Linear motor

Abstract

The present invention relates to a linear motor. By means of the provision of a sealing module, a mover is sealed well when operating on a stator slide rail, and external fine dust does not easily enter a sealed space, thereby avoiding affecting of the operation precision and stability performance of the linear motor; a lubrication module is connected to the sealed space, so that the linear motor can be effectively lubricated during working, thereby further improving the operation precision and stability performance of the linear motor; ball return end covers and a first slideway together form circulating channels for ball movement, a ball retaining plate cooperates with the mover by means of a positioning surface, thereby improving the mounting precision of the ball retaining plate, and the upper and lower sides of the positioning surface are provided with contact surfaces for limiting balls, so that one ball retaining plate can be used by two side-by-side circulating channels, avoiding the need to additionally provide more ball retaining plates, thereby improving the operation precision and stability performance of the linear motor.

Description

A linear motor Technical Field

[0001] The present invention relates to the technical field of travel drive devices, and in particular to a linear motor. Background Art

[0002] A linear motor is a transmission device that converts electrical energy directly into linear motion without any intermediate conversion mechanism. It can be thought of as a rotary motor cut radially and flattened into a flat surface. Linear motors are also known as linear motors, linear motors, linear motors, and push rod motors. The most commonly used types of linear motors are flat plate, U-slot, and tubular.

[0003] A ball cage is a structure in a ball linear motor that helps keep the balls on their predetermined tracks and maintain smooth rolling motion. Conventional ball linear motors often feature at least two rows of rotating ball channels to achieve good travel accuracy and stable performance. To maintain contact between the balls and the tracks, a matching number of ball cages is typically used to match the number of rotating ball channels. However, ball cages themselves have inherent machining precision and installation tolerances. Installing multiple ball cages significantly impacts the linear motor, leading to reduced accuracy and stability.

[0004] Summary of the Invention

[0005] In order to solve the defect that multiple ball retainers reduce the running accuracy and stability of the linear motor, the present invention proposes a linear motor.

[0006] The technical solution adopted by the present invention is a linear motor, comprising a stator slide rail and a mover slidingly engaged with the stator slide rail, and further comprising:

[0007] A sealing module is provided on the mover and slides and seals with the stator slide rail. The mover, the stator slide rail and the sealing module together form a sealed space.

[0008] Ball return end caps are provided at both ends of the mover. Each ball return end cap is provided with a ball return channel. The ball return channel and the first slideway together form a circulation loop for the ball movement.

[0009] A lubrication module is provided on the linear motor and is connected to the sealed space;

[0010] The ball retaining plate includes a positioning surface that cooperates with the mover, and contact surfaces of the limiting balls are arranged on the upper and lower sides of the positioning surface.

[0011] Preferably, the positioning surface has a strip-shaped recess and / or a strip-shaped protrusion arranged along the sliding direction of the mover, and the mover is provided with a matching portion, which is plug-fitted with the strip-shaped recess and / or the strip-shaped protrusion of the positioning surface.

[0012] Preferably, the mover and the ball retaining plate together form a first slideway with a contact notch, the contact notch is opened along the sliding direction of the mover, the balls are constrained in the first slideway, and each ball partially passes through the contact notch and contacts the stator slide rail.

[0013] Preferably, the ball retaining plate is symmetrical up and down, and the contact notch is symmetrical along the symmetry plane of the ball retaining plate.

[0014] Preferably, the contact notch located on the upper side of the positioning surface opens obliquely upward; the contact notch located on the lower side of the positioning surface opens obliquely downward.

[0015] Preferably, the ball is close to the upper half or the lower half of one side of the stator slide rail and contacts the stator slide rail.

[0016] Preferably, the ball return channel has a first return port and a second return port, and the ball return end cover is provided with an oil channel connected to the outside, and the oil channel is connected to the ball return channel.

[0017] Preferably, the ball-returning channel is provided with a groove structure that is recessed inward away from the ball-returning channel, and the groove structure is arranged along the ball-returning path direction of the ball-returning channel.

[0018] Preferably, the sealing module includes a first sealing unit, the mover is connected to the first sealing unit in sealing contact with the stator slide rail, the first sealing unit extends to both ends along the sliding direction of the mover and abuts against both ends of the mover, and the mover, the first sealing unit and the stator slide rail form a sealed space.

[0019] Preferably, the lubrication module includes an oil box, an oil guide component and a lubrication unit. The linear motor is connected to an oil box having an oil storage chamber. The oil storage chamber is provided with an oil guide component. The oil guide component has a buffer surface and an oil inlet end extending to the opposite side of the buffer surface. The oil guide component is connected to a lubrication unit for lubricating the linear motor.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present application discloses a linear motor, comprising a stator slide rail and a mover slidingly engaged with the stator slide rail, and further comprising: a sealing module, which is arranged on the mover and slidingly sealed with the stator slide rail, wherein the mover, the stator slide rail and the sealing module jointly form a sealed space; a ball return end cover, wherein both ends of the mover are provided with a ball return end cover, each ball return end cover is provided with a ball return channel, and the ball return channel and the first slide rail jointly form a circulating loop for ball movement; a lubrication module, which is arranged on the linear motor and connected to the sealed space; a ball retaining plate, wherein the ball retaining plate comprises a positioning surface engaged with the mover, and contact surfaces for limiting balls are provided on the upper and lower sides of the positioning surface. The sealing module is provided so that the mover is well sealed when running on the stator slide rail, and fine dust from the outside is not easy to enter the sealed space and affect the running accuracy and stability of the linear motor; the lubrication module is connected to the sealed space, so that the linear motor can be effectively lubricated during operation, further improving the running accuracy and stability of the linear motor; the ball return end cover and the first slide together form a circulation loop for the ball movement, and the ball retaining plate cooperates with the mover through the positioning surface, thereby improving the installation accuracy of the ball retaining plate. At the same time, contact surfaces for limited position balls are provided on both the upper and lower sides of the positioning surface, so that one ball retaining plate can be used for two row-by-row circulation loops, avoiding the need to add more ball retaining plates, thereby improving the running accuracy and stability of the linear motor. Compared with the prior art, the linear motor disclosed in this application can achieve the purpose of improving the running accuracy and stability of the linear motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is described in detail below with reference to the embodiments and accompanying drawings, in which:

[0023] FIG1 shows a schematic structural diagram of a linear motor provided by an embodiment of the present invention;

[0024] FIG2 shows a schematic structural diagram of an oil guide component in a linear motor according to FIG1 ;

[0025] FIG3 shows a cross-sectional view of a linear motor according to FIG1 ;

[0026] FIG4 shows a schematic structural diagram of a mover (partial structure removed) in a linear motor according to FIG1 ;

[0027] FIG5 shows an enlarged view of area A in a linear motor according to FIG4 ;

[0028] FIG6 shows a schematic structural diagram of a linear motor mover without the oil guide component and the lubrication unit according to FIG4 ;

[0029] FIG7 shows a schematic structural diagram of a mover in a linear motor provided by an embodiment of the present invention;

[0030] FIG8 shows a schematic structural diagram of a ball retaining plate in a linear motor according to FIG7 ;

[0031] FIG9 shows a side view of a linear motor according to FIG7 ;

[0032] FIG10 shows a schematic structural diagram of a ball return end cover in a linear motor provided by an embodiment of the present invention;

[0033] FIG11 shows a schematic structural diagram of a ball return end cover according to FIG10 in another direction;

[0034] FIG12 shows a schematic structural diagram of a ball return plate in a ball return end cover according to FIG10 ;

[0035] FIG13 shows a schematic structural diagram of the ball return plate in the ball return end cover according to FIG12 in another direction;

[0036] FIG14 shows a schematic structural diagram of an end cover plate in a ball return end cover according to FIG10 ;

[0037] FIG15 shows a schematic structural diagram of a stator in a linear motor according to an embodiment of the present invention;

[0038] FIG16 shows a schematic structural diagram of a linear motor (excluding the second sealing unit and part of the structure on the left) provided according to an embodiment of the present invention;

[0039] FIG17 shows a right side view of a linear motor with a stator slide rail according to FIG16 ;

[0040] FIG18 shows an enlarged view of area B in a linear motor according to FIG16 ;

[0041] FIG. 19 shows an enlarged view of region C in a linear motor according to FIG. 17 .

