A transmission mechanism for a linear motor

Abstract

The utility model discloses a drive mechanism of linear motor, include: mounting bracket, mounting bracket defines a accommodating space, drive base, drive base is connected with mounting bracket through drive assembly, to make drive base be located in the accommodating space, drive base can move along the length direction of mounting bracket, drive assembly, at least drive assembly's a part is located in the accommodating space, and drive assembly includes the rotor and stator that set in drive base below in proper order, and the rotor is fixed on drive base, and the stator is fixed on mounting bracket, the stator includes stator core and winding coil, and the rotor is magnet, the rotor is fixed with drive base and is set up in the accommodating space of mounting bracket through drive assembly of the stator, and the magnetic field of stator is interacted with the rotor to drive drive base to move, and the simple structure is convenient to dismount, and drive assembly supports drive base on mounting bracket, also with mounting bracket cooperation guide drive base moves along the length direction of mounting bracket, has improved the stability in drive base moving process.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a transmission mechanism for a linear motor. Background Technology

[0002] Linear modules, also known as linear slides, are standardized linear motion systems that integrate power sources, transmission mechanisms, and guiding mechanisms. According to the driving method, linear modules are divided into three types: synchronous belt type, ball screw type, and linear motor type. The linear motor type uses a linear motor to directly convert electrical energy into mechanical energy for linear motion, resulting in fast response speed and high positioning accuracy.

[0003] Existing technology, such as application number 202011145753.2, entitled "Linear Transmission Positioning Device and Linear Transmission System," discloses a stator embedded in a first mounting groove of a base, a mover embedded in a second mounting groove of a base, with the mover and base covering the surface of the stator. The base is provided with a first sliding groove and a second sliding groove, and the base is installed in the mounting cavity of the base. The first sliding groove and the second sliding groove are connected to form a sliding space, and multiple balls are arranged in the sliding space to convert the sliding friction between the bases into rolling friction, thereby enabling the base to move relative to the base. Its disadvantages are that the overall structure is complex and inconvenient to disassemble and assemble. At the same time, in order to ensure the stability of the transmission process, the manufacturing precision and assembly precision requirements of the parts are high, resulting in greater processing and assembly difficulties and easy instability in the transmission process.

[0004] Therefore, existing technologies still need to be improved and enhanced. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a transmission mechanism for a linear motor with simple structure and stable transmission effect.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A transmission mechanism for a linear motor includes: a mounting frame defining a receiving space; a transmission base connected to the mounting frame via a transmission assembly to position the transmission base within the receiving space, the transmission base being movable along the length of the mounting frame; and a drive assembly, at least a portion of which is located within the receiving space, the drive assembly including a mover and a stator sequentially disposed below the transmission base, the mover being fixed to the transmission base, the stator being fixed to the mounting frame, and a height difference existing between the opposite end faces of the stator and the mover in the height direction of the mounting frame; the stator including a stator core and a winding coil disposed on the stator core, and the mover being a magnet.

[0007] The mounting sidewall of the mounting bracket is provided with a guide groove for mounting the transmission assembly, so as to guide the transmission seat to move along the length direction of the mounting bracket.

[0008] The transmission assembly includes a guide and a limiting member. The limiting member passes through the guide and is connected to the transmission seat to limit the guide on the guide groove and to position the transmission seat within the receiving space.

[0009] The guide component is a rolling bearing, and the limiting component is a threaded fastener.

[0010] The rolling bearing is a flange bearing, the threaded fastener is a screw, and the flange portion of the flange bearing is in contact with the outer side wall of the mounting bracket.

[0011] The outer ring of the flange bearing is in contact with the two side walls of the guide groove along the length direction.

[0012] The guide groove is waist-shaped.

[0013] At least one transmission component is provided on the guide groove.

[0014] Two guide components are provided on the guide groove.

