Small inner rotor motor stator magnetic steel positioning and assembling device

Abstract

The utility model discloses a small-sized inner rotor motor stator magnetic steel positioning and assembling device, and solves the problem that in the prior art, magnetic steel and a stator are not tightly attached, so that the bonding effect is poor through glue. The utility model provides a small inner rotor motor stator magnetic steel positioning and assembling device, which comprises a base and a tight supporting assembly, a positioning boss is arranged on the base, a stator is positioned by the positioning boss, magnetic steel and the tight supporting assembly are arranged in the stator, the tight supporting assembly comprises a rotating shaft, a wedge block and a tight supporting block, and the wedge block and the tight supporting block are arranged on the rotating shaft. The rotating shaft comprises a transmission part and a stopping part, the stopping part is stopped above the tight supporting block, the wedge block is installed on the transmission part, movement of the transmission part drives the wedge block to move axially, a sliding groove is obliquely formed in one of the wedge block and the tight supporting block, a sliding block sliding in the sliding groove is arranged on the other one of the wedge block and the tight supporting block, and the wedge block and the tight supporting block are arranged in the sliding groove. The wedge block and the tight supporting block slide relatively so that the tight supporting block can move outwards to abut against the magnetic steel.

Description

Technical Field

[0001] The utility model relates to the technical field of motor assembly, in particular to a small inner rotor motor stator magnetic steel positioning assembly device. Background Art

[0002] The stator of a small brushed motor is a combination of a steel tubular stator housing and two permanent magnets. The magnets need to be positioned and fixed on the stator housing with glue.

[0003] At present, the workshop uses the suction force of the magnet itself to hold the stator shell, and then uses a positioning strip to fix the position of the magnet. Since the suction force of the magnet is not strong enough, the magnet may not fit tightly enough with the stator shell, causing the magnet to detach during the glue curing process. Furthermore, the glue curing strength may be insufficient, resulting in the detachment of the magnet during the subsequent installation of other components (such as the rotor) or use. Summary of the invention

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and propose a small inner rotor motor stator magnet positioning assembly device to solve the problem in the prior art that the magnet and the stator are not closely fitted together, resulting in poor bonding effect using glue.

[0005] In order to achieve the above technical objectives, the utility model proposes a small inner rotor motor stator magnet positioning assembly device, including a base and a clamping assembly, the base is provided with a positioning boss, the positioning boss positions the stator, the magnet and the clamping assembly are placed in the stator, the clamping assembly includes a rotating shaft, a wedge block and a clamping block, the rotating shaft includes a transmission part and a stop part, the stop part stops above the clamping block, the wedge block is installed on the transmission part, the movement of the transmission part drives the wedge block to move axially, one of the wedge block and the clamping block is obliquely provided with a slide groove, and the other is provided with a slider sliding in the slide groove, the wedge block and the clamping block slide relative to each other so that the upward movement of the wedge block pushes the clamping block to move outward and abut against the magnet.

[0006] Preferably, the support block includes a stop block portion and a sliding portion, the inclined groove or the sliding block is arranged on the sliding portion, the stop block portion abuts against the magnetic steel, and the stop block portion and the sliding portion are separately arranged and fixedly connected by screws.

[0007] Preferably, a positioning frame is further provided on the base, and the positioning frame is placed in the stator. Two magnetic steels are provided, and one end of the two magnetic steels is respectively abutted against the left and right ends of the positioning frame.

[0008] Preferably, a positioning groove is provided on the positioning frame, and a positioning rib is provided on the stator, and the positioning rib is positioned in the positioning groove to position the stator on the base.

[0009] Preferably, the tightening assembly further comprises a positioning member, wherein the positioning member is fixedly connected to the wedge block, and two magnetic steels are provided, and one end of the two magnetic steels respectively abuts against the left and right ends of the positioning member.

[0010] Preferably, a clamping groove extending along the extending direction of the sliding groove is provided on the side wall of the sliding groove, and a flange portion is protrudingly provided on the side surface of the sliding block, and the flange portion slides in the clamping groove.

[0011] Preferably, the transmission part is a screw.

