A process method for cold-fitting a spline sleeve

Abstract

The present invention provides a process method for cold-fitting a spline sleeve. Specifically, a hydraulic puller is used to push a cold-fitting spline sleeve tooling, and the tooling squeezes the spline sleeve to install it on the motor shaft. It can cold-fit the spline sleeve of the motor underground without transporting the components outside the mine for installation, solving the technical problem that heating equipment cannot be used to install the spline sleeve underground, saving unnecessary labor costs, improving the efficiency of installing the spline sleeve underground, and indirectly saving the maintenance cost of the roadheader.

Description

Technical Field

[0001] The present invention belongs to the field of machining, and particularly relates to a process method for cold-fitting a spline sleeve. Background Art

[0002] A spline sleeve is a connecting device between a motor and a speed reducer, mainly playing a role in transmission. When the motor needs to be repaired during use, the spline sleeve must be disassembled and assembled. Currently, the spline sleeve and the motor shaft are assembled by heating the spline sleeve. However, in coal mines, there are explosion-proof requirements for all equipment, so open-flame heating cannot be used to assemble the spline sleeve. Therefore, in the current coal mining industry, components such as motors can only be transported outside the mine for assembly, which greatly wastes labor costs and has low efficiency, causing unnecessary waste of resources for coal enterprises. Summary of the Invention

[0003] The purpose of the embodiment of the present invention is to provide a process method for cold-fitting a spline sleeve to overcome the above technical defects.

[0004] To solve the above technical problems, the present invention provides a process method for cold-fitting a spline sleeve, including the following steps.

[0005] Select the shaft for installing the spline sleeve as the target shaft.

[0006] Open an internal threaded hole along the axial center line at the output end face of the target shaft.

[0007] Take a rod-shaped first component. First, pass a connection plate through one end of the rod of the first component, and then pass a front top plate through it, ensuring that the two plates are closely attached. Then, pass a rear top plate through the other end of the rod of the first component. The three plates are parallel to each other, and the connection plate is located between the front top plate and the rear top plate, with a spacing left between the connection plate and the rear top plate.

[0008] Take a rod-shaped second component. Pass one end of the rod of the second component through the front top plate and the connection plate. Screw the other end of the rod of the second component into the internal threaded hole of the target shaft, and a spline sleeve is sleeved on the second component. One end of the spline sleeve faces the output end of the target shaft, and the end face of the other port abuts against the front top plate.

[0009] Align the spline sleeve with the shaft end keyway of the target shaft, and hammer the spline sleeve to position it.

[0010] Take a hydraulic puller, make its three claws rest on the outer diameter of the connection plate, place the push rod of the hydraulic puller correctly and tightly against the center of the rear top plate. Rotate the hydraulic puller, pressurize and move the push rod. The pressure is transmitted to the rear top plate through the push rod, and then sequentially transmitted to the front top plate through the first component and the connection plate. The front top plate squeezes the spline sleeve to move along the target shaft. During the movement, hammer the outer diameter surface of the spline sleeve, and continuously pressurize until the spline sleeve is pressed into the target shaft.

[0011] Further, the front top plate includes a circular front substrate. A through hole A is opened at the center of the circle of the front substrate. Around the through hole A, n through holes A for the first component to pass through are evenly arranged on the plate body of the front substrate, where n is a positive integer.

[0012] Further, the rear top plate includes a circular rear substrate. A boss extends axially along the center of the plate surface of the rear substrate facing away from the connection plate. A through hole B is opened at the common center of the boss and the rear substrate. Around the boss, a plurality of through holes B for the first component to pass through are evenly arranged on the plate body of the rear substrate. The number of the through holes B is the same as that of the through holes A.

[0013] A bolt pair is screwed into the through hole B, and the nut of the bolt pair presses against the boss. The push rod of the hydraulic puller abuts against the center of the nut.

[0014] Further, the connection plate includes a circular connection substrate. A through hole C is opened at the center of the circle of the connection substrate. Around the through hole C, a plurality of through holes C for the first component to pass through are evenly arranged on the plate body of the connection substrate. The number of the through holes C is the same as that of the through holes B.

[0015] Preferably, a steel ring is fixedly connected to the plate surface of the connection substrate facing the rear top plate. All the through holes C are located inside the steel ring, and the axial center line of the steel ring coincides with the axial center line of the connection substrate.

