Linear actuator

Abstract

The utility model discloses a linear actuator, including casing, drive assembly, connecting piece, output shaft, magnetic force spring and guide rail subassembly, drive assembly, connecting piece are installed in casing respectively and are connected, and output shaft is installed in connecting piece, and drive assembly drives output shaft and moves along the straight line through connecting piece, wherein, connecting piece is provided with the mounting hole of through -going, magnetic force spring includes movement module and fixed module, and movement module is located in the mounting hole and is fixedly connected with connecting piece, and fixed module is worn in connecting piece and both ends stretch out connecting piece outside and connect casing, and two guide rail subassembly are arranged in the both sides of movement module respectively, and two guide rail subassembly are all arranged between connecting piece and casing. Thus make the elastic force effect of magnetic force spring more balanced and stable, and then make the force that connecting piece is more balanced in the moving process, and the both sides of movement module are guided through two guide rail subassembly in the moving process, thereby improve the stability of connecting piece movement.

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, a guide assembly (such as the fit between a guide rail and a slider) is typically placed between the side of the connector and the housing, while a spring is placed between one end of the connector and the housing. This existing arrangement of the spring and guide assembly results in uneven force distribution on the connector during movement, leading to less smooth movement of the output shaft. Utility Model Content

[0003] The technical solution of this utility model is as follows: A linear actuator is provided, comprising a housing, a drive assembly, a connector, an output shaft, a magnetic spring, and a guide rail assembly; the drive assembly is installed inside the housing; the connector is movably installed inside the housing and connected to the drive assembly, and the connector can be driven by the drive assembly to move linearly; the output shaft is installed on the connector, and the output shaft can move linearly under the drive of the connector; the magnetic spring is disposed inside the housing, and the magnetic spring includes a motion module and a fixing module, the fixing module is connected to the housing, and the motion module is connected to the connector; two sets of guide rail assemblies are respectively disposed on both sides of the motion module, and both sets of guide rail assemblies are disposed between the connector and the housing; wherein, the connector has a through mounting hole, the motion module is located in the mounting hole and fixedly connected to the connector, and the fixing module passes through the connector and extends out of the connector at both ends.

[0004] Preferably, the linear actuator further includes a mounting member, which is mounted on the housing and located between the housing and the connector, forming an installation space between the mounting member and the connector; the two sets of guide rail assemblies are respectively mounted in the installation space.

[0005] Preferably, the connector includes a columnar mounting portion and connecting portions on both sides of the mounting portion. The mounting portion has mounting holes. One connecting portion is used to connect the drive assembly, and the other connecting portion is used to connect the output shaft. The two sets of guide rail assemblies are respectively mounted on both sides of the mounting portion, thereby making the force on the connector more balanced and improving the stability of the connector's movement.

[0006] Preferably, the connecting portion has opposing first and second sides, and the mounting space is formed between the first side and the mounting member; the mounting portion includes a first mounting portion protruding from the first side and a second mounting portion protruding from the second side, and the height of the first mounting portion from the first side is greater than the height of the second mounting portion from the second side, so that the height of the mounting space is sufficient to mount the guide rail assembly, and at the same time, the overall height of the mounting portion is reduced, the space occupied by the connecting member in the thickness direction is reduced, and the volume of the linear actuator is smaller. Preferably, the first mounting part divides the mounting space into a first space and a second space; the guide rail assembly is a cross roller guide rail, and two sets of cross roller guide rails are respectively installed in the first space and the second space, and each set of cross roller guide rails abuts against the first mounting part, which facilitates the symmetrical installation of the two sets of cross roller guide rails, thereby improving the stability of the movement of the connecting parts.

[0007] Preferably, the mounting component includes a first plate-shaped portion and a second plate-shaped portion and a third plate-shaped portion connected to opposite sides of the first plate-shaped portion, wherein the second plate-shaped portion and the third plate-shaped portion are arranged at an angle to the first plate-shaped portion; the first plate-shaped portion, the second plate-shaped portion, the third plate-shaped portion and the connecting member form the mounting space, and the two sets of cross roller guides respectively abut against the second plate-shaped portion and the third plate-shaped portion, thereby positioning the cross roller guides and making the overall structure more compact.

[0008] Preferably, the motion module includes a sleeve with a cylindrical structure, the sleeve being installed in the mounting hole and fixed to the connector, and the sleeve and the connector having the same length.

