Linear actuator

Abstract

The utility model discloses a linear actuator, including casing, magnetic yoke, drive assembly, connecting component and output shaft, connecting component is movably installed in casing, and drive assembly and output shaft are installed respectively in both ends of connecting component, and connecting component can be driven by drive assembly and moves along the linear reciprocation, thereby drive output shaft and move along the linear reciprocation, wherein, the casing includes frame and side plate, and magnetic yoke and side plate are arranged side by side, and frame has two frames of separate arrangement, and side plate and magnetic yoke are connected to two frames respectively. The structure setting of this kind of magnetic yoke is exposed to casing, reduces the space in the thickness direction of the thickness occupied by magnetic yoke, thereby reduces the overall thickness of linear actuator, makes the overall volume of linear actuator smaller.

Description

Technical Field

[0001] This utility model relates to the field of drive equipment, and in particular to a linear actuator. Background Technology

[0002] Linear actuators are power-driven devices widely used in automated manufacturing processes such as semiconductor chip processing, electronic equipment manufacturing, and machining. In existing linear actuators, the base plate and frame of the housing are generally integrated, with the magnetic yoke installed inside the housing. This results in both high overall cost and a relatively large thickness of the actuator. Utility Model Content

[0003] The technical solution of this utility model is as follows: a linear actuator is provided, which includes a housing, a magnetic yoke, a drive assembly, a connecting assembly, and an output shaft; the connecting assembly is movably installed in the housing, the drive assembly and the connecting assembly are connected, the output shaft is installed on the connecting assembly, the connecting assembly can be driven by the drive assembly to reciprocate along a straight line, and the output shaft reciprocates along a straight line under the drive of the connecting assembly; wherein, the housing includes a frame and side plates, the magnetic yoke and the side plates are arranged side by side, the frame has two spaced-apart borders, and the side plates and the magnetic yoke are respectively connected to the two borders.

[0004] Preferably, the housing includes two side plates, which are connected opposite to each other to the two sides of the frame, and the length of the side plates is the same as the length of the frame; the linear actuator includes two magnetic yokes, which are connected opposite to each other to the two sides of the frame; the frame and the two magnetic yokes together form an installation space, which includes a first space and a second space arranged sequentially along the moving direction of the connecting assembly, the driving assembly is disposed in the first space, and the second space is used to accommodate the circuit structure.

[0005] Preferably, the linear actuator further includes a support member disposed within the mounting space and connecting the two magnetic yokes, thereby preventing deformation of the longer magnetic yokes.

[0006] Preferably, the length direction of the support member intersects with the length direction of the magnetic yoke, and the support member divides the installation space into the first space and the second space.

[0007] Preferably, the thickness of the magnetic yoke is greater than the thickness of the side plate, and a first groove is recessed inward on the frame. The magnetic yoke is housed in the first groove so that the outer surface of the magnetic yoke and the outer surface of the side plate are on the same plane, thereby ensuring that the magnetic yoke fulfills its function and that the overall thickness of the linear actuator is relatively thin.

[0008] Preferably, the frame includes two first side frames and two second side frames, the two first side frames are arranged in parallel, the two second side frames are arranged in parallel and respectively connected to the two ends of the two first side frames, and the first side frames and the second side frames are connected by fasteners, thereby facilitating the assembly of the linear actuator and reducing production costs.

[0009] Preferably, a matching locking block and a locking slot are provided between the first frame and the second frame, with the locking block engaging within the locking slot. The first and second frames are first positioned using the engaging of the locking block and the locking slot, and then secured with fasteners, making frame assembly more convenient.

[0010] Preferably, the linear actuator further includes an air passage adapter, and a clearance hole is provided through one side wall of the frame. The air passage adapter passes through the clearance hole and is connected to the connecting assembly. The air passage adapter is directly connected to the interior of the output shaft, or the air passage adapter is connected to the interior of the output shaft through the connecting assembly.

[0011] Preferably, a second recess for installing cables is provided inward on one side wall of the frame. A pressure plate is detachably connected to the second recess, which is used to press the cables into the second recess to make the cable connection secure.

[0012] Preferably, the frame is equipped with a collision avoidance member for limiting the position of the connecting components, the collision avoidance member being an elastic structure.

[0013] Preferably, the linear actuator further includes a guide assembly comprising a slidingly engaged slider and a guide rail. One of the slider and the guide rail is fixed to an inner sidewall of the frame, and the other of the slider and the guide rail is fixed to the side of the connecting assembly. Compared to the prior art method of mounting the guide assembly between the side plate and the connecting block, this application places the guide assembly on the side of the connecting assembly, thereby helping to reduce the overall thickness of the linear actuator.

