Linear rotary actuator

Abstract

The utility model discloses a linear rotation actuator, including in the linear drive subassembly, rotation drive subassembly, output shaft, airtight adapter assembly and gas path subassembly of casing. Linear drive subassembly is connected output shaft through connecting component, to drive output shaft and move along the line, and rotation drive subassembly connects output shaft to drive its rotation. The tail end of output shaft is sealedly connected through airtight adapter assembly and gas path subassembly. Among them, airtight adapter assembly includes adapter and sealing element, and forms a containing space in adapter, and output shaft stretches into containing space and is linked with each other, and sealing element sets up in containing space and is respectively abuts adapter and output shaft, is used for sealing the clearance between output shaft and adapter. This in the tail end of output shaft sets up airtight adapter assembly to realize the mode of gas path intercommunication, makes the sealing difficulty between output shaft and airtight adapter assembly reduce, and assembly difficulty reduces, and makes the connecting structure more simple, thereby makes production cost greatly reduce.

Description

Technical Field

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

[0002] A linear rotary actuator is a device that can simultaneously output linear and rotary motion, and can also create negative pressure in the output shaft to adsorb and transport materials. It is widely used in automated processing fields such as semiconductor chip processing, electronic equipment processing, and machining.

[0003] In existing linear rotary actuators, the hollow output shaft typically has a through hole on its side wall communicating with its interior. A rotary connecting assembly is used to achieve a sealed connection between the through hole and the air pipe. Simultaneously, the tail end of the output shaft needs to be connected to the mover of the rotary motor via a coupling structure. This existing connection method with the air pipe presents significant challenges in sealing the output shaft and the rotary connecting assembly, as well as in assembly, resulting in high overall production costs for the linear rotary actuator. Furthermore, the complex structure between the output shaft and the rotary motor increases the size and assembly difficulty, further raising production costs. Utility Model Content

[0004] The technical solution of this utility model is as follows: A linear rotary actuator is provided, comprising a housing, a linear drive assembly, a rotary drive assembly, an output shaft, an airtight adapter assembly, and an air passage assembly; wherein, the linear drive assembly and the rotary drive assembly are respectively installed in the housing; the output shaft is connected to the rotary drive assembly, and the output shaft can rotate under the drive of the rotary drive assembly; the linear drive assembly is used to drive the rotary drive assembly and the output shaft to move in a straight line, and one end of the output shaft can extend out of the housing; the airtight adapter assembly includes an adapter and a seal, the adapter has a receiving space, the other end of the output shaft extends into the receiving space and communicates with the receiving space, the seal is disposed in the receiving space and abuts against the adapter and the output shaft respectively, and the seal is used to seal the gap between the adapter and the output shaft; the air passage assembly is disposed in the housing, the air passage assembly is connected to the adapter and communicates with the receiving space.

[0005] Preferably, the airtight adapter assembly further includes a sealing cover, which is connected to the adapter and covers the opening of the accommodating space; the sealing cover has a mounting hole communicating with the accommodating space, and the output shaft passes through the mounting hole and extends into the accommodating space, thereby improving the sealing effect.

[0006] Preferably, the accommodating space includes at least a first segment and a second segment arranged sequentially along the axial direction of the output shaft. The cross-sectional area of ​​the first segment along the radial direction of the output shaft is larger than that of the second segment along the radial direction of the output shaft. The output shaft passes through the first segment and extends into the second segment. The sealing element is disposed in the first segment, and a vent hole is provided on the inner wall of the second segment. The air passage assembly communicates with the accommodating space through the vent hole. Air passage communication and sealing are achieved through an adapter connected to the tail of the output shaft and a sealing element, simplifying the air passage and sealing structure and reducing sealing and assembly difficulties.

[0007] Preferably, the airway assembly includes an air tube and an air nozzle, the air nozzle is installed in the vent, and the air tube is connected to and communicates with the air nozzle.

