Coaxiality fixing tool for motor shell machining

Abstract

The utility model belongs to the technical field of motor casing machining, and particularly relates to a motor casing machining coaxiality fixing tool which comprises a clamping fixture mandrel. The mould expansion core is used for fixing the motor shell; the movable pressure head is used for adjusting the expansion and contraction of the mould expansion core; the clamping fixture expansion core and the movable pressure head are sleeved on the clamping fixture mandrel; the clamping fixture expansion core is in sliding fit with the movable pressure head; the clamping fixture expansion core is driven to be in contact with the conical block by utilizing the force applied to the clamping fixture expansion core by the movable pressure head, and the end part of the clamping fixture expansion core can be pressed to be expanded under the extrusion of the conical block and the movable pressure head by continuously moving the movable pressure head, so that the clamping fixture expansion core is propped against the inner wall of the motor shell, and the motor shell is fixed while the motor shell is fixed. Therefore, the two ends of the motor casing are abutted tightly, and the seam allowances and the seam allowance planes at the two ends of the motor casing are ensured to be coaxial with the mould mandrel in the machining process of the motor casing.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor casing processing, in particular to a coaxiality fixing tool for motor casing processing. Background Art

[0002] At present, with the rapid development of economy, more and more occasions and environments need to use high-speed motors. In recent years, the production and development of high-speed motors has also been rapidly developed. High-speed motors are famous for their high speed. Many motor factories and scientific research institutes at home and abroad are developing and producing high-speed motors, such as the currently available air-floating high-speed motors, oil-floating high-speed motors, magnetic levitation high-speed motors, and traditional mechanical bearing high-speed motors;

[0003] High-speed motors have gradually been integrated into the production process, but the quality and stability of high-speed motors are a difficult problem in the production process, which requires high-precision processing equipment, high-quality and efficient processing technology and tooling, especially the coaxiality and processing accuracy of the bearing installation parts at the front and rear ends; the high-precision requirements of high-speed motor parts are currently a huge challenge for processing companies, so it is necessary to continuously improve, innovate and verify the processing of high-speed motor parts.

[0004] To this end, the utility model provides a motor casing machining coaxiality fixing tool. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the utility model to solve the technical problem is: a motor housing processing coaxiality fixing tool described in the utility model comprises:

[0007] Tyre mandrel;

[0008] A mold expansion core used to fix the motor housing;

[0009] A movable pressure head for adjusting the expansion and contraction of the tire core;

[0010] A cone block is fixedly connected to the middle of the mold core shaft, and a sleeve shaft is arranged adjacent to the cone block; the movable pressure head is sleeved on the sleeve shaft; the mold expansion core and the movable pressure head are both sleeved on the sleeve shaft; the mold expansion core is slidably matched with the movable pressure head and the cone block.

[0011] Preferably, a core expansion plate is sleeved on the mold mandrel, and the core expansion plate is used to squeeze the movable pressure head to move.

[0012] Preferably, a threaded mating section is provided on the adjacent side of the sleeve shaft, and a locking nut is threadedly connected to the threaded mating section; a nut pull rod is inserted into the outer periphery of the locking nut; and both ends of the core expansion pressure plate are respectively abutted against the movable pressure head and the locking nut.

[0013] Preferably, both ends of the tire expansion core are provided with a core expansion active section, and a flange is provided on the inner side of the middle part of the tire expansion core; the tire expansion core is sleeved with the sleeve shaft through the flange; the core expansion active section is slidably matched with the active pressure head and the cone block.

[0014] Preferably, a core expanding inclined surface is provided at the bottom of the core expanding movable section, and a pressing head inclined surface is provided at the top of the movable pressing head; the core expanding inclined surfaces at both ends are slidably matched with the pressing head inclined surface and the surface of the cone block respectively.

[0015] Preferably, a clearance groove is provided on one side of the movable pressing head relative to the sleeve shaft, and the sleeve shaft is inserted into the clearance groove.

[0016] The beneficial effects of the utility model are as follows:

[0017] 1. The utility model discloses a motor casing processing coaxiality fixing tool, which utilizes the force exerted by the movable pressure head on the jig core to drive the jig core to contact the cone block, and continues to move the movable pressure head to cause the end of the jig core to expand under the pressure of the cone block and the movable pressure head, so that the jig core is pressed against the inner wall of the motor casing, thereby fixing the motor casing and making both ends of the motor casing pressed, ensuring that the stoppers and stopper planes at both ends of the motor casing are coaxial with the jig core axis during the machining process.

