Encoder assembly and assembling method thereof
By directly assembling the encoder housing and encoder cover together and installing heat dissipation materials before assembly, the existing encoder components have high clean environment requirements, inconvenient use of heat dissipation materials, and uneven gaps during assembly and maintenance, efficient production and maintenance are achieved, and heat dissipation efficiency and reliability are improved.
Patent Information
- Application Number
- CN202280100708.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2022-12-08
- Publication Date
- 2025-05-13
AI Technical Summary
During the assembly and maintenance of existing encoder components, there are problems such as high clean environment requirements, inconvenient use of heat dissipation materials, and uneven clearance, resulting in low heat dissipation efficiency.
By assembling the encoder housing and the encoder cover directly together to make it a whole and installing the heat dissipation material on the PCB before assembly, the encoder cover extrudes the heat dissipation material to fill the space sufficiently. In addition, the assembly method is adopted for separation of axial positioning and radial positioning.
The installation of encoder components is achieved in the ordinary workshop, reducing production investment; simplifying the maintenance process, avoiding damage and pollution of heat dissipation materials; and improving the heat dissipation efficiency and reliability of encoder components.
Smart Images
Figure CN119998631A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the mechanical field, and in particular to an encoder assembly for a motor and an assembly method thereof.
[0002] Application Background
[0003] The encoder assembly commonly used in motors at present is composed of an encoder body and a bearing system. Figure 1A and Figure 1B The figure shows a schematic diagram of the structure of a current encoder assembly and its assembly with a motor. Figure 1A and Figure 1B As shown, the encoder assembly 1 may include a code disc 11, a printed circuit board (PCB) 12, an encoder housing 13, an encoder cover 14, etc. After the code disc 11 and the PCB 12 are installed in the encoder housing 13, the PCB 12 is exposed to the outside, and a small part of the code disc 11 is also exposed.
[0004] When the encoder assembly 1 is installed on the motor 2, the encoder assembly 1 is connected to the motor shaft 21 through the coupling 3, and the flange structure at the edge of the encoder housing 13 cooperates with the first end face with the first limiting shaft hole on the rear end cover 22 of the motor 2 to perform radial and axial positioning, and the encoder housing 13 is fixed on the rear end cover 22. In order to solve the heat dissipation problem of PCB12, a special heat dissipation glue will be coated on PCB12, and then the encoder cover 14 will be installed. The encoder cover 14 cooperates with the flange structure at its edge and the second end face with the second limiting shaft hole on the rear end cover 22 to perform radial and axial positioning, and achieve fixation with the rear end cover 22 of the motor 2. The encoder cover 14 will squeeze the heat dissipation glue to make it completely adhered between the encoder cover 14 and PCB12, and the heat dissipation glue will naturally solidify after a certain period of time.
[0005] In addition, those skilled in the art are still working on finding other implementations of encoder components.
[0006] Application Contents
[0007] In view of this, an embodiment of the present application provides an encoder assembly on the one hand, and an assembly method of the encoder assembly on the other hand, so as to reduce production costs and maintenance costs.
[0008] To solve the above technical problems, the technical solution of this application is implemented as follows:
[0009] An encoder assembly comprises: an encoder housing and an encoder cover; wherein the encoder housing has a first flange structure, the first flange structure has a first mounting end face on the side facing the encoder cover; the encoder cover has a second mounting end face on the side facing the encoder housing; the first mounting end face and the second mounting end face can contact each other and be connected together through a connecting piece; the first flange structure has an annular positioning platform on the side away from the encoder cover, when the encoder assembly is assembled to a motor, the annular positioning platform cooperates with an axial hole on the rear end cover of the motor to achieve radial positioning of the encoder assembly; the encoder cover has a second flange structure, the second flange structure has a third mounting end face on the side facing the rear end cover, when the encoder assembly is assembled to the motor, the third mounting end face contacts with the fourth mounting end face on the rear end cover of the motor and can be connected together through a connecting piece to achieve axial positioning of the encoder assembly.
[0010] In one embodiment, the first connecting member is a screw, a buckle or a locking member; the second connecting member is a screw, a buckle or a locking member.
[0011] In one embodiment, the encoder assembly further includes: a PCB; characterized in that, before the PCB is installed in the encoder housing and the encoder cover is installed, a heat dissipation material is arranged on the PCB, and when the first mounting end surface and the second mounting end surface are connected, the encoder cover squeezes the heat dissipation material so that the heat dissipation material fully fills the space between the PCB and the encoder cover.
