Cam mechanism and valve comprising same
By designing a cam mechanism to directly press the microswitch contact, the problem of insufficient triggering accuracy of the microswitch is solved, achieving higher triggering accuracy and a simpler structure.
Patent Information
- Application Number
- CN202520309533.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-02-26
AI Technical Summary
The triggering accuracy of microswitches in the existing technology is not accurate enough, mainly because the position sensor triggers the switch through signal transmission, resulting in insufficient accuracy.
A cam mechanism was designed, including a rotating column and a rotation drive mechanism. The micro switch is triggered by directly pressing the contact of the micro switch by rotating the pressing surface of the rotating column. The rotating column is integrally injection molded from a first arc-shaped column, a second arc-shaped column and a pressing surface, which has a stable connection and simple structure.
It achieves higher triggering accuracy of microswitches, improves triggering accuracy through direct contact triggering, and has a simple structure and is easy to manufacture.
Smart Images
Figure CN223938821U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a cam mechanism and a valve containing the same, belonging to the field of valve technology. Background Technology
[0002] A microswitch is a contact mechanism with tiny contact intervals and a quick-acting mechanism, which performs switching actions with a specified stroke and force. In valves, microswitches are generally triggered by position sensors. However, because the position sensor triggers the microswitch through signal transmission, its accuracy is not precise enough. Utility Model Content
[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a cam mechanism and a valve containing the same, which can improve the triggering accuracy of micro switches.
[0004] To achieve the aforementioned objectives, the technical solution adopted by this utility model includes:
[0005] This utility model discloses a cam mechanism, including a rotating column and a rotation drive mechanism. The rotating column includes a first arc-shaped column and a second arc-shaped column. The diameter of the first arc-shaped column is larger than the diameter of the second arc-shaped column. A pressing surface is provided between the first arc-shaped column and the second arc-shaped column. The pressing surface is inclined. The rotation drive mechanism is used to drive the rotating column to rotate. Under the drive of the rotation drive mechanism, the rotating column rotates so that the pressing surface presses a micro switch.
[0006] Furthermore, the first arc-shaped column, the second arc-shaped column, and the pressing surface are integrally injection molded.
[0007] Furthermore, the rotation drive mechanism includes a first gear, which is fixedly connected to the rotating column via a connecting column. The rotation of the first gear drives the connecting column and the rotating column to rotate, and the connecting column is disposed on the inner surface of the first gear.
[0008] Furthermore, a second gear is meshed with one side of the first gear, and a motor is connected to the drive end of the second gear. The drive shaft of the motor is connected to the drive end of the second gear.
[0009] Furthermore, a rack is meshed with one side of the first gear, and a cylinder is fixedly connected to one side of the rack. The driving end of the cylinder is fixedly connected to the rack, and the rack moves linearly under the drive of the cylinder to drive the first gear to rotate.
[0010] Another aspect of this utility model discloses a valve, including a cam mechanism. The valve also includes a circuit board, and the rotating column is rotatably connected to the circuit board. At least one micro switch is provided on the circuit board, and the trigger head of the micro switch corresponds to the longitudinal position of the pressing surface. Under the drive of the rotation drive mechanism, the rotating column rotates, and the pressing surface presses the trigger head of one of the micro switches to trigger the micro switch.
[0011] Furthermore, the valve also includes a housing, and the rotating column, circuit board, and rotating drive mechanism are all disposed inside the housing.
[0012] Compared with the prior art, the advantages of this utility model include:
[0013] 1) The cam mechanism provided by this utility model drives the pressing surface to rotate by rotating the rotating column, and triggers the micro switch by pressing the contact of the micro switch through the pressing surface. That is, the micro switch is triggered by direct contact with the micro switch. Compared with the previous method of triggering the micro switch by signal, the triggering of the micro switch by this application is more accurate.
[0014] 2) The cam mechanism provided by this utility model is integrally injection molded with the first arc-shaped column, the second arc-shaped column and the pressing surface. The integrally injection molded rotating column structure is simple and easy to process. No other connecting structure is required between the first arc-shaped column, the second arc-shaped column and the pressing surface, and the connection between the first arc-shaped column, the second arc-shaped column and the pressing surface is stable. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a front view of a cam mechanism provided in a typical embodiment of this utility model;
[0017] Figure 2 yes Figure 1 A magnified view of a portion of the image;
[0018] Figure 3 This is a front view of a partial structure of a valve provided in a typical embodiment of this utility model;
[0019] Figure 4 This is a top view of a portion of the structure of a valve provided in a typical embodiment of this utility model;
[0020] Explanation of reference numerals in the attached drawings: 1. Rotating column; 2. First arc-shaped column; 3. Second arc-shaped column; 4. Pressing surface; 5. Rotation drive mechanism; 7. Circuit board; 8. Micro switch. Detailed Implementation
[0021] In view of the shortcomings of the prior art, the inventor of this case, through long-term research and extensive practice, has come up with the technical solution of this utility model. The following will further explain the technical solution, its implementation process, and its principles.
[0022] like Figure 1 , Figure 2 As shown, this utility model discloses a cam mechanism, including a rotating column 1 and a rotating drive mechanism 5. The rotating column 1 includes a first arc-shaped column 2 and a second arc-shaped column 3. The diameter of the first arc-shaped column 2 is larger than the diameter of the second arc-shaped column 3. A pressing surface 4 is provided between the first arc-shaped column 2 and the second arc-shaped column 3. The pressing surface 4 is inclined and is used to press the contact of a micro switch 8 to trigger the micro switch 8 to operate. The inclination degree and thickness of the pressing surface 4 are set according to the required pressing stroke of the micro switch 8. In this embodiment, the inclination angle of the pressing surface 4 is 45°. Preferably, the first arc-shaped column 2, the second arc-shaped column 3, and the pressing surface 4 are integrally injection molded. The integrally injection molded rotating column 1 has a simple structure and is easy to process. No other connecting structure is required between the first arc-shaped column 2, the second arc-shaped column 3, and the pressing surface 4, and the connection between the first arc-shaped column 2, the second arc-shaped column 3, and the pressing surface 4 is stable.
