A press fitting die for a fan rotor shaft and a rotor housing

Abstract

The utility model discloses a kind of press-fitting mould of fan rotor shaft and rotor shell, including rack and the upper die plate, driving part, rotor placement mold core, return plate, shell press-fitting upper die and hydraulic press of being installed on rack, shell press-fitting upper die is equipped with the limit slot of opening downwards, limit slot can be inserted on the upper portion of rotor shell;Rotor placement mold core is installed at the top of upper die plate and located below shell press-fitting upper die;Rotor placement mold core center is equipped with the fixed hole that can be inserted vertically with the lower end of rotor shaft, hydraulic press is used to press down shell press-fitting upper die;Return plate is annular, return plate is located between rotor placement mold core and shell press-fitting upper die, return plate is equipped with first center hole, the upper end of return plate and the bottom surface of shell press-fitting upper die and the bottom surface of rotor shell abut, driving part is installed in the lower part of rack and is used to upwardly jacking return plate.In the press-fitting process of rotor shell and rotor shaft, it can guarantee that the matching concentricity of rotor shaft and rotor shell in motor component.

Description

Technical Field

[0001] This utility model belongs to the field of press-fitting mold technology, specifically relating to a press-fitting mold for a fan rotor shaft and rotor housing. Background Technology

[0002] Currently, the EC external rotor circular duct fan is a type of air supply and exhaust equipment suitable for public places such as hotels, guesthouses, high-end venues, supermarkets, restrooms, and storage rooms. Among its key components, the concentricity of the rotor shaft and rotor housing is particularly important. The quality of the rotor shaft press-fit determines the operational stability of the product. Traditional rotor shaft press-fit molds on the market typically have the following defects:

[0003] 1. In the traditional press-fitting process, the gap between the outer shell and the press-fitting mold core is relatively large, and the tolerance of the rotor shaft hole is too large, resulting in a large gap. It is difficult to ensure the concentricity of the rotor shaft and the outer shell after press-fitting.

[0004] 2. Without an upper pressing mold for auxiliary pressing, and without ensuring the downward verticality of the entire rotor housing during pressing, it is difficult to ensure the concentricity of the rotor shaft with the housing after pressing.

[0005] Therefore, a new technology is needed to solve the problem of the difficulty in ensuring the concentricity of the rotor shaft and rotor housing in the motor components in the existing technology. Utility Model Content

[0006] To address the aforementioned problems in the prior art, this utility model provides a press-fit mold for a fan rotor shaft and rotor housing, which ensures the concentricity of the rotor shaft and rotor housing in the motor components during the press-fitting process.

[0007] The present invention adopts the following technical solution:

[0008] A press-fit mold for a fan rotor shaft and rotor housing includes a frame and an upper template, a drive component, a rotor placement mold core, a return plate, a housing press-fit upper mold, and a hydraulic press mounted on the frame. The housing press-fit upper mold has a downward-facing limiting groove for inserting the upper part of the rotor housing. The rotor placement mold core is mounted on the top of the upper template and located below the housing press-fit upper mold. The rotor placement mold core has a fixing hole at its center for vertical insertion of the lower end of the rotor shaft. The hydraulic press is used to press down the housing press-fit upper mold.

[0009] The return plate is annular and located between the rotor placement mold core and the outer shell pressing mold. The return plate has a first central hole. The upper end of the return plate abuts against the bottom surface of the outer shell pressing mold and the bottom surface of the rotor outer shell. The driving component is installed on the lower part of the frame and is used to lift the return plate upward.

[0010] As a further improvement to the technical solution of this utility model, the frame is also provided with a lower template and several connecting columns. The lower template is located below the upper template, the driving component is installed on the lower template, and the two ends of each connecting column are detachably fixedly connected to the lower template and the upper template, respectively.

[0011] As a further improvement to the technical solution of this utility model, it also includes a number of push rods that are parallel and spaced apart in the vertical direction. The upper end of each push rod is detachably fixedly connected to the return plate, and the lower end passes through the upper template and is connected to the driving component. The driving component can drive the number of push rods to rise and fall synchronously.

[0012] As a further improvement to the technical solution of this utility model, it also includes a push plate, the lower end of each push rod is detachably fixedly connected to the push plate, the push plate is located below the upper template, the push plate is installed on the upper end of the driving member, and the driving member can drive the push plate to rise and fall.

