CN116275294B - A labor-saving cutting device with a slender rod that facilitates power coordination - Google Patents

Abstract

The invention proposes a slender rod labor-saving cutting device that facilitates power coordination, including a base, two side clamps respectively provided at both ends of the base, an intermediate clamp coaxial with the two side clamps and a cutting device arranged between the two side clamps. device, and a hand-operated driving mechanism that drives the cutting device to rotate and feed; the hand-operated driving mechanism includes a rocker, a drive shaft, a high-speed shaft and a low-speed shaft. The high-speed shaft transmits torque to the high-speed shaft lying on the base through the reversing mechanism. The hollow shaft and the high-speed hollow shaft drive the cutting device to rotate; the low-speed shaft drives and transmits torque to the low-speed hollow shaft lying on the other side of the base through the reversing mechanism. The low-speed hollow shaft and the high-speed hollow shaft rotate in the same direction but there is a difference in rotation speed. The low-speed hollow shaft It is linked with the high-speed hollow shaft to drive the cutting device to feed while rotating. The invention can cut the slender rod according to regulations at the lowest possible cost when power is inconvenient or insufficient, free from environmental restrictions.

Description

A labor-saving cutting device with a slender rod that facilitates power coordination

Technical field

The invention relates to the technical field of machining, and in particular to a slender rod labor-saving cutting device that facilitates power coordination.

Background technique

As of 2021, the GDP of my country's construction industry and industry is 7.29957 billion yuan and 31.30711 billion yuan respectively, accounting for a large proportion of the GDP; from the World Bank's "Industrial Growth Value Ranking of Global Countries" It shows that China's industry ranks first in the world with a growth of US$5.77186 billion; processing slender rods is an essential task in both construction and industry. To cut slender rods, you need to use a cutting machine. However, traditional slender rod cutting machines have certain defects. For example, the most commonly used grinding wheel cutting machine needs to be connected to electricity for cutting. When the length of the connecting wire is not enough or the cutting place lacks electricity, When using the socket, you need to carry the engine before you can use it. In this case, it will be very troublesome. Especially in some extreme environments, such as humidity, it will be very difficult and dangerous to use the power supply.

Contents of the invention

In order to solve the above technical problems, the present invention designs a slender rod labor-saving cutting device that facilitates power coordination.

The technical solution of the present invention is implemented as follows:

A slender rod labor-saving cutting device that facilitates power coordination, including a base, two side clamps respectively provided at both ends of the base, an intermediate clamp and a cutting device provided between the two side clamps and coaxial with the two side clamps, and a drive A hand-operated driving mechanism for the rotation and feed of the cutting device; the hand-operated driving mechanism includes a rocker, a drive shaft, a high-speed shaft and a low-speed shaft. The drive shaft is directly driven by the rocker, and the drive shaft drives the high-speed shaft through a synchronization wheel to synchronize and reverse The drive shaft drives the low-speed shaft to rotate at a speed lower than the drive shaft through the belt transmission device; the high-speed shaft transmits torque to the high-speed hollow shaft lying on the base through the 90-degree reversing mechanism, and the high-speed hollow shaft drives the cutting device to rotate; the low-speed shaft The torque is transmitted to the low-speed hollow shaft lying on the other side of the base through the 90-degree reversing mechanism. The low-speed hollow shaft and the high-speed hollow shaft are on the same axis, with opposite rotation directions and a speed difference, resulting in the low-speed hollow shaft and the high-speed hollow shaft. The linkage drives the cutting device to feed while rotating.

The cutting device is a mechanical iris structure, including multiple arc-shaped cutters arranged on the same plane. The cutters are hinged on a base frame, and the base frame is fixedly connected to a low-speed hollow shaft; the cutter is also provided with a sliding column and a high-speed hollow shaft. A chute plate is fixedly connected to the upper part, and the chute plate is provided with a chute that matches the sliding column.

The reversing mechanism includes a small bevel gear and a large bevel gear that mesh with each other. The small bevel gear is connected to a high-speed shaft or a low-speed shaft, and the large bevel gear is connected to a high-speed hollow shaft or a low-speed hollow shaft.

The belt transmission device is provided with a tensioning mechanism to adjust the tensioning force.

