adjusting the guide wheel position to change track tension, the guide wheel is prone to misalignment, lacking effective anti-misalignment measures. This not only affects the accuracy of tension adjustment but may also damage the excavator's overall structure.

[0004] Therefore, developing a mini excavator track guide wheel device that can quickly adjust tension, has surface particulate cleaning function, and effectively prevents deviation and limits movement is of great practical significance. Summary of the Invention

[0005] The purpose of this invention is to provide a mini excavator track guide wheel device with rapidly adjustable tension, in order to solve the problems mentioned in the background art.

[0006] To achieve the above object, the present invention provides the following technical solution: a track idler device for a mini-excavator with quickly adjustable tension, including an idler body, the idler body is rotatably connected inside a limit frame, one end of the limit frame is sleeved with a mounting frame, one end of the limit frame is fixed with a traction frame, an electric telescopic rod is fixed on the surface of the mounting frame, and one end of the electric telescopic rod is fixed on the surface of the traction frame; a cleaning plate is inserted into one end of the limit frame, and the bristles of the cleaning plate contact the idler body; sliders are fixed on both sides of the traction frame, the sliders are slidably connected to the side plates of the mounting frame, a micro-electric push rod is embedded inside the slider, and one end of the micro-electric push rod is fixed with a positioning block, and the positioning block is inserted into the side plate of the mounting frame.

[0007] Preferably, the limit frame is in a "U"-shaped plate structure, reserved openings are provided on both parallel side plates of the limit frame, the reserved openings are "convex"-shaped round openings, a limit shaft is inserted into the two reserved openings, the limit shaft is a "T"-shaped cylinder, a limit sleeve is sleeved on one end of the limit shaft, the limit sleeve is an annular plate with a "匚"-shaped cross-section, and a plurality of connecting screws are screwed on the inner ring plate of the limit sleeve, and the connecting screws penetrate through the inner ring plate of the limit sleeve and are screwed on the surface of the limit shaft.

[0008] Preferably, an installation opening is provided at one end of the limit frame, the cleaning plate is inserted into the installation opening, a notch is provided at one end of the cleaning plate away from the bristles, an elastic rubber band is fixed inside the notch, and both ends of the elastic rubber band are respectively fixed on the surface of the limit frame on both sides of the installation opening. The cleaning plate stretches the elastic rubber band to generate elastic deformation, and the elastic rubber band rebounds to pull the cleaning plate to rebound towards the idler body.

[0009] Preferably, the mounting frame is in a "U"-shaped plate structure, and a spring is sleeved outside the electric telescopic rod, and the spring is fixed between the mounting frame and the traction frame.

[0010] Preferably, the traction frame is in a "匚"-shaped plate structure, and the distance between the side plate of the traction frame and the limit frame is greater than the width of the cleaning plate.

[0011] Preferably, guide grooves are provided on both parallel side plates of the mounting frame, the sliders and the guide grooves correspond one by one, and the sliders are slidably connected in the guide grooves.

[0012] Preferably, an embedding groove is provided on the surface of the slider, the micro-electric push rod is fixed inside the embedding groove, and a plurality of positioning grooves are provided inside the guide groove, and the positioning block is inserted into the positioning groove.

[0013] Preferably, connecting plates are fixed on both the top surface and the bottom surface of the mounting frame, and bolt holes are provided on the surface of the connecting plates.

[0014] Compared with existing technologies, the advantages of this invention are as follows: The mini excavator track guide wheel device with rapidly adjustable tension proposed in this invention achieves rapid adjustment of the guide wheel body position by setting up a mounting frame, a traction frame, and an electric telescopic rod. When it is necessary to adjust the track tension, simply activate the electric telescopic rod to drive the piston rod to extend or retract, which will drive the guide wheel body to tighten or loosen the track. The operation is simple and quick, greatly saving adjustment time and labor costs, and improving the working efficiency of the excavator. At the same time, the spring sleeved on the outside of the electric telescopic rod can play a buffering role during the adjustment process, making the adjustment process smoother and reducing the impact on the device.

[0015] A cleaning plate was designed with bristles that contact the guide wheel body, and a notch and rubber band were provided at one end of the cleaning plate. During the rotation of the guide wheel, the cleaning plate, under the rebound traction of the rubber band, ensures that the bristles remain in close contact with the guide wheel body surface, effectively sweeping away debris adhering to the guide wheel surface. The swept-off debris falls to the ground through the gaps in the track, effectively preventing wear on the guide wheel from particles, extending the service life of the guide wheel, and ensuring smooth track operation.

