Mechanical locking device for pull rope handle
By designing a shorter lever and combining rocker, limit pin, adjustment pin hole and locking rod, the unreliable locking problem caused by excessive length of lever in the traditional pull rope handle mechanical locking device is solved, and a more stable cabinet is achieved Door locking effect.
Patent Information
- Application Number
- CN202421220371.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-05-31
AI Technical Summary
In the traditional mechanical locking device of pull rope handle, the long lever leads to unstable gravity, the pin inserted into the movable door is unreliable, and the position change is unstable due to changes in angle.
A mechanical locking device for pulling rope handles is designed, using a short lever, and a rocker rotating with the rotation shaft as the center is arranged on its right side, with a limiting pin and an adjustment pin hole, combining the locking rod and a guide locking groove. Ensure the sensitivity and stability of the lever.
It effectively avoids unreliable locking problems caused by gravity of the lever, ensures the reliability of the cabinet door when the closing position, and avoids unstable position changes caused by angle changes.
Smart Images
Figure CN222462657U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power distribution cabinet locking, in particular to a mechanical locking device for a pull rope handle. Background Art
[0002] In power distribution cabinets and control cabinets, molded case circuit breakers are used to protect the power distribution system and branch lines from short circuits and overloads. A pull rope kit is installed on the operating head of the molded case circuit breaker body, and the pull rope handle is located on the cabinet door of the cabinet, and the two are connected by a steel cable. Pushing the pull rope handle upwards can realize the closing operation of the molded case circuit breaker, and vice versa, it can be opened. The pull rope handle is simpler and more labor-saving than the direct operation handle. Due to the central position of the pull rope handle, it can be not in a straight line with the operating head on the molded case circuit breaker body, so the layout inside the cabinet becomes more convenient. Therefore, the use of pull rope handles in the field of industrial automation is becoming more and more widespread.
[0003] In the field of industrial automation, in order to achieve electrical safety, it is required that the cabinet door cannot be opened when the molded case circuit breaker is closed. Therefore, a mechanical locking mechanism needs to be set for the pull rope handle, that is, when the pull rope handle is in the closed position, the cabinet door cannot be opened. The traditional method is to install a lever on the linkage rod of the pull rope handle. When the pull rope handle is pushed up, the lever rises and inserts into the lower part of the latch on the movable door. At this time, the lever is locked by the latch and the cabinet door can no longer be opened.
[0004] However, the significant disadvantage of this method is that the lever should not be too long. If it is too long, it will sag due to its own gravity, causing unreliable insertion of the latch on the movable door. In addition, if the lever is too long, there will be a slight angle change at the pull rope handle, which will cause a large position change of the lever near the top of the latch, which will also cause unreliable insertion of the latch on the movable door. Summary of the invention
[0005] The utility model aims to provide a mechanical locking device for a pull rope handle to solve the problems existing in the above-mentioned background technology.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a mechanical locking device for a pull rope handle, comprising a pull rope steel cable 1, a lever 2, a lower connecting rod 3, a transition connecting plate 5, an upper connecting rod 6 and an operating lever 7, wherein the upper and lower ends of the transition connecting plate 5 are respectively connected to the upper connecting rod 6 and the pull rope steel cable 1, the lower connecting rod 3 is connected to the lever 2, and the operating lever 7 controls the lower connecting rod 3 and the upper connecting rod 6 to rotate downward and upward respectively through gears, driving the pull rope steel cable 1 to move upward and the lever 2 to move downward, and the characteristic is that a seesaw 8 rotating with a rotating shaft 10 as the center is provided on the right side of the lever 2, and a limit pin 11 cooperating with the lever 2 is provided on the left side of the seesaw 8, and the rotation of the lever 2 drives the seesaw 8 to rotate with the rotating shaft 10 as the origin.
[0007] Preferably, four vertically symmetrical adjusting pin holes 12 are provided on the left side of the rocker plate 8, and a height difference is provided between two upper and lower adjusting pin holes 12.
[0008] Preferably, an obliquely arranged guide lock groove 14 is provided on the right side of the rocker plate 8, and a hole 13 cooperating with the rotating shaft 10 is provided in the middle.
[0009] Preferably, two symmetrically arranged limit pins 11 are provided on the left side of the rocker 8 , and the distance between the limit pins 11 is greater than the height of the lever 2 .
[0010] Preferably, the guide locking groove 14 is provided with a locking rod 9 .