[0012] A method for assembling an encoder component, comprising: assembling a PCB into an encoder housing; aligning and connecting a second mounting end face of an encoder cover with a first mounting end face of the encoder housing; for the assembled encoder component, radial positioning of the encoder component on the motor is achieved by matching the annular positioning platform of the encoder housing with the axial hole of the rear end cover of the motor; and axial positioning and installation of the encoder component on the motor is achieved by contacting and connecting a third mounting end face on the encoder cover with a fourth mounting end face of the rear end cover of the motor.
[0013] In one embodiment, before the second mounting end surface of the encoder cover is aligned and connected with the first mounting end surface of the encoder housing, it further includes: setting a heat dissipation material on the PCB; when the second mounting end surface of the encoder cover is aligned and connected with the first mounting end surface of the encoder housing, the encoder cover squeezes the heat dissipation material so that the heat dissipation material fully fills the space between the PCB and the encoder cover.
[0014] It can be seen that in the embodiment of the present application, the encoder housing and the encoder cover are directly assembled together to make the encoder assembly a whole. Therefore, the PCB and the code disc can be encapsulated inside the encoder assembly in a clean room. At this time, when the encoder assembly is installed on the motor, it can be completed in an ordinary workshop, thereby getting rid of the restrictions on the production line layout and greatly reducing production investment.
[0015] In addition, for maintenance, the encoder assembly can be removed as a whole by removing the connector between the encoder cover and the rear end cover. There is no need to worry about the heat dissipation material being damaged or the encoder assembly being contaminated, thereby achieving efficient maintenance and reducing maintenance costs.
[0016] In addition, by directly assembling the encoder housing and the encoder cover, the gap between the encoder components can be reduced, thereby improving the heat dissipation efficiency of the encoder body and the encoder bearing, and improving the reliability and life of the encoder assembly.
[0017] Finally, by adopting an assembly method that separates axial positioning and radial positioning, the cumulative error can be reduced and the concentricity between the encoder assembly and the motor shaft can be improved, thereby further improving the reliability of the encoder assembly operation.
[0018] BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to better understand the present application, the embodiments of the present application will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can better understand the above and other features and advantages of the present application. In the accompanying drawings:
[0020] Figure 1A and Figure 1B The diagram is a schematic diagram of the structure of a current encoder assembly and its assembly with a motor.
[0021] Figure 2 It is a schematic diagram of the structure of the encoder assembly and its assembly with the motor in the embodiment of the present application.
[0022] Figure 3 It is a flowchart of the assembly method of the encoder assembly in the embodiment of the present application.
[0023] The reference numerals are as follows:
[0024]
[0025]
[0026] Methods of implementing this application
[0027] In the embodiment of the present application, the structure of the existing encoder assembly has the following problems:
[0028] 1) Since there are exposed parts in the encoder component 1, when the encoder component 1 is to be assembled on the motor 2, the assembly environment must be very clean. In actual production, this step is carried out in a special clean room. If there are three motors using this encoder component at the same time, three clean rooms must be built, or a large clean room must be built and each motor production line must be built around this clean room, which greatly restricts the spatial layout of the production line.
[0029] 2) For subsequent maintenance services, no matter which part of the motor is repaired, the encoder cover 14 generally needs to be removed, so the encoder PCB 12 and the like will be exposed, which may cause contamination of the encoder components.
[0030] 3) If the encoder cover 14 is removed during maintenance, the cured heat dissipation adhesive will be randomly disconnected, weakened, and cannot be reused. Therefore, the maintenance personnel need to clean up the damaged adhesive and then re-apply new heat dissipation adhesive. However, since this heat dissipation adhesive is composed of AB components and cannot be stored as a mixture, on-site mixing and coating will be very time-consuming and material-consuming, and the maintenance cost is high.
[0031] 4) The encoder housing 13 and the encoder cover 14 are respectively fixed on the rear end cover 22 of the motor 2. Due to the accumulation of the dimension chain, the fitting clearance between other encoder components and the inner hole of the encoder cover is uneven. In order to prevent mutual interference, the clearance can only be increased during design, which is not conducive to the heat dissipation of the encoder bearing.
[0032] For this reason, in the embodiment of the present application, it is considered to assemble the encoder housing 13 and the encoder cover 14 directly together, so that the encoder assembly becomes a whole, so that the tolerance chain between the two components is shortened, and there is no problem of uneven gap between other parts of the encoder and the encoder cover, so that the gap can be made very small (for example, less than 0.2mm), so that the heat of the encoder bearing can be transferred to the encoder cover 14 more, and dissipated by the fan, thereby improving the temperature rise problem of the encoder bearing. Before assembling the two components together, a heat dissipation material can be set on the PCB12, and the encoder cover 14 squeezes the heat dissipation material during assembly so that it fully fills the space between the PCB12 and the encoder cover 14. Since the two components are assembled into a whole, they can be disassembled as a whole during maintenance, so that the heat dissipation material will not be damaged. In this embodiment, the heat dissipation material 5 can be fluid or elastic. For example, it can be a fluid heat dissipation material, such as heat dissipation glue, or it can be an elastic heat dissipation material, such as a heat sink.