[0012] The tightening assembly further includes a nut, a limiting groove is provided below the wedge block, the nut is limited in the limiting groove to limit rotation, the nut is threadedly connected to the screw rod, and the rotation of the screw rod drives the first nut to move axially;

[0013] or,

[0014] The wedge block is provided with a threaded hole, the threaded hole is threadedly connected to the screw rod, and the rotation of the screw rod drives the wedge block to move axially.

[0015] Preferably, a spring is pre-pressed between the tightening block and the wedge block, and the spring pushes the tightening block to move in a direction away from the wedge block.

[0016] Preferably, the tightening block is provided with a first receiving groove for receiving part of the spring, and the wedge block is provided with a second receiving groove for receiving part of the spring, one end of the spring abuts against the groove wall of the first receiving groove, and the other end abuts against the groove wall of the second receiving groove.

[0017] Preferably, a retaining spring groove is provided on one end of the screw rod facing away from the wedge block, and a retaining spring is installed in the retaining spring groove.

[0018] After adopting the above technical solution, the utility model has the following beneficial effects.

[0019] 1. The utility model proposes a small inner rotor motor stator magnet positioning assembly device, including a base and a clamping assembly, the base is provided with a positioning boss, the positioning boss positions the stator, the magnet and the clamping assembly are placed in the stator, the clamping assembly includes a rotating shaft, a wedge block and a clamping block, the rotating shaft includes a transmission part and a stopper, the stopper stops above the clamping block, the wedge block is installed on the transmission part, the movement of the transmission part drives the wedge block to move axially, one of the wedge block and the clamping block is obliquely provided with a slide groove, and the other is provided with a slider sliding in the slide groove, the relative sliding of the wedge block and the clamping block makes the upward movement of the wedge block push the clamping block to move outward and abut against the magnet. In this way, the movement of the transmission part makes the clamping block move outward and abut against the magnet, thereby pressing the magnet against the inner wall of the stator, and in the process of bonding the magnet and the stator by glue, the magnet can be well attached to the inner wall of the stator, thereby ensuring the bonding effect between the magnet and the stator.

[0020] 2. The clamping block includes a stopper portion and a sliding portion, an inclined groove or a slider is provided on the sliding portion, the stopper portion abuts against the magnetic steel, and the stopper portion and the sliding portion are separately provided and fixedly connected by screws. Due to the existence of the inclined slide groove, or the inclined slider matched with the inclined slide groove, and the existence of the arc-shaped contact surface on the outside of the clamping block, when processing multiple processing surfaces, the clamping block needs to rely on customized backing and clamps for positioning, which makes the processing difficulty of the clamping block very large when it is an integrated structure, and it is difficult to ensure the processing accuracy by relying on the arc-shaped surface for positioning. At the same time, the additional backing and clamps also generate additional costs. Therefore, by setting the clamping block separately, the processing difficulty of the clamping block can be simplified, the processing accuracy can be improved, and the processing cost can be reduced; at the same time, due to the separate setting of the clamping block, motors of different specifications and sizes can use different stopper portions, while the rotating shaft, wedge block and sliding portion can be universal, thereby saving the cost of the clamping assembly.

[0021] 3. A positioning frame is also provided on the base, and the positioning frame is placed in the stator. Two magnetic steels are provided, and one end of the two magnetic steels is respectively abutted against the left and right ends of the positioning frame. Such a setting can improve the installation accuracy of the magnetic steel.

[0022] 4. A positioning groove is provided on the positioning frame, and a positioning rib is provided on the stator. The positioning rib is positioned in the positioning groove to position the stator on the base. By providing the positioning groove on the positioning frame, the relative position between the magnetic steel bonded to the stator and the positioning rib on the stator is determined, ensuring that the magnetic steel bonded to the inner wall of the stator is in the correct position, thereby ensuring that the motor can be used normally after assembly.

[0023] 5. The tightening assembly also includes a positioning member, which is fixedly connected to the wedge block, and two magnetic steels are provided, and one end of the two magnetic steels is respectively abutted against the left and right ends of the positioning member. Such an arrangement can improve the installation accuracy of the magnetic steel.

