A stepper motor rotor tooth profile staggered tooling

Abstract

This utility model discloses a rotor tooth misalignment fixture for a stepper motor, relating to the field of rotor assembly technology. It includes a base plate, a fixed toothed seat block mounted on the top surface of the base plate, a detachable fixed toothed seat on the top surface of the fixed toothed seat block, and a slide rail fixedly connected to the top surface of the base plate. A movable toothed seat, cooperating with the fixed toothed seat, is slidably mounted above the slide rail. A semi-circular groove is formed at one end of the contact point between the fixed toothed seat and the movable toothed seat, and the two semi-circular grooves form a circular groove for surrounding the rotor laminations. This utility model, by providing a fixed toothed seat and a movable toothed seat cooperating with the fixed toothed seat on the base plate, both equipped with misalignment components for adjusting the angle of stacked rotor laminations, allows for more precise control of the included angle of the stacked rotor laminations compared to visually controlling the angle of the stacked rotor laminations' teeth. This avoids rework processes and improves production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of rotor assembly technology, and in particular to a rotor tooth profile misalignment tooling for a stepper motor. Background Technology

[0002] When assembling a hybrid stepper motor rotor, two identical stacked toothed rotor laminations are typically fixed together. The teeth of the rotor laminations must be staggered by an angle, which is half the included angle between any two adjacent teeth on the rotor lamination. After fixing, a mounting cylinder (one end of the mounting cylinder is a thick cylinder, and the other end is a thin cylinder; the thick cylinder is pressed into the socket hole of the rotor lamination) needs to be stamped.

[0003] In existing manufacturing processes, the included angle of the teeth of two rotor laminations is often observed visually. However, it is difficult to control the accuracy by relying on the naked eye. If the angle error of the misalignment of the teeth of the two rotor laminations is large, it will seriously affect the normal operation of the motor, causing a decrease in output, loud motor noise, imbalance, or even motor failure. At this time, it is necessary to readjust the angle of the rotor lamination teeth, which will increase the assembly time and thus affect the overall production efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a rotor tooth misalignment tooling for a stepper motor, in order to solve the problem mentioned in the background art that the existing two stacked rotor laminations are misaligned at an angle that is observed by the naked eye, resulting in inaccurate installation precision and causing the assembled rotor to be reworked.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a rotor tooth profile misalignment tooling for a stepper motor, comprising a base plate, a fixed tooth profile seat block mounted on the top surface of the base plate, a detachable fixed tooth profile seat on the top surface of the fixed tooth profile seat block, a slide rail fixedly connected to the top surface of the base plate, and a movable tooth profile seat slidably disposed above the slide rail, cooperating with the fixed tooth profile seat; a semi-circular groove is formed at one end of the contact point between the fixed tooth profile seat and the movable tooth profile seat, the two semi-circular grooves forming a space for surrounding the rotor laminations. The fixed toothed seat and the movable toothed seat each have a set of misaligned parts installed on their semicircular grooves; the two sets of misaligned parts are symmetrically arranged; the top of the base plate has a clearance hole for inserting and installing a cylinder; the fixed toothed seat pad has a protruding boss with a hole relative to the fixed toothed seat, the boss with the hole is located below the semicircular groove, and the hole is aligned with the axis of the semicircular groove; the top surface of the base plate has an elbow clamping device for pushing the movable toothed seat to move, and the elbow clamping device is detachably connected to the base plate.

[0006] Preferably, both the fixed toothed seat and the movable toothed seat have slots on their top surfaces for inserting the misaligned component; the misaligned component includes a single-toothed piece and a double-toothed piece, with one toothed tooth connected to the side of the single-toothed piece facing the semicircular groove, and two toothed teeth connected to the side of the double-toothed piece facing the semicircular groove; one tooth of the single-toothed piece is spatially located at the midline between the two teeth of the double-toothed piece; the teeth of both the double-toothed piece and the single-toothed piece are adapted to the tooth profile of the rotor lamination to be installed.

