Mounting device for assembling rotor and commutator

Abstract

The utility model provides an installation device used for assembling a rotor and a commutator, the installation device comprises a positioning cylinder, a sliding sleeve and a positioning pin, the positioning cylinder is internally provided with an installation cavity used for installing the commutator, the sliding sleeve is at least partially located in the first end of the positioning cylinder and is in sliding connection with the positioning cylinder, and the positioning pin is located in the installation cavity. The sliding sleeve can move in the axial direction of the positioning cylinder relative to the positioning cylinder, a positioning space used for installing a rotor is formed in the sliding sleeve, and the positioning space penetrates through the two ends of the sliding sleeve; the positioning pin is movably connected with the sliding sleeve, the positioning pin can move in the radial direction of the sliding sleeve relative to the sliding sleeve, and the positioning pin is used for being inserted into a gap between two adjacent magnetic shoes of the rotor, so that the sliding sleeve and the rotor are relatively static. According to the mounting device provided by the invention, the assembling efficiency of the rotor and the commutator can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motor assembly, and in particular to an installation device for assembling a rotor and a commutator. Background Art

[0002] As a core component of power equipment, motors are widely used in household appliances, industrial production, the automotive industry, robots, aerospace, medical equipment, and consumer electronics. During the production and assembly of motors, the commutator, as an important component of the motor, needs to be pressed into the rotor shaft of the rotor in the motor.

[0003] In the related art, the commutator and the rotor are generally assembled by means of an installation device. The installation device includes a hollow positioning cylinder and a positioning plate. The outer wall of the positioning cylinder has an axially extending sliding groove, and the positioning plate is located in the sliding groove. During installation, the commutator is first fixed in the positioning cylinder by fasteners such as screws and located at the bottom of the positioning cylinder. Then the rotor is placed in the positioning cylinder and suspended directly above the commutator. The positioning plate is then inserted into the sliding groove, and part of it is inserted into the gap between two adjacent magnetic tiles of the rotor to limit the rotation of the rotor relative to the positioning cylinder along the circumference of the positioning cylinder. Finally, the rotor is pressed down by a press-fitting device so that the commutator can be sleeved outside the rotor shaft. After the press-fitting is completed, the positioning plate is first removed from the sliding groove and the gap, and then the rotor and the commutator are moved up by the press-fitting device and then removed from the positioning cylinder together.

[0004] However, in order to facilitate the insertion and removal of the positioning piece during the assembly, most of the structure of the positioning piece will protrude outside the positioning tube. When most of the structure of the positioning piece protrudes outside the positioning tube, the positioning piece will become unbalanced and out of the gap when following the movement of the rotor due to its own gravity, so it is necessary to manually hold the positioning piece. This will make the operation cumbersome and the assembly efficiency is low. Utility Model Content

[0005] The embodiment of the present disclosure provides an installation device for assembling a rotor and a commutator, which can improve the assembly efficiency of the rotor and the commutator. The technical solution is as follows:

[0006] An embodiment of the present disclosure provides an installation device for assembling a rotor and a commutator, the installation device comprising a positioning cylinder, a sleeve and a positioning pin, the interior of the positioning cylinder having an installation cavity for installing the commutator, the sleeve being at least partially located in the first end of the positioning cylinder and being slidably connected to the positioning cylinder, the sleeve being able to move axially relative to the positioning cylinder along the positioning cylinder, the interior of the sleeve having a positioning space for installing the rotor, the positioning space passing through both ends of the sleeve; the positioning pin being movably connected to the sleeve and being able to move radially relative to the sleeve along the sleeve, the positioning pin being used to be inserted into a gap between two adjacent magnetic tiles of the rotor so that the sleeve and the rotor are relatively stationary in the circumferential direction of the sleeve.

[0007] In another implementation of the present disclosure, the outer wall of the positioning pin has a thread, the side wall of the sliding sleeve has a threaded hole, and the positioning pin is threadedly matched with the threaded hole.