[0033] Furthermore, considering that after the two components are assembled into a whole, if the radial and axial positioning with the rear end cover 22 is still achieved through the flange structure on the edge of the encoder cover 14, it may cause the dimension chain between the encoder housing 13 and the rear end cover 22 to become very long, thereby increasing the cumulative tolerance, especially in the radial direction, which will cause the encoder assembly 1 and the motor shaft 21 to be non-concentric, thereby affecting the performance of the encoder. Therefore, in this embodiment, it is considered to perform radial positioning between the encoder housing 13 and the rear end cover 22 of the motor 2, and perform axial positioning between the encoder cover 14 and the rear end cover 22 of the motor 2, that is, to separate the positioning in the two directions, so as to reduce the cumulative tolerance of radial positioning and improve the coaxiality between the encoder assembly 1 and the motor shaft 21.
[0034] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the technical solution of the present application is described in detail below with reference to the accompanying drawings and examples.
[0035] Figure 2 The schematic diagram of the structure of the encoder assembly and the motor assembly in the embodiment of the present application is shown. Figure 2 As shown, in this embodiment, the encoder assembly 1 includes: a code disc 11, a PCB 12, an encoder housing 13 and an encoder cover 14, etc.
[0036] Among them, the encoder housing 13 has a first flange structure, the first flange structure has a first mounting end face 131 on the side facing the encoder cover 14, and the encoder cover 14 has a second mounting end face 141 on the side facing the encoder housing 13. After the code disc 11 and PCB12 and other components are assembled into the encoder housing 13, the first mounting end face 131 and the second mounting end face 141 can contact each other and be connected together through the first connecting member. In this embodiment, the first connecting member can be a screw member 4, and accordingly, a through hole can be set on any one of the first mounting end face 131 and the second mounting end face 141, and a threaded hole can be set on the other. In this embodiment, a through hole is set on the first mounting end face 131, and a threaded hole is set on the second mounting end face 141. In actual applications, it can be determined according to actual needs. In addition, in other embodiments, the connecting member can also be other structural members, such as buckles or locking members, etc., which are not listed here one by one. In this embodiment, before assembling the encoder housing 13 and the encoder cover 14 together, a heat dissipation material 5 can be first arranged on the PCB 12. During assembly, the encoder cover 14 squeezes the heat dissipation material 5 so that it fully fills the space between the PCB 12 and the encoder cover 14.
[0037] In addition, the first flange structure of the encoder housing 13 has an annular positioning platform 132 on the side away from the encoder cover 14. When the encoder assembly 1 is assembled on the motor 2, the annular positioning platform 132 cooperates with the shaft hole 221 on the rear end cover 22 of the motor 2 to achieve radial positioning. In this embodiment, there is a set gap between the first flange structure and the rear end cover 22 in the axial direction, so that axial positioning is no longer achieved.
[0038] The encoder cover 14 has a second flange structure, and the second flange structure has a third mounting end face 142 on the side facing the rear end cover 22. When the encoder assembly 1 is assembled to the motor 2, the third mounting end face 142 contacts the fourth mounting end face 222 on the rear end cover 22 of the motor 2 and can be connected together through a second connecting member to achieve axial positioning of the encoder assembly 1. In this embodiment, the second connecting member can be a screw member ( Figure 2 In addition, in other embodiments, the second connecting member may also be other structural members, such as a buckle or a locking member, which are not listed here. In this embodiment, there is a set gap between the second flange structure and the rear end cover 22 in the radial direction, so that radial positioning is no longer achieved.
[0039] Figure 3 FIG. 1 is a flow chart of the assembly method of the encoder assembly in the embodiment of the present application. Figure 3 As shown, the method may include the following processing:
[0040] Step 301 , assembling a PCB 12 into an encoder housing 13 .
[0041] Step 302 : disposing heat dissipation material on the PCB 12 .
[0042] Step 303, align and connect the second mounting end surface 141 of the encoder cover 14 with the first mounting end surface 131 of the encoder housing 13. At this time, the encoder cover 14 squeezes the heat dissipation material so that the heat dissipation material fully fills the space between the PCB 12 and the encoder cover 14.
