A hollow rotor end face glue injection fixture

Abstract

This invention belongs to the technical field of glue injection equipment, specifically relating to a glue injection fixture for the end face of a hollow rotor, aiming to solve the problem of the lack of a dedicated glue injection channel on the hollow mandrel during glue injection. The invention includes: a stator tube, a hollow rotor mandrel, and a glue injection cone; guide portions are provided on the inner walls of both ends of the stator tube; the glue injection cone includes an insertion portion, a retaining ring, and a rotary valve; an insertion hole is provided through the glue injection cone, and a stepped hole is provided on the wall of the insertion hole; the insertion hole communicates with the stator tube; a gap exists between the outer wall of the connecting rod and the wall of the stepped hole; an inclined glue injection hole is provided through the glue injection cone, and a limiting hole is provided on the retaining ring; a connecting hole is provided on the rotary valve, and the connecting hole is inclined. When the rotary valve is inserted into the limiting hole, the rotary valve rotates to align the connecting hole with the inclined glue injection hole. This invention provides a dedicated glue injection channel for the hollow mandrel during glue injection, facilitating glue injection.

Description

Technical Field

[0001] This invention belongs to the technical field of glue injection equipment, and specifically relates to a glue injection fixture for the end face of a hollow rotor. Background Technology

[0002] Screw drills are commonly used drilling tools for applications such as drilling speed enhancement, anti-deviation drilling, directional drilling, directional drilling, and azimuth correction. They are one of the most frequently used downhole tools in drilling engineering today. Currently, hollow mandrels are used to produce the stators of screw drill motors because they offer higher stator vulcanization efficiency and shorter cooling times. However, our imported glue injection machines, limited by their structure and tooling dimensions, make it difficult to perform glue injection from the stator end face using a hollow mandrel. Since rubber is a poor conductor of heat, during the vulcanization process of thick rubber products such as screw stators, a significant temperature difference occurs between the edges and the center, which persists for a period of time. This temperature difference causes uneven vulcanization, leading to quality problems such as delamination and mechanical property deviations in the rubber products. During use, this can result in peeling and loss of rubber layers, affecting the service life of the screw drill. In oil drilling operations, screw drill bits with stable quality, strong power, and longer service life can effectively reduce the number of tripping operations, lower downhole risks, increase drilling speed, and shorten well completion cycles. These are the higher requirements that drilling companies both domestically and internationally have for screw drill bits. Furthermore, motor stators produced using hollow mandrels can effectively solve many of the drawbacks associated with solid mandrels in stator production, thus improving product quality.

[0003] Currently, hollow mandrels have become the mainstream method for adhesive injection in the domestic screw drill industry. They exhibit significant advantages in many aspects, including tooling processing costs, vulcanization production efficiency, and stator rubber quality. During the adhesive injection process, solid mandrels involve drilling holes on the end face and creating outlet holes circumferentially to inject the adhesive into the stator tube. However, when using hollow mandrels, adhesive injection also needs to be performed between the mandrel and the stator tube, making it easy for the injected adhesive to leak out at the end of the stator tube. Summary of the Invention

[0004] To address the aforementioned problem in the prior art, namely the lack of a dedicated glue injection channel on the hollow mandrel during glue injection, this invention provides a glue injection fixture for the end face of a hollow rotor.

[0005] This application provides a hollow rotor end face glue injection fixture, which adopts the following technical solution:

[0006] A tooling for injecting adhesive into the end face of a hollow rotor includes a stator tube, a hollow rotor mandrel, and an injection cone.

[0007] The stator tube has guide portions on the inner walls at both ends, and the thickness of the stator tube opening is less than the thickness of the tube body.

[0008] The hollow rotor mandrel includes a helical shaft, connecting rods at both ends of the shaft with a diameter smaller than that of the shaft, and mounting rods at the ends of the connecting rods with a diameter smaller than that of the connecting rods; a locking nut is installed on the mounting rod.

[0009] The glue injection cone includes an insertion part that is inserted into the guide part on the stator tube, a retaining ring disposed on one end of the insertion part and having an outer ring diameter larger than the stator tube diameter, and a rotary valve disposed on the retaining ring.