[0008] In another implementation of the present disclosure, the end of the first end of the locating pin has a circular limit platform, the outer diameter of the limit platform is larger than the inner diameter of the threaded hole, and the first end of the locating pin is located outside the sliding sleeve.

[0009] In yet another implementation of the present disclosure, a side wall of the positioning cylinder has a notch, the notch is partially located at the first end of the positioning cylinder, and the positioning pin is located in the notch.

[0010] In another implementation of the present disclosure, the outer wall of the sliding sleeve has a ridge, and the ridge extends along the axial direction of the sliding sleeve; the side wall of the positioning cylinder has a limiting groove, and the limiting groove extends along the extension direction of the ridge, and the limiting groove extends from the first end of the positioning cylinder to the middle part of the positioning cylinder, and the ridge is located in the limiting groove.

[0011] In another implementation of the present disclosure, there are a plurality of the limiting grooves, and the plurality of the limiting grooves are arranged in pairs, and the two limiting grooves arranged in pairs are respectively located on both sides of the notch.

[0012] In another implementation of the present disclosure, the positioning cylinder includes a cylinder body, a base and a plurality of elastic telescopic parts, wherein the base is at least partially located inside the cylinder body, and is respectively connected to two ends of the cylinder body with the sliding sleeve; the plurality of elastic telescopic parts are distributed inside the cylinder body at circumferential intervals with the axis of the cylinder body as the axis, and are located outside the mounting cavity; one end of each of the plurality of elastic telescopic parts is connected to the base, and the other end of each elastic telescopic part is connected to the sliding sleeve, and the telescopic direction of the elastic telescopic parts is the axial direction of the sliding sleeve.

[0013] In another implementation of the present disclosure, the positioning cylinder also includes a plurality of guide columns, and the plurality of guide columns correspond one-to-one to the plurality of elastic telescopic parts. The guide columns are located inside the corresponding elastic telescopic parts, one end of the guide columns is connected to the base, and the other end of the guide columns is slidably located in the sliding sleeve.

[0014] In another implementation of the present disclosure, the side wall of the positioning cylinder has a slot, which extends from one end of the cylinder body connected to the base to the middle of the cylinder body, and the extension direction of the slot is the same as the axial direction of the cylinder body; the base includes a circular cover plate and a mounting block, the cover plate is located at the second end of the cylinder body and is connected to the cylinder body, and the mounting block is located on the side of the cover plate facing the sliding sleeve and is connected to the cover plate; the mounting cavity is formed inside the mounting block, and the outer wall of the mounting block has a protrusion, which is located in the slot.

[0015] In another implementation of the present disclosure, there are multiple card slots, and the card slots are arranged one-to-one with the limit slots. In the axial direction along the cylinder, the projections of the card slots and the corresponding limit slots on the end surface of the second end of the cylinder overlap.

[0016] The technical solution provided by the embodiments of the present disclosure brings the following beneficial effects:

[0017] Since the installation device comprises a positioning cylinder and a sliding sleeve, the sliding sleeve has a positioning space for installing the rotor inside, and the positioning space is communicated with the installation cavity. In this way, the commutator can be installed in the installation cavity, and the rotor can be installed in the positioning space at the same time.

[0018] Furthermore, because the sleeve is slidably connected to the positioning cylinder and the positioning space is connected to the installation cavity, after the commutator and the rotor are installed, the sleeve can be pressed down by the pressing equipment to move the sleeve and the rotor toward the positioning cylinder until the rotor shaft is inserted into the commutator and then pressed together with the commutator to realize the assembly of the two.

[0019] Furthermore, since the installation device further includes a positioning pin, and the positioning pin is movably connected to the sleeve, after the rotor is installed in the sleeve, the positioning pin can be controlled so that the positioning pin is partially inserted into the gap between two adjacent magnetic tiles of the rotor, so that the sleeve and the rotor are fixed together without relative rotation, so that when the sleeve is pressed, the rotor and the sleeve will move together, ensuring that there will be no misalignment between the rotor and the commutator, thereby improving the assembly quality between the rotor and the commutator. At the same time, after the rotor and the commutator are assembled, the positioning pin can be removed from the rotor to limit the next rotor, which is convenient, fast, time-saving and labor-saving.