[0042] Description of labels:

[0043] 10. Stator slide rail; 11. Track; 12. Sliding surface;

[0044] 20. Mover; 21. Ball slideway; 22. Contact notch; 23. Mounting mating portion;

[0045] 30. Sealing module; 31. First sealing unit; 311. Warped end; 312. Slot; 313. Positioning protrusion; 314. Slot; 315. First sealing member; 316. Second sealing member; 32. Second sealing unit;

[0046] 40. Lubrication module; 41. Oil box; 411. Oil storage chamber; 412. Oil coating chamber; 413. Oil guide component; 4131. Buffer surface; 4132. Oil introduction end; 414. Blocking portion; 415. End seal; 416. Oil baffle; 417. Positioning protrusion; 43. Lubrication unit; 431. First end; 432. Second end;

[0047] 50. Ball retaining plate; 51. Contact surface; 52. Positioning surface; 53. Bar protrusion; 54. Mounting hole; 55. Second mating surface;

[0048] 60. Ball return end cover; 601. End cover body; 602. End cover plate; 603. Ball return plate; 604. Second limiting portion; 61. Ball return channel; 62. First return port; 63. Second return port; 64. Oil channel; 641. First oil inlet; 642. Second oil inlet; 643. Connecting port; 65. Groove structure; 66. Mounting portion; 661. Notch; 662. First limiting portion. DETAILED DESCRIPTION

[0049] To make the objectives, technical solutions, and advantages of the present invention more apparent, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Examples of embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0050] The present invention discloses a linear motor, which includes a stator rail 10 and a mover 20 that is slidably engaged with the stator rail 10, and further includes:

[0051] The sealing module 30 is provided on the mover 20 and slides and seals with the stator slide rail 10. The mover 20, the stator slide rail 10 and the sealing module 30 together form a sealed space;

[0052] Ball return end caps 60 are provided at both ends of the mover 20. Each ball return end cap 60 is provided with a ball return channel 61. The ball return channel 61 and the first slideway together form a circulation loop for the ball to move.

[0053] A lubrication module 40 is provided on the linear motor and communicates with the sealed space;

[0054] The ball retaining plate 50 includes a positioning surface 52 that cooperates with the mover 20 , and contact surfaces 51 for limiting balls are provided on both the upper and lower sides of the positioning surface 52 .

[0055] The sealing module 30 is provided so that the mover 20 is well sealed when running on the stator slide rail 10, and small dust from the outside is not easy to enter the sealed space and affect the running accuracy and stability of the linear motor; the lubrication module 40 is connected to the sealed space, so that the linear motor can be effectively lubricated during operation, further improving the running accuracy and stability of the linear motor; the ball return end cover 60 and the first slide together form a circulation loop for the ball movement, and the ball retaining plate 50 cooperates with the mover 20 through the positioning surface 52, thereby improving the installation accuracy of the ball retaining plate 50. At the same time, contact surfaces 51 for limiting the position of the ball are provided on both the upper and lower sides of the positioning surface 52, so that one ball retaining plate 50 can be used for two row-by-row circulation loops, avoiding the need to add more ball retaining plates 50, thereby improving the running accuracy and stability of the linear motor. Compared with the prior art, the linear motor disclosed in the present application can achieve the purpose of improving the running accuracy and stability of the linear motor.

[0056] It should be noted that the sealing module 30 prevents tiny dust particles and oil from entering the linear motor by isolating the mover 20 from the external environment. The lubrication module 40 lubricates the mover 20 and stator rail 10 with lubricants such as lubricating oil, thereby reducing friction between them and improving operational accuracy and stability. The ball retaining plate 50 improves the linear motor's operational accuracy and stability by modifying its own structure and assembly with the mover 20. Optimizing the linear motor from these different dimensions results in higher precision and stability. Engineering testing demonstrates that this is not simply a cumulative effect; it also results in improved precision and stability.

[0057] The ball retaining plate 50 is a component that comes into close contact with the balls, so its installation accuracy significantly affects the operating accuracy of the linear motor. Even a slight deviation or tilt of the ball retaining plate 50 can significantly affect the friction coefficient between the balls and the stator rail 10. Therefore, improving the installation accuracy of the ball retaining plate 50 is crucial. This application improves installation accuracy by providing a positioning surface 52 on the ball retaining plate 50 that mates with the mover 20. The positioning surface 52 can be any shape that allows the ball retaining plate 50 to be properly positioned, ensuring good ball retention and positioning.

[0058] In addition, contact surfaces 51 are provided on the upper and lower sides of the positioning surface 52 on the ball retaining plate 50. The contact surfaces 51 on the upper and lower sides enable the ball retaining plate 50 to limit the balls on both the upper and lower sides, without the need for a ball retaining plate 50 for each circulation loop, so as to prevent excessive ball retaining racks from causing the operating accuracy of the linear motor to decrease due to their processing accuracy and installation deviation; secondly, since the balls are located on both sides of the ball retaining plate 50, they have a supporting effect on the ball retaining plate 50, so that the ball retaining plate 50 itself is not easy to deform or bend; thirdly, the balls are located on both sides of the ball retaining plate 50, so the ball retaining plate 50 is equivalent to double-track positioning when installed on the stator slide rail 10, thereby having a better limiting effect on the mover 20. And when the mover 20 vibrates, the balls at the upper and lower ends will also vibrate slightly with the ball retaining plate 50. Since the ball retaining plate 50 has balls at both the upper and lower ends, the inertia required for it to shake is greater, and it is more difficult to vibrate, thereby enhancing the stability performance and operation accuracy of the linear motor.

[0059] In some embodiments, please refer to Figures 7 to 9, the positioning surface 52 has a strip-shaped recess and / or strip-shaped protrusion 53 arranged along the sliding direction of the mover 20, and the mover 20 is provided with a matching part, and the matching part and the strip-shaped recess and / or strip-shaped protrusion 53 of the positioning surface 52 are plugged into each other.

[0060] Specifically, the positioning surface 52 includes a strip-shaped depression and / or protrusion 53 arranged along the sliding direction of the mover 20. The strip-shaped depression and / or protrusion 53 engages with the mating portion provided on the mover 20 through plug-in engagement. Compared to other shapes, the strip-shaped depression and / or protrusion 53 have a larger mating area, resulting in higher structural strength. This effectively prevents the ball retaining plate 50 from tilting or shifting, which could affect the linear motor's operating accuracy. It should be noted that the positioning surface 52 can include both the strip-shaped depression and protrusion 53, thereby preventing misalignment when mating with the mating portion, providing a foolproofing feature.

[0061] In some embodiments, please refer to Figures 7 to 9. The mover 20 and the ball retaining plate 50 jointly form a first slideway with a contact notch 22. The contact notch 22 is opened along the sliding direction of the mover 20. The balls are constrained in the first slideway, and each ball has a portion passing through the contact notch 22 to contact the stator slide rail 10.

[0062] It should be noted that the mover 20 and the ball retaining plate 50 together form a first slideway having a contact notch 22. The contact notch 22 is provided along the sliding direction of the mover 20. The balls can move in contact with the stator rail 10 through the contact notch 22, thereby allowing the mover 20 to operate on the stator rail 10. By forming the ball retaining plate 50 as part of the first slideway, the mover 20 can be more easily assembled with the balls, while also effectively reducing the size of the mover 20, making the linear motor more compact.

[0063] In some specific embodiments, referring to FIG. 7 to FIG. 9 , the ball retaining plate 50 is symmetrical in the vertical direction, and the contact notch 22 is symmetrical along the symmetry plane of the ball retaining plate 50 .

[0064] Specifically, the vertical symmetry of the ball retaining plate 50 provides greater structural strength while also preventing variations in the linear motor's operating accuracy due to asymmetry when the linear motor is used in different postures. Furthermore, the contact notches 22 are symmetrical along the plane of symmetry of the ball retaining plate 50. This symmetrical arrangement of the contact notches 22 ensures more stable contact between the ball bearings and the stator rail 10, resulting in improved operational stability.

