A ring knife with an assisted ejection

Abstract

The utility model discloses a kind of ring knives of auxiliary ejection, including ring knife body, the ring knife body is equipped with air passage, air passage is close to the side sealing sliding installation of the cutter part of ring knife body in several push rods, and push rod is all arranged along the axial direction, when air passage is connected with external air source, push rod is synchronously stretched out from the side of cutter part along the axial direction, after being ventilated, make push rod stretch out, slightly protrude the hole by reaction force and make ring knife, it is convenient to take out ring knife subsequently.

Description

Technical Field

[0001] This utility model relates to the field of soil extraction tools, and in particular to a ring cutter that assists in ejection. Background Technology

[0002] During soil extraction, for portability and cost considerations, the simplest ring cutter structure is usually used. When using it, you enter the dug pit, find the right depth, and then knock the ring cutter into the pit wall. Finally, you take out the ring cutter to complete the soil extraction.

[0003] The basic ring cutter structure has the problem of being inconvenient to remove during use. The ring cutter often gets stuck in the pit wall, and there is no leverage point. It is necessary to use a shovel or other structurally rigid tools to pry the ring cutter loose or dig it out, which is inconvenient and inefficient. It may also damage the pit wall and affect subsequent soil removal. Utility Model Content

[0004] This invention provides an auxiliary ejection ring cutter, which aims to solve the problems mentioned above, such as the inconvenience of removing existing basic ring cutter structures, their frequent jamming in the pit wall, and the need for tools to remove them.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A ring cutter with auxiliary ejection includes a ring cutter body. The ring cutter body has a venting groove. Several push rods are slidably installed in the venting groove near the cutter side of the ring cutter body, and the push rods are all arranged axially. When the venting groove is connected to an external air source, the push rods extend synchronously from the cutter side axially.

[0006] Preferably, the ventilation groove includes a main pipe located in the ring cutter body on the side away from the cutter head. The side of the main pipe away from the cutter head is connected to the outside through an air inlet. The side of the main pipe near the cutter head is connected to several branch pipes. All branch pipes are arranged radially in the ring cutter body on the side near the cutter head.

[0007] More preferably, the main pipe is an annular pipe, and the main pipe and the ring cutter body share a common central axis.

[0008] Furthermore, the branch pipes are arranged at equal intervals around the central axis of the ring cutter body.

[0009] Furthermore, each branch pipe corresponds to a push rod, and the push rod is slidably installed in the corresponding branch pipe.

[0010] Specifically, the push rod includes a rod body, one end of which is sealed and embedded in the corresponding branch pipe by a sealing ring, and the other end of which extends out of the corresponding branch pipe and is provided with a gasket.

[0011] More specifically, the rod body is provided with sealing grooves on both the top and bottom sides, and sealing rings are fitted and limited in the sealing grooves. The sealing grooves and sealing rings form a sealing fit with the inner wall of the corresponding branch pipes.

[0012] In detail, a spring is provided between the end of the rod away from the gasket and the top of the corresponding branch pipe, and the two ends of the spring are fixed on the rod and inside the branch pipe respectively. The rod forms an elastic limiting fit in the corresponding branch pipe through the spring.

[0013] Preferably, the blades of the ring cutter body are spaced apart, with each space corresponding to a push rod, and the push rod is located at the corresponding space.

[0014] Preferably, the outer edge of the opening on the side of the ring cutter body away from the cutter head is provided around the axis.

[0015] The beneficial effects of this utility model are: The device extends the push rod by venting and presses it against the pit wall. Under the reaction force of the push rod, the ring cutter body is ejected from the pit wall a certain distance. At this time, the operator only needs to pull out the ring cutter, breaking the state of being stuck in the pit wall, giving the operator a point of leverage, improving the efficiency of removing the ring cutter, and under the influence of the pit wall, there is no need to contact other tools, thus improving the soil removal efficiency. The device has a simple overall structure, low cost, is easy to carry, and is easy to promote and use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the top structure of this utility model; Figure 2 This is a schematic diagram of the bottom structure of this utility model; Figure 3 This is a schematic diagram of the ventilation groove of this utility model; Figure 4 This is a cross-sectional schematic diagram of the branch pipe of this utility model; In the diagram: 1. Ring cutter body; 101. Cutting tool; 102. Outer edge; 2. Ventilation duct; 201. Air inlet; 202. Main pipe; 203. Branch pipe; 3. Push rod; 301. Rod body; 302. Sealing groove; 303. Gasket.