[0023] The rotation drive mechanism 5 is at least used to drive the rotating column 1 to rotate. Under the drive of the rotation drive mechanism 5, the rotating column 1 rotates so that the pressing surface 4 presses the micro switch 8. Specifically, the rotation drive mechanism includes a first gear, which is fixedly connected to the rotating column 1 through a connecting column. The rotation of the first gear drives the connecting column and the rotating column 1 to rotate. The connecting column is disposed on the inner surface of the first gear.
[0024] This application drives the pressing surface 4 to rotate by rotating the rotating column 1. The pressing surface 4 presses the contact of the micro switch 8 to trigger the micro switch 8. That is, the micro switch 8 is triggered by direct contact with the micro switch 8. Compared with the previous method of triggering the micro switch 8 by signal, the triggering of the micro switch 8 in this application is more accurate.
[0025] In one implementation, a second gear is meshed with one side of the first gear, and a motor is connected to the drive end of the second gear. The drive shaft of the motor is connected to the drive end of the second gear. During operation, the motor rotates, driving the second gear to rotate. The rotation of the second gear drives the first gear meshing with it to rotate, thereby driving the rotating column 1 to rotate. During the rotation of the rotating column 1, the pressing surface 4 rotates. The pressing surface 4 gradually presses the contact of the micro switch 8 during the rotation of the rotating column 1 until the micro switch 8 is triggered.
[0026] In another implementation, a rack is meshed with one side of the first gear, and a cylinder is fixedly connected to one side of the rack. The driving end of the cylinder is fixedly connected to the rack. Under the drive of the cylinder, the rack moves linearly to drive the first gear to rotate. During operation, the cylinder drives the rack to move directly, and the rack's movement drives the first gear meshing with it to rotate, thereby driving the rotating column 1 to rotate, which in turn drives the pressing surface 4 to rotate. The pressing surface 4 gradually presses the contact of the micro switch 8 until the micro switch 8 is triggered.
[0027] This utility model also discloses a valve, such as Figure 3 , Figure 4 As shown, the valve includes a cam mechanism and a circuit board 7. The rotating column 1 is rotatably connected to the circuit board 7. At least one microswitch 8 is provided on the circuit board 7. One or two microswitches 8 can be provided; in this embodiment, two microswitches 8 are provided. The two microswitches 8 are positioned between two pressing surfaces 4. The trigger head of each microswitch 8 corresponds to the longitudinal position of the pressing surface 4. Under the drive of the rotation drive mechanism 5, the rotating column 1 rotates, and the pressing surface 4 presses the trigger head of one of the microswitches 8 to trigger it. Specifically, when the rotating column 1 rotates counterclockwise, one pressing surface 4 can press the contact of one of the microswitches 8; when the rotating column 1 rotates clockwise, the other pressing surface 4 can press the contact of the other microswitch 8.
[0028] In some implementations, the valve also includes a housing, and the rotating column, circuit board and rotating drive mechanism are all housed inside the housing.
[0029] It should be understood that the above embodiments are merely illustrative of the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.
Claims
1. A cam mechanism, characterized in that: include A rotating column (1) includes a first arc-shaped column (2) and a second arc-shaped column (3). The diameter of the first arc-shaped column (2) is larger than the diameter of the second arc-shaped column (3). A pressing surface (4) is provided between the first arc-shaped column (2) and the second arc-shaped column (3). The pressing surface (4) is inclined. A rotation drive mechanism (5) is used to drive the rotating column (1) to rotate. Under the drive of the rotation drive mechanism (5), the rotating column (1) rotates so that the pressing surface (4) presses the micro switch (8).
2. The cam mechanism according to claim 1, characterized in that: The first arc-shaped column (2), the second arc-shaped column (3), and the pressing surface (4) are integrally injection molded.
3. A cam mechanism according to claim 1, characterized in that: The rotation drive mechanism includes a first gear, which is fixedly connected to the rotating column (1) via a connecting column. The rotation of the first gear drives the connecting column and the rotating column (1) to rotate. The connecting column is disposed on the inner surface of the first gear.
4. A cam mechanism according to claim 3, characterized in that: A second gear is meshed with one side of the first gear, and a motor is connected to the drive end of the second gear. The drive shaft of the motor is connected to the drive end of the second gear.
5. A cam mechanism according to claim 3, characterized in that: A rack is meshed with one side of the first gear, and a cylinder is fixedly connected to one side of the rack. The driving end of the cylinder is fixedly connected to the rack. Under the drive of the cylinder, the rack moves linearly to drive the first gear to rotate.
6. A valve, characterized in that: The valve includes the cam mechanism according to any one of claims 1-5, and further includes a circuit board (7), wherein the rotating column (1) is rotatably connected to the circuit board (7); at least one micro switch (8) is provided on the circuit board (7), wherein the trigger head of the micro switch (8) corresponds to the longitudinal position of the pressing surface (4), and the rotating column (1) rotates under the drive of the rotation drive mechanism (5), and the pressing surface (4) presses the trigger head of one of the micro switches (8) to trigger the micro switch (8).
7. A valve according to claim 6, characterized in that: The valve also includes a housing, and the rotating column (1), circuit board (7) and rotating drive mechanism (5) are all located inside the housing.