[0043] Step 304 , for the assembled encoder assembly, the annular positioning platform 132 of the encoder housing 13 is matched with the shaft hole 221 of the rear end cover 22 of the motor 2 to achieve radial positioning of the encoder assembly on the motor 2 .
[0044] Step 305 , contacting and connecting the third mounting end surface 142 on the encoder cover 14 with the fourth mounting end surface 222 of the rear end cover 22 of the motor 2 , so as to achieve axial positioning and mounting of the encoder assembly on the motor 2 .
[0045] It can be seen that in the embodiment of the present application, the encoder housing 13 and the encoder cover 14 are directly assembled together to make the encoder assembly 1 a whole. Therefore, the PCB 12 and the code disk 11 can be packaged inside the encoder assembly 1 in a clean room. At this time, when the encoder assembly 1 is installed on the motor 2, it can be completed in an ordinary workshop, thereby getting rid of the restrictions on the layout of the production line and greatly reducing production investment.
[0046] In addition, for maintenance, the encoder assembly 1 can be removed as a whole by removing the connector between the encoder cover 14 and the rear end cover 22. There is no need to worry about the heat dissipation material being damaged or the encoder assembly 1 being contaminated, thereby achieving efficient maintenance and reducing maintenance costs.
[0047] In addition, by directly assembling the encoder housing 13 and the encoder cover 14, the gaps between the encoder components can be reduced, thereby improving the heat dissipation efficiency of the encoder body and the encoder bearing, and improving the reliability and life of the encoder assembly 1.
[0048] Finally, by adopting an assembly method in which the axial positioning and the radial positioning are separated, the cumulative error can be reduced, and the concentricity between the encoder assembly 1 and the motor shaft 21 can be improved, thereby further improving the reliability of the operation of the encoder assembly 1.
[0049] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.
Claims
1. Encoder assembly, including: The encoder housing (13) and the encoder cover (14) are characterized in that: The encoder housing (13) has a first flange structure, and the first flange structure has a first mounting end surface (131) on a side facing the encoder cover (14); The encoder cover (14) has a second mounting end surface (141) on a side facing the encoder housing (13); The first mounting end surface (131) and the second mounting end surface (141) are capable of contacting each other and being connected together via a connecting piece; The first flange structure has an annular positioning platform (132) on a side away from the encoder cover (14); when the encoder assembly is assembled on a motor (2), the annular positioning platform (132) cooperates with an axial hole (221) on a rear end cover (22) of the motor (2) to achieve radial positioning of the encoder assembly; The encoder cover (14) has a second flange structure, and the second flange structure has a third mounting end face (142) on the side facing the rear end cover (22). When the encoder assembly is assembled on the motor (2), the third mounting end face (142) contacts a fourth mounting end face (222) on the rear end cover (22) of the motor (2) and can be connected together through a connecting piece to achieve axial positioning of the encoder assembly.
2. The encoder assembly according to claim 1, characterized in that The first connecting member is a screw, a buckle or a locking member; the second connecting member is a screw, a buckle or a locking member.
3. The encoder assembly of claim 1 , further comprising: PCB (12); characterized in that, before the PCB (12) is installed in the encoder housing (13) and the encoder cover (14) is installed, a heat dissipation material is arranged on the PCB (12); when the first installation end surface (131) and the second installation end surface (141) are connected, the encoder cover (14) squeezes the heat dissipation material so that the heat dissipation material fully fills the space between the PCB (12) and the encoder cover (14).
4. The method for assembling an encoder assembly according to any one of claims 1 to 3, characterized in that: include: Assembling a PCB (12) into an encoder housing (13); Aligning and connecting the second mounting end surface (141) of the encoder cover (14) and the first mounting end surface (131) of the encoder housing (13); For the assembled encoder assembly, radial positioning of the encoder assembly on the motor (2) is achieved by matching the annular positioning platform (132) of the encoder housing (13) with the shaft hole (221) of the rear end cover (22) of the motor (2); Axial positioning and installation of the encoder assembly on the motor (2) is achieved by bringing a third mounting end surface (142) on the encoder cover (14) into contact with and connecting a fourth mounting end surface (222) of a rear end cover (22) of the motor (2).
5. The method for assembling an encoder assembly according to claim 4, characterized in that: Said include: Before aligning and connecting the second mounting end surface (141) of the encoder cover (14) with the first mounting end surface (131) of the encoder housing (13), the method further comprises: arranging a heat dissipation material on the PCB (12); When the second mounting end surface (141) of the encoder cover (14) is aligned with and connected to the first mounting end surface (131) of the encoder housing (13), the encoder cover (14) squeezes the heat dissipation material so that the heat dissipation material fully fills the space between the PCB (12) and the encoder cover (14).