The belt transmission device includes a small pulley arranged on the drive shaft and a large pulley arranged on the low speed shaft. The small pulley and the large pulley are connected by a belt. During operation, the pulley is moved by applying torque to the rocker, and then the force is transmitted to the cutting device through the pulley and the adjusting tension pulley, and the iris mechanism is driven to rotate through the high and low speed shafts, and the difference in speed between the high speed shaft and the low speed shaft causes the arc to rotate. The shaped cutter shrinks to cut the slender rod and complete the work task. Since there is a certain resistance to the knife feed, it is set up as a labor-saving structure in which the small pulley drives the large pulley. The large pulley and the small pulley can also be set to the same size, so that the speed difference between the drive shaft and the low-speed shaft is achieved by controlling the tension.

The base is provided with an upper cover covering the belt transmission device, and the tensioning mechanism is fixed on the upper cover. The upper cover plays the role of fixing the tensioning mechanism and also protects the operator's safety.

The tensioning mechanism includes a tensioning wheel, a fixed frame fixed to the upper cover, a movable part that can move up and down, and a latch that fixes the position of the movable part; the movable part is provided with a slot that matches the latch, and the upper end of the movable part is in contact with the latch. The fixed frame is elastically tightened, and the lower end is hinged with the tensioning wheel and the compression belt. The fixed frame is installed on the upper cover, the movable parts pass through the upper cover, the tension wheel at the lower end presses the belt, the upper end is connected to the pressing rod, press the pressing rod downward, and the latch is inserted into the slot to maintain the tension. When you need to increase the tension, you only need to press the upper pressing lever to lower the tension. At the same time, there will be pins on both sides to block the helical teeth to prevent them from rebounding. When required to return to position, pull the latches on both sides. The tensioning wheel returns to its original position through spring force.

The high-speed hollow shaft and the low-speed hollow shaft are arranged mirror-symmetrically and are supported on the base through bearings. The hollow shaft on each side is provided with two bearings for support. A rolling bearing is used at the outer end and a sliding bearing is used at the inner end.

The two side clamps and the middle clamp are three-jaw chucks. The two side clamps are for fixing the slender rod, and the middle clamp is for supporting the slender rod. All three clamps have a centering function.

The reversing mechanism is equipped with a protective cover to prevent materials from splashing into the interior and affecting the operation of the device, and to protect the safety of the operator; the lower end of the cutting device is provided with a chip tray, which will be removed after the cutting is completed. Pulls out dump debris for easy cleanup.

When the invention is in use, pass the slender rod through the clamps on both sides, the hollow shaft and the middle clamp, lock the clamps at both ends and the middle clamp, rock the rocker to rotate the drive shaft, and the drive shaft drives the high-speed shaft to rotate through the synchronized gear, and the drive The shaft drives the low-speed shaft to rotate through the belt drive, and the torque is transmitted to the high-speed hollow shaft and the low-speed hollow shaft through the reversing device. The pulley on the drive shaft is smaller than the pulley on the low-speed shaft, so the rotation speed of the high-speed hollow shaft is greater than that of the low-speed hollow shaft. Rotation speed, when the low-speed hollow shaft and the high-speed hollow shaft rotate differentially, the sliding column moves from one end of the chute to the other end, and the cutter of the mechanical iris structure condenses from the unfolded state to the closed state, cutting the slender rod, which can ensure the fineness. Smooth cut section of long pole.

The belt drive used in the present invention has a speed regulating function that other rigid drives do not have. By controlling the position of the tension pulley, it adjusts the tension of the pulley to achieve control of the pulley transmission speed to meet the needs of the mechanical iris mechanism. Rotary cutting of slender rods requires speed differential requirements. In addition, the belt drive has good flexibility, which can alleviate impact and absorb vibration; for example, when the rotation is too fast, a large speed difference will occur, the feed amount will be large, and the belt will slip when overloaded, protecting the tools and devices. other parts to cushion the impact.

Description of the drawings

Figure 1 is a schematic diagram of the principle of the present invention;

Figure 2 is a three-dimensional structural view of the present invention;

Figure 3 is an internal structure diagram of the present invention;

Figure 4 is a cross-sectional view of the present invention.