[0020] That is to say, when the rotor is limited by the positioning pin, it is only necessary to move the positioning pin, and there is no need to manually support the positioning pin all the time. The positioning pin will not fall off from the gap, which is easy and convenient, and greatly improves the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A schematic diagram of the structure of the installation device provided in the embodiment of the present disclosure;

[0023] Figure 2 for Figure 1 Section view along AA direction;

[0024] Figure 3 for Figure 2 Top view of the middle sleeve;

[0025] Figure 4 for Figure 2 A top view of the middle positioning cylinder;

[0026] Figure 5 for Figure 4 The cross-section along the BB direction;

[0027] Figure 6 for Figure 1 Exploded diagram of

[0028] Figure 7 for Figure 2 The structural diagram of the installation block;

[0029] Figure 8 for Figure 7 A top view of

[0030] Fig. 9 A diagram showing the use status of the installation device provided in an embodiment of the present disclosure.

[0031] The symbols in the figure mean the following:

[0032] 1. Positioning cylinder; 10. Mounting cavity; 101. Notch; 102. Limiting groove; 103. Card slot; 11. Cylinder; 12. Elastic telescopic member; 13. Base; 131. Cover plate; 132. Mounting block; 134. Backing plate; 1321. Protrusion; 1322. Bottom plate; 1323. Mounting sleeve; 1324. Limiting block; 14. Guide column;

[0033] 2. Sliding sleeve; 20. Positioning space; 201. Threaded hole; 202. Raised edge;

[0034] 3. locating pin; 31. limit table; 32. cone tip; 501. commutator; 502. rotor; 503. rotor shaft. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0036] The present disclosure provides an installation device for assembling a rotor and a commutator, such as Figure 1 As shown, the installation device includes a positioning cylinder 1, a sleeve 2 and a positioning pin 3. The interior of the positioning cylinder 1 has an installation cavity 10 for installing the commutator. The sleeve 2 is at least partially located in the first end of the positioning cylinder 1 and is slidingly connected to the positioning cylinder 1. The sleeve 2 can move axially relative to the positioning cylinder 1 along the positioning cylinder 1. The interior of the sleeve 2 has a positioning space 20 for installing the rotor, and the positioning space 20 runs through both ends of the sleeve 2.

[0037] The locating pin 3 is movably connected to the sleeve 2 and can move relative to the sleeve 2 along the radial direction of the sleeve 2. The locating pin 3 is used to be inserted into the gap between two adjacent magnetic tiles of the rotor so that the sleeve 2 and the rotor are relatively stationary in the circumferential direction of the sleeve 2.

[0038] Since the installation device includes a positioning cylinder 1 and a sliding sleeve 2, the sliding sleeve 2 has a positioning space 20 for installing the rotor, and the positioning space 20 is connected to the installation cavity 10. In this way, the commutator can be installed in the installation cavity 10, and the rotor can be installed in the positioning space 20 at the same time.

[0039] Furthermore, because the sleeve 2 is slidably connected to the positioning cylinder 1, and the positioning space 20 is communicated with the installation cavity 10, after the commutator and the rotor are installed, the sleeve 2 can be pressed down by the pressing equipment to move it, so that the sleeve 2 moves toward the positioning cylinder 1 with the rotor, until the rotor shaft is inserted into the commutator, and then it can be pressed together with the commutator to realize the assembly of the two.

[0040] Furthermore, since the installation device further includes a positioning pin 3, and the positioning pin 3 is movably connected to the sleeve 2, after the rotor is installed in the sleeve 2, the positioning pin 3 can be controlled so that the positioning pin 3 is partially inserted into the gap between two adjacent magnetic tiles of the rotor, so that the sleeve 2 and the rotor are fixed together without relative rotation, so that when the sleeve 2 is pressed, the rotor and the sleeve will move together, ensuring that there is no misalignment between the rotor shaft and the commutator, and improving the assembly quality between the rotor and the commutator. At the same time, after the rotor and the commutator are assembled, the positioning pin 3 can be removed from the rotor to limit the next rotor, which is convenient, fast, time-saving and labor-saving.