[0010] The injection cone has a through hole, and the wall of the hole has a stepped hole. The connecting rod is inserted into the hole and engages with it. The hole is connected to the stator tube. There is a gap between the outer wall of the connecting rod and the wall of the stepped hole.

[0011] An inclined injection hole is provided through the injection cone head. One end of the inclined injection hole is provided on the retaining ring, and the other end is connected to the stepped hole. A limiting hole is provided on the retaining ring, and the limiting hole is connected to the inclined injection hole. The rotary valve is inserted into the limiting hole and is engaged with the limiting hole. A connecting hole is provided on the rotary valve, and the connecting hole is arranged at an inclination. When the rotary valve is inserted into the limiting hole, the rotary valve rotates to align the connecting hole with the inclined injection hole.

[0012] The locking nut clamps the glue-injecting cone with the stator tube.

[0013] By adopting the above technical solution, the hollow rotor mandrel is first installed in the stator tube. Then, injection cones are installed at both ends of the stator tube, and the injection cones are fitted onto the hollow rotor mandrel. Locking nuts are then fitted onto the hollow rotor mandrel, and tightened to fix the injection cones onto the stator tube. After the injection cones are fixed, they press against the hollow rotor mandrel, fixing its position. A rotary valve is installed in a limiting hole, and a retaining ring is used to restrict the longitudinal movement of the rotary valve. The rotary valve is rotated so that the connecting hole on the rotary valve is aligned with the inclined injection hole. Injection of the adhesive begins, injecting the adhesive into the inclined injection hole. The adhesive enters the insertion hole through the inclined injection hole and the connecting hole, and then enters the space between the stator tube and the hollow rotor mandrel through the through-slot, where it solidifies and forms a hollow mandrel in the stator tube. Before the adhesive solidifies after injection, the rotary valve is rotated to a position where the connecting hole and the inclined injection hole are misaligned, closing the inclined injection hole. The injection cone head is inserted into the stator tube, and the connection compensates for dimensional and positional tolerances, resulting in a higher degree of matching and reducing the risk of end-face glue leakage compared to existing technologies. An inclined injection hole is provided on the injection cone head, further mitigating the risk of end-face glue leakage compared to existing technologies. The inclined injection hole is opened and closed by rotating a rotary valve for vulcanization pressure holding or venting, stabilizing product quality. Compared to existing technologies, this design is simpler, more compact, and easier and more flexible to operate. Before injection, the locking nut is tightly secured, and the high temperature of the rubber body after injection further strengthens the locking nut's tightening force. Removing the nut under these conditions would cause the equipment to operate under overload. By installing an adjusting bearing between the nut and the injection cone head, sliding friction is converted into rolling friction, making nut removal and installation easier and thus extending the equipment's service life.

[0014] By injecting fluid rubber into the inclined injection hole of the injection cone, the injection pressure is concentrated at this position, which reduces the risk of glue leakage at the end face of the stator tube compared with the prior art. Moreover, the inclined injection hole and the injection needle are interlocked for easy glue injection.

[0015] Preferably, the upper end face of the rotary valve has an internal hexagonal screw hole.

[0016] By adopting the above technical solution, it is convenient to rotate the rotary valve.

[0017] Preferably, a limiting groove is formed on the wall of the limiting hole, the limiting groove is located on the upper side of the rotary valve, a retaining ring is installed in the limiting groove, the outer side of the retaining ring is embedded in the limiting groove, and the retaining ring is in contact with the upper side of the rotary valve.

[0018] By adopting the above technical solution, the longitudinal movement of the rotary valve in the limiting hole is restricted.

[0019] Preferably, the retaining ring is a non-closed circular ring.

[0020] By adopting the above technical solution, the retaining ring can be easily deformed as a whole, making it easy to install in the limiting groove.

[0021] Preferably, an adjusting bearing is fitted onto the mounting rod, and the adjusting bearing is installed between the locking nut and the glue injection cone.

[0022] By adopting the above technical solution, the adjusting bearing is installed between the locking nut and the injection cone, which transforms the sliding friction between the locking nut and the injection cone into rolling friction between the locking nut and the adjusting bearing, making it easier to remove the locking nut.

[0023] Preferably, an enlarged groove is provided at the opening of the inclined injection hole.

