Rotary reamer

Abstract

The utility model belongs to the technical field of pipeline tools, and particularly relates to a rotary reamer which comprises a fixed handle, a fixed sleeve and a rotary handle, an ejector pin shaft is arranged in the fixed sleeve, a left gear and a right gear are arranged between the ejector pin shaft and the fixed sleeve, a first spring is arranged between the left gear and the right gear, a transmission rod is arranged on the right gear, and a sliding groove is formed in the side wall of the right gear. A first guide groove is formed in the side wall of the fixing sleeve, a second guide groove is formed in the side wall of the ejector pin shaft, and in the leftward moving process of the ejector pin shaft, after the right gear compresses the first spring to abut against the left gear, the transmission rod rotates under the combined action of the first guide groove and the second guide groove, and the right gear and the left gear are driven to rotate; and in the process that the ejector pin shaft moves rightwards, the right gear moves rightwards to leave the left gear under the elastic force effect of the first spring, and the transmission rod rotates and resets in the reverse direction under the combined effect of the first guide groove and the second guide groove to drive the right gear to rotate and resets in the reverse direction. The device is simple and convenient to operate, time-saving, labor-saving and high in working efficiency.

Description

Technical field:

[0001] The utility model belongs to the technical field of pipeline tools, in particular to a rotary reamer. Background technology:

[0002] A reamer is a device used by the operator to squeeze and expand one end of a pipe, which can expand the opening of the pipe and facilitate the connection of the pipes.

[0003] The expanding head of the existing reamer does not rotate when in use. In order to ensure uniform force on the pipe wall, it is usually necessary to manually rotate the pipe or adjust the angle of the reamer during use to achieve the purpose of rotating the expanding head relative to the pipe. The operation is cumbersome and laborious, and the work efficiency is low. Summary of the invention:

[0004] The utility model aims to provide a rotary reamer, which is simple and convenient to operate, saves time and effort and has high working efficiency.

[0005] The utility model is achieved in this way:

[0006] A rotary reamer comprises a fixed handle, a fixed sleeve arranged at the left end of the fixed handle, and a rotating handle connected to the right end of the fixed handle, wherein a pintle shaft driven by the rotating handle to move laterally is arranged in the fixed sleeve, a left gear and a right gear sleeved on the pintle shaft are arranged between the pintle shaft and the fixed sleeve, a spring is arranged between the left gear and the right gear, a transmission rod is arranged on the right gear along its radial direction, a sliding groove is arranged on the side wall of the right gear, a guide groove is arranged on the side wall of the fixed sleeve, and a guide groove is arranged on the side wall of the pintle shaft Second, the transmission rod is inserted into the slide groove, guide groove 1 and guide groove 2. When the ejector shaft moves to the left, the right gear compresses spring 1 and contacts the left gear. Then, the transmission rod rotates around the axis of the ejector shaft under the joint action of guide groove 1 and guide groove 2, driving the right gear and the left gear to rotate. When the ejector shaft moves to the right, the right gear moves to the right and leaves the left gear under the elastic force of spring 1. The transmission rod rotates in the opposite direction around the axis of the ejector shaft and resets under the joint action of guide groove 1 and guide groove 2, driving the right gear to rotate in the opposite direction and reset.

[0007] In the above-mentioned rotary reamer, the meshing structure of the right gear and the left gear is as follows: the right end of the left gear is evenly distributed with a plurality of sharp teeth on the circumference, and the left end of the right gear is evenly distributed with a plurality of tooth grooves matching the sharp teeth on the circumference, and the right gear drives the left gear to rotate through the meshing of the sharp teeth and the tooth grooves.

[0008] In the above-mentioned rotary reamer, the guide groove one includes a front guide groove one and a rear guide groove one, the front guide groove one is a right triangle with a right angle at the upper left corner, the rear guide groove one is a right triangle with a right angle at the lower left corner, and the lower left corner of the front guide groove one and the upper left corner of the rear guide groove one are at the same height; the guide groove two includes a front guide groove two and a rear guide groove two, the front guide groove two includes a front transverse groove and a front oblique groove connected to the front transverse groove, the front oblique groove is arranged at the upper left of the front transverse groove, the rear guide groove two includes a rear transverse groove and a rear oblique groove connected to the rear transverse groove, the rear oblique groove is arranged at the lower left of the rear transverse groove, and the front transverse groove and the rear transverse groove are at the same height.

