An electric push rod device

Abstract

The utility model discloses an electric push rod device, include: motor unit, fixed structure, fixed structure includes the casing, and motor unit is along the first direction setting, transmission assembly, transmission assembly includes the gear and rack that intermeshes, and rack is along the second direction setting, be provided with the opening for rack passing on the casing, and motor unit drives gear rotation to drive rack relative casing linear motion along the second direction, thereby rack promotes the door body to do the door opening action, the utility model discloses motor unit along the first direction setting, and motor unit drives gear rotation to drive rack relative casing linear motion along the second direction, thereby rack promotes the door body to do the door opening action, therefore the utility model discloses can be installed on the box of electric appliance to assist the door body to open to realize electric appliance handleless door, the utility model discloses adopts the gear and rack to realize transmission to thereby transmission assembly is relatively flat, and the installation is convenient.

Description

Technical Field

[0001] This utility model belongs to the field of electric linear actuator technology, and specifically relates to an electric linear actuator device. Background Technology

[0002] An electric linear actuator is a mechanical device that converts the rotary motion of a motor into linear motion. It is widely used in various mechanical equipment that requires pushing or pulling motion.

[0003] Electric linear actuators in related technologies mostly use worm gear transmission. Worm gear transmission occupies a large space and has high requirements for installation space. In addition, worm gear transmission has problems such as easy wear of the transmission structure, limited load capacity, and high operating noise. Utility Model Content

[0004] In order to overcome at least one of the defects of the prior art, the present invention provides an electric push rod device. The present invention can be installed on the cabinet of an appliance to assist in opening the door, so as to realize the appliance opening without a handle. Furthermore, the transmission component of the present invention is relatively flat, which facilitates installation.

[0005] The technical solution adopted by this utility model to solve its problem is: An electric linear actuator includes: Motor assembly; A fixed structure, comprising a housing, with a motor assembly disposed inside the housing and the motor assembly positioned along a first direction; The transmission assembly includes a meshing gear and a rack. The gear is located inside the housing and is connected to the output shaft of the motor assembly. The rack is located inside the housing and is arranged along a second direction. The housing has an opening for the rack to pass through. The motor assembly drives the gear to rotate, which in turn drives the rack to move linearly relative to the housing in a second direction, thereby pushing the door to open.

[0006] In a preferred embodiment, the gear extends along a third direction, which is the Z-axis direction of the coordinate system. The height of the gear and rack in the third direction is H, and the value of H ranges from 15mm to 30mm.

[0007] In a preferred embodiment, the transmission assembly further includes a first bearing and a second bearing, both of which are sleeved on the output shaft of the motor assembly; The housing has a first mounting slot for installing the first bearing and a second mounting slot for installing the second bearing.

[0008] In one preferred embodiment, the electric linear actuator includes a buffer structure, which includes a first buffer and a second buffer, wherein the first buffer is disposed between the motor and the housing. The second buffer is a block-shaped flexible pad, and the front end of the rack is provided with a third mounting groove. One end of the second buffer is inserted into the third mounting groove.

[0009] In a preferred embodiment, the fixing structure also includes a motor mounting bracket, which is disposed inside the housing and sleeved on the outside of the motor assembly to support the motor assembly. The motor mounting bracket is located near the transmission connection position between the motor assembly and the gear. The first buffer is an annular flexible pad. The first buffer is sleeved on the outside of the motor mounting bracket, and the inner sidewall of the first buffer abuts against the outer sidewall of the motor mounting bracket, while the outer sidewall of the first buffer abuts against the inner sidewall of the housing.

[0010] In a preferred embodiment, the electric linear actuator further includes a control structure, which includes a PCB control chip and a Hall sensor. The PCB control chip, the Hall sensor, and the motor assembly are electrically connected, and a magnet corresponding to the Hall sensor is provided on the rack.

[0011] In a preferred embodiment, the PCB control chip is positioned at the angle between the motor assembly and the rack; The housing has a first mounting space, a second mounting space and a third mounting space inside. The motor assembly is located in the first mounting space, the rack is located in the second mounting space, and the PCB control chip is located in the third mounting space. The housing is provided with a reinforcing member at the position of the third mounting space.