[0008] Preferably, a protrusion is provided on one side of the sealing cap, the protrusion extends into the first section, and the sealing element abuts against the protrusion, thereby making the installation of the sealing element convenient and the sealing effect better.

[0009] Preferably, the seal is fitted onto the output shaft and abuts against the output shaft and the sealing cover to seal the gap between the output shaft and the sealing cover.

[0010] Preferably, the seal also abuts against the inner wall of the first section to seal the gap between the output shaft and the adapter.

[0011] Preferably, there are two seals, both of which are sealing rings, and the two sealing rings are arranged sequentially along the axial direction of the output shaft and abut against each other.

[0012] Preferably, the linear rotary actuator further includes a mounting component, with the airtight adapter connected to one end of the mounting component and the rotary drive component connected to the other end of the mounting component; the output shaft passes sequentially through the rotary drive component, the mounting component, and the airtight adapter component. The mounting component facilitates the assembly of the rotary drive component and the airtight adapter component, and also improves the sealing performance of the airtight adapter component.

[0013] Preferably, the linear rotary actuator further includes a connecting component, which is movably mounted within the housing and connected to the linear drive component. The connecting component is also connected to the mounting member. The connecting component can be driven by the linear drive component to move linearly, thereby causing the mounting member to move linearly.

[0014] Preferably, one end of the mounting member has a protruding annular insertion portion that extends into the housing of the rotary drive assembly. A bearing is disposed within the insertion portion, and the output shaft is mounted in the bearing. The adapter is connected to the end of the mounting member furthest from the insertion portion. This structural design of the mounting member facilitates a more convenient sealing connection between the mounting member and the output shaft, as well as the airtight adapter assembly.

[0015] Preferably, the linear rotary actuator further includes an encoder disposed within the mounting member, the encoder being sleeved outside the output shaft for detecting rotational information of the output shaft.

[0016] Preferably, the encoder includes a code disk holder, a code disk, and a read head assembly. The output shaft passes sequentially through the code disk holder, the code disk, and the read head assembly. The code disk is connected to the code disk holder and fixedly connected to the output shaft. The code disk holder also abuts against the bearing. This structural design of the mounting component provides sufficient installation space for the encoder, making installation more convenient.

[0017] Preferably, the code disk holder includes a plate-shaped first mounting portion and a ring-shaped second mounting portion protruding from the first mounting portion. The second mounting portion passes through the output shaft and abuts against the bearing. The first mounting portion connects to the code disk sleeved on the output shaft.

[0018] Compared with the prior art, the linear rotary actuator of this utility model has an airtight adapter assembly at the tail end of the output shaft. The air passage assembly is connected to the interior of the output shaft through the airtight adapter assembly. The airtight adapter assembly includes an adapter and a seal. An accommodating space is formed inside the adapter. The tail end of the output shaft enters and communicates with the accommodating space. The seal is located in the accommodating space and abuts against the adapter and the output shaft respectively. The seal is used to seal the gap between the adapter and the output shaft. This reduces the sealing difficulty between the output shaft and the airtight adapter assembly, reduces the assembly difficulty, and thus reduces the overall production cost of the linear rotary actuator. In addition, the airtight adapter assembly is used to seal the connection between the tail end of the output shaft and the rotary drive assembly. Compared with the coupling structure used in the prior art, the connection structure of this application is simpler, reduces the size and assembly difficulty, and further reduces the production cost. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the linear rotary actuator of this utility model.

[0020] Figure 2 yes Figure 1 A schematic diagram of the internal structure.

[0021] Figure 3 yes Figure 2 The exploded diagram.

[0022] Figure 4 yes Figure 3 Exploded view of the output shaft, rotary drive assembly, and airtight adapter assembly.

[0023] Figure 5 yes Figure 4 A structural diagram from another angle.

[0024] Figure 6 yes Figure 4 Exploded view of the gas-tight transition assembly.

