An electric push rod of an adaptive installation station

Abstract

The application relates to the technical field of electric rods, in particular to a self-adaptive electric push rod of a mounting station, which comprises a base, a motor, an outer pipe and a bottom shell arranged on the base, a screw rod rotationally arranged on the base, a torque piece arranged between the output shaft of the motor and the screw rod for transmitting torque, a sliding block with a polygonal cross section threadedly connected to the screw rod, an extension pipe arranged on the sliding block, the extension pipe being coaxially sleeved on the screw rod, the outer pipe being coaxially sleeved on the extension pipe, the sliding block being in sliding fit with the outer pipe, an end column coaxially arranged at one end of the extension pipe away from the sliding block, a bottom column arranged on the bottom shell, mounting shaft holes being arranged on the end column and the bottom column, and an adaptive shaft assembly arranged between the bottom column and the bottom shell, the adaptive shaft assembly being used for changing and fixing the included angle between the axis of the bottom column and the axis of the screw rod. The application has the effects of installation precision and cost.

Description

Technical Field

[0001] This application relates to the field of electric pole technology, and in particular to an electric push rod with an adaptive installation position. Background Technology

[0002] An electric linear actuator is an electrically driven device that converts the rotary motion of an electric motor into the linear reciprocating motion of a linear actuator. It mainly consists of a bottom housing, drive motor, reduction gear, screw, and actuator, and can be used as an actuator in various simple or complex processes to achieve remote, centralized, or automatic control. It has wide applications in industrial automation, medical equipment, and smart home technology.

[0003] Currently, in existing electric linear actuators, both the actuator end and the bottom housing are provided with mounting shaft holes, and the axes of the two mounting shaft holes are usually parallel. During installation, the actuator end and the bottom housing of the electric linear actuator are fixed to different structures by means of plug-in shafts, thereby realizing rotation or translation between different structures.

[0004] However, in actual installation, the shaft is usually pre-installed on different structures. Therefore, the axis direction of the shaft is actually fixed during installation. But due to the different spatial positions of different structures, the axes of the shafts on different structures may not be parallel due to installation accuracy issues. This can easily lead to installation failure or jamming at the connection between the electric linear actuator and the shaft during the rotation of the driven structure after installation, greatly affecting the service life of the electric linear actuator. In order to ensure the stable working performance of the electric linear actuator after installation, extremely high installation accuracy is required, which can easily lead to an increase in installation costs, indicating a significant drawback. Summary of the Invention

[0005] To address the issue of high installation accuracy requirements when installing electric linear actuators between different structures, this application provides an electric linear actuator with an adaptive installation position.

[0006] The electric push rod for an adaptive installation station provided in this application adopts the following technical solution: An adaptive electric actuator for an installation station includes a base, on which a motor, an outer tube, and a bottom shell are mounted. A screw is rotatably mounted on the base. A torque transmission element is provided between the output shaft of the motor and the screw. A slider with a polygonal cross-section is threaded onto the screw. A telescopic tube is mounted on the slider and coaxially sleeved on the screw. The outer tube is coaxially sleeved on the telescopic tube. The slider and the outer tube are in sliding engagement. An end post is coaxially mounted on the end of the telescopic tube facing away from the slider. A bottom post is arranged on the bottom shell. Both the end post and the bottom post have mounting shaft holes. An adaptive shaft assembly is provided between the bottom post and the bottom shell. The adaptive shaft assembly is used to change and fix the angle between the axis of the bottom post and the axis of the screw.

[0007] By adopting the above technical solution, during the installation process, workers can change the angle between the axis of the base column and the axis of the screw through the alignment component, so that the mounting shaft holes on the end column and the base column can accommodate shafts with two different structures. Then, the position of the base column is fixed by the alignment component, which can solve the problem of non-parallelism between shafts with different structures. The motor can drive the screw to rotate through the torque component, and the rotating screw can drive the telescopic tube to extend or retract through the slider. This reduces both the installation accuracy and the installation cost.

[0008] Optionally, the torque element includes a driving gear disposed on the output shaft of the motor, a driven gear disposed on the screw, and a gear set rotatably disposed on the base between the driving gear and the driven gear, wherein both the driving gear and the driven gear mesh with the gear set.

