Turntable of trencher

Abstract

The present invention discloses a turntable of a trencher, comprising a circular ring, a tool and a fixed shaft, wherein the circumference of the circular ring is provided with through holes, and a tool is slidably connected in each of the through holes, and the inner ring of the circular ring is provided with a cam, and the cam comprises two parts, a part with a larger diameter being an ejection part, and the other part with a smaller diameter being a recovery part, the ejection part and the recovery part being transitioned by an inclined plane, the ejection part being located at the bottom of the cam, and the recovery part being located at the top of the cam, the ejection part, the recovery part and the circular ring are coaxially arranged, and the inner side of the tool is always in contact with the outer ring of the cam under the action of force, and when the tool is in contact with the ejection part, the working part of the tool is pushed out of the through hole, and when the tool is in contact with the recovery part, the working part of the tool is received in the through hole.

Description

Technical Field

[0001] The invention relates to a turntable of a trencher. Background Art

[0002] A trencher, also known as a trenching machine, is used to create ditches in dirt. While there are many types of trenchers, this application primarily discusses disc trenchers. A disc trencher primarily consists of a carrier and a disc. The disc is typically attached to the front of the carrier via a connecting wall. Grooving cutters are positioned around the disc's circumference, and the carrier is also equipped with a drive mechanism for rotating the disc. During use, the carrier carries the disc forward while the drive mechanism rotates it, dislodging dirt from the ground and creating a trench.

[0003] This type of trencher can only be used to dig trenches on dry land; it struggles with wet, muddy soil. This is primarily due to the strong stickiness of wet soil, which can get stuck in the gaps between the cutters, preventing them from reaching the soil and thus affecting trenching efficiency. Furthermore, soil sticking to the discs increases their weight, placing a strain on the drive mechanism.

[0004] Patent CN201711264024.8 discloses a safety protection device for a trencher, including a frame, a trenching disc and a mud guard device that can adaptively scrape mud; the mud guard device includes an inner arc baffle and an outer arc baffle, the frame includes a vertical beam connected to the middle position of the outer arc baffle, a pair of first slide grooves parallel to each other and arranged in a circumferential direction are provided on the outer arc baffle, each first slide groove is provided with a pair of sliders located on both sides of the vertical beam and connected to the inner arc baffle, the sliders extend outward from the first slide groove to form an extended end, the extended end is connected to the vertical beam through a connecting spring, and clamping parts are provided on both sides of the extended end against the outer arc baffle, a second slide groove is provided on the inner arc baffle in the circumferential direction, and a plurality of mud scraping devices extending from the second slide groove are provided on the outer arc baffle.

[0005] This protective device can remove the mud on the fender to prevent the disc and the fender outside the disc from getting stuck, but this device cannot remove the mud around the disc and cannot solve the problem of the present invention. Summary of the Invention

[0006] In view of the deficiencies in the prior art, the present invention provides a turntable for a trencher, which can effectively remove the adhered soil around the circumference of the disc.

[0007] The present invention is achieved through the following technical solution: a turntable of a trenching machine includes a circular ring, a tool and a fixed shaft, the circular ring is provided with through holes on its circumference, a tool is slidably connected in each through hole, the inner ring of the circular ring is provided with a cam, the cam includes two parts, a part with a larger diameter is a ejection part, and the other part with a smaller diameter is a recovery part, the ejection part and the recovery part are transitioned by an inclined surface, the ejection part is located at the bottom of the cam, and the recovery part is located at the top of the cam, the ejection part, the recovery part and the circular ring are coaxially arranged, the inner side of the tool is always in contact with the outer ring of the cam under the action of force, when the tool contacts the ejection part, the working part of the tool is pushed out of the through hole, when the tool contacts the recovery part, the working part of the tool is received in the through hole, the circular ring also includes a scraper, the scraper is in contact with the outer ring part of the circular ring located at the recovery part, when in use, the circular ring drives the tool to rotate, and the cam is fixed to the carrier through a fixed shaft. As the ring rotates and reaches the ground, the cutter is ejected by the cam at the ejection point, allowing this part of the cutter to dig normally. During trenching, clay will stick to the outer ring. When the ring rotates to the recovery point, the cutter retracts into the through-hole under the action of force, but the clay will still remain on the outer ring. At this point, the outer ring is unobstructed, and the scraper blade on the outer ring can smoothly remove the clay from the ring. This reciprocating process ensures that each time the cutter is just extended out of the through-hole, there is no soil around it, which does not affect digging efficiency.

[0008] In the above technical solution, preferably, baffles are fixed to both end faces of the circular ring, rotatably connected to the fixed shaft, and a sprocket is fixed to one end face of one of the baffles. The baffles and the circular ring form a sealed cavity that encloses the cam, preventing dirt and sand from entering between the cam and the circular ring, which could affect the use of the product.

[0009] In the above technical solution, preferably, the outer ring of the annular ring is provided with a mudguard, and one end of the mudguard is connected to the mud scraper.

[0010] In the above technical solution, preferably, the cutter includes a body, the bottom of which is provided with a roller, which contacts the outer ring of the cam. The addition of the roller reduces friction between the cam and the cutter, thereby reducing the rotational resistance of the ring and preventing wear on the cam and cutter.

[0011] In the above technical solution, preferably, one of the roller or the cam is made of iron, and the other is made of magnetic material. The magnetic force ensures that the tool and the cam are always attracted together.

