Linear stepper motor

Abstract

The utility model belongs to the technical field of electronic equipment processing, specifically provide a linear step motor, including motor body, linear moving part, guide piece and position detection element, motor body drive linear moving part along self axial linear motion, guide piece sets up on motor body, can guide linear moving part, guarantee moving direction precision, position detection element is used for detecting the moving distance of linear moving part, guarantees moving distance precision, guide piece and position detection element common effect, can satisfy electronic and semiconductor product processing to the requirement of position precision. The utility model installs guide piece in the one side of motor body shell, and is through the sliding slot and the convex structure and linear moving part sliding fit, has the advantages such as compact structure, convenient arrangement, help to save the installation space, especially suitable for the narrow use scene of space.

Description

Technical Field

[0001] This application belongs to the field of electronic equipment processing technology, specifically a linear stepper motor. Background Technology

[0002] Linear stepper motors are common drive devices that output linear motion to move related components. High-precision linear stepper motor modules are required for driving critical processes such as the transportation, welding, clamping, and testing of electronic components or semiconductor devices.

[0003] As a moving component, the slider of a linear stepper motor requires precise guidance from a guide rail due to the high positional accuracy requirements in the processing of electronic or semiconductor products. The length of the guide rail is greater than the slider's stroke. In existing technologies, the guide rail is mostly fixed to the worktable or frame of the processing equipment, separating it from the motor. This not only requires a large installation space on the processing equipment but is also inconvenient to install when the internal components of the equipment are compact. Utility Model Content

[0004] Based on the above-mentioned technical problems, this application provides a linear stepper motor to solve the technical problem in the prior art where the guide rail and motor are separated, resulting in a large space occupation during installation, which is both wasteful of space and inconvenient for layout.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a linear stepper motor is provided, including a motor body, a linear moving member, a guide member, and a position detection element. The linear moving member is connected to the motor body and can reciprocate along the axial direction of the motor body. The guide member is disposed on one side of the outer shell of the motor body. The guide member and the linear moving member have a sliding fit structure formed by a groove and a protrusion. One of the guide member and the linear moving member forms the groove, and the other forms the protrusion. Both the groove and the protrusion extend along the axial direction of the motor body. A sensing part is formed on the linear moving member. The position detection element is disposed on the motor body and located in the moving path of the sensing part. The detection end of the position detection element corresponds to the sensing part in the axial direction of the motor body. When the linear moving member moves to the maximum stroke position, the sensing part can cause the position detection element to generate a sensing signal.

[0006] In this application, the guide component functions similarly to a conventional guide rail, and the linear moving component functions similarly to a conventional slider. The motor body is a conventional stepper motor, which can be an externally driven linear stepper motor or a through-axis linear stepper motor.

[0007] When an externally driven linear stepper motor is used, the rotor and lead screw inside the motor body are integrated into one unit. The linear moving part is threadedly engaged with the lead screw, and the rotor drives the lead screw to rotate, thereby pushing the linear moving part to achieve reciprocating linear motion. When a through-shaft linear stepper motor is used, the lead screw and the linear moving part are fixedly connected, and the lead screw and the linear moving part move linearly together. Both of the above structures are applicable to the linear stepper motor provided in this application, and users can choose according to their actual needs.

[0008] The linear stepper motor provided in this application was developed to address the problem of compact structure and limited space in production equipment in the electronics and semiconductor industries, which makes installation and layout inconvenient. It features a compact structure and easy placement, aligning with the current industry trend towards miniaturization, integration, and high precision. Of course, without departing from the usage methods and working principles of this application, the linear stepper motor provided in this application can also be used in related equipment in other industries or fields.

[0009] In one possible implementation, the linear motion element includes: A first connecting member, elongated in shape and extending axially along the motor body, slides with the guide member. The first connecting member has a groove or protrusion on its side adjacent to the guide member. The second connector has a right-angle bend structure. One right-angle end of the second connector is connected to the motor body, and the other right-angle end is connected to the first connector.

[0010] In one possible implementation, the ends of the first connector and the second connector that are connected to each other are respectively formed with stepped mating surfaces, and the first connector and the second connector are connected by a first fastener.

[0011] In one possible implementation, the sensing element has an elongated detection hole along the axial direction of the motor body, the length of the detection hole corresponding to the travel of the linear motion member, the position detection element is a through-beam photoelectric switch, and the sensing element is housed in the detection slot of the through-beam photoelectric switch.

[0012] In one possible implementation, the linear moving member has an oil injection hole on the side opposite to the guide member, the oil injection hole penetrates the thickness of the linear moving member, and a sealing member is detachably provided inside the oil injection hole.

