CN218678759U - Assembling apparatus for stator end plate of brushless motor for electric tool - Google Patents

Abstract

The utility model relates to an equipment of stator end plate for brushless motor of electric tool, stator end plate include the end plate end wall and construct for the end plate that the card is close to and is engaged in stator core erects the wall, and equipment includes: -a stator core holding part configured to hold the stator core, -an end plate holding part configured to hold the stator end plate such that the end plate vertical walls are aligned with the tooth slots of the stator core, respectively; -an end plate compression part configured to receive the stator end plate in an open state and to press the end plate vertical wall inwards along a peripheral outer side of the end plate vertical wall in a closed state; an end plate fitting portion configured to move the stator end plate toward the stator core and guide a free end of an end plate vertical wall of the stator end plate into the tooth slot after the end plate compression portion completes compression of the stator end plate in the closed state. The utility model discloses an equipment can improve the packaging efficiency and the accuracy of stator end plate.

Description

Assembling apparatus for stator end plate of brushless motor for electric tool

Technical Field

The utility model relates to an equipment of stator end plate for electric tool's brushless motor.

Background

The market demand for existing electric tools equipped with brushless DCEC motors is increasing year by year. Concomitantly, the motor demand brought to the plant is also rising. In the assembly process of the brushless motor stator, the assembly of the end plate is completely realized by manual assembly; thus, the dependence of the factory on the skill of the staff is very high, and the work intensity of the staff is relatively high.

A method of assembling a stator end plate for a brushless motor of a power tool in the current state of the art, comprising the steps of: and connecting the end plate, the bottom end plate and the stator core, and manually embedding the end plate into a stator core slot.

First, the current process of manually assembling the end plates is inefficient. Each product needs to be assembled and connected with an end plate and a bottom end plate respectively; the assembling wall of the end plate is thinner, and the size of the assembling wall is close to the size of the inner diameter of the stator iron core slot. Secondly, consider that the end plate belongs to the injection molding, under the condition of the zero burr of unable avoidance, increaseed staff's the manual assembly degree of difficulty. Therefore, in the operation process, the staff needs to continuously shake the end plates left and right to slowly find a proper matching position and then install the end plates in place. In this way, the beat of the station is long, and the working efficiency is low; thirdly, during the assembly of the end plates, the relative position of the stator core is required to be determined by visual inspection before manual assembly. Under the condition of large-batch and repeated workload, a certain probability of error installation can occur, particularly under the condition of new staff. Manual assembly may also result in an out-of-position assembly. The relative angle is misplaced and assembled, which can affect the production of the subsequent process, thereby affecting the production quality and efficiency of the whole line.

SUMMERY OF THE UTILITY MODEL

According to the present invention, there is disclosed an assembly apparatus for a stator end plate of a brushless motor for an electric tool, the stator end plate comprising an end plate end wall configured to abut against a peripheral end face of a stator core; and an end plate vertical wall configured to be engaged in a tooth slot in the stator core for winding the coil and extending axially from the end wall of the end plate; the assembling apparatus includes: -a stator core holding part configured to hold the stator core, -an end plate holding part configured to hold the stator end plates such that end plate vertical walls of the stator end plates are aligned with tooth slots of the stator core, respectively; an end plate compression portion configured to receive the stator end plate held by the end plate holding portion in an open state and press the end plate vertical wall of the stator end plate inward along a peripheral outer side of the end plate vertical wall in a closed state; an end plate fitting portion configured to move the stator end plate toward the stator core and guide a free end of an end plate vertical wall of the stator end plate into the tooth slot after the end plate compression portion completes compression of the stator end plate in the closed state.

Further, the stator end plate is configured in a ring shape and the end plate compression portion includes movable members corresponding to the number of the end plate vertical walls and a retainer for movably retaining the movable members such that the movable members each move outward in the radial direction when the end plate compression portion is opened and the movable members respectively abut against the end plate vertical walls when the end plate compression portion is closed.

Further, the movable member is configured in a plate shape and includes a body and a protrusion, the body includes an abutment surface oriented radially inward in the circumferential direction and the protrusion protrudes radially inward from the abutment surface, the abutment surface is configured to abut against a radially outer side of the end plate vertical wall in a shape-fitting manner in a closed state of the end plate compression portion and the protrusion is configured to be interposed between adjacent two of the end plate vertical walls in the closed state.