[0017] 4. Spring; 5. Sealing ring. Detailed Implementation

[0018] The embodiments will be further described below with reference to the accompanying drawings.

[0019] like Figures 1-4As shown in the preferred embodiment 1, an auxiliary ejection ring cutter includes a ring cutter body 1. The ring cutter body 1 is provided with a ventilation groove 2. Several push rods 3 are sealed and slidably installed in the ventilation groove 2 near the cutter part 101 of the ring cutter body 1. All push rods 3 are arranged axially. When the ventilation groove 2 is connected to an external air source, the push rods 3 extend synchronously from the cutter part 101 along the axial direction.

[0020] The device allows air to be supplied to the ventilation slot 2, causing the push rod 3 to extend and press against the pit wall. Under the reaction force of the push rod 3, the ring cutter body 1 is ejected from the pit wall a certain distance in the opposite direction. At this time, the operator only needs to pull out the ring cutter, breaking the state of being stuck in the pit wall, providing the operator with a point of leverage, improving the efficiency of removing the ring cutter, and under the influence of the pit wall, there is no need to contact other tools, thus improving the soil removal efficiency.

[0021] In a preferred embodiment 2, the ventilation groove 2 includes a main pipe 202 located inside the ring cutter body 1 on the side away from the cutter head 101. The side of the main pipe 202 away from the cutter head 101 is connected to the outside through an air inlet 201. The side of the main pipe 202 near the cutter head 101 is connected to several branch pipes 203, all of which are radially arranged inside the ring cutter body 1 near the cutter head 101. The air inlet 201 is used as an interface for connecting an external air source to form a sealed fit. When the connector is inserted into the air inlet 201, gas enters each branch pipe 203 through the main pipe 202. As the gas is gradually injected, a high-pressure air chamber is formed between the branch pipe 203 and the top of the push rod 3, pushing the push rod 3 outward.

[0022] Preferably, the main pipe 202 is an annular pipe, and the main pipe 202 and the ring cutter body 1 share the same central axis.

[0023] Preferably, the branch pipes 203 are arranged at equal intervals around the central axis of the ring cutter body 1.

[0024] Preferably, the branch pipe 203 corresponds one-to-one with the push rod 3, and the push rod 3 is slidably installed in the corresponding branch pipe 203.

[0025] Based on Example 2, as a more preferred Example 3, there are at least four branch pipes 203 to avoid insufficient thrust.

[0026] In a preferred embodiment 4, the push rod 3 includes a rod body 301. One end of the rod body 301 is sealed and embedded in the corresponding branch pipe 203 by a sealing ring 5, and the other end of the rod body 301 extends out of the corresponding branch pipe 203 and is provided with a gasket 303. The gasket 303 increases the contact area and prevents the rod body 301 from directly inserting into the pit wall.

[0027] The rod body 301 has sealing grooves 302 on both the top and bottom sides. Sealing rings 5 ​​are fitted and positioned within each sealing groove 302, and the sealing grooves 302, through the sealing rings 5, form a sealing fit with the inner wall of the corresponding branch pipe 203. This ensures airtightness and provides a damping effect.

[0028] A spring 4 is provided between the end of the rod 301 away from the gasket 303 and the top of the corresponding branch pipe 203. The two ends of the spring 4 are fixed to the rod 301 and the branch pipe 203, respectively. The rod 301 is elastically limited within the corresponding branch pipe 203 by the spring 4. This elastic limitation prevents the rod 301 from coming out and also provides a reaction force to facilitate ejection after inflation. When removing soil, because the cutter body 1 is pressed into the pit wall, the spring 4 is also in an energy storage state. The gasket 303 is flush with the end of the cutter body 1 and pressed into the branch pipe 203. When ventilating for removal, the high-pressure air chamber pushes the rod 301 out, and the spring 4 is in a de-energized state to assist in the push-out, helping the cutter body 1 to eject more quickly.

[0029] Preferably, the spring 4 can be fixed using existing fixing methods such as adhesive bonding.

