Efficient press-fitting device for permanent magnet motor stator

Abstract

An efficient press-fitting device for a permanent magnet motor stator comprises a connecting mold frame, an upper pressing head is arranged on the connecting mold frame, a tool lower body is arranged below the upper pressing head, a pushing module is arranged below the tool lower body, and the upper pressing head comprises a machine shell upper positioning seat; a conical guide rod is arranged at the lower end of the shell upper positioning seat; the tool lower body comprises a press-fitting module located below the machine shell upper positioning base, an inner cavity is formed in the upper end of the press-fitting module, guide through holes are formed in the side wall of the inner cavity, magnetic steel sliding blocks are slidably connected into the guide through holes, and each magnetic steel sliding block is provided with a transverse push rod and a strong magnetic block. The outer side of the tool lower body is provided with a magnetic steel positioning protection piece and a guide sliding groove. The periphery of the bottom of the press-fitting module is provided with a machine shell lower positioning base. And a fixed sheet push block is arranged on the push module. Magnetic attraction is matched with the sliding block to press the magnetic steel, positioning is accurate, and press-fitting efficiency is high. The magnetic steel fixing piece is limited through the guide sliding groove, and the assembling precision of the magnetic steel and the magnetic steel fixing piece is guaranteed. The lower tool frame module is used for centralizing the machine shell, and the positioning stability of the machine shell is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of permanent magnet brushed DC motors, and particularly relates to an efficient press-fitting device for a permanent magnet motor stator. Background Technique

[0002] The permanent magnet brushed DC motor is a motor widely used in multiple fields such as automobiles and industrial equipment, and has the advantages of simple structure, low processing and assembly costs, and reliable operation.

[0003] With the continuous development of the permanent magnet brushed DC motor industry, the market competition has been intensifying. Optimizing the production and processing technology, reducing the manufacturing cost of the permanent magnet brushed DC motor, and increasing the service performance of the permanent magnet brushed DC motor have become the focus of attention of current production enterprises.

[0004] The stator of the permanent magnet brushed DC motor mainly consists of a housing, a magnetic steel, and a magnetic steel fixing part. At present, the mainstream production process in the industry is the vertical open press-fitting of the housing, the magnetic steel, and the magnetic steel fixing part, and the magnetic steel and the magnetic steel fixing part are vertically pressed in. This process has a certain probability of causing the magnetic steel after being pressed in not to fit tightly with the inner wall of the housing, resulting in the magnetic steel being non-concentric after installation; in addition, the magnetic steel fixing part also has a certain probability of deviation; at the same time, due to the hard contact between the magnetic steel and the housing in some motor structures, resonance will occur between the housing and the magnetic steel at a certain frequency, thereby causing the motor to vibrate; to solve such problems, the magnetic steel and the magnetic steel fixing part mostly need to be press-fitted separately, and uniform silicone is applied to the contact part between the magnetic steel and the housing. This operation requires a lot of personnel and takes a long time, and cannot meet the needs of mass production.

[0005] Therefore, aiming at the deficiencies of the existing technology, the utility model designs an efficient press-fitting device for a permanent magnet motor stator to solve the above problems.

[0006] It should be noted that the above introduction of the technical background is only for the convenience of clearly and completely explaining the technical solution of the utility model and facilitating the understanding of those skilled in the art. It cannot be considered that the above content is well-known to those skilled in the art just because these contents are described in the background technology of the utility model. Content of the Utility Model

[0007] The stator of the permanent magnet brushed DC motor consists of a housing, a magnetic steel, and a magnetic steel fixing part.

[0008] To overcome the above deficiencies in the existing technology, the purpose of the utility model is to provide an efficient press-fitting device for a permanent magnet motor stator, which is used for the assembly of the stator of the permanent magnet brushed DC motor, including a connecting die holder. An upper pressure head is arranged on the connecting die holder, a tooling lower body is arranged below the upper pressure head, and a pushing module is arranged below the tooling lower body, wherein:

[0009] The upper pressure head includes a positioning seat on the machine housing for positioning and pressing the top of the machine housing; a conical guide rod is provided at the lower end of the positioning seat on the machine housing for pushing the magnet slider to move outward along the guiding through hole, and further pushing the magnet to fit against the inner wall of the machine housing.