[0024] By adopting the above technical solution, glue injection can be facilitated.

[0025] Preferably, the upper surface of the rotary valve is provided with a marking groove.

[0026] By adopting the above technical solution, the location of the external flow channel can be monitored.

[0027] Preferably, the end of the connector that is inserted into the stator tube is provided with a guide portion with a diameter smaller than that of the connector.

[0028] By adopting the above technical solution, it is convenient to insert the glue-injecting cone into the stator tube.

[0029] Preferably, the guide portion has a through groove communicating with the stepped hole, and the distance between the through groove and the axis of the glue injection cone is greater than the distance between the outer wall of the connecting rod and the outer wall of the shaft.

[0030] Preferably, multiple through slots are provided, and the multiple through slots are arranged at equal intervals along the circumferential direction on the end face of the guide portion.

[0031] The beneficial effects of this invention are:

[0032] (1) By injecting fluid rubber into the inclined injection hole of the injection cone, the injection pressure is concentrated at this position, which reduces the risk of glue leakage at the end face of the stator tube compared with the prior art. The inclined injection hole and the injection needle are connected to each other, which facilitates glue injection.

[0033] (2) The glue injection cone is inserted into the stator tube and the connection makes up for the form and position tolerances, resulting in a higher degree of matching and reducing the risk of glue leakage at the end face compared with the existing technology.

[0034] (3) The tilted injection hole is opened and closed by rotating the rotary valve, which is used for vulcanization pressure holding or venting to stabilize product quality. Compared with the existing technology, the structure is simpler and more compact, and the operation is more convenient and flexible.

[0035] (4) Before the glue is injected, the locking nut is tightened. After the glue is injected, the high temperature of the rubber body vulcanization makes the locking nut tightening force stronger. In this case, disassembling the nut will cause the equipment to operate under overload. By installing an adjusting bearing between the nut and the glue injection cone, the sliding friction is converted into rolling friction, making the disassembly and assembly of the locking nut easier and thus improving the service life of the equipment. Attached Figure Description

[0036] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0037] Figure 1 This is a schematic diagram of the adhesive injection fixture for the hollow rotor end face in this embodiment;

[0038] Figure 2 This is a schematic diagram of the hollow rotor end face glue injection tool in this embodiment;

[0039] Figure 3 This is a schematic diagram of the adhesive injection cone in this embodiment;

[0040] Figure 4 This is a schematic diagram of the rotary valve in this embodiment;

[0041] Figure 5 This is a schematic diagram of the retaining ring in this embodiment.

[0042] Explanation of reference numerals in the attached drawings: 1. Stator tube; 11. Guide section; 2. Hollow rotor spindle; 21. Shaft body; 22. Connecting rod; 23. Mounting rod; 3. Glue injection cone; 31. Insertion section; 32. Guide section; 33. Retaining ring; 34. Insertion hole; 35. Stepped hole; 36. Through groove; 37. Inclined glue injection hole; 38. Restricting hole; 39. Restricting groove; 4. Rotary valve; 41. Connecting hole; 5. Retaining ring; 6. Locking nut; 7. Adjusting bearing. Detailed Implementation

[0043] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0044] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0045] This invention provides a tooling for injecting adhesive into the end face of a hollow rotor, as shown in the reference. Figure 1A hollow rotor end face glue injection tool includes a stator tube 1, a hollow rotor mandrel 2 is inserted through the stator tube 1, and there is a gap between the hollow rotor mandrel 2 and the inner wall of the stator tube 1. The glue for the glue injection operation is injected into the gap between the hollow rotor mandrel 2 and the inner wall of the stator tube 1 and solidifies to form a hollow mandrel in the stator tube 1.

[0046] Reference Figure 1 , Figure 2 The stator tube 1 has guide portions 11 on the inner walls at both ends. The guide portions 11 extend from the opening of the stator tube 1 toward the center of the tube body. The stator tube 1 has a thickness difference on both sides of the guide portions 11, with the thickness of the opening of the stator tube 1 being less than the thickness of the tube body.