[0015] The mounting bracket includes a horizontal section, the two ends of which are bent toward the same side to form two opposing mounting sidewalls; the mounting sidewalls extend along the bending direction of the horizontal section to form fixing ears, and the stator is connected to the fixing ears by screws.

[0016] Compared to existing technologies, this utility model provides a transmission mechanism for a linear motor, comprising: a mounting frame defining a receiving space; a transmission seat connected to the mounting frame via a transmission assembly, such that the transmission seat is located within the receiving space and is movable along the length direction of the mounting frame; and a drive assembly, at least a portion of which is located within the receiving space, the drive assembly comprising a mover and a stator sequentially disposed below the transmission seat, the mover being fixed to the transmission seat and the stator being fixed to the mounting frame, the opposite end faces of the stator and the mover having a height difference in the height direction of the mounting frame; the stator comprising a stator core and a winding coil disposed on the stator core, and the mover being a magnet.

[0017] This invention uses a transmission assembly to mount a transmission seat with a fixed mover within the accommodating space of a mounting frame. The magnetic field generated by the stator in the drive assembly interacts with the mover to drive the transmission seat to move. The structure is simple and easy to assemble and disassemble. The transmission assembly supports the transmission seat on the mounting frame and also works with the mounting frame to guide the transmission seat to move along the length of the mounting frame, thus improving the stability of the transmission seat during movement. Attached Figure Description

[0018] Figure 1 A schematic diagram of the transmission mechanism of a linear motor according to an embodiment of this utility model.

[0019] Figure 2 An exploded view of the transmission mechanism of a linear motor according to an embodiment of this utility model.

[0020] Attached icon number Mounting bracket 1, accommodating space 100, mounting side wall 11, guide groove 111, horizontal part 12, fixing ear 13, transmission seat 2, transmission assembly 3, guide 31, limiting part 32, flange bearing 33, screw 34, drive assembly 4, mover 41, stator 42, screw connector 43. Detailed Implementation

[0021] To make the objectives, technical solutions, and effects of this utility model clearer and more explicit, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0022] It should be noted that when a component is referred to as being "mounted on," "fixed to," or "set on" another component, it can be directly on the other component or may have an intervening component present. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or may have an intervening component present.

[0023] It should also be noted that the directional terms such as left, right, up, and down in the embodiments of this utility model are only relative concepts or are based on the normal use state of the product, and should not be considered as restrictive.

[0024] Linear modules, also known as linear slides, are standardized linear motion systems that integrate power sources, transmission mechanisms, and guiding mechanisms. According to the driving method, linear modules are divided into three types: synchronous belt type, ball screw type, and linear motor type. The linear motor type uses a linear motor to directly convert electrical energy into mechanical energy for linear motion, resulting in fast response speed and high positioning accuracy.

[0025] Existing technology, such as application number 202011145753.2, entitled "Linear Transmission Positioning Device and Linear Transmission System," discloses a stator embedded in a first mounting groove of a base, a mover embedded in a second mounting groove of a base, with the mover and base covering the surface of the stator. The base is provided with a first sliding groove and a second sliding groove, and the base is installed in the mounting cavity of the base. The first sliding groove and the second sliding groove are connected to form a sliding space, and multiple balls are arranged in the sliding space to convert the sliding friction between the bases into rolling friction, thereby enabling the base to move relative to the base. Its disadvantages are that the overall structure is complex and inconvenient to disassemble and assemble. At the same time, in order to ensure the stability of the transmission process, the manufacturing precision and assembly precision requirements of the parts are high, resulting in greater processing and assembly difficulties and easy instability in the transmission process.