[0010] The lower body of the tooling includes a pressing module located below the positioning seat on the machine housing. An inner cavity corresponding to the conical guide rod is provided at the upper end of the pressing module. Symmetrically arranged guiding through holes are provided on the side wall of the inner cavity. Magnet sliders are slidably connected in the guiding through holes. A transverse push rod is provided on the side of the magnet slider close to the inner cavity, and a strong magnet block is provided on the outer side surface of the magnet slider; a magnet positioning and protecting piece is provided on the outer side of the lower body of the tooling. The magnet positioning and protecting piece cooperates with the strong magnet block to position and place the magnet, improving the positioning accuracy during magnet pressing; a guiding chute is provided on the outer side of the lower body of the tooling below the magnet positioning and protecting piece. A positioning seat under the machine housing is provided on the outer periphery of the bottom of the pressing module. The positioning seat under the machine housing cooperates with it on the outer periphery of the guiding chute to limit the magnet fixing piece in the guiding chute, so that the magnet fixing piece can only slide up and down along the guiding chute during pressing, improving the pressing positioning accuracy;

[0011] A fixed piece push block corresponding to the guiding chute is provided on the pushing module. During pressing, the fixed piece push block is inserted into the guiding chute to push the magnet fixing piece into the machine housing to complete positioning and clamping with the magnet.

[0012] The preferred technical solution is: The connecting die carrier includes a lower bottom plate. Guide columns are provided on the lower bottom plate. The upper ends of the guide columns are slidably connected with a pressing plate. Guide rods are provided on the lower bottom plate. The upper ends of the guide rods are connected with an upper bottom plate. A bearing spring is provided between the lower bottom plate and the upper bottom plate; the upper pressure head is connected with the pressing plate, the lower body of the tooling is connected with the upper bottom plate, and the pushing module is connected with the lower bottom plate.

[0013] The preferred technical solution is: Two groups of lower tooling frame modules are provided on the upper bottom plate. The two groups of lower tooling frame modules are arranged oppositely on both sides of the lower body of the tooling. A protecting plate for positioning the stator housing of the permanent magnet brush DC motor is provided on the lower tooling frame module.

[0014] The preferred technical solution is: Spring guide rods are provided on the upper bottom plate. Spring sleeves corresponding to the spring guide rods are provided on the lower bottom plate. The bearing spring is arranged in the spring sleeve, and the upper end of the bearing spring is sleeved on the outer periphery of the spring guide rod.

[0015] The preferred technical solution is: The positioning seat on the machine housing includes a positioning seat body on the machine housing. An upper connecting head cover plate is provided at the upper end of the positioning seat body on the machine housing. A positioning hole is provided on the positioning seat body; the outer periphery of the conical guide rod is slidably connected with the inner wall of the positioning hole. A limiting snap ring is provided at the rear end of the conical guide rod. A buffer spring is provided between the rear end of the conical guide rod and the upper connecting head cover plate to increase the contact buffer between the conical guide rod and the transverse push rod and avoid damage to the contact end.

[0016] The preferred technical solution is as follows: rollers are sleeved on the horizontal push rods, and the horizontal push rods are connected by a return spring to reduce the friction force on the contact surface with the conical guide rod and avoid damage to the contact surface.

[0017] The preferred technical solution is as follows: a guiding cover plate is provided at the top of the press-fitting module, and a press-fitting guiding hole is provided on the guiding cover plate to improve the movement stability of the conical guide rod.

[0018] The preferred technical solution is as follows: a housing limit block is provided on the lower positioning seat of the housing to improve the positioning accuracy of the housing.

[0019] In summary, the high-efficiency press-fitting device for the stator of a permanent magnet motor provided by the present utility model has the following advantages compared with the prior art:

[0020] 1) The magnetic steel is press-fitted by using magnetic attraction in cooperation with a slider, with accurate positioning and high press-fitting efficiency.

[0021] 2) The press-fitting movement of the magnetic steel fixing part is limited by using a guiding sliding groove, ensuring the assembly accuracy between the magnetic steel and the magnetic steel fixing part.

