Stroke adjustment structure of the push rod motor

Abstract

This application discloses a stroke adjustment structure for a push rod motor, belonging to the technical field of push rod motors. It mainly includes a base, a housing mounted on one side of the base (the housing has a hollow structure), an adjustment component mounted on one side of the housing, and the adjustment component including a mounting frame fixedly mounted on one side of the housing. A first micro switch is fixed to the lower end of the mounting frame, and a second micro switch is disposed at the upper end of the mounting frame. A first threaded block is mounted on one side of the second micro switch. The stroke adjustment structure of this push rod motor, by setting an adjustable second micro switch and utilizing the threaded connection between a first lead screw and a first threaded block, achieves adjustment of the position of the second micro switch. This allows the user to control the stroke distance of the push rod body, avoiding the problem of difficulty in controlling the movement distance when manually adjusting the slider, and improving the convenience of stroke adjustment.

Description

Technical Field

[0001] This application relates to the field of push rod motor technology, specifically to the stroke adjustment structure of a push rod motor. Background Technology

[0002] A linear actuator motor is a drive device that converts the rotational motion of a motor into linear reciprocating motion through a mechanical structure (such as a lead screw or gear). It features high precision, low noise, and easy control. The motor drives the lead screw to rotate, and the lead screw, in conjunction with a nut, converts the rotational motion into the linear extension and retraction motion of the actuator. By controlling the forward and reverse rotation and the speed of the motor, the stroke and speed of the actuator can be adjusted. It is typically installed on a height-adjustable table to achieve electric height adjustment, meeting the needs of users of different heights, switching between sitting and standing postures, and flexible adjustments to the office environment.

[0003] For example, patent CN223007424U discloses a stroke adjustment structure for a push rod motor, including a housing, a push rod assembly, a first limit switch, a second limit switch, and a triggering component. This utility model can adjust the travel stroke of the push rod in the push rod motor, thereby realizing the position adjustment of the push rod in the retracted and extended positions, significantly improving the flexibility of the push rod motor.

[0004] In the aforementioned patent, when adjusting the first or second limit switch, the locking bolt needs to be loosened manually. Then, the user needs to manually adjust the sliders on the first and second limit switches. The sliders slide in the grooves on the outer casing. When the sliders are manually adjusted to slide in the grooves on the outer casing, it is difficult for the user to control the movement distance of the first and second limit switches. This may result in the adjustment distance being too large or too small during the adjustment process, making it impractical.

[0005] Therefore, it is necessary to provide a stroke adjustment structure for the push rod motor to solve the above problems.

[0006] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0007] Based on the aforementioned problems in the existing technology, the problem to be solved by this application is to provide a stroke adjustment structure for the push rod motor, which solves the problem that when adjusting the limit switch, it is necessary to loosen the bolt and manually adjust the slider, which makes it difficult to control the movement distance, easily leads to improper adjustment, and has low practicality.

[0008] The technical solution adopted by this application to solve its technical problem is: a stroke adjustment structure for a push rod motor, including a base;

[0009] A housing, which is mounted on one side of the base, the housing having a hollow structure;

[0010] An adjustment assembly is installed on one side of the housing. The adjustment assembly includes a mounting frame fixedly installed on one side of the housing. A first micro switch is fixed at the lower end of the mounting frame, and a second micro switch is provided at the upper end of the mounting frame.

[0011] A first threaded block is installed on one side of the second micro switch, and a first lead screw is rotatably installed on one side inside the mounting frame. The first lead screw is threadedly connected to the first threaded block.

[0012] A guide rod is installed on the other side inside the mounting frame, and a guide block is fixed on the other side of the second micro switch. The guide rod and the guide block are slidably connected.

[0013] Furthermore, a transparent plate is fixed to one side of the mounting frame.

[0014] Furthermore, the transparent plate is made of acrylic material, and its surface is provided with scale lines.

[0015] Furthermore, a handle is fixedly installed at the upper end of the first lead screw after passing through the mounting frame.

[0016] Furthermore, a second threaded block is slidably connected inside the housing, and a push rod body is fixed to the upper end of the second threaded block. A second lead screw is rotatably mounted on the base, and the second lead screw is threadedly connected to the second threaded block. A strip groove is opened on one side of the housing, and a contact block is fixed to one side of the second threaded block and can slide inside the strip groove. A drive assembly is provided at the lower end of the base to drive the second lead screw to rotate.