[0016] Preferably, the first component includes a first rod shaft. A rear joint with a thread is provided at one shaft end of the first rod shaft. After the rear joint passes through the through hole B, it is tightened by a nut.

[0017] A front joint with a thread is provided at the other shaft end of the first rod shaft. After the front joint passes through the through hole C, it is screwed into the through hole A.

[0018] Further, the second component includes a second rod shaft. An internal threaded hole is opened along the axial center line at the end surface of one shaft end of the second rod shaft. A screw rod passes through the through hole C and the through hole A, and then the tail of the screw rod is screwed into the internal threaded hole. A nut is screwed onto the head of the screw rod and presses against the connection substrate.

[0019] A bolt pair P is fixedly connected to the end surface of the other shaft end of the second rod shaft. The nut of the bolt pair P is welded to the end surface of the shaft end of the second rod shaft, and the screw rod of the bolt pair P is screwed tightly into the internal threaded hole of the target shaft.

[0020] The beneficial effects of the present invention are as follows:

[0021] The cold installation process method of the spline sleeve provided by the present invention can cold-install the spline sleeve of the motor underground in the mine, without the need to transport the components outside the mine for installation, solves the technical problem that heating equipment cannot be used to install the spline sleeve underground in the mine, saves unnecessary labor costs, improves the installation efficiency of the spline sleeve underground in the mine, and indirectly saves the maintenance cost of the roadheader.

[0022] In order to make the above content of the present invention more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the accompanying drawings, makes a detailed description as follows. Description of the Drawings

[0023] Figure 1 It is an application schematic diagram of an installation tool for a cold-fitted spline sleeve.

[0024] Figure 2 It is a structural schematic diagram of an installation tool for a cold-fitted spline sleeve.

[0025] Figure 3 It is a structural schematic diagram of the front top plate.

[0026] Figure 4 It is a structural schematic diagram of the rear top plate.

[0027] Figure 5 It is a structural schematic diagram of the connecting plate.

[0028] Figure 6 It is a structural schematic diagram of the first component.

[0029] Figure 7 It is a structural schematic diagram of the second component Figure 1 .

[0030] Figure 8 It is a structural schematic diagram of the second component Figure 2 .

[0031] Description of the Reference Numerals:

[0032] 1. Front top plate; 101. Front substrate; 102. Through hole A; 103. Through hole A;

[0033] 2. Rear top plate; 201. Rear substrate; 202. Boss; 203. Through hole B; 204. Through hole B;

[0034] 3. Connecting plate; 301. Connecting substrate; 302. Through hole C; 303. Through hole C; 304. Steel ring;

[0035] 4. First component; 401. First rod shaft; 402. Front joint; 403. Rear joint;

[0036] 5. Second component; 501. Second rod shaft; 502. Internal thread hole; 503. Bolt pair P;

[0037] 6. Hydraulic puller; 7. Spline sleeve; 8. Motor shaft. Detailed Embodiment

[0038] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0039] It should be noted that in the present invention, the up, down, left, and right in the figures are regarded as the up, down, left, and right of the installation tooling of the cold-mounted spline sleeve described in this specification.

[0040] Now, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely, and to fully convey the scope of the present invention to those skilled in the art. The terms in the exemplary embodiments shown in the drawings are not limitations on the present invention. In the drawings, the same units / components are denoted by the same reference numerals.

[0041] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the ordinary meaning understood by those skilled in the art. In addition, it can be understood that the terms defined in the commonly used dictionary should be understood to have a meaning consistent with the context of their related fields, and should not be understood as idealized or overly formal meanings.

[0042] The first embodiment

[0043] This embodiment relates to a process method for cold-mounting a spline sleeve, including the following steps:

[0044] Select the shaft on which the spline sleeve to be installed is located as the target shaft;

[0045] Open an internal screw hole along the axial center line at the output end face of the target shaft;

[0046] Take the rod-shaped first component 4, first pass the connection plate 3 through one rod end of the first component 4, and then pass the front top plate 1 through it, ensuring that the two plates are in close contact. Then pass the rear top plate 2 through the other rod end of the first component 4. The three plates are parallel to each other and the connection plate 3 is located between the front top plate 1 and the rear top plate 2, and there is a gap between the connection plate 3 and the rear top plate 2;