[0009] In the above-mentioned rotary reamer, there are two slide grooves, which are respectively arranged on the front and rear sides of the ejector shaft. The front end of the transmission rod is inserted into the front guide groove 2, the slide groove located on the front side of the ejector shaft and the front guide groove 1, and the rear end of the transmission rod is inserted into the rear guide groove 2, the slide groove located on the rear side of the ejector shaft and the rear guide groove 1.

[0010] In the above-mentioned rotary reamer, a mounting boss is provided at the right end of the ejector shaft, and a second spring is provided between the right gear and the mounting boss.

[0011] In the above-mentioned rotary reamer, the rotating handle drives the ejector shaft to move via the connecting shaft, the left end of the connecting shaft is connected to the right end of the ejector shaft, and the right end of the connecting shaft is connected to the rotating handle.

[0012] In the above-mentioned rotary reamer, the ejector shaft is connected to the connecting shaft via a pin, a limiting groove is arranged in the transverse direction on the fixing sleeve, and the pin is slidably arranged in the limiting groove to limit the rotation of the ejector shaft.

[0013] In the above-mentioned rotary reamer, a pull strap is provided between the fixed handle and the rotating handle, the left end of the pull strap is rotationally connected to the fixed handle through pin 1, the right end is rotationally connected to the rotating handle through pin 2, and the connecting shaft is rotationally connected to the rotating handle through pin 3.

[0014] In the above-mentioned rotary reamer, a limit screw threadedly connected to the fixed handle is provided between the fixed handle and the rotating handle, and the head of the limit screw is covered with an elastic protective sleeve.

[0015] In the above-mentioned rotary reamer, the elastic protective sleeve is made of rubber or elastic plastic.

[0016] In the above-mentioned rotary reamer, the left end of the fixed handle is fixedly connected with a connecting sleeve, the right end of the fixed sleeve is fixedly installed in the connecting sleeve, and the guide groove 1 is located in the connecting sleeve.

[0017] In the above-mentioned rotary reamer, the connecting sleeve is threadedly connected to the fixed handle, and the fixed sleeve is threadedly connected to the connecting sleeve.

[0018] In the above-mentioned rotary reamer, a limiting convex edge 1 is provided on the outer periphery of the left gear, and a limiting convex edge 2 is provided on the inner side of the fixed sleeve for limiting the limiting convex edge 1 to the left.

[0019] In the above-mentioned rotary reamer, the left end of the fixed sleeve is connected to a tube expanding mold, and the tube expanding mold includes a mounting sleeve connected to the fixed sleeve, a plurality of tube expanding blocks arranged in the mounting sleeve at the right end, and an annular spring for tightening the tube expanding blocks. A plurality of protrusions are provided at the left end of the left gear along the circumferential direction, and each tube expanding block is provided with a groove matching the protrusion. The left gear drives the tube expanding block to rotate through the protrusions and the grooves.

[0020] The outstanding advantages of the utility model compared with the prior art are:

[0021] 1. The utility model is provided with a left gear and a right gear in the fixed sleeve, a radial transmission rod is provided on the right gear, a guide groove 1 is provided on the fixed sleeve, and a guide groove 2 is provided on the ejector shaft. The lateral movement of the ejector shaft drives the transmission rod and the right gear to perform a rotational reciprocating motion, and the left gear performs a 360° rotational motion, thereby driving the pipe expansion mold to perform a 360° rotational motion. The structural design is ingenious. When the utility model is used, there is no need to manually rotate the pipe, and there is no need to constantly adjust the angle of the reamer. The operation is simple and convenient, and it saves time and effort, and has high work efficiency.