[0014] Preferably, the linear actuator further includes an air nozzle, which is installed in the frame and communicates with the interior of the housing, for sucking or blowing air into the housing to achieve heat dissipation and internal dust removal.

[0015] Preferably, the frame has air holes that connect to the interior of the housing for air intake or exhaust.

[0016] Compared with the prior art, the linear actuator of this utility model has a housing consisting of a detachably connected frame and side plates, with the width of the side plates being smaller than the width of the frame. The magnetic yoke and side plates are arranged side by side and connected to the frame respectively. The magnetic yoke and the side plates together form at least one side of the housing. That is, the length of the magnetic yoke and the side plates is the same as the overall length of the frame. The magnetic yoke and the side plates together form the side of the housing. This structural setting, in which the magnetic yoke is directly used as part of the side of the housing, reduces the space occupied by the magnetic yoke in the thickness direction, thereby reducing the overall thickness of the linear actuator and making the overall volume of the linear actuator smaller. Furthermore, setting the frame and side plates of the housing as a detachably connected structure makes the assembly of the housing and the entire linear actuator more convenient and reduces the production cost of the linear actuator. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the linear actuator of this utility model.

[0018] Figure 2 yes Figure 1 A structural diagram from another angle.

[0019] Figure 3 yes Figure 1 The exploded diagram.

[0020] Figure 4 yes Figure 2 The exploded diagram.

[0021] Figure 5 yes Figure 3 A schematic diagram of the internal structure.

[0022] Figure 6 yes Figure 5 A breakdown diagram of the mid-framework.

[0023] Figure 7 yes Figure 1 A sectional view. Detailed Implementation

[0024] Embodiments of the present invention will now be described with reference to the accompanying drawings, in which similar element reference numerals represent similar elements. It should be noted that the directional descriptions involved in the present invention, such as up, down, left, right, front, and back, indicating directions or positional relationships, are based on the directions or positional relationships shown in the drawings and are only for the convenience of describing the technical solutions of this application or / and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "first," "second," etc., described are only used to distinguish technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0025] First combine Figures 1-7 As shown, in one embodiment of this utility model, the provided linear actuator 100 includes a housing 110, a magnetic yoke 120, a drive assembly 130, a connecting assembly 140, and an output shaft 150. The drive assembly 130 is mounted on the magnetic yoke 120. The connecting assembly 140 is movably mounted within the housing 110 and connected to the drive assembly 130, and the connecting assembly 140 can be driven by the drive assembly 130 to reciprocate linearly. The output shaft 150 is mounted on the connecting assembly 140, and one end of the output shaft 150 away from the connecting assembly 140 extends outside the housing 110, and the output shaft 150 can reciprocate linearly under the drive of the connecting assembly 140. In this embodiment, the housing 110 includes a frame 111 and a side plate 112. In a direction perpendicular to the direction of movement of the connecting assembly 140, the side plate 112 and the magnetic yoke 120 are arranged side by side. Meanwhile, in the moving direction of the connecting assembly 140, both ends of the side plate 112 and the magnetic yoke 120 are respectively connected to the two spaced-apart side frames of the frame 111. The magnetic yoke 120 and the side plate 112 together constitute at least one side of the linear actuator 100, thereby reducing the space occupied by the magnetic yoke 120 in the thickness direction, and thus reducing the overall thickness of the linear actuator 100.

[0026] Preferably, the drive assembly 130 is a linear motor, with the stator of the linear motor mounted on the yoke 120 and the mover of the linear motor connected to one side of the connecting assembly 140. The mover of the linear motor moves under the drive of its stator, and drives the connecting assembly 140 to reciprocate in a straight line. Understandably, the drive assembly 130 may use other drive components.

[0027] The following is combined Figures 1-4 As shown, in one embodiment of this utility model, the housing 110 includes two side plates 112. The length of each side plate 112 is the same as the length of the frame 111, and the width of each side plate 112 is less than the width of the frame 111. The two side plates 112 are respectively disposed on the two sides of the frame 111 and are opposite to each other. One side of the side plate 112 in the width direction is flush with one side of the frame 111 in the width direction. At the same time, both ends of the side plates 112 in the length direction are flush with both ends of the frame 111 in the length direction. Figure 1-2 As shown. Two magnetic yokes 120 are respectively disposed on two sides of the frame 111 and are opposite to each other. The length of the magnetic yokes 120 is the same as the length of the frame 111, so that the two ends of the two magnetic yokes 120 in the length direction are flush with the two ends of the frame 111 in the length direction. At the same time, the side of the two magnetic yokes 120 away from the side plate 112 is flush with the other side of the frame 111 in the width direction. Figure 1-2As shown, the linear actuator 100 is thus constructed by arranging the magnetic yoke 120 and the side plate 112 side by side on both opposite sides, thereby reducing the overall thickness of the linear actuator 100.

