Stator and motor shell assembling equipment

Abstract

The utility model discloses assembling equipment for a stator and a motor shell. The assembling equipment comprises a workbench, a clamping device and a press-fitting mechanism, the workbench is provided with a supporting seat used for fixing a stator, the clamping device comprises at least two clamping pieces and a first driving mechanism, and the clamping pieces have a first state which surrounds the peripheral surface of the stator and is used for clamping the stator and a second state which is far away from the peripheral surface of the stator and is used for loosening the stator; the first driving mechanism is used for driving the clamping piece to move between a first state and a second state; the press-fitting mechanism at least comprises a pressing plate arranged corresponding to the supporting base and a second driving mechanism, and the second driving mechanism is used for driving the pressing plate to move relative to the supporting base. The assembling equipment for the stator and the motor shell has the advantages that the structure is simple, the assembling efficiency is high, the spliced stator is assembled into a whole without a welding process, the roundness tolerance of the inner circle and the outer circle of the spliced stator is easy to control, and the stator and the motor shell are easy to assemble and are not easy to rub.

Description

Technical Field

[0001] The utility model relates to the field of motors, in particular to an assembly device for a stator and a motor housing. Background Art

[0002] A motor is an electromagnetic device that converts or transmits electrical energy according to the law of electromagnetic induction. Its main task is to convert the input electrical energy into mechanical energy to drive the normal operation of various equipment. The motor is mainly composed of three key parts: the motor housing, the stator and the rotor. The rotor is equipped with an armature winding. When powered on, it will generate an induced electromotive force, form a rotating magnetic field and generate electromagnetic torque, thereby completing the energy conversion process. The stator, as a fixed part of the motor, is responsible for generating a rotating magnetic field.

[0003] There are two main forms of stator structure: whole piece and block type. The whole piece stator core is made of a whole circular punching sheet and welded or riveted to a certain thickness according to the needs. However, this method has some disadvantages, such as low utilization rate of raw materials for the core punching sheet, complex winding process, unsatisfactory slot fill rate and high cost.

[0004] In comparison, the block stator shows more advantages, such as higher raw material utilization, optimized slot fill rate and easy to automate the winding process. Therefore, in most motor application scenarios, the block core has gradually replaced the whole stator core. The block stator is composed of multiple stator blocks, each of which is wound independently and then spliced ​​to form a complete stator structure.

[0005] However, the existing assembly method between the block-type stator core and the motor housing still has certain technical challenges. Usually, this assembly method is to first splice the individual stator blocks into an integral structure, and then install it into the motor housing. In this process, the stator blocks need to be assembled through a complex splicing process, and the seams between each stator block need to be connected through a welding process. But this method may cause some technical problems.

[0006] First, the block-type stator is prone to deformation and uneven stress distribution after welding. This will not only affect the roundness of the inner circle of the stator, and thus have an adverse effect on the overall cogging torque and torque pulsation of the motor; but the welding process may also cause short circuit problems between the stator silicon steel sheets, thereby reducing the overall performance of the motor.

[0007] Secondly, the assembly process of the stator and the motor housing adopts interference fit and shrinkage installation. This installation method requires the motor housing to be heated to achieve expansion. However, due to the unevenness of the motor housing structure and the heating coil, the motor housing often expands and deforms unevenly during the heating process. Especially in the circumferential direction of the motor housing, the area with less expansion is prone to scratching against the stator. When the housing temperature drops and shrinks, this scratch may be further aggravated, and even lead to damage to the stator and a decrease in the overall performance of the motor. Summary of the invention

[0008] The technical problem to be solved by the utility model is to provide an assembly device for a stator and a motor housing which has a simple structure, high assembly efficiency, a block-type stator which does not require welding technology to be assembled into a whole, is easy to control the roundness tolerance of the inner circle and the outer circle of the assembled stator, and is simple to assemble between the stator and the motor housing and is not prone to scratches.

