Variable-speed transmission module

Abstract

The utility model belongs to the technical field of high-voltage switch industry, and particularly discloses a variable-speed transmission module, which comprises a supporting seat, a crank arm is rotatably sleeved on the supporting seat through a rotating shaft, a cam groove is arranged on the supporting seat, a first fixing pin is sleeved on the cam groove, a movable groove is arranged on the crank arm, and a second fixing pin is arranged on the movable groove. The crank arms are jointly and movably connected with the connecting rod in a sleeved mode through first fixing pins. According to the utility model, the fixed pin I moves in the cam groove of the support frame, and the slide block slides in the movable groove of the crank arm or changes the shape and the size of the cam groove on the support seat according to actual needs to obtain different strokes and different transmission speeds in different stroke intervals, thereby realizing correct closing or opening of the circuit breaker. And finally, the optimal breaking performance of the vacuum circuit breaker is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of high-voltage switch industry, and specifically relates to a variable speed transmission module. Background Art

[0002] Transmission modules are an important part of circuit breakers and disconnectors. Their main functions include: The transmission module is responsible for transmitting the operating force (such as manual, electric or pneumatic) to the mechanical part of the circuit breaker or disconnector to achieve the closing or opening of the switch. In some cases, the transmission module can control the speed of operation to ensure a smooth and uniform operation of the circuit breaker or disconnector. The design and performance of the transmission module are crucial to the reliability and efficiency of circuit breakers and disconnectors. They need to meet strict technical specifications and safety standards to ensure the stable operation of the power system.

[0003] The transmission module used in existing circuit breakers and disconnectors is a crank transmission. Figure 1 As shown, the relevant structure of the crank arm transmission (i.e., the transmission module) includes: an input shaft, an output shaft, a crank arm and a pull rod, and the two ends of the crank arm are respectively sleeved on the input shaft and the output shaft, and the pull rod is sleeved on the output shaft. The main transmission process is as follows: when the input shaft rotates at a certain angular velocity ω, it drives the crank arm to move, the crank arm drives the output shaft to rotate, and finally drives the pull rod to move, and the speed of the pull rod is its output as a uniform speed v=ω*L.

[0004] Therefore, the transmission module cannot meet the different speed requirements of the vacuum circuit breaker in different travel sections, which results in the circuit breaker being unable to be closed or opened correctly, and ultimately failing to achieve the optimal breaking performance of the vacuum circuit breaker. Utility Model Content

[0005] After research, the inventor found that the motion process of the existing transmission module requires a constant speed within a certain period of time (such as Figure 2 As shown), for example, in the time period t0-t1, a constant speed of v1 is required, in the time period t1-t2, a constant speed of v2 is required, and in the time period t2-t3, a constant speed of v3 is required; for this reason, the utility model provides a variable speed transmission module, which aims to achieve different speeds in different travel sections of the vacuum circuit breaker, so that the circuit breaker can be correctly closed or opened, and finally achieve the best breaking performance of the vacuum circuit breaker.

[0006] The technical problem to be solved by the utility model is achieved by adopting the following technical solutions:

[0007] A variable speed transmission module comprises a support base, a crank arm is rotatably sleeved on the support base via a rotating shaft, a cam groove is provided on the support base, a fixing pin is sleeved on the cam groove, and the crank arm is movably sleeved with a connecting rod via the fixing pin.

[0008] By adopting the above scheme, a suitable cam groove curve is designed according to the interval speed required for vacuum breaking. When the shaft rotates at a fixed angular velocity ω, the distance between the center of the slider and the shaft is different, and the output speed is different, thereby achieving different interval speeds required for vacuum breaking.

[0009] When the fixed pin moves along the cam groove, the slider slides in the movable groove of the crank arm, so that the length of the crank arm changes with the rotation angle, thereby achieving the adjustment of the output force and output speed.

[0010] The shape and size of the cam groove of the support frame are designed according to the requirements of the circuit breaker stroke and stroke segment speed value so as to obtain the required interval speed.

[0011] Preferably, a movable groove is provided on the crank arm, a slider is slidably installed in the movable groove, and the crank arm is movably connected with the connecting rod and the slider through a fixing pin.

[0012] Preferably, the cam groove is provided with at least one bend.

[0013] Preferably, the cam groove comprises a running segment 1, a bending segment and a running segment 2, and the running segment 1, the bending segment and the running segment 2 are connected in sequence, and the running segment 1 and the running segment 2 form an obtuse angle on the support seat.

[0014] Preferably, the support seat comprises a connecting portion and two connecting ears, the two connecting ears are arranged on the top of the connecting portion, and there is a gap between the two connecting ears, a rotating shaft installation groove is commonly opened on the two connecting ears, the rotating shaft is arranged in the gap, and its two ends are rotatably sleeved in the rotating shaft installation groove through bearings;

[0015] There are two cam grooves, which are respectively opened on the connecting ear parts, and each cam groove is located on one side of the shaft mounting groove. The fixing pin is also arranged in the gap, and its two ends are respectively rotatably sleeved in the cam grooves.