[0047] The hollow rotor mandrel 2 includes a shaft body 21, which is a helical rod type. Connecting rods 22 are provided at both ends of the shaft body 21. The diameter of the connecting rods 22 is smaller than the diameter of the shaft body 21. One end of the connecting rod 22 is fixedly connected to the end of the shaft body 21, and the other end is provided with a mounting rod 23 with a diameter smaller than the diameter of the connecting rod 22. The shaft body 21, connecting rod 22, and mounting rod 23 are integrally formed, and the mounting rod 23 is threaded.

[0048] Glue-injecting cones 3 are inserted into both ends of the stator tube 1. The glue-injecting cones 3 are inserted into and fitted with both ends of the stator tube 1.

[0049] Reference Figure 2 , Figure 3 The glue-injecting cone 3 includes an insertion part 31 that engages with the guide part 11 on the stator tube 1. One end of the insertion part 31 is inserted into the stator tube 1, and when the insertion part 31 is inserted into the stator tube 1, the insertion part 31 is in contact with the guide part 11. A guide part 32 with a diameter smaller than the insertion part 31 is provided at the end of the insertion part 31 inserted into the stator tube 1. The guide part 32 guides the insertion part 31 into the stator tube 1. A retaining ring 33 is provided at the other end of the insertion part 31. The outer ring diameter of the retaining ring 33 is larger than the outer diameter of the stator tube 1. When the insertion part 31 is inserted into the stator tube 1, the retaining ring 33 contacts the end face of the stator tube 1, and the outer ring of the retaining ring 33 extends beyond the outer diameter of the stator tube 1, making it convenient to remove the glue-injecting cone 3 from the stator tube 1 after glue injection.

[0050] The injection cone 3 has a through-hole 34. When the injection cone 3 is inserted into the end of the stator tube 1, it is fitted onto the hollow rotor spindle 2, and the connecting rod 22 of the hollow rotor spindle 2 is inserted into the through-hole 34. The stepped surface between the shaft body 21 and the connecting rod 22 contacts the guide portion 32 on the insertion part 31. The length of the injection cone 3 is the same as the length of the connecting rod 22, so that when the injection cone 3 is fitted onto the connecting rod 22, both ends of the injection cone 3 are aligned with both ends of the connecting rod 22. A stepped hole 35 is formed on the wall of the through-hole 34. The diameter of the stepped hole 35 is larger than that of the through-hole 34, and both ends of the stepped hole 35 are located on the insertion part 31, so that after the connecting rod 22 is inserted into the through-hole 34, there is a gap between the outer wall of the connecting rod 22 and the wall of the stepped hole 35. A through groove 36 is provided on the guide portion 32, which communicates with the stepped hole 35. Multiple through grooves 36 are provided, and they are arranged at equal intervals along the circumference on the end face of the guide portion 32. The distance between the through groove 36 and the axis of the glue injection cone 3 is greater than the distance between the outer wall of the connecting rod 22 and the outer wall of the shaft body 21, so that when the glue injection cone 3 is connected to the hollow rotor core 2, the through groove 36 is exposed on the outside of the shaft body 21.

[0051] An inclined injection hole 37 is provided through the injection cone 3. One end of the inclined injection hole 37 is located on the retaining ring 33, and the other end is connected to the stepped hole 35. The adhesive is injected into the stepped hole 35 through the inclined injection hole 37 and enters the stator tube 1 through the through groove 36, where it solidifies and takes shape. The inclined injection hole 37 is inserted into the injection needle for easy injection.

[0052] A limiting hole 38 is provided on the retaining ring 33. The limiting hole 38 is vertically opened and is connected to the inclined injection hole 37.

[0053] Reference Figure 3 , Figure 4 A rotary valve 4 is installed in the limiting hole 38, and the rotary valve 4 is inserted into the limiting hole 38. A connecting hole 41 is provided on the rotary valve 4, and the connecting hole 41 is arranged at an angle. When the rotary valve 4 is inserted into the limiting hole 38, the rotary valve 4 can rotate to align the connecting hole 41 with the inclined glue injection hole 37. During glue injection, the glue first enters the inclined glue injection hole 37 and contacts the rotary valve 4, then passes through the connecting hole 41 on the rotary valve 4, passes through the rotary valve 4, and enters the stator tube 1 through the latter half of the inclined glue injection hole 37. When the glue injection is completed, rotating the rotary valve 4 causes the connecting hole 41 to be misaligned with the inclined glue injection hole 37, thereby closing the inclined glue injection hole 37 and facilitating the leakage of glue from the inclined glue injection hole 37.