[0007] Preferably, the top and bottom ends of the misaligned component are provided with baffles that are inserted into the semicircular grooves of the fixed toothed seat and the movable toothed seat. The portion of the baffle and the misaligned component located in the semicircular groove is arc-shaped and matches the arc of the semicircular groove.

[0008] Preferably, a slider is fixedly connected to the bottom surface of the movable toothed seat, and the slider is slidably engaged with the top of the slide rail.

[0009] Preferably, a gasket is installed on the boss of the fixed toothed seat block.

[0010] Preferably, the elbow clamp device is used to convert rotation into linear motion of the moving toothed seat, including a support plate detachably connected to the base plate, a push rod rotatably connected to the end of the support plate away from the slide rail, a connecting plate rotatably connected to the middle of the push rod, a connecting rod rotatably connected to one end of the connecting plate, a push-pull block fixedly connected to the top end of the connecting rod, and a screw threadedly connected to the moving toothed seat inside the side wall of the push-pull block.

[0011] Preferably, the top surface of the base plate is provided with a recessed platform, the top surface of the recessed platform is provided with a mounting plate that is fixedly connected to the bottom surface of the support plate, and the top surface of the mounting plate is provided with a screw that is threadedly connected to the recessed platform.

[0012] Preferably, the top surface of the fixed toothed seat has two mounting holes, and the mounting holes are provided with two screws that are threadedly connected to the fixed toothed seat pad.

[0013] The technical effects and advantages of this utility model are as follows: This utility model has a fixed toothed seat and a movable toothed seat that cooperates with the fixed toothed seat on the base plate. Both of them are equipped with misalignment parts for adjusting the angle of the stacked rotor laminations. Compared with controlling the angle of the stacked rotor laminations by visual inspection, this utility model can control the accuracy of the angle of the stacked rotor laminations more precisely, avoid rework processes, and improve production efficiency. Attached Figure Description

[0014] Figure 1 This is an exploded structural diagram of the present invention.

[0015] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 3 This is a partial three-dimensional structural diagram of the present invention.

[0017] Figure 4 This is a top view of the structure of this utility model.

[0018] In the diagram: 1. Base plate; 2. Movable toothed seat; 3. Baffle; 4. Fixed toothed seat; 5. Push-pull block; 6. Fixed toothed seat pad; 7. Slide rail; 8. Slider; 9. Elbow clamp device; 91. Connecting rod; 92. Connecting plate; 93. Push rod; 94. Support plate; 10. Shim; 11. Misalignment component; 13. Screw one; 14. Screw two; 15. Mounting plate; 16. Screw three; 17. Clearance hole; 18. Rotor lamination. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] In the first embodiment, the tooth angle of the two stacked rotor laminations 18 is controlled visually, which makes it impossible to effectively control the angle error. This can easily lead to reduced motor output, increased motor noise, imbalance, and even motor failure. This application prefers to use a device to fix the tooth angle of the two stacked rotor laminations 18 to prevent the rotor from being disassembled and adjusted after assembly; see attached figure. Figure 1 Appendix Figure 2 Appendix Figure 3 and appendix Figure 4Understandably, when using this utility model, the elbow clamp device 9 first pushes the push-pull block 5, which in turn pushes the movable toothed seat 2, which is detachably connected to the push-pull block 5, to move along the slide rail 7 toward the fixed toothed seat 4 until the opposing surfaces of the movable toothed seat 2 and the fixed toothed seat 4 are aligned and close together. Then, the stacked rotor laminations 18 are placed into the circular groove formed by the fixed toothed seat 4 and the movable toothed seat 2. It should be noted that the teeth of the two stacked rotor laminations 18 are in close contact with the misaligned member 11 on the semi-circular arc surface of the fixed toothed seat 4 and the movable toothed seat 2, which are detachably connected to the fixed toothed seat pad 6. The upper rotor lamination 18 is in close contact with the single tooth of the misaligned member 11, and the lower rotor lamination 18 is in close contact with the double tooth of the misaligned member 11. One tooth of the toothed lamination is located spatially at the midline of the two teeth of the double-toothed lamination. Therefore, the included angle of the teeth of the two stacked rotor laminations 18 is half the included angle of each pair of adjacent teeth of the rotor laminations 18. Compared with controlling the included angle of the teeth of the stacked rotor laminations 18 by visual inspection, this invention can more accurately control the included angle of the teeth of the stacked rotor laminations 18. Then, the mounting cylinder is taken out, and the thin column at one end of the mounting cylinder is inserted into the clearance hole 17 in the base plate 1. At this time, the thick column in the middle of the mounting cylinder is aligned with the socket of the rotor lamination 18 and punched until one end of the thick column touches the boss of the fixed toothed seat block 6. At this time, the rotor assembly is completed. During the operation, due to the shaping and reinforcement of the misalignment part 11, the tooth angle of the two rotor laminations 18 is more accurate. Using the cooperation of the elbow clamp device 9 and the slide rail 7, the rotor laminations 18 are fixed after sliding on the plane. Finally, the mounting cylinder is pressed into the inner hole of the rotor lamination 18, which effectively solves the problems of high product defect rate and difficult operation.

