A rubber hose cutting device

Abstract

The application discloses a rubber hose cutting device, which comprises a moving base, an inner supporting device and a cutting device. The inner supporting device comprises a fixed sleeve, a movable sleeve, an inner supporting gasket, a driven support rod, a driving support rod and a push-pull mechanism. The push-pull mechanism is in driving connection with the movable sleeve. The cutting device comprises a power motor, a transmission shaft, an elastic mounting mechanism and a cutting blade. The transmission shaft is rotatably sleeved in the movable sleeve, the rear end of the transmission shaft is connected with the power motor, the front end of the transmission shaft is provided with the elastic mounting mechanism, and the root of the cutting blade is rotatably mounted in the elastic mounting mechanism. When the transmission shaft rotates, the cutting blade is pressed against the inner wall of the rubber hose, and when the transmission shaft is static, the cutting blade is separated from the inner wall under the action of the elastic mounting mechanism. The rubber hose is cut in an inner cutting mode, and the possibility of uneven cutting surface can be avoided.

Description

Technical Field

[0001] This invention relates to the field of rubber processing technology, and more specifically to a cutting device for polymer rubber hose products. Background Technology

[0002] Rubber hoses are tubular, flexible pipes made of rubber, possessing a certain degree of elasticity and flexibility, allowing them to bend and expand. Current technologies primarily employ the following methods for cutting rubber hoses: First, blade cutting, which uses sharp tools such as scissors or pipe cutters to directly sever the hose; second, mechanical cutting, utilizing specialized pipe cutting machines or other mechanical equipment to ensure precision and efficiency; and third, thermal cutting, which softens the rubber hose locally through heating before cutting, such as flame cutting.

[0003] Patent CN113500646B, entitled "A Cutting Device for Polymer Rubber Products for New Energy Vehicles," proposes adding a tube-fixing structure during the cutting process. This involves pressing the rubber hose tightly from the middle and installing two railings on both sides of the cutting blade to prevent the hose's cross-section from becoming elliptical during the cutting process. However, because the cutting method dictates a vertical downward pressure on the rubber hose during the cutting process, this downward pressure inevitably forces the hose against the railings, resulting in a rounded rectangular cross-section. Consequently, the cut surfaces at the four corners of this rounded rectangle may still be uneven with the rest of the cross-section.

[0004] The patent with publication number CN117507026A is entitled "A Cutting Device for Polymer Rubber Hose Products". It uses an inner lining mechanism to support one side of the rubber hose cutting part, and uses a support claw and an anti-detachment pad to fix the other side of the rubber hose cutting part. Then, a downward-pushing cutting blade is used to cut the rubber hose from the cutting part. However, the support claw and the anti-detachment pad will also cause the cross-section of the rubber hose to become elliptical during the punching process. Therefore, the cut surface may still be uneven with the cross-section of other parts. Summary of the Invention

[0005] In view of this, the present invention proposes a rubber hose cutting device that uses an internal cutting method to cut the rubber hose, so as to avoid the possibility that the cut surface is uneven with the other parts of the cross-section.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A rubber hose cutting device includes a movable base, on which an inner support device and a cutting device are provided;

[0008] The internal support device includes a fixed sleeve, a movable sleeve, internal support pads, driven support rods, active support rods, and a push-pull mechanism. The movable sleeve is coaxially and movably fitted inside the fixed sleeve, with both the front and rear ends of the movable sleeve extending from the front and rear ends of the fixed sleeve. There are several internal support pads, which are evenly distributed around the central axis of the fixed sleeve in the circumferential direction on the outer side of the fixed sleeve. The driven support rods are arranged in a one-to-one ratio with the internal support pads, and the driven support rods are evenly distributed around the central axis of the fixed sleeve between the fixed sleeve and the internal support pads. One end of each driven support rod is hinged to the outer wall of the fixed sleeve, and the other end is hinged to the internal support pad. The active support rods are arranged in a one-to-many ratio with the driven support rods. One end of each active support rod is hinged to the outer wall of the front end of the movable sleeve, and the other end of each active support rod is hinged to the middle of the driven support rod.

[0009] The push-pull mechanism is driven to the movable sleeve, and the push-pull mechanism is used to drive the movable sleeve to move axially along the fixed sleeve.