[0022] 3) The lower tooling frame module is used to straighten the housing, improving the positioning stability of the housing and thus improving the press-fitting accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a structural schematic diagram of a high-efficiency press-fitting device for the stator of a permanent magnet motor of the present utility model;

[0024] Figure 2 is an operation state schematic diagram of a high-efficiency press-fitting device for the stator of a permanent magnet motor of the present utility model;

[0025] Figure 3 is a structural schematic diagram of the upper pressing head in the present utility model;

[0026] Figure 4 is a structural schematic diagram of the lower body of the tooling in the present utility model;

[0027] Figure 5 is a structural schematic diagram of the pushing module in the present utility model;

[0028] Figure 6 is a structural schematic diagram of the stator of a permanent magnet motor in the present utility model.

[0029] In the above drawings, 100 is the connecting die set; 101 is the lower base plate; 101a is the spring sleeve; 102 is the guide post; 103 is the pressure plate; 104 is the guide rod; 105 is the upper base plate; 105a is the spring guide rod; 106 is the bearing spring; 1 is the upper punch; 11 is the upper positioning seat on the machine shell; 11a is the main body of the upper positioning seat on the machine shell; 11b is the upper connection head cover plate; 11c is the positioning hole; 12 is the conical guide rod; 12a is the limit snap ring; 12b is the buffer spring; 2 is the lower body of the tooling; 21 is the press-fitting module; 22 is the inner cavity; 23 is the guide through hole; 24 is the magnet slider; 24a is the transverse push rod; 24b is the strong magnet block; 24c is the roller; 24d is the return spring; 25 is the magnet positioning protection sheet; 26 is the guide chute; 27 is the lower positioning seat on the machine shell; 27a is the machine shell limit block; 28 is the lower tooling frame module; 28a is the guard plate; 29 is the guide cover plate; 29a is the press-fitting guide hole; 3 is the pushing module; 31 is the fixed piece push block; 41 is the machine shell; 42 is the magnet; 43 is the magnet fixing piece. Detailed implementation mode

[0030] The following specific embodiments illustrate the implementation mode of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0031] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is 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 orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0032] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium. It can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0033] Embodiment:

[0034] As Figure 1 and Figure 2 shown, the utility model discloses an efficient press-fitting device for a permanent magnet motor stator, which includes a connecting die carrier 100. A upper pressure head 1 is arranged on the connecting die carrier 100. A tooling lower body 2 is arranged below the upper pressure head 1. A pushing module 3 is arranged below the tooling lower body 2. The main components of the above utility model will be specifically described below:

[0035] As Figure 1 、 Figure 3 and Figure 4 shown, the connecting die carrier 100 includes a lower bottom plate 101. Guide columns 102 are arranged on the lower bottom plate 101. A pressing plate 103 is slidably connected to the upper ends of the guide columns 102. Guide rods 104 are arranged on the lower bottom plate 101. An upper bottom plate 105 is connected to the upper ends of the guide rods 104. A bearing spring 106 is arranged between the lower bottom plate 101 and the upper bottom plate 105. The upper pressure head 1 is connected to the pressing plate 103. The tooling lower body 2 is connected to the upper bottom plate 105. The pushing module 3 is connected to the lower bottom plate 101. Two groups of lower tooling frame modules 28 are arranged on the upper bottom plate 105. The two groups of lower tooling frame modules 28 are oppositely arranged on both sides of the tooling lower body 2. A guard plate 28a for positioning the stator housing of the permanent magnet brushed DC motor is arranged on the lower tooling frame module 28. A spring guide rod 105a is arranged on the upper bottom plate 105. A spring sleeve 101a corresponding to the spring guide rod 105a is arranged on the lower bottom plate 101. The bearing spring 106 is arranged in the spring sleeve 101a. The upper end of the bearing spring 106 is sleeved on the outer periphery of the spring guide rod 105a.

[0036] As Figure 1 and Figure 3 shown, the upper pressure head 1 includes a housing upper positioning seat 11. A tapered guide rod 12 is arranged at the lower end of the housing upper positioning seat 11. The housing upper positioning seat 11 includes a housing upper positioning seat body 11a. An upper connection head cover plate 11b is arranged at the upper end of the housing upper positioning seat body 11a. A positioning hole 11c is arranged on the housing upper positioning seat body 11a. The outer periphery of the tapered guide rod 12 is slidably connected to the inner wall of the positioning hole 11c. A limit snap ring 12a is arranged at the rear end of the tapered guide rod 12. A buffer spring 12b is arranged between the rear end of the tapered guide rod 12 and the upper connection head cover plate 11b.

