Small-size closed-loop stepping motor

Abstract

The utility model relates to the technical field of stepping motors, in particular to a small-size closed-loop stepping motor which comprises a motor body, an encoder assembly and a quick connection assembly, the motor body is provided with a rear end cover provided with a convex column, the convex column is provided with a clamping groove, the encoder assembly comprises a shell, a lifting hole is formed in the side wall of the shell, one side of the lifting hole is communicated with an insertion hole, and the insertion hole is communicated with the lifting hole. A quick connecting assembly is arranged in the lifting hole and comprises a clamping block and an elastic piece, the two ends of the clamping block are provided with a pressing part and a bending part respectively, one side of the bending part is provided with a first guide face, the two ends of the elastic piece abut against the clamping block and the shell respectively, and when the clamping block moves up and down, the bending part is clamped with or separated from the clamping groove; according to the utility model, during installation, the motor body and the encoder assembly can be connected only by aligning the convex column with the jack and then moving the housing towards the rear end cover to abut against each other, and the clamping block is pressed during disassembly, so that the advantage of rapid disassembly and assembly of the stepping motor body and the encoder assembly is realized.

Description

Technical Field

[0001] This application relates to the field of stepper motor technology, and more specifically to a small-sized closed-loop stepper motor. Background Technology

[0002] A stepper motor is a type of electric motor that converts electrical pulse signals into corresponding angular or linear displacement. Each input pulse signal causes the rotor to rotate by one angle or move forward one step. A closed-loop stepper motor adds an encoder to the motor body.

[0003] There is a closed-loop stepper motor, such as Figure 1 As shown, the device includes a stepper motor body 90 and an encoder assembly 91. The encoder assembly 91 includes a housing and a code disk (not shown in the figure). The housing is welded to the stepper motor body 90 and encloses the code disk inside. However, when the code disk is damaged and needs to be replaced, it is difficult to disassemble and replace the code disk because the housing is welded to the stepper motor body 90.

[0004] Therefore, there is a need for a small-sized closed-loop stepper motor that allows for quick assembly and disassembly of the stepper motor body and encoder assembly. Utility Model Content

[0005] The main objective of this application is to provide a small-sized closed-loop stepper motor, including a motor body and an encoder assembly. The motor body has a rear end cover with several protrusions, each protrusion having a slot. The encoder assembly is located on one side of the rear end cover and includes a housing. The side wall of the housing has several lifting holes, each lifting hole having a connecting hole on one side. The small-sized closed-loop stepper motor also includes several quick-connect components, with one quick-connect component located within each lifting hole. The component includes a locking block and an elastic member. The locking block has a pressing part and a bending part at each end. One side of the bending part has a first guide surface. The two ends of the elastic member abut against the locking block and the outer shell, respectively. When the locking block moves up and down, the bending part engages or disengages with the locking slot. During installation, it is only necessary to align the protrusion with the insertion hole and then move the outer shell towards the rear end cover until they abut against each other to achieve the engagement of the locking block and the protrusion and fix the encoder assembly to the motor body. Compared with the prior art, it has the advantage of quick assembly and disassembly of the stepper motor body and the encoder assembly.

[0006] Another object of the present application is to provide a small size closed loop stepper motor, wherein the small size closed loop stepper motor further comprises a sleeve ring, the sleeve ring has an inner hole, the outer shell passes through the inner hole, the sleeve ring is slidably sleeved on the outer shell, and the inner hole is provided with a second guide surface near one end of the pressing portion, the pressing portion protrudes from the lifting hole by a predetermined distance, and the highest point of the pressing portion is lower than the highest point of the second guide surface. By providing a sleeve ring, the plurality of clamping blocks are moved towards the center axis of the outer shell.