[0041] That is to say, when the rotor is limited by the positioning pin 3, it is only necessary to move the positioning pin 3, which is easy and convenient, and greatly improves the assembly efficiency.

[0042] Figure 2 for Figure 1 The cross-section along the AA direction, combined with Figure 2 Optionally, the outer wall of the positioning pin 3 has a thread, the side wall of the sliding sleeve 2 has a threaded hole 201, and the positioning pin 3 is threadedly matched with the threaded hole 201.

[0043] By setting a thread on the outer wall of the locating pin 3 and setting a threaded hole on the side wall of the sleeve 2, the locating pin 3 can be matched with the threaded hole 201. By easily rotating the locating pin 3, the locating pin 3 can be controlled to move radially along the sleeve 2. At the same time, the locating pin 3 will not easily fall off the sleeve 2, further improving the positioning effect of the locating pin 3.

[0044] In other examples, the positioning pin 3 may also be a bare rod structure, but in this case, there is no connection between the positioning pin 3 and the sliding sleeve 2, which may cause the positioning pin 3 to fall off the sliding sleeve 2. During operation, it is necessary to pay attention to the position of the positioning pin 3 in real time, which will affect the assembly efficiency.

[0045] Optionally, the end of the first end of the positioning pin 3 has a circular limiting platform 31 , the outer diameter of the limiting platform 31 is larger than the inner diameter of the threaded hole 201 , and the first end of the positioning pin 3 is located outside the sliding sleeve 2 .

[0046] The positioning pin 3 can be limited outside the sliding sleeve 2 by the limiting platform 31 to prevent the positioning pin 3 from being completely inserted into the sliding sleeve 2 and being difficult to move out of the sliding sleeve 2 .

[0047] In other examples, a limiting structure or the like may also be provided on the outer wall of the middle portion of the positioning pin 3 , but this may make the positioning pin 3 too long and may interfere with other structures.

[0048] In this embodiment, one end of the positioning pin 3 facing the rotor is a cone tip 32 , so that the end of the cone tip 32 can be quickly inserted into the gap between two adjacent magnetic tiles of the rotor.

[0049] Figure 3 for Figure 2 Top view of the middle sleeve, combined with Figure 3 Optionally, the outer wall of the sliding sleeve 2 has a ridge 202 , and the ridge 202 extends along the axial direction of the sliding sleeve 2 .

[0050] Figure 4 for Figure 2 Top view of the center positioning tube. Figure 5 for Figure 4 The cross-section along the BB direction, combined with Figure 4 and Figure 5 The side wall of the positioning tube 1 has a limiting groove 102 , which extends along the extension direction of the convex rib 202 , and the limiting groove 102 extends from the first end of the positioning tube 1 to the middle of the positioning tube 1 , and the convex rib 202 is located in the limiting groove 102 .

[0051] In the above implementation, since the ridge 202 is located in the limiting groove 102 , the sliding sleeve 2 can only move along the length direction of the ridge 202 when moving, and will not swing, thereby limiting the moving direction of the sliding sleeve 2 .

[0052] In other examples, the above structure can also be reversed, and convex ridges are provided inside the positioning cylinder 1, and limiting grooves are provided on the side walls of the sliding sleeve 2. The movement direction of the sliding sleeve 2 is limited by the cooperation between the convex ridges and the limiting grooves. It is relatively difficult to process only the convex ridges inside the positioning cylinder 1, which will increase the processing cost.

[0053] Continue to see Figure 4 and Figure 5 Optionally, the side wall of the positioning cylinder 1 has a notch 101 , the notch 101 passes through one end of the positioning cylinder 1 facing the sliding sleeve 2 , and the positioning pin 3 is located in the notch 101 .

[0054] The notch 101 can provide an installation space for the positioning pin 3, so that after the positioning pin 3 is inserted into the sliding sleeve 2, when the positioning pin 3 moves with the sliding sleeve 2, the positioning pin 3 will not be affected by the presence of the positioning cylinder 1. In other words, the notch 101 can allow the positioning pin 3 to move with the sliding sleeve 2 at will.