[0022] 2. The right end of the ejector shaft of the utility model is provided with a mounting boss, and a second spring is provided between the right gear and the mounting boss to effectively prevent the right gear from being separated from the first spring, so that the left gear, the first spring and the right gear form a whole, and when the ejector shaft moves to the left, the right gear can be pushed to move to the left, and at the same time, the right gear can move relative to the ejector shaft;

[0023] 3. A limit screw threadedly connected to the fixed handle is provided between the fixed handle and the rotating handle of the utility model. An elastic protective sleeve is provided outside the head of the limit screw to cushion the rotation of the rotating handle and prevent the rotating handle from directly hitting the fixed handle and causing damage. Description of the drawings:

[0024] Figure 1 It is a three-dimensional diagram of the utility model;

[0025] Figure 2 It is an exploded view of the utility model;

[0026] Figure 3 This is a cross-sectional view of the utility model without a tube expansion die and with the ejector shaft at the far right end;

[0027] Figure 4It is a stereoscopic view of the utility model without the tube expansion mold and the connecting sleeve, and the ejector shaft is at the rightmost end;

[0028] Figure 5 This is a cross-sectional view of the utility model when there is no tube expansion mold and the ejector shaft is in the process of moving to the left and the right gear is not rotating;

[0029] Figure 6 It is a stereoscopic diagram of the utility model without the tube expansion mold and the connecting sleeve, with the ejector shaft in the process of moving to the left and the right gear not rotating;

[0030] Figure 7 This is a cross-sectional view of the utility model without a tube expansion mold and with the ejector shaft in the process of moving to the left and after the right gear rotates;

[0031] Figure 8 It is a stereoscopic diagram of the utility model without a tube expansion mold and a connecting sleeve, with the ejector shaft in the process of moving to the left and the right gear rotating;

[0032] Fig. 9 This is a cross-sectional view of the utility model without a tube expansion die and with the ejector shaft at the leftmost end;

[0033] Fig.10 It is a stereoscopic view of the utility model without the tube expansion mold and the connecting sleeve, and the ejector shaft is at the leftmost end;

[0034] Fig.11 It is a cross-sectional view of the utility model without a tube expansion mold, with the ejector shaft in the process of moving rightward and the right gear not reset;

[0035] Fig.12 It is a stereoscopic diagram of the utility model without the tube expansion mold and the connecting sleeve, with the ejector shaft in the process of rightward movement and the right gear not reset;

[0036] Fig.13 It is a stereoscopic diagram of the tube expansion die of the utility model.

[0037] 1. The camshaft is provided with a plurality of camshafts, each of which is provided with a plurality of camshafts, and each of which is provided with a plurality of camshafts. The camshafts are provided with a plurality of camshafts, each of which is provided with a plurality of camshafts. The camshafts are provided with a plurality of camshafts, each of which is provided with a plurality of camshafts. Specific implementation method:

[0038] The present invention is further described below with reference to specific embodiments. Figure 1 —13:

[0039] A rotary reamer comprises a fixed handle 1, a fixed sleeve 2 arranged at the left end of the fixed handle 1, and a rotating handle 3 connected to the right end of the fixed handle 1, wherein a thimble shaft 4 driven by the rotating handle 3 to move laterally is arranged in the fixed sleeve 2, a left gear 5 and a right gear 6 sleeved on the thimble shaft 4 are arranged between the thimble shaft 4 and the fixed sleeve 2, a spring 7 is arranged between the left gear 5 and the right gear 6, a transmission rod 8 is arranged on the right gear 6 along its radial direction, a slide groove 9 is arranged on the side wall of the right gear 6, a guide groove 1 is arranged on the side wall of the fixed sleeve 2, and a guide groove 1 is arranged on the side wall of the thimble shaft 4 Toward groove 2, the transmission rod 8 is inserted in the slide groove 9, the guide groove 1 and the guide groove 2. When the ejector shaft 4 moves to the left, the right gear 6 compresses the spring 1 7 and contacts the left gear 5. Then, the transmission rod 8 rotates around the axis of the ejector shaft 4 under the joint action of the guide groove 1 and the guide groove 2, driving the right gear 6 and the left gear 5 to rotate; when the ejector shaft 4 moves to the right, the right gear 6 moves to the right and leaves the left gear 5 under the elastic force of the spring 1 7. The transmission rod 8 rotates in the opposite direction around the axis of the ejector shaft 4 and resets under the joint action of the guide groove 1 and the guide groove 2, driving the right gear 6 to rotate in the opposite direction and reset.