[0012] In a preferred embodiment, the reinforcing member includes a first reinforcing part, a second reinforcing part, and a third reinforcing part that are interconnected. Multiple first reinforcing parts extend along a first direction, multiple second reinforcing parts extend along a second direction, and multiple third reinforcing parts extend along a third direction. At least two third reinforcing parts converge at the junction of the first and second reinforcing parts, and the outer diameter of the third reinforcing parts gradually decreases along the third direction.

[0013] In one preferred embodiment, the motor assembly includes a motor and a reduction gear mechanism, which are connected in a transmission manner.

[0014] In one preferred embodiment, the housing includes an interlocking top cover and a base.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The motor assembly in this utility model is arranged along the first direction. The motor assembly drives the gear to rotate, thereby driving the rack to move linearly relative to the housing along the second direction. As a result, the rack pushes the door to open. Therefore, this utility model can be installed on the appliance's housing to assist the door in opening, so as to realize the appliance's handle-less opening.

[0016] 2. This utility model uses gears and racks to achieve transmission, so the transmission components are relatively flat and easy to install. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0019] Figure 2 This is an embodiment of the present utility model. Figure 1 A schematic diagram of its decomposed structure.

[0020] Figure 3 This is an embodiment of the present utility model. Figure 2 A schematic diagram of its decomposed structure.

[0021] Figure 4 This is a schematic diagram of the transmission component in an embodiment of the present invention.

[0022] Figure 5 This is a first-view structural schematic diagram of the usage state in an embodiment of this utility model.

[0023] Figure 6 This is a second-view structural schematic diagram of the usage state in an embodiment of this utility model.

[0024] Explanation of key figure labels: 10. Motor assembly; 101. Motor; 102. Reduction mechanism; 20. Fixing structure; 201. Housing; 2011. Opening; 2012. First mounting slot; 2013. Second mounting slot; 2014. First mounting space; 2015. Second mounting space; 2016. Third mounting space; 2017. Top cover; 2018. Base; 202. Motor mounting bracket; 203. Reinforcing member; 2031. First reinforcing part; 2032. Second reinforcing part; 2033. Third reinforcing part; 30. Transmission assembly. Components, 301, Gear, 3011, First Gear Section, 3012, Second Gear Section, 302, Rack, 3021, First Rack Section, 3022, Second Rack Section, 3023, Third Mounting Slot, 303, First Bearing, 304, Second Bearing, 40, Buffer Structure, 401, First Buffer Component, 402, Second Buffer Component, 50, Control Structure, 501, PCB Control Chip, 502, Magnet, 60, Electrical Appliances, 601, Housing, 602, Door, 603, Bubble Layer, 70, Other Equipment. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0027] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0028] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0029] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0030] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0031] See Figures 1 to 6 This utility model discloses an electric push rod device, including: a motor assembly 10; a fixed structure 20, the fixed structure 20 including a housing 201, the motor assembly 10 being disposed inside the housing 201 and arranged along a first direction; a transmission assembly 30, the transmission assembly 30 including a meshing gear 301 and a rack 302, the gear 301 being disposed inside the housing 201 and being connected to the output shaft of the motor assembly 10, the rack 302 being disposed inside the housing 201 and arranged along a second direction; the housing 201 is provided with an opening 2011 for the rack 302 to pass through, the motor assembly 10 drives the gear 301 to rotate so that the rack 302 moves linearly relative to the housing 201 along the second direction, thereby the rack 302 pushes the door 602 to open.

[0032] In this invention, the motor assembly 10 is arranged along the first direction. The motor assembly 10 drives the gear 301 to rotate, which in turn drives the rack 302 to move linearly relative to the housing 201 along the second direction. As a result, the rack 302 pushes the door 602 to open. Therefore, this invention can be installed on the housing 601 of the electrical appliance 60 to assist the electrical appliance 60 in opening the door, so as to realize that the electrical appliance 60 can open the door without a handle. Furthermore, this invention uses the gear 301 and the rack 302 to achieve transmission, so the transmission assembly 30 is relatively flat and easy to install.

