Driving integrated servo motor

Abstract

The utility model discloses a driving integrated servo motor. The driving integrated servo motor comprises a rear end cover, a first PCB, a transition support, a second PCB and a cover cap which are sequentially arranged in the axial direction. One end of the transition support and / or the rear end cover radially position the first PCB, and the other end of the transition support and / or the cover cap radially position the second PCB. Wherein the positions of screw holes in the cover cap, the transition support and the rear end cover are consistent, first screws penetrate through the cover cap and the transition support to be connected and fixed to the rear end cover, and the two PCBs are fixed at the same time. According to the driving integrated servo motor provided by the utility model, the transition bracket is matched and fixed with the rear end cover and the cover cap, and the two PCBs are fixed, so that the assembly efficiency of the motor is improved, the purchase cost of motor parts is reduced, and the competitiveness of products in the market is improved.

Description

Technical Field

[0001] The utility model relates to the fields of industrial control, medical equipment, and in particular to a drive-integrated servo motor. Background Art

[0002] At present, some drivers for integrated low-voltage DC servo motors are composed of two PCB circuit boards, which are fixed with eight hexagonal copper studs and four screws, and finally covered with a cover. One end of the hexagonal copper stud is processed with an external thread, and the other end is processed with an internal thread. Four fixing screw holes are set on each of the two PCB circuit boards.

[0003] PCB circuit board installation method: hexagonal copper support column → first PCB circuit board → hexagonal copper stud → second PCB circuit board, and install in a stacked manner. Four threaded holes are set at the bottom of the rear end cover of the motor, and the four hexagonal copper studs are fixed to the rear end cover of the motor through threaded connection. The first PCB circuit board is placed on the end face of the four hexagonal copper studs, the PCB circuit board is supported, and then another four hexagonal studs are passed through the screw holes on the first PCB circuit board, and fixed to the end faces of the four hexagonal copper studs previously installed through threaded connection, while fixing the PCB circuit board. The second PCB circuit board is placed on the end face of the four hexagonal copper studs installed on the second layer, and then four screws are passed through the screw holes on the second PCB circuit board to fix the second PCB circuit board to the end face of the second layer of hexagonal copper studs. This fixing method uses more parts, is troublesome to install, and affects production efficiency. The hexagonal copper studs are machined products with high procurement costs, which increases the production and manufacturing costs of the motor. Utility Model Content

[0004] In order to solve the technical problems that in the integrated drive motor of the prior art, two PCB circuit boards need to be installed through multiple hexagonal copper studs, resulting in the use of more parts, high manufacturing cost, troublesome installation, and affected production efficiency, the utility model provides a drive-integrated servo motor to solve the above problems.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a drive-integrated servo motor, comprising a rear end cover, a first PCB circuit board, a transition bracket, a second PCB circuit board and a cover cover which are arranged in sequence along the axial direction; one end of the transition bracket and / or the rear end cover radially positions the first PCB circuit board, and the other end of the transition bracket and / or the cover cover radially positions the second PCB circuit board; wherein the screw holes on the cover cover, the transition bracket and the rear end cover are in the same position, and are connected and fixed to the rear end cover by passing through the cover cover and the transition bracket through the first screw, thereby fixing the two PCB circuit boards at the same time.

[0006] Furthermore, the inner end surface of the rear end cover has a boss protruding toward the first PCB circuit board, and the boss is connected to a positioning pin that cooperates with the first PCB circuit board.

[0007] Furthermore, the side surface of the rear end cover has two avoidance notches, and the circumferential angle of the two avoidance notches is 90°~135°.

[0008] Furthermore, two or more positioning pins are symmetrically arranged.

[0009] Furthermore, the transition bracket has a plurality of first support columns abutting against the first PCB circuit board and a plurality of second support columns abutting against the second PCB circuit board.

[0010] Furthermore, a cylindrical pin is provided at the end of the second support column, and a step surface is formed at the connection between the cylindrical pin and the second support column. The cylindrical pin radially positions the second PCB circuit board, and the step surface axially positions the second PCB circuit board.

[0011] Furthermore, the center of the first support column is through-through, and a compression spring abutting against the first PCB circuit board is arranged inside the first support column.

[0012] Furthermore, the inner wall of the cover is provided with a support plate directly facing the second support column, and the support plate has a circular hole for avoiding the cylindrical pin.

[0013] Furthermore, the transition bracket includes a bottom plate and an outer plate, the first support column and the second support column are arranged on the bottom plate, and the center of the bottom plate is hollow.

[0014] Furthermore, the first support column and the second support column are coaxially arranged in a one-to-one correspondence.