[0013] In one possible implementation, the sealing element is a screw plug.

[0014] In one possible implementation, an oil-absorbing cotton is provided inside the oil injection hole, and a filter screen is provided inside the oil injection hole at one end adjacent to the guide member.

[0015] In one possible implementation, the surface of the guide member that slides with the linear moving member is provided with an oil reservoir.

[0016] In one possible implementation, the guide is detachably connected to the motor body via a second fastener.

[0017] In one possible implementation, there are two guide members, which are respectively located on opposite sides of the motor body, and the linear moving member slides in cooperation with both guide members.

[0018] Compared with the prior art, the advantages of the linear stepper motor provided in this application are: The linear stepper motor provided in this application includes a motor body, a linear moving part, a guide part, and a position detection element. The motor body drives the linear moving part to move linearly along its own axis. The guide part is set on the motor body and can guide the linear moving part to ensure accurate movement direction. The position detection element is used to detect the movement distance of the linear moving part to ensure accurate movement distance. The guide part and the position detection element work together to meet the position accuracy requirements during the processing of electronic and semiconductor products.

[0019] This application installs the guide component on one side of the motor body housing and slides with the linear moving component through a groove and a raised structure. It has the advantages of compact structure and easy layout, which helps to save installation space and is especially suitable for use in confined spaces. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the linear stepper motor provided in Embodiment 1 of this application. Figure 1 ; Figure 2 This is an exploded view of the assembly of the linear stepper motor provided in Embodiment 1 of this application; Figure 3 This is a schematic diagram of the structure of the linear stepper motor provided in Embodiment 1 of this application. Figure 2 ; Figure 4 This is a schematic diagram of the guide component in Embodiment 1 of this application; Figure 5 This is a schematic diagram of the linear stepper motor provided in Embodiment 2 of this application; Explanation of reference numerals in the attached figures: 10. Motor body; 11. Lead screw; 12. Front end cover; 13. Rear end cover; 14. Housing; 15. Driver; 20. Linear moving part; 21. Slide groove; 22. Sensing part; 221. Detection hole; 23. Oil filling hole; 24. Plug; 25. First connecting part; 26. Second connecting part; 27. First fastener; 30. Guide part; 31. Protrusion; 311. Oil reservoir; 32. Second fastener; 40. Position detection element. Detailed Implementation

[0022] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0023] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0024] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0027] Please refer to the following: Figures 1 to 5 The linear stepper motor provided in this application will now be described.

[0028] Example 1: Please see Figures 1 to 4 The linear stepper motor includes a motor body 10, a linear moving member 20, a guide member 30, and a position detection element 40. The linear moving member 20 is connected to the motor body 10 and can reciprocate along the axial direction of the motor body 10. The guide member 30 is located on one side of the housing 14 of the motor body 10. The guide member 30 and the linear moving member 20 have a sliding fit structure formed by a groove 21 and a protrusion 31. One of the guide member 30 and the linear moving member 20 forms a groove 21, and the other forms a protrusion 31. Both the groove 21 and the protrusion 31 extend along the axial direction of the motor body 10.

[0029] A sensing part 22 is formed on the linear motion member 20. The position detection element 40 is provided on the motor body 10 and located on the movement path of the sensing part 22. The detection end of the position detection element 40 corresponds to the sensing part 22 in the axial direction of the motor body 10. When the linear motion member 20 moves to the maximum stroke position, the sensing part 22 can make the position detection element 40 generate a sensing signal.

[0030] Compared with the prior art, the beneficial effects of the linear stepper motor provided in Embodiment 1 of this application are: The linear stepper motor provided in this application includes a motor body 10, a linear moving part 20, a guide part 30, and a position detection element 40. The motor body 10 drives the linear moving part 20 to move linearly along its own axis. The guide part 30 is disposed on the motor body 10 and can guide the linear moving part 20 to ensure accurate movement direction. The position detection element 40 is used to detect the movement distance of the linear moving part 20 to ensure accurate movement distance. The guide part 30 and the position detection element 40 work together to meet the position accuracy requirements during the processing of electronic and semiconductor products.

[0031] In this embodiment, the guide member 30 is installed on one side of the housing 14 of the motor body 10, and slides with the linear moving member 20 through the structure of the slide groove 21 and the protrusion 31. It has the advantages of compact structure and easy arrangement, which helps to save installation space and is especially suitable for use scenarios with limited space.

