Tool for mounting shaft sleeve on large shaft

Abstract

The utility model discloses a tool for installing a shaft sleeve on a large shaft, and belongs to the technical field of mechanical assembly, and the key points of the technical scheme are that the tool comprises a base, the base comprises a bottom plate and a supporting frame, the supporting frame is connected with the bottom plate, and the supporting frame is used for placing the shaft sleeve; the limiting plate is connected with the supporting frame and used for limiting the shaft sleeve; the positioning device comprises a plurality of positioning rods and a plurality of sleeves installed on a large shaft, the positioning rods are vertically arranged, all the positioning rods are connected with the bottom plate and distributed around the supporting frame, the positioning rods penetrate through the sleeves, and the inner diameter of each sleeve is matched with the outer diameter of the corresponding positioning rod; and the multiple bearing blocks are connected with the bottom plate, distributed around the supporting frame and used for bearing the large shaft, and the effects that the precision and efficiency of installing the shaft sleeve on the large shaft are improved, and the manual operation intensity is reduced are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical assembly, in particular to a tool for installing a shaft sleeve on a large shaft. BACKGROUND

[0002] With the development of modern industry, the demand for large-scale mechanical equipment is increasing, especially for heavy equipment that requires high precision and high reliability. In the assembly process of large-scale mechanical equipment, ensuring the accurate installation of parts is crucial to the performance of the entire equipment. One of the core components of these devices is the large shaft, which usually needs to form a tight interference fit with the shaft sleeve to ensure smooth operation and efficiency. However, in the traditional installation process, due to the large size of the large shaft and the shaft sleeve, the uneven contact of the mating surface leads to the problem of difficult assembly and low efficiency, which not only increases the production cost, but also limits the improvement of production efficiency. CONTENT OF THE UTILITY MODEL

[0003] In order to improve the precision and efficiency of installing a shaft sleeve on a large shaft and reduce the intensity of manual operation, the utility model provides a tool for installing a shaft sleeve on a large shaft.

[0004] The tool for installing a shaft sleeve on a large shaft provided by the utility model adopts the following technical scheme:

[0005] A tool for installing a shaft sleeve on a large shaft, comprising a base, the base comprising a bottom plate and a support frame, the support frame being connected with the bottom plate, the support frame being used for placing a shaft sleeve;

[0006] A limiting plate connected with the support frame and used for limiting the shaft sleeve;

[0007] A positioning device comprising a plurality of positioning rods and a plurality of sleeves mounted on the large shaft, the positioning rods being vertically arranged, the plurality of positioning rods being connected with the bottom plate and distributed around the support frame, the positioning rods penetrating through the sleeves, the inner diameter of the sleeves matching the outer diameter of the positioning rods;

[0008] A plurality of bearing blocks are provided, the plurality of bearing blocks being connected with the bottom plate and distributed around the support frame, and used for bearing the large shaft.

[0009] By adopting the technical scheme, the shaft sleeve is cooled and shrunk first, then placed on the support frame and accurately positioned by the limiting plate. Then the heated and expanded large shaft sleeve is placed on the already shrunk shaft sleeve, realizing the interference fit of the large shaft and the shaft sleeve, and the accurate positioning of the installation of the large shaft is realized by the positioning device. The combination design of the base, the support frame, the limiting plate, the positioning device and the bearing block realizes the accurate positioning and stable support of the large shaft and the shaft sleeve, and solves the problems of large assembly difficulty and low efficiency caused by large size in the traditional installation process. Specifically, the design of the base makes the tooling have a stable support structure, ensuring the stability of the shaft sleeve during installation. The limiting plate cooperates with the support frame to accurately limit the shaft sleeve in the axial and radial directions, realizing the accurate positioning of the shaft sleeve and further reducing the possibility of deviation during installation. The positioning device realizes the accurate positioning of the large shaft by the cooperation of multiple positioning rods and sleeves, thereby ensuring that the shaft sleeve can be accurately installed to the specified position. The setting of multiple bearing blocks not only can uniformly disperse the weight of the large shaft, reduce the deformation caused by excessive local stress, but also can further improve the overall stability of the tooling.