[0025] Figure 7 yes Figure 6 A structural diagram from another angle.

[0026] Figure 8 yes Figure 2 A partial sectional view. Detailed Implementation

[0027] 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.

[0028] First combine Figures 1-8As shown, in one embodiment of this utility model, the provided linear rotary actuator 100 includes a linear drive assembly 110, a connecting assembly 120, an output shaft 130, a rotary drive assembly 140, an airtight adapter assembly 160, an air passage assembly 170, and a housing 190. The linear drive assembly 110 and the rotary drive assembly 140 are respectively installed within the housing 190. The connecting assembly 120 is movably installed within the housing 190 and connected to the linear drive assembly 110, and the connecting assembly 120 can be driven by the linear drive assembly 110 to move linearly. The output shaft 130 is connected to the connecting assembly 120 and the rotary drive assembly 140. The output shaft 130 can rotate under the drive of the rotary drive assembly 140 and can move linearly under the drive of the connecting assembly 120, and one end of the output shaft 130 can extend out of the housing 190. The airtight adapter assembly 160 is installed at the end of the output shaft 130 located within the housing 190, and the airtight adapter assembly 160 communicates with the interior of the output shaft 130. The pneumatic circuit assembly 170 is disposed within the housing 190, and one end of the pneumatic circuit assembly 170 is connected to the interior of the airtight transition assembly 160. This allows the pneumatic circuit assembly 170, the airtight transition assembly 160, and the interior of the output shaft 130 to be sequentially connected to form an pneumatic circuit, thereby supplying air to the interior of the output shaft 130. In this application, the tail end of the output shaft 130 is sealed to the pneumatic circuit assembly 170. Compared to using a rotary connection assembly on the side wall of the output shaft 130 for sealing, this application reduces the sealing difficulty and assembly difficulty between the output shaft 130 and the airtight transition assembly 160, thus reducing the overall production cost of the linear rotary actuator 100.

[0029] The following is combined with Figure 2-3 As shown, in one embodiment of this utility model, the linear rotary actuator 100 further includes a mounting member 150. The mounting member 150 is connected to the connecting assembly 120, the airtight adapter assembly 160 is connected to one end of the mounting member 150, and the rotary drive assembly 140 is connected to the other end of the mounting member 150. The output shaft 130 passes through the rotary drive assembly 140, the mounting member 150, and the airtight adapter assembly 160 in sequence. Therefore, during the process of the linear drive assembly 110 driving the connecting assembly 120 to move linearly, the connecting assembly 120 drives the mounting member 150, the rotary drive assembly 140, and the output shaft 130 to move synchronously linearly. In this embodiment, the mounting member 150 is provided to mount the rotary drive assembly 140 and the airtight adapter assembly 160, and is connected to the connecting assembly 120 through the mounting member 150, making the assembly of the rotary drive assembly 140, the airtight adapter assembly 160, and the connecting assembly 120 more convenient and making the structure of the three more compact.

[0030] The following is combined with Figures 4-8As shown, in one embodiment of this utility model, the airtight adapter assembly 160 includes an adapter 161, a sealing cap 162, and a sealing element 163. The sealing cap 162 is connected to the adapter 161, and a receiving space 1611 is formed between them, as shown in the figure. Figure 5 , Figure 7-8 As shown. One end of the output shaft 130 passes through the sealing cover 162 and extends into the accommodating space 1611. The sealing element 163 is disposed within the accommodating space 1611 and is used to seal the gap between the output shaft 130 and the sealing cover 162. One end of the air passage assembly 170 is connected to the adapter 161 and communicates with the accommodating space 1611, thereby connecting the air passage assembly 170, the accommodating space 1611 of the airtight adapter assembly 160, and the interior of the output shaft 130 in sequence to form an air passage.