[0010] The cutting device includes a power motor, a drive shaft, an elastic mounting mechanism, and a cutting blade. The drive shaft is rotatably fitted inside a movable sleeve, and both its front and rear ends extend from the front and rear ends of the movable sleeve. The rear end of the drive shaft is connected to the power output end of the power motor. The front end of the drive shaft is provided with an elastic mounting mechanism, and the root of the cutting blade is rotatably mounted inside the elastic mounting mechanism. When the drive shaft rotates, the cutting blade overcomes the elastic force provided by the elastic mounting mechanism and presses against the inner wall of the rubber hose. When the drive shaft is stationary, the cutting blade is dislodged from the inner wall of the rubber hose by the elastic force provided by the elastic mounting mechanism.

[0011] To better achieve the above technical solution, optionally, the push-pull mechanism includes a linear motor, a connecting rod sleeve, a gear, a fixed gear rail, and a movable gear rail. The rear end of the connecting rod sleeve is fixed to the power output end of the linear motor, and the front end of the connecting rod sleeve is rotatably provided with a gear. The fixed gear rail and the movable gear rail are spaced apart and arranged in parallel. The fixed gear rail is fixed on a movable base, and the movable gear rail is fixed on a movable sleeve. The gear is meshed with the fixed gear rail and the movable gear rail respectively.

[0012] Optionally, there are six driven support rods, which are evenly arranged in two rows on the outer circumferential surface of the front and rear ends of the fixed sleeve. There are three active support rods, which are hinged to the driven support rods in the front row.

[0013] Optionally, the front end of the movable sleeve is fixedly provided with a support tray, and the outer peripheral surface of the support tray is provided with a receiving groove for accommodating the front end of the inner support pad. When the movable sleeve moves forward and the driven support rod is folded, the front end of the support tray is placed into the receiving groove. When the movable sleeve moves backward and the driven support rod is unfolded, the front end of the support tray is disengaged from the receiving groove.

[0014] Optionally, the internal support device further includes a fixed support, and the fixed support is fixedly inserted through the rear end of the fixed sleeve.

[0015] Optionally, the elastic mounting mechanism includes an expanding sleeve, a tool mounting seat, a connecting pin, and a torsion spring. The expanding sleeve is fixedly sleeved on the front end of the drive shaft, the tool mounting seat is fixedly mounted on the outer wall of the expanding sleeve, and the connecting pin is fixedly inserted through the tool mounting seat parallel to the axial direction of the expanding sleeve. The root of the cutting blade is rotatably sleeved on the connecting pin. The tool mounting seat has a side groove for the cutting blade to rotate around the central axis of the expanding sleeve. A torsion spring is also movably sleeved on the connecting pin. One end of the torsion spring is tied to the root of the cutting blade, and the other end is tied to the inner side wall of the side groove.

[0016] Optionally, there are four tool mounting seats, which are evenly distributed on the outer circumference of the expansion sleeve, and the cutting blades are respectively configured to cooperate with the tool mounting seats, connecting pins and torsion springs.

[0017] Optionally, the head end of the cutting blade is a curved blade structure.

[0018] The beneficial effects of this invention are:

[0019] This invention discloses a rubber hose cutting device that stably supports the inner wall of the hose, ensuring that the hose does not deform during cutting. During high-speed rotational cutting, the inner support pad tightly supports the hose, making the cut more precise. The elastic mounting mechanism allows the cutting blade to flexibly adapt to rubber hoses of different inner diameters, achieving the purpose of internal cutting, resulting in more precise cuts and eliminating rough surfaces after cutting. The push-pull mechanism enables axial movement of the movable sleeve, ensuring smooth operation of the inner support and cutting processes. Attached Figure Description

[0020] Figure 1 This is a perspective view of a rubber hose cutting device according to an embodiment of the present invention;

[0021] Figure 2 yes Figure 1 Top view;

[0022] Figure 3 yes Figure 1 Side view of a partial structure of the inner support device (excluding the push-pull mechanism);

[0023] Figure 4 yes Figure 3 A three-dimensional schematic diagram of the middle section structure;

[0024] Figure 5 yes Figure 1 Schematic diagram of the cutting device;

[0025] Figure label:

[0026] Mobile base 10

[0027] Fixed sleeve 211, movable sleeve 212, inner support washer 213, driven support rod 214, driving support rod 215, linear motor 221, connecting rod sleeve 222, gear 223, fixed gear rail 224, movable gear rail 225, fixed support 231, bearing plate 241, receiving groove 242, guide support 25.

