Ultrathin encoder
By designing the convex ring and bearing lap structure in the encoder to eliminate the play, and combining adjustment and locking mechanisms, the precise alignment and thickness of the encoder are achieved, solving the problem of encoder accuracy and thickness, and improving the The overall performance of the encoder.
Patent Information
- Application Number
- CN202421175645.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-05-28
AI Technical Summary
The measured values of existing encoders are prone to deviations in the bearing clearance phenomenon, resulting in low accuracy, large encoder thickness and low adjustment efficiency.
An ultra-thin encoder is designed to fix the convex ring on the side of the cylindrical sleeve component, and the lap structure of the upper bearing and the lower bearing are used to eliminate the play, and combine the adjustment mechanism and the locking mechanism to ensure the accuracy of the code disc and PCB board. Align to reduce encoder thickness.
It effectively eliminates bearing clearance, improves the accuracy and adjustment efficiency of the encoder, reduces the encoder thickness, and is suitable for a wider range of application scenarios.
Smart Images
Figure CN222353215U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motor encoders, in particular to an ultra-thin encoder. Background Art
[0002] An encoder is a device that compiles and converts signals (such as bit streams) or data into a signal form that can be used for communication, transmission and storage. The encoder converts angular displacement or linear displacement into electrical signals. The former is called a code disk and the latter is called a code scale. According to the readout method, encoders can be divided into contact and non-contact types; according to the working principle, encoders can be divided into incremental and absolute types. The incremental encoder converts the displacement into a periodic electrical signal, and then converts this electrical signal into a counting pulse, and the number of pulses is used to represent the size of the displacement. Each position of the absolute encoder corresponds to a certain digital code, so its indication is only related to the starting and ending positions of the measurement, but not to the intermediate process of the measurement.
[0003] As an important component of servo motors or stepper motors, the encoder is an indispensable accessory in production. Its accuracy and stability are crucial to the performance of the entire system. In practical applications, bearing clearance is inevitable. Bearing clearance refers to the relative displacement caused by the gap between the inner and outer rings of the bearing during rotation. This clearance phenomenon will cause deviations in the encoder's measurement value, thereby affecting the accuracy of the entire system.
[0004] In view of the bearing clearance phenomenon, some technologies have been used to reduce the clearance and improve the accuracy of the encoder by optimizing the bearing structure, using new materials or adjusting the preload. However, these methods often need to sacrifice the size or cost of the encoder to achieve, so the thickness of the existing encoder is still very large, basically between 20mm and 30mm. At the same time, the code disk, PCB board, sensor and light source of the existing encoder and its main components are placed on the same side of the frame. This method is very inefficient when adjusting the encoder so that the code disk and sensor can be accurately aligned with the code channel.
[0005] Therefore, it is necessary to improve the deficiencies in the prior art to solve the above problems. Utility Model Content
[0006] The utility model overcomes the shortcomings of the prior art and provides an ultra-thin encoder.
[0007] In order to achieve the above object, the technical solution adopted by the utility model is: an ultra-thin encoder, comprising:
[0008] an upper end member and a lower end member;
[0009] A positioning member, used to ensure concentricity between the upper end member and the lower end member;
[0010] A cylindrical sleeve component is coaxially arranged with the upper component and the lower component and is located inside the upper component and the lower component. An axial hole component for mounting the cylindrical sleeve component on the motor shaft is provided on the inner side of the cylindrical sleeve component. A convex ring for positioning the code disk is fixed on the side of the cylindrical sleeve component.
[0011] An upper bearing, wherein the inner ring side surface of the upper bearing is fixed to the side surface of the cylindrical sleeve component, and the inner ring bottom of the upper bearing overlaps the top of the convex ring;
[0012] A lower bearing, wherein the inner ring side surface of the lower bearing is fixed to the side surface of the cylindrical sleeve component, and the inner ring top of the lower bearing overlaps the bottom of the convex ring;
[0013] The raised component is used to support and hold the outer ring of the lower bearing in place and is located at the inner wall where the lower end component is connected to the outer ring of the lower bearing.
[0014] In a preferred embodiment of the utility model, the bottom of the raised component is flush with the bottom of the lower end component, the inner diameter of the raised component is smaller than the inner side of the lower end component, the outer ring side surface of the lower bearing is clamped with the inner wall of the lower end component, the bottom of the outer ring of the lower bearing overlaps with the top of the raised component, and the outer ring side surface of the upper bearing is bonded and fixed to the inner wall of the upper end component.