[0033] In this embodiment of the utility model, the gear 301 extends along a third direction, which is the Z-axis direction of the coordinate system. The height of the gear 301 and the rack 302 in the third direction is H, and the value of H ranges from 15mm to 30mm.

[0034] For example, see Figures 1 to 3 The first direction is the X-axis direction of the coordinate system, and the second direction is the Y-axis direction of the coordinate system.

[0035] Of course, in other embodiments, the first direction is the Y-axis direction of the coordinate system, and the second direction is the X-axis direction of the coordinate system.

[0036] For example, gear 301 includes a first gear portion 3011 and a second gear portion 3012, and rack 302 includes a first rack portion 3021 and a second rack portion 3022. The first gear portion 3011, the second gear portion 3012, the first rack portion 3021, and the second rack portion 3022 are all made of POM engineering plastic. Since POM engineering plastic has a high internal damping coefficient, it can absorb the vibration energy generated when gear 301 and rack 302 mesh, reducing vibration transmission. POM engineering plastic has self-lubricating properties, which reduces frictional noise when gear 301 and rack 302 mesh. The elastic modulus of POM engineering plastic is much lower than that of metal. When gear 301 meshes, it can buffer the impact force through its own slight elastic deformation, avoiding noise generated by rigid collision.

[0037] When gear 301 meshes with rack 302, the first gear part 3011 meshes with the first rack part 3021, and the second gear part 3012 meshes with the second rack part 3022, forming a double mesh. If one of the first gear part 3011 or the second gear part 3012 is accidentally damaged, the other of the first gear part 3011 or the second gear part 3012 can still maintain movement for a period of time, thus improving the reliability of movement.

[0038] In this embodiment of the utility model, the transmission assembly 30 further includes a first bearing 303 and a second bearing 304, both of which are sleeved on the output shaft of the motor assembly 10; the housing 201 is provided with a first mounting groove 2012 for mounting the first bearing 303 and a second mounting groove 2013 for mounting the second bearing 304.

[0039] For example, both the first bearing 303 and the second bearing 304 can be ball bearings, with the balls installed between the inner and outer steel rings, allowing the inner and outer steel rings to rotate relative to each other.

[0040] Since the first bearing 303 and the second bearing 304 are respectively provided on both sides of the gear 301, the first bearing 303 and the second bearing 304 support the two sides of the gear 301, thereby improving the installation stability, load capacity and coaxiality of the gear 301.

[0041] In this embodiment of the utility model, the electric push rod device further includes a buffer structure 40, which includes a first buffer 401 and a second buffer 402. The first buffer 401 is disposed between the motor 101 and the housing 201. The second buffer 402 is a block-shaped flexible pad. A third mounting groove 3023 is provided at the front end of the rack 302, and one end of the second buffer 402 is inserted into the interior of the third mounting groove 3023.

[0042] For example, the block-shaped flexible pad is a block-shaped silicone pad or a block-shaped rubber pad. The rack 302 moves linearly under the drive of the gear 301. When the front end of the rack 302 pushes the target object through linear motion, the second buffer 402 is provided at the front end of the rack 302, which can reduce the impact when the rack 302 pushes the target object.

[0043] In this embodiment of the utility model, the fixing structure 20 further includes a motor fixing bracket 202, which is disposed inside the housing 201. The motor fixing bracket 202 is sleeved on the outside of the motor assembly 10 to support the motor assembly 10, and the motor fixing bracket 202 is disposed near the transmission connection position between the motor assembly 10 and the gear 301. The first buffer 401 is an annular flexible pad, which is sleeved on the outside of the motor fixing bracket 202. The inner sidewall of the first buffer 401 abuts against the outer sidewall of the motor fixing bracket 202, and the outer sidewall of the first buffer 401 abuts against the inner sidewall of the housing 201.