[0007] In order to achieve at least one of the above-mentioned objects, the present application provides a small size closed loop stepper motor, comprising a motor body and an encoder assembly, wherein:

[0008] The motor body has a rear end cover, the rear end cover is provided with a plurality of convex columns, each of the convex columns has a clamping groove; and

[0009] The encoder assembly is arranged on one side of the rear end cover, and the encoder assembly comprises an outer shell, the side wall of the outer shell has a plurality of lifting holes, and each lifting hole is communicated with a insertion hole on one side; and

[0010] The small size closed loop stepper motor further comprises a plurality of quick connection assemblies, each lifting hole is provided with a quick connection assembly, the quick connection assembly comprises a clamping block and a elastic piece, the clamping block has a pressing portion and a bent portion at two ends respectively, the bent portion has a first guide surface on one side, and the two ends of the elastic piece are abutted with the clamping block and the outer shell respectively, when the clamping block moves up and down, the bent portion is connected or separated with the clamping groove.

[0011] In one or more embodiments of the present application, the small size closed loop stepper motor further comprises a sleeve ring, the sleeve ring has an inner hole, the outer shell passes through the inner hole, the sleeve ring is slidably sleeved on the outer shell, and the inner hole is provided with a second guide surface near one end of the pressing portion, the pressing portion protrudes from the lifting hole by a predetermined distance, and the highest point of the pressing portion is lower than the highest point of the second guide surface.

[0012] In one or more embodiments of the present application, the outer shell further comprises a plurality of cover plates, each lifting hole is provided with a cover plate, and the clamping block further has an extension portion, and the two ends of the elastic piece are abutted with the extension portion and the cover plate respectively.

[0013] In one or more embodiments of the present application, the motor body further comprises a front end cover and an electromagnetic assembly, the electromagnetic assembly is located between the front end cover and the rear end cover, and the rear end cover away from the front end cover has a plurality of threaded holes, and each threaded hole is threadedly connected with a convex column.

[0014] In one or more embodiments of the present application, the electromagnetic assembly comprises a stator assembly and a rotor assembly, the rotor assembly comprises a rotating shaft and a plurality of rotor cores, the rotor cores are sleeved on the rotating shaft and fixedly connected with the rotating shaft, the front end cover and the rear end cover each have a center hole, the motor body further comprises two bearings, two gaskets and a coil, the rotating shaft passes through the center holes of the front end cover and the rear end cover, the rotor cores are located between the front end cover and the rear end cover, each of the center holes of the front end cover and the rear end cover is provided with a bearing, each of the bearings is provided with a gasket between the rotor cores, the coil is threadedly connected with the center hole of the rear end cover, and the coil abuts against one of the bearings.

[0015] In the embodiment of the present application, the small-size closed-loop stepping motor comprises a motor body, an encoder assembly and a quick-connection assembly. The motor body has a rear end cover provided with a protruding column having a clamping groove. The encoder assembly comprises a shell, and the sidewall of the shell has a lifting hole. One side of the lifting hole is communicated with a insertion hole, and the lifting hole is provided with the quick-connection assembly. The quick-connection assembly comprises a clamping block and an elastic piece. The clamping block has a pressing portion and a bent portion at two ends thereof. One side of the bent portion has a first guide surface. The two ends of the elastic piece abut against the clamping block and the shell, respectively. When the clamping block moves up and down, the bent portion is clamped or separated from the clamping groove. During installation, the protruding column is only required to be aligned with the insertion hole, and then the shell is moved to the rear end cover direction to abut against each other, so that the clamping block is clamped with the protruding column, and the encoder assembly is fixed on the motor body. Compared with the prior art, the stepping motor body and the encoder assembly have the advantages of quick disassembly and assembly. BRIEF DESCRIPTION OF DRAWINGS

[0016] These and / or other aspects and advantages of the present application will become more apparent and more readily appreciated from the following detailed description of the embodiments of the present application, taken in conjunction with the accompanying drawings in which:

[0017] Figure 1 Fig. 1 shows a structural schematic diagram of a prior closed-loop stepping motor;

[0018] Figure 2 Fig. 1 shows a structural schematic diagram of a prior closed-loop stepping motor;

[0019] Figure 3 Fig. 1 shows a structural schematic diagram of a prior closed-loop stepping motor; Figure 2 Fig. 1 shows a structural schematic diagram of a prior closed-loop stepping motor;

[0020] Figure 4 Fig. 1 shows a structural schematic diagram of a prior closed-loop stepping motor; DETAILED DESCRIPTION

[0021] The terms and words used in the following description and claims are not limited to the literal meanings and are only used by the inventors to enable a clear and consistent understanding of the application. Accordingly, it is apparent that the following description of various embodiments of the present application is provided only for the purpose of illustration and understanding of the present application, and not for the purpose of limiting the present application as defined by the appended claims and their equivalents.