[0017] Furthermore, the drive assembly includes a drive motor fixedly mounted on the other side of the base. The output end of the drive motor passes through the base and is fixed with a first synchronous pulley. The lower end of the second lead screw passes through the base and is fixed with a second synchronous pulley. The outer walls of the first and second synchronous pulleys are fitted with synchronous belts.

[0018] Furthermore, a protective cover is fixedly installed at the lower end of the base.

[0019] The beneficial effects of this application are: the stroke adjustment structure of the push rod motor provided by this application, by setting an adjustable second micro switch and using the threaded connection between the first lead screw and the first threaded block, realizes the adjustment of the position of the second micro switch, so that the user can control the stroke distance of the push rod body, avoiding the problem of difficulty in controlling the movement distance when manually adjusting the slider, and improving the convenience of stroke adjustment.

[0020] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0022] In the attached diagram:

[0023] Figure 1 This is an overall schematic diagram of the stroke adjustment structure of the push rod motor in this application;

[0024] Figure 2 This is a cross-sectional schematic diagram of the stroke adjustment structure of the push rod motor in this application;

[0025] Figure 3 This is a partial overall schematic diagram of the stroke adjustment structure of the push rod motor in this application;

[0026] Figure 4 This is a schematic diagram of the overall adjustment assembly of the stroke adjustment structure of the push rod motor in this application;

[0027] Figure 5 for Figure 3 A magnified structural diagram of A in the diagram.

[0028] The following are the labeling elements in the figure:

[0029] 1. Base; 2. Adjustment assembly; 21. Mounting frame; 22. First micro switch; 23. Second micro switch; 24. First lead screw; 25. Guide rod; 26. First threaded block; 27. Guide block; 28. Transparent plate; 29. ​​Scale line; 210. Handle; 3. Drive assembly; 31. Drive motor; 32. First synchronous pulley; 33. Second synchronous pulley; 34. Synchronous belt; 35. Protective cover; 4. Housing; 5. Second threaded block; 6. Push rod body; 7. Second lead screw; 8. Contact block; 9. Strip groove. Detailed Implementation

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0032] like Figure 1-2 As shown, this application provides a stroke adjustment structure for a push rod motor, including a base 1. The base 1 serves as the basic support component of the entire structure and is typically made of high-strength aluminum alloy to ensure sufficient rigidity and stability when bearing the load of the push rod body 6. A housing 4 is fixed to one side of the upper end of the base 1 by bolts. The housing 4 is designed as a hollow cuboid structure, which not only effectively reduces the overall weight but also provides ample space for the internal transmission components. A second threaded block 5 is provided inside the housing 4, which slides stably within the housing 4. The second threaded block 5 is made of a wear-resistant copper alloy, and the upper end of it is fixed to the push rod body 6 by bolts. The push rod body 6 is also a hollow structure.

[0033] like Figure 2 As shown, a second lead screw 7 is fixedly mounted on the base 1 via a deep groove ball bearing. This lead screw adopts a trapezoidal thread design, which forms a tight fit with the internal thread of the second threaded block 5. When the second lead screw 7 rotates, according to the principle of screw transmission, the second threaded block 5 will move up and down along the axis of the lead screw, thereby driving the push rod body 6 to achieve precise up and down displacement.

[0034] To prevent the second threaded block 5 from rotating during movement, a strip groove 9 is provided on one side of the housing 4. A contact block 8 is fixed to one side of the second threaded block 5 by welding. The contact block 8 is embedded inside the strip groove 9. Under the limiting effect of the strip groove 9, the second threaded block 5 can only move in a straight line along the direction of the strip groove 9.

[0035] like Figure 3 As shown, a drive assembly 3 is provided at the lower end of the base 1, which provides the power source for the movement of the push rod body 6. The drive motor 31 is fixedly installed on the other side of the base 1 by bolts. The output end of the drive motor 31 passes through the base 1 and is fixedly installed with the first synchronous pulley 32 by key connection. The lower end of the second lead screw 7 also passes through the base 1 and is fixedly installed with the second synchronous pulley 33 by the same key connection. Both the first synchronous pulley 32 and the second synchronous pulley 33 are made of high-strength engineering plastic, and their outer walls are fitted with a polyurethane synchronous belt 34.