[0009] In order to solve the above technical problems, the utility model provides a technical solution, a stator and motor housing assembly device, at least comprising:

[0010] A workbench, wherein a support base for fixing the stator is provided on the workbench;

[0011] A clamping device, the clamping device comprising at least two clamping members surrounding the support seat and a first driving mechanism, the clamping member having a first state of enclosing the outer surface of the stator and used to clamp the stator and a second state of being away from the outer surface of the stator and used to release the stator, the first driving mechanism being used to drive the clamping member to move between the first state and the second state;

[0012] The press-fitting mechanism at least comprises a press plate located above the support seat and a second driving mechanism for driving the press plate to move relative to the support seat.

[0013] In a preferred embodiment, the clamping member is slidably connected to the workbench.

[0014] In a preferred embodiment, the clamping member includes a first clamping member and a second clamping member which are symmetrically arranged, and the first clamping member and the second clamping member are correspondingly provided with grooves formed by being recessed inward from the top end, and the first clamping member and the second clamping member abut against each other in the first state and the grooves enclose to form a clamping cavity for clamping the outer surface of the stator.

[0015] In a preferred embodiment, the first clamping member includes a first clamping portion provided with the groove and a first sliding portion formed by extending outward from one end of the first clamping portion away from the second clamping member, and the second clamping member includes a second clamping portion provided with the groove and a second sliding portion formed by extending outward from one end of the second clamping portion away from the first clamping member, and the first sliding portion and the second sliding portion are both adapted to be connected to the workbench via a guide rail-slider structure.

[0016] In a preferred embodiment, the top end of the first clamping portion is recessed inwardly to form a plurality of positioning grooves located on both sides of the groove, and the top end of the second clamping portion is protruded outwardly to form a plurality of positioning portions corresponding one-to-one to the positioning grooves.

[0017] In a preferred embodiment, positioning blocks fixedly connected to the workbench and matched with the second clamping portion are provided on both sides of the first clamping member for positioning the second clamping member in a sliding direction.

[0018] In a preferred embodiment, the workbench is provided with a frame, and the frame is provided with position sensors corresponding to the first clamping member and the second clamping member one by one, for detecting and identifying the position states of the first clamping member and the second clamping member.

[0019] In a preferred embodiment, the support seat is located below the clamping cavity and is fixedly connected to the workbench, the pressure plate is located above the clamping cavity and is movably connected to the frame, and the second driving mechanism is used to drive the pressure plate to approach and move away from the support seat along the axis direction of the clamping cavity.

[0020] In a preferred embodiment, the pressing mechanism also includes a mounting plate slidably connected to the frame along a direction perpendicular to the axis of the clamping cavity and a third driving mechanism for driving the mounting plate to slide relative to the frame, the mounting plate is provided with a slot hole, the second driving mechanism is mounted on the mounting plate and the output end passes through the slot hole and is fixedly connected to the pressing plate.

[0021] In a preferred embodiment, a side of the support seat close to the clamping cavity is recessed inward to form a mounting groove.

[0022] Compared with the prior art, the assembly equipment of the stator and the motor housing of the utility model has the following advantages:

[0023] Beneficial effects:

[0024] (1) The stator and motor housing assembly equipment of the utility model includes a workbench, a clamping device and a press-fitting mechanism. The clamping device includes at least two clamping members and a first driving mechanism. The clamping members have a first state of enclosing the outer surface of the stator and used to clamp the stator and a second state of being away from the outer surface of the stator and used to loosen the stator. The clamping members enclose and clamp the outer surface of the stator, which makes it easy to control the roundness tolerance of the inner circle and the outer circle of the block-type stator, thereby ensuring that the contact surface between the stator and the motor housing is not prone to scratches, ensuring the performance of the motor, and at the same time reducing the process of assembly of the block-type stator through welding process, simplifying the assembly process, and improving production efficiency. A support seat for fixing the stator is provided on the workbench, and the press-fitting mechanism includes at least a pressure plate located above the support seat and corresponding to the support seat, ensuring the coaxiality of the stator to be assembled and the motor housing, ensuring the coaxiality of the stator to be assembled and the motor housing, and improving the assembly accuracy.