[0032] The linear moving part 20 and the guide part 30 can be made of common materials such as stainless steel, aluminum alloy, and engineering plastics, as long as they have sufficient precision and strength to meet the usage requirements. The guide part 30 is used to guide the linear moving part 20. The length direction of the guide part 30 should be parallel to the axial direction of the motor body 10, and the length of the guide part 30 should not exceed the length of the outer shell 14 of the motor body 10.

[0033] The motor body 10 can be any commercially available externally driven linear stepper motor or through-shaft linear stepper motor, consisting of main components such as a stator, rotor, lead screw 11, front cover 12, rear cover 13, housing 14, and driver 15. There are no specific restrictions on the specific structure, installation, or usage of the motor body 10. The linear stepper motor can be installed horizontally, vertically, or at an angle; it can be used individually or in multiples side-by-side, and is controlled by a PLC program and the driver 15.

[0034] The guide component 30 can be integrally formed with the housing 14, that is, the guide component 30 is processed by injection molding, cutting or other methods when manufacturing the housing 14. Alternatively, the guide component 30 and the motor body 10 can also be detachably connected by the second fastener 32, ensuring that the installation position of the guide component 30 and the housing 14 is accurate and that there is no relative movement after installation.

[0035] Specifically, a groove 21 can be formed on the linear moving part 20, and a protrusion 31 can be formed on the guide part 30. The shape and size of the groove 21 and the protrusion 31 are compatible, for example, they can be T-shaped, dovetail-shaped, etc.

[0036] The linear moving part 20 can be a single piece or assembled from multiple parts. For details, please refer to [link / reference needed]. Figures 1 to 3 The linear moving part 20 includes a first connecting part 25 and a second connecting part 26. The first connecting part 25 is elongated and extends along the axial direction of the motor body 10. The first connecting part 25 is slidably engaged with the guide part 30. A groove 21 or a protrusion 31 is provided on the side of the first connecting part 25 adjacent to the guide part 30. The second connecting part 26 has a right-angle bent structure. The bending position can be an arc-shaped rounded corner or a right-angled side. One right-angled end of the second connecting part 26 is connected to the lead screw 11 of the motor body 10, and the other right-angled end is connected to the first connecting part 25.

[0037] To facilitate the connection and fixation of the first connector 25 and the second connector 26, the ends of the first connector 25 and the second connector 26 that are connected to each other are respectively formed with stepped mating surfaces to ensure accurate positioning. The first connector 25 and the second connector 26 are connected by a first fastener 27, which is a bolt. The bolt passes through one of the first connector 25 and the second connector 26 and is fixed by threaded connection with the other one.

[0038] To facilitate bolt installation, the first connector 25 and the second connector 26 should have mounting holes machined at the locations where stepped surfaces are formed. The mounting holes can be smooth holes or threaded holes as needed.

[0039] Please see Figures 1 to 3The sensing part 22 has an elongated detection hole 221 along the axial direction of the motor body 10. The length of the detection hole 221 corresponds to the travel of the linear moving part 20. The position detection element 40 is a through-beam photoelectric switch, and the sensing part 22 is housed in the detection slot of the through-beam photoelectric switch.

[0040] The through-beam photoelectric switch has a transmitter and a receiver, located on opposite sides of the detection slot. When an obstruction exists between the transmitter and receiver, a primary sensing signal is generated. During the movement of the linear motion member 20, the light signal emitted by the transmitter is received by the receiver through the detection hole 221. When the linear motion member 20 reaches its maximum travel position, the light signal is blocked by the physical structure of the sensing part 22. The through-beam photoelectric switch generates a primary sensing signal and transmits it to the controller. The controller, through the driver 15, controls the motor body 10 to rotate in the opposite direction, causing the linear motion member 20 to move in the opposite direction.

[0041] Please see Figures 1 to 3 The linear moving part 20 has an oil injection hole 23 on the side opposite to the guide part 30. The oil injection hole 23 penetrates the thickness of the linear moving part 20, and a sealing element is detachably installed inside the oil injection hole 23. The sealing element can be a rubber plug or a screw plug 24. When a screw plug 24 is used, the screw plug 24 is threadedly connected to the oil injection hole 23, and lubricating oil can be dripped through the oil injection hole 23 to lubricate the sliding mating surfaces between the linear moving part 20 and the guide part 30.

[0042] Lubrication helps reduce movement resistance and wear, extending the service life of guide 30 and linear motion component 20.

[0043] Oil-absorbing cotton can be installed inside the oil injection hole 23. The oil-absorbing cotton can absorb and store a certain amount of lubricating oil. A filter screen is installed inside the oil injection hole 23 at one end near the guide member 30 to prevent the oil-absorbing cotton from moving towards the sliding mating surface of the guide member 30. When lubrication is required, the screw plug 24 is tightened inward. The screw plug 24 squeezes the oil-absorbing cotton and squeezes out the lubricating oil. The squeezed-out lubricating oil drips onto the guide member 30 under the action of gravity and lubricates the sliding mating surface along the gap.