[0010] Preferably, the limiting plate is arranged inside the shaft sleeve, and the limiting plate comprises a plurality of limiting portions, the diameter of the limiting portion of the limiting plate matches the inner diameter of the shaft sleeve, and the limiting portion is chamfered.

[0011] By adopting the technical scheme, the limiting portion effectively prevents the shaft sleeve from deviating during installation, ensuring that the shaft sleeve is accurately aligned with the large shaft. The chamfer design has a guiding effect, facilitating the placement and accurate positioning of the shaft sleeve, while reducing the friction between the shaft sleeve and the limiting portion, reducing the risk of damage and improving the assembly efficiency and quality.

[0012] Preferably, the bottom plate is connected with a limiting device for limiting the shaft sleeve in the vertical direction, the limiting device comprises a mounting block, a pull rod, a connecting rod, a reinforcing rod and a mounting frame, the mounting block is connected with the bottom plate, the pull rod passes through the mounting block and the support frame, and the pull rod is slidingly connected with the mounting block; the connecting rod is arranged inside the shaft sleeve, one end of the connecting rod is fixedly connected with the pull rod, the other end is connected with the reinforcing rod, the mounting frame is connected with the support frame, the reinforcing rod passes through the mounting frame and is slidingly connected with the mounting frame, and when the reinforcing rod protrudes from the mounting frame and abuts against the top of the shaft sleeve, the shaft sleeve can be limited.

[0013] By adopting the technical scheme, the tool can effectively limit the shaft sleeve in the vertical direction, ensuring that the shaft sleeve does not move in the vertical direction during installation, thereby improving installation precision and stability. Specifically, the design of the limiting device allows the pull rod to adjust the position by sliding, and the coordinated movement of the connecting rod and the reinforcing rod allows the reinforcing rod to extend out of the mounting frame and overlap the top surface of the shaft sleeve, ultimately achieving effective limiting of the top of the shaft sleeve, further enhancing the limiting effect and reducing the possibility of loosening or deviation of the shaft sleeve during installation.

[0014] Preferably, the pull rod is connected with a handle.

[0015] By adopting the technical scheme, the pull rod is connected with a handle, making it easier for the operator to pull the pull rod, thereby achieving effective limiting of the top of the shaft sleeve and improving the operation convenience and work efficiency of the tool.

[0016] Preferably, the lengths of the plurality of positioning rods are different.

[0017] By adopting the technical scheme, when hoisting the large shaft and sleeving the sleeve on the large shaft onto the positioning rod, the large shaft is slowly lowered, and the position of the large shaft is adjusted in order from high to low, until all the positioning rods are inserted into the sleeve, achieving precise positioning of the large shaft installation, which is simple to operate and has high positioning efficiency.

[0018] Preferably, the top end of the positioning rod is provided with a guide portion, and the diameter of the guide portion gradually decreases from the bottom end to the top end.

[0019] By adopting the technical scheme, the design of the guide portion makes it easier for the positioning rod to be inserted into the sleeve, improving the assembly efficiency of the tool. The diameter of the guide portion gradually decreases from the bottom end to the top end, which helps to reduce the friction between the positioning rod and the sleeve, further ensuring that the positioning rod smoothly enters the sleeve, thereby ensuring the precise positioning of the large shaft and the shaft sleeve.

[0020] Preferably, the bottom end of the sleeve is provided with a positioning portion with an outer diameter greater than the diameter of the flange through hole of the large shaft, the sleeve is connected with the large shaft through a fixing device, the fixing device includes a first clamping plate, a second clamping plate and an adjusting assembly, the first clamping plate abuts against the top of the flange of the large shaft, the first clamping plate is provided with a first clamping groove, the sleeve is clamped in the first clamping groove, the second clamping plate abuts against the bottom end of the positioning portion, the second clamping plate is provided with a second clamping groove, the second clamping groove can allow the positioning rod to pass through and extend into the sleeve, and the adjusting assembly is connected with the first clamping plate at one end and connected with the second clamping plate at the other end, achieving the fixation of the sleeve and the large shaft.

[0021] By adopting the technical scheme, the sleeve is directly inserted into the through hole of the large shaft flange during installation, the positioning part at the bottom end of the sleeve is designed to limit the installation of the sleeve, and the sleeve is stably connected with the large shaft through the ingenious design of the fixing device.