[0025] (2) The utility model relates to an assembly device for a stator and a motor housing, wherein a clamping member is composed of a first clamping member and a second clamping member that are symmetrically arranged, and both of them are correspondingly provided with grooves formed by inward depressions from the top ends. When the first clamping member and the second clamping member are in a first state and abut against each other, these grooves will enclose and form a clamping cavity for clamping the outer surface of the stator. The shape of the clamping cavity is adapted to the outer surface of the stator to be assembled, which not only improves the stability and accuracy of the clamping, but also ensures that the first clamping member and the second clamping member can evenly apply pressure to the outer surface of the stator. This uniform force design avoids local deformation of the stator due to uneven force, thereby ensuring that the roundness of the inner and outer circles of the stator as a whole is not affected. The stability of the stator shape is crucial to the performance of the motor. Therefore, this clamping member design not only improves the efficiency and accuracy of the assembly process, but also helps to optimize the overall performance of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall assembly structure of an embodiment of an assembly device for a stator and a motor housing of the utility model;

[0027] Figure 2 It is a structural schematic diagram of a first clamping member and a second clamping member in a first state of an embodiment of an assembly device for a stator and a motor housing of the utility model;

[0028] Figure 3 It is a structural schematic diagram of a first clamping member of an embodiment of a stator and motor housing assembly device of the utility model;

[0029] Figure 4 It is a structural schematic diagram of a second clamping member of an embodiment of a stator and motor housing assembly device of the utility model;

[0030] Figure 5It is a structural schematic diagram of an embodiment of an assembly device for a stator and a motor housing of the utility model without a first clamping member;

[0031] Figure 6 It is a structural schematic diagram of a support base of an embodiment of an assembly device for a stator and a motor housing of the utility model;

[0032] Figure 7 It is a structural schematic diagram of a mounting plate of an embodiment of an assembly device for a stator and a motor housing of the utility model;

[0033] Figure 8 A schematic diagram of the stator block structure of a block-type stator in the prior art;

[0034] Fig. 9 A top view of a stator block of a block-type stator in the prior art;

[0035] Fig.10 The figure is a schematic diagram of the assembly structure of a block-type stator in the prior art.

[0036] Description of reference numerals:

[0037] 1- workbench; 11- support seat; 111- mounting slot; 12- guide rail-slider structure; 13- positioning block; 14- rack; 141- position sensor;

[0038] 2-clamping device; 21-clamping member; 211-first clamping member; 2111-first clamping portion; 2112-first sliding portion; 2113-positioning groove; 212-second clamping member; 2121-second clamping portion; 2122-second sliding portion; 2123-positioning portion; 213-groove; 22-first driving mechanism; 23-clamping cavity;

[0039] 3-pressing mechanism; 31-pressing plate; 32-second driving mechanism; 33-mounting plate; 331-slot hole; 34-third driving mechanism;

[0040] 4-stator; 41-stator block; 411-protrusion; 412-gap slot; 413-inner arc surface; 414-outer arc surface; 5-motor housing; DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0042] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, an integral connection, or a detachable connection; it can be the internal connection of two components; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] The assembly of the block stator and the motor housing has always been a technical problem in the motor manufacturing industry. The welded block stator is prone to deformation and uneven stress, and is prone to scratching the motor housing during the assembly process, resulting in damage to the stator and a decrease in the overall performance of the motor.

[0045] In view of this, the inventor proposes an assembly device for a stator and a motor housing. In order to facilitate the description of the use of the assembly device, a brief description is first given of the block-type stator that the assembly device faces.

[0046] like Figure 8 As shown, the shape of the stator block of the block-type stator in the prior art is roughly "T" shaped, and the axial dimension is adapted to the length of the iron core. A protrusion 411 extending along the axial direction is provided on one side of the stator block, and a gap groove 412 matching the protrusion is provided on the other side. The stator block is assembled with the adjacent stator block through the gap groove and the protrusion.