[0036] A protective cover 35 is fixedly installed at the lower end of the base 1. The protective cover 35 is made of transparent polycarbonate material, which can effectively prevent dust and debris from entering and protect the first synchronous pulley 32, the second synchronous pulley 33 and the synchronous belt 34 from the corrosion of the external environment, and also facilitate the observation of the operating status of the internal transmission components.

[0037] like Figure 4-5As shown, an adjustment assembly 2 is provided on one side of the housing 4. The adjustment assembly 2 includes a mounting frame 21 fixedly installed on one side of the housing 4. The mounting frame 21 is made of aluminum alloy and is tightly connected to the housing 4 by screws. A first micro switch 22 is fixed at the lower end inside the mounting frame 21. This switch is normally closed and serves as a detection element for the lower limit position of the push rod body 6's stroke. A second micro switch 23 is provided at the upper end inside the mounting frame 21. The second micro switch 23 is normally open and is used to detect the upper limit position of the push rod body 6's stroke.

[0038] When the drive motor 31 drives the second threaded block 5 to move upward, the contact block 8 on the second threaded block 5 will rise along with the movement of the second threaded block 5. Once the contact block 8 touches the second micro switch 23, the contact state of the second micro switch 23 changes, triggering the motor control circuit and stopping the drive motor 31, thereby achieving precise control over the upper limit of the stroke of the push rod body 6. By adjusting the position of the second micro switch 23, the stroke distance of the push rod body 6 can be changed.

[0039] The first threaded block 26 is fixed to one side of the second micro switch 23 by bolts. The first lead screw 24 is installed on one side of the inside of the mounting frame 21 through a bearing seat. The first lead screw 24 is threadedly connected to the first threaded block 26. The upper end of the first lead screw 24 passes through the mounting frame 21 and is fixedly installed with a handle 210. The surface of the handle 210 is designed with anti-slip texture to facilitate the operator's rotation.

[0040] When the operator turns the handle 210, the first lead screw 24 rotates accordingly. Under the action of the threaded transmission, the first threaded block 26 drives the second micro switch 23 to move up and down along the axis of the first lead screw 24, thereby precisely adjusting the distance between the second micro switch 23 and the first micro switch 22, and thus realizing flexible adjustment of the stroke of the push rod body 6.

[0041] To ensure the linearity and stability of the movement of the second micro switch 23, a guide rod 25 is fixed on the other side inside the mounting frame 21. The guide rod 25 is an optical axis. A guide block 27 is fixed on the other side of the second micro switch 23. The guide block 27 has a guide hole (not marked in the figure) that matches the guide rod 25. The guide rod 25 and the guide block 27 are fitted with a clearance to ensure that the guide block 27 can slide smoothly on the guide rod 25 and play a good limiting role for the second micro switch 23.

[0042] A transparent plate 28 is fixed to one side of the mounting frame 21. The transparent plate 28 is made of acrylic material, and its surface is set with scale lines 29 by laser engraving. The accuracy of the scale lines 29 can reach 0.1mm. When adjusting the position of the second micro switch 23, the operator can accurately obtain the adjustment distance of the second micro switch 23 by observing the scale lines 29 on the transparent plate 28, thereby realizing the control of the stroke of the push rod body 6 and improving the convenience of stroke adjustment.

[0043] Working principle: When the push rod motor starts, the drive motor 31 is fixed to one side of the base 1. Its output end is connected to the first synchronous pulley 32 via a key. With the help of the polyurethane synchronous belt 34, the power is transmitted to the second synchronous pulley 33 at the lower end of the second lead screw 7, driving the second lead screw 7 to rotate. The second lead screw 7 adopts a trapezoidal thread design, which is tightly engaged with the internal thread of the second threaded block 5. Based on the principle of screw transmission, the rotational motion of the lead screw is converted into the linear motion of the second threaded block 5 along the axis of the lead screw. The second threaded block 5 is made of a wear-resistant copper alloy material, and the push rod body 6 fixed at the upper end moves up and down accordingly.

[0044] To prevent the second threaded block 5 from rotating during movement, a strip groove 9 is provided on one side of the housing 4, and a contact block 8 welded to one side of the second threaded block 5 is embedded therein. Under the limiting effect of the strip groove 9, the second threaded block 5 can only move in a straight line, ensuring the stability of the push rod body 6 movement.