[0022] Preferably, the adjusting assembly comprises a first adjusting plate, a second adjusting plate and an adjusting bolt, the first adjusting plate is connected with the first clamping plate, the second adjusting plate is connected with the second clamping plate, the first adjusting plate and the second adjusting plate are arranged in a staggered manner, the first adjusting plate is connected with an adjusting nut, the second adjusting plate is provided with a sliding hole, the adjusting bolt passes through the sliding hole and is threadedly connected with the first adjusting plate and the adjusting nut, the position of the first adjusting plate and the second adjusting plate can be adjusted, and the first adjusting plate and the second adjusting plate are fixed when the adjusting bolt abuts against the second adjusting plate.

[0023] By adopting the technical scheme, the sliding connection structure between the first adjusting plate and the second adjusting plate enables the adjusting assembly to be fixed at different positions, thereby adapting to large shaft flanges of different sizes and improving the application range and flexibility of the tooling.

[0024] Preferably, a protective pad is arranged between the support frame and the shaft sleeve, and the protective pad is connected with the support frame and abuts against the shaft sleeve.

[0025] By adopting the technical scheme, the arrangement of the protective pad can effectively reduce the rigid contact between the support frame and the shaft sleeve, reduce the possibility of wear or scratch on the surface of the shaft sleeve due to direct contact, thereby improving the service life and assembly quality of the shaft sleeve.

[0026] In summary, the present application has the following advantages:

[0027] The shaft sleeve is cooled and shrunk first, then placed on the support frame and accurately positioned through the limiting plate. The heated and expanded large shaft sleeve is placed on the already shrunk shaft sleeve, realizing the interference fit of the large shaft and the shaft sleeve, and the large shaft is accurately positioned through the positioning device. The tooling realizes accurate positioning and stable support of the large shaft and the shaft sleeve through the combined design of the base, support frame, limiting plate, positioning device and bearing block, solving the problems of large assembly difficulty and low efficiency caused by large size in the traditional installation process. Specifically: the design of the base makes the tooling have a stable support structure, ensuring the stability of the shaft sleeve during installation. The limiting plate cooperates with the support frame to accurately limit the shaft sleeve in the axial and radial directions, realizing accurate positioning of the shaft sleeve and reducing the possibility of deviation during installation. The positioning device realizes accurate positioning of the large shaft through the cooperation of multiple positioning rods and sleeves, thereby ensuring that the shaft sleeve can be accurately installed to the specified position. The arrangement of multiple bearing blocks not only uniformly disperses the weight of the large shaft, reducing deformation caused by excessive local stress, but also further improves the overall stability of the tooling. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of a tooling for installing a shaft sleeve on a large shaft.

[0029] Figure 2 It is a state diagram of the shaft sleeve placed on the support frame.

[0030] Figure 3 It is a state diagram of the fixing device installed on the large shaft.

[0031] Figure 4 It is a position diagram of the limiting plate.

[0032] Figure 5 It is a top view of a tooling for installing a shaft sleeve on a large shaft.

[0033] Figure 6 It is Figure 5 a sectional view cut along the direction A-A in

[0034] Figure 7 It is a front view of a tooling for installing a shaft sleeve on a large shaft.

[0035] Figure 8 It is a structure diagram of the fixing device.

[0036] Explanation of reference signs:

[0037] 1, base; 11, bottom plate; 12, support frame; 2, limiting plate; 21, limiting part; 3, protective pad; 4, limiting device; 41, mounting block; 42, pull rod; 421, handle; 43, connecting rod; 44, reinforcing rod; 45, mounting frame; 5, positioning device; 51, positioning rod; 52, sleeve; 521, positioning part; 6, bearing block; 7, fixing device; 71, first clamping plate; 711, first clamping groove; 72, second clamping plate; 721, second clamping groove; 73, adjusting assembly; 731, first adjusting plate; 732, second adjusting plate; 7321, sliding hole; 733, adjusting bolt; 8, first baffle; 9, second baffle. DETAILED DESCRIPTION

[0038] The utility model will be further explained in detail below in combination with the drawings.