[0047] like Fig. 9 As shown, the other two sides of the stator block are provided with an inner arc surface 413 and an outer arc surface 414 .

[0048] like Fig.10 As shown, the stator blocks are sequentially spliced ​​to form the stator 4, the inner arc surface 413 encloses an inner circle for assembly with the iron core, and the outer arc surface 414 encloses an outer circle for assembly with the motor housing.

[0049] A stator and motor housing assembly device of this embodiment, such as Figure 1As shown, it includes a workbench 1, a clamping device 2 and a press-fitting mechanism 3. The clamping device includes at least two clamping members 21 and a first driving mechanism 22 located above the support seat 11. The clamping members have a first state of enclosing the outer surface of the stator for clamping the stator and a second state of being away from the outer surface of the stator for loosening the stator. The first driving mechanism is used to drive the clamping member to move between the first state and the second state. The clamping members enclose and clamp the outer surface of the stator, which makes it easy to control the roundness tolerance of the inner and outer circles of the block-type stator, thereby ensuring that the contact surface between the stator and the motor housing is not prone to scratches, ensuring the performance of the motor, and at the same time reducing the process of assembly of the block-type stator through welding process, simplifying the assembly process, and improving production efficiency.

[0050] Preferably, the clamping member 21 is slidably connected to the workbench 1, and the first driving mechanism 22 is used to drive the clamping member to switch between the first state and the second state along the sliding direction.

[0051] In this embodiment, the clamping member includes a first clamping member 211 and a second clamping member 212 which are symmetrically arranged. Figure 2 As shown, the first clamping member and the second clamping member are correspondingly provided with a groove 213 formed by the top end being recessed inwardly, and the first clamping member and the second clamping member abut against each other in the first state and the grooves enclose to form a clamping cavity 23 for clamping the outer surface of the stator. The shape of the clamping cavity is adapted to the outer surface of the stator to be assembled, which not only improves the stability and accuracy of the clamping, but also ensures that the first clamping member and the second clamping member can evenly apply pressure to the outer surface of the stator. This uniform force design avoids local deformation of the stator due to uneven force, thereby ensuring that the roundness of the inner circle and outer circle of the stator as a whole is not affected.

[0052] like Figure 3-4 As shown, the first clamping member includes a first clamping portion 2111 provided with a groove 213 and a first sliding portion 2112 formed by extending outward from one end of the first clamping portion away from the second clamping member, and the second clamping member includes a second clamping portion 2121 provided with a groove 213 and a second sliding portion 2122 formed by extending outward from one end of the second clamping portion away from the first clamping member.

[0053] Preferably, the top of the first clamping part is recessed inward to form a plurality of positioning grooves 2113 located on both sides of the groove 213, and the top of the second clamping part is protruded outward to form a plurality of positioning parts 2123 corresponding to the positioning grooves. The first clamping member and the second clamping member are in the first state, the first clamping part and the second clamping part are in a state of abutting each other, and the positioning part is embedded in the positioning groove, which effectively positions the first clamping member and the second clamping member in the encircled state, effectively prevents the first clamping member and the second clamping member from being misaligned, improves the stability of the stator clamping, and ensures that the first clamping member and the second clamping member exert force uniformly on the outer surface of the stator, so that the outer surface of the stator shrinks uniformly inward.

[0054] Preferably, the first clamping portion 2111 is provided with two positioning grooves which are symmetrically distributed on both sides of the groove 213 . Correspondingly, the second clamping portion 2121 is provided with two positioning portions which correspond one-to-one to the positioning grooves.

[0055] like Figure 1 As shown, in this embodiment, the first sliding part 212 and the second sliding part 222 are both adapted to be connected with the frame via a guide rail-slider structure 12. The first clamping member 211 and the second clamping member 212 are slidably connected with the workbench 1 via the guide rail-slider structure.