[0013] As a further improvement to the technical solution of this utility model, two guide pillars are fixed at intervals on the lower template, and a reset spring is sleeved on the outside of each of the two guide pillars. The push plate is provided with a through hole through which each of the guide pillars can pass. The cross-sectional size of the reset spring is larger than the size of the through hole, and each of the reset springs can be connected to the lower end of the push plate.

[0014] As a further improvement to the technical solution of this utility model, the upper template is also provided with through holes corresponding to each of the push rods. A linear bearing is installed in each of the through holes, and a shaft hole is provided in each of the linear bearings, through which the push rod can pass.

[0015] As a further improvement to the technical solution of this utility model, the rotor placement mold core includes a core mold and a base that are fixedly connected from top to bottom. The cross-sectional dimension of the base is larger than that of the core mold. The fixing hole is located on the core mold, the core mold can be inserted into the limiting groove, and the rotor shell can be fitted over the core mold. The base is detachably fixedly connected to the upper template.

[0016] As a further improvement to the technical solution of this utility model, at least two positioning posts are provided at intervals on the upper end of the upper template, and the base is provided with positioning holes that can be matched with each of the positioning posts.

[0017] As a further improvement to the technical solution of this utility model, the first central hole is a stepped hole. The first central hole includes a first hole segment and a second hole segment arranged sequentially from top to bottom and interconnected with each other. A stepped surface is provided between the first hole segment and the second hole segment. The lower end of the rotor shell can abut against the stepped surface. The lower end of the rotor shell can be inserted into the first hole segment. The diameter of the second hole segment is adapted to the diameter of the mold core. The bottom end of the upper mold pressed into the shell can abut against the upper surface of the return plate.

[0018] As a further improvement to the technical solution of this utility model, the driving component is a cylinder, and a pneumatic manual valve for controlling the start and stop of the cylinder is also installed on the lower template; the driving component is provided with a driving shaft, and a top plate is installed on the upper end of the driving shaft. The top plate is horizontally arranged and parallel to the push plate. The driving shaft can drive the top plate to rise and fall, and the upper surface of the top plate can abut against the push plate.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] The press-fit mold for the fan rotor shaft and rotor housing in this solution can ensure the concentricity of the rotor shaft and rotor housing in the motor components during the press-fitting process of the rotor housing and rotor shaft. Attached Figure Description

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0022] Figure 1 This is a cross-sectional view of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 3 The installation structure diagram on the lower template;

[0025] Figure 4 This is a schematic diagram of the mounting structure on the push plate;

[0026] Figure 5 This is a schematic diagram of the upper template structure;

[0027] Figure 6 This is a schematic diagram of the rotor placement mold core structure;

[0028] Figure 7 This is a schematic diagram of the return plate structure;

[0029] Figure 8 This is a schematic diagram of the structure of the outer shell press-fitting mold.

[0030] Figure label:

[0031] 1-Lower template; 11-Connecting column; 12-Guide column; 13-Reset spring; 14-Drive component; 141-Drive shaft; 142-Top plate; 143-Cylinder guide column; 15-Pneumatic manual valve; 16-First mounting hole; 17-Second mounting hole; 18-Third mounting hole;

[0032] 2-Push plate; 21-Through hole; 22-Push rod; 23-Fourth mounting hole; 24-Fifth mounting hole; 25-Second center hole;

[0033] 3-Upper template; 31-Through hole; 32-Linear bearing; 321-Shaft hole; 33-Positioning pin; 34-Vent hole; 35-Sixth mounting hole; 36-Seventh mounting hole;

[0034] 4- Upper mold for pressing the outer shell; 41- Limiting groove;

[0035] 5-Return plate; 51-First center hole; 52-Stepped surface; 53-Second connecting hole;

[0036] 6-Rotor placement mold core; 62-Core mold; 621-Fixing hole; 63-Base; 631-Positioning hole; 632-Matching hole; 633-First connecting hole;

[0037] 7-Rotor housing;

[0038] 8-Rotor shaft. Detailed Implementation

[0039] The following will provide a clear and complete description of the concept, specific structure, and technical effects of this utility model in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, solution, and effects of this utility model. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0040] It should be noted that, unless otherwise specified, when a feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or it can be indirectly fixed or connected to the other feature. Furthermore, the descriptions of "upper," "lower," "left," and "right" used in this utility model are only relative to the relative positional relationships of the various components of this utility model in the accompanying drawings.