[0039] A tool for installing a shaft sleeve on a large shaft, referring to Figure 1 , Figure 2 and Figure 3 , comprising a base 1, a limiting plate 2, a positioning device 5 and a bearing block 6. The base 1 comprises a bottom plate 11 and a support frame 12, the support frame 12 is connected with the bottom plate 11, and the support frame 12 is used for placing the shaft sleeve. The limiting plate 2 is connected with the support frame 12 and is used for limiting the shaft sleeve. The positioning device 5 comprises a plurality of positioning rods 51 and a plurality of sleeves 52 mounted on the large shaft, the positioning rods 51 are vertically arranged, the plurality of positioning rods 51 are connected with the bottom plate 11 and are distributed around the support frame 12, the positioning rods 51 pass through the sleeves 52, and the inner diameter of the sleeve 52 matches the outer diameter of the positioning rod 51. The bearing block 6 is provided in plurality, the plurality of bearing blocks 6 are connected with the bottom plate 11 and are distributed around the support frame 12, and are used for bearing the large shaft.

[0040] In use, the shaft sleeve is cooled and shrunk first, then placed on the support frame 12, and precisely positioned through the limiting plate 2. Then the heated and expanded shaft sleeve is placed on the already shrunk shaft sleeve, realizing the interference fit of the large shaft and the shaft sleeve, and the precise positioning of the installation of the large shaft is realized through the positioning device 5. The tool realizes the precise positioning and stable support of the large shaft and the shaft sleeve through the combined design of the base 1, the support frame 12, the limiting plate 2, the positioning device 5 and the bearing block 6, and solves the problems of large assembly difficulty and low efficiency in the traditional installation process due to large size.

[0041] Referring to Figure 2 and Figure 4 , the bottom plate 11 is horizontally placed, and the support frame 12 is provided on the top of the bottom plate 11 and is hollow. The support frame 12 is fixedly connected with the protective pad 3 on the top, and the protective pad 3 is provided around the limiting plate 2. The shaft sleeve abuts against the protective pad 3, reducing the possibility of wear or scratch on the surface of the shaft sleeve due to direct contact, thereby improving the service life and assembly quality of the shaft sleeve.

[0042] Referring to Figure 2、 Figure 5 and Figure 6 The limiting plate 2 is arranged inside the shaft sleeve, and the top of the limiting plate 2 is higher than the top of the protection pad 3. The limiting plate 2 is provided with a plurality of limiting portions 21, and the diameter of the limiting portion 21 of the limiting plate 2 matches the inner diameter of the shaft sleeve. The limiting portion 21 is chamfered. In this embodiment, three limiting portions 21 are provided, and the three limiting portions 21 are uniformly distributed along the circumference of the limiting plate 2.

[0043] The limiting portion 21 effectively prevents the shaft sleeve from deviating during installation, ensuring that the shaft sleeve is accurately aligned with the large shaft. The chamfered design has a guiding effect, facilitating the placement and precise positioning of the shaft sleeve. At the same time, it reduces the friction between the shaft sleeve and the limiting portion 21, reduces the risk of damage, and improves assembly efficiency and quality.

[0044] Referring to Figure 5 and Figure 6 The bottom plate 11 is connected to the limiting device 4, and the limiting device 4 is provided with three groups. The three groups of limiting devices 4 are uniformly distributed around the circumference of the shaft sleeve. The limiting device 4 is arranged in a staggered manner with the positioning device 5.

[0045] Referring to Figure 6 The limiting device 4 includes a mounting block 41, a pull rod 42, a connecting rod 43, a reinforcing rod 44, and a mounting bracket 45. The mounting block 41 is provided with a plurality of mounting blocks, and is fixedly connected with the bottom plate 11. The pull rod 42 is horizontally arranged, and the first end of the pull rod 42 penetrates through the mounting block 41 and is slidably connected with the mounting block 41. The first end of the pull rod 42 extends into the inside of the support frame 12. The second end of the pull rod 42 is fixedly connected with a handle 421.

[0046] Referring to Figure 6 The connecting rod 43 is vertically arranged inside the support frame 12, and the bottom end of the connecting rod 43 is fixedly connected with the pull rod 42, and the top end is fixedly connected with the reinforcing rod 44. The reinforcing rod 44 is horizontally arranged, and the reinforcing rod 44 and the pull rod 42 are located on the same vertical plane. The mounting bracket 45 is fixedly connected with the top of the limiting plate 2. The reinforcing rod 44 penetrates through the mounting bracket 45 and is slidably connected with the mounting bracket 45. The bottom of the reinforcing rod 44 matches the top of the shaft sleeve. When the pull rod 42 is pulled away from the connecting rod 43, the reinforcing rod 44 extends and overlaps with the top surface of the shaft sleeve.