[0028] The following is combined Figure 3-5 As shown, a mounting space is formed by the frame 111 and the two magnetic yokes 120. This mounting space includes a first space 113 and a second space 114 arranged sequentially along the moving direction of the connecting assembly 140. The driving assembly 130 is disposed in the first space 113, and the second space 114 is used to accommodate the circuit structure, as detailed later.

[0029] Combination Figure 3 , Figure 5 As shown, in one embodiment of this utility model, the linear actuator 100 further includes a support member 160. The support member 160 is disposed within the aforementioned installation space and connects two magnetic yokes 120, thereby preventing deformation of the longer magnetic yokes 120. More specifically, the length direction of the support member 160 is staggered with the length direction of the magnetic yokes 120, and the support member 160 divides the aforementioned installation space into a first space 113 and a second space 114. The second space 114 is used to accommodate circuit structures, etc., making the internal structure of the linear actuator 100 compact and helping to reduce the overall volume of the linear actuator 100.

[0030] Continue to combine Figure 3-5 As shown, in a preferred embodiment of this utility model, the thickness of the magnetic yoke 120 is greater than the thickness of the side plate 112. Therefore, an inwardly recessed first groove 1111 is provided on the frame 111, specifically, the first groove 1111 is recessed on both sides of the frame 111 along its length. When the magnetic yoke 120 is installed, the magnetic yoke 120 is accommodated within the first groove 1111, so that the outer surface of the magnetic yoke 120 and the outer surface of the side plate 112 are on the same plane. Figure 1-2 As shown. This ensures that the yoke 120 fulfills its function and further reduces the overall thickness of the linear actuator 100.

[0031] The following is combined Figures 1-6 As shown, in one embodiment of this utility model, the frame 111 includes two first side frames 111a and two second side frames 111b. The two first side frames 111a are arranged in parallel, and the two second side frames 111b are arranged in parallel and respectively connected to the two ends of the two first side frames 111a. The first side frames 111a and the second side frames 111b are connected by fasteners 111c. The split structure of the frame 111 facilitates the assembly of the linear actuator 100 and reduces production costs. Specifically, as shown... Figure 1-6As shown, in some embodiments, the two ends of each magnetic yoke 120 are fixedly connected to two second frame borders 111b respectively, and the two ends of each side plate 112 are fixedly connected to two second frame borders 111b respectively. At the same time, each magnetic yoke 120 overlaps with a first frame border 111a, and each side plate 112 overlaps with another first frame border 111a, so that the two magnetic yokes 120, the two side plates 112, the two first frame borders 111a, and the two second frame borders 111b together form a closed space, which protects the drive assembly 130, the connection assembly 140, and the output shaft 150 disposed therein, but is not limited thereto.

[0032] See Figure 6 As shown, a locking block 1113 and a locking groove 1114 are provided between the first frame 111a and the second frame 111b, with the locking block 1113 engaging within the locking groove 1114. The locking block 1113 and the locking groove 1114 are first used to position the first frame 111a and the second frame 111b, and then fixed by fasteners 111c (e.g., bolts), making the assembly of the frame 111 easier. In one specific embodiment, locking grooves 1114 are respectively provided at both ends of the first frame 111a, and the locking grooves 1114 penetrate the end face of the first frame 111a. Locking blocks 1113 protrude from both ends of the second frame 111b. During installation, the second frame 111b can slide from the outside to engage the locking blocks 1113 at both ends into the locking grooves 1114 at the ends of the first frame 111a, making the assembly of the first frame 111a and the second frame 111b more convenient. Understandably, the positions of the card block 1113 and the card slot 1114 can also be interchanged.

[0033] Continue reading Figure 6 As shown, in this embodiment, corresponding first grooves 1111 are formed on the two second frame sides 111b. The magnetic yoke 120 is housed in the first grooves 1111 on the two second frame sides 111b, and the two ends of the magnetic yoke 120 in the length direction are connected to the two second frame sides 111b. In addition, a second groove 1112 is also formed on one of the second frame sides 111b. The second groove 1112 is used for installing and connecting external cables, as detailed later. A clearance hole 1115 is also formed through one of the first frame sides 111a. The clearance hole 1115 is used for installing and connecting the air passage adapter 115 connected to the assembly 140, as detailed later.