[0016] Slider blocks are fixed on both sides of the traction frame, and these sliders are slidably connected to guide grooves in the side plates of the mounting frame. Miniature electric push rods are embedded inside the sliders, with a positioning block fixed to one end. Multiple positioning slots are formed inside the guide grooves. When the electric telescopic boom traction limit frame moves the guide wheel body, the slider slides along the guide grooves, ensuring the straightness of the guide wheel's movement and preventing it from deviating. When the guide wheel body moves to the designated position, the miniature electric push rod is activated, and the positioning block inserts into the positioning slot, achieving precise positioning of the guide wheel body. This improves the accuracy of tension adjustment and ensures the normal operation of the excavator. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the structure of the present invention; Figure 2 is a cross-sectional view of the structure at AA in Figure 1; Figure 3 is an enlarged schematic diagram of the structure at B in Figure 2; Figure 4 is an enlarged schematic diagram of the structure at C in Figure 2; Figure 5 is a schematic diagram of the connection structure between the guide wheel body and the limiting frame of the present invention; Figure 6 is a schematic diagram of the cleaning plate structure of the present invention; Figure 7 is a schematic diagram of the mounting frame structure of the present invention.

[0018] In the diagram: 1. Guide wheel body; 2. Limiting frame; 201. Reserved opening; 202. Mounting opening; 203. Traction frame; 3. Limiting shaft; 301. Limiting sleeve; 302. Connecting screw; 4. Cleaning plate; 401. Notch; 402. Rubber band; 5. Mounting bracket; 501. Guide groove; 502. Positioning groove; 503. Connecting plate; 6. Electric telescopic rod; 7. Spring; 8. Slider; 801. Embedding groove; 802. Miniature electric push rod; 803. Positioning block. Detailed Implementation

[0019] In order to clearly and completely describe the purpose, technical solution of the present invention, and make its advantages more clearly understood, the following further details the embodiments of the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all embodiments, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0020] Please refer to FIGS. 1-7. The present invention provides a technical solution: a miniature excavator track idler wheel device capable of quickly adjusting the tension, including an idler wheel body 1. The idler wheel body 1 is rotatably connected inside a limit frame 2. The limit frame 2 is in a "U"-shaped plate structure. Reserved openings 201 are provided on both parallel side plates of the limit frame 2. The reserved openings 201 are "convex"-shaped circular openings. A limit shaft 3 is inserted into the two reserved openings 201. The limit shaft 3 is a "T"-shaped cylinder. A limit sleeve 301 is sleeved at one end of the limit shaft 3. The limit sleeve 301 is an annular plate with a cross-section of "匚". A plurality of connecting screws 302 are screwed on the inner ring plate of the limit sleeve 301. After the connecting screws 302 penetrate the inner ring plate of the limit sleeve 301, they are screwed on the surface of the limit shaft 3.

[0021] The operation of installing the idler wheel body 1 inside the limit frame 2 is as follows: Push the idler wheel body 1 between the two parallel side plates of the limit frame 2, ensure that the reserved opening 201 is aligned with the inner ring opening of the idler wheel body 1. At this time, pass the limit shaft 3 through the inner ring opening of the idler wheel body 1 and the mounting openings 202 on the two side plates of the limit frame 2. Then, sleeve the limit sleeve 301 at one end of the limit shaft 3. Finally, screw the connecting screws 302 on the inner ring plate of the limit sleeve 301 and the end part is screwed on the limit shaft 3. It should be noted that washers are pre-sleeved on the connecting screws 302 during installation to ensure that the connecting screws 302 will not loosen after being tightened.

[0022] In order to quickly adjust the tension of the track by the idler wheel body 1, it is proposed that: An installation frame 5 is sleeved at one end of the limit frame 2. A traction frame 203 is fixed at one end of the limit frame 2. An electric telescopic rod 6 is fixed on the surface of the installation frame 5. One end of the electric telescopic rod 6 is fixed on the surface of the traction frame 203; The installation frame 5 is in a "U"-shaped plate structure. A spring 7 is sleeved outside the electric telescopic rod 6. The spring 7 is fixed between the installation frame 5 and the traction frame 203; When adjusting the tension of the track, just start the electric telescopic rod 6. When the electric telescopic rod 6 drives the piston rod to extend, it带动 the idler wheel body 1 to tighten the track. After the electric telescopic rod 6 drives the piston rod to retract, it带动 the idler wheel body 1 to loosen the track.

[0023] In order to clean the particulate matter adhered to the surface of the guide wheel body 1, the following is proposed: One end of the limit frame 2 is inserted with a cleaning plate 4, and the bristles of the cleaning plate 4 contact the guide wheel body 1; An installation opening 202 is provided at one end of the limit frame 2, and the cleaning plate 4 is inserted into the installation opening 202. A notch 401 is provided at one end of the cleaning plate 4 away from the bristles. An elastic rubber band 402 is fixed inside the notch 401, and both ends of the elastic rubber band 402 are respectively fixed on the surface of the limit frame 2 on both sides of the installation opening 202. The cleaning plate 4 stretches the elastic rubber band 402 to generate elastic deformation, and the elastic rubber band 402 rebounds to pull the cleaning plate 4 back towards the guide wheel body 1; The traction frame 203 is in a "C"-shaped plate structure, and the distance between the side plates of the traction frame 203 and the limit frame 2 is greater than the width of the cleaning plate 4. After the cleaning plate 4 is pulled back by the elastic rubber band 402, the bristles contact the guide wheel body 1, sweeping off the debris adhered to the surface of the guide wheel body 1, and the swept-off debris falls to the ground through the gaps of the crawler belt.