[0024] 6. A slot extending in the direction in which the slide groove extends is provided on the side wall of the slide groove, and a flange portion is provided on the side of the slider, and the flange portion slides in the slot. Through the cooperation of the slot and the flange portion, the slider and the slide groove can only move in the direction in which the slide groove extends. Therefore, there is no need to set other guide structures in the tightening assembly to guide the moving direction of the tightening block, thereby simplifying the structure of the tightening assembly and reducing the cost of the tightening assembly.

[0025] 7. The transmission part is a screw rod, and the wedge block includes a wedge block body and a nut. A limit groove is provided below the wedge block body, and the nut is limited in the limit groove to limit rotation. The nut is threadedly connected to the screw rod, and the rotation of the screw rod drives the first nut to move axially; or, a threaded hole is provided on the wedge block, and the threaded hole is threadedly connected to the screw rod, and the rotation of the screw rod drives the wedge block to move axially. The upward movement of the wedge block pushes the tightening block to move outward through the cooperation of the screw rod and the threaded hole or the nut. The structure is simple and reliable, which can simplify the design of the tightening assembly and reduce the production cost of the tightening assembly.

[0026] 8. A spring is pre-loaded between the tightening block and the wedge block, and the spring pushes the tightening block to move in a direction away from the wedge block. Through the pre-loaded spring, the spring pushes the tightening block to move in a direction away from the wedge block, so as to support the tightening block between the stopper and the wedge block, thereby ensuring the integrity of the tightening assembly. The tightening block and the wedge block will not separate during transportation and movement of the tightening assembly. The assembler can easily take and place the tightening assembly in the stator, which improves the convenience of operation of the tightening assembly.

[0027] 9. The tension block is provided with a first receiving groove for accommodating part of the spring, and the wedge block is provided with a second receiving groove for accommodating part of the spring. One end of the spring abuts against the groove wall of the first receiving groove, and the other end abuts against the groove wall of the second receiving groove. Since the stator of the small inner rotor motor is small, the spring is accommodated by the first receiving groove and the second receiving groove, thereby avoiding the spring from occupying too much space inside the tension assembly. The wall thickness of the tension block and the wedge block does not need to be designed too thin due to the excessive space occupied by the spring, so that the tension block and the wedge block can have sufficient wall thickness to have sufficient structural strength, thereby completing the positioning and assembly work of the tension assembly well.

[0028] 10. A retaining spring groove is provided on the end of the screw away from the wedge block, and a retaining spring is installed in the retaining spring groove. With this arrangement, when the operator rotates the shaft excessively, the retaining spring stops below the nut or the threaded portion, thereby preventing the wedge block from falling off the screw, further improving the reliability of the tightening assembly.

[0029] These features and advantages of the present invention will be disclosed in detail in the following specific implementation manners and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of a base and a tightening assembly in an embodiment of the utility model;

[0031] Figure 2 This is a schematic diagram of the positioning and assembly of the stator, magnetic steel, base and support assembly in the embodiment of the utility model;

[0032] Figure 3 It is a cross-sectional view of the positioning and assembly of the stator, magnetic steel, base and support assembly in the embodiment of the utility model;

[0033] Figure 4 This is an exploded view of the tightening assembly in the embodiment of the utility model;

[0034] Figure 5 Another cross-sectional view of the positioning and assembly of the stator, magnetic steel, base and support assembly in the embodiment of the utility model;

[0035] Figure 6 A cross-sectional view of a tightening assembly in an embodiment of the utility model;

[0036] Reference numerals:

[0037] 100, base, 110, positioning boss, 120, positioning frame, 121, positioning groove;

[0038] 200, tightening assembly, 210, rotating shaft, 211, transmission part, 212, stopping part, 2121, stopping surface, 213, operating rod, 220, wedge block, 221, sliding block, 2211, flange part, 222, limiting groove, 223, second accommodating groove, 230, tightening block, 231, sliding groove, 2311, clamping groove, 232, abutting block part, 233, sliding part, 234, first accommodating groove, 240, positioning member, 241, positioning part, 242, connecting part, 243, fixing part, 250, spring, 260, nut;

[0039] 300, stator, 301, positioning rib;