[0065] In some more specific embodiments, referring to FIG. 7 to FIG. 9 , the contact notch 22 located on the upper side of the positioning surface 52 opens obliquely upward; the contact notch 22 located on the lower side of the positioning surface 52 opens obliquely downward.

[0066] It should be noted that the opening direction of the contact notch 22 on the upper side of the positioning surface 52 is facing obliquely upward, and the opening direction of the contact notch 22 on the lower side of the positioning surface 52 is facing obliquely upward. Through the above arrangement, the balls on the upper and lower sides form an "eight" shape when in contact with the stator slide rail 10, so that the mover 20 can be more stably set on the stator slide rail 10, and is not prone to vibration or shaking, and has higher stability, thereby making the linear motor more accurate and more stable during operation.

[0067] Preferably, the shape of the contact point between the stator rail 10 and the ball matches the shape of the ball, thereby achieving higher operational stability.

[0068] In some specific embodiments, referring to FIG. 7 to FIG. 9 , the upper half or the lower half of the ball bearing close to the stator rail 10 contacts the stator rail 10 .

[0069] It should be noted that the upper half or lower half of the ball bearing close to the stator rail 10 contacts the stator rail 10 , which can reduce the overall size of the linear motor on the one hand and make the ball bearing more stable during movement on the other hand.

[0070] In some embodiments, referring to Figures 7 to 9, the ball retaining plate 50 has a mounting hole 54, and the ball retaining plate 50 is connected to the mover 20 through the mounting hole 54, thereby making it more stable and secure.

[0071] 7 to 9 , a second mating surface 55 having the same shape as the stator rail 10 is provided on the opposite side of the positioning surface 52. This makes the shape of the ball retaining plate 50 fuller and the mover 20 and the stator rail 10 closer together.

[0072] In some embodiments, referring to Figures 7 to 9, the end of the ball retaining plate 50 abuts against the ball return end cap 60 to achieve better sealing performance.

[0073] In some embodiments, referring to FIG. 10 to FIG. 15 , the ball return channel 61 has a first return port 62 and a second return port 63 , and the ball return end cover 60 is provided with an oil passage 64 communicating with the outside, and the oil passage 64 is connected to the ball return channel 61 .

[0074] The end cap body 601 is provided with a ball return channel 61, through which balls can enter and exit through a first return port 62 and exit and enter through a second return port 63. Furthermore, by providing an oil passage 64 on the end cap body 601 and connecting it to the ball return channel 61, lubricating oil can directly reach the interior of the ball circulation rail on the mover 20, effectively lubricating the balls. Simultaneously, the lubricating oil also effectively lubricates the ball return channel 61, making the ball return of the ball return end cap 60 smoother.

[0075] It should be noted that, compared to other structural components on the mover 20, the ball return end cap 60 is the component that is in closest contact with the ball. Its contact surface 51 with the ball is larger, and the rotational motion of the ball in the ball return end cap 60 is richer than that in other locations. Therefore, providing the oil passage 64 on the ball return end cap 60 can better lubricate the ball. Furthermore, precisely because the ball return end cap 60 is in closest contact with the ball, the ball is very likely to become stuck in the ball return end cap 60. Therefore, by providing the oil passage 64 on the ball return end cap 60 and connecting it to the ball return channel 61, the ball return channel 61 can be effectively lubricated, making the ball return of the ball return end cap 60 smoother.

[0076] It should also be noted that since the oil passage 64 is provided on the end cap body 601, the need for an additional lubrication structure to provide the oil passage 64 is eliminated. This allows the end cap body 601 to perform a lubrication function in addition to the conventional function of the rotating ball bearing. Furthermore, since the present application avoids the need for an additional lubrication structure, the disclosed ball-returning end cap 60 can be reduced in size, making the overall structure more compact.

[0077] Specifically, this embodiment does not limit the specific location of the oil passage 64 in the ball return passage 61. The oil passage 64 can be connected to the middle of the ball return passage 61, or to either side of the middle of the ball return passage 61. Of course, it can also be connected to the first return port 62 or the second return port 63, thereby achieving lubrication of the ball and the ball return passage 61. Since the ball carries the lubricating oil, it can also lubricate other locations when the ball moves to other locations.

[0078] The present application does not limit the shape of the end cover body 601. The shape of the end cover body 601 in the drawings of the present application is only one embodiment of the present application. In other embodiments, the shape of the end cover body 601 can be a centrally symmetrical figure, so that both sides of the end cover body 601 can be connected to other structures such as the mover 20. In addition, in other embodiments, the first return port 62 and the second return port 63 are of the same shape and size, and are positioned symmetrically relative to the center of the end cover body 601, so that the operator can choose which of the first return port 62 and the second return port 63 is closer to the stator slide rail 10, or choose the upper and lower positions of the first return port 62 and the second return port 63. It should also be noted that there is at least one ball return channel 61, and the number of first return ports 62 and the number of second return ports 63 match the number of ball return channels 61.

[0079] Furthermore, the oil passage 64 can be disposed within the end cap body 601 and can be sealed from the external structure by means of the groove 314 to form the oil passage 64. Alternatively, the oil passage 64 can be disposed within the end cap body 601 at one section and provided as the groove 314 at another section. In some embodiments, when the oil passage 64 transitions from being a channel disposed within the end cap body 601 to being provided as the groove 314, the channel 64 is connected via the connecting port 643, and the lubricating oil flows sequentially through the internal channel, the connecting port 643, and the groove 314 to the ball return passage 61.

[0080] Specifically, the oil passage 64 can be connected to the outside by connecting to an external pipeline at the location where it connects to the outside, through which lubricating oil enters the oil passage 64. Alternatively, an oil box 41 can be provided at the location where it connects to the outside, storing lubricating oil that can flow into the oil passage 64, thereby achieving lubrication. In other embodiments, an oil reservoir can be provided within the oil passage 64 to store lubricating oil. During the movement of the mover 20, the lubricating oil in the reservoir can be applied to the ball bearings to achieve lubrication. When the lubricating oil in the reservoir is exhausted, it is necessary to replenish the lubricating oil at the location where it connects to the outside. Obviously, other structures can also be used to allow lubricating oil to enter the oil passage 64 from the outside.

[0081] In some embodiments, referring to FIG. 10 to FIG. 14 , the oil passage 64 is connected to the first return port 62 .

[0082] Specifically, the oil passage 64 connects to the first return port 62. Of the two return ports in this embodiment, the one connected to the oil passage 64 is the first return port 62, and the other is the second return port 63. By placing the oil passage 64 at the first return port 62, the balls have more opportunities for lubrication within the ball return channel 61, allowing them to be lubricated from the moment they enter the ball return channel 61, resulting in a more effective lubrication. It should be noted that the mover 20 can move back and forth on the stator rail 10, so the balls always have the opportunity to enter through the first return port 62 and exit through the second return port 63.

[0083] The location of the first direction port can be a slot 314 provided in the first return port 62, a through hole in the sidewall of the first return port 62 that communicates with the oil passage 64, or a lubricating ring provided circumferentially around the first return port 62, thereby connecting the oil passage 64 to the first return port 62. It should be noted that the location of the first return port 62 or the second return port 63 refers to a portion of the area near the ball inlet and outlet, and does not refer solely to the location of the ball inlet and outlet.

[0084] In some embodiments, please refer to Figures 10 to 14, the first return port 62 and the second return port 63 are arranged horizontally, the first return port 62 is set away from the stator slide rail 10, and the second return port 63 is set close to the stator slide rail 10, so that the ball can immediately slide in contact with the stator slide rail 10 after being lubricated with lubricating oil. On the one hand, more lubricating oil can be carried to the stator slide rail 10, and on the other hand, the ball is fully lubricated in the ball return channel 61. From the above two aspects, the ball return end cover 60 can have a better lubrication effect on the linear motor, and the ball return process of the ball return end cover 60 is smoother, thereby improving the operating accuracy of the linear motor.

