Dimension adjusting device of electric push rod

Abstract

The utility model discloses a size adjusting device of an electric push rod, which is used for adjusting the extension length size of the electric push rod and comprises a base, a base plate and a base plate, the first fixing plate and the second fixing plate are detachably fixed on the base respectively, the first fixing plate and the second fixing plate are arranged in parallel, the first fixing plate is provided with a first limiting block used for limiting the extension length of the electric push rod, and the second fixing plate is provided with a second limiting block used for installing the electric push rod; the microswitch is arranged on the first limiting block and used for being matched with the electric push rod to provide switching signals for controlling the electric push rod to be powered on and powered off.

Description

Technical Field

[0001] This utility model relates to motion mechanisms, and more particularly to a size adjustment device for an electric push rod. Background Technology

[0002] Range hoods have become an indispensable kitchen appliance in modern homes. They operate on the principles of fluid dynamics, using a centrifugal fan inside to draw in and exhaust cooking fumes, and a filter to remove some of the grease particles.

[0003] Range hoods typically contain moving parts, such as the smoke baffle in a side-draft range hood, which can flip or slide to improve smoke collection; the smoke guide plate in a top-draft range hood, which can rise, fall, or flip to change the position of the negative pressure zone and improve smoke extraction; or other components such as filters and smoke collection hoods. Motion mechanisms are needed to drive these moving parts, and these mechanisms play an increasingly important role, directly affecting product performance, efficiency, user experience, and overall reliability. Among these, the push rod is one of the most widely used moving parts in range hoods, as disclosed in Chinese patent applications 202223386912.6, 202310675188.9, and 202223343798.9.

[0004] In the production process of range hoods, the appropriateness of the extension length of the push rod inner tube is one of the most crucial factors affecting production efficiency. Currently, the main methods for adjusting the extension length of the push rod inner tube are as follows:

[0005] 1) Fix one end of the push rod and make a limit block at the corresponding extension size. When energized, the inner tube of the push rod extends and hits the limit block, thereby adjusting the extension size of the inner tube of the push rod. The main disadvantage of this solution is that the limit at both ends can easily cause the push rod to hit the limit block when it extends to the corresponding size, making it very difficult and inconvenient to remove the push rod, and it is also easy to damage the push rod.

[0006] 2) Using a control panel, the push rod is energized and operated for a certain period of time to reach the appropriate extension position. The main drawback of this method is that the extension speed of the inner tube of push rods varies slightly between different production batches. If the same time period is specified, the extension size of the inner tube of each push rod will be different, thus affecting the actual production efficiency.

[0007] 3) Using microswitches, such as those in patents with application numbers 201320111190.5 and 202221909876.4, a slot is set inside the push rod guide tube, and an adjustable microswitch is set on the slot. Because the adjustable microswitches are set at both ends of the guide tube, and the screw has a push-pull mechanism with limit blocks, the maximum stroke of the motor push rod device can be easily adjusted. Although this solution allows for free adjustment of the push rod stroke, it requires installation on each electric push rod, which is inconvenient in the actual production and assembly of range hoods, has a high cost, and low adjustment accuracy, thus not meeting the requirements.

[0008] Therefore, further improvements are needed. Utility Model Content

[0009] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a size adjustment device for an electric push rod, which can conveniently adjust the size of the push rod before it leaves the factory, has high adaptability, and is suitable for the actual production of range hoods.

[0010] The technical solution adopted by this utility model to solve the above-mentioned technical problem is: a size adjustment device for an electric push rod, used to adjust the extension length of the electric push rod, characterized in that:

[0011] The regulating device includes:

[0012] Base;

[0013] A first fixing plate and a second fixing plate are detachably fixed to the base, arranged side by side. The first fixing plate is provided with a first limiting block for limiting the extension length of the electric push rod, and the second fixing plate is provided with a second limiting block for mounting the electric push rod.

[0014] A micro switch, located on the first limit block, is used to cooperate with the electric actuator to provide a switching signal to control the electric actuator's power supply.

[0015] By setting a first fixing plate and a second fixing plate that are detachably fixed to the base, the distance between the two fixing plates can be freely adjusted, which also allows for free adjustment of the extension length of the electric push rod. This facilitates convenient size adjustment of the electric push rod before it leaves the factory. Furthermore, the first and second fixing plates can be replaced with different styles to accommodate different styles of electric push rods, resulting in high adaptability and a wide range of applications. In addition, a micro switch is provided to prevent the electric push rod from jamming with the first limit block, making it easy to remove the electric push rod from the adjustment device after adjustment and improving production efficiency.