Further, the thickness of the body is smaller than the height of the end plate vertical wall, so that the upper and lower surfaces of the movable member are separated by a distance from the free ends of the end plate end wall and the end plate vertical wall in the closed state of the end plate compression portion.

Further, the protruding portion is configured such that both side surfaces of the protruding portion in the circumferential direction abut the adjacent end plate vertical walls, respectively, in the closed state of the end plate compression portion.

Further, the assembling apparatus further includes a driving portion configured to drive radial movement of the movable member in the end plate compression portion and provide radially inward pressing of the end plate vertical wall.

Further, the assembling apparatus further includes an attitude adjusting portion configured to adjust an attitude and a position of the stator core in the stator core holding portion and/or the stator end plate in the end plate holding portion, respectively.

Further, the stator end plate and the stator core are also provided with a reference portion and the attitude adjustment portion is configured to determine the relative orientation between the stator end plate and the stator core by means of a camera recognition system.

Further, the assembling apparatus further includes a central compression portion concentrically disposed in the intermediate space of the end plate compression portion and configured to be received in the stator end plate held by the end plate holding portion in a contracted state and to press an inner side of the end plate vertical wall of the stator end plate in a radially outward direction in an expanded state, the contracted state being synchronized with the open state of the end plate compression portion and the expanded state being synchronized with the closed state of the end plate compression portion.

Further, the central compression portion includes a central movable portion and a central retainer supporting the central movable portion, the retainer being entirely built into the intermediate space of the end plate end wall and the central movable portion being configured to project radially outward from the retainer in the expanded state to abut against an inner side of the end plate vertical wall and to retract to the central retainer in the collapsed state.

With the adoption of the assembling equipment, the stator end plate and the stator core can be automatically assembled, so that the assembling efficiency is greatly improved. Further, the assembling equipment can automatically realize the position adjustment of the stator end plate and the stator core, so that accurate and efficient installation is ensured. The assembly apparatus as described above greatly simplifies the assembly process and reduces labor costs.

Drawings

Other notable features and advantages of the present invention derive from the following non-limiting description provided for illustrative purposes with reference to the following drawings, in which:

fig. 1 shows a separated view of a stator core, an upper end plate and a lower end plate of a motor;

fig. 2a shows a perspective view of an end plate compression part of an assembly device for a stator end plate according to an embodiment of the invention, wherein the end plate compression part is in an open state;

fig. 2b shows a perspective view of an end plate compression part of an assembly device for a stator end plate according to an embodiment of the invention, wherein the end plate compression part is in a closed state;

fig. 3a shows a top view of an end plate compression part of an assembly apparatus for a stator end plate according to an embodiment of the invention, wherein the end plate compression part is in an open state;

fig. 3b shows a top view of an end plate compression part of an assembly device for a stator end plate according to an embodiment of the invention, wherein the end plate compression part is in a closed state;

fig. 4 shows a cross-sectional view of an end plate compression section of an assembly device including a drive dial for driving a movable part according to an embodiment of the invention; and

fig. 5 shows a perspective view of an end plate compression part of an assembly device comprising a drive turntable for driving a movable part according to an embodiment of the invention.

Detailed Description

In the context of the present invention, the axial direction a corresponds to or is parallel to the direction between the end faces of the stator core; which also corresponds to the direction of the motor central axis in which the stator core is mounted. The circumferential direction denotes a direction corresponding to or parallel to the circumferential direction of the stator core when viewed in the axial direction of the stator core and the radial direction R denotes a direction corresponding to or parallel to the diameter direction of the stator core of the motor when viewed in the axial direction of the stator core. The above definition of directions is merely exemplary, as those skilled in the art will appreciate, it is possible to define various directions according to various different orientations without departing from the scope of the present invention.

Fig. 1 shows a schematic view of the separation of a stator core 14, an upper end plate 12 and a lower end plate 16 of a stator 10 of a motor, in particular a brushless motor. As understood by those skilled in the art, typically, stator end plates 12 and 16, i.e., an upper end plate 12 and a lower end plate 16, are secured to both end faces of a stator core 14 of the stator 10, respectively, and these end plates are typically made of an insulating material, such as plastic, resin, or the like. It is to be noted that although the stator end plate is divided into an upper end plate and a lower end plate according to the mounting position thereof, it has a similar or identical configuration, respectively, in the context of the present invention, the scope of the stator end plate includes both the upper end plate and the lower end plate, unless explicitly indicated otherwise.