[0055] In other examples, the notch 101 can also be replaced by a groove, a hole, etc., but the notch 101 has a larger hollow area than the groove, the hole, etc. This not only provides space for the movement of the positioning pin 3, but also reduces the weight of the positioning tube 1, so that the entire installation device can be designed lightweight.

[0056] Optionally, there are multiple limiting grooves 102 , and the multiple limiting grooves 102 are arranged in pairs, and the two limiting grooves 102 arranged in pairs are respectively located on both sides of the notch 101 .

[0057] This not only further reduces the weight of the entire installation device, but also facilitates the assembly of the sliding sleeve 2 in the positioning cylinder 1 .

[0058] In this embodiment, there are two limiting grooves 102 .

[0059] Figure 6 for Figure 1 Exploded diagram, combined with Figure 6Optionally, the positioning cylinder 1 includes a cylinder body 11, a base 13 and a plurality of elastic telescopic members 12. The base 13 is at least partially located inside the cylinder body 11, and is connected to both ends of the cylinder body 11 with the sliding sleeve 2, respectively.

[0060] A plurality of elastic telescopic members 12 are circumferentially spaced and distributed inside the cylinder 11 with the axis of the cylinder 11 as the axis, and are located outside the mounting cavity 10. One end of each of the plurality of elastic telescopic members 12 is connected to the base 13, and the other end of the elastic telescopic member 12 is connected to the sliding sleeve 2, and the telescopic direction of each elastic telescopic member 12 is the axial direction of the sliding sleeve 2. The base 13 is at least partially located inside the cylinder 11, and is connected to the second end of the cylinder 11.

[0061] The positioning cylinder 1 is set to the above structure, so that the cylinder body 11 and the sliding sleeve 2 can be slidably connected through the elastic telescopic member 12. In addition, after the rotor and the commutator are assembled, the elastic force of the elastic telescopic member 12 can be used to promote the sliding sleeve 2 to return to its original position, so as to prepare for the next press-fitting operation. At the same time, the base 13 provides a mounting base for the commutator.

[0062] In this embodiment, the elastic telescopic member 12 is a telescopic spring.

[0063] In other examples, the elastic telescopic member 12 may also be replaced by other structures, such as an electric telescopic rod, etc. However, compared with the elastic telescopic member 12, the electric telescopic rod needs to be controlled to be telescopic, and the telescopic stroke of the electric telescopic rod needs to be consistent with the moving stroke of the sliding sleeve 2, which not only increases the difficulty of operation, but also increases the cost of the device.

[0064] Optionally, the positioning cylinder 1 also includes a plurality of guide columns 14, and the plurality of guide columns 14 correspond one-to-one to the plurality of elastic telescopic parts 12. The guide columns 14 are located inside the corresponding elastic telescopic parts 12, and one end of the guide columns 14 is connected to the base 13, and the other end is slidably located in the sliding sleeve 2. The length direction of the guide columns 14 is the telescopic direction of the elastic telescopic parts 12.

[0065] In the above implementation, the guide column 14 can guide the movement of the sliding sleeve 2, so that when the sliding sleeve 2 compresses the elastic telescopic member 12, the movement of the sliding sleeve 2 can be limited without swinging.

[0066] In other examples, the guide column 14 may also be replaced by other structures, such as the telescopic rod mentioned above.

[0067] Optionally, the side wall of the positioning cylinder 1 has a slot 103 , which extends from one end of the cylinder body 11 connected to the base 13 toward the middle of the cylinder body, and the extending direction of the slot 103 is the same as the axial direction of the cylinder body 11 .

[0068] The base 13 includes a circular cover plate 131 and a mounting block 132. The cover plate 131 is located at the second end of the cylinder 11 and connected to the cylinder 11. The mounting block 132 is located on the side of the cover plate 131 facing the sleeve 2 and connected to the cover plate 131. The mounting block 132 forms a mounting cavity 10 inside, and the outer wall of the mounting block 132 has a protrusion 1321, which is located in the slot 103.