[0044] For example, the annular flexible pad is an annular silicone pad or an annular rubber pad. The first buffer 401 buffers and reduces vibration around the motor mounting bracket 202, preventing the motor assembly 10 from transmitting vibration to the housing 201 during operation and causing resonance in the housing 201. Thus, the first buffer 401 can reduce the operating vibration of the motor assembly 10.

[0045] Furthermore, the motor mounting bracket 202 is positioned close to the transmission connection between the motor assembly 10 and the gear 301. One end of the first buffer 401 extends toward the motor assembly 10, and the other end extends toward the gear 301. In other words, the first buffer 401 is positioned close to the transmission connection between the motor assembly 10 and the gear 301, thereby reducing the transmission noise of the gear 301 to a certain extent.

[0046] In this embodiment of the utility model, the electric push rod device further includes a control structure 50, which includes a PCB control chip 501 and a Hall sensor. The PCB control chip 501, the Hall sensor and the motor assembly 10 are electrically connected. A magnet 502 corresponding to the Hall sensor is provided on the rack 302.

[0047] It should be noted that the magnet 502 can generate a magnetic field. The Hall sensor is set on the surface of the PCB control chip 501 or on the inner wall of the housing 201. The Hall sensor can be a linear Hall sensor. When the magnet 502 moves with the rack 302, the Hall sensor can output a voltage proportional to the magnetic field strength. The voltage signal output by the Hall sensor is transmitted to the PCB control chip 501 for processing, so as to further control the motor assembly 10.

[0048] In this embodiment of the utility model, the PCB control chip 501 is disposed at the angle between the motor assembly 10 and the rack 302; the housing 201 has a first mounting space 2014, a second mounting space 2015 and a third mounting space 2016 inside, the motor assembly 10 is disposed in the first mounting space 2014, the rack 302 is disposed in the second mounting space 2015, the PCB control chip 501 is disposed in the third mounting space 2016, and the housing 201 is provided with a reinforcing member 203 at the position of the third mounting space 2016.

[0049] Since the PCB control chip 501 is a sheet or plate structure, and the PCB control chip 501 is set in the third mounting space 2016, the housing 201 forms a thin plate structure at the position of the third mounting space 2016. The reinforcement 203 set at the position of the thin plate can not only strengthen the thin plate structure, but also reduce the resonance of the noise generated by the operation of the motor assembly 10 and / or the transmission assembly 30 at the position of the thin plate structure.

[0050] Therefore, the motor assembly 10, transmission assembly 30, buffer structure 40 and control structure 50 of this utility model are easy to modularly install and have high installation efficiency.

[0051] In this embodiment of the present invention, the reinforcing member 203 includes a first reinforcing part 2031, a second reinforcing part 2032 and a third reinforcing part 2033 that are interconnected; a plurality of first reinforcing parts 2031 extend along a first direction, a plurality of second reinforcing parts 2032 extend along a second direction, and a plurality of third reinforcing parts 2033 extend along a third direction. At least two third reinforcing parts 2033 are provided at the junction of the first reinforcing part 2031 and the second reinforcing part 2032, and the outer diameter of the third reinforcing part 2033 gradually decreases along the third direction.

[0052] For example, see Figure 1 as well as Figure 3 The first reinforcing part 2031 and the second reinforcing part 2032 are both elongated reinforcing ribs, and the third reinforcing part 2033 is a triangular reinforcing rib. At least two third reinforcing parts 2033 converge at the junction of the first reinforcing part 2031 and the second reinforcing part 2032 to form a conical protrusion with an outer diameter that gradually decreases along the third direction.

[0053] In this embodiment of the utility model, the motor assembly 10 includes a motor 101 and a reduction mechanism 102, and the motor 101 and the reduction mechanism 102 are connected in a transmission manner.

[0054] It should be noted that motor 101 can be a DC motor or an AC motor, and the specific type of motor 101 can be selected according to the actual situation.