[0026] This utility model provides a transmission mechanism for a linear motor. Please refer to [link / reference]. Figure 1 and Figure 2 The system includes: a mounting frame 1 defining a receiving space 100; a transmission seat 2 connected to the mounting frame 1 via a transmission assembly 3, such that the transmission seat 2 is located within the receiving space 100 and is movable along the length of the mounting frame 1; and a drive assembly 4, at least a portion of which is located within the receiving space 100. The drive assembly 4 includes a mover 41 and a stator 42 sequentially disposed below the transmission seat 2. The mover 41 is fixed to the transmission seat 2, and the stator 42 is fixed to the mounting frame 1. There is a height difference between the opposite end faces of the stator 42 and the mover 41 in the height direction of the mounting frame 1. The stator 42 includes a stator core and a winding coil disposed on the stator core. The mover 41 is a magnet.

[0027] This invention uses a transmission assembly 3 to mount a transmission seat 2 with a fixed mover 41 within the accommodating space 100 of a mounting frame 1. The magnetic field generated by the stator 42 in the drive assembly 4 interacts with the mover 41 to drive the transmission seat 2 to move. The structure is simple and easy to assemble and disassemble. The transmission assembly 3 supports the transmission seat 2 on the mounting frame 1 and also works with the mounting frame 1 to guide the transmission seat 2 to move along the length of the mounting frame 1, improving the stability of the transmission seat 2 during movement. Compared to the complex nested structures in the prior art, the connection between the mounting frame 1 and the drive component of the transmission seat 2 in this application is more direct, reducing the need for multi-layered nested structural design, making the overall structure simpler, greatly reducing the difficulty of disassembly and assembly, and improving maintenance and assembly efficiency. Furthermore, the simplified structure reduces transmission instability caused by improper assembly of multiple components.

[0028] It should be noted that the mover 41 can be fixed to the bottom of the transmission seat 2 by screwing, bonding or other connection methods. The transmission seat 2 is driven by the interaction force generated by the magnetic field of the mover 41 and the magnetic field of the stator 42, and moves along the length direction of the mounting frame 1. The drive assembly 4 composed of the mover 41 and the stator 42 is the prior art. The principle and structure of the drive assembly 4 will not be described in detail here.

[0029] Furthermore, the mounting sidewall 11 of the mounting bracket 1 is provided with a guide groove 111 for mounting the transmission assembly 3, so as to guide the transmission seat 2 to move along the length direction of the mounting bracket 1.

[0030] In this embodiment, the mounting frame 1 includes two opposing mounting sidewalls 11. A guide groove 111 is provided on the mounting sidewalls 11 along the length of the mounting frame 1. A transmission assembly 3 connected to both sides of the transmission seat 2 is provided on the guide groove 111 to mount the transmission seat 2 between the two mounting sidewalls 11. Specifically, one end of the transmission assembly 3 is screwed to the transmission seat 2, and the other end of the transmission assembly 3 rests on the guide groove 111. The guide groove 111 provides support for the transmission assembly 3, enabling the installation of the transmission seat 2 and ensuring its stable placement on the mounting frame 1. It also guides the movement direction of the transmission seat 2, providing a clear movement path for smoother movement. Furthermore, the cooperation between the guide groove 111 and the transmission assembly 3 ensures that the transmission seat 2 is located within the accommodating space 100, making the transmission mechanism more compact and reducing space occupation.

[0031] Furthermore, the transmission assembly 3 includes a guide 31 and a limiting member 32. The limiting member 32 passes through the guide 31 and is connected to the transmission seat 2 to limit the guide 31 on the guide groove 111 and to place the transmission seat 2 within the receiving space 100.

[0032] In this embodiment, transmission components 3 are provided on both sides of the transmission seat 2. The guide member 31 is located on the guide groove 111. One end of the limiting member 32 passes through the guide member 31 and is fixedly connected to the transmission seat 2. The other end of the limiting member 32 is placed on the guide groove 111 through the guide member 31. The transmission seat 2 is placed in the accommodating space 100 of the mounting component by the transmission components 3 on both sides. Through the cooperation of the guide member 31 and the guide groove 111, the transmission components 3 and the transmission seat 2 can move along the length direction of the mounting frame 1. The overall structure is simple and the transmission mechanism can be quickly disassembled and assembled. The cooperation of the guide groove 111 and the guide member 31 guides the movement of the transmission seat 2 and makes the movement of the transmission seat 2 more stable.