[0030] In a preferred embodiment 5, the cutter sections 101 of the ring cutter body 1 are arranged at intervals, with each interval corresponding to a push rod 3, and the push rod 3 is located at the corresponding interval. This ensures that the placement of the push rod 3 does not conflict with the ring cutter and does not affect its normal entry into the pit wall.

[0031] As a preferred embodiment 6, the outer edge 102 is provided around the axis on the outer side of the opening on the side of the ring cutter body 1 away from the cutter part 101. The purpose of the device is not to eject completely, but to provide a better point of leverage. After the ring cutter body 1 ejects a certain distance, the outer edge 102 also comes out of the pit wall. At this time, the operator can use the outer edge 102 as a point of leverage to remove the ring cutter.

[0032] The working principle of this utility model: The device allows air to be supplied to the ventilation slot 2, causing the push rod 3 to extend and press against the pit wall. Under the reaction force of the push rod 3, the ring cutter body 1 is ejected from the pit wall a certain distance in the opposite direction. At this time, the operator only needs to pull out the ring cutter, breaking the state of being stuck in the pit wall, providing the operator with a point of leverage, improving the efficiency of removing the ring cutter, and under the influence of the pit wall, there is no need to contact other tools, thus improving the soil removal efficiency.

Claims

1. A ring cutter for auxiliary ejection, comprising a ring cutter body (1), characterized in that, The ring cutter body (1) is provided with a ventilation groove (2). Several push rods (3) are sealed and slidably installed in the ventilation groove (2) near the cutter part (101) of the ring cutter body (1). All push rods (3) are arranged along the axial direction. When the ventilation groove (2) is connected to an external air source, the push rods (3) extend synchronously from the cutter part (101) along the axial direction.

2. The auxiliary ejection ring cutter according to claim 1, characterized in that, The ventilation groove (2) includes a main pipe (202) located inside the ring cutter body (1) on the side away from the cutter (101). The side of the main pipe (202) away from the cutter (101) is connected to the outside through the air inlet (201). The side of the main pipe (202) close to the cutter (101) is connected to several branch pipes (203). The branch pipes (203) are all arranged radially inside the ring cutter body (1) on the side close to the cutter (101).

3. The auxiliary ejection ring cutter according to claim 2, characterized in that, The main pipe (202) is a ring pipe, and the main pipe (202) and the ring cutter body (1) share the same central axis.

4. The auxiliary ejection ring cutter according to claim 3, characterized in that, The branch pipe (203) is arranged at equal intervals around the central axis of the ring cutter body (1).

5. The auxiliary ejection ring cutter according to claim 4, characterized in that, The branch pipe (203) corresponds one-to-one with the push rod (3), and the push rod (3) is sealed and slidably installed in the corresponding branch pipe (203).

6. The auxiliary ejection ring cutter according to claim 5, characterized in that, The push rod (3) includes a rod body (301), one end of which is sealed and embedded in the corresponding branch pipe (203) by a sealing ring (5), and the other end of which passes through the corresponding branch pipe (203) and is provided with a gasket (303).

7. The auxiliary ejection ring cutter according to claim 6, characterized in that, The rod (301) is provided with a sealing groove (302) on the side near the top and the side near the bottom. A sealing ring (5) is fitted and limited in the sealing groove (302), and the sealing groove (302) forms a sealing fit with the inner wall of the corresponding branch pipe (203) through the sealing ring (5).

8. The auxiliary ejection ring cutter according to claim 7, characterized in that, A spring (4) is provided between the end of the rod (301) away from the gasket (303) and the top of the corresponding branch pipe (203), and the two ends of the spring (4) are fixed on the rod (301) and the branch pipe (203) respectively. The rod (301) forms an elastic limiting fit in the corresponding branch pipe (203) through the spring (4).

9. The auxiliary ejection ring cutter according to claim 1, characterized in that, The blades (101) of the ring cutter body (1) are arranged at intervals, with each interval corresponding to a push rod (3), and the push rod (3) is located at the corresponding interval.

10. A ring cutter with auxiliary ejection according to claim 1, characterized in that, The ring cutter body (1) has an outer edge (102) around the axis on the outer side of the opening on the side away from the cutter part (101).

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