[0047] Take the rod-shaped second component 5, pass one rod end of the second component 5 through the front top plate 1 and the connection plate 3, screw the other rod end of the second component 5 into the internal screw hole of the target shaft, and the second component 5 is sleeved with a spline sleeve 7. One port of the spline sleeve 7 faces the output end of the target shaft, and the end face of the other port abuts against the front top plate 1;

[0048] Align the spline sleeve 7 with the shaft end keyway of the target shaft and hammer the spline sleeve 7 to position it;

[0049] Take the hydraulic puller 6 and make its three jaws rest on the outer diameter of the connecting plate 3. Place the push rod of the hydraulic puller 6 correctly and tightly against the center of the plate of the rear top plate 2. Rotate the hydraulic puller 6, apply pressure to move the push rod, and the pressure is transmitted through the push rod to the rear top plate 2, and then sequentially through the first component 4 and the connecting plate 3 to the front top plate 1. The front top plate 1 squeezes the spline sleeve 7 to move along the target shaft. During the movement, hammer the outer diameter surface of the spline sleeve 7, and continuously apply pressure until the spline sleeve 7 is pressed into the target shaft.

[0050] Taking the motor shaft as the target shaft, as Figure 1 shown, the method of installing the spline sleeve on the motor shaft is as follows:

[0051] Step 1. Open an internal screw hole along the axial center line at the output end of the motor shaft, and screw the shaft end of the second component 5 sleeved with the spline sleeve 7 into this internal screw hole. At this time, one port of the spline sleeve 7 faces the output end of the motor shaft, and the end face of the other port abuts against the front top plate 1. And the spline sleeve 7 is centered with the shaft end keyway of the motor shaft. Hammer the spline sleeve 7 for positioning, and screw the bolt pair into the center of the rear top plate 2. Take the hydraulic puller 6 and place it on the center of the nut of this bolt pair;

[0052] Step 2. Refer to Figure 1 , make the three jaws of the hydraulic puller 6 rest on the outer diameter of the connecting plate 3, place it correctly and tightly, rotate the hydraulic puller 6, tighten the switch of the hydraulic puller 6 clockwise, pull the force increasing rod, and the jack pressure is transmitted through the nut of the bolt pair to the rear top plate 2, and then through the first component 4 to the front top plate 1. The front top plate 1 transmits the pressure to the spline sleeve 7. At the same time, under the action of the hydraulic puller 6, the whole tooling moves axially towards the spline sleeve 7. When it feels relatively strenuous, rotate and hammer the outer diameter surface of the spline sleeve 7 for 1 - 3 circles until the jack is pressed in place, then loosen and reset the switch of the hydraulic puller 6 counterclockwise, and retreat the bolt pair;

[0053] Step 3. Again, place the tip of the hydraulic puller 6, and continuously repeat Step 2 until the spline sleeve 7 is pressed into the motor shaft.

[0054] As Figure 2 shown, the axial center lines of the rear top plate 2, the connecting plate 3, the front top plate 1, the second component 5, the spline sleeve 7 and the motor shaft coincide, so as to ensure that the hydraulic puller 6 can push each plate evenly. In other words, each plate is stressed evenly, and further ensure that the spline sleeve 7 can be pushed towards the motor shaft under the condition of uniform stress to prevent deviation.

[0055] The process of installing the spline sleeve 7 on the motor shaft is completely implemented underground in the mine, and the whole process is cold installation without heating equipment.

[0056] The Second Embodiment

[0057] The process method of the cold-fitted spline sleeve in the first embodiment is mainly completed by the installation tooling for the cold-fitted spline sleeve. The installation tooling for the cold-fitted spline sleeve includes two parallel and spaced-apart plates facing each other, namely the front top plate 1 and the rear top plate 2. As Figure 2 shown, a connecting plate 3 is provided between the two, which is in close contact with the front top plate 1. The three plates are parallel to each other and connected by the first assembly 4, and the connecting plate 3 and the front top plate 1 are also connected by the second assembly 5.

[0058] As Figure 3 shown, the front top plate 1 includes a circular front substrate 101. A through hole A102 is opened at the center of the front substrate 101. Around the through hole A102, n through holes A103 for the first assembly 4 to pass through are evenly arranged on the plate body of the front substrate 101, where n is a positive integer.