[0011] Compared with the prior art, the utility model has the following beneficial effects: first, the lever is shorter, which prevents the lever from sagging due to its own gravity, resulting in unreliable situations after the latch on the movable door is inserted; second, a locking rod is provided, which prevents the lever from sagging due to its own gravity; third, there is a gap between the lever and the seesaw, which prevents a slight angle change at the pull rope handle, resulting in a large position change of the lever near the top of the latch. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a structural schematic diagram of the utility model;
[0013] Figure 2 for Figure 1 A front view of
[0014] Figure 3 for Figure 1 A schematic structural diagram of the middle rocker (8).
[0015] In the figure: 1. Pull rope cable; 2. Push rod; 3. Lower connecting rod; 4. Support plate; 5. Transition connecting plate; 6. Upper connecting rod; 7. Joystick; 8. Rocker; 9. Lock rod; 10. Rotating shaft; 11. Limit pin; 12. Adjustment pin hole; 13. Hole; 14. Guide lock groove. DETAILED DESCRIPTION
[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0017] See also Figure 1The utility model provides a technical solution: a mechanical locking device for a pull rope handle, comprising a pull rope steel cable 1, a lever 2, a lower connecting rod 3, a transition connecting plate 5, an upper connecting rod 6 and a joystick 7. The upper and lower ends of the transition connecting plate 5 are respectively connected to the upper connecting rod 6 and the pull rope steel cable 1, the lower connecting rod 3 is connected to the lever 2, and the joystick 7 controls the lower connecting rod 3 and the upper connecting rod 6 to rotate downward and upward respectively in the form of gears, thereby driving the pull rope steel cable 1 to move upward and the lever 2 to move downward.
[0018] A seesaw 8 rotating around a rotating shaft 10 is provided on the right side of the lever 2, and two symmetrically arranged limit pins 11 cooperating with the lever 2 are provided on the left side of the seesaw 8, and the distance between the limit pins 11 is greater than the height of the lever 2; four upper and lower symmetrical adjustment pin holes 12 are provided on the left side of the seesaw 8, and a height difference is provided between the upper and lower adjustment pin holes 12, and the distance between the pin holes 12 can be adjusted as needed to achieve the sensitivity of the control of the lever 2.
[0019] An obliquely arranged guide lock groove 14 is provided on the right side of the rocker 8. The guide lock groove 14 is equipped with a lock rod 9, and a hole 13 cooperating with the rotating shaft 10 is provided in the middle. The rotation of the lever 2 drives the rocker 8 to rotate with the rotating shaft 10 as the origin, and the lock rod 9 slides in the guide lock groove 14 to limit the rotation angle of the rocker 8.
[0020] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A mechanical locking device for a pull rope handle, comprising a pull rope steel cable (1), a lever (2), a lower connecting rod (3), a transition connecting plate (5), an upper connecting rod (6) and an operating lever (7), wherein the upper and lower ends of the transition connecting plate (5) are respectively connected to the upper connecting rod (6) and the pull rope steel cable (1), the lower connecting rod (3) is connected to the lever (2), and the operating lever (7) controls the lower connecting rod (3) and the upper connecting rod (6) to rotate downward and upward respectively through the form of gears, thereby driving the pull rope steel cable (1) upward and the lever (2) downward, wherein the device is characterized in that: A seesaw (8) rotating around a rotating shaft (10) is provided on the right side of the lever (2), and a limit pin (11) cooperating with the lever (2) is provided on the left side of the seesaw (8). The rotation of the lever (2) drives the seesaw (8) to rotate around the rotating shaft (10) as the origin.
2. A pull rope handle mechanical locking device according to claim 1, characterized in that: The left side of the seesaw (8) is provided with four vertically symmetrical adjusting pin holes (12), and a height difference is provided between the two upper and lower adjusting pin holes (12).
3. A pull rope handle mechanical locking device according to claim 1, characterized in that: The right side of the seesaw (8) is provided with an obliquely arranged guide lock groove (14), and the middle is provided with a hole (13) that matches the rotating shaft (10).
4. A pull rope handle mechanical locking device according to claim 2, characterized in that: Two symmetrically arranged limit pins (11) are provided on the left side of the rocker (8), and the distance between the limit pins (11) is greater than the height of the shifting rod (2).
5. A pull rope handle mechanical locking device according to claim 3, characterized in that: The guide locking groove (14) is provided with a locking rod (9).