[0015] Furthermore, the transition bracket is made of plastic material.

[0016] Furthermore, the length of the first support column is smaller than the height of the outer plate; the length of the second support column is larger than the length of the first support column.

[0017] Furthermore, a height difference h≥0 between the boss and an end surface of the rear end cover facing the first PCB circuit board.

[0018] The beneficial effects of the utility model are:

[0019] (1) The drive-integrated servo motor described in the utility model adopts a transition bracket to cooperate with the rear end cover and the cover to fix the two PCB circuit boards, thereby improving the motor assembly efficiency, reducing the procurement cost of motor parts, and improving the competitiveness of the product in the market.

[0020] (2) The utility model provides a first support column and a second support column at both ends of the transition bracket, respectively, which can play the role of axial and radial positioning of the PCB circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is an exploded view of a specific implementation of the drive-integrated servo motor described in the utility model;

[0023] Figure 2 It is a cross-sectional view of a specific implementation of the drive-integrated servo motor described in the utility model;

[0024] Figure 3 It is an axial cross-sectional view of the rear end cover of the utility model;

[0025] Figure 4 It is a three-dimensional diagram of the rear end cover of the utility model;

[0026] Figure 5 It is a schematic diagram of the assembly of the rear end cover and the first PCB circuit board in the utility model;

[0027] Figure 6 It is a stereogram of a specific implementation of the transition bracket in the utility model;

[0028] Figure 7 It is a stereogram of a specific implementation of the transition bracket in the utility model;

[0029] Figure 8 It is a three-dimensional diagram of the cover in the utility model.

[0030] In the figure, 1, front cover, 2, rear cover, 201, boss, 202, positioning hole, 203, avoidance gap, 204, mounting hole, 3, casing, 4, corrugated spring sheet, 5, rotor assembly, 6, stator assembly, 7, induction magnet, 8, magnetic isolation sleeve, 9, first PCB circuit board, 10, second PCB circuit board, 11, cover, 1101, support plate, 1102, round hole, 12, connector cover, 13, transition bracket, 1301, first support column, 1302, second support column, 1303, cylindrical pin, 1304, step surface, 1305, extrusion spring, 1306, bottom plate, 1307, outer plate, 14, positioning pin, 15, first screw, 16, screw hole, 17, second screw, 18, third screw, 19, fourth screw. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] A drive-integrated servo motor, such as Figure 1 As shown, the motor generally includes a front cover 1, a rear cover 2, a housing 3, a wave spring sheet 4, a rotor assembly 5, a stator assembly 6, an induction magnet 7, a magnetic isolation sleeve 8, a first PCB circuit board 9, a second PCB circuit board 10, a cover 11, and a connector cover 12. The rear cover 2 is installed at the rear end of the housing 3, and the first PCB circuit board 9, the second PCB circuit board 10, and the cover 11 are connected in sequence and fixed to the rear end of the rear cover 2. The front cover 1 is fixed to the housing 3 by a third screw 18, and the connector cover 12 is fixed to the cover 11 and the rear cover 2 by a fourth screw 19.

[0033] like Figure 1 and Figure 2 As shown, the utility model improves the installation structure of the cover 11, the first PCB circuit board 9, the second PCB circuit board 10, and the rear end cover 2. Specifically, a transition bracket 13 is added between the first PCB circuit board 9 and the second PCB circuit board 10, one end of the transition bracket 13 and / or the rear end cover 2 radially positions the first PCB circuit board 9, and the other end of the transition bracket 13 and / or the cover 11 radially positions the second PCB circuit board 10; wherein, the screw holes 16 on the cover 11, the transition bracket 13, and the rear end cover 2 are aligned, and are connected and fixed to the rear end cover 2 by the first screw 15 passing through the cover 11 and the transition bracket 13, thereby fixing the two PCB circuit boards at the same time.

[0034] This solution does not require the installation of eight hexagonal copper studs and four screws, which improves the motor assembly efficiency, reduces the procurement cost of motor parts, and improves the product's competitiveness in the market.

[0035] Transition bracket 13:

[0036] The transition bracket 13 has a plurality of first support columns 1301 abutting against the first PCB circuit board 9 and a plurality of second support columns 1302 abutting against the second PCB circuit board 10. The first support columns 1301 or the second support columns 1302 can be used to position the two PCB circuit boards in one axial direction or in a radial direction, and are specifically designed according to the structures of the rear end cover 2 and the cover 11. Figure 6As shown, the transition bracket 13 includes a bottom plate 1306 and an outer plate 1307. The first support column 1301 and the second support column 1302 are arranged on the bottom plate 1306. The center of the bottom plate 1306 is hollowed out. The hollow design can reduce the weight of the transition bracket 13 and improve the heat dissipation efficiency. In order to prevent the bottom plate 1306 from being subjected to shear force, the first support column 1301 and the second support column 1302 are preferably arranged coaxially in a one-to-one correspondence.