[0059] Referring to Figure 2 and Figure 3 , 3 through holes A103 (i.e., n = 3) are opened on the front top plate 1, and their distribution pattern is as Figure 3 shown. This distribution pattern is to ensure uniform stress on the front top plate 1. Each through hole A103 is sleeved with a first assembly 4, that is, there are 3 first assemblies 4. It should be noted that for the convenience of clearly seeing the structure, Figure 2 , Figure 1 and Figure 3 only show 1 first assembly 4.

[0060] Taking the direction shown in Figure 1 as an example, the left plate surface of the front top plate 1 abuts against the end face of the spline sleeve 7, and the right plate surface of the front top plate 1 abuts against the connecting plate 3, which is convenient for transmitting the jacking pressure of the hydraulic puller 6.

[0061] As Figure 4 shown, the rear top plate 2 includes a circular rear substrate 201. A convex platform 202 extends axially from the center of the plate surface of the rear substrate 201 facing away from the connecting plate 3. A through hole B203 is opened at the common center of the convex platform 202 and the rear substrate 201. Around the convex platform 202, a plurality of through holes B204 for the first assembly 4 to pass through are evenly arranged on the plate body of the rear substrate 201. The number of through holes B204 is the same as the number of through holes A103;

[0062] A bolt pair is screwed into the through hole B203, and the nut of the bolt pair presses against the convex platform 202. The push rod of the hydraulic puller 6 abuts against the center of the nut.

[0063] The number of the above-mentioned through holes A103 is 3, so the number of through holes B204 is also 3, and their positions are opposite.

[0064] Referring to Figure 1 and Figure 4, the left plate surface of the rear substrate 201 is flat, while the center of the right plate surface extends to the right to form a boss 202. The through hole B203 of the boss 202 is used to pass through the bolt pair, and the nut of the bolt pair abuts against the tip of the hydraulic puller 6 so as to transmit the jack pressure of the hydraulic puller 6.

[0065] As Figure 5 shown, the connecting plate 3 includes a circular connecting substrate 301. A through hole C302 is opened at the center of the connecting substrate 301. Around the through hole C302, a plurality of through holes C303 for the first component 4 to pass through are evenly arranged on the plate body of the connecting substrate 301. The number of the through holes C303 is the same as the number of the through holes B204, that is, the number of the through holes C303 is 3.

[0066] It should be noted that the above various through holes (through holes A / B / C) are preferably 3, but are not limited thereto, and may also be 4, or 2, or other numbers, that is, they can be adjusted according to actual needs.

[0067] To enhance the stiffness of the connecting substrate 301, a steel ring 304 is fixedly connected to the plate surface of the connecting substrate 301 facing the rear top plate 2. All the through holes C303 are located within the steel ring 304, and the axial center line of the steel ring 304 coincides with the axial center line of the connecting substrate 301.

[0068] From Figure 2 or Figure 1 it can be seen that the diameter of the connecting substrate 301 is larger than the diameter of the front substrate 101. The reason is that the left plate surface of the connecting substrate 301 is used to lap the three jaws of the hydraulic puller 6, and the diameter of the front substrate 101 is larger than the end face diameter of the spline sleeve 7 abutted against it. The purpose is to ensure that the pressure is completely transmitted to the spline sleeve 7.

[0069] As Figure 6 shown, the first component 4 includes a first rod shaft 401. One shaft end of the first rod shaft 401 is provided with a rear joint 403 having a thread. After the rear joint 403 passes through the through hole B204, it is tightened by a nut;

[0070] The other shaft end of the first rod shaft 401 is provided with a front joint 402 having a thread. After the front joint 402 passes through the through hole C303, it is screwed into the through hole A103.

[0071] As Figure 1 shown, after the rear joint 403 passes through the through hole B204, a nut is screwed, and after the front joint 402 passes through the through hole C303, it is screwed into the through hole A103. That is, the through hole A103 has an internal thread, and the through holes B204 and C303 can be through holes.

[0072] As Figure 7 and Figure 8As shown, the second component 5 includes a second rod shaft 501. An internal threaded hole 502 is formed along the axial center line on the end face of one shaft end of the second rod shaft 501. A screw rod is passed through the through hole C302 and the through hole A102, and then the tail of the screw rod is screwed into the internal threaded hole 502. A nut is screwed onto the head of the screw rod and pressed against the connection substrate 301.

[0073] On the end face of the other shaft end of the second rod shaft 501, a bolt pair P503 is fixedly connected. The nut of the bolt pair P503 is welded to the end face of the shaft end of the second rod shaft 501, and the screw rod of the bolt pair P503 is screwed into the internal threaded hole of the target shaft.