[0015] In a preferred embodiment of the utility model, the top of the outer edge of the convex ring is fixed to the bottom of the code disc, and the code disc is coaxially arranged with the cylindrical sleeve component.
[0016] In a preferred embodiment of the utility model, the upper end component is concave, a PCB board is installed on the inner side of the upper end component, an adjustment mechanism for adjusting the concentricity of the PCB board and the code disk is provided on the side of the upper end component, the end face of the lower end component is thickened to strengthen the structure and adjust the center of gravity of the encoder, and a locking mechanism for fixing the position of the upper end component and the lower end component after being fitted together is provided between the upper end component and the lower end component.
[0017] In a preferred embodiment of the utility model, the adjustment mechanism includes: a plurality of first countersunk holes circumferentially opened on the side surface of the upper end component, and a plurality of adjustment screws threadedly connected to the inner sides of the first countersunk holes; the first countersunk holes pass through to the inner side of the upper end component, one end of the adjustment screw contacts the side surface of the PCB board, and an observation port is opened on the top of the upper end component for observing the position of the PCB board relative to the code disk.
[0018] In a preferred embodiment of the utility model, the locking mechanism includes: a plurality of locking columns protruding toward the inner side of the upper end component, a plurality of second countersunk holes provided at the top of the upper end component, and a plurality of locking screws threadedly connected to the inner sides of the plurality of second countersunk holes; the plurality of locking columns are evenly distributed circumferentially on the inner side of the upper end component, the number of the second countersunk holes and the locking screws and their distribution are the same as the number of the locking columns and their distribution, and the second countersunk holes pass through from the top of the upper end component downward to the locking columns and the lower end component in sequence.
[0019] In a preferred embodiment of the utility model, a mounting groove is provided at the bottom of the lower end component, the mounting groove passes through to the interior of the lower end component, a light source is installed on the inner side of the mounting groove, a circuit board for installing the light source is provided at the bottom of the lower end component, the light source is fixed on one side of the circuit board, a plurality of third countersunk holes are provided on the surface of the circuit board and the bottom of the lower end component, and a plurality of fastening screws are threadedly connected to the inner sides of the third countersunk holes for fixing the circuit board to the bottom of the lower end component.
[0020] In a preferred embodiment of the utility model, a connecting groove is provided at the bottom of the lower end component, a leaf spring is installed at the bottom of the lower end component, the top sheet of the leaf spring is located on the inner side of the connecting groove, a plurality of connecting holes are provided on the surface of the leaf spring bottom sheet and the bottom of the lower end component, and a plurality of connecting screws are threadedly connected to the inner sides of the connecting holes for fixing the leaf spring to the bottom of the lower end component.
[0021] In a preferred embodiment of the utility model, the shaft hole component includes: a lower shaft hole opened at the bottom of the cylindrical shaft sleeve component for installing the motor shaft, and an upper shaft hole opened at the top of the cylindrical shaft sleeve component for locking the encoder to one end of the motor shaft by a locking screw; the interiors of the lower shaft hole and the upper shaft hole are connected, and the top of the upper shaft hole is provided with a fourth countersunk hole for carrying the head of the locking screw.
[0022] In a preferred embodiment of the utility model, the inner diameter of the lower shaft hole is larger than the inner diameter of the upper shaft hole, and the inner wall of the upper shaft hole is a smooth hole or a hole with internal threads.
[0023] The utility model solves the defects existing in the background technology, and has the following
[0024] Beneficial effects:
[0025] (1) The utility model provides an ultra-thin encoder, which fixes a convex ring on the side of a cylindrical sleeve component. When the cylindrical sleeve component, the upper bearing and the lower bearing are coaxially installed inside the upper end component and the lower end component, the outer ring of the lower bearing can be supported and positioned through the cooperation of the convex component. Since the bottom of the inner ring of the upper bearing overlaps with the top of the convex ring, and the top of the inner ring of the lower bearing overlaps with the bottom of the convex ring, after an external force is applied to the top of the outer ring of the upper bearing, the inner side of the outer ring of the upper bearing can form a contact point with the position of the ball near the top, and the position of the ball near the bottom will contact the upper shaft. A contact point is formed on the inner side of the inner ring of the bearing and is transmitted to the lower bearing with the cooperation of the convex ring, so that the contact points of the inner ring and outer ring of the lower bearing with the ball are opposite to those of the upper bearing, and the downward pressure is transmitted to the contact surface between the outer ring of the lower bearing and the raised component. It is only necessary to fix the outer ring of the upper bearing and the inner wall of the upper end component to maintain the close contact between the inner and outer rings of the upper and lower bearings and the ball. During the rotation process, the relative displacement caused by the gap between the inner and outer rings and the ball is avoided, the clearance phenomenon is eliminated, and the measurement value of the encoder will not deviate, thereby improving the accuracy of the encoder.