[0016] Furthermore, a first motor is mounted on the bottom surface of the second fixed plate, and a lead screw is driven to the output end of the first motor. A connecting piece is fixedly mounted on the bottom surface of the first fixed plate, and the connecting piece is threadedly connected to the lead screw. By cooperating with the motor, lead screw, and connecting piece, the initial position of the first fixed plate can be adjusted, allowing for precise adjustment of the position of the first fixed plate, thereby precisely adjusting the extension length of the electric push rod.

[0017] To facilitate the threaded connection between the connector and the lead screw, the connector is block-shaped, and a first nut is fixed inside the connector. The first nut is sleeved on the outer circumference of the lead screw and threadedly connected to the lead screw.

[0018] To facilitate the fixing and separation of the first fixing plate and the base, both the first fixing plate and the second fixing plate are detachably fixed to the base by the second nut.

[0019] Furthermore, to facilitate keeping the push rod of the electric linear actuator horizontal, the electric linear actuator includes a second motor, a push rod, and a housing. The push rod is telescopic relative to the housing. The housing is mounted on a second limiting block away from the tail portion through which the push rod protrudes. The axis of the push rod is parallel to the axis of the lead screw.

[0020] The second limiting block is located on the side of the second fixing plate away from the first fixing plate. A pillow block is provided on the upper surface of the side of the second fixing plate adjacent to the first fixing plate. The pillow block is used to support the head of the outer shell through which the push rod passes.

[0021] To facilitate the cooperation between the electric push rod and the micro switch, a lever is provided on the contact of the micro switch, and the lever is closely attached to the side of the first limiting block facing the second limiting block.

[0022] Compared with the prior art, the advantages of this utility model are as follows: By setting a first fixing plate and a second fixing plate that are detachably fixed to the base, the distance between the two fixing plates can be freely adjusted, which also allows for free adjustment of the extension length of the electric push rod. This facilitates convenient size adjustment of the electric push rod before it leaves the factory. Moreover, the first and second fixing plates can be replaced with different styles to adapt to different styles of electric push rods, resulting in high adaptability and a wide range of applications. Furthermore, a micro switch is provided to prevent the electric push rod from jamming with the first limit block, making it easy to remove the electric push rod from the adjustment device after adjustment and improving production efficiency. The initial position of the first fixing plate can be adjusted precisely through the cooperation of the motor, lead screw, and connecting parts, thereby precisely adjusting the extension length of the electric push rod. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the adjustment device according to an embodiment of the present invention (viewed from top to bottom);

[0024] Figure 2 This is a schematic diagram of the adjustment device according to an embodiment of the present invention (viewed from bottom to top);

[0025] Figure 3 This is an exploded view of the adjusting device according to an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the adjustment state of the adjustment device according to an embodiment of the present invention. Detailed Implementation

[0027] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions.

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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. Since the embodiments disclosed in this utility model can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0029] See Figures 1-4 An electric push rod size adjustment device includes a first fixed plate 11, a second fixed plate 12, a first limiting block 21, a second limiting block 22, a pillow block 3, and a base 4.

[0030] A first fixing plate 11 and a second fixing plate 12 are arranged side by side. A first motor 51 is mounted on the bottom surface of the second fixing plate 12. A lead screw 52 is driven and connected to the output end of the first motor 51. A connector 53 is fixedly mounted on the bottom surface of the first fixing plate 11. The connector 53 may be block-shaped, and a first nut 54 is fixed inside it. The first nut 54 is sleeved on the outer circumference of the lead screw 52 and threadedly connected to the lead screw 52. Thus, when the first motor 51 drives the lead screw 52 to rotate, the connector 53 can move linearly along the axial direction of the lead screw 52, ​​thereby driving the first fixing plate 11 to move linearly, so as to control the extension length adjustment position of the electric push rod 100.

[0031] Both the first fixing plate 11 and the second fixing plate 12 are detachably fixed to the base 4, for example, by means of a second nut 13. As described above, the first fixing plate 11 needs to be adjusted in position according to the extension length of the electric push rod 100. Therefore, when its position needs to be adjusted (for the same model or in cases where the extension length requirement is the same, no adjustment is required), the second nut 13 fixing the first fixing plate 11 is removed, and after the first fixing plate 11 is moved into place, it is then fixed to the base 4 with the second nut 13. Optionally, the position of the first fixing plate 11 can be adjusted manually after removing the second nut 13. However, in this embodiment, it is preferred to use the first motor 51, lead screw 52, ​​and connecting piece 53 to adjust the position of the first fixing plate 11, which can greatly improve the adjustment accuracy.

[0032] The base 4 can be made of aluminum profile, while the two fixing plates can be made of stainless steel. Since the first fixing plate 11 and the second fixing plate 12 are fixed by the second nut 13 respectively, the first fixing plate 11 and the second fixing plate 12 can be disassembled relative to the base 4, thereby allowing for the replacement of different styles to accommodate different electric push rods 100.