[0031] Continue to combine Figures 4-8 As shown, in one embodiment of this utility model, the accommodating space 1611 includes at least a first segment 1611a and a second segment 1611b arranged sequentially along the axial direction of the output shaft 130. The cross-sectional area of ​​the first segment 1611a along the radial direction of the output shaft 130 is larger than the cross-sectional area of ​​the second segment 1611b along the radial direction of the output shaft 130. Figure 8 As shown. The sealing cap 162 is installed in the first section 1611a of the accommodating space 1611, and covers the opening of the accommodating space 1611. The sealing element 163 is disposed within the first section 1611a. After the output shaft 130 is installed, the output shaft 130 passes sequentially through the sealing cap 162, the first section 1611a, and extends into the second section 1611b, as shown. Figure 8 As shown, the seal 163 is fitted over the output shaft 130 and abuts against the inner wall of the first section 1611a and the sealing cover 162 to seal the gap between the output shaft 130, the sealing cover 162, and the adapter 161. This structural design of the adapter 161 simplifies the sealing structure at the tail of the output shaft 130 and makes the assembly of the sealing cover 162 and the seal 163 easier. The sealing effect between the sealing cover 162, the adapter 161, and the seal 163 is better, thereby reducing the difficulty of sealing and assembly.

[0032] Continue reading Figure 7-8 As shown, in this embodiment, the adapter 161 has a vent 1612 communicating with the accommodating space 1611, and the vent 1612 specifically penetrates the inner wall of the second section 1611b of the accommodating space 1611. Combined with... Figure 4 , Figure 8 As shown, the air passage assembly 170 is connected to the second section 1611b through the vent 1612, thereby achieving communication with the accommodating space 1611.

[0033] Combination Figures 2-5As shown, in one embodiment of this utility model, the air passage assembly 170 includes an air nozzle 171 and an air tube 172. The air nozzle 171 is installed in the vent 1612, and the air tube 172 is connected to and communicates with the air nozzle 171. The installation methods of the air tube 172 and the air nozzle 171 are conventional methods in the art. The aforementioned communication method between the adapter 161 and the air passage assembly 170 simplifies the air passage communication and sealing connection, thereby reducing the difficulty of sealing and assembly.

[0034] Continue to combine Figures 4-8 As shown, in this embodiment, a protrusion 1621 is provided on one side of the sealing cover 162, and the outer diameter of the protrusion 1621 corresponds to the inner diameter of the first segment 1611a of the accommodating space 1611. The sealing cover 162 also has a mounting hole 1622 penetrating the protrusion 1621, such as... Figure 6 As shown. Combined with Figures 5-8 As shown, when the sealing cap 162 and the adapter 161 are assembled, the protrusion 1621 extends into the first segment 1611a of the accommodating space 1611, while the sealing cap 162 is located outside the accommodating space 1611 and abuts against the end face of the adapter 161. At this time, the outer surface of the protrusion 1621 abuts against the inner surface of the first segment 1611a, and the accommodating space 1611 is formed between the end of the protrusion 1621 and the inner wall of the first segment 1611a. See also... Figure 8 As shown, after the output shaft 130 is installed, it passes through the mounting hole 1622 and extends into the first section 1611a and the second section 1611b. The seal 163 is fitted onto the output shaft 130 and abuts against the output shaft 130, the protrusion 1621, and the inner wall of the first section 1611a to seal the gap between the output shaft 130 and the sealing cover 162 and the adapter 161. The structural design of the sealing cover 162 and the adapter 161 facilitates the installation of the seal 163 and provides a better sealing effect.

[0035] See Figure 6-8 As shown, in a preferred embodiment of this utility model, two sealing elements 163 are provided, both of which are sealing rings. The two sealing rings are arranged sequentially along the axial direction of the output shaft 130 and abut against each other. It is understood that the sealing element 163 is not limited to sealing rings, and other sealing components can also be used.