[0026] (2) In the utility model, an adjustment mechanism is provided on the side of the upper component, and the concentricity of the code disk, the cylindrical sleeve component, the upper component and the lower component is ensured by the coaxial arrangement. When the PCB board is located on the inner side of the upper component, through the cooperation of a plurality of first countersunk holes and a plurality of adjusting screws, since the plurality of first countersunk holes are circumferentially opened on the side of the upper component, and one end of the adjusting screw is in contact with the side of the PCB board, it is only necessary to slightly screw the adjusting screws at different positions into or out of the interior of the upper component. During adjustment, the displacement of the PCB board relative to the code disk can be observed by an external microscope through the cooperation of the observation port, and can also be observed by detecting light signals, so that a slight displacement of the PCB board can be achieved, so that it can gradually approach and finally be accurately aligned with the code disk, thereby simplifying the alignment process with the code disk and achieving efficient and accurate alignment of the code channel.
[0027] (3) In the present invention, the bottom of the code disk is fixed to the top of the outer edge of the convex ring. In terms of structural distribution, the upper bearing is located at the top of the convex ring and the lower bearing is located at the bottom of the convex ring. Since the upper end component is concave, the PCB board can be installed inside the upper end component and close to the inner side of the end face. At the same time, the light source is installed through the mounting groove and extends into the interior of the lower end component, which effectively reduces the axial size of the encoder. By embedding the top plate of the leaf spring into the bottom of the lower end component through the connecting groove, the thickness of the end face of the lower end component is fully and effectively utilized, that is, the height of the encoder itself is effectively controlled, and the overall height of the connection between the encoder and the leaf spring is effectively reduced, so that the overall thickness of the encoder can reach about 9 mm. Compared with the encoder in the prior art, the thickness can be reduced by more than 30%, thereby achieving a wider range of application scenarios.
[0028] (4) In the utility model, a plurality of locking columns protruding inward are provided on the inner side of the upper component. Since the second countersunk hole passes through from the top of the upper component downward to the locking column and the lower component in sequence, the upper component and the lower component can be easily installed or disassembled with the cooperation of the locking screw. Moreover, by providing a third countersunk hole at the bottom of the circuit board and the lower component, the circuit board and its light source can be easily installed or disassembled with the cooperation of the fastening screw. At the same time, the locking column, the second countersunk hole and the third countersunk hole are all connected in a concealed manner, which ensures that they can be easily disassembled and replaced during maintenance and protects the internal components. At the same time, with the cooperation of the lower shaft hole, the upper shaft hole and the fourth countersunk hole, the motor shaft can be inserted into the lower shaft hole, and the locking screw can be used to quickly lock or disassemble the motor shaft and the encoder, thereby improving the convenience during maintenance. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0030] Figure 1 It is a three-dimensional structural diagram of an encoder of a preferred embodiment of the utility model;
[0031] Figure 2 This is a diagram of the overall separation structure of the encoder of the preferred embodiment of the utility model;
[0032] Figure 3 It is a half-section structure diagram of an encoder of a preferred embodiment of the utility model;
[0033] Figure 4 It is a half-section structural diagram of the connection between the cylindrical sleeve component and the upper bearing and the lower bearing of the preferred embodiment of the utility model;
[0034] Figure 5 It is a three-dimensional structural diagram of the connection between the upper end component and the PCB board of the preferred embodiment of the utility model;
[0035] Figure 6 This is a distribution structure diagram of a preferred embodiment of the utility model in which the first countersunk hole is located on the inner side of the upper end component;
[0036] Figure 7 This is a structural diagram of the separation of the lower end component, the light source and the leaf spring of the preferred embodiment of the utility model;
[0037] Figure 8It is a half-section structural diagram of the connection between the shaft hole component and the motor shaft of the preferred embodiment of the utility model;
[0038] In the figure: 1. upper part; 2. lower part; 3. cylindrical sleeve part; 4. code disk; 5. convex ring; 6. upper bearing; 7. lower bearing; 8. raised part; 9. PCB board; 10. first countersunk hole; 11. observation port; 12. locking column; 121. second countersunk hole; 13. mounting slot; 131. light source; 132. circuit board; 133. third countersunk hole; 14. connecting slot; 141. leaf spring; 142. connecting hole; 15. lower shaft hole; 151. upper shaft hole; 152. fourth countersunk hole. DETAILED DESCRIPTION
[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0040] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.