[0047] The tool can effectively limit the shaft sleeve in the vertical direction, ensuring that the shaft sleeve does not move in the vertical direction during installation, thereby improving installation accuracy and stability.

[0048] Referring to Figure 7 In this embodiment, three positioning rods 51 are vertically arranged, and the three positioning rods 51 are spaced apart around the support frame 12. The height of each positioning rod 51 is different.

[0049] When the sleeve 52 on the large shaft is sleeved on the positioning rod 51 during hoisting of the large shaft, the large shaft is slowly lowered, the position of the large shaft is adjusted in sequence from high to low according to the positioning rod 51, until all the positioning rods 51 are inserted into the sleeve 52, realizing accurate positioning of the large shaft installation, which is simple to operate and has high positioning efficiency.

[0050] With reference to Figure 7 , the top end of the positioning rod 51 is provided with a guide portion, and the diameter of the guide portion gradually decreases from the bottom end to the top end.

[0051] The design of the guide portion makes the positioning rod 51 more easily inserted into the sleeve 52, improving the assembly efficiency of the tooling.

[0052] With reference to Figure 3 and Figure 5 , in the embodiment, the bearing blocks 6 are provided in six, and every two bearing blocks 6 are arranged as a group. The three groups of bearing blocks 6 correspond to the three positioning rods 51 one by one, and the two bearing blocks 6 in the same group are respectively arranged around the positioning rod 51.

[0053] The arrangement of the plurality of bearing blocks 6 not only uniformly disperses the weight of the large shaft, reduces deformation caused by excessive local stress, but also further improves the overall stability of the tooling.

[0054] With reference to Figure 1 , Figure 3 and Figure 8 , in the embodiment, the sleeve 52 is provided in three, and the three sleeves 52 correspond to the three positioning rods 51 one by one. The sleeve 52 vertically penetrates the through hole of the large shaft flange, and the bottom of the sleeve 52 is provided with a positioning portion 521, the outer diameter of the positioning portion 521 is greater than the diameter of the through hole of the large shaft flange, and the positioning portion 521 abuts against the bottom of the large shaft.

[0055] When the sleeve 52 is installed, it is directly inserted into the through hole of the large shaft flange, and the positioning portion 521 at the bottom end of the sleeve 52 limits the installation of the sleeve 52.

[0056] With reference to Figure 3 and Figure 8 , each sleeve 52 is connected with a fixing device 7. The fixing device 7 includes a first clamping plate 71, a second clamping plate 72 and an adjusting assembly 73. The first clamping plate 71 and the second clamping plate 72 are both horizontally arranged, and the first clamping plate 71 and the second clamping plate 72 are respectively arranged above and below the large shaft flange.

[0057] With reference to Figure 3 and Figure 8The first clamping plate 71 is in abutment with the top surface of the large shaft flange. The first clamping plate 71 is provided with a first clamping groove 711. The sleeve 52 protrudes from the top of the large shaft flange, and the sleeve 52 is clamped in the first clamping groove 711. The two sides of the sleeve 52 are provided with first baffles 8, which are vertically arranged and fixedly connected with the first clamping plate 71, and the first baffles 8 are in abutment with the sleeve 52.

[0058] The first clamping plate 71 is in abutment with the top of the large shaft flange, and the sleeve 52 is clamped in the first clamping groove 711, which ensures the fixed position of the sleeve 52 and improves the precision and stability of the tooling.

[0059] Referring to Figure 3 and Figure 8 , the second clamping plate 72 is in abutment with the bottom surface of the positioning portion 521. The second clamping plate 72 is provided with a second clamping groove 721, which is in communication with the inside of the sleeve 52. The cross-sectional area of the second clamping groove 721 is larger than the diameter of the sleeve 52, and the positioning rod 51 can be inserted into the sleeve 52. The two sides of the positioning portion 521 are provided with second baffles 9, which are vertically arranged and fixedly connected with the second clamping plate 72, and the second baffles 9 are in abutment with the positioning portion 521.