[0022] It is understood that the term "one" should be understood as "at least one" or "one or more" such that a quantity of an element can be either one or more, in one embodiment, the quantity of an element may

[0023] Although numerals such as "first", "second", or the like will be used in describing various components, those components are not limited herein. The term is used only to distinguish one component from another component. For example, a first component could be termed a second component, and, similarly, a second component could be termed a first component without departing from the teachings of the present inventive concept. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] The terms used herein are only for the purpose of describing various embodiments and are not intended to be limiting. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "has," when used in this specification, specify the presence of stated features, numbers, steps, operations, components, elements, or a combination thereof, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, elements, or groups thereof.

[0025] An illustrative small-size closed-loop stepper motor, with reference to Figures 2 to 4 A small-size closed-loop stepper motor according to a preferred embodiment of the present inventive concept includes a motor body 10 and an encoder assembly 20.

[0026] In particular, as Figure 3As shown, the motor body 10 has a rear end cover 101, and the rear end cover 101 is provided with a plurality of convex columns 1011, and each convex column 1011 has a clamping groove 1012. In addition, the encoder assembly 20 is arranged on one side of the rear end cover 101, and the encoder assembly 20 comprises a shell 201, and the side wall of the shell 201 has a plurality of lifting holes 2011, and each lifting hole 2011 is communicated with a plug hole 2012 on one side, and the end of the plug hole 2012 away from the lifting hole 2011 is communicated with the outside. In addition, the small size closed loop stepping motor further comprises a plurality of quick connecting assemblies 30, and each lifting hole 2011 is provided with a quick connecting assembly 30, and the quick connecting assembly 30 comprises a clamping block 301 and a elastic piece 302, as shown Figure 3 and Figure 4 As shown, the two ends of the clamping block 301 are respectively provided with a pressing part 3011 and a bent part 3012, and the bent part 3012 is provided with a first guide surface 3013 on one side, and the two ends of the elastic piece 302 are respectively abutted with the clamping block 301 and the shell 201, and when the clamping block 301 moves up and down, the bent part 3012 is connected or separated with the clamping groove 1012.

[0027] It should be noted that the elastic member 302 is preferably a spring, and the first guide surface 3013 is preferably an inclined surface. When the encoder assembly 20 is connected to the rear end cover 101, each insertion hole 2012 is aligned with a corresponding protruding column 1011, and the shell 201 is moved towards the rear end cover 101, so that the protruding column 1011 extends into the insertion hole 2012. It should be noted that at this time, under the elastic force of the elastic member 302, the first guide surface 3013 of the clamping block 301 is aligned with the protruding column 1011. As the protruding column 1011 further extends into the insertion hole 2012 and comes into contact with the first guide surface 3013, it should be noted that at this time the shell 201 is still spaced apart from the rear end cover 101 by a predetermined distance. As the assembly personnel further clamp the shell 201 to the rear end cover 101, the first guide surface 3013 receives a component force moving towards the central axis of the shell 201, and the clamping block 301 as a whole moves towards the central axis of the shell 201 by a predetermined distance. At this time, the elastic member 302 is stressed and deformed. When the side wall of the protruding column 1011 slides along the top surface of the bent portion 3012 by a predetermined distance, the bent portion 3012 and the first guide surface 3013 are aligned with the clamping groove 1012. Then, under the elastic force of the elastic member 302, the clamping block 301 moves away from the central axis of the shell 201 and is clamped into the clamping groove 1012. Since the side surface of the bent portion 3012 away from the first guide surface 3013 and the side surface of the clamping groove 1012 are both flat surfaces, it should be noted that at this time, the shell 201 abuts against the rear end cover 101. As can be seen, when the encoder assembly 20 is connected to the rear end cover 101, the assembly personnel only need to push the shell 201 after aligning the protruding column 1011 with the insertion hole 2012, and then abut the shell 201 against the rear end cover 101, so that the encoder assembly 20 can be quickly installed on the motor body 10. When the components such as the code disc in the encoder assembly 20 located in the shell 201 are damaged and need to be replaced, the assembly personnel only need to press the pressing portion 3011 by hand or with a tool, and at the same time move the shell 201 away from the rear end cover 101, so that the motor body 10 and the encoder assembly 20 can be quickly separated. Compared with the prior art, the present application has the advantages of quick assembly and disassembly of the stepper motor body 10 and the encoder assembly 20.