[0040] 400, Magnetic steel. DETAILED DESCRIPTION

[0041] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 understood as a limitation on the present invention.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" and "several" mean two or more, unless otherwise clearly defined.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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 or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] like Figures 1 to 6 As shown, a small inner rotor motor stator magnet positioning assembly device proposed in the embodiment of the utility model includes a base 100 and a clamping assembly 200. The base 100 is provided with a positioning boss 110, and the positioning boss 110 is used to position the stator 300 of the small inner rotor motor. The stator 300 is sleeved on the positioning boss 110, and the magnet 400 and the clamping assembly 200 are placed in the stator 300. The clamping assembly 200 includes a rotating shaft 210, a wedge block 220 and a clamping block 230. The rotating shaft 210 includes a transmission part 211 and a stopper 212. The stopper 212 stops above the clamping block 230, thereby limiting the upward movement of the clamping block 230. The wedge block 220 is installed on the transmission part 211, and the movement of the transmission part 211 drives the wedge block 220 to move axially up and down.

[0046] In this embodiment, a slider 221 is provided on the wedge block 220, and a slide groove 231 is obliquely provided on the tightening block 230. The slider 221 is placed in the slide groove 231 to slide, so that the wedge block 220 and the tightening block 230 can slide obliquely relative to the rotating shaft 210. The relative sliding of the two makes the upward movement of the wedge block 220 push the tightening block 230 to move outward and abut against the magnetic steel 400, thereby pressing the magnetic steel 400 against the inner wall of the stator 300.

[0047] In some other embodiments, the sliding block 221 may be disposed on the tightening block 230 , and the inclined sliding groove 231 may be disposed on the wedge block 220 .

[0048] The slide groove 231 is inclined from the rotation shaft 210 to the tightening block 230 from top to bottom, and the shape of the sliding block 221 is adapted to the slide groove 231 .

[0049] A stopping surface 2121 is disposed at the lower end of the stopping portion 212 , and the stopping surface 2121 stops the supporting block 230 .

[0050] In this embodiment, two magnets 400 are installed in the stator 300, and correspondingly, two tightening blocks 230 are provided, and the two tightening blocks 230 respectively press the two magnets 400 against the inner wall of the stator 300. The magnets 400 are arranged axially symmetrically in the stator 300, and the tightening blocks 230 are arranged axially symmetrically with the center of the rotating shaft 210.

[0051] The operator first positions the stator 300 on the base 100, applies glue to the back of the magnet 400 and then positions the magnet 400 in the stator 300, with the back of the magnet 400 in contact with the inner wall of the stator 300. Then, the clamping assembly 200 is placed in the stator 300, and the rotating shaft 210 is driven manually to move. Since the stopper 212 is stopped above the clamping block 230, the clamping block 230 is restricted by the stopper 212 and cannot move upward, so that the clamping block 230 moves outward to abut against the magnet 400, thereby pressing the magnet 400 against the inner wall of the stator 300. After the glue is completely cured and the clamping assembly 200 is removed, the magnet 400 is firmly bonded to the inner wall of the stator 300.

[0052] With such arrangement, during the process of bonding the magnet 400 and the stator 300 by glue, the magnet 400 can be well attached to the inner wall of the stator 300 , thereby ensuring the bonding effect between the magnet 400 and the stator 300 .

[0053] In this embodiment, the tightening block 230 preferably includes a stop block 232 and a sliding portion 233 . The stop block 232 abuts against the magnetic steel 400 . The stop block 232 and the sliding portion 233 are separately provided and fixedly connected by screws.

[0054] The outer side of the stop block 232 forms a contact surface with the magnetic steel 400 , and the contact surface is an arc-shaped surface adapted to the inner surface of the magnetic steel 400 .