[0009] By adopting the above technical solution, the output shaft of the motor drives the driving gear to rotate, the driving gear drives the driven gear to rotate through the gear set, and the driven gear drives the screw to rotate. During the gear set transmission process, the gear set reduces the speed of the driven gear, so that the screw has a greater torque force during rotation, thus giving the electric push rod a greater thrust effect.

[0010] Optionally, the screw has an inner end ring coaxially arranged at the end opposite to the driven gear, and the outer circumferential wall of the inner end ring is attached to the inner circumferential wall of the telescopic tube. The outer tube has an outer end ring coaxially arranged at the end opposite to the base, and the inner circumferential wall of the outer end ring is attached to the outer circumferential wall of the telescopic tube.

[0011] By adopting the above technical solution, during the sliding process of the telescopic tube, the inner and outer end rings will guide and support the telescopic tube, thereby keeping the telescopic tube straight during the extension process. At the same time, the inner end ring can also support the end of the screw away from the base, reducing the possibility of the end of the screw away from the base bending due to its own weight.

[0012] Optionally, a sealing ring is coaxially provided at one end of the outer tube facing away from the base, the outer end ring is located between the sealing ring and the outer tube, and a sealing ring is provided on the sealing ring, the sealing ring abutting against the circumferential outer wall of the telescopic tube.

[0013] By adopting the above technical solution, the sealing ring reduces the possibility of external debris entering the inner part of the outer tube and thus damaging the screw.

[0014] Optionally, the axial assembly includes a rotating disk coaxially disposed on the bottom post, the bottom post rotating through the side wall of the bottom shell, the rotating disk being located inside the bottom shell, the rotating disk being coaxially arranged with the screw, and a fastening nut being bolted to the bottom post on the outer side of the bottom shell.

[0015] By adopting the above technical solution, in three-dimensional space, when the axes of two shafts on different structures are not in a skew relationship, the installer only needs to first install the end post on one of the shafts, and then, according to the position of the other shaft, rotate the bottom post to drive the rotating disk to rotate synchronously, so that the axis of the mounting shaft hole on the bottom post can coincide with the axis of the shaft. Then, insert the shaft into the mounting shaft hole on the bottom post, and the worker can fix the bottom post to the bottom shell by tightening the fastening nut. In this process, the diameter of the shaft can be made closer to the inner diameter of the mounting shaft hole, which is beneficial to improving the accuracy of the push structure stroke of the electric push rod.

[0016] Optionally, the axial fitting assembly includes a solid hemisphere arranged on the outer side of the bottom shell, the rotation axis of the solid hemisphere coinciding with the axis of the screw, a hollow hemisphere provided on the bottom post, the inner spherical surface of the hollow hemisphere being used to abut and slide against the outer spherical surface of the solid hemisphere, a limiting ring being detachably provided on the bottom shell, the inner ring diameter of the limiting ring being larger than the diameter of the bottom post, the inner ring sidewall of the limiting ring being used to abut and slide against the outer spherical surface of the hollow hemisphere, and a positioning member for fixing the bottom post being provided on the bottom shell.

[0017] By adopting the above technical solution, when the axes of two shafts on different structures are in a non-planar relationship in three-dimensional space, the installer first installs the end post on one of the shafts. Then, based on the position of the other shaft, by rotating the bottom post, the hollow hemisphere rotates around the center of the solid hemisphere at any angle within the limiting ring, so that the axis of the mounting hole on the bottom post can coincide with the axis of the other shaft. Then, the shaft is inserted into the mounting hole on the bottom post. After that, the positioning component fixes the bottom post, greatly reducing the installation accuracy.

[0018] Optionally, the positioning element includes a limiting ring disposed on the bottom shell, the limiting ring being sleeved on the restricting ring, and a positioning bolt passing through the restricting ring, the positioning bolt being bolted to the bottom shell.

[0019] By adopting the above technical solution, the installer tightens the positioning bolts, which press the limiting ring onto the bottom shell. At this time, the inner ring sidewall of the limiting ring will press against the outer spherical surface of the hollow hemisphere, increasing the friction between the limiting ring and the hollow hemisphere, thus preventing the hollow hemisphere from moving and achieving the effect of fixing the bottom column.