[0034] The following is combined Figures 4-5As shown, in one embodiment of the present invention, the linear actuator 100 further includes a guide component 170, which is connected between the side of the connecting component 140 and an inner sidewall of the frame 111. Compared with the prior art where the guide component 170 is installed between the side plate 112 and the connecting block, the present application places the guide component 170 on the side of the connecting component 140, thereby further reducing the overall thickness of the linear actuator 100.

[0035] Specifically, the guide assembly 170 includes a slidingly engaged guide rail 171 and a slider 172. One of the slider 172 and the guide rail 171 is fixed to an inner sidewall of the frame 111, and the other of the slider 172 and the guide rail 171 is fixed to a side of the connecting assembly 140. In one embodiment, the guide rail 171 is fixed to the side of the connecting assembly 140 away from the drive assembly 130, and the guide rail 171 extends along the moving direction of the connecting assembly 140. At least one slider 172 is fixed to the inner sidewall of the frame 111, specifically to the inner sidewall of a first frame 111a. When the connecting assembly 140 moves, it drives the guide rail 171 to move synchronously, and the guide rail 171 slides along the slider 172, thereby guiding the connecting assembly 140. In this application, the guide component 170 is disposed on the side of the connecting component 140, which not only guides the connecting component 140, but also reduces the space occupied by the guide component 170 and the connecting component 140 in the thickness direction, thereby reducing the overall thickness of the linear actuator 100.

[0036] Recombined Figures 3-5 As shown, in one embodiment of this utility model, the linear actuator 100 further includes a circuit board 180. The circuit board 180 is mounted within the aforementioned second space 114 and is arranged parallel to the magnetic yoke 120, thereby occupying less space in the length and thickness directions. The circuit board 180 is electrically connected to the drive assembly 130 and external components. The arrangement of the circuit board 180 in this embodiment is beneficial for a compact structure and reducing the overall thickness and width.

[0037] Combination Figure 2 , Figure 4 As shown, in this embodiment, a second groove 1112 for installing cables is recessed inward on the side wall of the frame 111 corresponding to the circuit board 180. The second groove 1112 is specifically recessed on the second frame 111b. A wire pressing plate 111d is also detachably connected to the second groove 1112. The wire pressing plate 111d is used to press the cable into the second groove 1112 to make the cable connection secure.

[0038] The following is combined Figure 1-5 , Figure 7As shown, in one embodiment of this utility model, the linear actuator 100 further includes a pneumatic adapter 115. The pneumatic adapter 115 is installed in a clearance hole 1115 on the frame 111, connected to the connecting assembly 140, with one end of the pneumatic adapter 115 directly communicating with the interior of the output shaft 150, and the other end of the pneumatic adapter 115 protruding from the housing 110. Figure 7 As shown.

[0039] Understandably, the connection method between the air path adapter 115 and the output shaft 150 is not limited to that in this embodiment. For example, in other embodiments, an air path channel may be provided in the connecting assembly 140, so that the air path adapter 115 can be connected to the interior of the output shaft 150 through the air path channel in the connecting assembly 140, which does not affect the realization of its function.

[0040] Recombined Figure 1-5 , Figure 7 As shown, the linear actuator 100 also includes an air nozzle 116, which is mounted on the frame 111 and communicates with the interior of the housing 110. The air nozzle 116 is used to draw in or blow air into the housing 110 to achieve heat dissipation and internal dust removal. In one specific embodiment, two air holes 111e are provided through the second frame 111b adjacent to the aforementioned second space 114. The two air holes 111e are spaced apart and each communicates with the interior of the housing 110. One air hole 111e houses the air nozzle 116, and the other air hole 111e is used to discharge or draw gas into the housing 110. The arrangement of the air holes 111e and the air nozzle 116 is conventional in the art and will not be described in detail further.

[0041] See below. Figure 5 As shown, in one embodiment of this utility model, the frame 111 is further provided with a collision avoidance member 117. The collision avoidance member 117 has an elastic structure and is used to limit the connection assembly 140. In this embodiment, the collision avoidance member 117 is installed at the end of the frame 111 where the output shaft 150 is installed. The collision avoidance member 117 has a columnar structure, is embedded in the inner sidewall of the frame 111 and protrudes from the inner sidewall of the frame 111, specifically embedded in the inner sidewall of the second frame 111b. The collision avoidance member 117 can abut against the end of the connection assembly 140 where the output shaft 150 is installed, thereby limiting the connection assembly 140. Of course, it is also feasible to also provide a collision avoidance member 117 between the end of the connection assembly 140 away from the output shaft 150 and the frame 111 or other components.