[0033] In one embodiment of this application, the guide member 31 is a rolling bearing, and the limiting member 32 is a threaded fastener. In this embodiment, transmission components 3 are provided on both sides of the transmission seat 2. One end of the threaded fastener passes through the rolling bearing and is screwed to the transmission seat 2 to fix it, so as to install the transmission seat 2 on the mounting bracket 1. The other end of the threaded fastener is located outside the rolling bearing to limit one side of the rolling bearing. An axial stop is provided in the guide groove 111 to limit the other side of the rolling bearing. The outer ring of the rolling bearing and the long side of the guide groove 111 are in vertical contact with each other. The threaded fastener has no threads at the part corresponding to the inner ring of the rolling bearing. When the transmission seat 2 moves, the rolling bearing makes the contact between the transmission component 3 and the guide groove 111 a rolling friction, which greatly reduces the frictional resistance. This not only makes the movement of the transmission seat 2 smoother and reduces energy loss, but also improves the transmission efficiency of the entire transmission mechanism. Furthermore, the threaded fasteners achieve reliable connection through the self-locking property of the threads, and can withstand certain axial and radial loads, ensuring that there is no relative displacement or loosening between the guide 31 and the transmission seat 2 during transmission, thus guaranteeing the reliability of the transmission assembly 3 connection. At the same time, the threaded connection is simple to assemble and disassemble, facilitating the assembly, maintenance, and component replacement of the transmission mechanism, reducing operating costs and maintenance difficulty.

[0034] It should be noted that, in this embodiment, the axial stop provided in the guide groove 111 can be a step formed by one long side of the guide groove 111 extending toward the side where the other long side is located, and both long sides extend to form axial baffles. The axial stop will not affect the synchronous movement of the limiting member 32 and the transmission seat 2.

[0035] In another embodiment of this application, the rolling bearing is a flange bearing 33, and the threaded fastener is a screw 34. The flange portion of the flange bearing 33 is fitted against the outer side wall of the mounting bracket 1. The flange bearing 33 adds a flange portion to a conventional bearing. This flange portion has a certain area and thickness. The flange portion is located on the outer side of the mounting component and fits against the outer side wall of the mounting bracket 1, providing a precise installation reference for the flange bearing 33. This ensures that the flange bearing 33 is accurately positioned on the mounting bracket 1. This precise positioning method avoids deviations in the movement trajectory of the transmission component 3 caused by deviations in the installation position of the rolling bearing, thereby reducing transmission deviations of the transmission seat 2 during movement and ensuring that the transmission seat 2 can move along a preset precise path, further improving the transmission accuracy of the transmission mechanism. The flange bearing 33 is placed on the guide groove 111. The front end of the screw 34 (i.e., the part near the tip or screw-in end) passes through the flange bearing 33 and is screwed and fixed to the transmission seat 2. The rear end of the screw 34 (i.e., the part near the head) is located on the outside of the flange. The rear end of the screw 34 is in contact with the outer end face of the flange, and the inner end face of the flange is in contact with the outer wall of the mounting bracket 1. The front end of the screw 34 passes through the flange bearing 33 and is screwed and fixed to the transmission seat 2, thus mounting the transmission seat 2 in the receiving space 100 of the mounting bracket 1. At the same time, the flange bearing 33 is confined on the guide groove 111 and the flange of the flange bearing 33 is tightly in contact with the outer wall of the mounting bracket 1. This connection method has a simple structure, is easy to disassemble and assemble, and can effectively resist the vibration and impact generated during the transmission process and limit the position of the flange bearing 33, preventing the flange bearing 33 from loosening or shifting during operation. The improved stability of the flange bearing 33 installation not only ensures the normal operation of the transmission mechanism but also reduces wear on the flange bearing 33, extending its service life and consequently the service life of the entire transmission mechanism. It should be noted that the screw 34 corresponding to the inner ring of the flange bearing 33 is not threaded to avoid damage to the flange bearing 33. In this embodiment, due to the presence of the flange and the limiting effect of the screw 34, the flange bearing 33 can be stably confined on the guide groove 111. Therefore, the openings on both sides of the guide groove 111 in this embodiment are the same size.