[0028] 31. Power motor, 32. Drive shaft, 331. Expanding sleeve, 332. Tool mounting base, 3321. Side groove, 333. Connecting pin, 334. Torsion spring, 334. Cutting blade. Detailed Implementation

[0029] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Identical components are indicated by the same reference numerals.

[0030] Please see Figures 1 to 5 This invention discloses a rubber hose cutting device, including a movable base 10, an inner support device, and a cutting device. The inner support device and the cutting device are both mounted on the movable base 10, and the linear movement of the movable base 10 drives the inner support device and the cutting device to move synchronously.

[0031] like Figures 1 to 4As shown, the internal support device includes a fixed sleeve 211, a movable sleeve 212, an internal support pad 213, a driven support rod 214, an active support rod 215, and a push-pull mechanism. The fixed sleeve 211 is fixedly mounted on the movable base 10. Specifically, the internal support device also includes a fixed support 231. The rear end of the fixed sleeve 211 is fixedly inserted through the fixed support 231, which is fixedly mounted on the movable base 10. The front end of the fixed sleeve 211 is located outside the movable base 10 and is suspended. During the movement of the movable base 10, the fixed sleeve 211 can extend into or out of the rubber hose. The movable sleeve 212 is coaxially movable and fitted inside the fixed sleeve 211. Both the front and rear ends of the movable sleeve 212 extend from the front and rear ends of the fixed sleeve 211. Specifically, the inner wall of the fixed sleeve 211 and the outer wall of the movable sleeve 212 slide against each other, allowing the movable sleeve 212 to slide along the fixed sleeve 211. The axial movement is achieved by several inner support pads 213, which are evenly distributed around the central axis of the fixed sleeve 211 in the circumferential direction on the outer side of the fixed sleeve 211. Driven support rods 214 are arranged in a one-to-one pair with the inner support pads 213, and are evenly distributed around the central axis of the fixed sleeve 211 between the fixed sleeve 211 and the inner support pads 213. One end of each driven support rod 214 is hinged to the outer wall of the fixed sleeve 211, and the other end is hinged to the inner support pad 213. That is, both ends of the driven support rod 214 are respectively connected to the fixed sleeve 211 and the inner support pad. The inner support pad 213 is hinged, allowing it to rotate radially towards or away from the fixed sleeve 211 as the driven support rod 214 rotates. The active support rod 215 and the driven support rod 214 are arranged in a multi-to-one configuration. One end of each active support rod 215 is hinged to the outer wall of the front end of the movable sleeve 212, and the other end of each active support rod 215 is hinged to the middle of the driven support rod 214. This allows the movable sleeve 212 to rotate when it moves, thereby driving the active support rod 215 to rotate, which in turn pushes the driven support rod 214 to rotate, thus enabling the inner support pad 213 to radially approach or move away from the fixed sleeve 211.

[0032] Based on the above design, when the movable sleeve 212 moves backward, the active support rod 215 pushes the driven support rod 214 to rotate, thereby causing the inner support pad 213 to expand radially outward, achieving internal support and fixation of the rubber hose. This internal support fixing method can effectively maintain the shape stability of the rubber hose, avoid deformation due to compression during cutting, ensure the flatness and consistency of the cut surface, and improve cutting quality. At the same time, the internal support device has a simple structure and is easy to operate, enabling quick and accurate fixation and cutting of the rubber hose, thus improving work efficiency. The linear movement of the movable base 10 can drive the internal support device and the cutting device to accurately reach the designated position for cutting operations, ensuring the accuracy and reliability of the cutting.

[0033] like Figure 1As shown, the push-pull mechanism is driven to connect with the movable sleeve 212, and the push-pull mechanism is used to drive the movable sleeve 212 to move axially along the fixed sleeve 211.