[0040] The structure of the tube expansion mold: Figure 1 , 2 As shown in Figures 4, 6, 8, 10, 12 and 13, the left end of the fixed sleeve 2 is connected to a tube expanding mold, which includes a mounting sleeve 26 connected to the fixed sleeve 2, a plurality of tube expanding blocks 27 arranged at the right end in the mounting sleeve 26, and an annular spring 28 for clamping the tube expanding blocks 27. The left end of the left gear 5 is provided with a plurality of protrusions 29 along the circumferential direction, and each tube expanding block 27 is provided with a groove 30 matched with the protrusion 29. The left gear 5 drives the tube expanding block 27 to rotate through the protrusion 29 and the groove 30.

[0041] In this embodiment, the front-to-back direction is the longitudinal direction, the left-to-right direction is the transverse direction, and the up-down direction is the vertical direction.

[0042] The working principle of the utility model is as follows: Figure 1-13As shown, the rotating handle 3 is turned to the left, driving the ejector shaft 4 to move to the left, pushing the right gear 6 to compress the spring 1 7 and contact the left gear 5, and then the transmission rod 8 rotates around the axis of the ejector shaft 4 under the joint action of the guide groove 1 and the guide groove 2. Since the transmission rod 8 is inserted in the slide groove 9, the ejector shaft 4 drives the right gear 6 to rotate when it rotates, and the rotation of the right gear 6 drives the left gear 5 to rotate, thereby driving the expansion block 27 to rotate. In this process, the ejector shaft 4 also pushes the expansion block 27 to expand outward; the rotating handle 3 is turned to the right, driving the ejector shaft 4 to move to the right, and the right gear 6 moves to the right and leaves the left gear 5 under the elastic force of the spring 1 7. The transmission rod 8 rotates and resets in the opposite direction around the axis of the ejector shaft 4 under the joint action of the guide groove 1 and the guide groove 2, driving the right gear 6 to rotate and reset in the opposite direction. In this way, the right gear 6 always performs a certain angle of rotational reciprocating motion, and the left gear 5 performs a 360° rotational motion.

[0043] The utility model arranges a left gear 5 and a right gear 6 in a fixed sleeve 2, a radial transmission rod 8 is arranged on the right gear 6, a guide groove 1 is arranged on the fixed sleeve, and a guide groove 2 is arranged on the ejector shaft 4. The lateral movement of the ejector shaft 4 drives the transmission rod 8 and the right gear 6 to perform a rotational reciprocating motion, and the left gear 5 performs a 360° rotational motion, thereby driving the pipe expanding mold to perform a 360° rotational motion. The structural design is ingenious. When the utility model is used, there is no need to manually rotate the pipeline or constantly adjust the angle of the reamer. The operation is simple and convenient, and it saves time and effort, and the work efficiency is high.

[0044] The meshing structure of the right gear and the left gear: the left gear 5 is evenly distributed with a plurality of sharp teeth on the right end circumference, and the right gear 6 is evenly distributed with a plurality of tooth grooves matched with the sharp teeth on the left end circumference. The right gear 6 drives the left gear 5 to rotate through the meshing of the sharp teeth and the tooth grooves.

[0045] The structure of guide groove 1: Figure 2 , 4 As shown in Figures 6, 8, 10 and 12, the guide groove 1 includes a front guide groove 10 and a rear guide groove 11. The front guide groove 10 is a right triangle with a right angle at the upper left corner, and the rear guide groove 11 is a right triangle with a right angle at the lower left corner. The lower left corner of the front guide groove 10 and the upper left corner of the rear guide groove 11 are at the same height.

[0046] The structure of guide groove 2: Figure 2 , 3As shown in Figures 5, 7, 9 and 11, the guide groove 2 includes a front guide groove 12 and a rear guide groove 13, the front guide groove 12 includes a front transverse groove 12a and a front oblique groove 12b connected to the front transverse groove 12a, the front oblique groove 12b is arranged at the upper left of the front transverse groove 12a, the rear guide groove 13 includes a rear transverse groove 13a and a rear oblique groove 13b connected to the rear transverse groove 13a, the rear oblique groove 13b is arranged at the lower left of the rear transverse groove 13a, and the front transverse groove 12a and the rear transverse groove 13a are at the same height.