[0085] In other embodiments, the first return port 62 and the second return port 63 are arranged horizontally, the first return port 62 is set close to the stator slide rail 10, and the second return port 63 is set away from the stator slide rail 10, so that the ball contacts the stator slide rail 10 immediately after being lubricated at the first return port 62, so that the stator slide rail 10 can obtain more lubricating oil. In this embodiment, the stator slide rail 10 can be evenly lubricated.

[0086] When the balls are lubricated, each ball is evenly lubricated without uneven lubrication. Therefore, when the balls come into contact with the stator rail 10, the stator rail 10 can also obtain a more even lubrication effect.

[0087] In some specific embodiments, referring to FIG. 10 to FIG. 14 , the oil passage 64 is a groove 314 opened on the surface of the end cover body 601 and extending to the first return port 62 . The groove 314 is configured to seal with an external structure to form the oil passage 64 .

[0088] Specifically, the oil passage 64 is a slot 314 formed on the surface of the end cap and extending to the first return port 62. The slot 314 can be combined with the external structure to seal and form the oil passage 64. The design of the slot 314 can, on the one hand, reduce the difficulty of forming the oil passage 64 on the end cap body 601 and the number of processing steps, especially for the case where a branch of the oil passage 64 is required, as the processing difficulty of the branch oil passage 64 is more complicated. On the other hand, the design of the slot 314 can make it more convenient for operators to clean up oil stains. For some linear motor return ball end caps 60 that are not frequently used, if lubricating oil accumulates in the oil passage 64 for too long, it may cause blockage of the oil passage 64. The design of the slot 314 can greatly facilitate the cleaning operation of the operator.

[0089] In addition, due to the open structure of the slot 314, if the operator needs to control the flow of the lubricating oil, he can easily add a flow control structure in the slot 314, such as an additional gasket, to control the output of the lubricating oil by changing the cross-sectional area of ​​the oil channel 64.

[0090] Since the grooves 314 are provided on the surface of the end cover body 601 , the structural strength of the end cover body 601 is increased, and the end cover body 601 is less prone to deformation and damage.

[0091] In some specific embodiments, referring to FIG. 1 to FIG. 12 , the first return opening 62 protrudes outward away from the end cover body 601 to form a mounting portion 66 .

[0092] Specifically, the first return port 62 protrudes outward from the end cap body 601 to form a mounting portion 66. The provision of mounting portion 66 facilitates installation with the mover 20, simplifying assembly and also serving as a position limiter. Furthermore, the provision of mounting portion 66 enhances the sealing performance between the ball return end cap 60 and the mover 20, preventing lubricating oil from leaking.

[0093] Preferably, a first limiting portion 662 is further provided at the mounting portion 66. The first limiting portion 662 can prevent the mounting portion 66 from rotating when mounted on the mover 20, thereby improving the mounting accuracy of the ball return end cover 60.

[0094] In some embodiments, referring to FIG11 , a second stopper 604 is provided on the end cap body 601 to provide a tighter fit between the ball return end cap 60 and other structures. Preferably, the second stopper 604 is formed as two protrusions, which can be integrally formed with the ball return end cap 60.

[0095] Preferably, a mounting fitting portion 23 may be provided on the mover 20 , and the mounting portion 66 and the mounting fitting portion 23 may cooperate with each other, thereby achieving a better sealing effect and a better connection and fixing effect of the ball return end cover 60 .

[0096] In other embodiments, a mounting portion 66 protruding outward away from the end cover body 601 may also be provided at the second return opening 63 .

[0097] In some embodiments, the end cover body 601 has a through hole, and an operator can use bolts to fix the end cover body 601 and the mover 20 .

[0098] In some more specific embodiments, referring to FIG. 10 , FIG. 12 and FIG. 13 , the mounting portion 66 is provided with a notch 661 , and the oil passage 64 is in communication with the notch 661 .

[0099] Furthermore, the mounting portion 66 is provided with a notch 661, and the oil passage 64 is connected to the notch 661. Providing an opening in the mounting portion 66 avoids the need for a hole to be located elsewhere in the first return port 62. It should be noted that during the ball return process, the rotating ball will exert a certain degree of impact force on the ball return end cap 60, particularly at the location where the ball changes direction, i.e., the rotation of the ball return passage 61. Therefore, providing the hole connected to the oil passage 64 in the notch 661 of the mounting portion 66 can prevent damage from the impact force of the ball, thereby enhancing the structural strength and thereby extending the service life of the ball return end cap 60.

[0100] In some embodiments, referring to FIG. 10 to FIG. 14 , at least two ball return channels 61 are provided, and the plurality of ball return channels 61 are all connected to the oil channel 64 .

[0101] Specifically, the stability of the mover 20 during operation is higher when at least two ball return channels 61 are provided compared to when a single ball return channel 61 is provided. However, it should be noted that the number of ball return channels 61 is limited by the manufacturing cost and the size of the mover 20. Therefore, the number of ball return channels 61 needs to be selected according to specific needs.

[0102] The plurality of ball return channels 61 are all connected to the oil channel 64 , so that each ball return channel 61 can be lubricated by the lubricating oil.

[0103] Preferably, referring to Figures 10 and 12 , the oil passage 64 includes a main oil passage 64 and at least two branch oil passages 64. One end of the main oil passage 64 is connected to the outside, and the other end is connected to multiple branch oil passages 64. This allows lubricating oil to be added from a single location within the main oil passage 64. In other embodiments, a branch oil passage 64 may be connected to another branch oil passage 64 to achieve flow control.

[0104] In other embodiments, there may be multiple oil passages 64 , which are respectively connected to multiple ball return passages 61 , or multiple oil passages 64 are connected to different positions in one ball return passage 61 .

[0105] In some embodiments, referring to Figures 10, 11, 14 and 15, the end cover body 601 has a first oil inlet 641, the end cover body 601 is connected to the oil box 41, and the oil box 41, the first oil inlet 641 and the oil channel 64 are connected in sequence.

[0106] It should be noted that a first oil inlet 641 is provided on the end cover body 601, and the first oil inlet 641 can be integrated with the external oil box 41, and can realize the lubrication function by itself without the need for other external components, which is beneficial to reducing the size of the mover 20 and making the overall structure more compact.

[0107] Preferably, please refer to Figures 10, 11, 14 and 15. The end cover body 601 also has a second oil inlet 642, which can be connected to an external pipeline for adding lubricating oil. The end cover body 601 is provided with a first oil inlet 641 and a second oil inlet 642, which can be selected according to the specific usage requirements of the user, thereby improving the adaptability of the return ball end cover 60.

[0108] The present application also discloses a linear motor, please refer to Figure 15, including a stator slide rail 10 and a mover 20 slidingly fitted on the stator slide rail 10, including the above-mentioned ball return end cover 60, and the ball return end cover 60 is connected to the mover 20.

[0109] By being equipped with the ball return end cover 60 disclosed in the present application, the linear motor can achieve the goals of better lubrication effect, better ball return effect, higher precision, smaller size and more compact structure.

[0110] In some embodiments, referring to FIG. 10 , FIG. 12 and FIG. 13 , the ball return channel 61 is provided with a groove structure 65 that is recessed inward away from the ball return channel 61 , and the groove structure 65 is provided along the ball return path direction of the ball return channel 61 .

[0111] It should be noted that by providing a groove structure 65 in the ball return channel 61 that is recessed inward away from the ball return channel 61 and arranged along the ball return path of the ball return channel 61, the groove structure 65 can play a certain guiding role for the balls, and to a certain extent can share some of the pressure concentrated on the walls of the ball return channel 61, thereby achieving a better ball return effect for the ball return end cap 60. Preferably, the groove structure 65 is provided at the bottom and / or top of the ball return channel 61. Due to the self-weight of the balls, the placement of the groove structure 65 at the bottom and / or top of the ball return channel 61 can further improve the ball return effect.

[0112] It should be explained that the size of the groove structure 65 relative to the ball return channel 61 cannot be too large, otherwise when most of the ball is sunk into the groove structure 65, a better ball return effect cannot be achieved.

[0113] Preferably, referring to Figures 10, 12, and 13, the groove structure 65 is a chamfered structure. Compared to the groove structure 65, the chamfered structure has a smoother contact surface 51 with the ball, and has higher structural strength and is less prone to damage. Specifically, the angle range of the chamfered structure is 10° to 80° (the normal chamfer angle range is 0° to 90°).