[0016] Preferably, the crank arm is arranged in the gap, and a rotating shaft mounting hole is opened on the crank arm and is located at one end of the movable groove, and the crank arm is sleeved on the rotating shaft through the rotating shaft mounting hole.

[0017] Furthermore, the rotating shaft mounting hole and the rotating shaft are fixed together by a fixing pin.

[0018] Furthermore, the crank arm includes a sleeve portion and a hinge portion, and one end of the hinge portion is fixed to a side wall of the sleeve portion, the shaft mounting hole is provided on the sleeve portion, and the movable groove is provided on the hinge portion.

[0019] Preferably, the cross-sectional shape of the slider is rectangular, and the slider slides in the movable groove.

[0020] Furthermore, the cross-sectional shape of the slider is a square.

[0021] Preferably, an insulating pull rod is rotatably sleeved on one end of the connecting rod.

[0022] Preferably, a notch 1 and a notch 2 are respectively formed at both ends of the connecting rod, the insulating pull rod is rotatably mounted on the notch 1 through a fixing pin 3, and the connecting rod is mounted on the fixing pin 1 through the notch 2.

[0023] Furthermore, the connecting rod is in an "H" shape, and the first notch and the second notch are respectively located at the openings of the "H" shape.

[0024] The beneficial effects of the utility model are:

[0025] (1) The fixed pin in the utility model moves in the cam groove of the support frame, and the slider slides in the movable groove of the crank arm, or the shape and size of the cam groove on the support seat are changed according to actual needs to obtain different strokes and different transmission speeds in different stroke intervals, so as to achieve the correct closing or opening of the circuit breaker, and finally achieve the best breaking performance of the vacuum circuit breaker;

[0026] (2) The utility model adopts the transmission of a rotating shaft, a crank arm and a connecting rod to drive the insulating pull rod to move, so as to realize the contact or separation of the moving and static contacts in the vacuum circuit breaker, thereby realizing the separation and closing of the arc extinguishing chamber in the vacuum circuit breaker; the utility model simplifies the product structure, reduces the cost, improves the breaking reliability, reduces the impact speed and improves the mechanical operating life; it has the characteristics of variable speed in a specified travel section, simple structure and reliable transmission, and effectively replaces the transmission module in the prior art that cannot meet the different speed requirements of the vacuum circuit breaker in different travel sections. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram in the prior art;

[0028] Figure 2 For Figure 1 Schematic diagram of the transmission relationship between time and speed demonstrated on the basis;

[0029] Figure 3 It is a three-dimensional structural schematic diagram of the utility model;

[0030] Figure 4 It is a front view of the utility model;

[0031] Figure 5 for Figure 4 Schematic diagram of the structure in the middle AA direction;

[0032] Figure 6 for Figure 5Schematic diagram of the structure of part C;

[0033] Figure 7 for Figure 5 Schematic diagram of the structure in the middle BB direction;

[0034] Figure 8 It is a schematic diagram of the three-dimensional structure of the support seat in the utility model;

[0035] Fig. 9 It is a three-dimensional structural schematic diagram of the crank arm in the utility model;

[0036] Fig.10 It is a three-dimensional structural schematic diagram of the connecting rod in the utility model;

[0037] In the figure: support seat 1, connecting part 11, connecting ear 12, shaft mounting groove 13, cam groove 14, running section 1 141, bending section 142, running section 2 143, shaft 2, bearing 3, crank arm 4, hinged part 41, sleeve part 42, shaft mounting hole 43, movable groove 44, fixing pin 2 5, connecting rod 6, notch 1 61, notch 2 62, insulating pull rod 7, fixing pin 1 8, fixing pin 3 9, slider 10. DETAILED DESCRIPTION

[0038] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below in conjunction with specific illustrations.

[0039] like Figure 1-10As shown, a variable speed transmission module comprises a support base 1 formed by two connecting ears 12 fixed on the top of a connecting portion 1, and there is a gap between the two connecting ears 12, a shaft mounting groove 13 is commonly provided on the two connecting ears 12, a shaft 2 is provided in the gap, and both ends thereof are rotatably sleeved in the shaft mounting groove 13 through bearings 3; a crank arm 4 is rotatably sleeved on the support base 1 through the shaft 2, a cam groove 14 is provided on the support base 1, the cam groove 14 has a bend, that is, it is formed by connecting a running section 141, a bending section 142 and a running section 2 143 in sequence, and the running section 141 and the running section 2 143 form an obtuse angle on the support base 1, there are two cam grooves 14, which are respectively provided on the connecting ears 12, and each cam groove 14 is located on one side of the shaft mounting groove 13, a fixing pin 1 8 is also provided in the gap, and Its two ends are rotatably sleeved in the cam groove 14 respectively; the crank arm 4 is arranged in the gap, and a shaft mounting hole 43 is opened on the crank arm 4, and is located at one end of the movable groove 44, and the crank arm 4 is fixed on the shaft mounting hole 43 by the fixing pin 2 5 sleeved on the rotating shaft 2; the crank arm 4 is formed by one end of the hinge part 41 being fixed to the side wall of the sleeve part 42, the shaft mounting hole 43 is opened on the sleeve part 42, and the hinge part 41 is opened on the movable groove 44, and a slider 10 with a square cross-section is slidably installed in the movable groove 44, and the crank arm 4 is movably sleeved with the connecting rod 6 and the slider 10 in the shape of "H" through a fixing pin 1 8; wherein the openings on the "H"-shaped connecting rod 6 are respectively defined as notch 1 61 and notch 2 62, the insulating pull rod 7 is rotatably installed on the notch 1 61 through the fixing pin 3 9, and the connecting rod 6 is installed on the fixing pin 1 8 through the notch 2 62.