[0036] Furthermore, the outer ring of the flange bearing 33 is in close contact with the two side walls of the guide groove 111 along its length. In this embodiment, the two side walls of the guide groove 111 along its length are located on the upper and lower sides of the outer ring of the flange bearing 33. By limiting the upper and lower sides of the flange bearing 33, the transmission accuracy during the transmission process is improved. Because the outer ring of the flange bearing 33 is in close contact with the two side walls of the guide groove 111, the movement of the flange bearing 33 is more stable during the transmission process, and there will be no up-and-down vibration. The stability of the movement of the transmission component 3 can be transmitted to the transmission seat 2, making the transmission seat 2 more stable during the movement and reducing the overall vibration of the transmission mechanism. At the same time, the reduction of vibration can effectively reduce the noise generated during the transmission process, so as to avoid the transmission mechanism affecting the user's experience of using the product with the transmission mechanism in its application scenario.

[0037] Furthermore, the guide groove 111 is waist-shaped. The semi-circular structure at both ends of the waist-shaped guide groove 111 enables uniform stress distribution, effectively avoiding stress concentration problems. The uniform stress distribution reduces the risk of damage to the mounting bracket 1 at the guide groove 111, improves the structural strength of the mounting bracket 1, extends the service life of the mounting bracket 1, and thus extends the service life of the entire transmission structure. The machining technology of the waist-shaped guide groove 111 is relatively mature. Whether it is milling or stamping, the waist-shaped structure can be easily machined, and the machining accuracy and surface quality of the guide groove 111 can be guaranteed, ensuring a good fit with the outer ring of the flange bearing 33, which is beneficial to improving the stability of the transmission seat 2 during movement.

[0038] In this application, at least one transmission component 3 is provided on the guide groove 111, and the number of transmission components 3 on each guide groove 111 is the same. This ensures that the transmission components 3 on both sides are subjected to the same force, avoiding deformation and accelerated wear of one side's transmission component 3 due to excessive force, which would affect the normal operation and service life of the transmission mechanism. Preferably, in this embodiment of the application, two transmission components 3 are provided on a single guide groove 111; four transmission components 3 are provided on both sides of the transmission seat 2. The transmission seat 2 is mounted on the mounting bracket 1 by the four transmission components 3, which can better distribute the load after the transmission seat 2 is subjected to force, reduce the pressure on a single transmission component 3, and enhance the guiding effect on the transmission seat 2, ensuring the stability of the transmission seat 2 during movement.

[0039] Furthermore, the mounting bracket 1 includes a horizontal portion 12, the two ends of which are bent toward the same side to form two opposing mounting sidewalls 11; the mounting sidewalls 11 extend along the bending direction of the horizontal portion 12 to form fixing ears 13, and the stator 42 is connected to the fixing ears 13 by a screw connector 43.

[0040] In this embodiment, the horizontal portion 12 and the mounting sidewall 11 of the mounting bracket 1 form an integrally molded structure, creating a stable U-shaped frame that ensures the mounting bracket 1 will not deform when the transmission seat 2 is under stress. Two fixing ears 13 extend from each mounting sidewall 11. The design of the fixing ears 13 provides an independent and stable mounting base for the stator 42. The four fixing ears 13 disperse the stress on the fixing points of the stator 42, preventing structural damage caused by local stress concentration in the mounting bracket 1. The stator 42 is fixedly connected to the fixing ears 13 by screws, which is simple to disassemble and assemble, improving assembly efficiency. In addition, the connection method of the screw connector 43 facilitates the disassembly and maintenance of the stator 42 in the later stage. If the stator 42 fails, it can be replaced simply by unscrewing the screw connector 43 without damaging the structure of the mounting bracket 1, further improving the convenience of assembly and maintenance and reducing production and maintenance costs.