[0041] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application 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 limiting the scope of protection of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention of the present utility model, unless otherwise specified, "multiple" means two or more.
[0042] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.
[0043] like Figure 1 , Figure 2 and Figure 3 As shown, an ultra-thin encoder comprises: an upper component 1 and a lower component 2; a positioning member (not shown in the figure), which is used to ensure the concentricity between the upper component 1 and the lower component 2; a cylindrical sleeve component 3, which is coaxially arranged with the upper component 1 and the lower component 2 and is located inside the upper component 1 and the lower component 2, and the inner side of the cylindrical sleeve component 3 is provided with an axial hole component for installing the cylindrical sleeve component 3 on the motor shaft, and the side of the cylindrical sleeve component 3 is fixed with a convex ring 5 for positioning the code disk 4; an upper bearing 6, the inner ring side of the upper bearing 6 is fixed to the side of the cylindrical sleeve component 3, and the bottom of the inner ring of the upper bearing 6 overlaps with the top of the convex ring 5; a lower bearing 7, the inner ring side of the lower bearing 7 is fixed to the side of the cylindrical sleeve component 3, and the inner ring top of the lower bearing 7 overlaps with the bottom of the convex ring 5; a raised component 8, which is used to support and clamp the outer ring of the lower bearing 7, and is located at the inner wall where the lower component 2 is connected to the outer ring of the lower bearing 7.
[0044] It should be noted that the bottom of the raised component 8 is flush with the bottom of the lower end component 2, the inner diameter of the raised component 8 is smaller than the inner side of the lower end component 2, the outer ring side of the lower bearing 7 is clamped with the inner wall of the lower end component 2, the outer ring bottom of the lower bearing 7 overlaps with the top of the raised component 8, and the outer ring side of the upper bearing 6 is bonded and fixed to the inner wall of the upper end component 1. The raised component 8 controls the distance between the code disk 4 and the inner end face of the lower end component 2 by limiting the outer ring position of the lower bearing 7 and cooperating with the structural design of the cylindrical sleeve component 3, thereby realizing the control of the overall height of the encoder and minimizing the height of the encoder. The thickness of the encoder as a whole machine, and by utilizing the end face thickness, the position adjustment of the raised component 8 is convenient, and bearings of different heights are effectively matched. The raised component 8 not only supports the outer ring of the lower bearing 7, but also holds the lower bearing 7 in place, which is convenient for the assembly of the whole machine, optimizes the assembly process of the whole machine, and facilitates the elimination of the clearance between the upper bearing 6 and the lower bearing 7; the shapes of the upper end component 1 and the lower end component 2 are preferably circular hollow structures; the side of the outer ring of the upper bearing 6 and the inner side of the upper end component 1, as well as the inner side of the convex ring 5 and the side of the cylindrical bearing sleeve component are preferably connected by bonding.
[0045] More specifically, the principle of eliminating the clearance between the upper bearing 6 and the lower bearing 7 is as follows: Figure 3 As shown by the arrows in the figure, after the cylindrical sleeve component 3, the upper bearing 6 and the lower bearing 7 are coaxially installed inside the upper end component 1 and the lower end component 2, the bottom of the outer ring of the lower bearing 7 is overlapped on the top of the raised component 8, and the side of the outer ring of the lower bearing 7 is clamped on the inner side of the lower end component 2, an external force is applied to the top of the outer ring of the upper bearing 6, and the outer ring of the upper bearing 6 transmits downward pressure downward, so that the inner side of the outer ring of the upper bearing 6 forms a contact point with the position of the ball near the top. Under the action of the downward pressure, the position of the ball near the bottom forms a contact point with the inner side of the inner ring of the upper bearing 6, and the downward pressure will continue to be transmitted downward to the contact surface between the inner ring of the upper bearing 6 and the top of the convex ring 5, and will continue to be transmitted downward from the contact surface between the bottom of the convex ring 5 and the top of the inner ring of the lower bearing 7 to the inner ring of the lower bearing 7. After the downward pressure is applied, a contact point is formed between the inner side of the inner ring of the lower shaft and the position of the ball near the top. Under the action of the downward pressure, the position of the ball near the bottom forms a contact point with the inner side of the outer ring of the lower shaft. The downward pressure will continue to be transmitted downward to the contact surface between the outer ring of the lower bearing 7 and the raised component 8, and the raised component 8 will bear the downward pressure. At the same time, the inner sides of the upper bearing 6, the lower bearing 7 and the convex ring 5 are bonded and fixed to the side of the cylindrical bearing sleeve component, and the side of the upper bearing 6 is bonded and fixed to the inner side of the upper end component 1, so that the inner and outer rings of the upper bearing 6 and the lower bearing 7 can be kept in close contact with the ball. In the rotation process, the relative displacement caused by the gap between the inner and outer rings and the ball is avoided, the clearance phenomenon is eliminated, and the measurement value of the encoder will not deviate, thereby improving the accuracy of the encoder.