[0024] In order to achieve anti-deviation limit when guiding the movement of the guide wheel body 1, the following is proposed: Sliders 8 are fixed on both sides of the traction frame 203, and the sliders 8 are slidably connected to the side plates of the installation frame 5. A micro electric push rod 802 is embedded inside the slider 8, and a positioning block 803 is fixed at one end of the micro electric push rod 802, and the positioning block 803 is inserted into the side plate of the installation frame 5; Guide grooves 501 are provided on both side plates of the installation frame 5 distributed in parallel, and the sliders 8 and the guide grooves 501 correspond one by one, and the sliders 8 are slidably connected in the guide grooves 501; An embedding groove 801 is provided on the surface of the slider 8, and the micro electric push rod 802 is fixed inside the embedding groove 801. A plurality of positioning grooves 502 are provided inside the guide groove 501, and the positioning block 803 is inserted into the positioning grooves 502; Connection plates 503 are fixed on both the top surface and the bottom surface of the installation frame 5, and bolt holes are provided on the surface of the connection plates 503.

[0025] When the electric telescopic rod 6 pulls the limit frame 2 to drive the guide wheel body 1 to move, the sliders 8 on both sides of the traction frame 203 slide along the guide grooves 501. When the guide wheel body 1 moves to the designated position, the switch of the micro electric push rod 802 is triggered, and the piston rod of the micro electric push rod 802 extends and pushes the positioning block 803 to insert into the positioning groove 502, realizing the positioning of the guide wheel body 1.

[0026] Usage method of the track idler device of a micro-excavator with quick tension adjustment: Push the idler wheel body 1 between the two parallel side plates of the limit frame 2, ensuring that the reserved opening 201 on the side plate of the limit frame 2 is aligned with the inner ring opening of the idler wheel body 1. Pass the limit shaft 3 through the inner ring opening of the idler wheel body 1 and the mounting openings 202 on the two side plates of the limit frame 2. Sleeve the limit sleeve 301 on one end of the limit shaft 3. The limit sleeve 301 is a circular ring plate with a "C" - shaped cross - section. After pre - sleeving a gasket on the connecting screw 302, thread it onto the inner ring plate of the limit sleeve 301 and thread its end onto the limit shaft 3, ensuring that the connecting screw 302 will not loosen after being tightened. Sleeve the mounting frame 5 on one end of the limit frame 2. Fix the traction frame 203 at one end of the limit frame 2. Fix the electric telescopic rod 6 on the surface of the mounting frame 5. One end of the electric telescopic rod 6 is fixed on the surface of the traction frame 203. Sleeve the spring 7 outside the electric telescopic rod 6. The spring 7 is fixed between the mounting frame 5 and the traction frame 203. When it is necessary to tension the track, start the electric telescopic rod 6, drive the piston rod to extend,带动 the limit frame 2 and the idler wheel body 1 to move, and tension the track. When it is necessary to loosen the track, start the electric telescopic rod 6, drive the piston rod to retract,带动 the limit frame 2 and the idler wheel body 1 to move, and loosen the track. An installation opening 202 is provided at one end of the limit frame 2. Insert the cleaning plate 4 into the installation opening 202. The bristles of the cleaning plate 4 contact the idler wheel body 1. A notch 401 is provided at one end of the cleaning plate 4 away from the bristles. An elastic belt 402 is fixed inside the notch 401. The two ends of the elastic belt 402 are respectively fixed on the surface of the limit frame 2 on both sides of the installation opening 202. The cleaning plate 4 stretches the elastic belt 402 to produce elastic deformation, and the elastic belt 402 rebounds to牵引 the cleaning plate 4 to rebound towards the idler wheel body 1,使 the bristles contact the idler wheel body 1, sweep off the debris adhered to the surface of the idler wheel body 1, and the swept - off debris falls to the ground through the gaps of the track. Sliders 8 are fixed on both sides of the traction frame 203. The sliders 8 are slidably connected to the side plates of the mounting frame 5. A micro - electric push rod 802 is embedded inside the slider 8. One end of the micro - electric push rod 802 is fixed with a positioning block 803. Guide grooves 501 are provided on the two parallel side plates of the mounting frame 5. The sliders 8 and the guide grooves 501 correspond one by one, and the sliders 8 are slidably connected in the guide grooves 501. An embedding groove 801 is provided on the surface of the slider 8. The micro - electric push rod 802 is fixed inside the embedding groove 801. Multiple positioning grooves 502 are provided inside the guide groove 501. The positioning block 803 can be inserted into the positioning groove 502. Connecting plates 503 are fixed on both the top and bottom surfaces of the mounting frame 5. Bolt holes are provided on the surface of the connecting plates 503. When the electric telescopic rod 6牵引 the limit frame 2 to带动 the idler wheel body 1 to move, the sliders 8 on both sides of the traction frame 203 slide along the guide grooves 501. When the idler wheel body 1 moves to the specified position, trigger the switch of the micro - electric push rod 802. After the piston rod of the micro - electric push rod 802 extends, it pushes the positioning block 803 to insert into the positioning groove 502,实现 the positioning of the idler wheel body 1.