[0036] Recombined Figures 4-8As shown, in one embodiment of this utility model, a mounting space 151 is formed within the mounting member 150, and the mounting space 151 extends through both ends of the mounting member 150. Furthermore, one end of the mounting member 150 has a protruding annular insertion portion 152. When the mounting member 150 and the rotary drive assembly 140 are assembled, the insertion portion 152 extends into the housing of the rotary drive assembly 140, and a bearing 153 is disposed within the insertion portion 152. The output shaft 130 is mounted in the bearing 153, making the sealing connection between the mounting member 150 and the output shaft 130 more convenient.

[0037] See Figure 8 As shown, the airtight adapter 160 is installed at the end of the mounting member 150 away from the insertion portion 152. Specifically, the sealing cap 162 is housed within the mounting space 151 of the mounting member 150, and the end face of the adapter 161 abuts against the end face of the mounting member 150 away from the insertion portion 152. Then, the adapter 161 and the mounting member 150 are locked together using a locking element (such as a screw), thereby achieving a sealed installation of the airtight adapter 160, making the sealed connection between the mounting member 150 and the airtight adapter 160 more convenient and providing a better sealing effect.

[0038] Continue to combine Figures 4-8 As shown, in one embodiment of this utility model, the linear rotary actuator 100 further includes an encoder 180, which is sleeved outside the output shaft 130 and housed within the mounting space 151 of the mounting member 150. Specifically, the encoder 180 includes a code disk holder 181, a code disk 182, and a reading head assembly 183. The output shaft 130 passes sequentially through the code disk holder 181, the code disk 182, and the reading head assembly 183, and the code disk holder 181 also abuts against the bearing 153, as shown. Figure 8 As shown, the code disk 182 is connected to the code disk mounting base 181, and the code disk 182 is also fixedly connected to the output shaft 130. The code disk 182 and the reading head assembly 183 are spaced apart. The structural design of the mounting component 150 also provides sufficient installation space for the encoder 180, making the installation of the encoder 180 more convenient.

[0039] See in combination Figure 5 , Figure 8 As shown, in this embodiment, the code disk holder 181 includes a plate-shaped first mounting portion 1811 and a ring-shaped second mounting portion 1812 protruding from the first mounting portion 1811. Both the first mounting portion 1811 and the second mounting portion 1812 pass through the output shaft 130, with the second mounting portion 1812 abutting against the bearing 153, and the first mounting portion 1811 connecting to the code disk 182. Of course, the structure of the code disk holder 181 is not limited to that in this embodiment, and other structures can also be used.

[0040] Recombined Figures 1-8As shown, when the linear rotary actuator 100 of this utility model is working, the drive assembly 110 drives the connecting assembly 120 to move linearly, and the connecting assembly 120 drives the mounting part 150, the rotary drive assembly 140, the output shaft 130, and the airtight adapter assembly 160 to move synchronously linearly. During this process, the output shaft 130 can rotate under the drive of the rotary drive assembly 140.

[0041] During the linear movement and rotation of the output shaft 130, the air passage assembly 170 supplies air to the tail of the output shaft 130 through the airtight transition assembly 160, thereby supplying air to the interior of the output shaft 130. Because the airtight transition assembly 160 achieves a sealed connection with the air passage assembly 170 at the tail of the output shaft 130, the sealing difficulty between the output shaft 130 and the airtight transition assembly 160 is reduced, and the sealing effect between the two is improved.

[0042] In summary, the linear rotary actuator 100 of this invention features an airtight adapter 160 at the tail end of the output shaft 130, through which the pneumatic assembly 170 connects to the interior of the output shaft 130. The airtight adapter 160 includes an adapter 161 and a seal 163. The adapter 161 forms an accommodating space, through which the tail end of the output shaft 130 passes via a sealing cover 162 and extends into and communicates with the accommodating space. The seal 163 is disposed within the accommodating space and abuts against both the adapter 161 and the output shaft 130. The airtight adapter 160 is used to seal the gap between the adapter 161 and the output shaft 130, thereby reducing the sealing difficulty between the output shaft 130 and the airtight adapter 160, reducing the assembly difficulty, and thus reducing the overall production cost of the linear rotary actuator 100. In addition, the airtight adapter 160 is used to seal the connection between the tail of the output shaft 130 and the rotary drive assembly 140. Compared with the connection method using a coupling structure in the prior art, the connection structure of this application is simpler, reduces the size and assembly difficulty, and further reduces the production cost.