[0040] By adopting the above scheme, a suitable cam groove 14 curve is designed according to the interval speed required for vacuum breaking. When the shaft 2 rotates at a fixed angular velocity ω, the distance between the center of the slider 10 and the shaft 2 is different, and the output speed is different, thereby achieving different interval speeds required for vacuum breaking.

[0041] When the fixed pin 8 moves along the cam groove 14, the slider 10 slides in the movable groove 44 of the crank arm 4, so that the length of the crank arm 4 changes with the rotation angle, thereby achieving the adjustment of the output force and the output speed.

[0042] The shape and size of the cam groove 14 of the support frame 1 are designed according to the requirements of the circuit breaker stroke and stroke segment speed value so as to obtain the required interval speed.

[0043] It should be noted that, in the utility model, an external operating mechanism (existing technology can be used) is required to drive the rotating shaft 2 to rotate, thereby driving the crank arm 4 to swing (the reason for the swing is that the rotating shaft 2 rotates, and the crank arm 4 should also rotate, but because the slider 10 in the movable groove 44 on the crank arm 4 is sliding, and the slider 10 is restricted by the movement of the fixed pin 8 on the cam groove 14, it drives the crank arm 4 to swing). When the crank arm 4 swings, it is restricted by the shape and size of the cam groove 14. In this embodiment, the movable groove 141, the arc groove 142 and the movable groove 2 143 are connected in sequence, and the movable groove 141 and the movable groove 2 143 are arranged at an obtuse angle on the support seat 1 to obtain different strokes and different transmission speeds in different stroke intervals, thereby achieving the correct closing or disconnection of the circuit breaker, and finally achieving the best breaking performance of the vacuum circuit breaker.

[0044] The utility model adopts the transmission of the rotating shaft 2, the crank arm 4 and the connecting rod 6 to drive the insulating pull rod 7 to move, so as to realize the opening and closing of the arc extinguishing chamber in the vacuum circuit breaker; it has the characteristics of variable speed in a specified stroke section, simple structure and reliable transmission, and effectively replaces the transmission module in the prior art that cannot meet the different speed requirements of the vacuum circuit breaker in different stroke sections, so as to realize the correct closing or opening of the circuit breaker, and finally realize the best breaking performance of the vacuum circuit breaker;

[0045] The utility model can change the shape and size of the cam groove on the support seat and the movement of the fixed pin 8 in the cam groove 14 of the support frame 1, and the slide block 10 slides in the movable groove of the crank arm 4 according to actual needs, so as to obtain different strokes and different transmission speeds in different stroke intervals. The principle is that when the rotating shaft 2 rotates at a fixed angular velocity ω, the distance between the slide block 10 and the fixed pin 8 is different according to the different positions of the fixed pin 8, so as to achieve different opening and closing speeds in different time periods; this simple variable speed transmission device can effectively control the interval speed during vacuum breaking, which is more conducive to the breaking of the vacuum circuit breaker.

[0046] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A variable speed transmission module, comprising a support seat, characterized in that: A crank arm is rotatably sleeved on the support seat via a rotating shaft, a cam groove is provided on the support seat, a fixing pin 1 is sleeved on the cam groove, and the crank arm is movably sleeved with a connecting rod via the fixing pin 1.

2. A variable speed transmission module according to claim 1, characterized in that: The crank arm is provided with a movable groove, a sliding block is slidably installed in the movable groove, and the crank arm is movably sleeved with the connecting rod and the sliding block through a fixing pin.

3. A variable speed transmission module according to claim 1 or 2, characterized in that: The cam groove is provided with at least one bend.

4. A variable speed transmission module according to claim 3, characterized in that: The cam groove comprises a running section 1, a bending section and a running section 2, and the running section 1, the bending section and the running section 2 are connected in sequence, and the running section 1 and the running section 2 form an obtuse angle on the support seat.

5. A variable speed transmission module according to claim 2, characterized in that: A rotating shaft mounting hole is provided on the crank arm and is located at one end of the movable groove. The crank arm is sleeved on the rotating shaft through the rotating shaft mounting hole.

6. A variable speed transmission module according to claim 5, characterized in that: The crank arm includes a sleeve portion and a hinge portion, and one end of the hinge portion is fixed to a side wall of the sleeve portion, the rotating shaft mounting hole is arranged on the sleeve portion, and the movable groove is arranged on the hinge portion.

7. A variable speed transmission module according to claim 2, characterized in that: The cross-sectional shape of the slider is rectangular, and the slider slides in the movable groove.

8. A variable speed transmission module according to claim 1, characterized in that: An insulating pull rod is rotatably sleeved on one end of the connecting rod.

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