[0009] Preferably, the fixing module includes a positioning element, a mounting tube, and at least one magnet. The magnet is installed inside the mounting tube, and the positioning element is inserted into both ends of the mounting tube and abuts against the magnet and the mounting tube respectively. The total length of the magnet is greater than the length of the sleeve.

[0010] Preferably, the guide rail assembly includes a first rail, a second rail, and a rolling element assembly. The first rail and the second rail are installed parallel to each other in the installation space. The rolling element assembly rolls against the first rail and the second rail to move linearly along the first rail and the second rail. The rolling element assembly is also connected to the connector, and the linear movement of the rolling element assembly guides the movement of the connector.

[0011] Preferably, the ends of the first track and the second track are staggered, and the length of the rolling element assembly is less than the length of the overlapping portion of the first track and the second track.

[0012] Preferably, the connector, the mounting component, and the two sets of guide rail assemblies are symmetrically arranged relative to the motion module, thereby making the force on the connector more balanced and improving the stability of the connector's movement.

[0013] Compared with the prior art, the linear actuator of this utility model has a more balanced and stable elastic force generated by the magnetic spring. The elastic force acts on approximately the middle of the connector, making the force on the connector more even during movement. The two sets of guide rail assemblies on both sides of the motion module provide guidance during movement, thereby improving the smoothness of the connector's movement and making the output shaft move more smoothly. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the linear actuator of this utility model.

[0015] Figure 2 yes Figure 1 A schematic diagram of the internal structure.

[0016] Figure 3 yes Figure 2 The exploded diagram.

[0017] Figure 4 yes Figure 3 Exploded view of the center guide rail assembly.

[0018] Figure 5 yes Figure 3 Exploded view of the connecting parts and magnetic spring.

[0019] Figure 6 yes Figure 2 A sectional view. Detailed Implementation

[0020] 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.

[0021] First combine Figures 1-6 As shown, in one embodiment of this utility model, the provided linear actuator 100 includes a drive assembly 110, a connector 120, an output shaft 130, a magnetic spring 140, a guide rail assembly 150, and a housing 170. The drive assembly 110 is installed within the housing 170. The connector 120 is movably installed within the housing 170 and connected to the drive assembly 110. The connector 120 can be driven by the drive assembly 110 to move linearly, and the connector 120 also has a through mounting hole 121 (see...). Figure 2 Mounting holes 121 penetrate both ends of the connector 120 in the direction of movement. Output shaft 130 is mounted on connector 120 and can move linearly under the drive of connector 120. Magnetic spring 140 is disposed within housing 170 and includes a motion module 141 and a fixing module 142 (see...). Figure 3 The motion module 141 is installed in the mounting hole 121 and fixedly connected to the connector 120. The fixing module 142 passes through the connector 120 and extends out of the connector 120 at both ends. The fixing module 142 is connected to the housing 170. Two sets of guide rail assemblies 150 are respectively disposed on both sides of the motion module 141, and both sets of guide rail assemblies 150 are disposed between the connector 120 and the housing 170. During the linear movement of the connector 120, the magnetic spring 140 can generate a more balanced and stable elastic force on the connector 120, while the two sets of guide rail assemblies 150 can provide a smoother guiding effect for the movement of the connector 120.

[0022] The following is combined Figure 1-4 , Figure 6As shown, in one embodiment of this utility model, the linear actuator 100 further includes a mounting member 160. Specifically, the mounting member 160 is mounted on the housing 170 and located between the housing 170 and the connecting member 120, forming a mounting space 160a between the mounting member 160 and the connecting member 120. Two sets of guide rail assemblies 150 are respectively mounted in the mounting space 160a and located on both sides of the motion module 141, and the two sets of guide rail assemblies 150 are respectively connected to the connecting member 120, as shown. Figure 2 As shown. The mounting component 160 facilitates the installation of the two sets of guide rail assemblies 150 and makes the overall structure more compact.