[0033] The first limiting block 21 is fixedly disposed on the upper surface of the first fixing plate 11, and the second limiting block 22 is fixedly disposed on the upper surface of the second fixing plate 12. A micro switch 6 is disposed on the first limiting block 21, and the micro switch 6 is a normally closed switch.

[0034] The electric linear actuator 100 includes a second motor 101, a actuator 102, and a housing 103. The actuator 102 is telescopic relative to the housing 103; that is, a portion of the housing 103 corresponds to the outer tube of the actuator. The second motor 101 is mounted on the housing 103, and the portion of the housing 103 away from the protruding end of the actuator 102 is mounted on a second limiting block 22. The axis X1 of the actuator 102 is parallel to the axis X2 of the lead screw 52, ​​thus the telescopic direction of the actuator 102 is consistent with the axial direction of the lead screw 52. Preferably, the axis X1 of the actuator 102 and the axis X2 of the lead screw 52 are located in the same vertical plane. To allow the push rod 102 to have a certain adjustment range, the second limiting block 22 is usually far from the first fixing plate 11, as shown in the figure, and is set on the side of the second fixing plate 12 away from the first fixing plate 11. This may cause the housing 103 and the push rod 102 to sink at the end that is far from the housing 103. In order to allow the push rod 102 to extend horizontally, a pillow block 3 can be set on the upper surface of the side of the second fixing plate 12 adjacent to the first fixing plate 11 to support the head of the housing 103 through which the push rod 102 passes.

[0035] Since the contacts of the micro switch 6 are typically small, a lever 61 can be provided on the contacts of the micro switch 6. The lever 61 can be positioned close to the side of the first limiting block 21 facing the second limiting block 22. Thus, when the push rod 102 extends to its full position, the micro switch 6 can be triggered by pressing the lever 61, which has a larger contact area, thereby disconnecting the power supply to the electric push rod 100. This prevents the push rod 102 from blocking the first limiting block 21, making it easier to remove the electric push rod 100 after the size adjustment is completed.

[0036] If the adjusted length needs to be changed, the first motor 51 drives the lead screw 52 to rotate, which in turn pushes the first fixed plate 11 to move according to the required translation length.

[0037] The electric linear actuator size adjustment device of this utility model is mainly used for adjusting the extension length of the electric linear actuator before it leaves the factory. It is easy to adjust, has high adjustment accuracy, the whole device has high adaptability, and the electric linear actuator is easy to pick up after adjustment.

Claims

1. A size adjustment device for an electric linear actuator, used to adjust the extension length of an electric linear actuator (100), characterized in that: The regulating device includes: Base (4); A first fixing plate (11) and a second fixing plate (12) are detachably fixed to the base (4). The first fixing plate (11) and the second fixing plate (12) are arranged side by side. The first fixing plate (11) is provided with a first limiting block (21) for limiting the extension length of the electric push rod (100), and the second fixing plate (12) is provided with a second limiting block (22) for mounting the electric push rod (100). A micro switch (6) is provided on the first limit block (21) to cooperate with the electric push rod (100) to provide a switching signal to control the electric push rod (100) to be powered on or off.

2. The size adjustment device for the electric linear actuator according to claim 1, characterized in that: The bottom surface of the second fixing plate (12) is provided with a first motor (51), and the output end of the first motor (51) is connected to a lead screw (52). The bottom surface of the first fixing plate (11) is fixedly provided with a connector (53), and the connector (53) and the lead screw (52) are threadedly connected.

3. The size adjustment device for the electric linear actuator according to claim 2, characterized in that: The connector (53) is block-shaped, and a first nut (54) is fixed inside the connector (53). The first nut (54) is sleeved on the outer periphery of the lead screw (52) and threadedly connected to the lead screw (52).

4. The size adjustment device for the electric linear actuator according to claim 1, characterized in that: The first fixing plate (11) and the second fixing plate (12) are both detachably fixed to the base (4) by the second nut (13).

5. The size adjustment device for the electric linear actuator according to claim 1, characterized in that: The electric push rod (100) includes a second motor (101), a push rod (102), and a housing (103). The push rod (102) is telescopic relative to the housing (103). The housing (103) is mounted on a second limiting block (22) away from the tail end through which the push rod (102) passes. The axis of the push rod (102) is parallel to the axis of the lead screw (52). The second limiting block (22) is located on the side of the second fixing plate (12) away from the first fixing plate (11). The upper surface of the second fixing plate (12) adjacent to the first fixing plate (11) is provided with a pillow block (3). The pillow block (3) is used to support the head of the outer shell (103) through which the push rod (102) passes.

6. The size adjustment device for the electric linear actuator according to claim 1, characterized in that: The micro switch (6) has a lever (61) on its contact point, and the lever (61) is attached to the side of the first limiting block (21) facing the second limiting block (22).

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