[0046] In some embodiments, the positioning member includes: positioning holes provided on the upper component 1 and the lower component 2 for cooperating with each other to ensure the concentricity of the two components, and positioning columns cooperating with the positioning holes;
[0047] or
[0048] A positioning male head provided on the upper part 1 and the lower part 2 for cooperating with each other to ensure the concentricity of the two parts, and a positioning female head cooperating with the positioning male head;
[0049] or
[0050] The upper component 1 and the lower component 2 are provided with arc surfaces for cooperating with each other to ensure the concentricity of the two components, and the positioning surfaces are matched with the arc surfaces.
[0051] like Figure 4 As shown, in some embodiments, the top of the outer edge of the convex ring 5 is fixed to the bottom of the code disc 4, and the code disc 4 is coaxially arranged with the cylindrical sleeve component 3; the convex ring 5 can position and limit the height of the axial installation of the code disc 4, and position the code disc 4 radially, so as to effectively protect the code disc 4 and facilitate the adjustment of the concentricity of the code disc 4.
[0052] like Figure 5and Figure 6 As shown, in some embodiments, the upper component 1 is concave, a PCB board 9 is installed on the inner side of the upper component 1, an adjustment mechanism for adjusting the concentricity of the PCB board 9 and the code disk 4 is provided on the side of the upper component 1, and the end face of the lower component 2 is thickened to strengthen the structure and adjust the center of gravity of the encoder, and a locking mechanism is provided between the upper component 1 and the lower component 2 for fixing the position of the upper component 1 and the lower component 2 after being fitted together.
[0053] It should be noted that, since the upper component 1 is concave, the PCB board 9 can be installed inside the upper component 1 and close to the inner side of the end surface, and the side of the PCB board 9 with electronic components faces the bottom of the upper component 1.
[0054] In some embodiments, the adjustment mechanism includes: a plurality of first countersunk holes 10 circumferentially opened on the side of the upper component 1, and a plurality of adjustment screws (not shown in the figure) threadedly connected to the inner sides of the plurality of first countersunk holes 10; the first countersunk holes 10 pass through the inner side of the upper component 1, one end of the adjustment screw contacts the side of the PCB board 9, and an observation port 11 is opened on the top of the upper component 1 for observing the position of the PCB board 9 relative to the code disk 4.
[0055] It should be noted that the distribution of the first countersunk holes 10 on the side of the upper component 1 is preferably uniformly distributed in the circumferential direction, and the number of the first countersunk holes 10 and the adjusting screws is preferably three, so as to form a three-point contact with the PCB board 9, which is convenient for adjusting the position of the PCB board 9, and the inner side of the first countersunk holes 10 and the adjusting screws have fine threads; when the PCB board 9 is located on the inner side of the upper component 1, the three adjusting screws are screwed into the three first countersunk holes 10, and one end of the three adjusting screws located inside the upper component 1 is made to contact the side of the PCB board 9, and an external microscope can be used to observe the code channel offset of the PCB board 9 and the code disk 4 through the observation port 11, or the light signal detection method can be used for observation, and the adjusting screws at different positions only need to be slightly screwed in or out of the inner part of the upper component 1 to push the PCB board 9 to move relative to the code disk 4, so as to achieve a slight displacement of the PCB board 9, so that it can gradually approach and finally accurately align with the code disk 4, simplifying the alignment process with the code disk 4, and achieving efficient and accurate alignment of the code channel.