[0021] Example 2, see attached document Figure 1 Based on Embodiment 1, the elbow clamp device 9 pushes the movable toothed seat 2 to move along the slide rail 7 towards the fixed toothed seat 4. It can be understood that when the elbow clamp device 9 is in use, it first pushes the push rod 93 to change the angle between the push rod 93 and the support plate 94, squeezing the connecting plate 92 and pushing the connecting rod 91 towards the push-pull block 5. The push-pull block 5 pushes the movable toothed seat 2 and the slider 8 at the bottom of the movable toothed seat 2 to move along the slide rail 7 towards the fixed toothed seat 4 until the movable toothed seat 2 and the fixed toothed seat 4 are in contact, thereby positioning the rotor lamination 18. After the rotor is installed, the push rod 93 is pulled in the opposite direction to remove the installed rotor. It is worth noting that the mounting plate 15 on the bottom surface of the support plate 94 and the base plate 1 are detachably connected by screws 13, which facilitates the replacement and maintenance of the elbow clamp device 9.

[0022] Example 3, see attached document Figure 1 Appendix Figure 2 and attached Figure 3Based on the fact that in Embodiment 1, the fixed toothed seat pad 6 has a protruding boss with a hole relative to the fixed toothed seat 4, in this application, a shim 10 is installed on the boss so that the mounting cylinder can bear the downward pressure of the mounting cylinder and the rotor lamination 18 during the stamping process, while avoiding the pressure of the mounting cylinder directly acting on the fixed toothed seat pad 6 during the stamping process, thus avoiding stamping damage to the fixed toothed seat pad 6.

[0023] Example 4, see attached document Figure 1 Appendix Figure 2 and attached Figure 3 Based on the fact that both ends of the misaligned part 11 on the semi-circular groove arc surface of the fixed toothed seat 4 and the movable toothed seat 2 in Embodiment 1 are provided with baffles 3 inserted into the semi-circular grooves of the fixed toothed seat 4 and the movable toothed seat 2, the two baffles 3 can be removed to facilitate the replacement of the misaligned part 11. Thus, the corresponding misaligned part 11 can be replaced for rotor laminations 18 with different tooth shapes, making the device more flexible in use.