[0041] Reference Figures 1 to 8A press-fit mold for a fan rotor shaft and rotor housing, suitable for press-fitting the rotor shaft 8 and rotor housing 7 of an EC external rotor circular duct fan, includes a frame and an upper template 3, a drive component 14, a rotor placement mold core 6, a return plate 5, a housing press-fit upper mold 4, and a hydraulic press mounted on the frame. The housing press-fit upper mold 4 has a downward-facing limiting groove 41, which allows the upper part of the rotor housing 7 to be inserted. The rotor placement mold core 6 is mounted on the top of the upper template 3 and located below the housing press-fit upper mold 4. The rotor placement mold core 6 has a fixing hole 621 in the center, which allows the lower end of the rotor shaft 8 to be vertically inserted. The hydraulic press is used to press down the housing press-fit upper mold 4.

[0042] The return plate 5 is annular and is located between the rotor placement mold core 6 and the outer shell pressing mold 4. The return plate 5 is provided with a first central hole 51. The upper end of the return plate 5 abuts against the bottom surface of the outer shell pressing mold 4 and the bottom surface of the rotor outer shell 7. The driving component 14 is installed on the lower part of the frame and is used to lift the return plate 5 upward.

[0043] Based on the structural characteristics of the EC external rotor assembly, the rotor shaft 8 is precisely pressed into the center of the rotor housing 7 by jogging downwards with a hydraulic press. Then, the rotor housing 7 is pushed upwards by a cylinder for unloading, achieving a high-precision fit between the rotor housing 7 and the rotor shaft 8. This utility model not only achieves press-fitting of product components, but also offers advantages such as simple assembly, high concentricity, convenient installation and operation, and high operational stability.

[0044] Specifically, the frame is also provided with a lower template 1 and several connecting columns 11. The lower template 1 is located below the upper template 3. The driving component 14 is installed on the lower template 1. The two ends of each connecting column 11 are detachably fixedly connected to the lower template 1 and the upper template 3, respectively.

[0045] Specifically, the press-fit mold for the fan rotor shaft 8 and rotor housing 7 in this solution also includes several push rods 22 that are parallel and spaced apart in the vertical direction. The upper end of each push rod 22 is detachably fixed to the return plate 5, and the lower end passes through the upper template 3 and is connected to the drive member 14. The drive member 14 can drive several push rods 22 to rise and fall synchronously.

[0046] Specifically, the press-fit mold for the fan rotor shaft 8 and rotor housing 7 in this solution also includes a push plate 2. The lower ends of each push rod 22 are detachably fixedly connected to the push plate 2. The push plate 2 is located below the upper template 3 and is mounted on the upper end of the drive member 14. The drive member 14 can drive the push plate 2 to move up and down. The push plate 2 may also have a second center hole 25 at its center. The second center hole 25 can reduce weight and can be selected or omitted depending on the actual situation.

[0047] Specifically, two guide posts 12 are fixed at intervals on the lower template 1, and a return spring 13 is sleeved on the outside of each guide post 12. The push plate 2 is provided with through holes 21 through which each guide post 12 can pass. The cross-sectional size of the return spring 13 is larger than the size of the through hole 21. Each return spring 13 can be connected to the lower end of the push plate 2. The setting of the return spring 13 makes the fall of the push plate 2 more stable.

[0048] Specifically, the upper template 3 is also provided with through holes 31 corresponding to each of the push rods 22. A linear bearing 32 is installed in each of the through holes 31. The linear bearing 32 is provided with a shaft hole 321, and the push rod 22 can pass through each shaft hole 321.

[0049] Specifically, the rotor placement mold core 6 includes a core mold 62 and a base 63 fixedly connected from top to bottom. The cross-sectional dimension of the base 63 is larger than that of the core mold 62. The fixing hole 621 is located on the core mold 62, and the core mold 62 can be inserted into the limiting groove 41. The rotor shell 7 can be fitted over the core mold 62. The base 63 is detachably fixedly connected to the upper template 3.

[0050] Specifically, the upper template 3 is provided with at least two positioning posts 33 spaced apart at its upper end, and the base 63 is provided with positioning holes 631 for matching each of the positioning posts 33. The base 63 is also provided with mating holes 632 for inserting the upper end of the linear bearing 32, and a plurality of first connecting holes 633 for fixing the base 63 to the upper template 3. The number of first connecting holes 633 can be set to four, and corresponding bolts or screws can be inserted into the first connecting holes 633 to fix the upper template 3 to the rotor placement mold core 6.

[0051] Specifically, the first central hole 51 of the return plate 5 is a stepped hole. The first central hole 51 includes a first hole segment and a second hole segment arranged sequentially from top to bottom and interconnected with each other. A stepped surface 52 is provided between the first hole segment and the second hole segment. The lower end of the rotor housing 7 can abut against the stepped surface 52. The lower end of the rotor housing 7 can be inserted into the first hole segment. The diameter of the second hole segment is adapted to the diameter of the mold core. The bottom end of the upper mold 4 is pressed onto the housing and abuts against the upper surface of the return plate 5.