[0114] In some embodiments, referring to FIG. 10 to FIG. 14 , the end cover body 601 includes an end cover plate 602 and a ball return plate 603 , and the end cover plate 602 and the ball return plate 603 together form a ball return channel 61 .

[0115] During the movement of the mover 20, the impact force of the ball is mainly concentrated on the rear end of the end cover body 601, so the end cover plate 602 is more susceptible to damage than the ball return plate 603. Therefore, by separating the end cover body 601 into the end cover plate 602 and the ball return plate 603, the purpose of facilitating the replacement of wearing parts can be achieved.

[0116] In some specific embodiments, please refer to Figures 10 to 14, one of the end cover plate 602 and the ball return plate 603 is provided with a groove structure 65 recessed inward away from the ball return channel 61 at the joint position of the two, and the groove structure 65 is arranged along the ball return path direction of the ball return channel 61.

[0117] Specifically, if the end cap body 601 is integrally formed, it would be more difficult to create the groove structure 65. However, the independent configuration of the end cap plate 602 and the ball return plate 603 facilitates the processing and creation of the groove structure 65. Furthermore, to make the groove structure 65 easier to create, the groove structure 65 is located at the junction of one of the end cap plate 602 and the ball return plate 603, that is, at the edge of the end cap plate 602 or the ball return plate 603.

[0118] Preferably, the groove structure 65 is a chamfered structure. Compared to the groove structure 65, the chamfered structure has a smoother contact surface 51 with the ball, and has higher structural strength and is less prone to damage. Specifically, the angle range of the chamfered structure is 10° to 80° (the angle range of the normal chamfer is 0° to 90°).

[0119] In some embodiments, please refer to Figures 16 to 19, the sealing module 30 includes a first sealing unit 31, the mover 20 is connected to the first sealing unit 31 in sealing contact with the stator slide rail 10, the first sealing unit 31 extends to both ends along the sliding direction of the mover 20 and abuts against both ends of the mover 20, and the mover 20, the first sealing unit 31 and the stator slide rail 10 form a sealed space.

[0120] The first sealing unit 31 is disposed on the mover 20 and contacts the stator rail 10, thereby sealing the sliding portion of the mover 20. The first sealing unit 31 also extends toward both ends of the mover 20 in its sliding direction, enabling sealing at more locations. Finally, the first sealing unit 31 abuts both ends of the mover 20, thereby completely sealing the mover 20. Within the sealing range of the first sealing unit 31, lubricating oil cannot escape through the first sealing unit 31. Compared to the prior art, the linear motor disclosed in this application can achieve improved sealing of lubricating oil within the rail 11.

[0121] It should be noted that if the sealing performance is poor and the linear motor is running at high speed, the lubricating oil may splash onto other parts of the linear motor, other equipment, or even the product being manufactured, making cleaning and maintenance difficult. In addition, the purpose of using lubricating oil is to lubricate the mover 20 and the stator slide 10. If the lubricating oil overflows due to poor sealing performance, the mover 20 and the stator slide 10 will not be adequately lubricated, thereby reducing the accuracy of the linear motor and affecting its use.

[0122] Specifically, when sealing is performed through the first sealing unit 31, it is necessary to ensure that the mover 20, the first sealing unit 31 and the stator slide rail 10 are in the enclosed space, and other positions are also sealed. If there is a through hole on the mover 20 in the enclosed space, the lubricating oil will flow out from the through hole, and the sealing effect cannot be achieved. Therefore, it is necessary to form a sealed space with the mover 20, the first sealing unit 31 and the stator slide rail 10.

[0123] The first sealing unit 31 abuts against both ends of the mover 20, effectively sealing the mover 20 to the greatest extent possible. Lubricant spillage is also within the coverage of the first sealing unit 31. Furthermore, lubricant spillage is most likely to occur at the ends of the mover 20. This is because the linear motion of the linear motor causes lubricant to accumulate at both ends of the mover 20, where it overflows when a certain amount accumulates. Therefore, extending the first sealing unit 31 to both ends of the mover 20 is a structural feature designed to accommodate the motion patterns of travel structures such as linear motors.

[0124] It should also be noted that when lubricating a linear motor, only a sufficient amount of lubricating oil is often applied, and the mass of the lubricating oil is often not too much. Therefore, the first sealing unit 31 contacts the two ends of the mover 20 by abutting, which is sufficient to seal the lubricating oil flowing there on the one hand, and on the other hand, it can make assembly simpler.

[0125] In addition, the first sealing unit 31 extends to both ends along the sliding direction, and the ends of the mover 20 can be sealed by other sealing structures. If the first sealing unit 31 needs to have the function of end sealing 415, it is only necessary to bend the first sealing unit 31 along the thickness direction of the stator slide rail 10.

[0126] In the present application, the stator slide 10 has a top surface, a bottom surface and two side surfaces. The side close to the mover 20 is the top surface, the side opposite to the top surface is the bottom surface, the surface parallel to the sliding direction of the mover 20 is the side surface, and the surface perpendicular to the sliding direction of the mover 20 is the cross section. The thickness direction of the stator slide 10 refers to the direction of the vertical line between the top surface and the bottom surface. The two sides of the stator slide 10 refer to the two sides of the vertical line between the top surface and the bottom surface. In addition, the drawings in this application do not limit the type of linear motor. Obviously, other types of linear motors can also be used.

[0127] In some embodiments, referring to FIG. 17 and FIG. 19 , a surface of the stator rail 10 that contacts the first sealing unit 31 is a contact surface 51 , and the first sealing unit 31 is perpendicular to the contact surface 51 .

[0128] It should be noted that the mover 20 and the stator rail 10 are in sealed contact, and if the contact is unstable, some lubricating oil will still leak out. Therefore, ensuring stable contact between the mover 20 and the stator rail 10 is also a key step in achieving good sealing. By arranging the first sealing unit 31 perpendicular to the contact surface 51, the pressure generated by the first sealing unit 31 can be perpendicular to the contact surface 51. On the one hand, this can ensure close contact between the first sealing unit 31 and the stator rail 10. On the other hand, when the mover 20 and / or the stator rail 10 move, the first sealing unit 31 and the stator rail 10 can also maintain close contact without affecting their sealing performance.

[0129] In some embodiments, referring to FIG. 16 to FIG. 19 , the first sealing unit 31 has a warped end 311 bent toward one side thereof, and the first sealing unit 31 contacts the stator rail 10 through the warped end 311 .

[0130] Specifically, the first sealing unit 31 has a warped end 311 that is bent toward one side thereof. By setting the warping angle of the warped end 311, the sealing contact position between the first sealing unit 31 and the stator slide rail 10 can be changed, thereby achieving the purpose of better cooperating with other structures on the linear motor; compared with when the warped end 311 is not set, the setting of the warped end 311 can make the first sealing unit 31 have more elastic space in its arrangement direction, thereby making its sealing effect better during the operation of the linear motor; in addition, a certain amount of lubricating oil can be stored in the bending space of the warped end 311 or the space enclosed by the warped end 311 and the stator slide rail 10, so that the lubricating oil is not easy to overflow, thereby further achieving the purpose of better sealing effect.

[0131] In some specific embodiments, referring to FIG. 16 to FIG. 19 , the warped end 311 is bent toward the outside of the mover 20 in a direction away from the mover 20 .

[0132] It should be noted that the warped end 311 of the first sealing unit 31 can contact the stator rail 10 in different directions. Furthermore, by bending the warped end 311 outward away from the mover 20, it is easier for operators to clean the linear motor, eliminating the formation of a cleaning dead zone at the warped end 311 and the accumulation of dust that would affect the normal operation of the linear motor. In this embodiment, the bending of the warped end 311 away from the mover 20 and toward the outside of the mover 20 can be specifically explained by the direction of the warped end 311 in the figure.

[0133] In some embodiments, referring to FIG. 16 to FIG. 19 , one of the first sealing unit 31 and the mover 20 is provided with a slot 312 , and the other is provided with a positioning protrusion 417313 , and the slot 312 and the positioning protrusion 417313 cooperate with each other.