These stator end plates include end plate end walls 122, 162 configured to abut the peripheral end faces 142 of the stator core 14 of the motor when installed therein; and end plate vertical walls 124, 164, the end plate vertical walls 124, 164 being configured to be snap-engaged in the slots 144 in the stator core for winding the coils when installed in the stator core 14 of the motor and the end plate vertical walls 124, 164 extending axially from the end plate end walls 122, 162. The cross section of the end plate vertical walls 124, 164 perpendicular to the axial direction is configured to be substantially the same as the same cross sectional shape of the slots 144 in the stator core 14 in which the coils are wound. More specifically, by way of example and not limitation, in fig. 1 the endplate upright walls 124, 164 include an outer sidewall 1242, 1642 that is radially outward, a sidewall 1244, 1644 that extends generally radially inward, and an inner sidewall 1246, 1646 that is radially inward and thus has an open polygonal configuration. As an example, the outer sidewall may have a curved shape (e.g., a smooth shape or a bent shape composed of a plurality of branch lines), the sidewall extends radially inward from both wall ends of the outer sidewall in the circumferential direction and the inner sidewall is two inner sidewalls respectively extending from both sidewalls in a substantially circumferential direction opposite or opposite to each other, the two inner sidewalls being spaced apart from each other in the circumferential direction by a certain distance without being connected to each other such that the end plate vertical walls 124, 164 constitute a non-closed cross section. Furthermore, it is conceivable that the cross section of the end plate vertical wall 124, 164 perpendicular to the axial direction is completely inscribed in the end plate end wall 122, 162, in other words the outer side wall and the inner side wall of the end plate vertical wall are at a distance from the outer edge and the inner edge of the annular end plate end wall 122, 162, respectively, wherein the distance between the outer side wall of the end plate vertical wall and the outer edge of the annular end plate end wall corresponds to the thickness of the peripheral end face 142 of the stator core.

Further, in order to snap-engage the stator end plates 12, 16 into the slots 144 in the stator core 14 by means of the end plate vertical walls 124, 164, the cross-sectional dimension of the end plate vertical walls 124, 164 gradually decreases from the position of the end plate end walls 122, 162 (also referred to as base) toward the position away from the end plate end walls 122, 162 and the dimension at the base is slightly larger than the cross-sectional dimension of the slots 144 of the stator core 14, so that when the free ends of the end plate vertical walls 124, 164 are aligned with the slots into which the stator core 14 is inserted, the stator end plates 12, 16 can be snap-engaged into the stator core 14 by pressing the stator end plates 12, 16 to be larger in dimension as they are closer to the base during insertion into the slots 144 of the stator core 14, at the time of final insertion of the stator end plates 12, 16 into the slots 144. As an example, in order to insert the end plate vertical walls 124, 164 having the larger-sized base portion into the stator core 14, it is necessary to apply an inward radial force of not less than 5N, for example, and preferably, the radial force is about 15N, for example. As another aspect of the present invention, to ensure ease of installation, the inward radial force may also be selected to be no more than 50N. Although examples of the amount of inward radial force that may be applied are specifically described herein, those skilled in the art will appreciate that these values are merely exemplary and not limiting, and that any suitable amount of inward radial force may be used, such as less than 5N or greater than 50N, etc., depending on the particular design of the endplate.

Of course, it is conceivable that the shape of the cross section of the end plate vertical walls 124, 164 naturally changes and adapts depending on the shape of the cross section of the slots of the stator core 14.

As a variant, it is also conceivable that the stator end plates 12, 16 further comprise inner projections extending radially inwards from the radially inner side of the end plate end wall 122, the position of these inner projections corresponding to the position of the teeth for winding in the stator core 14 and abutting against the teeth of the stator core in the case of mounting of the stator end plates in the stator core of the motor. These inner projections also include tongues which extend axially away from the teeth with the stator end plates 12, 16 mounted in the stator core 14 of the motor to cooperate with similar corresponding structures of the stator end plates 16, 12 provided at the other end of the stator core to accommodate the windings of the windings. These inner protrusions may also include coatings that extend from both circumferential sides of the inner protrusions toward the teeth and both sides of the teeth in the case where the stator end plates 12, 16 are installed in the stator core 14 of the motor. As an example, the cladding connects the inner protrusion and the radially inner side of the end plate end wall at the same time and can clamp the teeth of the stator core to some extent.