[0045] In terms of stroke control, adjustment is achieved through the adjusting component 2. The first micro switch 22 (normally closed) and the second micro switch 23 (normally open) within the mounting frame 21 serve as detection elements for the lower and upper stroke limits, respectively. When the second threaded block 5 drives the contact block 8 to move upward and touches the second micro switch 23, the contact state of the second micro switch 23 changes, triggering the motor control circuit and driving the motor 31 to stop operating, thereby controlling the upper stroke limit of the push rod body 6. Similarly, when the push rod body 6 moves downward and the contact block 8 touches the first micro switch 22, the motor will also stop, controlling the lower stroke limit.

[0046] To adjust the stroke of the push rod body 6, the operator can rotate the anti-slip handle 210 at the top of the first lead screw 24 on the mounting frame 21. The first lead screw 24 is threadedly connected to the first threaded block 26. When the lead screw is rotated, the first threaded block 26 drives the second micro switch 23 to move up and down along the axis of the lead screw. At the same time, the guide rod 25 inside the mounting frame 21 is clearance-fitted with the guide block 27 on the second micro switch 23 to ensure the linearity and stability of the movement of the second micro switch 23. The transparent acrylic plate on one side of the mounting frame 21 is engraved with a scale line 29 with an accuracy of 0.1mm. The operator can observe the scale line 29 to accurately adjust the position of the second micro switch 23 and change the distance between it and the first micro switch 22, thereby flexibly adjusting the stroke distance of the push rod body 6.

[0047] In addition, the transparent polycarbonate protective cover 35 at the lower end of the base 1 can prevent dust and debris from entering and protect the internal transmission components, and also facilitate the observation of the operating status of the first synchronous pulley 32, the second synchronous pulley 33 and the synchronous belt 34, ensuring the stable and reliable operation of the entire push rod motor stroke adjustment structure.

[0048] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A stroke adjustment structure for a push rod motor, characterized in that: include Base (1); The housing (4) is mounted on one side of the base (1), and the housing (4) is a hollow structure; Adjustment component (2) is installed on one side of the housing (4). The adjustment component (2) includes a mounting frame (21) fixedly installed on one side of the housing (4). A first micro switch (22) is fixed at the lower end inside the mounting frame (21), and a second micro switch (23) is provided at the upper end inside the mounting frame (21). The first threaded block (26) is installed on one side of the second micro switch (23), and the first lead screw (24) is rotatably installed on one side inside the mounting frame (21). The first lead screw (24) is threadedly connected to the first threaded block (26). A guide rod (25) is installed on the other side inside the mounting frame (21), and a guide block (27) is fixed on the other side of the second micro switch (23). The guide rod (25) and the guide block (27) are slidably connected.

2. The stroke adjustment structure of the push rod motor according to claim 1, characterized in that: A transparent plate (28) is fixed to one side of the mounting frame (21).

3. The stroke adjustment structure of the push rod motor according to claim 2, characterized in that: The transparent plate (28) is made of acrylic material and has scale lines (29) on its surface.

4. The stroke adjustment structure of the push rod motor according to claim 1, characterized in that: The upper end of the first lead screw (24) passes through the mounting frame (21) and is fixedly mounted with a handle (210).

5. The stroke adjustment structure of the push rod motor according to claim 1, characterized in that: The housing (4) has a second threaded block (5) slidably connected inside. The upper end of the second threaded block (5) is fixed with a push rod body (6). The base (1) is rotatably mounted with a second lead screw (7). The second lead screw (7) is threadedly connected to the second threaded block (5). A strip groove (9) is opened on one side of the housing (4). A contact block (8) is fixed on one side of the second threaded block (5) and can slide inside the strip groove (9). The lower end of the base (1) is provided with a drive assembly (3) for driving the second lead screw (7) to rotate.

6. The stroke adjustment structure of the push rod motor according to claim 5, characterized in that: The drive assembly (3) includes a drive motor (31) fixedly installed on the other side of the base (1). The output end of the drive motor (31) passes through the base (1) and is fixed with a first synchronous pulley (32). The lower end of the second lead screw (7) passes through the base (1) and is fixed with a second synchronous pulley (33). The outer walls of the first synchronous pulley (32) and the second synchronous pulley (33) are fitted with a synchronous belt (34).

7. The stroke adjustment structure of the push rod motor according to claim 6, characterized in that: A protective cover (35) is fixedly installed at the lower end of the base (1).

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