[0054] The upper end face of the rotary valve 4 has an internal hexagonal threaded hole for easy rotation. A limiting groove 39 is formed on the wall of the limiting hole 38, located on the upper side of the rotary valve 4. A retaining ring 5 is installed in the limiting groove 39. Figure 5 The retaining ring 5 is a non-closed circular ring. The outer side of the retaining ring 5 is embedded in the limiting groove 39, and the retaining ring 5 contacts the upper side of the rotary valve 4, limiting the longitudinal movement of the rotary valve 4 in the limiting hole 38. The retaining ring 33 is set as a non-closed circular ring, which makes the retaining ring 33 easy to deform and easy to install in the limiting groove 39.

[0055] Reference Figure 1 , Figure 2 A locking nut 6 is installed on the outside of the glue injection cone 3. The locking nut 6 is sleeved on the mounting rod 23. By adjusting the position of the locking nut 6 on the mounting rod 23, the locking nut 6 can reinforce the installation of the glue injection cone 3 on the stator tube 1.

[0056] In addition, to facilitate the removal of the injection cone 3 after the injection is completed, the hollow mandrel formed in the stator tube 1 can be taken out, and the locking nut 6 can be easily turned, an adjusting bearing 7 is fitted on the mounting rod 23. The adjusting bearing 7 is installed between the locking nut 6 and the injection cone 3, which converts the sliding friction between the locking nut 6 and the injection cone 3 into rolling friction between the locking nut 6 and the adjusting bearing 7, making it easier to remove the locking nut 6.

[0057] To facilitate glue injection, an enlarged groove is provided at the opening of the inclined glue injection hole 37 to increase the diameter of the opening of the inclined glue injection hole 37.

[0058] The method of using the hollow rotor end face glue injection fixture in this application embodiment:

[0059] First, install the hollow rotor mandrel 2 in the stator tube 1. Then, install the glue injection cones 3 at both ends of the stator tube 1. The glue injection cones 3 are sleeved on the hollow rotor mandrel 2. Adjusting bearings 7 and locking nuts 6 are sleeved on the hollow rotor mandrel 2. Tighten the locking nuts 6 to fix the glue injection cones 3 on the stator tube 1. After the glue injection cones 3 are fixed, they press against the hollow rotor mandrel 2 to fix the position of the hollow rotor mandrel 2.

[0060] The rotary valve 4 is installed in the limiting hole 38, and the longitudinal movement of the rotary valve 4 is limited by the retaining ring 5. The rotary valve 4 is rotated so that the connecting hole 41 on the rotary valve 4 is rotated to a position aligned with the inclined glue injection hole 37.

[0061] Begin adhesive injection by injecting the adhesive into the inclined injection hole 37. The adhesive then passes through the inclined injection hole 37 and the connecting hole 41 into the insertion hole 34, and through the through groove 36 into the space between the stator tube 1 and the hollow rotor mandrel 2, where it solidifies and forms a hollow mandrel in the stator tube 1. Before the adhesive has solidified, rotate the rotary valve 4 to a position where the connecting hole 41 is misaligned with the inclined injection hole 37, thus closing the inclined injection hole 37.

[0062] The injection cone 3 is inserted into the stator tube 1, and the connection compensates for dimensional and positional tolerances, resulting in a higher degree of matching and reducing the risk of end-face glue leakage compared to existing technologies. An inclined injection hole 37 is provided on the injection cone 3, further mitigating the risk of end-face glue leakage compared to existing technologies. The inclined injection hole 37 is opened and closed by rotating the rotary valve 4, used for vulcanization pressure holding or venting to stabilize product quality. A marking groove can be set on the upper surface of the rotary valve 4 to enable external monitoring of the flow channel position. Compared to existing technologies, the structure is simpler, more compact, and easier and more flexible to operate. Before injection, the locking nut 6 is tightly locked. After injection, the high temperature of the rubber body vulcanization increases the locking force of the locking nut 6. In this case, disassembling the nut would cause the equipment to operate under overload. By installing an adjusting bearing 7 between the nut and the injection cone 3, sliding friction is converted into rolling friction, making the disassembly and assembly of the locking nut 6 easier and thus extending the equipment's service life.