[0028] Further, in the embodiments of the present application, the rear end cover 101 and the shell 201 have a square or rectangular overall profile. Each corner of the rear end cover 101 is provided with a protruding column 1011, and correspondingly, each corner of the shell 201 is provided with a quick connection assembly 30.

[0029] Further, in order to avoid the need to press each of the pressing portions 3011 without the clamping block 301 when the encoder assembly 20 needs to be separated from the motor body 10, in the embodiment of the present application, as shown in Figure 3 The small-size closed-loop stepper motor further comprises a sleeve 40, the sleeve 40 has an inner hole 401, the outer shell 201 passes through the inner hole 401, the sleeve 40 is slidably sleeved on the outer shell 201, and the inner hole 401 is provided with a second guide surface 4011 near one end of the pressing portion 3011, the pressing portion 3011 protrudes from the lifting hole 2011 by a predetermined distance, and the highest point of the pressing portion 3011 is lower than the highest point of the second guide surface 4011, and the width of the pressing portion 3011 is smaller than the diameter of the inner hole 401.

[0030] It should be noted that the second guide surface 4011 is preferably a tapered surface, when the encoder assembly 20 needs to be separated from the motor body 10, the operator only needs to slide the sleeve 40 and make the second guide surface 4011 contact the top of the pressing portion 3011, at this time each pressing portion 3011 is subjected to a component force moving towards the central axis of the outer shell 201, and moves towards the central axis of the outer shell 201, and the bending portion 3012 is separated from the clamping groove 1012, at this time, the assembler pulls the outer shell 201, and the encoder assembly 20 is separated from the motor body 10.

[0031] Further, in order to install the elastic member 302, as shown in Figure 3 The outer shell 201 further comprises a plurality of cover plates 2013, each lifting hole 2011 is provided with a cover plate 2013, and the clamping block 301 further comprises an extension portion 3014, and the two ends of the elastic member 302 are respectively abutted against the extension portion 3014 and the cover plate 2013.

[0032] Further, in the embodiment of the present application, as shown in Figure 2 and Figure 3 The motor body 10 further comprises a front end cover 102 and an electromagnetic assembly 103, the electromagnetic assembly 103 is located between the front end cover 102 and the rear end cover 101, the rear end cover 101 away from the front end cover 102 is provided with a plurality of threaded holes 1013, and each threaded hole 1013 is threadedly connected with a protruding column 1011.

[0033] In addition, as shown in Figure 2As shown, the electromagnetic assembly 103 comprises a stator assembly 1031 and a rotor assembly 1032, the rotor assembly 1032 comprises a rotating shaft 10321 and a plurality of rotor cores 10322, the rotor cores 10322 are sleeved on the rotating shaft 10321 and fixedly connected with the rotating shaft 10321, the front end cover 102 and the rear end cover 101 both have a center hole 1014, the motor body 10 further comprises two bearings 104, two gaskets 105 and a screw ring 106, the rotating shaft 10321 passes through the center hole 1014 on the front end cover 102 and the rear end cover 101, the rotor cores 10322 are located between the front end cover 102 and the rear end cover 101, the center hole 1014 of the front end cover 102 and the rear end cover 101 is provided with a bearing 104, the bearing 104 and the rotor core 10322 are provided with a gasket 105, the screw ring 106 is threadedly connected with the center hole 1014 on the rear end cover 101, and the screw ring 106 abuts against a bearing 104.