[0018] 2. The utility model describes a motor casing processing coaxiality fixing tool, which utilizes the inclined surface of the active pressure head to squeeze the inclined surface of the core expansion. Due to the pressure, the entire mold core expansion is passively displaced until the mold core expansion contacts the cone block. At this time, both ends of the mold core expansion are subjected to pressure. When the active pressure head continues to move toward the middle of the motor casing, the cone block and the inclined surface of the pressure head respectively exert pressure on the two inclined surfaces of the core expansion, so that the two active sections of the core expansion are expanded, so that the motor casing can be tightened from the inside to achieve fixation of the motor casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a structural schematic diagram of the utility model;

[0021] Figure 2 It is a schematic diagram of the core shaft of the tire in the utility model;

[0022] Figure 3 It is a schematic diagram of the core expansion of the tire in the utility model;

[0023] Figure 4 It is a schematic diagram of the movable pressure head in the utility model;

[0024] Figure 5 It is a schematic diagram of the core expansion pressure plate in the utility model;

[0025] In the figure: 1. motor housing; 2. core expansion jig; 21. core expansion movable section; 22. core expansion inclined surface; 23. flange; 3. movable pressure head; 31. pressure head inclined surface; 32. clearance groove; 4. core expansion pressure plate; 5. locking nut; 6. nut pull rod; 7. jig core shaft; 71. cone block; 72. thread matching section; 73. sleeve shaft. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0027] like Figure 1 to Figure 2 As shown, a coaxiality fixing tool for machining a motor housing 1 according to an embodiment of the utility model comprises:

[0028] Tyre mandrel 7;

[0029] A mold expansion core 2 for fixing the motor housing 1;

[0030] A movable pressure head 3 for adjusting the expansion and contraction of the tire expansion core 2;

[0031] A cone block 71 is fixedly connected to the middle of the mold core shaft 7, and a sleeve shaft 73 is provided adjacent to the cone block 71; the movable pressure head 3 is sleeved on the sleeve shaft 73; the mold expansion core 2 and the movable pressure head 3 are both sleeved on the sleeve shaft 73; the mold expansion core 2 is slidably matched with the movable pressure head 3 and the cone block 71;

[0032] When in use, the fixed tool provided by the utility model is mainly suitable for the coaxiality processing of the stop and stop plane at the bearing installation positions at both ends of the motor casing 1. When processing the motor casing 1, the motor casing 1 to be processed is first sleeved on the outer periphery of the mold expansion core 2, and then the movable pressure head 3 is controlled to move axially along the mold core shaft 7, and specifically, the movable pressure head 3 is controlled to continuously move toward the middle of the motor casing 1 so that the movable pressure head 3 contacts the end of the mold expansion core 2, and the force applied by the movable pressure head 3 on the mold expansion core 2 is used to drive the mold expansion core 2 to contact the cone block 71, and the movable pressure head 3 is continued to move. Under the extrusion of the cone block 71 and the movable pressure head 3, the end of the mold expansion core 2 is pressed and expanded, so that the mold expansion core 2 is pressed against the inner wall of the motor casing 1, and the motor casing 1 is fixed while both ends of the motor casing 1 are pressed, ensuring that the stop and stop planes at both ends of the motor casing 1 are coaxial with the mold core shaft 7 during the processing;

[0033] There are also hole cone surfaces on both sides of the mold core shaft 7 for connecting processing equipment, and specifically, the processing equipment matched with the tooling is a double-thimble processing equipment, and the double thimbles are connected to the two hole cone surfaces.

[0034] like Figure 1 , Figure 4 As shown, a core expansion plate 4 is sleeved on the mold mandrel 7, and the core expansion plate 4 is used to squeeze the movable pressing head 3 to move.

[0035] The fixing tool provided by the utility model also discloses a core expansion pressure plate 4. During the use stage, by driving the core expansion pressure plate 4 to continuously move toward the middle of the motor casing 1, the movable pressure head 3 can be driven to synchronously slide toward the middle of the motor casing 1, thereby opening the mold to expand the core 2, and using the mold to expand the core 2 to fix the motor casing 1.

[0036] like Figure 1 to Figure 2 As shown, a threaded mating section 72 is provided on the adjacent side of the sleeve shaft 73, and a locking nut 5 is threadedly connected to the threaded mating section 72; a nut pull rod 6 is inserted into the outer periphery of the locking nut 5; and both ends of the core expansion pressure plate 4 are respectively in contact with the movable pressure head 3 and the locking nut 5.