[0056] Preferably, positioning blocks 13 fixedly connected to the workbench 1 and adapted to the second clamping portion are provided on both sides of the first clamping member for positioning the sliding direction of the second clamping member. Such a structural design ensures that the sliding range of the first clamping member and the second clamping member can be accurately controlled during the encirclement process, effectively preventing them from exceeding the preset position. In this way, excessive pressure can be prevented from being applied to the outer surface of the stator, thereby preventing the stator from destructive deformation. Such a design is crucial to ensure the successful assembly of the stator and the motor housing, and ensures the smooth progress of the entire assembly process.

[0057] The workbench 1 is provided with a support base 11 for fixing the stator, and the press-fitting mechanism 3 at least includes a pressing plate 31 located above the supporting base 11 and arranged corresponding to the supporting base 11, and a second driving mechanism 32, and the second driving mechanism is used to drive the pressing plate to move relative to the supporting base. The coaxiality of the stator to be assembled and the motor housing is ensured, and the coaxiality of the stator to be assembled and the motor housing is ensured, and the assembly accuracy is improved.

[0058] like Figure 5 As shown, in this embodiment, the workbench 1 is provided with a frame 14, the support seat 11 is located below the clamping cavity 23 and is fixedly connected to the workbench 1, the pressing plate 31 is located above the clamping cavity 23 and is movably connected to the frame, and the second driving mechanism 32 is used to drive the pressing plate to move the axis direction of the clamping cavity close to the support seat 11 and away from the support seat 11. The support seat axially positions the stator during the press-fitting process between the stator and the motor housing.

[0059] like Figure 6 As shown, the side of the support seat 11 close to the clamping cavity 23 is recessed inward to form a mounting groove 111. The shape of the mounting groove is adapted to the outer surface of the stator, and the stator is positioned radially during the switching process of the first clamp and the second clamp from the second state to the first state.

[0060] Preferably, the press-fitting mechanism further comprises a mounting plate 33 slidably connected to the frame 14 along an axial direction perpendicular to the clamping cavity 33 and a third driving mechanism 34 for driving the mounting plate to slide relative to the frame.

[0061] like Figure 7 As shown, the mounting plate is provided with a slot hole 331, the second driving mechanism is mounted on the mounting plate and the output end passes through the slot hole and is fixedly connected to the pressing plate.

[0062] In this embodiment, a guide rail-slider structure is adapted to be connected between the mounting plate and the frame, and the third driving mechanism 34 drives the mounting plate 33 through the guide rail slider structure, thereby driving the second driving mechanism and the pressure plate to slide along the axis direction perpendicular to the clamping cavity 23.

[0063] like Figure 1 As shown, the frame 14 is provided with position sensors 141 corresponding to the first clamping member 211 and the second clamping member 212 one by one, and used for detecting and identifying the position states of the first clamping member and the second clamping member.

[0064] The working principle of the assembly equipment of the stator and the motor housing of this embodiment is as follows:

[0065] (1) The stator blocks are sequentially connected and assembled into a stator through the corresponding protrusions 411 and gap grooves 412, and the assembled stator is placed in the mounting groove 111 of the support seat 11 to position the stator axially and radially.

[0066] (2) The first driving mechanism 22 is controlled to drive the first clamping member and the second clamping member to move toward each other. The first clamping portion and the second clamping groove are combined to form a clamping cavity 23 to clamp the outer surface of the stator, thereby causing the outer surface of the stator to shrink inward.

[0067] (3) The position sensor 141 detects and identifies the position status of the first clamping member and the second clamping member, determines the clamping status, and controls the third drive mechanism 34 to drive the mounting plate 33, thereby driving the second drive mechanism and the pressure plate to slide away from the clamping cavity 23 along the axis direction perpendicular to the clamping cavity 23, leaving operating space for the placement of the motor housing.

[0068] (4) The motor housing after thermal expansion is sleeved on the outer surface of the stator, and the third driving mechanism 34 is controlled to drive the mounting plate 33, thereby driving the second driving mechanism and the pressure plate to slide close to the clamping cavity 23 along the axis direction perpendicular to the clamping cavity 23, so that the pressure plate, the support seat and the stator are on the same axis.