[0074] The shaft end of the second rod shaft 501 (the shaft end where the internal threaded hole 502 is located) passes through the through hole A102 of the front substrate 101 and the through hole C302 of the connection substrate 301, and then a bolt is screwed into the internal threaded hole 502, and a nut is screwed onto the bolt. The nut is located on the right plate surface of the connection substrate 301 and inside the steel ring 304.

[0075] The bolt of the bolt pair P503 needs to be screwed into the internal threaded hole of the motor shaft.

[0076] The spline sleeve 7 is the final pressure transfer position during the cold installation process.

[0077] According to Figure 7 and Figure 8 it can be seen that the second component 5 can have two different sizes to meet the cold installation of spline sleeves 7 of different lengths. As Figure 1 shown, the second component 5 is to connect the Figure 7 and Figure 8 structures to adapt to the length of the spline sleeve 7 in Figure 1 . During actual use, second components 5 of different sizes can be prefabricated to be applied to spline sleeves 7 of various sizes.

[0078] The size of the installation tool for the cold-installed spline sleeve can be modified according to the size of the spline sleeve 7. Considering the spatial changes in the installation environment, it only requires one person to operate (and / or one person to assist) to complete during use.

[0079] The usage method of the installation tool for the cold-installed spline sleeve in this embodiment is as follows:

[0080] Step I. An internal threaded hole is formed along the axial center line on the output end face of the motor shaft. The shaft end of the second component 5 sleeved with the spline sleeve 7 is screwed into this internal threaded hole. Specifically, the bolt of the bolt pair P503 is screwed into the internal threaded hole. At this time, one port of the spline sleeve 7 faces the output end of the motor shaft, and the end face of the other port abuts against the left plate surface of the front top plate 1. And the spline sleeve 7 is centered with the keyway of the shaft end of the motor shaft. The spline sleeve 7 is positioned by hammering. A bolt pair is screwed into the through hole B203 of the rear top plate 2, and a hydraulic puller 6 is placed on the center of the nut of the bolt pair.

[0081] Step Ⅱ. Refer to Figure 1 , place the three jaws of the hydraulic puller 6 on the outer diameter of the connecting plate 3, align and tighten it. Rotate the hydraulic puller 6, tighten the switch of the hydraulic puller 6 clockwise, pull the force-increasing rod. The jack pressure is transmitted to the rear top plate 2 through the nut of the bolt pair, and then transmitted to the front top plate 1 through the first assembly 4. The front top plate 1 transmits the pressure to the spline sleeve 7. At the same time, under the action of the hydraulic puller 6, the whole tooling moves axially towards the spline sleeve 7. When it feels strenuous, rotate and hammer the outer diameter surface of the spline sleeve 7 for 1 - 3 circles until the jack is pressed in place, then loosen and reset the switch of the hydraulic puller 6 counterclockwise, and retract the bolt pair;

[0082] Step Ⅲ. Again, make the tip of the hydraulic puller 6 touch, and continuously repeat Step Ⅱ until the spline sleeve 7 is pressed onto the motor shaft.

[0083] When cold-fitting the spline sleeve 7, attention should be paid to:

[0084] a. If the internal thread of the motor shaft is blocked, it must be reamed with a tap first;

[0085] b. Use sandpaper to remove the rust on the outer diameter surface of the motor shaft end until it is smooth. If there are protruding high points on the surface, file off the high points with a flat file;

[0086] c. Apply an appropriate amount of machine oil to lubricate the outer diameter of the motor shaft end to facilitate assembly;

[0087] d. It is strictly prohibited to use brute force to pull hard to avoid damaging the internal thread or breaking the bolt.

[0088] Those of ordinary skill in the art can understand that the above embodiments are specific examples for implementing the present invention, and in practical applications, various changes can be made in form and details without departing from the spirit and scope of the present invention.