As explained previously, the above-described configurations are each applicable to the upper end plate and the lower end plate. But also each comprise a different specific configuration for the superior and inferior endplates. By way of example and not limitation, it also comprises, for the lower end plate 16, a housing portion extending from the end plate end wall opposite the end plate vertical wall for housing the jumper wires of the windings, and, for the upper end plate 12, a threaded hole for fixing the terminal block. It will be appreciated by those skilled in the art that the stator end plate can be specifically designed according to the winding pattern and the wiring pattern without departing from the scope of the present invention.

A schematic view of an end plate compression part 200 of an assembly apparatus for a stator end plate according to an embodiment of the present invention is described below with reference to fig. 2a-3 b. Fig. 2a shows a perspective view of an end plate compression part of an assembly apparatus for a stator end plate according to an embodiment of the invention, wherein the end plate compression part is in an open state; fig. 2b shows a perspective view of an end plate compression part of an assembly device for a stator end plate according to an embodiment of the invention, wherein the end plate compression part is in a closed state; fig. 3a shows a top view of an end plate compression part of an assembly device for a stator end plate according to an embodiment of the invention, wherein the end plate compression part is in an open state; and figure 3b shows a top view of an end plate compression part of an assembly device for a stator end plate according to an embodiment of the invention, wherein the end plate compression part is in a closed state.

In the scope of the present invention, the above-described assembling apparatus includes a stator core holding portion (not shown) configured to hold the stator core 14; end plate holders (not shown) configured to hold the stator end plates 12, 16 such that the end plate vertical walls 124, 164 are aligned with the slots 144 of the stator core, respectively; an end plate compression portion 200 configured to receive the stator end plate held by the end plate holding portion in an open state (as shown in fig. 2a, 3 a) and to press an end plate vertical wall of the stator end plate inward in a closed state (as shown in fig. 2b,3 b); an end plate fitting portion (not shown) configured to move the stator end plates 12, 16 toward the stator core 14 and guide free ends of the end plate vertical walls 124, 164 of the stator end plates 12, 16 into the tooth slots 144 after the end plate compression portion 200 completes compression of the stator end plates 12, 16 in the closed state.

The applicant has appreciated that although in one embodiment of the invention the assembly device is described as comprising a stator core holding part, an end plate compression part, an end plate assembly part, the skilled person will understand that in practice when designing the assembly device one or more of the above mentioned parts may be omitted or replaced by other configurations while still achieving its function or the function of several of the above mentioned parts being achieved by one part, but all of these variants also depart from the scope of the invention. For example, the end plate fitting portion thereof can be omitted and replaced manually, etc.

In the scope of the present invention, the stator core holding portion (not shown) is configured to hold the stator core 14. As will be understood by those skilled in the art, the stator core holding portion is configured to removably hold the stator core 14. As an example, the stator core holding portion can hold the stator core from the outer circumferential surface of the stator core or can be configured to be able to support the stator core or the like in a position-stable manner. Also by way of example, the stator core holding portion includes any configuration configured to be able to hold the stator core at an appropriate position without departing from the scope of the present invention. As an example, the stator core holding portion is configured in a supporting configuration or a clamping configuration.

In the scope of the present invention, the end plate holding portion (not shown) is configured to hold the stator end plates 12, 16 such that the end plate vertical walls 124, 164 thereof are aligned with the tooth grooves of the stator core, respectively. As an example, the end plate retention portions are configured to retain the stator end plates 12, 16 above the stator core 14 such that the end plate vertical walls 124, 164 are aligned with the stator core tooth slots 144, respectively. As an example, the end plate holding portion is configured to hold the stator end plate along the outer circumferential side wall of the end plate end wall 122, 162 of the stator end plate 12, 16, and therefore, the end plate holding portion is configured such that the shape of the clamping portion thereof matches the shape of the outer circumferential side wall of the end plate end wall. As another example, the end plate holding portion can hold the stator end plate at any suitable position of the stator end plate.

In the scope of the present invention, the end plate compression portion 200 is configured to receive the stator end plate held by the end plate holding portion in an open state (as shown in fig. 2a, 3 a) and to inwardly contract the end plate vertical wall of the stator end plate in a closed state (as shown in fig. 2b,3 b). It should be understood herein that as described above with respect to the end plate vertical walls of the stator end plates 12, 16, due to the open polygonal configuration of the end plate vertical walls 124, 164, when the end plate vertical walls 124, 164 are inwardly contracted, their cross-sectional shape and area will correspondingly contract. It should also be understood here that there are one or more intermediate transition positions between the open and closed states of the end plate compression. It should also be understood that the open state of the end plate compression 200 and one or more of the one or more intermediate transition positions also correspond to a free state of the stator end plates 12, 16 (i.e., no force is applied to the end plate vertical walls) and the closed state and the other of the one or more intermediate transition positions correspond to a compressed state of the stator end plates 12, 16 (i.e., there is a force applied to the end plate vertical walls and the closed state corresponds to a maximum force applied to the end plate end walls, in other words, the closed state corresponds to a final compressed state of the stator end plates). More specifically, the end plate compression portion 200 presses the end plate vertical walls of the stator end plate inward along the outer sides of the peripheries of the end plate vertical walls 124, 164 in the closed state.