[0037] When the movable pressing head 3 in the fixed tool provided by the utility model moves, the locking nut 5 is threadedly connected with the threaded matching section 72 on the sleeve shaft 73, and the nut pull rod 6 is manually rotated, so that the locking nut 5 is continuously moved toward the middle of the motor housing 1, and the core expansion pressure plate 4 is continuously pressed, and the movable pressing head 3 is driven by the core expansion pressure plate 4 to squeeze the mold core 2, thereby completing the tightening of the motor housing 1;

[0038] Among them, it is worth noting that the nut pull rod 6 needs to be removed before processing, and the nut pull rod 6 needs to be installed after the processing is completed, and the locking nut 5 is loosened. The mold core 2 has no external force at this time and thus shrinks. The motor housing 1 is also not subjected to the expansion force of the mold core 2 at this time, so it is easy to take it down and complete the processing of the housing.

[0039] like Figure 1 , Figure 3 As shown, both ends of the tire core 2 are provided with a core expansion active section 21, and a flange 23 is provided on the inner side of the middle part of the tire core 2; the tire core 2 is sleeved with the sleeve shaft 73 through the flange 23; the core expansion active section 21 is slidably matched with the movable pressure head 3 and the cone block 71.

[0040] The core expansion active segment 21 provided by the utility model is used to tighten the motor casing 1 from the inside of the motor casing 1. Specifically, when in use, the flange 23 is used to realize the connection between the mold core expansion 2 and the sleeve shaft 73, and then the movable pressing head 3 is moved to squeeze one core expansion active segment 21 of the mold core expansion 2. Due to the pressure, the other core expansion active segment 21 and the cone block 71 are forced to be squeezed. Therefore, in the process of the movable pressing head 3 continuously moving toward the middle of the motor casing 1, the cone block 71 and the movable pressing head 3 can work together to tighten the motor casing 1 from the inside, and keep the stoppers at both ends of the motor casing 1 and the stopper plane coaxial with the mold core shaft 7.

[0041] like Figures 2 to 4 As shown, the bottom of the core expanding movable section 21 is provided with a core expanding inclined surface 22, and the top of the movable pressing head 3 is provided with a pressing head inclined surface 31; the core expanding inclined surfaces 22 at both ends are slidably matched with the pressing head inclined surface 31 and the surface of the cone block 71 respectively.

[0042] When the core expanding active section 21 provided by the utility model is in use, the pressure head inclined surface 31 on the active pressure head 3 is used to squeeze the core expanding inclined surface 22. Due to the pressure, the tire core 2 is passively displaced as a whole until the tire core 2 contacts the cone block 71. At this time, both ends of the tire core 2 are subjected to pressure. When the active pressure head 3 continues to move toward the middle of the motor housing 1, the cone block 71 and the pressure head inclined surface 31 respectively generate pressure on the two core expanding inclined surfaces 22, so that the two core expanding active sections 21 are both expanded, so that the motor housing 1 can be tightened from the inside to achieve fixation of the motor housing 1.

[0043] like Figure 4 As shown, a clearance groove 32 is formed on one side of the movable pressing head 3 relative to the sleeve shaft 73 , and the sleeve shaft 73 is inserted into the clearance groove 32 .

[0044] When the movable pressing head 3 provided by the utility model is in use, the clearance groove 32 opened on one side thereof is first used to connect with the sleeve shaft 73. During the movement of the movable pressing head 3, until the sleeve shaft 73 abuts against the bottom surface of the clearance groove 32, the movable pressing head 3 cannot continue to move, which plays a limiting effect, preventing the movable pressing head 3 from continuously moving and excessively squeezing the core expanding movable section 21, causing the core expanding movable section 21 to deform too much and cause the risk of breakage.

[0045] Working principle: When the motor housing 1 is processed, the tooling for fixing the motor housing 1 cannot ensure the coaxiality of the motor housing 1 during processing. As a result, after the motor housing 1 is processed, the coaxiality and processing accuracy of the bearing installation parts at the front and rear ends cannot be guaranteed. The processed motor housing 1 has a high defective rate, which is prone to risks during use.