[0055] Due to the existence of the inclined slide groove 231, or the inclined slider 221 that matches the inclined slide groove 231, and the existence of the arc-shaped contact surface on the outside of the clamping block 230, when multiple processed surfaces are processed by machining, the clamping block 230 needs to rely on customized backing and clamps for positioning, so that when the clamping block 230 is an integrated structure, it is very difficult to process and it is difficult to ensure the processing accuracy by relying on the arc-shaped surface for positioning. At the same time, the additional backing and clamps also generate additional costs. Therefore, by setting the clamping block 230 separately, the processing difficulty of the clamping block 230 can be simplified, the processing accuracy can be improved, and the processing cost can be reduced; at the same time, due to the separate setting of the clamping block 230, motors of different specifications and sizes can use different block parts 232, and the rotating shaft 210, wedge block 220 and sliding part 221 can be universal, thereby saving the cost of the clamping assembly 200.

[0056] In a preferred embodiment, a positioning frame 120 is vertically provided on the base 100. When the stator 300 is positioned on the positioning boss 110, the positioning frame 120 is placed in the stator 300, and one end of each of the two magnetic steels 400 abuts against the left and right sides of the positioning frame 120, thereby determining the bonding position of the magnetic steels 400. Before the operator places the tightening assembly 200 in the stator 300, the two magnetic steels 400 abut against the left and right sides of the positioning frame 120, respectively, so that the two magnetic steels 400 can be symmetrically bonded to the correct position of the inner wall of the stator 300, thereby improving the installation accuracy of the magnetic steels 400.

[0057] In another more preferred embodiment, a positioning groove 121 is provided on the positioning frame 120, and a positioning rib 301 is provided on the stator 300. The positioning rib 301 is positioned in the positioning groove 121 so that the stator 300 is positioned on the base 100. The positioning rib 301 is used to position the end cover installed on the small inner rotor motor. By providing the positioning groove 121 on the positioning frame 120, the relative position between the magnetic steel 400 bonded to the stator 300 and the positioning rib 301 on the stator 300 is determined, ensuring that the magnetic steel 400 bonded to the inner wall of the stator 300 is in the correct position, thereby ensuring that the motor can be used normally after assembly.

[0058] In another preferred embodiment, the tightening assembly 200 further includes a positioning member 240, which is fixedly connected to the wedge block 220, and the other ends of the two magnets 400 are respectively abutted against the two ends of the positioning member 240. Such a configuration can improve the installation accuracy of the magnets 400.

[0059] It should be noted that the two ends of the magnet 400 are respectively abutted against the positioning frame 120 and the positioning member 240 , so that the two magnets 400 can be symmetrically limited at the correct position of the inner wall of the stator 300 , thereby further improving the installation accuracy of the magnet 400 .

[0060] The positioning ribs 301 are arranged on the shell wall of the stator 300 and are integrally formed through a stamping process.

[0061] More preferably, in this embodiment, the positioning member 240 includes a positioning portion 241 , and outer walls on both sides of the lower end of the positioning portion 241 are gradually retracted from top to bottom, and two magnetic steels 400 are abutted against the left and right sides of the upper end of the positioning portion 241 .

[0062] The operator first positions the magnet 400 on the inner wall of the stator 300, and installs the clamping assembly 200 into the stator 300. Due to the inward-retracted outer wall of the lower end of the positioning portion 241, the clamping assembly 200 is easier to be installed into the stator 300. At the same time, when the reserved gap between the two magnets 400 is insufficient, the gradual installation of the clamping assembly 200 allows the positioning portion 241 to gradually push the magnet 400 away, thereby positioning the magnet 400 to the correct position.

[0063] More preferably, the positioning member 240 further includes a fixing portion 243 and a connecting portion 242, wherein the fixing portion 243 is fixedly connected to the wedge block 220 by screws, and the connecting portion 242 is connected between the positioning portion 241 and the fixing portion 243, and the connecting portion 242 is disposed below the wedge block 220. An accommodating space for accommodating at least part of the wedge block 220 is formed between the fixing portion 243 and the positioning portion 241, and part of the tightening block 230 is also accommodated in the accommodating space.

[0064] In order to simplify the structure of the tensioning assembly 200, in this embodiment, a clamping groove 2311 extending in the extending direction of the slide groove 231 is provided on the side wall of the slide groove 231, and a flange portion 2211 is convexly provided on the side of the slider 221, and the flange portion 2211 is placed in the clamping groove 2311 for sliding. Through the cooperation between the clamping groove 2311 and the flange portion 2211, the slider 221 and the slide groove 231 can only move in the extending direction of the slide groove 231, so that there is no need to set other guide structures for guiding the moving direction of the tensioning block 230 in the tensioning assembly 200, thereby simplifying the structure of the tensioning assembly 200 and reducing the cost of the tensioning assembly 200.