[0047] When the ejector shaft 4 is at the rightmost end, the right gear 6 does not contact the left gear 5, the front end of the transmission rod 8 is at the upper right corner of the front guide groove 10 and the front inclined groove 12b, and the rear end of the transmission rod 9 is at the lower right corner of the rear guide groove 11 and the rear inclined groove 13b, that is, the transmission rod 8 is in an inclined state, as shown in FIG. Figure 3 , 4 shown.

[0048] When the ejector shaft 4 moves a certain distance to the left, the right gear 6 meshes with the left gear 5, and the transmission rod 8 moves to the left under the push of the front bevel groove 12b and the rear bevel groove 13b until the transmission rod 8 contacts the left end surface of the front guide groove 10 and the rear guide groove 11. At this time, the transmission rod 8 is in an inclined state, as shown in FIG. Figure 5 , 6 shown.

[0049] The ejector shaft 4 continues to move to the left. Since the transmission rod 8 has already come into contact with the left end faces of the front guide groove 10 and the rear guide groove 11, it cannot continue to move to the left. The front end of the transmission rod 8 slides from the front inclined groove 12b to the front transverse groove 12a, and the rear end of the transmission rod 8 slides from the rear inclined groove 13b to the rear transverse groove 13a, that is, the transmission rod 8 is in a horizontal state, that is, the transmission rod 8 rotates a certain angle around the axis of the ejector shaft 4, and the right gear 6 and the left gear 5 rotate together at a certain angle. At this time, the front end of the transmission rod 8 is located at the lower left corner of the front guide groove 10, and the rear end is located at the upper left corner of the rear guide groove 11, completing the rotation of the right gear 6 and the left gear 5. Figure 7 , 8 shown.

[0050] The ejector shaft 4 continues to move leftward to the leftmost end, and the transmission rod 8 is slidably disposed in the front transverse groove 12a and the rear transverse groove 13a. The transmission rod 8 and the right gear 6 and the left gear 5 do not rotate or move. Fig. 9 , 10 shown.

[0051] The ejector shaft 4 moves to the right by a certain distance, and the right gear 6 moves to the right and away from the left gear 5 under the elastic force of the spring 1 7. The transmission rod 8 is slidably arranged in the front transverse groove 12a and the rear transverse groove 13a, and the transmission rod 8 and the right gear 6 do not rotate. Fig.11 , 12 shown.

[0052] The ejector shaft 4 continues to move to the right. Since the transmission rod 8 contacts the leftmost ends of the front transverse groove 12a and the rear transverse groove 13a, the movement of the ejector shaft 4 to the right will drive the transmission rod 8 to move to the right. The front end of the transmission rod 8 moves from the lower left corner to the upper right corner under the guidance of the inclined surface of the front guide groove 10, and the rear end of the transmission rod 8 moves from the upper left corner to the lower right corner under the guidance of the inclined surface of the rear guide groove 11, that is, the transmission rod 8 is in an inclined state, that is, the transmission rod 8 rotates a certain angle around the axis of the ejector shaft 4, and the right gear 6 and the left gear 5 rotate together at a certain angle. At this time, the front end of the transmission rod 8 is located in the front inclined groove 12b, and the rear end is located in the rear inclined groove 13b, completing the reset of the right gear 6.

[0053] Furthermore, two slide grooves 9 are provided, and are respectively arranged on the front and rear sides of the ejector shaft 4. The front end of the transmission rod 8 is inserted into the front guide groove 2 12, the slide groove 9 located on the front side of the ejector shaft 4, and the front guide groove 1 10. The rear end of the transmission rod 8 is inserted into the rear guide groove 2 13, the slide groove 9 located on the rear side of the ejector shaft 4, and the rear guide groove 1 11.

[0054] In order to prevent the right gear 6 from being separated from the spring 1 7 and to make the left gear 5, the spring 1 7 and the right gear 6 form a whole, a mounting boss 14 is provided at the right end of the ejector shaft 4, and a spring 2 15 is provided between the right gear 6 and the mounting boss 14, so that when the ejector shaft 4 moves to the left, the right gear 6 can be pushed to move to the left, and at the same time, the right gear 6 can move relative to the ejector shaft 4.