[0041] In summary, the present invention provides a transmission mechanism for a linear motor, comprising: a mounting frame defining a receiving space; a transmission seat connected to the mounting frame via a transmission assembly, such that the transmission seat is located within the receiving space and is movable along the length direction of the mounting frame; and a drive assembly, at least a portion of which is located within the receiving space, the drive assembly comprising a mover and a stator sequentially disposed below the transmission seat, the mover being fixed to the transmission seat and the stator being fixed to the mounting frame, the opposite end faces of the stator and the mover having a height difference in the height direction of the mounting frame; the stator comprising a stator core and a winding coil disposed on the stator core, and the mover being a magnet.

[0042] This invention uses a transmission assembly to mount a transmission seat with a fixed mover within the accommodating space of a mounting frame. The magnetic field generated by the stator in the drive assembly interacts with the mover to drive the transmission seat to move. The structure is simple and easy to assemble and disassemble. The transmission assembly supports the transmission seat on the mounting frame and also works with the mounting frame to guide the transmission seat to move along the length of the mounting frame, thus improving the stability of the transmission seat during movement.

[0043] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of the appended claims of this utility model.

Claims

1. A transmission mechanism for a linear motor, characterized in that, include: A mounting bracket defining a receiving space; a transmission seat connected to the mounting bracket via a transmission assembly to position the transmission seat within the receiving space, the transmission seat being movable along the length of the mounting bracket; a drive assembly, at least a portion of which is located within the receiving space, the drive assembly including a mover and a stator sequentially disposed below the transmission seat, the mover being fixed to the transmission seat, the stator being fixed to the mounting bracket, and a height difference existing between the opposite end faces of the stator and the mover in the height direction of the mounting bracket; the stator including a stator core and a winding coil disposed on the stator core, the mover being a magnet.

2. The transmission mechanism of the linear motor according to claim 1, characterized in that, The mounting sidewall of the mounting bracket is provided with a guide groove for mounting the transmission assembly, so as to guide the transmission seat to move along the length direction of the mounting bracket.

3. The transmission mechanism of the linear motor according to claim 2, characterized in that, The transmission assembly includes a guide and a limiting member. The limiting member passes through the guide and is connected to the transmission seat to limit the guide on the guide groove and to position the transmission seat within the receiving space.

4. The transmission mechanism of the linear motor according to claim 3, characterized in that, The guide component is a rolling bearing, and the limiting component is a threaded fastener.

5. The transmission mechanism of the linear motor according to claim 4, characterized in that, The rolling bearing is a flange bearing, the threaded fastener is a screw, and the flange portion of the flange bearing is in contact with the outer side wall of the mounting bracket.

6. The transmission mechanism of the linear motor according to claim 5, characterized in that, The outer ring of the flange bearing is in contact with the two side walls of the guide groove along the length direction.

7. The transmission mechanism of the linear motor according to claim 6, characterized in that, The guide groove is waist-shaped.

8. The transmission mechanism of the linear motor according to claim 2, characterized in that, At least one transmission component is provided on the guide groove.

9. The transmission mechanism of the linear motor according to claim 8, characterized in that, Two guide components are provided on the guide groove.

10. The transmission mechanism of the linear motor according to claim 1, characterized in that, The mounting bracket includes a horizontal section, the two ends of which are bent toward the same side to form two opposing mounting sidewalls; the mounting sidewalls extend along the bending direction of the horizontal section to form fixing ears, and the stator is connected to the fixing ears by screws.

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