[0134] Specifically, the first sealing unit 31 is connected to the mover 20 through the mutual cooperation between the positioning protrusion 417313 and the card slot 312. The positioning protrusion 417313 and the card slot 312 have the advantages of simple structure, firm cooperation and easy assembly. The operator can easily disassemble, assemble and replace the first sealing unit 31.

[0135] In some specific embodiments, referring to FIG. 16 to FIG. 19 , the mover 20 has a slot 314 opened along the sliding direction, the first sealing unit 31 is assembled in the slot 314 , and the slot 312 and the positioning protrusion 417313 cooperate with each other in the slot 314 .

[0136] It should be noted that the mover 20 has a groove 314 opened along the sliding direction, and the first sealing unit 31 can be assembled in the groove 314, while the slot 312 and the positioning protrusion 417313 are matched in the groove 314. On the one hand, the fixing effect of the first sealing unit 31 can be better, and on the other hand, the positioning protrusion 417313 and the groove 314 can be avoided in other positions. The coordinated assembly of multiple structures makes the connection and fixation of the first sealing unit 31 more stable.

[0137] Preferably, referring to Figures 17 and 19 , the width of the slot 314 is the same as the thickness of the first sealing unit 31 , thereby achieving a mating connection and further improving the connection stability.

[0138] Preferably, referring to FIG. 17 and FIG. 19 , a certain margin space is left at the bottom of the slot 314 to prevent the first sealing unit 31 from being unable to be installed due to machining errors.

[0139] In some more specific embodiments, please refer to Figures 16 to 19. The positioning protrusion 417313 is a strip-shaped convex strip set along the sliding direction, and the locking groove 312 and the strip-shaped convex strip cooperate with each other.

[0140] Specifically, the positioning protrusion 417313 is a strip-shaped ridge arranged along the sliding direction. Since the latching groove 312 and the strip-shaped ridge match each other, the latching groove 312 is also a strip-shaped latching groove 312. When installing the first sealing unit 31, the operator needs to insert the first sealing unit 31 onto the mover 20 along the sliding direction. Compared to positioning protrusions 417313 such as bumps or nubs, strip-shaped ridges provide a better positioning effect in directions other than the sliding direction.

[0141] In some embodiments, referring to FIG. 16 to FIG. 19 , the first sealing unit 31 includes a first sealing member 315 and a second sealing member 316 . The first sealing member 315 and the second sealing member 316 are respectively disposed on both sides of the stator rail 10 .

[0142] It should be noted that, for some linear motors that do not have an oil receiving groove at the bottom, a first seal 315 and a second seal 316 need to be provided on both sides of the stator rail 10 to serve as top seal and bottom seal, respectively.

[0143] 16 to 19 , the first sealing member 315 and the second sealing member 316 are both sealing strips, which can be made of metal, cloth, felt, or polymer materials. Obviously, in other embodiments, the first sealing unit 31 can also be a sealing strip.

[0144] In some specific embodiments, referring to FIG. 17 and FIG. 19 , the stator rail 10 has a top surface and a side surface adjacent to the top surface, the first sealing member 315 contacts the top surface, and the second sealing member 316 contacts the side surface.

[0145] Specifically, the second seal 316 contacts the side of the stator rail 10, which can, on the one hand, be closer to the position where the mover 20 slides on the stator rail 10, and on the other hand, avoid the problem of increased height caused by contact with the bottom surface and inconvenience in placing the linear motor.

[0146] In some embodiments, referring to Figures 16 to 19, a second sealing unit 32 is provided at the end of the mover 20, the edge of the second sealing unit 32 is in sealing contact with the stator rail 10, and the first sealing unit 31 and one side of the second sealing unit 32 are in abutment.

[0147] It should be noted that a second sealing unit 32 is provided at the end of the mover 20, the edge of which is in sealed contact with the stator rail 10. The edge shape of the second sealing unit 32 can be configured according to the specific shape of the stator rail 10 to achieve the purpose of sealing the stator rail 10 and realize the sealing operation of the end of the mover 20 rail. The first sealing unit 31 abuts on one side of the second sealing unit 32, which also avoids the need for other structures on the mover 20 that abut the first sealing unit 31, thereby achieving structural optimization.

[0148] Specifically, if the first sealing unit 31 includes a first seal 315 and a second seal 316, the first seal 315 and the second seal 316 are respectively disposed on either side of the stator rail 10. In the sealed space formed by the second sealing unit 32, the first seal 315, the second seal 316, the mover 20, and the stator rail 10, lubricating oil can circulate within the sealed space as the linear motor moves, thereby improving the operating accuracy of the linear motor.

[0149] In some embodiments, please refer to Figures 1 to 6, the lubrication module 40 includes an oil box 41, an oil guide component 413 and a lubrication unit 43, the linear motor is connected to the oil box 41 having an oil storage chamber 411, the oil storage chamber 411 is provided with an oil guide component 413, the oil guide component 413 has a buffer surface 4131 and an oil inlet end 4132 extending to the opposite side from the buffer surface 4131, the oil guide component 413 is connected to the lubrication unit 43 for lubricating the linear motor.

[0150] An oil guide component 413 is provided within the oil storage chamber 411. The oil guide component 413 has a buffer surface 4131 and an oil introduction end 4132. The oil introduction end 4132 extends from the buffer surface 4131 to the side opposite the buffer surface 4131. This allows the oil guide component 413 to draw lubricating oil from multiple directions within the oil storage chamber 411. Regardless of how the linear motor is positioned or configured, lubricating oil can be drawn through the oil guide component 413. Furthermore, the oil guide component 413 can store a certain amount of lubricating oil, preventing the lubrication unit 43 from drying out and causing damage. The oil guide component 413 provides a certain amount of buffering before the lubricating oil enters the lubrication unit 43. Compared to the prior art, the linear motor disclosed in this application can achieve the goal of improving lubrication stability.

[0151] Specifically, the buffer surface 4131 can be flat or curved, or it can be formed by connecting two non-parallel strips. The buffer surface 4131 is designed to allow lubricating oil to be absorbed by penetration in two directions. With the addition of the oil introduction end 4132, the oil guide component 413 can also absorb lubricating oil in a third direction. This ensures that, regardless of the position of the oil cartridge 41, the oil guide component 413 can always contact the lubricating oil in the oil reservoir 411 and provide it to the lubrication unit 43 for lubrication of the linear motor.

[0152] Among them, the drainage end extends toward the opposite side of the buffer surface 4131, that is, the extension direction of the drainage end is the side away from the buffer surface 4131. It should be explained that this application does not limit whether the drainage end needs to extend perpendicular to the buffer surface 4131.

[0153] It should be noted that the lubrication unit 43 may be in communication with the buffer surface 4131 or the oil inlet end 4132 .

[0154] In some embodiments, referring to FIG. 2 , the buffer surface 4131 and the oil-introducing end 4132 are in contact with inner walls on both sides of the oil storage chamber 411 , respectively.

[0155] It should be noted that the buffer surface 4131 and the oil inlet end 4132 are in contact with the inner walls on both sides of the oil storage chamber 411 respectively, so that no matter which side of the oil storage chamber 411 the lubricating oil is concentrated on, it can be absorbed by the oil guide component 413, allowing the oil guide component 413 to absorb the lubricating oil in the oil storage chamber 411 to the maximum extent.

[0156] In some embodiments, referring to FIG. 2 , at least two buffer surfaces 4131 are provided, and the plurality of buffer surfaces 4131 are connected via an oil-introducing end 4132 .

[0157] It should be noted that a plurality of buffer surfaces 4131 may be provided to obtain a better ability to absorb lubricating oil. It should also be explained that the oil guide component 413 cannot occupy a large volume in the oil storage chamber 411, which would result in a reduced oil storage capacity of the oil box 41.

[0158] In some embodiments, referring to FIG. 2 , the shape and size of the oil guiding component 413 are the same as those of the oil storage chamber 411 .