In the picture: 1-base, 2-side clamps, 3-middle clamp, 4-cutting device, 41-knife, 42-base frame, 43-chute plate, 44-chute, 5-hand drive mechanism, 51-rocker, 52-high-speed shaft, 53-low-speed shaft, 54-small pulley, 55-large pulley, 56-high-speed hollow shaft, 57-low-speed hollow shaft, 58-belt, 59-drive shaft, 510- Synchronous gear, 6-reversing mechanism, 61-small bevel gear, 62-large bevel gear, 7-tensioning mechanism, 71-tension wheel, 72-fixed frame, 73-movable parts, 74-pin, 75-card Slot, 76-pressing rod, 8-upper cover, 9-chip collector, 10-slender rod, 11-protective cover.

Detailed ways

The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Example 1

Referring to Figure 1-4, a slender rod labor-saving cutting device that facilitates power coordination includes a base 1 and two side clamps 2 respectively provided at both ends of the base 1. The two side clamps 2 are three-claw chucks fixed on the base 1. and protective cover 11. The three-jaw chuck has a self-centering function. When the slender rod 10 is clamped, the slender rod 10 can always be in the center of the iris cutting device. This not only facilitates the arc blade cutter to cut the slender rod 10, but also reduces the risk of cutting the slender rod 10. Wear caused by uneven force. The base has a mirror image layout, with a rolling bearing and a sliding bearing provided on each side to support the high-speed hollow shaft 56 and the low-speed hollow shaft 57. The cutting device 4 is arranged between the clamps 2 on both sides. An intermediate clamp 3 is also arranged next to the cutting device 4. After the slender rod 10 is clamped by the clamps 2 on both ends, an intermediate clamp 3 is added in the middle close to the cutting mechanism. Support and fix the position of the elongated rod 10. The intermediate clamp 3 is fixed in the base frame 42 and rotates together with the base frame 42. Balls are provided on the clamping jaws of the intermediate clamp 3 to contact the elongated rod 10, so the intermediate clamp 3 can support and position the elongated rod 10.

The cutting device 4 adopts a mechanical iris structure and includes multiple arc-shaped cutters 41 arranged on the same plane. The cutters 41 are hinged on the base frame 42, and the base frame 42 is fixedly connected to the low-speed hollow shaft 57; the cutters 41 are also provided with sliding columns. The high-speed hollow shaft 56 is fixedly connected with a chute plate 43, and the chute plate 43 is provided with a chute 44 that matches the sliding column. Before starting cutting, the sliding column is located at one end of the chute 44, and the cutter 41 is in an unfolded state; during cutting, due to the difference in rotational speed, the sliding column slides in the chute 44, pushing the cutter 41 to slowly close until the slender rod 10 is cut off. , at this time, the sliding column is located at the other end of the chute 44, and the tool is in a closed state. The end face cut by the mechanical iris structure cutter is smooth, without ridges or deformation.

The cutting device is driven by a hand-operated drive mechanism 5 to achieve rotary cutting and knife feeding. The hand-operated drive mechanism 5 includes a rocker 51, a drive shaft 59, a high-speed shaft 52 and a low-speed shaft 53. The drive shaft 59 is provided with a small pulley 54 and a synchronizer. Gear 510, the high-speed shaft 52 is provided with a synchronous gear 510 that matches the synchronous gear on the drive shaft 59, the low-speed shaft 53 is provided with a large pulley 55, and the small pulley 54 and the large pulley 55 are connected by a belt 58. It is a belt transmission device, and a tensioning mechanism 7 is also provided on the belt transmission device to adjust the tension force. During operation, the pulley is moved by applying torque to the rocker 51. The drive shaft 59 drives the high-speed shaft to rotate through the synchronization gear 510. At the same time, the low-speed shaft 53 is driven to rotate through the belt drive. The high-speed shaft 52 transmits torque to the base lying on the base through the reversing mechanism 6. 1, the high-speed hollow shaft 56 drives the cutting device to rotate; the low-speed shaft 53 drives and transmits torque to the low-speed hollow shaft 57 lying on the other side of the base through the reversing mechanism 6, and the low-speed hollow shaft 57 and the high-speed hollow shaft 56 The direction of rotation is the same, but the size of the pulleys is different, and the transmission speed is different. Therefore, the rotation speed of the high-speed hollow shaft 56 is greater than the rotation speed of the low-speed hollow shaft 57. The resulting rotation speed difference causes the low-speed hollow shaft 57 and the high-speed hollow shaft 56 to drive the cutting device in conjunction. Feed while rotating. The large pulley 55 and the small pulley 54 can also be set to have the same size, so that the rotation speed difference between the drive shaft 59 and the low speed shaft 53 can be achieved by controlling the tension.