[0012] In the above technical solution, preferably, the bottom of the tool is provided with stoppers on both sides, and the through hole is provided with grooves on both sides, and the stoppers are inserted into the grooves. The cooperation between the stoppers and the grooves prevents the tool from falling out of the through hole.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: when in use, the circular ring drives the cutter to rotate, and the cam is fixed to the carrier through a fixed axis. When the circular ring rotates, when it rotates to the ground, the cutter is at the ejection part position and is ejected by the cam. This part of the cutter can normally complete the trenching step. When digging trenches, the clay will stick to the outer ring of the circular ring. When the circular ring rotates to the recovery part position, the cutter is retracted into the through hole under the action of force, but the clay will continue to remain on the outer ring of the circular ring. At this time, the outer ring of the circular ring is not blocked, and the scraper located on the outer ring of the circular ring can smoothly hang the clay on the circular ring. This reciprocating process can ensure that every time the cutter just extends out of the through hole, there is no mud around it, which will not affect the excavation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the present invention.

[0015] Figure 2 It is a cross-sectional view of the present invention.

[0016] Figure 3 for Figure 2 A partial enlarged schematic diagram. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0018] See also Figures 1 to 3 The turntable of the trencher includes a ring 1, a tool 2 and a fixed shaft 3. A through hole 11 is provided on the circumference of the ring 1, and a tool 2 is slidably connected in each of the through holes 11.

[0019] The inner ring of the circular ring 1 is provided with a cam 4, and the cam 4 includes two parts, a part with a larger diameter is a protruding part 41, and the other part with a smaller diameter is a recovery part 42. The protruding part and the recovery part are transitioned by an inclined surface 43. The protruding part is located at the bottom of the cam, and the recovery part is located at the top of the cam. The protruding part, the recovery part and the circular ring are coaxially arranged.

[0020] Under the action of force, the inner side of the tool 2 is always in contact with the outer ring of the cam 4. The tool 2 includes a body 21, and a roller 22 is provided at the bottom of the body 21, and the roller is in contact with the outer ring of the cam. After the roller is added, the friction between the cam and the tool is reduced. The rotational resistance of the ring is reduced, and the wear of the cam and the tool is avoided. One of the roller or the cam is made of iron, and the other is made of magnetic material. The magnetic force ensures that the tool and the cam are always adsorbed together. When the tool contacts the ejection part, the working part of the tool is pushed out of the through hole. When the tool contacts the recovery part, the working part of the tool is received in the through hole. The bottom sides of the tool 2 are provided with a baffle 23, and the two sides of the through hole 11 are provided with a groove 12, and the baffle is inserted into the groove. The cooperation between the baffle and the groove prevents the tool from falling out of the through hole.

[0021] Baffles 5 are fixed to both ends of the ring 1, rotatably connected to the fixed shaft 3. A sprocket 51 is fixed to one end of one of the baffles 5. The baffles 5 and the ring 1 form a sealed cavity that encloses the cam, preventing dirt and sand from entering between the cam and the ring, which could affect the product's performance.

[0022] The outer ring of the ring 1 is provided with a fender 6, one end of which is connected to a scraper 61. The scraper is in contact with the outer ring portion of the ring located at the recovery portion.

[0023] During use, the driving mechanism on the carrier drives the baffle to rotate through the chain, and the baffle drives the ring and the cutter to rotate, and the cam is fixed to the carrier through a fixed axis. When the ring rotates, when it rotates to the ground, the cutter is in the ejection position and is ejected by the cam. This part of the cutter can complete the trenching step normally. When digging trenches, the clay will stick to the outer ring of the ring. When the ring rotates to the recovery position, the cutter retracts into the through hole under the action of force, but the clay will continue to remain on the outer ring of the ring. At this time, the outer ring of the ring is not blocked, and the scraper located on the outer ring of the ring can smoothly hang the clay on the ring. This reciprocating process ensures that every time the cutter just extends out of the through hole, there is no mud around it, which will not affect the excavation efficiency.

Claims

1. The turntable of the trencher is characterized by: The tool is provided with a through hole on the circumference of the ring, and a tool is slidably connected in each through hole. The inner ring of the ring is provided with a cam, and the cam includes two parts, a part with a larger diameter is a ejection part, and the other part with a smaller diameter is a recovery part. The ejection part and the recovery part are transitioned by an inclined plane. The ejection part is located at the bottom of the cam, and the recovery part is located at the top of the cam. The ejection part, the recovery part and the ring are coaxially arranged. Under the action of force, the inner side of the tool is always in contact with the outer ring of the cam. When the tool contacts the ejection part, the working part of the tool is pushed out of the through hole. When the tool contacts the recovery part, the working part of the tool is received in the through hole. The tool also includes a scraper, which contacts the outer ring part of the ring located at the recovery part. When in use, the ring drives the tool to rotate, and the cam is fixed to the carrier through a fixed shaft.

2. The turntable of the trencher according to claim 1, characterized in that: Baffles are fixed on both end surfaces of the circular ring, and the baffles are rotatably connected to the fixed shaft. A sprocket is fixed on one end surface of one of the baffles.

3. The turntable of the trencher according to claim 2, characterized in that: The outer ring is provided with a mudguard, and one end of the mudguard is connected to the mud scraper.

4. The turntable of the trencher according to claim 2, characterized in that: The tool comprises a body, a roller is provided at the bottom of the body, and the roller is in contact with the outer ring of the cam.

5. The turntable of the trencher according to claim 4, characterized in that: One of the roller and the cam is made of iron, and the other is made of magnetic material.

6. The turntable of the trencher according to claim 1, characterized in that: Baffles are provided on both sides of the bottom of the tool, and grooves are provided on both sides of the through hole, and the baffles are inserted into the grooves.

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