[0023] The following is combined Figure 2-3 , Figure 5 As shown, in one embodiment of this utility model, the connector 120 includes a columnar mounting portion 122 and connecting portions 123 disposed on both sides of the mounting portion 122. The mounting portion 122 has the aforementioned mounting hole 121. Both connecting portions 123 are plate-shaped, with one connecting portion 123 used to connect to the drive assembly 110 and the other connecting portion 123 used to connect to the output shaft 130. The connection method between the connecting portion 123 and the output shaft 130 is conventional and will not be described in detail. Furthermore, a mounting space 160a is formed between one side of the connecting portion 123 and the mounting member 160. Two sets of guide rail assemblies 150 are respectively mounted on both sides of the mounting portion 122 and located within the mounting space 160a, thereby positioning the two sets of guide rail assemblies 150 on both sides of the magnetic spring 140. Figure 2 As shown. This structural design makes the force on the connector 120 more balanced, improving the smoothness of the connector 120's movement.

[0024] Combination Figure 3 , Figure 5 As shown, in this embodiment, the connecting portion 123 has a first side surface 1231 and a second side surface 1232 facing each other. The first side surface 1231 is adjacent to the mounting member 160, forming a mounting space 160a between the first side surface 1231 and the mounting member 160. The mounting portion 122 includes a first mounting portion 1221 protruding from the first side surface 1231 and a second mounting portion 1222 protruding from the second side surface 1232. Furthermore, the height of the first mounting portion 1221 from the first side surface 1231 is greater than the height of the second mounting portion 1222 from the second side surface 1232. This structural arrangement of the mounting portion 122 makes the mounting space 160a formed between the first side surface 1231 and the mounting member 160 sufficient to mount two sets of guide rail assemblies 150, while also reducing the overall height of the mounting portion 122. This reduces the space occupied in the thickness direction by the entire connecting member 120, thereby making the linear actuator 100 smaller. Continue to combine Figures 2-5As shown, in this embodiment, the first mounting portion 1221 is located within the mounting space 160a and abuts against the mounting member 160. The first mounting portion 1221 divides the mounting space 160a into a first space and a second space. Two sets of guide rail assemblies 150 are respectively mounted in the first space and the second space, and each set of guide rail assemblies 150 abuts against the sidewalls of the first mounting portion 1221 and the mounting member 160, as shown. Figure 2 As shown. This positions the guide rail assembly 150 for installation and makes the positions of the two sets of guide rail assemblies 150 basically symmetrical, thereby providing a more stable guiding effect.

[0025] More preferably, the connector 120, the mounting part 160, and the two sets of guide rail assemblies 150 are all symmetrically arranged relative to the motion module 141. That is, the magnetic spring 140 is installed at approximately the center of the connector 120, thereby making the force on the connector 120 more balanced. Combined with the guiding effect of the two sets of symmetrical guide rail assemblies 150, the movement of the connector 120 is more stable.

[0026] The following is combined Figures 3-4 As shown, in one embodiment of this utility model, the mounting member 160 includes a first plate-shaped portion 161 and second plate-shaped portions 162 and third plate-shaped portions 163 connected to opposite sides of the first plate-shaped portion 161. The second plate-shaped portions 162 and third plate-shaped portions 163 are arranged at an angle to the first plate-shaped portion 161. In a specific embodiment, the second plate-shaped portions 162 and third plate-shaped portions 163 are preferably arranged at right angles to the first plate-shaped portion 161, thereby making the mounting member 160 as a whole U-shape. Of course, the structure and shape of the mounting member 160 are not limited to this. Figure 2 As shown, when the mounting member 160 is installed, the first plate-shaped portion 161 is mounted on the housing 170, and the second plate-shaped portion 162 and the third plate-shaped portion 163 face the connector 120. The first plate-shaped portion 161, the second plate-shaped portion 162, the third plate-shaped portion 163, and the connector 120 together form the aforementioned mounting space 160a. Furthermore, the first mounting portion 1221 is located within the mounting space 160a and abuts against the first plate-shaped portion 161, thereby dividing the mounting space 160a into a first space and a second space. Two sets of guide rail assemblies 150 are respectively installed in the first space and the second space, as shown... Figure 2 As shown, the guide rail assembly 150 abuts against the first mounting portion 1221 and the second plate-shaped portion 162, or against the first mounting portion 1221 and the third plate-shaped portion 163. This structural arrangement of the mounting member 160 facilitates the installation and positioning of the two sets of guide rail assemblies 150, and makes the overall structure more compact.