The reversing mechanism 6 includes a small bevel gear 61 and a large bevel gear 62 that mesh with each other. The reversing mechanism 6 is provided on both the high-speed shaft 52 and the low-speed shaft 53. The small bevel gear 61 is connected to the high-speed shaft 52 or the low-speed shaft 53 through a key. The large bevel gear 62 is connected to the high-speed hollow shaft 56 or the low-speed hollow shaft 56 through splines. The reversing mechanism 6 is a small bevel gear 61 meshing with a large bevel gear 62, so that the torque is transmitted and amplified in 90° reversal.

A chip collecting tray 9 is provided at the lower end of the cutting device 4. After cutting is completed, the chip collecting tray 9 is pulled out and dumped to facilitate cleaning.

The base 1 is provided with an upper cover 8 covering the belt transmission device, and the reversing mechanism 6 is provided with a protective cover 11. The upper cover 8 and the protective cover 11 are used to protect the internal mechanism and prevent debris flying from the work place during work. It prevents objects from affecting the cutting of slender rods and prevents production operation risks caused by improper operation by workers during the work process.

In pulley transmission, overall slippage sometimes occurs. Slippage will increase the wear of the belt, reduce the speed of the low-speed pulley, and even cause the transmission to fail. Therefore, we should try our best to avoid this situation, so a belt drive is designed. Tensioning mechanism 7 to control its slipping. The tensioning mechanism 7 is fixed on the upper cover 8 and includes a tensioning wheel 71, a fixed frame 72 fixed on the upper cover 8, a movable part 73 that can move up and down, and a latch 74 that fixes the position of the movable part 73; A slot 75 matching the latch 74 is provided, the upper end of the movable member 73 is elastically pressed against the fixed frame 72, and the lower end is hinged to the tensioning wheel 71 to compress the belt. The fixed frame 72 is installed on the upper cover 8, the movable part 73 passes through the upper cover 8, the tension wheel 71 at the lower end presses the belt, the upper end is connected to the pressing rod 76, press the pressing rod 76 downward, and the latch 74 snaps into the slot 75 within to maintain tension. The slot 75 is a plate ratchet. You can press it directly when pressing down. When you need to relax the tension, you need to pull out the latch 74 first. The pressing rod 76 will spring upward due to the elastic force of the spring. Select a suitable position and then insert the latch 74. Just fix it. When the tension of this device needs to be adjusted during use, it can be adjusted directly without stopping the work. Pulley transmission has a speed regulation function that gear transmission does not have. It controls the pulley transmission speed by controlling the position of the tension pulley and adjusting the tension of the pulley to meet the requirements of the mechanical iris mechanism on the slender rod. Rotary cutting requires speed differential requirements. Moreover, the size of the mechanical iris mechanism is larger and the hollow distance is larger, so the use of pulley transmission here can save costs compared with other transmission mechanisms.

Example 2

This embodiment is based on Embodiment 1 and changes the transmission mode of the high-speed shaft and the low-speed shaft. Specifically, it is: a slender rod labor-saving cutting device that facilitates power coordination, including a base 1, respectively arranged on both sides of both ends of the base 1 Clamp 2, the clamps 2 on both sides are three-jaw chucks, fixed on the base 1 and the protective cover 11. The three-jaw chuck has a self-centering function. When the slender rod 10 is clamped, the slender rod 10 can always be in the center of the iris cutting device. This not only facilitates the arc blade cutter to cut the slender rod 10, but also reduces the risk of cutting the slender rod 10. Wear caused by uneven force. The base has a mirror-image layout, with a rolling bearing and a sliding bearing provided on each side, respectively used to support the high-speed hollow shaft 56 and the low-speed hollow shaft 57 . The cutting device 4 is arranged between the clamps 2 on both sides. An intermediate clamp 3 is also arranged next to the cutting device 4. After the slender rod 10 is clamped by the clamps 2 on both ends, an intermediate clamp 3 is added in the middle close to the cutting mechanism. Support and secure the position of the elongated rod 10. The intermediate clamp 3 is fixed in the base frame 42 and rotates together with the base frame 42. Balls are provided on the clamping jaws of the intermediate clamp 3 to contact the elongated rod 10, so the intermediate clamp 3 can support and position the elongated rod 10.