[0037] As Figure 1 、 Figure 3 、 Figure 4 and Figure 6As shown, the tool lower body 2 includes a press-fitting module 21 located below the upper positioning seat 11 of the housing, the upper end of the press-fitting module 21 is provided with an inner cavity 22 corresponding to the tapered guide rod 12, the top of the press-fitting module 21 is provided with a guide cover plate 29, the guide cover plate 29 is provided with a press-fitting guide hole 29a, the tapered guide rod 12 is slidably connected to the inner wall of the press-fitting guide hole 29a; the side walls of the inner cavity 22 are provided with mutually symmetrical guide through holes 23, and the guide through holes 23 are all slidably connected with a magnetic steel slider 24, and the magnetic steel slider 24 is close to the inner cavity 2 2 is provided with a transverse push rod 24a on one side, and a strong magnetic block 24b is provided on the outer side of the magnetic steel slider 24; a roller 24c is sleeved on the transverse push rod 24a, and the transverse push rods 24a are connected by a reset spring 24d; a magnetic steel positioning guard sheet 25 is provided on the outer side of the tooling lower body 2, and a guide groove 26 is provided on the outer side of the tooling lower body 2 below the magnetic steel positioning guard sheet 25; a casing lower positioning seat 27 is provided on the outer periphery of the bottom of the press-fitting module 21, and a casing limit block 27a is provided on the casing lower positioning seat 27 to limit the rotation of the casing 41.

[0038] like Figure 1 and Figure 5 As shown, the pushing module 3 is provided with a fixed plate pushing block 31 which is arranged corresponding to the guide sliding groove 26 .

[0039] refer to Figures 1 to 6 As shown, the principle and implementation method of the utility model are as follows:

[0040] Before press-fitting, the magnetic steel fixing sheet 43 is inserted into the guide slot 26 and the outer casing lower positioning seat 27 is used to restrict the magnetic steel fixing sheet 43 in the guide slot 26; the magnetic steel 42 is placed on the outer periphery of the press-fitting module 21, and its two sides are clamped and positioned by the magnetic steel positioning guard sheets 25, and fixed by adsorption by the strong magnetic block 24b; finally, the casing 41 is placed on the casing lower positioning seat 27, the bottom of the casing 41 is clamped with the casing limit block 27a, and the outer periphery of the casing 41 is straightened and positioned by the guard plate 28a.

[0041] During press-fitting, the upper press head 1 moves downward, and the front end of the conical guide rod 12 gradually inserts between the two sets of rollers 24c. During this process, the two sets of rollers 24c and the two sets of transverse push rods 24a are squeezed toward the center of the inner cavity 22 under the action of the return spring 24d. After the conical guide rod 12 is subjected to the squeezing force, it compresses the buffer spring 12b upward. As the upper press head 1 moves downward, the elastic force of the buffer spring 12b gradually increases; when the elastic force of the buffer spring 12b is greater than the upward squeezing force of the two sets of rollers 24c, the conical guide rod 12 squeezes into the two sets of rollers 24c, and pushes the two sets of magnet sliders 24 to slide radially through the guiding through holes 23 to expand and press against the inner wall of the housing 41; when the positioning seat body 11a on the housing contacts the upper end of the housing 41, under its action, the housing 41 together with the upper bottom plate 105 moves downward. During this process, the fixed piece push block 31 pushes the magnet fixing member 43 to slide into the housing 41 along the guiding chute 26, and finally completes the snap-fitting and fixing of the magnet fixing member 43 and the magnet 42 in the housing 41.

[0042] In summary, a high-efficiency press-fitting device for a permanent magnet motor stator disclosed by the present utility model has the advantages of simple structure, convenient operation, and high press-fitting accuracy, and can be well adapted to pneumatic, hydraulic equipment or servo press equipment. It can be compatible with the production operations requiring magnet gluing, reducing the waste of glue and the labor cost.