In an exemplary embodiment of the present invention, the stator end plates 12, 16 are generally configured in a ring shape. In this case, the end plate compression portion 200 is also integrally configured to be able to completely surround the stator end plate. As an example, the end plate compression portion 200 comprises movable parts 202 corresponding to the number of end plate vertical walls of the stator end plate and a cage 204 for movably holding the movable parts such that the movable parts each move outwards in a radial direction when the end plate compression portion is open and the movable parts each move inwards close to each other radially when the end plate compression portion is closed and thus abut against the end plate vertical walls, respectively. Although the movable member 202 is described herein as abutting the end plate vertical wall from the outside thereof and retracting the end plate vertical wall from the outside inward, it will be understood by those of ordinary skill in the art that the present invention is not limited to the specific description set forth above.

As described above, in the exemplary embodiment of the present invention, the movable member 202 is configured in a plate shape and includes the body 206 and the protrusion 208, the body includes the abutment surface 210 oriented radially inward in the circumferential direction and the protrusion protrudes radially inward from the abutment surface, the abutment surface 210 is configured to abut against a radially outer side of the end plate vertical wall in a shape-fitting manner in the closed state of the end plate compression portion 200 and the protrusion 208 is configured to be interposed between adjacent two end plate vertical walls in the closed state. In the above-described exemplary embodiment, the body 206 of the movable member 202 is configured such that both side surfaces 212 thereof in the circumferential direction are parallel to each other, respectively, but the scope of the present invention is not limited thereto. As an example, the protrusion 208 protrudes outward from the center of the abutment surface 210 such that there are two abutment surfaces of the same shape and size on both sides of the protrusion 208, respectively. This configuration enables all the movable parts to be configured in the same shape, facilitating mass production and repair replacement of the movable parts. Furthermore, the movable part 202 is provided with a drive engagement portion 214 for engagement with a drive structure.

Fig. 4 and 5 show a cross-sectional view and a perspective view of an end plate compression part of an assembly apparatus for a stator end plate according to an embodiment of the present invention. It is contemplated that in exemplary embodiments of the present invention, the body 206 (and the protrusion 208) is configured such that at least the upper surface of the movable member 202 is spaced a distance from the end plate end walls 122, 162 in the closed state of the end plate compression. As will be described later, when the compression of the stator end plates 12, 16 by the end plate compression portion 200 is completed (i.e., the end plate vertical walls are pressed inward), the stator end plates 12, 16 and the stator core 14 need to be moved close to each other so that the free ends of all the end plate vertical walls that are compressed can easily enter the tooth grooves 144 of the stator core to complete the subsequent press-fit assembly. Therefore, in the case of moving the stator end plates 12, 16 toward the stator core 14, in order to cause the end plate vertical walls 124, 164 of the stator end plates 12, 16 being compressed to enter the tooth slots 144 of the stator core 14, it is necessary to move the contact areas of the movable members 202 of the end plate compression portion 200 and the end plate vertical walls 124, 164 in the height direction (axial direction) of the end plate vertical walls 124, 164, and therefore, it is necessary to configure the body 206 (and the protruding portions 208) such that at least the upper surfaces in the movable members 202 are separated from the end plate end walls 122, 162 by a certain distance in the closed state of the end plate compression portion 200 to reserve a stroke for the relative movement of the stator core 14 and the movable members 202. However, the present invention is not limited to this, and as a modification, the compressed stator end plates 12, 16 may not be moved so that the stator core 14 moves toward the stator end plates. In this case, then, it is not necessary that the body (and the protrusion) is configured such that at least the upper surface in the movable member is separated from the end wall of the end plate by a certain distance in the closed state of the end plate compression portion, but it is relatively necessary that the body (and the protrusion) is configured such that at least the lower surface in the movable member is separated from the free end of the end wall of the end plate by a certain distance in the closed state of the end plate compression portion, so that the free end of the end plate vertical wall can be smoothly introduced into the gullet. As a further variant, the upper and lower surfaces of the movable element are each spaced from the free end of the end wall of the end plate.