The cutting device 4 adopts a mechanical iris structure and includes multiple arc-shaped cutters 41 arranged on the same plane. The cutters 41 are hinged on the base frame 42, and the base frame 42 is fixedly connected to the low-speed hollow shaft 57; the cutters 41 are also provided with sliding columns. The high-speed hollow shaft 56 is fixedly connected with a chute plate 43, and the chute plate 43 is provided with a chute 44 that matches the sliding column. Before starting cutting, the sliding column is located at one end of the chute 44, and the cutter 41 is in an unfolded state; during cutting, due to the difference in rotational speed, the sliding column slides in the chute 44, pushing the cutter 41 to slowly close until the slender rod 10 is cut off. , at this time, the sliding column is located at the other end of the chute 44, and the tool is in a closed state. The end face cut by the mechanical iris structure cutter is smooth, without ridges or deformation.

The cutting device is driven by a hand drive mechanism 5 to realize rotary cutting and knife feeding. The hand drive mechanism 5 includes a rocker 51, a drive shaft 59, a high-speed shaft 52 and a low-speed shaft 53. The synchronous gear 510 of the synchronous gear pair, the drive shaft 59 and the low-speed shaft 53 are connected through a planetary gear reducer. The rotation speed of the high-speed shaft 52 is greater than the rotation speed of the low-speed shaft 53, so the low-speed hollow shaft 57 and the high-speed hollow shaft 56 rotate in the same direction. However, the rotation speed of the high-speed hollow shaft 56 is greater than the rotation speed of the low-speed hollow shaft 57. The resulting rotation speed difference causes the low-speed hollow shaft 57 and the high-speed hollow shaft 56 to drive the cutting device to feed while rotating.

A chip collecting tray 9 is provided at the lower end of the cutting device 4. After cutting is completed, the chip collecting tray 9 is pulled out and dumped to facilitate cleaning.

The reversing mechanism 6 includes a small bevel gear 61 and a large bevel gear 62 that mesh with each other. The reversing mechanism 6 is provided on both the high-speed shaft 52 and the low-speed shaft 53. The small bevel gear 61 is connected to the high-speed shaft 52 or the low-speed shaft 53 through a key. The large bevel gear 62 is connected to the high-speed hollow shaft 56 or the low-speed hollow shaft 56 through splines. The reversing mechanism 6 is a small bevel gear 61 meshing with a large bevel gear 62, so that the torque is transmitted and amplified in 90° reversal.

The base 1 is provided with an upper cover 8 covering the planetary gear reducer, and the reversing mechanism 6 is provided with a protective cover 11. The upper cover 8 and the protective cover 11 are used to protect the internal mechanism and prevent flying particles from the work place during work. Debris affects the cutting of the slender rod, preventing production operation risks caused by improper operation by workers during the work process.

Example 3

This embodiment is based on Embodiment 1 and changes the fixing method of the intermediate clamp 3. Referring to Figures 1-4, a slender rod labor-saving cutting device that facilitates power coordination includes a base 1 and two Side clamp 2, both sides of the clamp 2 are three-jaw chucks, fixed on the base 1 and the protective cover 11. The three-jaw chuck has a self-centering function. When the slender rod 10 is clamped, the slender rod 10 can always be in the center of the iris cutting device. This not only facilitates the arc blade cutter to cut the slender rod 10, but also reduces the risk of cutting the slender rod 10. Wear caused by uneven force. The base has a mirror image layout, with a rolling bearing and a sliding bearing provided on each side to support the high-speed hollow shaft 56 and the low-speed hollow shaft 57. The cutting device 4 is arranged between the clamps 2 on both sides. An intermediate clamp 3 is also arranged next to the cutting device 4. After the slender rod 10 is clamped by the clamps 2 on both ends, an intermediate clamp 3 is added in the middle close to the cutting mechanism. Support and secure the position of the elongated rod 10. The intermediate clamp 3 is fixed on the sliding bearing seat and does not rotate together with the base frame 42. The clamping jaws of the intermediate clamp 3 are provided with balls to contact the elongated rod 10, so the intermediate clamp 3 can support and position the elongated rod 10. .