[0043] The above embodiments provided by the present utility model only exemplarily illustrate the principles and effects of the present utility model, rather than being used to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. A permanent magnet motor stator high-efficiency press-fit device, used for assembling a permanent magnet brushed DC motor stator, comprising a connecting mold frame (100), characterized in that: The connecting mold frame (100) is provided with an upper pressing head (1), a tool lower body (2) is provided below the upper pressing head (1), and a pushing module (3) is provided below the tool lower body (2), wherein: The upper pressure head (1) comprises a casing upper positioning seat (11), and a conical guide rod (12) is provided at the lower end of the casing upper positioning seat (11); The tool lower body (2) comprises a press-fitting module (21) located below the casing upper positioning seat (11); an inner cavity (22) corresponding to the conical guide rod (12) is provided at the upper end of the press-fitting module (21); mutually symmetrical guide through holes (23) are provided at the side walls of the inner cavity (22); magnetic steel sliders (24) are slidably connected in the guide through holes (23); a lateral push rod (24a) is provided on the side of the magnetic steel slider (24) close to the inner cavity (22); a strong magnetic block (24b) is provided on the outer side of the magnetic steel slider (24); a magnetic steel positioning guard sheet (25) is provided on the outer side of the tool lower body (2); a guide slot (26) is provided on the lower side of the magnetic steel positioning guard sheet (25) and on the outer side of the tool lower body (2); and a casing lower positioning seat (27) is provided on the outer periphery of the bottom of the press-fitting module (21); The pushing module (3) is provided with a fixed plate pushing block (31) arranged corresponding to the guide sliding groove (26).

2. The high-efficiency press-fitting device for a permanent magnet motor stator according to claim 1 is characterized in that: The connecting mold frame (100) comprises a lower base plate (101), a guide column (102) is provided on the lower base plate (101), a pressure plate (103) is slidably connected to the upper end of the guide column (102), a guide rod (104) is provided on the lower base plate (101), an upper end of the guide rod (104) is connected to the upper base plate (105), and a pressure spring (106) is provided between the lower base plate (101) and the upper base plate (105); the upper pressure head (1) is connected to the pressure plate (103), the tool lower body (2) is connected to the upper base plate (105), and the pushing module (3) is connected to the lower base plate (101).

3. The high-efficiency press-fitting device for a permanent magnet motor stator according to claim 2 is characterized in that: Two groups of lower tooling frame modules (28) are provided on the upper base plate (105), the two groups of lower tooling frame modules (28) are arranged opposite to each other on both sides of the tooling lower body (2), and a guard plate (28a) for positioning a stator housing of the permanent magnet brushed DC motor is provided on the lower tooling frame module (28).

4. The high-efficiency press-fitting device for a permanent magnet motor stator according to claim 2 is characterized in that: A spring guide rod (105a) is provided on the upper base plate (105), a spring sleeve (101a) corresponding to the spring guide rod (105a) is provided on the lower base plate (101), the pressure-bearing spring (106) is arranged in the spring sleeve (101a), and the upper end of the pressure-bearing spring (106) is sleeved on the outer periphery of the spring guide rod (105a).

5. The high-efficiency press-fitting device for a permanent magnet motor stator according to claim 1 is characterized in that: The casing upper positioning seat (11) comprises a casing upper positioning seat body (11a), an upper joint cover plate (11b) is provided at the upper end of the casing upper positioning seat body (11a), and a positioning hole (11c) is provided on the casing upper positioning seat body (11a); the outer periphery of the conical guide rod (12) is slidably connected to the inner wall of the positioning hole (11c), a limiting clamping ring (12a) is provided at the rear end of the conical guide rod (12), and a buffer spring (12b) is provided between the rear end of the conical guide rod (12) and the upper joint cover plate (11b).

6. The high-efficiency press-fitting device for a permanent magnet motor stator according to claim 1 is characterized in that: A roller (24c) is sleeved on the transverse push rod (24a), and the transverse push rods (24a) are connected via a return spring (24d).

7. The high-efficiency press-fitting device for a permanent magnet motor stator according to claim 1 is characterized in that: A guide cover plate (29) is provided on the top of the press-fitting module (21), and a press-fitting guide hole (29a) is provided on the guide cover plate (29).

8. The high-efficiency press-fitting device for a permanent magnet motor stator according to claim 1, characterized in that: A casing limiting block (27a) is provided on the casing lower positioning seat (27).

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