[0044] It should be noted that the oil-absorbing cotton does not hold a large amount of oil, and equipment maintenance personnel need to periodically open the screw plug 24 to add lubricating oil inside.

[0045] The surface of the guide member 30 that slides with the linear moving member 20 may be provided with an oil storage groove 311. The oil storage groove 311 extends along the length direction of the guide member 30, and multiple oil storage grooves 311 are spaced apart along the width direction of the guide member 30.

[0046] Example 2: Unlike Embodiment 1, Embodiment 2 has two guide members 30, which are respectively located on opposite sides of the motor body 10. The linear moving member 20 has two first connecting members 25, which are slidably engaged with the two guide members 30. This arrangement can further improve the stability of the linear moving member 20, reduce the wear of the guide members 30, and extend the service life of the guide members 30.

[0047] Apart from the structural differences mentioned above, the other structures in Embodiment 2 are the same as those in Embodiment 1, and will not be repeated here.

[0048] It is understood that the parts in the above embodiments can be freely combined or deleted to form different combined embodiments. The specific contents of each combined embodiment will not be repeated here. After this description, it can be considered that the present utility model specification has recorded each combined embodiment and can support different combined embodiments.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements 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 linear stepper motor, characterized in that, The device includes a motor body (10), a linear motion component (20), a guide component (30), and a position detection element (40). The linear motion component (20) is connected to the motor body (10) and can reciprocate along the axial direction of the motor body (10). The guide component (30) is located on one side of the outer shell (14) of the motor body (10). The guide component (30) and the linear motion component (20) have a sliding fit structure formed by a groove (21) and a protrusion (31). One of the guide component (30) and the linear motion component (20) forms the groove (21), and the other forms the protrusion (31). Both the groove (21) and the protrusion (31) extend along the axial direction of the motor body (10). A sensing part (22) is formed on the linear moving part (20). The position detection element (40) is provided on the motor body (10) and located on the moving path of the sensing part (22). The detection end of the position detection element (40) and the sensing part (22) are axially opposite to each other on the motor body (10). When the linear moving part (20) moves to the maximum stroke position, the sensing part (22) can make the position detection element (40) generate a sensing signal.

2. The linear stepper motor according to claim 1, characterized in that, The linear motion member (20) includes: The first connecting member (25) is elongated and extends axially along the motor body (10). The first connecting member (25) is slidably engaged with the guide member (30). The first connecting member (25) has the groove (21) or the protrusion (31) on the side adjacent to the guide member (30). The second connector (26) has a right-angle bend structure. One right-angle end of the second connector (26) is connected to the motor body (10), and the other right-angle end is connected to the first connector (25).

3. The linear stepper motor according to claim 2, characterized in that, The first connector (25) and the second connector (26) are connected to each other at one end, and the first connector (25) and the second connector (26) are connected by a first fastener (27).

4. The linear stepper motor according to claim 1, characterized in that, The sensing part (22) has an elongated detection hole (221) along the axial direction of the motor body (10). The length of the detection hole (221) corresponds to the travel of the linear moving part (20). The position detection element (40) is a through-beam photoelectric switch. The sensing part (22) is housed in the detection slot of the through-beam photoelectric switch.

5. The linear stepper motor according to claim 1, characterized in that, The linear moving part (20) has an oil injection hole (23) on the side opposite to the guide part (30). The oil injection hole (23) penetrates the thickness of the linear moving part (20), and a sealing part is detachably provided inside the oil injection hole (23).

6. The linear stepper motor according to claim 5, characterized in that, The sealing component is a screw plug (24).

7. The linear stepper motor according to claim 5, characterized in that, Oil-absorbing cotton is provided inside the oil injection hole (23), and a filter screen is provided inside the oil injection hole (23) at one end adjacent to the guide member (30).

8. The linear stepper motor according to claim 5, characterized in that, An oil reservoir (311) is provided on the surface of the guide member (30) that slides with the linear moving member (20).

9. The linear stepper motor according to claim 1, characterized in that, The guide (30) is detachably connected to the motor body (10) via a second fastener (32).

10. The linear stepper motor according to claim 1, characterized in that, The number of guide members (30) is two, and the two guide members (30) are respectively located on opposite sides of the motor body (10). The linear moving member (20) slides in cooperation with the two guide members (30) at the same time.

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