The cutting device 4 adopts a mechanical iris structure and includes multiple arc-shaped cutters 41 arranged on the same plane. The cutters 41 are hinged on the base frame 42, and the base frame 42 is fixedly connected to the low-speed hollow shaft 57; the cutters 41 are also provided with sliding columns. The high-speed hollow shaft 56 is fixedly connected with a chute plate 43, and the chute plate 43 is provided with a chute 44 that matches the sliding column. Before starting cutting, the sliding column is located at one end of the chute 44, and the cutter 41 is in an unfolded state; during cutting, due to the difference in rotational speed, the sliding column slides in the chute 44, pushing the cutter 41 to slowly close until the slender rod 10 is cut off. , at this time, the sliding column is located at the other end of the chute 44, and the tool is in a closed state. The end face cut by the mechanical iris structure cutter is smooth, without ridges or deformation.

The cutting device is driven by a hand-operated drive mechanism 5 to achieve rotary cutting and knife feeding. The hand-operated drive mechanism 5 includes a rocker 51, a drive shaft 59, a high-speed shaft 52 and a low-speed shaft 53. The drive shaft 59 is provided with a small pulley 54 and a synchronizer. Gear 510, the high-speed shaft 52 is provided with a synchronous gear 510 that matches the synchronous gear on the drive shaft 59, the low-speed shaft 53 is provided with a large pulley 55, and the small pulley 54 and the large pulley 55 are connected by a belt 58. It is a belt transmission device, and a tensioning mechanism 7 is also provided on the belt transmission device to adjust the tension force. During operation, the pulley is moved by applying torque to the rocker 51. The drive shaft 59 drives the high-speed shaft to rotate through the synchronization gear 510. At the same time, the low-speed shaft 53 is driven to rotate through the belt drive. The high-speed shaft 52 transmits torque to the base lying on the base through the reversing mechanism 6. 1, the high-speed hollow shaft 56 drives the cutting device to rotate; the low-speed shaft 53 drives and transmits torque to the low-speed hollow shaft 57 lying on the other side of the base through the reversing mechanism 6, and the low-speed hollow shaft 57 and the high-speed hollow shaft 56 The direction of rotation is the same, but the size of the pulleys is different, and the transmission speed is different. Therefore, the rotation speed of the high-speed hollow shaft 56 is greater than the rotation speed of the low-speed hollow shaft 57. The resulting rotation speed difference causes the low-speed hollow shaft 57 and the high-speed hollow shaft 56 to drive the cutting device in conjunction. Feed while rotating. The large pulley 55 and the small pulley 54 can also be set to have the same size, so that the rotation speed difference between the drive shaft 59 and the low speed shaft 53 can be achieved by controlling the tension.

A chip collecting tray 9 is provided at the lower end of the cutting device 4. After cutting is completed, the chip collecting tray 9 is pulled out and dumped to facilitate cleaning.

The reversing mechanism 6 includes a small bevel gear 61 and a large bevel gear 62 that mesh with each other. The reversing mechanism 6 is provided on both the high-speed shaft 52 and the low-speed shaft 53. The small bevel gear 61 is connected to the high-speed shaft 52 or the low-speed shaft 53 through a key. The large bevel gear 62 is connected to the high-speed hollow shaft 56 or the low-speed hollow shaft 56 through splines. The reversing mechanism 6 is a small bevel gear 61 meshing with a large bevel gear 62, so that the torque is transmitted and amplified in 90° reversal.

The base 1 is provided with an upper cover 8 covering the belt transmission device, and the reversing mechanism 6 is provided with a protective cover 11. The upper cover 8 and the protective cover 11 are used to protect the internal mechanism and prevent debris flying from the work place during work. It prevents objects from affecting the cutting of slender rods and prevents production operation risks caused by improper operation by workers during the work process.