[0020] Optionally, a countersunk bolt is provided on the solid hemisphere, and the countersunk bolt is bolted to the bottom shell.

[0021] By adopting the above technical solution, the difficulty of directly machining a solid hemisphere on the bottom shell is reduced, which helps to reduce production costs.

[0022] In summary, this application includes at least one of the following beneficial technical effects: During installation, workers use an alignment assembly to change the angle between the axis of the base column and the axis of the screw, so that the mounting holes on the end column and the base column can accommodate shafts with two different structures. Then, the position of the base column is fixed by the alignment assembly, which solves the problem of non-parallelism between shafts with different structures. The motor drives the screw to rotate through the torque component, and the rotating screw drives the telescopic tube to extend or retract through the slider, which reduces both installation accuracy and installation cost. In three-dimensional space, when the axes of two shafts on different structures are not skewed, the installer only needs to first install the end post on one of the shafts. Then, based on the position of the other shaft, the bottom post is rotated to drive the rotating disk to rotate synchronously, so that the axis of the mounting hole on the bottom post can coincide with the axis of the shaft. After that, the shaft is inserted into the mounting hole on the bottom post, and the worker can fix the bottom post to the bottom shell by tightening the fastening nut. In this process, the diameter of the shaft can be made closer to the inner diameter of the mounting hole, which is beneficial to improving the accuracy of the push structure stroke of the electric actuator. In three-dimensional space, when the axes of two shafts on different structures are in a non-planar relationship, the installer first installs the end post on one of the shafts. Then, based on the position of the other shaft, by rotating the bottom post, the hollow hemisphere rotates at any angle around the center of the solid hemisphere within the limiting ring, so that the axis of the mounting hole on the bottom post can coincide with the axis of the other shaft. Then, the shaft is inserted into the mounting hole on the bottom post, and the positioning component fixes the bottom post, greatly reducing the installation accuracy. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this application.

[0024] Figure 2 This is a cross-sectional view in Embodiment 1 of this application used to illustrate the positional relationship between the screw, motor and end post.

[0025] Figure 3 This is a cross-sectional view in Embodiment 2 of this application used to illustrate the positional relationship between the solid hemisphere, the hollow hemisphere, and the base column.

[0026] Figure 4 This is a cross-sectional view in Embodiment 3 of this application used to illustrate the positional relationship between the countersunk bolt, the solid hemisphere, and the retaining ring.

[0027] Explanation of reference numerals in the attached drawings: 1. Base; 2. Motor; 3. Outer tube; 4. Bottom shell; 5. Screw; 6. Torque component; 61. Driving gear; 62. Driven gear; 63. Gear set; 7. Slider; 8. Telescopic tube; 9. End post; 10. Bottom post; 11. Mounting shaft hole; 12. Shaft fitting assembly; 121. Rotating disk; 122. Fastening nut; 123. Solid hemisphere; 124. Hollow hemisphere; 125. Restricting ring; 126. Positioning component; 1261. Limiting ring; 1262. Positioning bolt; 13. Inner end ring; 14. Outer end ring; 15. Sealing ring; 16. Sealing ring; 17. Countersunk bolt. Detailed Implementation

[0028] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0029] This application discloses an electric push rod for an adaptive installation station. Example

[0030] Reference Figure 1 and Figure 2 An electric actuator for an adaptive installation station includes a base 1, on which a motor 2, an outer tube 3 and a bottom shell 4 are bolted. A screw 5 is rotatably connected to the base 1, and a torque element 6 for transmitting torque is arranged between the output shaft of the motor 2 and the screw 5.

[0031] Reference Figure 1 and Figure 2 The torque component 6 includes a drive gear 61 keyed to the output shaft of the motor 2, a driven gear 62 keyed to the screw 5, and a gear set 63 rotatably connected to the base 1 between the drive gear 61 and the driven gear 62. The gear set 63 is located between the bottom shell 4 and the base 1. The gear set 63 is composed of multiple gear sets 63 of different sizes in the prior art. Both the drive gear 61 and the driven gear 62 mesh with the gear set 63.