[0065] In another embodiment, the transmission part 211 is a screw rod, and the tightening assembly 200 further includes a nut 260. A limiting groove 222 is provided below the wedge block 220. The nut 260 is limited in rotation in the limiting groove 222. The nut 260 is threadedly connected to the screw rod. The rotation of the screw rod drives the nut 260 to move axially, and the upward movement of the nut 260 drives the wedge block 220 to move upward. The nut 260 moves downward, and the weight of the wedge block 220 causes it to move downward.

[0066] In some other embodiments, a threaded hole is provided on the wedge block 220, and the threaded hole is threadedly connected to the screw rod, and the rotation of the screw rod drives the wedge block 220 to move axially up and down.

[0067] The wedge block 220 moves upward and pushes the tightening block 230 to move outward by cooperating with the screw and the threaded hole or the nut 260. The structure is simple and reliable, which can simplify the design of the tightening assembly 200 and reduce the production cost of the tightening assembly 200.

[0068] The transmission part 211 is disposed below the stopper part 212 , and an operating rod 213 is protruded above the stopper part 212 . An operator applies force to the operating rod 213 to drive the stopper part 212 to rotate, thereby driving the transmission part 211 to rotate.

[0069] In a preferred embodiment, a spring 250 is pre-compressed between the tightening block 230 and the wedge block 220 , and the spring 250 pushes the tightening block 230 to move in a direction away from the wedge block 220 .

[0070] Due to the deadweight of the tightening block 230, the tightening assembly 200 will slide down along the wedge block 220 when not in operation, which may cause the tightening block 230 to separate from the tightening assembly 200 during transportation, thereby affecting the use of the assembler. The spring 250 with preload pushes the tightening block 230 to move in a direction away from the wedge block 220, so as to support the tightening block 230 between the stopper 212 and the wedge block 220, thereby ensuring the integrity of the tightening assembly 200. The tightening block 230 and the wedge block 220 will not separate during transportation and movement of the tightening assembly 200, and the assembler can easily take and place the tightening assembly 200 in the stator 300, thereby improving the convenience of operation of the tightening assembly 200.

[0071] More preferably, in this embodiment, the tightening block 230 is provided with a first accommodating groove 234 for accommodating part of the spring 250, and the wedge block 220 is provided with a second accommodating groove 223 for accommodating part of the spring 250, one end of the spring 250 abuts against the groove wall of the first accommodating groove 234, and the other end abuts against the groove wall of the second accommodating groove 223.

[0072] Since the stator 300 of the small inner rotor motor is relatively small, the spring 250 is accommodated by the first accommodating groove 234 and the second accommodating groove 223, thereby preventing the spring 250 from occupying too much space inside the clamping assembly 200. The wall thickness of the clamping block 230 and the wedge block 220 does not need to be designed to be too thin due to the excessive space occupied by the spring 250, so that the clamping block 230 and the wedge block 220 can have sufficient wall thickness to have sufficient structural strength, thereby completing the positioning and assembly work of the clamping assembly 200 well.

[0073] In some other more preferred embodiments, stop blocks are provided on the tightening block 230 and the wedge block 220, one of the stop blocks is provided with a guide column, and the other stop block is provided with a guide hole for the guide column to pass through, and the spring 250 is sleeved on the guide column, and the two ends of the spring 250 are respectively abutted against the two stop blocks.

[0074] In another preferred embodiment, one end of the slide groove 231 is closed, and the closed end of the slide groove 231 is stopped on the slider 221 to prevent the support block 230 from being separated from the wedge block 220 in a direction away from the stop portion 212 .

[0075] When the slide groove 231 is disposed on the tightening block 230 , the upper end of the slide groove 231 is closed; when the slide groove 231 is disposed on the wedge block 220 , the lower end of the slide groove 231 is closed.

[0076] In another preferred embodiment, a retaining spring groove is provided on one end of the screw rod which is away from the wedge block 220, and a retaining spring is installed in the retaining spring groove.