In an exemplary embodiment of the present invention, the protrusion 208 is configured such that both sides of the protrusion in the circumferential direction abut the adjacent end plate vertical walls 124, 164, respectively, in the closed state of the end plate compression portion 200. Further, the free end of the projection does not extend beyond the inner side of the vertical wall of the end plate. As an example, the protrusion is configured to taper or remain constant in width (measured in the circumferential direction) from the connection with the body 206 to the free end of the protrusion. In the case of tapering, as the movable member 202 of the end plate compression portion 200 moves radially inward, the protrusion 208 gradually abuts the adjacent end plate vertical walls 124, 164 with greater pressure, so that pressure is additionally provided on both sides of the end plate vertical walls 124, 164 to promote compression of the end plate vertical walls of the stator end plate. Although the specific configuration of the end plate compressing part 200 is described above, the scope of the present invention is not limited thereto. As another alternative, the movable member 202 of the end plate compression portion 200 of the present invention is configured such that the geometry formed by the adjacent abutting faces of the adjacent movable members and the two facing sides of the protrusion in the closed state of the end plate compression portion matches and is substantially the same as the cross section of the end plate vertical wall 124, 164 at the position where the adjacent two movable members contact the end plate vertical wall, but the cross sectional area of the geometry is smaller than the cross sectional area of the end plate vertical wall at the position to provide compression to the end plate vertical wall.

In an exemplary embodiment of the present invention, the end plate fitting portion (not shown) is configured to move the stator end plate toward the stator core 14 and guide the free end of the end plate vertical wall 124, 164 of the stator end plate into the tooth groove 144 after the end plate compression portion completes the compression of the stator end plate 12, 16 in the closed state. As previously described, the end plate fitting part may be configured such that the stator core moves toward the compressed stator end plate such that the stator end plate remains fixed. As a variant, it is possible to simultaneously move the stator core and the stator end plates relatively towards each other to achieve the guiding of the free ends of the end plate vertical walls into the tooth slots. Also as a modification, the end plate fitting portion can be integrated with the stator core holding portion. Also as a variant, the end plate fitting may be a non-mechanical device, such as a human hand. Also as a modification, the end plate fitting portion is any moving means capable of bringing the compressed stator end plate and the stator core close to each other to achieve the preliminary assembly of the both.

In an exemplary embodiment of the present invention, the assembling apparatus as described above may additionally include a driving portion (not shown) configured to drive the radial movement of the movable member 202 in the end plate compressing portion 200 and provide the radially inward pressing of the end plate vertical walls 124, 164. As a modification, the driving portion is also configured to be able to drive the movement and force application of the end plate fitting portion. As an example, the driving portion is a motor device. It will be understood by those skilled in the art that the drive portion may be of any other possible configuration capable of performing the above-described function, such as a hydraulic device, a pneumatic device, etc

In an exemplary embodiment of the present invention, the assembling apparatus as described above may additionally include an attitude adjusting portion configured to adjust the attitude and position of the stator core 14 in the stator core holding portion and/or the stator end plates 12, 16 in the end plate holding portion, respectively. As will be appreciated by those skilled in the art, in assembling the stator end plates 12, 16 and the stator core 14, it is necessary to ensure proper positioning between certain specific portions of the stator end plates and the stator core so that the assembled stator end plates and stator core can most effectively accommodate the subsequent winding process. To ensure such good relative orientation, there are references on the stator end plates 12, 16 and the stator core 14, such as specific shapes (e.g. notches, etc.) provided on the end plate end walls of the stator end plates, ridges or slots provided on the stator core, specific markings (e.g. colour patterns, etc.) provided on the end plate end walls of the stator end plates, so that the stator core holder and the end plate holder can hold the stator core and the stator end plates in the correct relative orientation by means of a proper orientation between the references before assembling the stator end plates to the stator core. By way of example and not limitation, the attitude adjustment portion includes a recognition system (e.g., a camera recognition system) capable of recognizing reference portions on the stator end plate and the stator core, respectively, and determining a relative orientation therebetween; and an adjustment mechanism that adjusts an orientation between the stator core and the stator end plate to a desired position. By way of example and not limitation, such adjustment may be accomplished by adjusting the stator end plates only by the adjustment structure, such as the stator core remaining stationary during adjustment. By way of example and not limitation, the adjustment mechanism is a robotic arm or the like having sufficient freedom of movement.