[0037] In the preferred design, the transition bracket 13 is made of plastic. The low-voltage DC servo motor will generate relatively high heat, and the electronic components such as the MOS in the driving part will also generate heat. The cover 11 is generally made of aluminum alloy to facilitate heat dissipation. The heat of the motor body coil will be quickly transferred to the cover 11, which is not conducive to the heat dissipation of the electronic components such as the MOS in the driving part. The thermal conductivity of plastic is lower than that of metal. When the transition bracket 13 is made of plastic, the heat transfer of the motor body to the cover 11 can be reduced, which is conducive to the heat dissipation of the electronic components in the driving part.

[0038] In order to disperse the positioning structures, the present invention preferably sets the radial positioning structure for the first PCB circuit board 9 on the rear cover 2, and sets the radial positioning structure for the second PCB circuit board 10 on the transition bracket 13. To this end, the rear cover 2 is improved as follows on the basis of the traditional structure: the inner end surface of the rear cover 2 has a boss 201 protruding toward the first PCB circuit board 9, and the boss 201 is connected to a positioning pin 14 that cooperates with the first PCB circuit board 9. Figure 3 and Figure 4 As shown, the boss 201 is in the shape of a circular ring, and a positioning hole 202 is provided on the boss 201. The positioning pin 14 is installed on the positioning hole 202. It is preferred that two or more positioning pins 14 are symmetrically arranged. In the present embodiment, two positioning pins 14 are arranged. The first PCB circuit board 9 is supported by the bottom boss 201 of the rear end cover 2. The boss 201 can limit the axial movement of the first PCB circuit board 9 in one direction. The two positioning pins 14 are used for radial positioning to ensure that the induction magnet 7 is concentric with the magnetic encoder chip on the first PCB circuit board 9. In a further design, the height difference h≥0 between the boss 201 and the end face of the rear end cover 2 facing the first PCB circuit board 9 can reduce the distance between the boss 201 and the first PCB circuit board 9, thereby reducing the length of the positioning pin 14 and improving the rigidity of the positioning pin 14. At the same time, the raised boss 201 can support the first PCB circuit board 9 to avoid interference between the first PCB circuit board 9 and the end face of the rear end cover 2 (such as Figure 5 as shown).

[0039] like Figure 4As shown, the side of the rear end cover 2 preferably has two avoidance gaps 203, which are respectively used to install the communication connector and the dial switch on the first PCB circuit board 9. The circumferential angle of the two avoidance gaps 203 is 90°~135°, and the angle selected in this embodiment is 90°.

[0040] The radial positioning of the second PCB circuit board 10 is achieved by the second support column 1302. Figure 2 and Figure 6 As shown, a cylindrical pin 1303 is provided at the end of the second support column 1302, and a step surface 1304 is formed at the connection between the cylindrical pin 1303 and the second support column 1302. The cylindrical pin 1303 radially positions the second PCB circuit board 10, and the step surface 1304 axially positions the second PCB circuit board 10. The axial position of the second PCB circuit board 10 is controlled by the step surface 1304, that is, by the length of the second support column 1302. In a preferred embodiment, the length of the first support column 1301 is less than the height of the outer plate 1307; the length of the second support column 1302 is greater than the length of the first support column 1301. During installation, the cylindrical pin 1303 is inserted into the corresponding hole of the second PCB circuit board 10 to achieve radial positioning of the second PCB circuit board 10, and at the same time, the second PCB circuit board 10 contacts the step surface 1304, and the second PCB circuit board 10 is pressed between the step surface 1304 and the cover 11 by the last first screw 15.

[0041] Due to certain tolerances in parts processing, the first PCB circuit board 9 may move axially, affecting the signal output of the encoder. For this reason, the utility model preferably installs a compression spring 1305 on the first support column 1301. Specifically, the center of the first support column 1301 is through, and a compression spring 1305 is arranged inside the first support column 1301 to abut against the first PCB circuit board 9. Figure 7 As shown, four first support columns 1301 and four second support columns 1302 are arranged on the transition bracket 13, and compression springs 1305 are arranged in the four first support columns 1301. The compression springs 1305 press the first PCB circuit board 9 to avoid axial movement.