[0077] With such arrangement, when the operator excessively rotates the rotating shaft 210 , the retaining spring is stopped below the nut 260 or the threaded portion, thereby preventing the wedge block 220 from falling off the screw rod, further improving the reliability of the tightening assembly 200 .

[0078] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Those skilled in the art should understand that the utility model includes but is not limited to the contents described in the drawings and the above specific implementation. Any modification that does not deviate from the functional and structural principles of the utility model will be included in the scope of the claims.

Claims

1. A small inner rotor motor stator magnetic steel positioning and assembly device, characterized in that: It includes a base and a clamping assembly, the base is provided with a positioning boss, the positioning boss positions the stator, the magnetic steel and the clamping assembly are placed in the stator, the clamping assembly includes a rotating shaft, a wedge block and a clamping block, the rotating shaft includes a transmission part and a stop part, the stop part stops above the clamping block, the wedge block is installed on the transmission part, the movement of the transmission part drives the wedge block to move axially, one of the wedge block and the clamping block is obliquely provided with a slide groove, and the other is provided with a slider sliding in the slide groove, the wedge block and the clamping block slide relative to each other so that the upward movement of the wedge block pushes the clamping block to move outward and abut against the magnetic steel.

2. A small inner rotor motor stator magnetic steel positioning and assembly device as claimed in claim 1, characterized in that: The support block includes a stop block portion and a sliding portion, the slide groove or the slide block is arranged on the sliding portion, the stop block portion abuts against the magnetic steel, and the stop block portion and the sliding portion are separately arranged and fixedly connected by screws.

3. A small inner rotor motor stator magnetic steel positioning and assembly device as claimed in claim 1, characterized in that: The base is also provided with a positioning frame, and the positioning frame is placed in the stator. Two magnetic steels are provided, and one end of the two magnetic steels is respectively abutted against the left and right ends of the positioning frame.

4. A small inner rotor motor stator magnetic steel positioning and assembly device as claimed in claim 3, characterized in that: The positioning frame is provided with a positioning groove, and the stator is provided with a positioning rib, and the positioning rib is positioned in the positioning groove to position the stator on the base.

5. A small inner rotor motor stator magnetic steel positioning and assembly device as claimed in claim 1, characterized in that: The tightening assembly also includes a positioning piece, which is fixedly connected to the wedge block. Two magnetic steels are provided, and one end of the two magnetic steels is respectively abutted against the left and right ends of the positioning piece.

6. A small inner rotor motor stator magnetic steel positioning and assembly device as claimed in claim 1, characterized in that: A clamping groove extending along the extending direction of the sliding groove is provided on the side wall of the sliding groove, and a flange portion is convexly provided on the side surface of the sliding block, and the flange portion slides in the clamping groove.

7. A small inner rotor motor stator magnetic steel positioning and assembly device as claimed in claim 1, characterized in that: The transmission part is a screw. The tightening assembly further includes a nut, a limiting groove is provided below the wedge block, the nut is limited in the limiting groove to limit rotation, the nut is threadedly connected to the screw, and the rotation of the screw drives the nut to move axially; or, The wedge block is provided with a threaded hole, the threaded hole is threadedly connected to the screw rod, and the rotation of the screw rod drives the wedge block to move axially.

8. A small inner rotor motor stator magnetic steel positioning and assembly device as claimed in claim 7, characterized in that: A spring is pre-compressed between the tightening block and the wedge block, and the spring pushes the tightening block to move in a direction away from the wedge block.

9. A small inner rotor motor stator magnetic steel positioning and assembly device as claimed in claim 8, characterized in that: The tightening block is provided with a first receiving groove for receiving part of the spring, and the wedge block is provided with a second receiving groove for receiving part of the spring. One end of the spring abuts against the groove wall of the first receiving groove, and the other end abuts against the groove wall of the second receiving groove.

10. A small inner rotor motor stator magnetic steel positioning and assembly device according to any one of claims 7 to 9, characterized in that: A retaining spring groove is arranged on one end of the screw rod away from the wedge block, and a retaining spring is installed in the retaining spring groove.

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