According to another embodiment of the present invention, the assembling apparatus for a stator end plate further comprises a center compression part (not shown) concentrically disposed in the intermediate space of the end plate compression part 200 and configured to be received in the stator end plate 12, 16 held by the end plate holding part in a contracted state and to press the inner side of the end plate vertical wall 124, 164 of the stator end plate 12, 16 in a radially outward direction in an expanded state, in addition to the end plate compression part 200 described with reference to fig. 2a to 4. In other words, the central compression portion passes through the intermediate space of the end plate end wall 122, 162 of the stator end plate 12, 16 and contacts and presses the end plate inside outward against the end plate vertical wall 124, 164 inside. The contracted state of the central compression portion is synchronized with the opened state of the end plate compression portions and the expanded state is synchronized with the closed state of the end plate compression portions. In other words, the end plate compression portion may also be referred to as an outer compression portion and the center compression portion may also be referred to as an inner compression portion.

In an exemplary embodiment of the present invention, the central compression portion includes a central movable portion (not shown) and a central retainer (not shown) supporting the central movable portion, the retainer being entirely built into the intermediate space of the end plate end walls 124, 164 (which may or may not contact the inner sides of the end plate end walls) when the central compression portion is operated and the central movable portion being configured to protrude radially outward from the retainer in an expanded state to abut against the inner sides of the end plate vertical walls and to retract into the central retainer in a contracted state. As an example, the central movable portion includes a main body and a guide portion. The guide portion is fixedly connected with the main body and can be matched with a guide rail arranged in the retainer to ensure the guidance of the central movable portion. The body is configured in a plate shape and includes an abutting face which can be abutted snugly against the inner side of the end plate vertical wall so that the center movable portion can be effectively abutted against and pressed against the end plate vertical wall in the expanded state of the center compressed portion. As an example, the abutment surface can face the protrusion of the movable member of the end plate compression portion at an intermediate position and thus the single central movable portion abuts against a portion of the inner sides of the adjacent two end plate vertical walls, respectively, in the case where the inner side walls are two inner side walls extending from the two side walls in the substantially circumferential direction opposite to each other, respectively, the single central movable portion abuts against one of the two inner side walls of the adjacent two end plate vertical walls, respectively. In the expanded state of the central active portion, the abutment surface may or may not contact the projection. As will be appreciated by those skilled in the art, this central activity also includes a drive mechanism, which may be separate from or integrated with the aforementioned drive section.

Further, as shown in fig. 4 and 5, the driving engaging portions 214 of the movable member 202 of the end plate compression portion 200 are convex columns each provided on one surface thereof in the axial direction of the end plate compression portion 200, the driving dial 220 substantially entirely covers one side of the end plate compression portion 202 and a through groove 222 is opened on the body of the driving dial 220. This through slot 222 is configured to be arc-shaped when viewed in the axial direction and the stud of the movable part 202 can be correspondingly received in the through slot 222, such that the stud can be driven to move along the through slot 222 when the drive dial 220 is rotated to convert the rotational movement of the drive dial 220 into a translational movement of the movable part 202. As an example, as shown in fig. 5, the number of through slots of drive dial 220 corresponds to the number of studs and the overall length of the through slots in the radial direction of drive dial 220 is substantially equal to the required translation distance of movable part 202 between the open and closed states. Further, the ends of the through slot 222 are configured to align with the posts at the positions where the movable member 202 is in the open and closed states, respectively.

Although not described herein, the assembly apparatus of the present invention may additionally include a control device and a computing device, wherein the control device is used for receiving instructions from a user or the computing device to control the operation of each functional part and the computing device is used for counting, image recognition calculation, force magnitude adjustment, and the like.

Although various specific embodiments and modifications of the present invention have been described above, those skilled in the art can make various substitutions or modifications without departing from the scope of the present invention, and such substitutions, modifications or equivalents also fall within the scope of the claims of the present invention.