[0159] It should be noted that the shape and size of the oil reservoir chamber 411 and the oil guide member 413 are identical. For example, if the oil reservoir chamber 411 is spherical, the oil guide member 413 is also spherical and of the same size. Another example is that if the oil reservoir chamber 411 is hexahedral, the oil guide member 413 is also hexahedral and of the same size. This allows the lubricating oil to be absorbed by the oil guide member 413 regardless of where it is located within the oil reservoir chamber 411, providing a more stable lubrication effect on the linear motor.

[0160] In some embodiments, the oil guiding component 413 is an oil guiding sponge.

[0161] It should be noted that the oil guide component 413 is an oil guide sponge, which is cheap and has strong oil absorption and storage capabilities. In other embodiments, the oil guide component 413 can also be an oil guide felt or other polymer materials.

[0162] In some embodiments, referring to FIG. 1 to FIG. 6 , the oil box 41 is connected to the mover 20 , and the lubrication unit 43 is in contact with the track 11 of the stator slide rail 10 .

[0163] An oil box 41 is provided that slides with the mover 20, and an oil storage chamber 411 for storing lubricating oil is provided on the oil box 41. The oil storage chamber 411 is then connected to the lubricating unit 43, and finally the lubricating unit 43 is brought into contact with the track 11, so that the lubricating unit 43 can slide with the mover 20. During the sliding process of the mover 20, the lubricating unit 43 can directly contact the track 11, thereby completing the lubrication of the entire track 11. At the same time, by controlling the flow rate of the lubricating unit 43, it is possible to release lubricating oil of appropriate quality at every point on the track 11, so that the lubricating oil is released evenly and the lubrication effect is better. Compared with the prior art, the linear motor disclosed in this application can also achieve the purpose of improving the lubrication effect.

[0164] Specifically, the lubrication unit 43 is in direct contact with the track 11. In addition to achieving the purpose of improving the lubrication effect, since the lubrication unit 43 can automatically select the contact position with the track 11 according to the shape of the track 11, the application position of the lubricating oil can be more accurate; at the same time, since the lubrication unit 43 slides simultaneously with the mover 20, after the lubrication unit 43 releases the lubricating oil, the mover 20 can immediately achieve the lubrication effect, so the linear motor disclosed in this application can also achieve the purpose of rapid lubrication.

[0165] Because the oil box 41 has its own oil storage chamber 411, it does not need to be connected to an external oil storage device to receive lubricating oil from the outside, making the linear motor adaptable to various usage scenarios. It should be explained that the oil box 41 mentioned in this application can be a separate structural component or a part of some structure that constitutes the mover 20. For example, the mover 20 has a protective shell on both sides, and the oil storage chamber 411 can be opened in the protective shell. In this case, the protective shell is the oil box 41 in this application.

[0166] It should be noted that the lubrication unit 43 can be a structure such as cloth, sponge, brush, or drip nozzle. When cloth, sponge, or brush is selected as the lubrication unit 43, it is connected to the oil storage chamber 411, and the lubricating oil can be brushed onto the track 11. When a drip nozzle is selected as the lubrication unit 43, the drip nozzle head can be abutted against the track 11. When the mover 20 slides, the drip nozzle head releases lubricating oil. When the mover 20 does not slide, the drip nozzle head is under pressure and does not release lubricating oil. In other embodiments, an electronically controlled lubrication unit 43 can also be used to lubricate the track 11. During lubrication, the lubrication unit 43 is driven to connect with the oil storage chamber 411 and release lubricating oil to lubricate the track 11.

[0167] Furthermore, this application does not limit the locations of the oil box 41 and the lubrication unit 43 on the mover 20. The oil box 41 and the lubrication unit 43 can be installed in the same location (for ease of installation and removal) or in different locations. The oil box 41 and the lubrication unit 43 can be installed in the length direction of the mover 20, in the width direction of the mover 20, or above or below the top of the mover 20.

[0168] In some embodiments, referring to FIG. 1 and FIG. 3 , the stator rail 10 and the mover 20 are in sliding contact via a sliding surface 12 , and the lubrication unit 43 is in contact with the sliding surface 12 .

[0169] It should be noted that the lubrication unit 43 is in direct contact with the sliding surface 12 , which makes lubrication simpler and more efficient, and can ensure that every position on the sliding surface 12 can be lubricated in place, resulting in a better lubrication effect.

[0170] In other embodiments, the lubrication unit 43 may also be in contact with the upper portion of the sliding surface 12 , so that the lubricating oil flows onto the sliding surface 12 under the action of gravity, thereby completing the lubrication of the rail 11 .

[0171] In some embodiments, referring to FIG. 3 to FIG. 6 , the lubricating unit 43 is an oiled cloth, a first end 431 of the oiled cloth is in communication with the oil guide component 413 , and a second end 432 of the oiled cloth is in contact with the track 11 .

[0172] It should be noted that lubricating unit 43 is an oil-coated fabric. The lubricating oil in oil reservoir 411 soaks into the fabric and, when in contact with rail 11, is applied to rail 11, thereby achieving lubrication. The use of oil-coated fabric is lightweight, resulting in minimal weight increase when mounted on mover 20. It is also relatively low-cost, contributing to cost reduction. Furthermore, the oil-coated fabric utilizes the permeability of lubricating oil, eliminating the need for additional mechanical components for lubrication and coating, simplifying the overall structure.

[0173] Specifically, the oil-coating cloth has a first end 431 and a second end 432. The first end 431 is used to absorb the lubricating oil in the oil storage chamber 411, and the second end 432 is used to apply the lubricating oil. The operator can control the size ratio of the first end 431 and the second end 432, and cooperate with other installation structures (such as the oil-coating chamber 412 below) to control the oil flow rate of the lubricating oil, thereby meeting different usage scenarios.

[0174] Among them, the oiled fabric can be selected from silk, cotton fabric, Oxford cloth, linen, blended fabrics, flannel or felt and other types of fabrics.

[0175] In some specific embodiments, the oiled cloth is oiled felt.

[0176] Specifically, the oiled fabric is oiled felt, which has good elasticity, structural stability, thermal insulation and wear resistance. During the lubrication process, the heat generated by the friction between the rail 11 will not affect the oiled felt. At the same time, due to its tight structure and high stability, it has a long service life. More importantly, the fibers on the oiled felt are not easy to fall off, so there will be no fiber residue on the rail 11, which will affect the sliding accuracy of the mover 20 and will not affect the stroke accuracy of the mover 20.

[0177] In some specific embodiments, please refer to Figures 3 to 6. The oil box 41 has an oiling chamber 412, which is connected to the oil storage chamber 411. The cross-sectional size of at least one part of the oiling chamber 412 is the same as the cross-sectional size of the oiling cloth, and the oiling cloth is assembled in the oiling chamber 412 at the place where the cross-sectional size is the same.

[0178] Specifically, the cross-sectional dimensions of at least one portion of the oiling chamber 412 are identical to those of the oiling cloth. The oiling cloth is mounted within the oiling chamber 412 at that location, preventing the lubricating oil from leaking out of other locations. Furthermore, the provision of the oiling chamber 412 not only stabilizes the oiling cloth but also makes the mover 20 more compact and smaller.

[0179] It should be noted that the present application does not limit the position of the oil-coated cloth relative to the oil storage chamber 411. In other embodiments, the oil-coated cloth can be arranged above the oil storage chamber 411. In this case, the lubricating oil in the oil storage chamber 411 can also penetrate upward along the oil-coated cloth.

[0180] In some more specific embodiments, referring to FIG. 3 to FIG. 6 , the shapes and sizes of the oiling chamber 412 and the oiling cloth match each other, and the first end 431 is smaller than the second end 432 .

[0181] Specifically, the shape and size of the oiling chamber 412 and the oiling cloth match each other, ensuring that the oiling cloth remains stable within the chamber 412, preventing movement, deformation, or compression. Furthermore, the first end 431 of the oiling cloth is smaller than the second end 432, allowing lubricant that penetrates through the first end 431 to be more dispersed at the second end 432. This reduces the amount of lubricant applied to the rail 11 and effectively controls the oil flow rate.