[0052] Specifically, the lower template 1 is also equipped with a pneumatic manual valve 15 for controlling the start and stop of the cylinder, which can be manually operated. The driving component 14 is provided with a driving shaft 141, which is a cylinder. A top plate 142 is installed on the upper end of the driving shaft 141, and the lower end is slidably inserted into the cylinder, extending or retracting vertically. The top plate 142 is horizontally arranged and parallel to the push plate 2. The lifting and lowering of the driving shaft 141 can drive the top plate 142 to lift and lower, thereby pushing the push plate 2 upward. The upper surface of the top plate 142 can abut against the push plate 2. The cylinder is also provided with two opposing cylinder guide posts 143, which are located on both sides of the driving shaft 141 and parallel to it. They have a guiding function during the lifting and lowering process of the driving shaft 141, making the lifting and lowering process of the driving shaft 141 more stable, and thus avoiding damage caused by the tilting of the driving shaft 141. The pneumatic manual valve 15 can adopt a conventional control valve structure, and the connection between the pneumatic manual valve 15 and the cylinder can also be conventional, so as to control the start and stop of the cylinder, thereby controlling the extension or retraction of the drive shaft 141. The structural features of other parts of the drive component 14 can be achieved by conventional technical means, or conventional cylinders can be selected.

[0053] The press-fit mold for the fan rotor shaft 8 and rotor housing 7 in this design has four first mounting holes 16 at the center of the lower template 1, which correspond one-to-one with the mounting holes at the bottom of the connecting thin cylinder. The cylinder can be fixed to the lower template 1 with bolts. Four second mounting holes 17 are provided on the outer side of the center of the lower template 1, allowing the bottom of each connecting post 11 to be inserted. Two guide posts 12 are installed on both sides of the cylinder, and a return spring 13 is sleeved on the outer side of the guide post 12. A third mounting hole 18 is provided on one side of the upper end of the lower template 1 for bolt connection with the pneumatic manual valve 15. Two fourth mounting holes 23 are provided on the push plate 2, which correspond one-to-one with the mounting holes at the upper end of the cylinder and are connected with bolts. Four fifth mounting holes 24 are provided on the outer side of the center of the push plate 2, each corresponding one-to-one with the push rod 22. Bolts can be inserted into the fifth mounting holes 24 to connect with the bottom of the push rod 22 to fix the four push rods 22. The through holes 21 through which each guide post 12 can pass are located on the outer side of the center of the push plate 2. The upper template 3 also has two vent holes 34 for venting during press-fitting. The upper template 3 also has four sixth mounting holes 35 for use with bolts to fix the rotor placement mold core 6. The two positioning posts 33 of the upper template 3 match the positioning holes 631 of the rotor placement mold core 6. The outermost area of ​​the upper template 3 has seventh mounting holes 36 that correspond one-to-one with each connecting post 11. The upper template 3 is equipped with a linear bearing 32 through which the push rod 22 can pass. The linear bearing 32 is installed on the upper template 3 near its outermost area. The fixing hole 621 is located at the first center hole 51 of the rotor placement mold core 6 and is used to place the rotor shaft 8. Vent holes are also provided on both sides of the fixing hole 621. The two vent holes are spaced apart and their lower ends correspond to an exhaust hole 34 respectively. Each vent hole and exhaust hole 34 correspond one-to-one and are connected to achieve exhaust. The base 63 is also provided with four first connecting holes 633 and is connected to the upper template 3 by bolts. Two positioning holes 631 are located on the outside of the base 63 and are matched and connected to the two positioning posts 33 of the upper template 3. The outside of the base 63 is also provided with four larger mating holes 632 for the linear bearing 32 to be inserted. The return plate 5 is provided with four second connecting holes 53 for bolt connection to the top of the push rod 22. The lower end of the housing is inserted into the return plate 5 to a height of about 6mm.

[0054] During press fitting, the rotor shaft 8 is placed into the fixing hole 621, the rotor housing 7 is inserted into the housing limiting hole, and the upper end of the housing is placed into the limiting groove 41 of the housing press fitting mold 4. The hydraulic press is started to press downwards, pressing the rotor shaft 8 into the center of the rotor housing 7. After the press fitting is in place, the hydraulic press is released, the manual pneumatic switch valve is turned on, and the cylinder is started, so that the cylinder drive shaft 141 and the top plate 142 push the push plate 2 upwards, thereby causing the return plate 5 to push the housing press fitting mold 4 and the rotor housing 7 upwards, realizing unloading.