[0042] Recombined Figures 1-7As shown, in use, the linear actuator 100 of this invention drives the connecting assembly 140 to reciprocate along a straight line by the drive assembly 130, thereby causing the output shaft 150 to reciprocate along a straight line. During the movement of the connecting assembly 140, the guide rail 171 of the guide assembly 170 moves synchronously, and the guide rail 171 slides along the slider 172 to guide the connecting assembly 140.

[0043] In summary, the linear actuator 100 of this utility model has a housing 110 comprising a detachably connected frame 111 and a side plate 112. The frame 111 has two spaced-apart side frames 111b, and the width of the side plate 112 is less than the width of the frame 111. The magnetic yoke 120 and the side plate 112 are arranged side by side and connected to the two side frames 111b respectively. The magnetic yoke 120 and the side plate 112 together constitute at least one side of the housing 110. That is, the length of the magnetic yoke 120 and the side plate 112 is the same as the overall length of the frame 111, and the side of the housing 110 is formed by the magnetic yoke 120 and the side plate 112. This structural design, in which the magnetic yoke 120 is directly incorporated as part of the side of the housing 110, reduces the space occupied by the magnetic yoke 120 in the thickness direction, thereby reducing the overall thickness of the linear actuator 100 and making the overall volume of the linear actuator 100 smaller. Furthermore, by setting the frame 111 and side plate 112 of the housing 110 as a detachable connection structure, the assembly of the housing 110 and the entire linear actuator 100 becomes more convenient, and the production cost of the linear actuator 100 can be reduced.

[0044] The structures of the other parts of the linear actuator 100 involved in this application are conventional structures well known to those skilled in the art, and will not be described in detail.

[0045] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the scope of the present utility model application shall still fall within the scope of the present utility model.

Claims

1. A linear actuator, characterized in that, The linear actuator includes a housing, a magnetic yoke, a drive assembly, a connecting assembly, and an output shaft; the connecting assembly is movably installed inside the housing, the drive assembly and the connecting assembly are connected, the output shaft is installed on the connecting assembly, the connecting assembly can be driven by the drive assembly to reciprocate along a straight line, and the output shaft reciprocates along a straight line under the drive of the connecting assembly; The housing includes a frame and side plates. The magnetic yoke and the side plates are arranged side by side. The frame has two separate side frames. The side plates and the magnetic yoke are respectively connected to the two side frames.

2. The linear actuator as described in claim 1, characterized in that, The housing includes two side plates, which are respectively disposed on both sides of the frame; the linear actuator includes two magnetic yokes, which are respectively disposed on both sides of the frame; The frame and the two magnetic yokes together form an installation space, which includes a first space and a second space arranged sequentially along the moving direction of the connecting component, and the driving component is disposed in the first space.

3. The linear actuator as described in claim 2, characterized in that, The linear actuator also includes a support member disposed within the mounting space and connected to the two magnetic yokes.

4. The linear actuator as described in claim 1, characterized in that, The frame is recessed inward with a first groove, and the magnetic yoke is housed in the first groove.

5. The linear actuator as described in claim 1, characterized in that, The frame includes two first side frames and two second side frames. The two first side frames are arranged in parallel, and the two second side frames are arranged in parallel and respectively connected to the two ends of the two first side frames. The first side frames and the second side frames are connected by fasteners.

6. The linear actuator as described in claim 5, characterized in that, A matching locking block and a locking slot are provided between the first frame and the second frame, and the locking block is engaged in the locking slot.

7. The linear actuator as claimed in claim 1, characterized in that, The linear actuator also includes an air circuit adapter. A clearance hole is provided through one side wall of the frame. The air circuit adapter passes through the clearance hole and is connected to the connecting assembly. The air circuit adapter is directly connected to the interior of the output shaft, or the air circuit adapter is connected to the interior of the output shaft through the connecting assembly.

8. The linear actuator as claimed in claim 1, characterized in that, A second recessed groove for installing cables is also provided on one side wall of the frame. A pressure plate is connected to the second groove, and the pressure plate is used to press the cables into the second groove; and / or, The frame is equipped with a collision-resistant member for limiting the position of the connecting components. The collision-resistant member is an elastic structure.

9. The linear actuator as claimed in claim 1, characterized in that, The linear actuator further includes a guide assembly comprising a slidingly engaged slider and a guide rail, one of which is fixed to an inner sidewall of the frame, and the other of which is fixed to the side of the connecting assembly.

10. The linear actuator as claimed in claim 1, characterized in that, The linear actuator further includes an air nozzle, which is mounted on the frame and communicates with the interior of the housing, for suction or blowing air into the housing; and / or, The frame has air holes that connect to the interior of the housing for air intake or exhaust.

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