[0056] In some embodiments, the PCB board 9 is installed in a manner that a key slot is opened at the top of the upper component 1. When the PCB board 9 completes the concentricity adjustment using the adjustment mechanism, one end of a plurality of adjustment screws contacts the side of the PCB board 9. Through the setting of the key slot, glue can be dispensed into the key slot and the inside of the observation port 11 respectively. When the glue is cured, the adjusted PCB board 9 can be fixed on the inner side of the upper component 1. Compared with the prior art, after the PCB board 9 is fixed only by connection methods such as screws, when the encoder rotates, due to vibration, it is easy to cause a slight offset of the PCB board 9, thereby invalidating the adjusted accuracy and affecting the accuracy of the encoder. The utility model uses a plurality of adjustment screws to fix the adjusted PCB board, and at the same time reinforces it by dispensing glue, so that after the PCB board 9 is adjusted, the position of the PCB board 9 will not be offset due to vibration, thereby greatly improving the accuracy of the encoder.
[0057] In some embodiments, the locking mechanism includes: a plurality of locking columns 12 protruding toward the inner side of the upper end component 1, a plurality of second countersunk holes 121 opened at the top of the upper end component 1, and a plurality of locking screws (not shown in the figure) threadedly connected to the inner sides of the second countersunk holes 121; the plurality of locking columns 12 are evenly distributed circumferentially on the inner side of the upper end component 1, the number and distribution of the second countersunk holes 121 and the locking screws are the same as the number and distribution of the locking columns 12, and the second countersunk holes 121 pass through from the top of the upper end component 1 downward to the locking columns 12 and the lower end component 2 in sequence.
[0058] It should be noted that, by the locking column 12 protruding toward the inner side of the upper component 1, and the docking hole being the second countersunk hole 121, a hidden connection is performed, which fully utilizes the internal space of the upper component 1 and the lower component 2. Since the second countersunk hole 121 passes through from the top of the upper component 1 downward to the locking column 12 and the lower component 2 in sequence, when the upper component 1 and the lower component 2 are concentrically aligned, a number of locking screws are threadedly connected from the top of the upper component 1, and the upper component 1 penetrates into the locking column 12 and then into the lower component 2 to complete the installation between the upper component 1 and the lower component 2.
[0059] like Figure 7 As shown, in some embodiments, a mounting groove 13 is provided at the bottom of the lower end component 2, and the mounting groove 13 passes through the interior of the lower end component 2. A light source 131 is installed on the inner side of the mounting groove 13, and a circuit board 132 for installing the light source 131 is provided at the bottom of the lower end component 2. The light source 131 is fixed on one side of the circuit board 132. A plurality of third countersunk holes 133 are provided on the surface of the circuit board 132 and the bottom of the lower end component 2. A plurality of fastening screws (not shown in the figure) are threadedly connected to the inner sides of the plurality of third countersunk holes 133 for fixing the circuit board 132 to the bottom of the lower end component 2.
[0060] It should be noted that a concealed connection is performed by using the docking hole as the third countersunk hole 133. After the light source 131 is fixedly installed on one side of the circuit board 132, the light source 131 is inserted into the inner side of the mounting groove 13 so that it faces the inner side of the lower end component 2. After the third countersunk hole 133 on the circuit board 132 is aligned with the third countersunk hole 133 at the bottom of the lower end component 2, the fastening screws are threadedly connected through the third countersunk hole 133 on the surface of the circuit board 132, and the circuit board 132 is inserted into the lower end component 2 to complete the installation of the circuit board 132 and its light source 131.
[0061] In some embodiments, a connecting groove 14 is provided at the bottom of the lower end component 2, and a leaf spring 141 is installed at the bottom of the lower end component 2. The top plate of the leaf spring 141 is located on the inner side of the connecting groove 14, and a plurality of connecting holes 142 are provided on the surface of the bottom plate of the leaf spring 141 and the bottom of the lower end component 2. A plurality of connecting screws (not shown in the figure) are threadedly connected to the inner sides of the plurality of connecting holes 142 for fixing the leaf spring 141 to the bottom of the lower end component 2.