[0034] It should be noted that by screwing the screw ring 106, the screw ring 106 can move towards the bearing 104, and the bearing 104, the gasket 105 and the rotor core 10322 are abutted against each other, avoiding the gap between the bearing 104 and the gasket 105 caused by machining error and assembly gap.

[0035] In summary, the small size closed loop stepper motor based on the embodiment of the application is illustrated, which provides the advantages of quick disassembly and assembly of the stepper motor body and the encoder assembly for the small size closed loop stepper motor.

[0036] It is worth mentioning that in the embodiment of the application, the small size closed loop stepper motor has simple structure, does not involve complex manufacturing process and expensive materials, and has high economy. At the same time, for the manufacturer, the small size closed loop stepper motor provided by the application is easy to produce and has low cost, which is more conducive to controlling production cost and further conducive to product promotion and use.

[0037] Those skilled in the art should understand that the embodiments of the utility model shown in the above description and the drawings are only as examples and do not limit the utility model. The purpose of the utility model has been completely and effectively realized. The function and structural principle of the utility model have been shown and explained in the embodiments, and the implementation of the utility model can be any deformation or modification without departing from the principle.

Claims

1. A small size closed loop stepper motor comprising a motor body and an encoder assembly, characterized in that: the motor body has a rear end cover, the rear end cover is provided with a plurality of protruding posts, each of the protruding posts has a clamping groove; and the encoder assembly is arranged on one side of the rear end cover, and the encoder assembly comprises a shell, the sidewall of the shell has a plurality of lifting holes, and each of the lifting holes is communicated with a insertion hole on one side; and the small size closed loop stepper motor further comprises a plurality of quick connection assemblies, each of the lifting holes is provided with a quick connection assembly, the quick connection assembly comprises a clamping block and an elastic piece, the clamping block has a pressing portion and a bent portion at two ends respectively, the bent portion has a first guide surface on one side, and the two ends of the elastic piece are abutted with the clamping block and the shell respectively, when the clamping block moves up and down, the bent portion is connected or separated with the clamping groove.

2. A small size closed loop stepper motor as claimed in claim 1, wherein: The small size closed loop stepper motor further comprises a sleeve ring, the sleeve ring has an inner hole, the shell passes through the inner hole, the sleeve ring is slidably sleeved on the shell, and the inner hole has a second guide surface on one end close to the pressing portion, the pressing portion protrudes out of the lifting hole by a predetermined distance, and the highest point of the pressing portion is lower than the highest point of the second guide surface.

3. A small size closed loop stepper motor as claimed in claim 2, wherein: The shell further comprises a plurality of cover plates, each of the lifting holes is provided with a cover plate, the clamping block further has an extension portion, and the two ends of the elastic piece are abutted with the extension portion and the cover plate respectively.

4. The small size closed loop stepper motor according to claim 3, wherein: The motor body further comprises a front end cover and an electromagnetic assembly, the electromagnetic assembly is located between the front end cover and the rear end cover, and the rear end cover away from the front end cover has a plurality of threaded holes, and each of the threaded holes is threadedly connected with a protruding post.

5. Small size closed loop stepper motor according to any of claims 1-4, characterized in that: The electromagnetic assembly comprises a stator assembly and a rotor assembly, the rotor assembly comprises a rotating shaft and a plurality of rotor cores, the rotor cores are sleeved on the rotating shaft and fixedly connected with the rotating shaft, the front end cover and the rear end cover have a center hole, the motor body further comprises two bearings, two gaskets and a coil, the rotating shaft passes through the center holes of the front end cover and the rear end cover, the rotor cores are located between the front end cover and the rear end cover, the center holes of the front end cover and the rear end cover are provided with a bearing respectively, each of the bearings is provided with a gasket between the rotor core, and the coil is threadedly connected with the center hole of the rear end cover and abutted with a bearing.

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