[0182] In some more specific embodiments, referring to FIG. 3 to FIG. 6 , the oil storage chamber 411 and the oiling cloth are arranged in a vertical direction, and the oil storage chamber 411 is located above the oiling cloth.

[0183] It should be noted that the oil storage chamber 411 is located above the oiled cloth, so that a certain pressure is formed at the first end 431 of the oiled cloth, making it easier for the lubricating oil to penetrate into the oiled cloth, thereby achieving the purpose of stable oil discharge at the second end 432.

[0184] In some embodiments, the oil storage chamber 411 , the oil coating chamber 412 and the oil guide component 413 are sealed by an oil baffle 416 . The oil box 41 includes the oil baffle 416 .

[0185] In some specific embodiments, one of the oil box 41 and the oil baffle 416 has a protruding structure, and the other has a recessed structure, and the protruding structure and the recessed structure cooperate with each other to achieve positioning between the oil box 41 and the oil baffle 416. Preferably, the protruding structure is at least two positioning pins.

[0186] In some embodiments, one of the oil box 41 and the linear motor has a protruding structure, and the other has a recessed structure, and the protruding structure and the recessed structure cooperate with each other to achieve positioning between the oil box 41 and the linear motor. Preferably, the protruding structure is at least two positioning pins.

[0187] In some embodiments, the oil box 41 includes a sealing strip, separate from the other sealing structures on the linear motor. When connected to the linear motor, the sealing strip and other structures provide a sealed connection. The sealing strip is press-fitted between the oil box 41 and the linear motor. This independent sealing strip facilitates assembly and disassembly of the oil box 41 and facilitates its adaptation. In other embodiments, the oil box 41 can also be sealed using other sealing structures on the linear motor.

[0188] In some embodiments, an end seal 415 is connected to the outer side of the oil baffle 416 . The shape of the end seal 415 near the track 11 matches the shape of the track 11 , preventing external dust from entering while protecting the lubrication unit 43 .

[0189] In some embodiments, the outer side of the oil baffle 416 has a positioning protrusion 417313, which is connected to the end seal 415. This allows the end seal 415 to be positioned and its connection to be more secure.

[0190] In some specific embodiments, referring to FIG. 3 to FIG. 6 , the oil box 41 is provided with a blocking portion 414 . The blocking portion 414 is located at the second end 432 and partially blocked between the track 11 and the second end 432 .

[0191] It should be noted that the oil box 41 is provided with a blocking portion 414. On the one hand, the blocking portion 414 can limit the contact position between the oil guide component 413 and the track 11, and shield and protect some places where lubricating oil is not required; on the other hand, the setting of the blocking portion 414 can also limit the oil flow rate and further control the oil output of the lubricating oil.

[0192] In some embodiments, referring to FIG. 1 to FIG. 6 , the oil box 41 is connected to the end of the mover 20 along the sliding direction of the mover 20 .

[0193] Specifically, along the sliding direction of the mover 20, the oil box 41 is connected to the end of the mover 20. By connecting the oil box 41 to the end of the mover 20, the oil box 41 can be easily refueled, repaired and replaced. In addition, since the oil box 41 is set at the end of the mover 20, the lubrication unit 43 slides at the lubrication point immediately after lubrication, thereby making the lubrication effect better.

[0194] Preferably, two oil storage chambers 411 are provided along the sliding direction of the mover 20 , which are located at both ends of the mover 20 , so that no matter which direction the mover 20 slides, it can be lubricated by the lubrication unit 43 in advance.

[0195] Preferably, the oil box 41 is arched, with an arched hole. The shape of the arched hole matches the shape and size of the mover 20 where the oil box 41 is mounted. Furthermore, oil storage chambers 411 are provided at each end of the oil box 41, enhancing its aesthetics and providing a more compact connection to the mover 20. The arched structure further enhances the provision of oil storage chambers 411 at each end of the mover 20, making the opening of the oil storage chambers 411 more convenient, facilitating installation of the oil box 41, and protecting the mover 20.

[0196] In this specification, the use of terms such as "Embodiment 1," "this embodiment," and "in one embodiment" indicates that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in the invention or at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example; furthermore, the specific features, structures, materials, or characteristics described may be appropriately combined in any one or more embodiments or examples.

[0197] In the description of this specification, the terms "connect," "install," "fix," "dispose," and "have" are to be understood in a broad sense. For example, "connect" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0198] In the description of this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising the element.

[0199] The above description of the embodiments is to facilitate ordinary technicians in this technical field to understand and apply the technology of this case. People familiar with the technology in this field can obviously make various modifications to these examples easily and apply the general principles described here to other embodiments without having to go through creative work. Therefore, this case is not limited to the above embodiments. Modifications to the following situations should all be within the scope of protection of this case: ① A new technical solution implemented based on the technical solution of the present invention and combined with existing common knowledge, the technical effect produced by the new technical solution does not exceed the technical effect of the present invention; ② The equivalent replacement of some features of the technical solution of the present invention with the known technology, the technical effect produced is the same as the technical effect of the present invention; ③ The technical solution of the present invention is expandable, and the substantive content of the expanded technical solution does not exceed the technical solution of the present invention; ④ The equivalent transformation made by the content of the description and drawings of the present invention is directly or indirectly applied to other related technical fields.

Claims

1. A linear motor comprising a stator rail and a mover slidingly engaged with the stator rail, characterized in that: Also includes: a sealing module, which is arranged on the mover and slides and seals with the stator slide rail, wherein the mover, the stator slide rail and the sealing module together form a sealed space; Ball return end caps, both ends of the mover are provided with the ball return end caps, each of the ball return end caps is provided with a ball return channel, and the ball return channel and the first slideway together form a circulation loop for the ball movement; a lubrication module, disposed on the linear motor and connected to the sealed space; The ball retaining plate includes a positioning surface that cooperates with the mover, and contact surfaces of the limiting balls are provided on both the upper and lower sides of the positioning surface.

2. A linear motor according to claim 1, characterized in that: The positioning surface has a strip-shaped recess and / or a strip-shaped protrusion arranged along the sliding direction of the mover, and the mover is provided with a matching portion, and the matching portion is plug-fitted with the strip-shaped recess and / or the strip-shaped protrusion of the positioning surface.

3. A linear motor according to claim 1, characterized in that: The mover and the ball retaining plate together form the first slideway with a contact notch, the contact notch is opened along the sliding direction of the mover, the balls are constrained in the first slideway, and each of the balls partially passes through the contact notch and contacts the stator slide rail.

4. A linear motor according to claim 3, characterized in that: The ball retaining plate is symmetrical up and down, and the contact notch is symmetrical along the symmetry plane of the ball retaining plate.

5. A linear motor according to claim 4, characterized in that: The contact notch located on the upper side of the positioning surface has an opening direction facing obliquely upward; the contact notch located on the lower side of the positioning surface has an opening direction facing obliquely downward.

6. A linear motor according to claim 3, characterized in that: The upper half or the lower half of the ball bearing is close to the stator slide rail and contacts the stator slide rail.

7. A linear motor according to any one of claims 1 to 6, characterized in that: The ball return channel has a first return port and a second return port. The ball return end cover is provided with an oil channel communicating with the outside. The oil channel is communicated with the ball return channel.

8. A linear motor according to any one of claims 1 to 6, characterized in that: The ball-returning channel is provided with a groove structure which is recessed inward away from the ball-returning channel, and the groove structure is arranged along the ball-returning path direction of the ball-returning channel.

9. A linear motor according to any one of claims 1 to 6, characterized in that: The sealing module includes a first sealing unit. The mover is connected to the first sealing unit which is in sealing contact with the stator slide rail. The first sealing unit extends to both ends along the sliding direction of the mover and abuts against both ends of the mover. The mover, the first sealing unit and the stator slide rail form a sealed space.

10. A linear motor according to any one of claims 1 to 6, characterized in that: The lubrication module includes an oil box, an oil guide component and a lubrication unit. The linear motor is connected to the oil box having an oil storage chamber. The oil guide component is provided in the oil storage chamber. The oil guide component has a buffer surface and an oil guide end extending to the opposite side of the buffer surface. The oil guide component is connected to the lubrication unit for lubricating the linear motor.

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