[0032] Reference Figure 2 A slider 7 with a polygonal cross-section is threaded onto the screw 5. A telescopic tube 8 is bolted onto the slider 7. The telescopic tube 8 is coaxially sleeved on the screw 5. The outer tube 3 is coaxially sleeved on the telescopic tube 8. The slider 7 and the inner wall of the outer tube 3 are in sliding fit.

[0033] The output shaft of motor 2 drives the drive gear 61 to rotate. The drive gear 61 drives the driven gear 62 to rotate through the gear set 63. The driven gear 62 drives the screw 5 to rotate. Under the guiding action of slider 7 and outer tube 3, slider 7 will drive telescopic tube 8 to slide along the axis of screw 5. During the transmission process of gear set 63, gear set 63 reduces the speed of driven gear 62, so that screw 5 has a greater torque force during rotation, thus giving the electric push rod a greater thrust effect.

[0034] Reference Figure 2 An inner end ring 13 is coaxially bolted to one end of the screw 5 facing away from the driven gear 62. The outer circumferential wall of the inner end ring 13 is attached to the inner circumferential wall of the telescopic tube 8. An outer end ring 14 is coaxially arranged at one end of the outer tube 3 facing away from the base 1. The inner circumferential wall of the outer end ring 14 is attached to the outer circumferential wall of the telescopic tube 8.

[0035] Reference Figure 2 The outer tube 3 is coaxially bolted with a sealing ring 15 at one end facing away from the base 1. The outer end ring 14 is located between the sealing ring 15 and the outer tube 3. Multiple sealing rings 16 are arranged on the sealing ring 15. The multiple sealing rings 16 are arranged along the axial direction of the sealing ring 15 and abut against the circumferential outer wall of the telescopic tube 8.

[0036] Reference Figure 2 One end of the telescopic tube 8 facing away from the slider 7 is coaxially bolted with an end post 9. A bottom post 10 is arranged on the bottom shell 4. Both the end post 9 and the bottom post 10 are provided with mounting shaft holes 11. An axle fitting assembly 12 is arranged between the bottom post 10 and the bottom shell 4. The axle fitting assembly 12 is used to change and fix the included angle between the axis of the bottom post 10 and the axis of the screw 5.

[0037] Reference Figure 2The shaft assembly 12 includes a rotating disk 121 that is coaxially and integrally formed on the bottom post 10. The bottom post 10 rotates through the side wall of the bottom shell 4. The rotating disk 121 is located inside the bottom shell 4. The rotating disk 121 is coaxially arranged with the screw 5. A fastening nut 122 is bolted to the bottom post 10 on the outer side of the bottom shell 4.

[0038] In three-dimensional space, when the axes of two shafts on different structures are not in a skew relationship, the installer only needs to install the end post 9 on one of the shafts first, and then, according to the position of the other shaft, rotate the bottom post 10 to drive the rotating disk 121 to rotate synchronously, so that the axis of the mounting shaft hole 11 on the bottom post 10 can coincide with the axis of the shaft.

[0039] Then, the shaft is inserted into the mounting shaft hole 11 on the base column 10. Finally, the worker tightens the fastening nut 122 to fix the base column 10 to the base shell 4. During this process, the diameter of the shaft can be made closer to the inner diameter of the mounting shaft hole 11, which helps to improve the accuracy of the push structure stroke of the electric push rod, while greatly reducing the installation accuracy.

[0040] The implementation principle of Example 1 is as follows: The output shaft of the motor 2 drives the drive gear 61 to rotate. The drive gear 61 drives the driven gear 62 to rotate through the gear set 63. The driven gear 62 drives the screw 5 to rotate. Under the guiding action of the slider 7 and the outer tube 3, the slider 7 will drive the telescopic tube 8 to slide along the axis of the screw 5. During the transmission process of the gear set 63, the gear set 63 reduces the speed of the driven gear 62, so that the screw 5 has a greater torque force during rotation, thus giving the electric push rod a greater thrust effect.

[0041] In three-dimensional space, when the axes of two shafts on different structures are not in a skew relationship, the installer only needs to install the end post 9 on one of the shafts first, and then, according to the position of the other shaft, rotate the bottom post 10 to drive the rotating disk 121 to rotate synchronously, so that the axis of the mounting shaft hole 11 on the bottom post 10 can coincide with the axis of the shaft.