[0043] The structures of the other parts of the linear rotary actuator 100 involved in this application are all conventional structures well known to those skilled in the art, and will not be described in detail.

[0044] 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 rotary actuator, characterized in that, include: case; A rotary drive assembly is installed inside the housing; An output shaft is connected to the rotary drive assembly, and the output shaft can rotate under the drive of the rotary drive assembly; A linear drive assembly is installed inside the housing. The linear drive assembly is used to drive the rotary drive assembly and the output shaft to move in a straight line, and one end of the output shaft can extend out of the housing. An airtight adapter assembly includes an adapter and a seal. The adapter has a receiving space, and the other end of the output shaft extends into and communicates with the receiving space. The seal is disposed in the receiving space and abuts against the adapter and the output shaft respectively. The seal is used to seal the gap between the adapter and the output shaft. An air passage assembly is disposed within the housing, the air passage assembly is connected to the adapter, and communicates with the accommodating space.

2. The linear rotary actuator as described in claim 1, characterized in that, The airtight adapter assembly also includes a sealing cover, which is connected to the adapter and covers the opening of the accommodating space; the sealing cover has a mounting hole communicating with the accommodating space, and the output shaft passes through the mounting hole and extends into the accommodating space.

3. The linear rotary actuator as described in claim 2, characterized in that, The accommodating space includes at least a first segment and a second segment arranged sequentially along the axial direction of the output shaft. The cross-sectional area of ​​the first segment along the radial direction of the output shaft is greater than the cross-sectional area of ​​the second segment along the radial direction of the output shaft. The output shaft passes through the first segment and extends into the second segment. The sealing element is disposed in the first segment. A vent hole is provided on the inner wall of the second segment. The air passage assembly communicates with the accommodating space through the vent hole.

4. The linear rotary actuator as described in claim 3, characterized in that, The air circuit assembly includes an air tube and an air nozzle. The air nozzle is installed in the air vent, and the air tube is connected to and communicates with the air nozzle.

5. The linear rotary actuator as described in claim 3, characterized in that, A protrusion is provided on one side of the sealing cap, the protrusion extends into the first section, and the sealing element abuts against the protrusion.

6. The linear rotary actuator as described in claim 2, characterized in that, The seal is fitted onto the output shaft and abuts against the output shaft and the sealing cover to seal the gap between the output shaft and the sealing cover.

7. The linear rotary actuator as claimed in claim 1, characterized in that, It also includes a mounting component, the adapter is connected to one end of the mounting component, and the rotary drive assembly is connected to the other end of the mounting component; the output shaft passes through the rotary drive assembly, the mounting component and the airtight adapter assembly in sequence.

8. The linear rotary actuator as claimed in claim 7, characterized in that, The linear rotary actuator further includes a connecting assembly, which is movably mounted within the housing and connected to the linear drive assembly. The connecting assembly is also connected to the mounting member. The connecting assembly can be driven by the linear drive assembly to move along a straight line, thereby causing the mounting member to move along a straight line.

9. The linear rotary actuator as claimed in claim 7, characterized in that, One end of the mounting component has a protruding annular insertion portion, which extends into the housing of the rotary drive assembly. A bearing is provided inside the insertion portion, and the output shaft is installed in the bearing. The adapter is connected to the end of the mounting component away from the insertion portion.

10. The linear rotary actuator as claimed in claim 7, characterized in that, It also includes an encoder disposed within the mounting component, the encoder being connected to the output shaft for detecting rotational information of the output shaft.

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