[0034] like Figure 1 As shown, the cutting device includes a power motor 31, a drive shaft 32, an elastic mounting mechanism, and a cutting blade 34. The drive shaft 32 is rotatably fitted inside the movable sleeve 212, and both the front and rear ends of the drive shaft 32 extend from the front and rear ends of the movable sleeve 212. The rear end of the drive shaft 32 is connected to the power output end of the power motor 31. The front end of the drive shaft 32 is fixedly provided with an elastic mounting mechanism. The root of the cutting blade 34 is rotatably installed in the elastic mounting mechanism, and the cutting part of the cutting blade 34 is located outside the elastic mounting mechanism. When the drive shaft 32 rotates, the cutting blade 34 overcomes the elastic force provided by the elastic mounting mechanism and presses against the inner wall of the rubber hose. When the drive shaft 32 is stationary, the cutting blade 34 is dislodged from the inner wall of the rubber hose by the elastic force provided by the elastic mounting mechanism.

[0035] In the operation of the rubber hose cutting device according to an embodiment of the present invention, firstly, the movable base 10 moves (the specific moving method adopts existing known technology, which will not be described in detail in this embodiment), so that the elastic mounting mechanism, cutting blade 34, inner support pad 213, driven support rod 214, and active support rod 215 all enter the rubber hose, and the cutting blade 34 is located in the cutting position; then, the push-pull mechanism drives the movable sleeve 212 to move backward. During this process, the movable sleeve 212 drives the active support rod 215 to rotate, and the active support rod 215 in turn pushes the driven support rod 215 to rotate. The rotation of rod 214 causes the inner support pad 213 to expand radially relative to the radially fixed sleeve 211, tightly pressing the inner support pad 213 against the inner wall of the rubber hose. This ensures stable support of the rubber hose during the cutting process, effectively preventing it from shaking or deforming. Next, the power motor 31 drives the transmission shaft 32 to rotate at high speed. The transmission shaft 32 drives the cutting blade 34 to rotate at high speed. During high-speed rotation, the cutting blade 34 overcomes the elastic resistance of the elastic mounting mechanism and tightly presses against the inner wall of the rubber hose, cutting the rubber hose circumferentially. It should be noted that because the inner support pad 213 is tightly pressed against the inner wall of the rubber hose, and the distance between the cutting blade 34 and the front end of the inner support pad 213 is within 30mm, this design prevents deformation of the rubber hose during high-speed rotation, ensuring cutting accuracy and high quality, and avoiding damage to the rubber hose caused by cutting. The entire cutting device can efficiently and accurately complete the cutting task of the rubber hose without producing a rough cutting surface.

[0036] like Figure 3 and Figure 4As shown, there are six driven support rods 214, which are evenly arranged in two rows on the outer circumferential surface of the front and rear ends of the fixed sleeve 211. There are three active support rods 215, which cooperate with the driven support rods 214 in the front row. Arranging the driven support rods 214 in two rows can improve the stability of the inner support pad 213 when it expands and contracts.

[0037] In an embodiment of the present invention, a guide support 25 is also included, which is fixed on the movable base 10 and located between the movable toothed rail 225 and the power motor 31. The rear end of the movable sleeve 212 passes through a pre-set hole in the guide support 25. The guide support 25 can increase the stability of the movable sleeve 212 when it moves.

[0038] To enable the movable sleeve 212 to move axially along the fixed sleeve 211, please refer to... Figure 1 The push-pull mechanism includes a linear motor 221, a connecting rod sleeve 222, a gear 223, a fixed gear rail 224, and a movable gear rail 225. The linear motor 221 is fixed on the movable base 10. The rear end of the connecting rod sleeve 222 is fixed on the power output end of the linear motor 221. The front end of the connecting rod sleeve 222 is rotatably equipped with a gear 223. The fixed gear rail 224 and the movable gear rail 225 are spaced apart and parallel to each other. The fixed gear rail 224 is fixed on the movable base 10, and the movable gear rail 225 is fixed on the movable sleeve 212. The gear 223 is meshed with the fixed gear rail 224 and the movable gear rail 225 respectively. The linear motor 221 drives the gear 223 to move back and forth through the connecting rod sleeve 222. During this process, due to the interaction between the gear 223 and the fixed gear rail 224, the gear 223 rotates while moving. The rotation of the gear 223 further drives the movable gear rail 225 to move back and forth, thereby driving the movable sleeve 212 to move accordingly.