[0055] The connection structure between the rotating handle 3 and the ejector shaft 4 is as follows: Figure 3-10 As shown, the rotating handle 3 drives the ejector shaft 4 to move through the connecting shaft 16 , the left end of the connecting shaft 16 is connected to the right end of the ejector shaft 4 , and the right end of the connecting shaft 16 is connected to the rotating handle 3 .

[0056] In order to limit the ejector shaft 4 to always move in the lateral direction and not rotate, the ejector shaft 4 is connected to the connecting shaft 16 through a pin 17, and a limiting groove 18 is arranged in the lateral direction on the fixing sleeve 2. The pin 17 is slidably arranged in the limiting groove 18 to limit the rotation of the ejector shaft 4.

[0057] The connection structure of the rotating handle 3, the fixed handle 1 and the connecting shaft 16 is as follows: Figure 3-10 As shown, a drawstring 19 is provided between the fixed handle 1 and the rotating handle 3. The left end of the drawstring 19 is rotationally connected to the fixed handle 1 through a latch 1 20, and the right end is rotationally connected to the rotating handle 3 through a latch 21. The connecting shaft 16 is rotationally connected to the rotating handle 3 through a latch 3 22.

[0058] In order to cushion the rotation of the rotating handle 3 and prevent the rotating handle 3 from directly hitting the fixed handle 1 and causing damage, a limit screw 23 threadedly connected to the fixed handle 1 is provided between the fixed handle 1 and the rotating handle 3, and the head of the limit screw 23 is covered with an elastic protective cover 24.

[0059] Preferably, the material of the elastic protective cover 24 is rubber or elastic plastic. In this embodiment, the material of the elastic protective cover 24 is rubber.

[0060] In order to facilitate the installation of the internal parts of the fixing sleeve 2, the left end of the fixing handle 1 is fixedly connected with a connecting sleeve 25, and the right end of the fixing sleeve 2 is fixedly installed in the connecting sleeve 25. The guide groove 1 is located in the connecting sleeve 25 to effectively prevent the transmission rod 8 from falling out.

[0061] Furthermore, the connecting sleeve 25 is threadedly connected to the fixed handle 1 , and the fixed sleeve 2 is threadedly connected to the connecting sleeve 25 .

[0062] In order to prevent the left gear 5 from escaping from the fixing sleeve 2 , a limiting convex edge 1 31 is provided on the outer periphery of the left gear 5 , and a limiting convex edge 2 32 for limiting the limiting convex edge 1 31 to the left is provided on the inner side of the fixing sleeve 2 .

[0063] The above embodiment is only one of the preferred embodiments of the present utility model, and is not intended to limit the scope of implementation of the present utility model. Therefore, any equivalent changes made based on the shape, structure, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A rotary reamer, characterized in that: The invention comprises a fixed handle (1), a fixed sleeve (2) arranged at the left end of the fixed handle (1), and a rotating handle (3) connected to the right end of the fixed handle (1); a pintle shaft (4) driven by the rotating handle (3) to move laterally is arranged in the fixed sleeve (2); a left gear (5) and a right gear (6) sleeved on the pintle shaft (4) are arranged between the pintle shaft (4) and the fixed sleeve (2); a spring (7) is arranged between the left gear (5) and the right gear (6); a transmission rod (8) is arranged on the right gear (6) along its radial direction; a sliding groove (9) is arranged on the side wall of the right gear (6); a guide groove (1) is arranged on the side wall of the fixed sleeve (2); and a guide groove (2) is arranged on the side wall of the pintle shaft (4). The guide groove 2, the transmission rod (8) is arranged in the slide groove (9), the guide groove 1 and the guide groove 2. When the ejector shaft (4) moves to the left, the right gear (6) compresses the spring 1 (7) and contacts the left gear (5). Then, the transmission rod (8) rotates around the axis of the ejector shaft (4) under the joint action of the guide groove 1 and the guide groove 2, driving the right gear (6) and the left gear (5) to rotate. When the ejector shaft (4) moves to the right, the right gear (6) moves to the right and leaves the left gear (5) under the elastic force of the spring 1 (7). Then, the transmission rod (8) rotates in the opposite direction around the axis of the ejector shaft (4) and resets under the joint action of the guide groove 1 and the guide groove 2, driving the right gear (6) to rotate in the opposite direction and reset.