[0055] The output shaft of motor 101 is connected to gear 301 via a conventional coupling; or the output shaft of motor 101 is a polygonal shaft, and gear 301 has a polygonal hole inside, with the output shaft of motor 101 inserted into the inside of gear 301 to drive gear 301 to rotate.

[0056] In this embodiment of the utility model, the housing 201 includes an upper cover 2017 and a base 2018 that are spliced ​​together.

[0057] Specifically, the upper cover 2017 and the base 2018 are made separately, which facilitates the installation of components such as the motor assembly 10, the transmission assembly 30, the buffer structure 40, and the control structure 50. After the installation of the above structures is completed, the upper cover 2017 and the base 2018 are locked together with screws.

[0058] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. An electric linear actuator, characterized in that, include: Motor assembly; A fixed structure, the fixed structure including a housing, the motor assembly disposed inside the housing, the motor assembly being disposed along a first direction; A transmission assembly, comprising a meshing gear and a rack, wherein the gear is disposed inside the housing and is drively connected to the output shaft of the motor assembly, and the rack is disposed inside the housing and is arranged along a second direction; The housing is provided with an opening for the rack to pass through. The motor assembly drives the gear to rotate, thereby causing the rack to move linearly relative to the housing in a second direction, so that the rack pushes the door to open.

2. The electric linear actuator according to claim 1, characterized in that: The gear extends along a third direction, which is the Z-axis direction of the coordinate system. The height of the gear and the rack in the third direction is H, and the value of H ranges from 15mm to 30mm.

3. The electric linear actuator according to claim 1, characterized in that: The transmission assembly also includes a first bearing and a second bearing, both of which are sleeved on the output shaft of the motor assembly. The housing has a first mounting groove for mounting the first bearing and a second mounting groove for mounting the second bearing.

4. The electric linear actuator according to claim 1, characterized in that: The electric actuator includes a buffer structure, which includes a first buffer and a second buffer, wherein the first buffer is disposed between the motor and the housing. The second buffer is a block-shaped flexible pad, and the front end of the rack is provided with a third mounting groove, with one end of the second buffer inserted into the third mounting groove.

5. The electric actuator according to claim 4, characterized in that: The fixing structure also includes a motor mounting bracket, which is disposed inside the housing and sleeved on the outside of the motor assembly to support the motor assembly. The motor mounting bracket is located near the transmission connection position between the motor assembly and the gear. The first buffer is an annular flexible pad. The first buffer is sleeved on the outside of the motor mounting bracket, and the inner sidewall of the first buffer abuts against the outer sidewall of the motor mounting bracket, and the outer sidewall of the first buffer abuts against the inner sidewall of the housing.

6. The electric linear actuator according to claim 2, characterized in that: The electric actuator also includes a control structure, which includes a PCB control chip and a Hall sensor. The PCB control chip, the Hall sensor, and the motor assembly are electrically connected. The rack is provided with a magnet corresponding to the Hall sensor.

7. The electric linear actuator according to claim 6, characterized in that: The PCB control chip is located at the angle between the motor assembly and the rack; The housing has a first mounting space, a second mounting space, and a third mounting space inside. The motor assembly is located in the first mounting space, the rack is located in the second mounting space, the PCB control chip is located in the third mounting space, and the housing is provided with a reinforcing member at the position of the third mounting space.

8. The electric linear actuator according to claim 7, characterized in that: The reinforcing member includes a first reinforcing part, a second reinforcing part, and a third reinforcing part that are interconnected. A plurality of first reinforcing portions are provided extending along a first direction, a plurality of second reinforcing portions are provided extending along a second direction, and a plurality of third reinforcing portions are provided extending along a third direction. At least two third reinforcing portions are provided at the junction of the first reinforcing portions and the second reinforcing portions, and the outer diameter of the third reinforcing portions gradually decreases along the third direction.

9. The electric linear actuator according to any one of claims 1-8, characterized in that: The motor assembly includes a motor and a reduction gear mechanism, and the motor and the reduction gear mechanism are connected in a transmission connection.

10. The electric linear actuator according to any one of claims 1-8, characterized in that: The housing includes an upper cover and a base that are joined together.

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