[0060] The second clamping plate 72 can hold the sleeve 52, and the design of the second clamping groove 721 does not affect the insertion of the positioning rod 51 into the sleeve 52.

[0061] Referring to Figure 3 and Figure 8 , the adjusting assembly 73 includes a first adjusting plate 731, a second adjusting plate 732, and an adjusting bolt 733. The first adjusting plate 731 and the second adjusting plate 732 are vertically arranged and arranged on the side surface of the large shaft flange. The first adjusting plate 731 is fixedly connected with the first clamping plate 71, and the second adjusting plate 732 is fixedly connected with the second clamping plate 72. The first adjusting plate 731 and the second adjusting plate 732 are arranged in a staggered manner and are in sliding abutment.

[0062] Referring to Figure 3 and Figure 8 , the first adjusting plate 731 is located on the side of the second adjusting plate 732 close to the large shaft. The side wall of the first adjusting plate 731 close to the large shaft is fixedly connected with an adjusting nut. The second adjusting plate 732 is provided with a sliding hole 7321, and the length direction of the sliding hole 7321 is vertically arranged. The adjusting bolt 733 passes through the sliding hole 7321 and the first adjusting plate 731, and is threadedly connected with the first adjusting plate 731 and the adjusting nut. When the adjusting bolt 733 is in abutment with the second adjusting plate 732, the first adjusting plate 731 and the second adjusting plate 732 are fixed.

[0063] The adjusting assembly 73 connects the first clamping plate 71 and the second clamping plate 72, so that the first clamping plate 71 and the second clamping plate 72 are fixed or slid relative to each other, thereby adapting to large shaft flanges of different sizes, improving the application range and flexibility of the tooling.

[0064] With reference to Figure 8 The sliding holes 7321, the adjusting bolts 733 and the adjusting nuts form a fixing group, and two fixing groups are arranged in the horizontal direction and are spaced apart.

[0065] The use principle of the present application is as follows: in use, first, the shaft sleeve is cooled and shrunk, and then is placed on the protective pad 3 of the support frame 12 and is accurately positioned by the limiting part 21 of the limiting plate 2. Then the pull rod 42 is pulled, the pull rod 42 drives the connecting rod 43 and the reinforcing rod 44 to move, the reinforcing rod 44 is overlapped with the top surface of the shaft sleeve, and the reinforcing rod 44 has an auxiliary limiting effect on the shaft sleeve.

[0066] The heating element is arranged on the large shaft to heat and expand the large shaft. The sleeve 52 is installed at a suitable position of the large shaft, and the position of the sleeve 52 is adjusted by using the fixing device 7. The large shaft with the heating element is hoisted, the sleeve 52 corresponds to the positioning rod 51, the large shaft is slowly lowered, and the positioning rod 51 is sequentially inserted into the sleeve 52 according to the height from high to low, so that the large shaft is accurately positioned. After all the positioning rods 51 are inserted into the sleeve 52, the large shaft is lowered until the large shaft abuts against the plurality of bearing blocks 6, and the large shaft is placed in place. The large shaft and the shaft sleeve are waited to complete the interference fit, and the coaxiality error is less than 0.05mm.

[0067] The tooling realizes accurate positioning and stable support of the large shaft and the shaft sleeve through the combined design of the base 1, the support frame 12, the limiting plate 2, the positioning device 5 and the bearing block 6, and solves the problems of large assembly difficulty and low efficiency in the traditional installation process due to large size.

[0068] The embodiments of the specific embodiment are the preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A tool for installing a bushing on a large shaft, the tool comprising: The base (1) comprises a bottom plate (11) and a support frame (12) connected with the bottom plate (11), and the support frame (12) is used for placing a shaft sleeve; A limiting plate (2) is connected with the support frame (12) and used for limiting the shaft sleeve; A positioning device (5) comprises a plurality of positioning rods (51) and a plurality of sleeves (52) mounted on the large shaft, the positioning rods (51) are vertically arranged, the plurality of positioning rods (51) are connected with the bottom plate (11) and distributed around the support frame (12), the positioning rods (51) pass through the sleeves (52), and the inner diameter of the sleeves (52) matches the outer diameter of the positioning rods (51); A plurality of bearing blocks (6) are arranged, the plurality of bearing blocks (6) are connected with the bottom plate (11) and distributed around the support frame (12), and the bearing blocks (6) are used for bearing the large shaft.