Claims (10)

1. An assembly apparatus for a stator end plate (12, 16) of a brushless motor for a power tool, the stator end plate including an end plate end wall (122, 162) configured to abut a peripheral end face (142) of a stator core (14); and an end plate vertical wall (124, 164) configured to snap-engage into a slot (144) in the stator core (14) in which a coil is wound and the end plate vertical wall (124, 164) extending axially from the end plate end wall (122, 162);

characterized in that the assembly device comprises:

a stator core holding portion configured to hold the stator core (14),

-an end plate holding portion configured to hold the stator end plates (12, 16) such that the end plate vertical walls (124, 164) of the stator end plates (12, 16) are aligned with the slots (144) of the stator core (14), respectively;

-an end plate compression portion (200) configured to receive the stator end plate (12, 16) held by the end plate holding portion in an open state and press the end plate vertical wall (124, 164) of the stator end plate (12, 16) inward along a peripheral outer side of the end plate vertical wall (124, 164) in a closed state;

-an end plate fitting configured to move the stator end plate (12, 16) towards the stator core (14) and to guide a free end of the end plate vertical wall (124, 164) of the stator end plate (12, 16) into the tooth slot (144) after the end plate compression part (200) completes compression of the stator end plate (12, 16) in the closed state.

2. The assembling apparatus of a stator end plate (12, 16) of a brushless motor for a power tool according to claim 1, characterized in that the stator end plate (12, 16) is configured in a ring shape and the end plate compression portion (200) includes movable members (202) corresponding to the number of the end plate vertical walls (124, 164) and a holder (204) for movably holding the movable members, such that the movable members (202) each move outward in a radial direction when the end plate compression portion (200) is opened and the movable members (202) abut against the end plate vertical walls (124, 164), respectively, when the end plate compression portion (200) is closed.

3. The assembly apparatus of a stator end plate (12, 16) of a brushless motor for a power tool according to claim 2, characterized in that the movable member (202) is configured in a plate shape and includes a body (206) that includes an abutment face (210) oriented radially inward in a circumferential direction and from which the protrusion protrudes radially inward, and a protrusion (208), the abutment face (210) being configured to abut against a radially outer side of the end plate vertical wall (124, 164) in a shape-fitting manner in a closed state of the end plate compression portion (200) and the protrusion (208) being configured to be interposed between adjacent two end plate vertical walls (124, 164) in the closed state.

4. The assembly apparatus of a stator end plate (12, 16) of a brushless motor for a power tool according to claim 3, wherein a thickness of the body (206) is smaller than a height of the end plate vertical wall (124, 164) such that an upper surface and a lower surface of the movable member (202) are separated from the free ends of the end plate end wall (122, 162) and the end plate vertical wall (124, 164) by a distance in the closed state of the end plate compression portion (200).

5. The assembling apparatus of a stator end plate (12, 16) of a brushless motor for a power tool according to claim 3, wherein the protruding portion (208) is configured such that both side faces of the protruding portion in a circumferential direction abut the adjacent end plate vertical walls (124, 164), respectively, in a closed state of the end plate compression portion (200).

6. The assembly apparatus of a stator end plate (12, 16) of a brushless motor for a power tool according to any of claims 1-5, further comprising a driving portion configured to drive radial movement of a movable part (202) in the end plate compression portion (200) and provide radial inward pressing of the end plate vertical walls (124, 164).

7. The assembling apparatus of stator end plates (12, 16) of a brushless motor for a power tool according to any one of claims 1 to 5, further comprising an attitude adjusting portion configured to adjust an attitude and a position of the stator core (14) in the stator core holding portion and/or the stator end plates (12, 16) in the end plate holding portion, respectively.

8. The assembly apparatus of a stator end plate (12, 16) of a brushless motor for a power tool according to claim 7, characterized in that the stator end plate (12, 16) and the stator core (14) are further provided with a reference portion and the attitude adjusting portion is configured to determine a relative orientation between the stator end plate (12, 16) and the stator core (14) by means of a camera recognition system.

9. The assembling apparatus of the stator end plates (12, 16) of the brushless motor for the electric tool according to any one of claims 1 to 5, characterized by further comprising a central compression portion concentrically disposed in an intermediate space of the end plate compression portion (200) and configured to be received in the stator end plates (12, 16) held by the end plate holding portion in a contracted state and to press an inner side of the end plate vertical walls of the stator end plates in a radially outward direction in an expanded state, the contracted state being synchronized with an open state of the end plate compression portion (200) and the expanded state being synchronized with a closed state of the end plate compression portion (200).

10. The assembling apparatus of a stator end plate (12, 16) of a brushless motor for a power tool according to claim 9, wherein the central compression portion includes a central movable portion and a central holder supporting the central movable portion, the holder being entirely built in an intermediate space of the end plate end wall and the central movable portion being configured to protrude radially outward from the holder in an expanded state to abut against an inner side of the end plate vertical wall and to retract to the central holder in the contracted state.

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