[0027] Continue to combine Figures 3-4As shown, in one embodiment of this utility model, the guide rail assembly 150 includes a first rail 151, a second rail 152, and a rolling element assembly 153. The first rail 151 and the second rail 152 are arranged parallel to each other, and in the moving direction of the connector 120, the two ends of the first rail 151 and the second rail 152 are staggered, as shown below. Figure 3 As shown. The rolling element assembly 153 is disposed between the first track 151 and the second track 152, and the rolling element assembly 153 rolls against the first track 151 and the second track 152 to move linearly along the first track 151 and the second track 152. The length of the rolling element assembly 153 is less than the length of the overlapping portion of the first track 151 and the second track 152, as shown. Figure 3 As shown. Combined with Figure 2 As shown, after the guide rail assembly 150 is installed in the installation space 160a, the first rail 151 and the second rail 152 abut against the first mounting part 1221 and the second plate-shaped part 162, or abut against the first mounting part 1221 and the third plate-shaped part 163, respectively. At the same time, the top of the rolling element assembly 153 is connected to the connector 120, and the linear movement of the rolling element assembly 153 guides the movement of the connector 120.

[0028] Continue to combine Figures 3-4 As shown, in one embodiment of this utility model, the guide rail assembly 150 is preferably a cross roller guide rail. Two sets of cross roller guide rails are respectively installed in the first space and the second space, and each set of cross roller guide rails abuts against the first mounting part 1221 and the second plate-shaped part 162, or abuts against the first mounting part 1221 and the third plate-shaped part 163, which facilitates the symmetrical installation of the two sets of cross roller guide rails, and positions the cross roller guide rails through the first mounting part 1221 and the second plate-shaped part 162 or the first mounting part 1221 and the third plate-shaped part 163.

[0029] Understandably, the guide rail assembly 150 is not limited to using cross roller guides; other guide components may also be used.

[0030] The following is combined Figure 2-3 , Figure 5-6 As shown, in one embodiment of this utility model, the motion module 141 of the magnetic spring 140 includes at least a sleeve 1411 with a cylindrical structure. The sleeve 1411 is installed in the aforementioned mounting hole 121 and fixedly connected to the connector 120, and the sleeve 1411 and the connector 120 have the same length. Figure 3 , Figure 6As shown. The motion module 141 moves synchronously with the connector 120. The fixing module 142 includes a positioning element 1421, a mounting tube 1422, and at least one magnet 1423. The magnet 1423 is installed inside the mounting tube 1422. The positioning element 1421 is inserted into both ends of the mounting tube 1422 and abuts against the magnet 1423 and the mounting tube 1422 respectively. Figure 6 As shown, the magnet 1423 is stably installed inside the mounting tube 1422, and the total length of the magnet 1423 is greater than the length of the sleeve 1411.

[0031] See Figure 6 As shown, in one specific embodiment, the fixing module 142 includes two magnets 1423. The lengths of the two magnets 1423 may be the same or different, and this is not limited here. The two magnets 1423 are sequentially installed inside the mounting tube 1422. After the positioning member 1421 is inserted into both ends of the mounting tube 1422, it abuts against the ends of the two magnets 1423 respectively, thereby achieving stable installation of the two magnets 1423. Of course, the number of magnets 1423 can be flexibly set according to specific usage requirements.

[0032] Combined again Figures 1-6 As shown, when the linear actuator 100 of this invention is working, the drive assembly 110 drives the connecting member 120 to move linearly, and the connecting member 120 drives the output shaft 130 to move linearly. During the movement of the connecting member 120, the motion module 141 of the magnetic spring 140 located approximately in the middle of the connecting member 120 moves synchronously with the connecting member 120. The fixed module 142 is connected to the housing 170, so that the motion module 141 of the magnetic spring 140 moves along its fixed module 142, generating an elastic force on approximately the middle of the connecting member 120, making the elastic force on the connecting member 120 more balanced and stable. During this process, the movement of the connecting member 120 is guided by two sets of guide rail assemblies 150 on both sides of the motion module 141, making the movement of the connecting member 120 smoother.