[0063] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent in such process, method, article, or apparatus / device.

[0064] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A tooling for injecting adhesive into the end face of a hollow rotor, characterized in that: It includes a stator tube (1), a hollow rotor mandrel (2), and a glue-filling cone (3); The stator tube (1) has guide portions (11) on the inner walls at both ends, and the thickness of the stator tube (1) opening is less than the thickness of the tube body. The hollow rotor spindle (2) includes a helical shaft (21), connecting rods (22) with a diameter smaller than that of the shaft (21) and located at both ends of the shaft (21), and mounting rods (23) with a diameter smaller than that of the connecting rods (22) and located at the ends of the connecting rods (22); a locking nut (6) is installed on the mounting rod (23); The glue injection cone (3) includes an insertion part (31) that is inserted into and cooperates with the guide part (11) on the stator tube (1), a retaining ring (33) provided on one end of the insertion part (31) and having an outer ring diameter larger than the diameter of the stator tube (1), and a rotary valve (4) provided on the retaining ring (33); The injection cone (3) has a through hole (34), and a stepped hole (35) is formed on the wall of the hole (34). The connecting rod (22) is inserted into the hole (34) and engages with it. The hole (34) is connected to the stator tube (1). There is a gap between the outer wall of the connecting rod (22) and the wall of the stepped hole (35). An inclined injection hole (37) is provided through the injection cone (3). One end of the inclined injection hole (37) is provided on the retaining ring (33), and the other end is connected to the stepped hole (35). A limiting hole (38) is provided on the retaining ring (33), and the limiting hole (38) is connected to the inclined injection hole (37). The rotary valve (4) is inserted into the limiting hole (38) and is engaged with the limiting hole (38). A connecting hole (41) is provided on the rotary valve (4). The connecting hole (41) is arranged at an inclination. When the rotary valve (4) is inserted into the limiting hole (38), the rotary valve (4) rotates to align the connecting hole (41) with the inclined injection hole (37). The locking nut (6) clamps the glue injection cone (3) with the stator tube (1); The limiting hole (38) has a limiting groove (39) on its wall. The limiting groove (39) is located on the upper side of the rotary valve (4). A retaining ring (5) is installed in the limiting groove (39). The outer side of the retaining ring (5) is embedded in the limiting groove (39), and the retaining ring (5) is in contact with the upper side of the rotary valve (4).

2. The hollow rotor end face glue injection fixture according to claim 1, characterized in that: The upper end face of the rotary valve (4) is provided with an internal hexagonal screw hole.

3. The hollow rotor end face glue injection fixture according to claim 2, characterized in that: The retaining ring (5) is a non-closed circular ring.

4. The hollow rotor end face glue injection fixture according to claim 1, characterized in that: An adjusting bearing (7) is fitted on the mounting rod (23), and the adjusting bearing (7) is installed between the locking nut (6) and the glue injection cone (3).

5. The hollow rotor end face glue injection fixture according to claim 1, characterized in that: An enlarged groove is provided at the opening of the inclined injection hole (37).

6. The hollow rotor end face glue injection fixture according to claim 1, characterized in that: The upper surface of the rotary valve (4) is provided with a marking groove.

7. The hollow rotor end face glue injection fixture according to claim 1, characterized in that: The end of the plug (31) that is inserted into the stator tube (1) is provided with a guide (32) with a diameter smaller than that of the plug (31).

8. The hollow rotor end face glue injection fixture according to claim 7, characterized in that: The guide part (32) is provided with a through groove (36) that communicates with the stepped hole (35). The distance between the through groove (36) and the axis of the glue injection cone (3) is greater than the distance between the outer wall of the connecting rod (22) and the outer wall of the shaft (21).

9. The hollow rotor end face glue injection fixture according to claim 8, characterized in that: Multiple through slots (36) are provided, and the multiple through slots (36) are arranged at equal intervals along the circumferential direction on the end face of the guide part (32).

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