[0046] In view of the above, the fixed tool provided by the utility model is mainly suitable for the coaxiality processing of the stop and stop plane at the bearing installation positions at both ends of the motor casing 1. When processing the motor casing 1, the motor casing 1 to be processed is first sleeved on the outer periphery of the mold expansion core 2, and then the movable pressure head 3 is controlled to move axially along the mold core shaft 7, and specifically, the movable pressure head 3 is controlled to continuously move toward the middle of the motor casing 1 so that the movable pressure head 3 contacts the end of the mold expansion core 2, and the force applied by the movable pressure head 3 on the mold expansion core 2 is used to drive the mold expansion core 2 to contact the cone block 71. Continuing to move the movable pressure head 3 can cause the end of the mold expansion core 2 to be pressed and expanded under the extrusion of the cone block 71 and the movable pressure head 3, so that the mold expansion core 2 is pressed against the inner wall of the motor casing 1, and the motor casing 1 is fixed while both ends of the motor casing 1 are pressed, ensuring that the stop and stop planes at both ends of the motor casing 1 are coaxial with the mold core shaft 7 during the processing;

[0047] When the movable pressing head 3 moves, the locking nut 5 is threadedly connected with the threaded matching section 72 on the sleeve shaft 73, and the nut pull rod 6 is manually rotated, so that the locking nut 5 is continuously moved toward the middle of the motor housing 1, and the core expansion pressure plate 4 is continuously pressed, and the movable pressing head 3 is driven by the core expansion pressure plate 4 to squeeze the mold core 2, thereby completing the tightening of the motor housing 1;

[0048] Specifically, the pressure head inclined surface 31 on the movable pressure head 3 is used to squeeze the core expansion inclined surface 22. Due to the pressure, the tire core 2 is passively displaced as a whole until the tire core 2 contacts the cone block 71. At this time, both ends of the tire core 2 are subjected to pressure. When the movable pressure head 3 continues to move toward the middle of the motor housing 1, the cone block 71 and the pressure head inclined surface 31 respectively exert pressure on the two core expansion inclined surfaces 22, so that the two core expansion active sections 21 are both expanded, so that the motor housing 1 can be tightened from the inside to achieve fixation of the motor housing 1.

[0049] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A coaxiality fixing tool for machining a motor housing, characterized in that: include: A mold mandrel (7); A jig expansion core (2) for fixing the motor housing (1); A movable pressure head (3) for adjusting the expansion and contraction of the tire expansion core (2); Features: A cone block (71) is fixedly connected to the middle of the mold core shaft (7), and a sleeve shaft (73) is provided adjacent to the cone block (71); the movable pressure head (3) is sleeved on the sleeve shaft (73); the mold expansion core (2) and the movable pressure head (3) are both sleeved on the sleeve shaft (73); the mold expansion core (2) is slidably matched with the movable pressure head (3) and the cone block (71).

2. The motor housing machining coaxiality fixing tool according to claim 1, characterized in that: The mold core shaft (7) is also sleeved with a core expansion pressure plate (4), and the core expansion pressure plate (4) is used to squeeze the movable pressure head (3) to move.

3. The motor housing machining coaxiality fixing tool according to claim 2, characterized in that: A threaded mating section (72) is provided on the adjacent side of the sleeve shaft (73), and a locking nut (5) is threadedly connected to the threaded mating section (72); a nut pull rod (6) is inserted into the outer periphery of the locking nut (5); and two ends of the core expansion pressure plate (4) are respectively in contact with the movable pressure head (3) and the locking nut (5).

4. The motor housing machining coaxiality fixing tool according to claim 3, characterized in that: Both ends of the tire expansion core (2) are provided with a core expansion movable section (21), and a flange (23) is provided on the inner side of the middle portion of the tire expansion core (2); the tire expansion core (2) is sleeved with the sleeve shaft (73) via the flange (23); the core expansion movable section (21) is slidably matched with the movable pressure head (3) and the cone block (71).

5. The motor housing machining coaxiality fixing tool according to claim 4, characterized in that: The bottom of the core expanding movable section (21) is provided with a core expanding inclined surface (22), and the top of the movable pressing head (3) is provided with a pressing head inclined surface (31); the core expanding inclined surfaces (22) at both ends are respectively slidably matched with the pressing head inclined surface (31) and the surface of the cone block (71).

6. The motor housing machining coaxiality fixing tool according to claim 5, characterized in that: A clearance groove (32) is provided on one side of the movable pressing head (3) relative to the sleeve shaft (73), and the sleeve shaft (73) is inserted into the clearance groove (32).

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