[0069] The slot 103 is used to cooperate with the protrusion 1321, so that the mounting block 132 can be positioned and installed together with the bottom of the cylinder 11. At the same time, the mounting block 132 is used to install the commutator. The cover plate 131 is used to be fixed together with the bottom of the cylinder 11.

[0070] Optionally, there are multiple slots 103 , and the slots 103 are arranged one-to-one with the limiting slots 102 , and along the axial direction of the cylinder 11 , the projections of the slots 103 and the corresponding limiting slots 102 on the end surface of the second end of the cylinder 11 overlap.

[0071] In this way, the angle between the rotor and the commutator can be fixed by the clamping groove 103 and the limiting groove 102 when the rotor and the commutator are installed separately, thereby improving the assembly efficiency.

[0072] Optionally, the base 13 further includes a pad 134 , which is located on a side of the cover 131 away from the mounting block 132 , and is used to be connected to the guide column 14 .

[0073] The pad 134 is used to cushion the bottom of the positioning tube 1 and is also used to fix the guide column 14 .

[0074] In this embodiment, the mounting block 132 includes a circular bottom plate 1322 and a cylindrical mounting sleeve 1323. The mounting sleeve 1323 is located on the side of the bottom plate 1322 facing the sliding sleeve 2, and is an integral casting structure with the bottom plate 1322. The interior of the mounting sleeve 1323 forms a mounting cavity 10. The protrusion 1321 is located on the outer periphery of the bottom plate, and is an integral casting structure with the bottom plate 1322.

[0075] Figure 7 for Figure 2 The structural diagram of the installation block is shown in Figure 1. Figure 8 for Figure 7 For a top view of Figure 7 and Figure 8 In this embodiment, the bottom plate 1322 has a plurality of screw holes around the outer circumference of the mounting sleeve 1323, and bolts are inserted into the screw holes, so that the bottom plate 1322 can be connected to the cover plate 131 by bolts. At the same time, the cover plate 131 is also connected to the cylinder 11 by a plurality of bolts.

[0076] In addition, in order to limit the angle of the commutator when it is installed in the installation cavity 10, a pair of limit blocks 1324 are connected to one end of the installation sleeve 1323 facing the sliding sleeve 2, and the pair of limit blocks 1324 are spaced apart from each other. At least part of the commutator structure is clamped in the space between the pair of limit blocks 1324 to ensure that the commutator does not rotate.

[0077] Combine the following Fig. 9 The working process of the installation device provided by the embodiment of the present disclosure is briefly introduced:

[0078] Fig. 9 For a diagram of the use status of the installation device provided in the embodiment of the present disclosure, see Fig. 9 First, the rotor 502 is limited in the positioning space 20 of the sleeve 2, and the rotor shaft 503 is extended out of the positioning space 20. The commutator is positioned in the installation cavity 10.

[0079] Then, the sleeve 2 is pressed downward, so that the sleeve 2 moves downward with the rotor 502 , and the rotor shaft 503 moves toward the commutator 501 , so that the commutator 501 is sleeved on the rotor shaft 503 , and the commutator 501 and the rotor 502 are press-fitted.

[0080] Afterwards, the downward pressure is removed, and the commutator 501 , the rotor 502 and the sliding sleeve 2 are reset under the action of the elastic telescopic member 12 .

[0081] The above are only optional embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A mounting device for assembling a rotor and a commutator, characterized in that: The mounting device comprises a positioning cylinder (1), a sliding sleeve (2) and a positioning pin (3); the positioning cylinder (1) has a mounting cavity (10) inside for mounting the commutator. The sliding sleeve (2) is at least partially located in the first end of the positioning cylinder (1) and is slidably connected to the positioning cylinder (1); the sliding sleeve (2) can move relative to the positioning cylinder (1) along the axial direction of the positioning cylinder (1); the sliding sleeve (2) has a positioning space (20) for installing the rotor inside, and the positioning space (20) passes through both ends of the sliding sleeve (2); The positioning pin (3) is movably connected to the sleeve (2), and the positioning pin (3) can move relative to the sleeve (2) along the radial direction of the sleeve (2). The positioning pin (3) is used to be inserted into the gap between two adjacent magnetic tiles of the rotor so that the sleeve (2) and the rotor are relatively stationary in the circumferential direction of the sleeve (2).