Claims

1. A process method for cold-fitting a spline sleeve, characterized in that, It includes the following steps: Select the shaft where the spline sleeve is to be installed as the target shaft; On the end face of the output end of the target shaft, an internal threaded hole is opened along its axial center line; Take the rod-shaped first component (4). First, pass the connecting plate (3) through one rod end of the first component (4), and then pass the front top plate (1) through. Ensure that the two plates are in close contact. Then, pass the rear top plate (2) through the other rod end of the first component (4). The three plates are parallel to each other and the connecting plate (3) is located between the front top plate (1) and the rear top plate (2), and there is a gap between the connecting plate (3) and the rear top plate (2); Take the rod-shaped second component (5). One rod end of the second component (5) passes through the front top plate (1) and the connecting plate (3). The other rod end of the second component (5) is screwed into the internal threaded hole of the target shaft, and a spline sleeve (7) is sleeved on the second component (5). One port of the spline sleeve (7) faces the output end of the target shaft, and the end face of the other port abuts against the front top plate (1); Align the spline sleeve (7) with the shaft end keyway of the target shaft, and hammer the spline sleeve (7) to position it; Take the hydraulic puller (6) and make its three claws rest on the outer diameter of the connecting plate (3). The push rod of the hydraulic puller (6) is placed correctly and tightly against the center of the plate of the rear top plate (2). Rotate the hydraulic puller (6), pressurize and move the push rod. The pressure is transmitted to the rear top plate (2) through the push rod, and then sequentially transmitted to the front top plate (1) through the first component (4) and the connecting plate (3). The front top plate (1) squeezes the spline sleeve (7) to move along the target shaft. During the movement, hammer the outer diameter surface of the spline sleeve (7), and continuously pressurize until the spline sleeve (7) is pressed into the target shaft; The front top plate (1) includes a circular front base plate (101). A through hole A (102) is opened at the center of the front base plate (101). Around the through hole A (102), a through hole A (103) for the first component (4) to pass through is opened on the plate body of the front base plate (101); The rear top plate (2) includes a circular rear base plate (201). A plurality of through holes B (204) for the first component (4) to pass through are uniformly arranged on the plate body of the rear base plate (201). The number of through holes B (204) is the same as the number of through holes A (103); The connecting plate (3) includes a circular connecting base plate (301). A through hole C (302) is opened at the center of the connecting base plate (301). Around the through hole C (302), a plurality of through holes C (303) for the first component (4) to pass through are uniformly arranged on the plate body of the connecting base plate (301); The first component (4) includes a first rod shaft (401). One shaft end of the first rod shaft (401) is provided with a rear joint (403) with threads. After the rear joint (403) passes through the through hole B (204), it is tightened by a nut. The other shaft end of the first rod shaft (401) is provided with a front joint (402) with threads. After the front joint (402) passes through the through hole C (303), it is screwed into the through hole A (103); The second component (5) includes a second rod shaft (501). An internal threaded hole (502) is formed in one end face of the second rod shaft (501) along the axial center line. After a screw rod passes through the through hole C (302) and the through hole A (102), the tail of the screw rod is screwed into the internal threaded hole (502), and a nut is screwed onto the head of the screw rod and presses the connecting substrate (301).

2. The process method of the cold-fitted spline sleeve according to claim 1, characterized in that, Around the through hole A (102), n through holes A (103) for the first component (4) to pass through are formed in the plate body of the front substrate (101), where n is a positive integer and the through holes A (103) are evenly distributed.

3. The process method of the cold-mounted spline sleeve according to claim 2, characterized in that, A boss (202) extends axially from the center of the plate surface of the rear substrate (201) facing away from the connecting plate (3). A through hole B (203) is formed at the common center of the boss (202) and the rear substrate (201). A plurality of through holes B (204) are evenly distributed around the boss (202). A bolt pair is screwed into the through hole B (203), and the nut of the bolt pair presses the boss (202). The push rod of the hydraulic puller (6) abuts against the center of the nut.

4. The process method of the cold-mounted spline sleeve according to claim 3, characterized in that, The number of through holes C (303) is the same as the number of through holes B (204).

5. The process method of the cold-fitted spline sleeve according to claim 4, characterized in that, A steel ring (304) is fixedly connected to the plate surface of the connecting substrate (301) facing the rear top plate (2). All the through holes C (303) are located within the steel ring (304), and the axial center line of the steel ring (304) coincides with the axial center line of the connecting substrate (301).

6. The process method of the cold-fitted spline sleeve according to claim 4, characterized in that, A bolt pair P (503) is fixedly connected to the other end face of the second rod shaft (501). The nut of the bolt pair P (503) is welded to the end face of the shaft of the second rod shaft (501), and the screw rod of the bolt pair P (503) is tightened into the internal threaded hole of the target shaft.

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