[0033] In summary, the linear actuator 100 of this utility model installs the magnetic spring 140 in approximately the middle of the connector 120. Specifically, its motion module 141 is installed in the mounting hole 121 opened on the connector 120 and fixedly connected to the connector 120. Then, its fixing module 142 is inserted through the connector 120 with both ends extending out of the connector 120. Then, two sets of guide rail assemblies 150 are respectively set on both sides of the motion module 141, and both sets of guide rail assemblies 150 are set between the connector 120 and the housing 170. Therefore, the elastic force generated by the magnetic spring 140 is more balanced and stable. Moreover, the elastic force generated by the magnetic spring 140 acts on approximately the middle of the connector 120, making the force on the connector 120 more balanced during movement. During movement, the two sets of guide rail assemblies 150 on both sides of the motion module 141 provide guidance, thereby improving the smoothness of the movement of the connector 120 and making the movement of the output shaft 130 more stable.

[0034] 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.

[0035] 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, include: case; The drive assembly is installed inside the housing; A connector is movably mounted within the housing and connected to the drive assembly, the connector being driven by the drive assembly to move in a straight line; An output shaft is mounted on the connector, and the output shaft can move linearly under the drive of the connector; A magnetic spring is disposed within the housing. The magnetic spring includes a fixing module and a moving module. The fixing module is connected to the housing, and the moving module is connected to the connecting member. Two sets of guide rail assemblies are respectively disposed on both sides of the motion module, and both sets of guide rail assemblies are disposed between the connector and the housing; The connector has a through mounting hole, the motion module is located in the mounting hole and fixedly connected to the connector, and the fixing module passes through the connector and extends out of the connector at both ends.

2. The linear actuator as described in claim 1, characterized in that, It also includes a mounting component, which is installed on the housing and located between the housing and the connector, forming an installation space between the mounting component and the connector; the two sets of the guide rail assemblies are respectively installed in the installation space.

3. The linear actuator as described in claim 2, characterized in that, The connector includes a columnar mounting portion and plate-shaped connecting portions on both sides of the mounting portion. The mounting portion has mounting holes. One connecting portion is used to connect the drive assembly, and the other connecting portion is used to connect the output shaft. The two sets of guide rail assemblies are respectively mounted on both sides of the mounting portion.

4. The linear actuator as described in claim 3, characterized in that, The connecting portion has a first side and a second side opposite to each other, and the first side and the mounting member form the mounting space; The mounting portion includes a first mounting portion protruding from the first side and a second mounting portion protruding from the second side, wherein the height of the first mounting portion from the first side is greater than the height of the second mounting portion from the second side.

5. The linear actuator as described in claim 4, characterized in that, The first mounting part divides the mounting space into a first space and a second space; The guide rail assembly is a cross roller guide rail, and two sets of the cross roller guide rails are respectively installed in the first space and the second space, and each set of the cross roller guide rails abuts against the first mounting part.

6. The linear actuator as described in claim 5, characterized in that, The mounting component includes a first plate-shaped portion and a second plate-shaped portion and a third plate-shaped portion connected to opposite sides of the first plate-shaped portion, wherein the second plate-shaped portion and the third plate-shaped portion are arranged at an angle to the first plate-shaped portion; The first plate-shaped portion, the second plate-shaped portion, the third plate-shaped portion, and the connector form the mounting space, and the two sets of cross roller guides respectively abut against the second plate-shaped portion and the third plate-shaped portion.

7. The linear actuator as claimed in claim 1, characterized in that, The motion module includes a sleeve with a cylindrical structure, which is installed in the mounting hole and fixed to the connector, and the sleeve and the connector have the same length. The fixing module includes a positioning component, a mounting tube, and at least one magnet. The magnet is installed inside the mounting tube. The positioning component is inserted into both ends of the mounting tube and abuts against the magnet and the mounting tube, respectively. The total length of the magnet is greater than the length of the sleeve.

8. The linear actuator as described in claim 2, characterized in that, The guide rail assembly includes a first rail, a second rail, and a rolling element assembly. The first rail and the second rail are installed parallel to each other in the installation space. The rolling element assembly rolls against the first rail and the second rail to move linearly along the first rail and the second rail. The rolling element assembly is also connected to the connector.

9. The linear actuator as described in claim 8, characterized in that, The ends of the first track and the second track are staggered, and the length of the rolling element assembly is less than the length of the overlapping portion of the first track and the second track.

10. The linear actuator as claimed in claim 2, characterized in that, The connector, the mounting component, and the two sets of guide rail assemblies are all symmetrically arranged relative to the motion module.

Images