[0055] Other aspects of the press-fitting mold for the fan rotor shaft and rotor housing described in this utility model are available in the prior art and will not be repeated here.

[0056] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A press-fit mold for a fan rotor shaft and rotor housing, characterized in that: The assembly includes a frame and an upper template, a drive unit, a rotor placement mold core, a return plate, a housing pressing mold, and a hydraulic press mounted on the frame. The housing pressing mold has a downward-facing limiting groove for inserting the upper part of the rotor housing. The rotor placement mold core is mounted on the top of the upper template and located below the housing pressing mold. The rotor placement mold core has a fixing hole at its center for vertical insertion of the lower part of the rotor shaft. The hydraulic press is used to press down the housing pressing mold. The return plate is annular and located between the rotor placement mold core and the outer shell pressing mold. The return plate has a first central hole. The upper end of the return plate abuts against the bottom surface of the outer shell pressing mold and the bottom surface of the rotor outer shell. The driving component is installed on the lower part of the frame and is used to lift the return plate upward.

2. The press-fit mold for the fan rotor shaft and rotor housing according to claim 1, characterized in that: The frame is also provided with a lower template and several connecting columns. The lower template is located below the upper template. The driving component is installed on the lower template. The two ends of each connecting column are detachably fixedly connected to the lower template and the upper template, respectively.

3. The press-fit mold for the fan rotor shaft and rotor housing according to claim 2, characterized in that: It also includes several push rods that are parallel and spaced apart in the vertical direction. The upper end of each push rod is detachably fixed to the return plate, and the lower end passes through the upper template and is connected to the driving component. The driving component can drive the push rods to rise and fall synchronously.

4. The press-fit mold for the fan rotor shaft and rotor housing according to claim 3, characterized in that: It also includes a push plate, the lower end of each push rod is detachably fixedly connected to the push plate, the push plate is located below the upper template, the push plate is installed on the upper end of the drive member, and the drive member can drive the push plate to rise and fall.

5. The press-fit mold for the fan rotor shaft and rotor housing according to claim 4, characterized in that: Two guide posts are fixed at intervals on the lower template. A reset spring is sleeved on the outside of each guide post. The push plate is provided with a through hole through which each guide post can pass. The cross-sectional size of the reset spring is larger than the size of the through hole. Each reset spring can be connected to the lower end of the push plate.

6. The press-fit mold for the fan rotor shaft and rotor housing according to claim 5, characterized in that: The upper template is also provided with through holes corresponding to each of the push rods. A linear bearing is installed in each of the through holes. The linear bearing is provided with a shaft hole, and the push rod can pass through each shaft hole.

7. The press-fit mold for the fan rotor shaft and rotor housing according to claim 6, characterized in that: The rotor placement mold core includes a core mold and a base that are fixedly connected from top to bottom. The cross-sectional dimension of the base is larger than that of the core mold. The fixing hole is located on the core mold, and the core mold can be inserted into the limiting groove. The rotor shell can be fitted over the core mold. The base is detachably fixedly connected to the upper template.

8. The press-fit mold for the fan rotor shaft and rotor housing according to claim 7, characterized in that: The upper end of the upper template is also provided with at least two positioning posts spaced apart, and the base is provided with positioning holes that can be matched with each of the positioning posts.

9. The press-fit mold for the fan rotor shaft and rotor housing according to claim 8, characterized in that: The first central hole is a stepped hole, which includes a first hole segment and a second hole segment arranged sequentially from top to bottom and interconnected with each other. A stepped surface is provided between the first hole segment and the second hole segment. The lower end of the rotor housing can abut against the stepped surface and the lower end of the rotor housing can be inserted into the first hole segment. The diameter of the second hole segment is adapted to the diameter of the mold core. The bottom end of the upper mold of the housing can abut against the upper surface of the return plate.

10. The press-fit mold for the fan rotor shaft and rotor housing according to claim 5, characterized in that: The driving component is a cylinder, and a pneumatic manual valve for controlling the start and stop of the cylinder is also installed on the lower template; the driving component is provided with a driving shaft, and a top plate is installed on the upper end of the driving shaft. The top plate is horizontally set and parallel to the push plate. The driving shaft can drive the top plate to rise and fall, and the upper surface of the top plate can abut against the push plate.

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