[0069] (5) Control the second driving mechanism 32 to drive the pressure plate 31 to approach the support seat 11 along the axis direction of the clamping cavity. The pressure plate abuts against the side of the motor housing away from the clamping cavity and applies pressure, so that the motor housing moves along the axis direction of the stator, thereby completing the assembly of the stator and the motor housing.

[0070] In short, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An assembly device for a stator and a motor housing, characterized in that: At least: A workbench (1), wherein a support seat (11) for fixing the stator is arranged on the workbench; A clamping device (2), the clamping device comprising at least two clamping members (21) surrounding the support seat and a first driving mechanism (22), the clamping members having a first state of enclosing the outer surface of the stator and used for clamping the stator and a second state of being away from the outer surface of the stator and used for loosening the stator, the first driving mechanism being used for driving the clamping members to move between the first state and the second state; A press-fitting mechanism (3), the press-fitting mechanism comprising at least a press plate (31) located above the support seat and a second drive mechanism (32) for driving the press plate to move relative to the support seat (11).

2. The stator and motor housing assembly device according to claim 1, characterized in that: The clamping member (21) is slidably connected to the workbench (1).

3. The stator and motor housing assembly device according to claim 2, characterized in that: The clamping member comprises a first clamping member (211) and a second clamping member (212) which are symmetrically arranged, and the first clamping member and the second clamping member are respectively provided with grooves (213) formed by being recessed inward from the top end, and the first clamping member and the second clamping member abut against each other in the first state, and the grooves enclose to form a clamping cavity (23) for clamping the outer surface of the stator.

4. The stator and motor housing assembly device according to claim 3, characterized in that: The first clamping member comprises a first clamping portion (2111) provided with the groove (213) and a first sliding portion (2112) formed by extending outwardly from one end of the first clamping portion away from the second clamping member; the second clamping member comprises a second clamping portion (2121) provided with the groove (213) and a second sliding portion (2122) formed by extending outwardly from one end of the second clamping portion away from the first clamping member; the first sliding portion and the second sliding portion are both adapted to be connected to the workbench (1) via a guide rail-slider structure (12).

5. The stator and motor housing assembly device according to claim 4, characterized in that: The top end of the first clamping portion is recessed inwardly to form a plurality of positioning grooves (2113) located on both sides of the groove (213), and the top end of the second clamping portion is protruded outwardly to form a plurality of positioning portions (2123) corresponding one-to-one to the positioning grooves (2113).

6. The stator and motor housing assembly device according to claim 5, characterized in that: Positioning blocks (13) fixedly connected to the workbench (1) and matched with the second clamping portion are provided on both sides of the first clamping member for positioning the second clamping member in a sliding direction.

7. An assembly device for a stator and a motor housing according to any one of claims 3 to 6, characterized in that: The workbench (1) is provided with a frame (14), and the frame is provided with position sensors (141) corresponding one-to-one to the first clamping member (211) and the second clamping member (212), and used for detecting and identifying the position states of the first clamping member and the second clamping member.

8. The stator and motor housing assembly device according to claim 7, characterized in that: The support seat (11) is located below the clamping cavity (23) and is fixedly connected to the workbench, the pressing plate (31) is located above the clamping cavity (23) and is movably connected to the frame, and the second driving mechanism (32) is used to drive the pressing plate to approach the support seat (11) and move away from the support seat along the axis direction of the clamping cavity.

9. The stator and motor housing assembly device according to claim 8, characterized in that: The pressing mechanism also includes a mounting plate (33) slidably connected to the frame along a direction perpendicular to the axis of the clamping cavity and a third driving mechanism (34) for driving the mounting plate to slide relative to the frame, the mounting plate being provided with a slot hole (331), the second driving mechanism being mounted on the mounting plate and having an output end passing through the slot hole and fixedly connected to the pressing plate.

10. The stator and motor housing assembly device according to claim 9, characterized in that: A side of the support seat (11) close to the clamping cavity (23) is recessed inwards to form a mounting groove (111).

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