[0062] It should be noted that the leaf spring 141 is used to install the encoder to the working position; after the top piece of the leaf spring 141 is placed on the inner side of the connecting groove 14, the several connecting holes 142 on the bottom piece of the leaf spring 141 are aligned with the several connecting holes 142 at the bottom of the lower end component 2, and the connecting screws are threadedly connected through the connecting holes 142 on the bottom piece of the leaf spring 141, and the bottom piece of the leaf spring 141 penetrates into the lower end component 2 to complete the installation of the leaf spring 141; at the same time, after the top piece of the leaf spring 141 is placed on the inner side of the connecting groove 14, it not only plays the role of embedding to reduce the thickness, but also has a limiting effect on the top piece of the leaf spring 141 as a whole, and then when it is installed in the working position through the leaf spring 141, the leaf spring 141 and the encoder will not be offset due to the gap at the connection, thereby improving the stability of the connection.
[0063] like Figure 4 As shown, in some embodiments, the shaft hole component includes: a lower shaft hole 15 opened at the bottom of the cylindrical sleeve component 3 for installing the motor shaft, and an upper shaft hole 151 opened at the top of the cylindrical sleeve component 3 for locking the encoder to one end of the motor shaft by a locking screw; the lower shaft hole 15 and the upper shaft hole 151 are internally connected, and the top of the upper shaft hole 151 is provided with a fourth countersunk hole 152 for supporting the head of the locking screw.
[0064] It should be noted that a threaded connection hole 142 is provided at one end of the motor shaft; when installing the encoder, the motor shaft is inserted into the inner side of the lower shaft hole 15, and the locking screw is used to penetrate into the upper shaft hole 151, and one end of the motor shaft is threadedly connected to the threaded connection hole 142 at one end of the motor shaft, and the installation of the encoder can be completed (such as Figure 8As shown), the fourth countersunk hole 152 can be used to hide the head of the locking screw.
[0065] In some embodiments, the inner diameter of the lower shaft hole 15 is larger than the inner diameter of the upper shaft hole 151 , and the inner wall of the upper shaft hole 151 is a smooth hole or a hole with internal threads.
[0066] Specifically, when the inner wall of the upper shaft hole 151 is a light hole, in the process of removing the encoder as a whole from the motor shaft, the locking screw connected to one end of the motor shaft is unscrewed and removed, and the operator needs to hold the encoder and pull it in the opposite direction of the motor shaft. When pulling, the force point transmitted upward will pass through the upper bearing 6 and the lower bearing 7, further driving the cylindrical sleeve component 3 to move upward, so that one end of the motor shaft is taken out from the inner side of the lower shaft hole 15.
[0067] Preferably, when the inner wall of the upper shaft hole 151 is a hole with internal threads, in the process of removing the encoder as a whole from the motor shaft, the locking screw connected to one end of the motor shaft is unscrewed and removed, and only the screw that is compatible with the internal thread of the upper shaft hole 151 needs to be screwed into the upper shaft hole 151 and screwed downward until the bottom end contacts one end of the motor shaft. When the screw continues to be screwed downward, the cylindrical sleeve component 3 will move upward along the screw to achieve the effect of ejecting the encoder from the motor shaft, so that the upward force is transmitted through the cylindrical sleeve component 3, avoiding damage to the upper bearing 6 and the lower bearing 7.
[0068] In terms of structural distribution, the utility model makes the upper bearing 6 located at the top of the convex ring 5, and the lower bearing 7 located at the bottom of the convex ring 5. Since the upper end component 1 is concave, the PCB board 9 can be installed inside the upper end component 1 and close to the inner side of the end face. At the same time, the light source 131 is installed through the mounting groove 13 to extend into the interior of the lower end component 2, which effectively reduces the axial size of the encoder. By embedding the top plate of the leaf spring 141 into the bottom of the lower end component 2 through the connecting groove 14, the thickness of the end face of the lower end component 2 is fully and effectively utilized, that is, the height of the encoder itself is effectively controlled, and the overall height of the connection between the encoder and the leaf spring 141 is effectively reduced, so that the overall thickness of the encoder can reach about 9 mm. Compared with the encoder in the prior art, the thickness can be reduced by more than 30%, thereby achieving a wider range of application scenarios.
[0069] The above is based on the ideal embodiment of the utility model as inspiration. Through the above description, it is obvious to those skilled in the art that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model. Any figure mark in the claims should not be regarded as limiting the claims involved.