[0042] Then, the shaft is inserted into the mounting shaft hole 11 on the base column 10. Finally, the worker tightens the fastening nut 122 to fix the base column 10 to the base shell 4. During this process, the diameter of the shaft can be made closer to the inner diameter of the mounting shaft hole 11, which helps to improve the accuracy of the push structure stroke of the electric push rod, while greatly reducing the installation accuracy. Example

[0043] refer to Figure 3The difference between this embodiment and embodiment 1 is that: the shaft assembly 12 includes a solid hemisphere 123 arranged on the outside of the bottom shell 4, the rotation axis of the solid hemisphere 123 coincides with the axis of the screw 5, a hollow hemisphere 124 is integrally formed on the bottom column 10, the inner spherical surface of the hollow hemisphere 124 is used to abut and slide with the outer spherical surface of the solid hemisphere 123, and the contact surfaces of the solid hemisphere 123 and the solid hemisphere 124 are both roughened.

[0044] Reference Figure 3 A limiting ring 125 is bolted to the bottom shell 4. The inner diameter of the limiting ring 125 is larger than the diameter of the bottom post 10. The inner sidewall of the limiting ring 125 is used to abut against and slide against the outer spherical surface of the hollow hemisphere 124. A positioning element 126 for fixing the bottom post 10 is arranged on the bottom shell 4.

[0045] In three-dimensional space, when the axes of two shafts on different structures are in a non-planar relationship, the installer first installs the end post 9 on one of the shafts. Then, according to the position of the other shaft, by rotating the bottom post 10, the hollow hemisphere 124 rotates at any angle around the center of the solid hemisphere 123 and within the ring of the limiting ring 125, so that the axis of the mounting shaft hole 11 on the bottom post 10 can coincide with the axis of the other shaft. Then, the shaft is inserted into the mounting shaft hole 11 on the bottom post 10.

[0046] Reference Figure 3 The positioning component 126 includes a limiting ring 1261 integrally formed on the bottom shell 4. The limiting ring 1261 is sleeved on the restricting ring 125. A positioning bolt 1262 passes through the restricting ring 125 and is bolted to the bottom shell 4.

[0047] Afterwards, tighten the positioning bolt 1262. The positioning bolt 1262 presses the limiting ring 125 onto the bottom shell 4. At this time, the inner ring sidewall of the limiting ring 125 will press against the outer spherical surface of the hollow hemisphere 124. The friction between the limiting ring 125 and the hollow hemisphere 124 increases, thereby preventing the hollow hemisphere 124 from moving, thus achieving the effect of fixing the bottom column 10. This method greatly reduces the difficulty and accuracy of installation.

[0048] The implementation principle of Example 2 is as follows: In three-dimensional space, when the axes of two shafts on different structures are in a non-planar relationship, the installer first installs the end post 9 on one of the shafts, and then, according to the position of the other shaft, by rotating the bottom post 10, the hollow hemisphere 124 rotates around the center of the solid hemisphere 123 and within the ring of the limiting ring 125 at any angle, so that the axis of the mounting shaft hole 11 on the bottom post 10 can coincide with the axis of the other shaft, and then the shaft is inserted into the mounting shaft hole 11 on the bottom post 10.

[0049] Afterwards, tighten the positioning bolt 1262. The positioning bolt 1262 presses the limiting ring 125 onto the bottom shell 4. At this time, the inner ring sidewall of the limiting ring 125 will press against the outer spherical surface of the hollow hemisphere 124. The friction between the limiting ring 125 and the hollow hemisphere 124 increases, thereby preventing the hollow hemisphere 124 from moving, thus achieving the effect of fixing the bottom column 10. This method greatly reduces the difficulty and accuracy of installation. Example

[0050] refer to Figure 4 The difference between this embodiment and embodiment 2 is that the solid hemisphere 123 and the bottom shell 4 are arranged separately, and the solid hemisphere 123 is provided with countersunk bolts 17, which are bolted to the bottom shell 4.