[0024] Example 5, see attached document Figure 1 Based on the fixed toothed seat 4 which is detachably connected to the fixed toothed seat 6 in Embodiment 1, the top surface of the fixed toothed seat 4 has two mounting holes. The mounting holes are provided with screws 14 that are threadedly connected to the fixed toothed seat 6, and the mounting groove on the side wall of the push-pull block 5 is provided with screws 16 that are threadedly connected to the movable toothed seat 2. The fixed toothed seat 6 and the fixed toothed seat 4, as well as the push-pull block 5 and the movable toothed seat 2, are connected in a detachable manner, which facilitates the replacement and maintenance of the two compatible movable toothed seats 2 and fixed toothed seats 4.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cogging tool for rotor tooth profile of a stepper motor comprising a base plate (1), characterized in that: A fixed toothed seat block (6) is installed on the top surface of the base plate (1). A detachable fixed toothed seat (4) is provided on the top surface of the fixed toothed seat block (6). A slide rail (7) is fixedly connected to the top surface of the base plate (1). A movable toothed seat (2) that cooperates with the fixed toothed seat (4) is slidably provided above the slide rail (7). A semi-circular groove is provided at one end of the connection between the fixed toothed seat (4) and the movable toothed seat (2). The two semi-circular grooves form a structure for surrounding the rotor. The circular groove of the plate (18); a set of misaligned parts (11) are respectively installed on the arc surface of the semicircular groove of the fixed toothed seat (4) and the movable toothed seat (2); the two sets of misaligned parts (11) are symmetrically arranged; the top of the base plate (1) is provided with a clearance hole (17) for inserting and installing the cylinder; the fixed toothed seat pad (6) is provided with a protruding boss with a hole relative to the fixed toothed seat (4), the boss with the hole is located below the semicircular groove, and the hole is aligned with the axis of the semicircular groove; The top surface of the base plate (1) is provided with an elbow clamp device (9) for pushing the movable toothed seat (2) to move. The elbow clamp device (9) is detachably connected to the base plate (1).

2. The cogging tool for the rotor of a stepper motor according to claim 1, characterized in that: Both the fixed toothed seat (4) and the movable toothed seat (2) have slots on their top surfaces for inserting the misaligned component (11); the misaligned component (11) includes a single-toothed piece and a double-toothed piece, the side of the single-toothed piece facing the semi-circular groove is connected to one tooth, and the side of the double-toothed piece facing the semi-circular groove is connected to two teeth; one tooth of the single-toothed piece is located in space at the midline of the two teeth of the double-toothed piece; the teeth of the double-toothed piece and the teeth of the single-toothed piece are both adapted to the tooth profile of the rotor lamination to be installed.

3. The cogging tool for the rotor of a stepper motor according to claim 1, wherein: The top and bottom ends of the misaligned component (11) are provided with baffles (3) that are inserted into the semicircular grooves of the fixed toothed seat (4) and the movable toothed seat (2). The baffles and the part of the misaligned component (11) located in the semicircular groove are arc-shaped and fit with the arc of the semicircular groove.

4. The cogging tool for the rotor of a stepper motor according to claim 1, wherein: The bottom surface of the movable toothed seat (2) is fixedly connected to a slider (8), which is slidably engaged with the top of the slide rail (7).

5. The cogging tool for the rotor of a stepper motor according to claim 1, wherein: A gasket (10) is installed on the boss of the fixed toothed seat block (6).

6. The cogging tool for the rotor of a stepper motor according to claim 1, wherein: The elbow clamp device (9) is used to convert rotation into linear motion of the moving toothed seat (2). It includes a support plate (94) detachably connected to the base plate (1). A push rod (93) is rotatably connected to one end of the support plate (94) away from the slide rail (7). A connecting plate (92) is rotatably connected to the middle of the push rod (93). A connecting rod (91) is rotatably connected to one end of the connecting plate (92). A push-pull block (5) is fixedly connected to the top end of the connecting rod (91). The side wall of the push-pull block (5) is provided with three screws (16) that are threadedly connected to the moving toothed seat (2).

7. The cogging tool for the rotor of a stepper motor according to claim 1, wherein: The top surface of the base plate (1) is provided with a recessed platform, and the top surface of the recessed platform is provided with a mounting plate (15) that is fixedly connected to the bottom surface of the support plate (94). The top surface of the mounting plate (15) is provided with a screw (13) that is threadedly connected to the recessed platform.

8. The rotor tooth profile misalignment tooling for a stepper motor according to claim 1, characterized in that: The top surface of the fixed toothed seat (4) has two mounting holes, and the mounting holes are provided with screws (14) that are threadedly connected to the fixed toothed seat pad (6).

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