In pulley transmission, overall slippage sometimes occurs. Slippage will increase the wear of the belt, reduce the speed of the low-speed pulley, and even cause the transmission to fail. Therefore, we should try our best to avoid this situation, so a belt drive is designed. Tensioning mechanism 7 to control its slipping. The tensioning mechanism 7 is fixed on the upper cover 8 and includes a tensioning wheel 71, a fixed frame 72 fixed on the upper cover 8, a movable part 73 that can move up and down, and a latch 74 that fixes the position of the movable part 73; A slot 75 matching the latch 74 is provided, the upper end of the movable member 73 is elastically pressed against the fixed frame 72, and the lower end is hinged to the tensioning wheel 71 to compress the belt. The fixed frame 72 is installed on the upper cover 8, the movable part 73 passes through the upper cover 8, the tension wheel 71 at the lower end presses the belt, the upper end is connected to the pressing rod 76, press the pressing rod 76 downward, and the latch 74 is inserted into the slot 75 within to maintain tension. The slot 75 is a plate ratchet. You can press it directly when pressing down. When you need to relax the tension, you need to pull out the latch 74 first. The pressing rod 76 will spring upward due to the elastic force of the spring. Select a suitable position and then insert the latch 74. Just fix it. When the tension of this device needs to be adjusted during use, it can be adjusted directly without stopping the work. Pulley transmission has a speed regulation function that gear transmission does not have. It controls the pulley transmission speed by controlling the position of the tension pulley and adjusting the tension of the pulley to meet the requirements of the mechanical iris mechanism on the slender rod. Rotary cutting requires speed differential requirements. Moreover, the size of the mechanical iris mechanism is larger and the hollow distance is larger, so the use of pulley transmission here can save costs compared with other transmission mechanisms.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection.

Claims (8)

1. A slender rod labor-saving cutting device that facilitates power coordination, which is characterized by: including a base, two side clamps respectively arranged at both ends of the base, and an intermediate clamp coaxial with the two side clamps arranged between the two side clamps. and cutting device, as well as a hand-operated driving mechanism that drives the cutting device to rotate and feed; The hand-operated driving mechanism includes a rocker, a drive shaft, a high-speed shaft and a low-speed shaft. The high-speed shaft transmits torque to the high-speed hollow shaft lying on the base through the reversing mechanism. The high-speed hollow shaft drives the cutting device to rotate; the low-speed shaft passes through the reversing mechanism. The mechanism drives and transmits torque to the low-speed hollow shaft lying on the other side of the base. The low-speed hollow shaft and the high-speed hollow shaft rotate in opposite directions and there is a speed difference. The low-speed hollow shaft and the high-speed hollow shaft linkage to drive the cutting device to feed while rotating; The drive shaft is manually driven through a rocker, the drive shaft and the high-speed shaft are driven by a pair of synchronous gears, and the drive shaft and the low-speed shaft are driven by a belt drive; The cutting device is a mechanical iris structure, including multiple arc-shaped cutters arranged on the same plane. The cutters are hinged on a base frame, and the base frame is fixedly connected to a low-speed hollow shaft; the cutter is also provided with a sliding column and a high-speed hollow shaft. A chute plate is fixedly connected to the upper part, and the chute plate is provided with a chute that matches the sliding column. 2. The slender rod labor-saving cutting device that facilitates power coordination according to claim 1, characterized in that: the reversing mechanism includes a small bevel gear and a large bevel gear that mesh with each other, and the small bevel gear is connected to a high-speed shaft or a low-speed shaft. Connection, the large bevel gear is connected with the high-speed hollow shaft or the low-speed hollow shaft. 3. The slender rod labor-saving cutting device that facilitates power coordination according to claim 1, characterized in that: the belt transmission device is provided with a tensioning mechanism to adjust the tensioning force. 4. The slender rod labor-saving cutting device that facilitates power coordination according to claim 3, characterized in that the belt transmission device includes a small pulley provided on the drive shaft and a large pulley provided on the low-speed shaft. , the small pulley and the large pulley are connected by a belt. 5. The slender rod labor-saving cutting device that facilitates power coordination according to claim 4, characterized in that: the base is provided with an upper cover covering the belt transmission device, and the tensioning mechanism is fixed on the upper cover. 6. The slender rod labor-saving cutting device that facilitates power coordination according to claim 5, characterized in that: the tensioning mechanism includes a tensioning wheel, a fixed frame fixed to the upper cover, a movable part that can move up and down, and a fixed frame. The latch at the position of the movable part; the movable part is provided with a slot that matches the latch, the upper end of the movable part is elastically pressed against the fixed frame, and the lower end is hinged to the tensioning wheel and the compression belt. 7. The slender rod labor-saving cutting device that facilitates power coordination according to claim 1, characterized in that: the clamps on both sides and the middle clamp are three-jaw chucks. 8. The slender rod labor-saving cutting device that facilitates power coordination according to claim 1, characterized in that: the reversing mechanism is provided with a protective cover; and the lower end of the cutting device is provided with a chip tray.