[0027] 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 mini excavator track guide wheel device with adjustable tension, comprising a guide wheel body (1), characterized in that: The guide wheel body (1) is rotatably connected to the inner side of the limit frame (2). One end of the limit frame (2) is sleeved with an installation frame (5). One end of the limit frame (2) is fixed with a traction frame (203). The surface of the installation frame (5) is fixed with an electric telescopic rod (6). One end of the electric telescopic rod (6) is fixed to the surface of the traction frame (203). One end of the limit frame (2) is inserted with a cleaning plate (4). The bristles of the cleaning plate (4) contact the guide wheel body (1). Sliders (8) are fixed on both sides of the traction frame (203). The sliders (8) are slidably connected to the side plates of the installation frame (5). A micro electric push rod (802) is embedded in the slider (8). One end of the micro electric push rod (802) is fixed with a positioning block (803). The positioning block (803) is inserted into the side plate of the installation frame (5).

2. The micro excavator track guide wheel device with rapidly adjustable tension according to claim 1, characterized in that: The limit frame (2) is in a "U"-shaped plate structure. Reserved openings (201) are provided on both of the two parallel side plates of the limit frame (2). The reserved openings (201) are "convex"-shaped round openings. A limit shaft (3) is inserted into the two reserved openings (201). The limit shaft (3) is in a "T"-shaped cylinder. A limit sleeve (301) is sleeved on one end of the limit shaft (3). The limit sleeve (301) is an annular plate with a cross-section of "匚" shape. A plurality of connecting screws (302) are screwed on the inner ring plate of the limit sleeve (301). The connecting screws (302) penetrate through the inner ring plate of the limit sleeve (301) and are screwed on the surface of the limit shaft (3).

3. The micro excavator track guide wheel device with rapidly adjustable tension according to claim 1, characterized in that: An installation opening (202) is provided at one end of the limit frame (2). The cleaning plate (4) is inserted into the installation opening (202). A notch (401) is provided at one end of the cleaning plate (4) away from the bristles. An elastic rubber belt (402) is fixed inside the notch (401). Both ends of the elastic rubber belt (402) are respectively fixed to the surfaces of the limit frame (2) on both sides of the installation opening (202). The cleaning plate (4) stretches the elastic rubber belt (402) to generate elastic deformation. The elastic rubber belt (402) rebounds to pull the cleaning plate (4) to rebound towards the guide wheel body (1).

4. The micro excavator track guide wheel device with rapidly adjustable tension according to claim 1, characterized in that: The installation frame (5) is in a "U"-shaped plate structure. A spring (7) is sleeved outside the electric telescopic rod (6). The spring (7) is fixed between the installation frame (5) and the traction frame (203).

5. The micro excavator track guide wheel device with rapidly adjustable tension according to claim 1, characterized in that: The traction frame (203) is in a "匚"-shaped plate structure. The distance between the side plate of the traction frame (203) and the limit frame (2) is greater than the width of the cleaning plate (4).

6. The micro excavator track guide wheel device with rapidly adjustable tension according to claim 1, characterized in that: Guide grooves (501) are provided on both of the two parallel side plates of the installation frame (5). The sliders (8) and the guide grooves (501) correspond to each other. The sliders (8) are slidably connected in the guide grooves (501).

7. The micro excavator track guide wheel device with rapidly adjustable tension according to claim 6, characterized in that: An embedding groove (801) is provided on the surface of the slider (8). The micro electric push rod (802) is fixed inside the embedding groove (801). A plurality of positioning grooves (502) are provided inside the guide groove (501). The positioning block (803) is inserted into the positioning grooves (502).

8. The mini excavator track guide wheel device with rapidly adjustable tension according to claim 1, characterized in that: Connection plates (503) are fixed on both the top surface and the bottom surface of the installation frame (5). Bolt holes are provided on the surfaces of the connection plates (503).

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