[0039] like Figure 3 and Figure 4 As shown, a support tray 241 is fixedly provided at the front end of the movable sleeve 212. The outer circumferential surface of the support tray 241 is provided with a receiving groove 242 for accommodating the front end of the inner support pad 213. When the movable sleeve 212 moves forward and the driven support rod 214 folds, the front end of the support tray 241 is placed into the receiving groove 242. When the movable sleeve 212 moves backward and the active support rod 215 expands, the front end of the support tray 241 disengages from the receiving groove 242. By setting the support tray 241, it can be ensured that the inner support pad 213 retracts back into position and reliably abuts against the receiving groove 242, thereby playing a role in stably supporting the movable sleeve 212.

[0040] like Figure 5As shown, the flexible mounting mechanism includes an expanding sleeve 331, a tool mounting seat 332, a connecting pin 333, and a torsion spring 334. The expanding sleeve 331 is fixedly sleeved on the front end of the drive shaft 32. The tool mounting seat 332 is fixedly mounted on the outer wall of the expanding sleeve 331. The connecting pin 333 is fixedly inserted through the tool mounting seat 332 parallel to the axial direction of the expanding sleeve 331. The root of the cutting blade 34 is rotatably sleeved on the connecting pin 333. The tool mounting seat 332 has a side groove 3321, which allows the cutting blade 34 to rotate around the central axis of the expanding sleeve 331. The torsion spring 334 is also movably sleeved on the connecting pin 333. One end of the torsion spring 334 is connected to the root of the cutting blade 34, and the other end is fixed inside the tool mounting seat 332.

[0041] In an embodiment of the present invention, there are four tool mounting seats 332, which are evenly distributed on the outer circumferential surface of the expansion sleeve 331. Specifically, the tool mounting seats 332 and the expansion sleeve 331 are an integral structure, and each tool is respectively matched with the corresponding tool mounting seat 332, connecting pin 333 and torsion spring 334.

[0042] The working principle of the cutting device in this embodiment of the invention is as follows: The drive shaft 32 drives the expanding sleeve 331 to rotate, and the tool mounting seat 332 on the expanding sleeve 331 rotates accordingly. Under the action of centrifugal force, the cutting blade 34 overcomes the force of the torsion spring 334 and unfolds, so that the cutting part of the cutting blade 34 abuts against the inner wall of the rubber hose for cutting. The bottom side of the side groove 3321 can limit the maximum rotation angle of the cutting blade 34. At the same time, the bottom wall and the two side walls of the side groove 3321 limit the cutting blade 34, which improves the stability of the connection structure. After cutting, the rotation speed of the drive shaft 32 gradually decreases until it stops, and the cutting blade 34 closes under the elastic force of the torsion spring 334.

[0043] This invention provides a rubber hose cutting device that stably supports the inner wall of the inner support hose, ensuring that the rubber hose does not deform during cutting. When the cutting blade 34 rotates at high speed, the inner support pad 213 provides tight inner support, making the cut more precise. The elastic mounting mechanism allows the cutting blade 34 to flexibly adapt to rubber hoses of different inner diameters, achieving the purpose of internal cutting, making the cut more precise, and preventing the production of a rough surface after cutting. The push-pull mechanism enables the axial movement of the movable sleeve 212, ensuring the smooth operation of the inner support and cutting processes.

[0044] The technical solution of the present invention has been described in detail above with reference to specific embodiments. The specific embodiments described are used to help understand the concept of the present invention. Derivations and modifications made by those skilled in the art based on the specific embodiments of the present invention also fall within the scope of protection of the present invention.