[0051] The implementation principle of Example 3 is as follows: the separate design of the solid hemisphere 123 and the bottom shell 4 can reduce the difficulty of integrally machining the solid hemisphere 123 on the bottom shell 4, which is conducive to reducing the production cost of the bottom shell 4.

[0052] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An electric actuator for an adaptive installation station, characterized in that: The system includes a base (1), on which a motor (2), an outer tube (3), and a bottom shell (4) are mounted. A screw (5) is rotatably mounted on the base (1). A torque transmission element (6) is provided between the output shaft of the motor (2) and the screw (5). A polygonal slider (7) is threaded onto the screw (5). A telescopic tube (8) is mounted on the slider (7). The telescopic tube (8) is coaxially sleeved on the screw (5). The outer tube (3) is coaxially sleeved on the telescopic tube (8). On the slide, the slider (7) and the outer tube (3) are slidably engaged. The telescopic tube (8) is coaxially provided with an end post (9) at one end facing away from the slider (7). A bottom post (10) is arranged on the bottom shell (4). Both the end post (9) and the bottom post (10) are provided with mounting shaft holes (11). A shaft fitting assembly (12) is provided between the bottom post (10) and the bottom shell (4). The shaft fitting assembly (12) is used to change and fix the angle between the axis of the bottom post (10) and the axis of the screw (5). The adaptive assembly (12) includes a rotating disk (121) coaxially disposed on the bottom post (10), the bottom post (10) rotatably passes through the side wall of the bottom shell (4), the rotating disk (121) is located inside the bottom shell (4), the rotating disk (121) is coaxially arranged with the screw (5), and a fastening nut (122) is bolted to the bottom post (10) on the outside of the bottom shell (4); The adaptive assembly (12) includes a solid hemisphere (123) arranged on the outside of the bottom shell (4), the rotation axis of the solid hemisphere (123) coincides with the axis of the screw (5), a hollow hemisphere (124) is provided on the bottom column (10), the inner spherical surface of the hollow hemisphere (124) is used to abut and slide with the outer spherical surface of the solid hemisphere (123), a limiting ring (125) is detachably provided on the bottom shell (4), the inner ring diameter of the limiting ring (125) is larger than the diameter of the bottom column (10), the inner ring sidewall of the limiting ring (125) is used to abut and slide with the outer spherical surface of the hollow hemisphere (124), and a positioning member (126) for fixing the bottom column (10) is provided on the bottom shell (4).

2. The electric push rod for an adaptive installation station according to claim 1, characterized in that: The torque component (6) includes a drive gear (61) disposed on the output shaft of the motor (2), a driven gear (62) disposed on the screw (5), and a gear set (63) rotatably disposed on the base (1) between the drive gear (61) and the driven gear (62), and both the drive gear (61) and the driven gear (62) mesh with the gear set (63).

3. The electric push rod for an adaptive installation station according to claim 2, characterized in that: The screw (5) has an inner end ring (13) coaxially arranged at the end opposite to the driven gear (62), and the outer circumferential wall of the inner end ring (13) is attached to the inner circumferential wall of the telescopic tube (8). The outer tube (3) has an outer end ring (14) coaxially arranged at the end opposite to the base (1), and the inner circumferential wall of the outer end ring (14) is attached to the outer circumferential wall of the telescopic tube (8).

4. The electric push rod for an adaptive installation station according to claim 3, characterized in that: The outer tube (3) is coaxially provided with a sealing ring (15) at one end facing away from the base (1). The outer end ring (14) is located between the sealing ring (15) and the outer tube (3). A sealing ring (16) is provided on the sealing ring (15), and the sealing ring (16) abuts against the circumferential outer wall of the telescopic tube (8).

5. The electric push rod for an adaptive installation station according to claim 1, characterized in that: The positioning component (126) includes a limiting ring (1261) disposed on the bottom shell (4), the limiting ring (1261) being sleeved on the restricting ring (125), and a positioning bolt (1262) being threaded through the restricting ring (125), the positioning bolt (1262) being bolted to the bottom shell (4).

6. The electric push rod for an adaptive installation station according to claim 5, characterized in that: A countersunk bolt (17) is threaded through the solid hemisphere (123), and the countersunk bolt (17) is bolted to the bottom shell (4).

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