[0042] Cover 11:

[0043] On the basis of the positioning by the cylindrical pin 1303, the inner wall of the cover 11 is provided with a support plate 1101 directly facing the second support column 1302, and the support plate 1101 has a circular hole 1102 to avoid the cylindrical pin 1303. Figure 8As shown, a support plate 1101 is provided at each of the four corners, which abuts against the end surface of the second PCB circuit board 10 to limit the axial movement of the second PCB circuit board 10 in one direction. The position of the circular hole 1102 corresponds to the cylindrical pin 1303. The height of the cylindrical pin 1303 can be greater than the height of the second PCB circuit board 10, so that the cylindrical pin 1303 can extend into the circular hole 1102, thereby preventing the cylindrical pin 1303 from detaching from the second PCB circuit board 10.

[0044] The outer edges of the cover 11, the transition bracket 13 and the rear end cover 2 are provided with screw holes 16 with the same hole positions.

[0045] Installation method: The front end of the first PCB circuit board 9 is pressed on the surface of the boss 201 and is positioned through two positioning pins 14. The extrusion spring 1305 of the transition bracket 13 is pressed on the rear end of the first PCB circuit board 9. Then the second PCB circuit board 10 passes through the cylindrical pin 1303. The front end of the second PCB circuit board 10 is against the step surface 1304. The cover 11 is pressed on the rear end surface of the second PCB circuit board 10. Finally, the first screw 15 is used to connect and fix the cover 11, the transition bracket 13 and the rear end cover 2, thereby fixing the two PCB circuit boards in the middle.

[0046] The outer edge of the rear end cover 2 is also provided with a mounting hole 204 , which is fixed to the housing 3 by a second screw 17 .

[0047] In the description of the present invention, it is necessary to understand that the terms "front", "rear", "inside", "outside", "axial", "radial", etc., indicating orientations or positional relationships, are 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, 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 cannot be understood as a limitation on the present invention.

[0048] In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the term "connection" 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 an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0049] In this specification, the schematic representation of the terms does not necessarily refer to the same embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in one or more embodiments.

[0050] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A drive-integrated servo motor, characterized in that: It includes a rear end cover, a first PCB circuit board, a transition bracket, a second PCB circuit board and a cover which are sequentially arranged along the axial direction; One end of the transition bracket and / or the rear end cover radially positions the first PCB circuit board, and the other end of the transition bracket and / or the cover radially positions the second PCB circuit board; The screw holes on the cover, transition bracket and rear end cover are in the same position, and are connected and fixed to the rear end cover by passing through the cover and transition bracket through the first screw, thereby fixing two PCB circuit boards at the same time.

2. The drive-integrated servo motor according to claim 1, characterized in that: The inner end surface of the rear end cover has a boss protruding toward the first PCB circuit board, and the boss is connected to a positioning pin that cooperates with the first PCB circuit board.

3. The drive-integrated servo motor according to claim 2, characterized in that: The side surface of the rear end cover is provided with two avoidance notches, and the circumferential angle of the two avoidance notches is 90° to 135°.

4. The drive-integrated servo motor according to claim 2, characterized in that: The positioning pins are symmetrically arranged in two or more.

5. The drive-integrated servo motor according to any one of claims 1 to 4, characterized in that: The transition bracket has a plurality of first support columns abutting against the first PCB circuit board and a plurality of second support columns abutting against the second PCB circuit board.

6. The drive-integrated servo motor according to claim 5, characterized in that: A cylindrical pin is arranged at the end of the second support column, and a step surface is formed at the connection between the cylindrical pin and the second support column. The cylindrical pin radially positions the second PCB circuit board, and the step surface axially positions the second PCB circuit board.

7. The drive-integrated servo motor according to claim 5, characterized in that: The center of the first support column is through-through, and a compression spring is arranged inside the first support column to abut against the first PCB circuit board.

8. The drive-integrated servo motor according to claim 6, characterized in that: The inner wall of the cover is provided with a support plate directly facing the second support column, and the support plate is provided with a circular hole for avoiding the cylindrical pin.

9. The drive-integrated servo motor according to claim 5, characterized in that: The transition bracket includes a bottom plate and an outer plate, the first support column and the second support column are arranged on the bottom plate, and the center of the bottom plate is hollowed out.

10. The drive-integrated servo motor according to claim 5, characterized in that: The first support columns and the second support columns are coaxially arranged in a one-to-one correspondence.

11. The drive-integrated servo motor according to claim 9, characterized in that: The length of the first support column is less than the height of the outer side plate; the length of the second support column is greater than the length of the first support column.

12. The drive-integrated servo motor according to claim 1, characterized in that: The transition bracket is made of plastic material.

13. The drive-integrated servo motor according to claim 2, characterized in that: The height difference h≥0 between the boss and the end surface of the rear end cover facing the first PCB circuit board.

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