2. A rotary reamer according to claim 1, characterized in that: The guide groove 1 includes a front guide groove 1 (10) and a rear guide groove 1 (11), the front guide groove 1 (10) is a right triangle with a right angle at the upper left corner, the rear guide groove 1 (11) is a right triangle with a right angle at the lower left corner, the lower left corner of the front guide groove 1 (10) and the upper left corner of the rear guide groove 1 (11) are at the same height; the guide groove 2 includes a front guide groove 2 (12) and a rear guide groove 2 (13), the front guide groove 2 (12) includes a front transverse groove (12a ) and a front oblique groove (12b) connected to the front transverse groove (12a), the front oblique groove (12b) is arranged at the upper left of the front transverse groove (12a), the rear guide groove (13) comprises a rear transverse groove (13a) and a rear oblique groove (13b) connected to the rear transverse groove (13a), the rear oblique groove (13b) is arranged at the lower left of the rear transverse groove (13a), and the front transverse groove (12a) and the rear transverse groove (13a) are at the same height.

3. A rotary reamer according to claim 2, characterized in that: Two slide grooves (9) are provided, and are respectively arranged on the front and rear sides of the ejector shaft (4); the front end of the transmission rod (8) is inserted into the second front guide groove (12), the slide groove (9) located on the front side of the ejector shaft (4), and the first front guide groove (10); the rear end of the transmission rod (8) is inserted into the second rear guide groove (13), the slide groove (9) located on the rear side of the ejector shaft (4), and the first rear guide groove (11).

4. A rotary reamer according to claim 1, characterized in that: The right end of the ejector shaft (4) is provided with a mounting boss (14), and a second spring (15) is provided between the right gear (6) and the mounting boss (14).

5. A rotary reamer according to claim 1, characterized in that: The rotating handle (3) drives the ejector shaft (4) to move via the connecting shaft (16); the left end of the connecting shaft (16) is connected to the right end of the ejector shaft (4), and the right end of the connecting shaft (16) is connected to the rotating handle (3).

6. A rotary reamer according to claim 5, characterized in that: The ejector shaft (4) is connected to the connecting shaft (16) via a pin shaft (17); a limiting groove (18) is arranged in the transverse direction on the fixing sleeve (2); the pin shaft (17) is slidably arranged in the limiting groove (18) to limit the rotation of the ejector shaft (4).

7. A rotary reamer according to claim 5, characterized in that: A drawstring (19) is provided between the fixed handle (1) and the rotating handle (3); the left end of the drawstring (19) is rotationally connected to the fixed handle (1) via a first latch (20), and the right end is rotationally connected to the rotating handle (3) via a second latch (21); the connecting shaft (16) is rotationally connected to the rotating handle (3) via a third latch (22).

8. A rotary reamer according to claim 1, characterized in that: A limit screw (23) threadedly connected to the fixed handle (1) is provided between the fixed handle (1) and the rotating handle (3), and an elastic protective sleeve (24) is sleeved on the head of the limit screw (23).

9. A rotary reamer according to claim 1, characterized in that: The left end of the fixed handle (1) is fixedly connected to a connecting sleeve (25), the right end of the fixed sleeve (2) is fixedly installed in the connecting sleeve (25), and the guide groove 1 is located in the connecting sleeve (25).

10. A rotary reamer according to claim 1, characterized in that: The left end of the fixed sleeve (2) is connected to a tube expansion die, which comprises a mounting sleeve (26) connected to the fixed sleeve (2), a plurality of tube expansion blocks (27) arranged at the right end in the mounting sleeve (26), and an annular spring (28) for clamping the tube expansion blocks (27); the left end of the left gear (5) is provided with a plurality of protrusions (29) along the circumferential direction, each tube expansion block (27) is provided with a groove (30) matched with the protrusion (29); the left gear (5) drives the tube expansion block (27) to rotate through the protrusion (29) and the groove (30).

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