2. The mounting device according to claim 1, characterized in that: The outer wall of the positioning pin (3) has a thread, the side wall of the sliding sleeve (2) has a threaded hole (201), and the positioning pin (3) is threadably matched with the threaded hole (201).

3. The mounting device according to claim 2, characterized in that: The end of the first end of the positioning pin (3) has a circular limiting platform (31), the outer diameter of the limiting platform (31) is greater than the inner diameter of the threaded hole (201), and the first end of the positioning pin (3) is located outside the sliding sleeve (2).

4. The mounting device according to any one of claims 1 to 3, characterized in that: The side wall of the positioning cylinder (1) has a notch (101), the notch (101) is partially located at the first end of the positioning cylinder (1), and the positioning pin (3) is located in the notch (101).

5. The mounting device according to claim 4, characterized in that: The outer wall of the sliding sleeve (2) has a convex ridge (202), and the convex ridge (202) extends along the axial direction of the sliding sleeve (2); The side wall of the positioning cylinder (1) has a limiting groove (102), the limiting groove (102) extends along the extension direction of the convex ridge (202), and the limiting groove (102) extends from the first end of the positioning cylinder (1) to the middle part of the positioning cylinder (1), and the convex ridge (202) is located in the limiting groove (102).

6. The mounting device according to claim 5, characterized in that: There are a plurality of the limiting grooves (102), and the plurality of limiting grooves (102) are arranged in pairs, and the two limiting grooves (102) arranged in pairs are respectively located on both sides of the notch (101).

7. The mounting device according to claim 5, characterized in that: The positioning cylinder (1) comprises a cylinder body (11), a base (13) and a plurality of elastic telescopic parts (12). The base (13) is at least partially located inside the cylinder (11), and is connected to both ends of the cylinder (11) together with the sliding sleeve (2); The plurality of elastic telescopic members (12) are distributed inside the cylinder (11) at intervals in the circumferential direction with the axis of the cylinder (11) as the axis, and are located outside the installation cavity (10); One end of each of the plurality of elastic telescopic parts (12) is connected to the base (13), and the other end is connected to the sliding sleeve (2); the telescopic direction of each elastic telescopic part (12) is the axial direction of the sliding sleeve (2).

8. The mounting device according to claim 7, characterized in that: The positioning cylinder (1) further comprises a plurality of guide columns (14), the plurality of guide columns (14) corresponding one by one to the plurality of elastic telescopic parts (12), the guide columns (14) being located inside the corresponding elastic telescopic parts (12), one end of the guide columns (14) being connected to the base (13), and the other end of the guide columns (14) being slidably located in the sliding sleeve (2).

9. The mounting device according to claim 7, characterized in that: The side wall of the positioning cylinder (1) has a slot (103), the slot (103) extending from one end of the cylinder (11) connected to the base (13) to the middle of the cylinder (11), and the extending direction of the slot (103) is the same as the axial direction of the cylinder (11); The base (13) comprises a circular cover plate (131) and a mounting block (132), wherein the cover plate (131) is located at the second end of the cylinder (11) and is connected to the cylinder (11), and the mounting block (132) is located on a side of the cover plate (131) facing the sliding sleeve (2) and is connected to the cover plate (131); The interior of the mounting block (132) forms the mounting cavity (10), and the outer wall of the mounting block (132) has a protrusion (1321), and the protrusion (1321) is located in the clamping groove (103).

10. The mounting device according to claim 9, characterized in that: There are a plurality of the card slots (103), and the card slots (103) are arranged in one-to-one correspondence with the limiting slots (102); along the axial direction of the cylinder (11), the projections of the card slots (103) and the corresponding limiting slots (102) on the end surface of the second end of the cylinder (11) overlap.

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