Claims

1. A rubber hose cutting device, comprising a movable base (10), characterized in that, The movable base (10) is equipped with an internal support device and a cutting device; The internal support device includes a fixed sleeve (211), a movable sleeve (212), internal support pads (213), a driven support rod (214), a driven support rod (215), and a push-pull mechanism. The movable sleeve (212) is coaxially and movably fitted inside the fixed sleeve (211), and both the front and rear ends of the movable sleeve (212) extend from the front and rear ends of the fixed sleeve (211). There are several internal support pads (213), which are evenly distributed around the central axis of the fixed sleeve (211) in the circumferential direction outside the fixed sleeve (211). The driven support rod (214) and the internal support pads... (213) Multiple to one arrangement, and driven support rods (214) are evenly distributed around the central axis of fixed sleeve (211) between fixed sleeve (211) and inner support pad (213). One end of each driven support rod (214) is hinged to the outer wall of fixed sleeve (211), and the other end is hinged to inner support pad (213). The active support rod (215) and driven support rod (214) are arranged in a one-to-many manner. One end of each active support rod (215) is hinged to the outer wall of the front end of movable sleeve (212), and the other end of each active support rod (215) is hinged to the middle of driven support rod (214). The push-pull mechanism is driven to connect with the movable sleeve (212), and the push-pull mechanism is used to drive the movable sleeve (212) to move axially along the fixed sleeve (211); The cutting device includes a power motor (31), a drive shaft (32), an elastic mounting mechanism, and a cutting blade (34). The drive shaft (32) is rotatably fitted inside a movable sleeve (212), and both the front and rear ends of the drive shaft (32) extend from the front and rear ends of the movable sleeve (212). The rear end of the drive shaft (32) is connected to the power output end of the power motor (31). The front end of the drive shaft (32) is provided with an elastic mounting mechanism. The root of the cutting blade (34) is rotatably installed in the elastic mounting mechanism. When the drive shaft (32) rotates, the cutting blade (34) overcomes the elastic force provided by the elastic mounting mechanism and presses against the inner wall of the rubber hose. When the drive shaft (32) is stationary, the cutting blade (34) is dislodged from the inner wall of the rubber hose by the elastic force provided by the elastic mounting mechanism.

2. The rubber hose cutting device according to claim 1, characterized in that, The push-pull mechanism includes a linear motor (221), a connecting rod sleeve (222), a gear (223), a fixed gear rail (224), and a movable gear rail (225). The rear end of the connecting rod sleeve (222) is fixed to the power output end of the linear motor (221). The front end of the connecting rod sleeve (222) is rotatably provided with a gear (223). The fixed gear rail (224) and the movable gear rail (225) are spaced apart and parallel to each other. The fixed gear rail (224) is fixed on the movable base (10). The movable gear rail (225) is fixed on the movable sleeve (212). The gear (223) is meshed with the fixed gear rail (224) and the movable gear rail (225) respectively.

3. The rubber hose cutting device according to claim 1, characterized in that, There are six driven support rods (214), which are evenly arranged in two rows on the outer circumferential surface of the front and rear ends of the fixed sleeve (211). There are three active support rods (215), which are hinged one-to-one with the driven support rods (214) in the front row.

4. A rubber hose cutting device according to claim 3, characterized in that, The front end of the movable sleeve (212) is fixed with a support tray (241). The outer circumferential surface of the support tray (241) is provided with a receiving groove (242) for accommodating the front end of the inner support pad (213). When the movable sleeve (212) moves forward and the driven support rod (214) is folded, the front end of the support tray (241) is placed in the receiving groove (242). When the movable sleeve (212) moves backward and the driven support rod (214) is unfolded, the front end of the support tray (241) is disengaged from the receiving groove (242).

5. A rubber hose cutting device according to claim 4, characterized in that, The internal support device also includes a fixed support (231), and the fixed support (231) is fixedly inserted through the rear end of the fixed sleeve (211).

6. A rubber hose cutting device according to claim 1, characterized in that, The elastic mounting mechanism includes an expanding sleeve (331), a tool mounting seat (332), a connecting pin (333), and a torsion spring (334). The expanding sleeve (331) is fixedly sleeved on the front end of the transmission shaft (32). The tool mounting seat (332) is fixedly mounted on the outer wall of the expanding sleeve (331). The connecting pin (333) is fixedly inserted through the tool mounting seat (332) parallel to the axial direction of the expanding sleeve (331). The root of the cutting blade (34) is rotatably sleeved on the connecting pin (333). The tool mounting seat (332) has a side groove (3321) for the cutting blade (34) to rotate around the central axis of the expanding sleeve (331). The connecting pin (333) is also movably sleeved with a torsion spring (334). One end of the torsion spring (334) is tied to the root of the cutting blade (34), and the other end is tied to the inner side wall of the side groove (3321).

7. A rubber hose cutting device according to claim 6, characterized in that, There are four tool mounting seats (332), which are evenly distributed on the outer circumference of the expansion sleeve (331). The cutting blade (34) is respectively matched with the tool mounting seat (332), the connecting pin (333) and the torsion spring (334).

8. A rubber hose cutting device according to claim 7, characterized in that, The head end of the cutting blade (34) is a curved blade structure.

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