2. The tooling for large shaft mounting bushings of claim 1, wherein: The limiting plate (2) is arranged on the inner side of the shaft sleeve, the limiting plate (2) comprises a plurality of limiting portions (21), the limiting portions (21) of the limiting plate (2) match the inner diameter of the shaft sleeve in diameter, and the limiting portions (21) are arranged in an inverted angle.

3. The tooling for large shaft mounting bushings of claim 1, wherein: The bottom plate (11) is connected with a limiting device (4) for limiting the shaft sleeve in the vertical direction, the limiting device (4) comprises a mounting block (41), a pull rod (42), a connecting rod (43), a reinforcing rod (44) and a mounting frame (45), the mounting block (41) is connected with the bottom plate (11), the pull rod (42) passes through the mounting block (41) and the support frame (12), and the pull rod (42) is slidably connected with the mounting block (41); the connecting rod (43) is arranged on the inner side of the shaft sleeve, one end of the connecting rod (43) is fixedly connected with the pull rod (42), the other end of the connecting rod (43) is connected with the reinforcing rod (44), the mounting frame (45) is connected with the support frame (12), the reinforcing rod (44) passes through the mounting frame (45) and is slidably connected with the mounting frame (45), the reinforcing rod (44) extends out of the mounting frame (45), and when the reinforcing rod (44) is overlapped with the top of the shaft sleeve, the limiting of the shaft sleeve can be achieved.

4. The tooling for large shaft mounting bushings of claim 3, wherein: The pull rod (42) is connected with a handle (421).

5. The tooling for large shaft mounting bushings of claim 1, wherein: The lengths of the plurality of positioning rods (51) are different.

6. The tooling for large shaft mounting bushings of claim 1 or 5, wherein: The positioning rod (51) is provided with a guide portion at the top end, and the diameter of the guide portion gradually decreases from the bottom end to the top end.

7. The tooling for large shaft mounting bushings of claim 1, wherein: The sleeve (52) is provided with a positioning part (521) at the bottom end, the outer diameter of which is greater than the diameter of the flange through hole of the large shaft, the sleeve (52) is connected with the large shaft through a fixing device (7), the fixing device (7) comprises a first clamping plate (71), a second clamping plate (72) and an adjusting assembly (73), the first clamping plate (71) abuts against the top of the flange of the large shaft, the first clamping plate (71) is provided with a first clamping groove (711), the sleeve (52) is clamped in the first clamping groove (711), the second clamping plate (72) abuts against the bottom end of the positioning part (521), the second clamping plate (72) is provided with a second clamping groove (721), the positioning rod (51) can pass through the second clamping groove (721) and extend into the sleeve (52), one end of the adjusting assembly (73) is connected with the first clamping plate (71), the other end is connected with the second clamping plate (72), so as to fix the sleeve (52) and the large shaft.

8. The tooling for large shaft mounting bushings of claim 7, wherein: The adjusting assembly (73) comprises a first adjusting plate (731), a second adjusting plate (732) and an adjusting bolt (733), the first adjusting plate (731) is connected with the first clamping plate (71), the second adjusting plate (732) is connected with the second clamping plate (72), the first adjusting plate (731) and the second adjusting plate (732) are arranged in a staggered manner, the first adjusting plate (731) is connected with an adjusting nut, the second adjusting plate (732) is provided with a sliding hole (7321), the adjusting bolt (733) passes through the sliding hole (7321) and is threadedly connected with the first adjusting plate (731) and the adjusting nut, so as to adjust the position of the first adjusting plate (731) and the second adjusting plate (732), when the adjusting bolt (733) abuts against the second adjusting plate (732), the first adjusting plate (731) and the second adjusting plate (732) are fixed.

9. The tooling for large shaft mounting bushings of claim 1, wherein: The support frame (12) and the shaft sleeve are provided with a protection pad (3), the protection pad (3) is connected with the support frame (12) and abuts against the shaft sleeve.

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