[0070] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. An ultra-thin encoder, characterized in that: include: an upper end member and a lower end member; A positioning member, used to ensure concentricity between the upper end member and the lower end member; A cylindrical sleeve component is coaxially arranged with the upper component and the lower component and is located inside the upper component and the lower component. An axial hole component for mounting the cylindrical sleeve component on the motor shaft is provided on the inner side of the cylindrical sleeve component. A convex ring for positioning the code disk is fixed on the side of the cylindrical sleeve component. An upper bearing, wherein the inner ring side surface of the upper bearing is fixed to the side surface of the cylindrical sleeve component, and the inner ring bottom of the upper bearing overlaps the top of the convex ring; A lower bearing, wherein the inner ring side surface of the lower bearing is fixed to the side surface of the cylindrical sleeve component, and the inner ring top of the lower bearing overlaps the bottom of the convex ring; The raised component is used to support and hold the outer ring of the lower bearing in place and is located at the inner wall where the lower end component is connected to the outer ring of the lower bearing.
2. The ultra-thin encoder according to claim 1, characterized in that: The bottom of the raised component is flush with the bottom of the lower end component, the inner diameter of the raised component is smaller than the inner side of the lower end component, the outer ring side of the lower bearing is clamped with the inner wall of the lower end component, the bottom of the outer ring of the lower bearing overlaps with the top of the raised component, and the outer ring side of the upper bearing is bonded and fixed to the inner wall of the upper end component.
3. The ultra-thin encoder according to claim 1, characterized in that: The top of the outer edge of the convex ring is fixed to the bottom of the code disc, and the code disc is coaxially arranged with the cylindrical sleeve component.
4. The ultra-thin encoder according to claim 1, characterized in that: The upper component is concave, and a PCB board is installed on the inner side of the upper component. An adjustment mechanism for adjusting the concentricity of the PCB board and the code disk is provided on the side of the upper component. The end face of the lower component is thickened to strengthen the structure and adjust the center of gravity of the encoder. A locking mechanism is provided between the upper component and the lower component to fix the position of the upper component and the lower component after they are fitted together.
5. The ultra-thin encoder according to claim 4, characterized in that: The adjustment mechanism includes: a plurality of first countersunk holes circumferentially opened on the side surface of the upper end component, and a plurality of adjustment screws threadedly connected to the inner sides of the first countersunk holes; the first countersunk holes pass through to the inner side of the upper end component, one end of the adjustment screw contacts the side surface of the PCB board, and an observation port is opened on the top of the upper end component for observing the position of the PCB board relative to the code disk.
6. The ultra-thin encoder according to claim 4, characterized in that: The locking mechanism includes: a plurality of locking columns protruding toward the inner side of the upper end component, a plurality of second countersunk holes provided at the top of the upper end component, and a plurality of locking screws threadedly connected to the inner sides of the plurality of second countersunk holes; the plurality of locking columns are evenly distributed circumferentially on the inner side of the upper end component, the number and distribution of the second countersunk holes and the locking screws are the same as the number and distribution of the locking columns, and the second countersunk holes are sequentially passed from the top of the upper end component downward to the locking columns and the lower end component.
7. The ultra-thin encoder according to claim 1, characterized in that: A mounting groove is provided at the bottom of the lower end component, and the mounting groove passes through the interior of the lower end component. A light source is installed on the inner side of the mounting groove. A circuit board for installing the light source is provided at the bottom of the lower end component, and the light source is fixed on one side of the circuit board. A plurality of third countersunk holes are provided on the surface of the circuit board and the bottom of the lower end component, and a plurality of fastening screws are threadedly connected to the inner sides of the third countersunk holes for fixing the circuit board to the bottom of the lower end component.
8. The ultra-thin encoder according to claim 1, characterized in that: A connecting groove is provided at the bottom of the lower end component, a leaf spring is installed at the bottom of the lower end component, the top plate of the leaf spring is located on the inner side of the connecting groove, a plurality of connecting holes are provided on the surface of the leaf spring bottom plate and the bottom of the lower end component, and a plurality of connecting screws are threadedly connected to the inner sides of the connecting holes for fixing the leaf spring to the bottom of the lower end component.
9. The ultra-thin encoder according to claim 1, characterized in that: The shaft hole component includes: a lower shaft hole opened at the bottom of the cylindrical sleeve component for installing the motor shaft, and an upper shaft hole opened at the top of the cylindrical sleeve component for locking the encoder to one end of the motor shaft by a locking screw; the lower shaft hole and the upper shaft hole are internally connected, and the top of the upper shaft hole is provided with a fourth countersunk hole for carrying the head of the locking screw.
10. The ultra-thin encoder according to claim 9, characterized in that: The inner diameter of the lower shaft hole is larger than the inner diameter of the upper shaft hole, and the inner wall of the upper shaft hole is a smooth hole or a hole with internal threads.