Multi-fulcrum displacement direction adjusting transmission mechanism and circuit breaker

Abstract

The utility model discloses a multi-fulcrum displacement direction adjusting transmission mechanism and circuit breaker, comprising an input device and a displacement conversion mechanism, the displacement conversion mechanism comprises: a driving rod, the first end of which is in transmission connection with the input device; the first end of the driven connecting rod is hinged to the second end of the driving rod; the first end of the sliding block connecting rod is hinged to the sliding block device, and the second end of the sliding block connecting rod is hinged to the second end of the driven connecting rod; the first end of the driving connecting rod is hinged to the rack, and the second end of the driving connecting rod is hinged to the first end of the driven connecting rod; the first end of the conversion connecting rod is hinged to the rack, the second end of the conversion connecting rod is hinged between the first end and the second end of the driven connecting rod, and the driving connecting rod and the conversion connecting rod are distributed on the two sides of the driven connecting rod. According to the utility model, the radial force generated in the movement process is reduced, and the stability in the movement process is improved. And the sliding block device moves approximately linearly, so that the radial displacement is reduced, and the running speed of the sliding block device can be increased.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, and in particular to a multi-support point displacement direction adjustment transmission mechanism and a circuit breaker. Background Art

[0002] Ultra-high voltage transmission is mainly used for large-capacity long-distance power transmission. It can shorten line corridors, reduce transmission losses, save investment and operating costs, alleviate local environmental pollution, improve the reliability of grid operation and achieve optimal allocation of energy resources. It has huge economic and social benefits and is an important development direction of the world's power grid technology.

[0003] Circuit breakers are the most important and complex electrical switchgear in the power system. They directly control the operation and exit of power grid lines and can quickly cut off faulty lines. They are key equipment to ensure the normal and reliable operation of power grid systems. Circuit breakers are generally composed of five parts: operating mechanism, transmission mechanism, breaking element, supporting insulator and base.

[0004] In the prior art, the transmission mechanism includes a lever and a crank slider mechanism. The output end of the lever acts as a crank, and a force or displacement is input to the input end of the lever, which is finally transmitted to the position of the slider through the crank and the connecting rod, so as to achieve the purpose of changing the force or displacement direction. Taking the displacement direction of the slider as the horizontal direction as an example, during the operation of the crank slider mechanism, the slider will have a large vertical stroke component, and at the same time generate a radial force (i.e., a force in the vertical direction). Because the direction of the radial force is perpendicular to the displacement direction of the slider, the existing transmission mechanism has the problem of unstable transmission during operation.

[0005] Therefore, how to reduce the radial force and thus improve stability is a technical problem that those skilled in the art currently need to solve. Utility Model Content

[0006] In view of this, the purpose of the utility model is to provide a multi-point displacement direction adjustment transmission mechanism to reduce radial force and thus improve stability;

[0007] Another object of the utility model is to provide a circuit breaker having the above-mentioned multi-support point adjustment displacement direction transmission mechanism.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A multi-point displacement direction adjustment transmission mechanism comprises an input device and a displacement conversion mechanism, wherein the displacement conversion mechanism comprises:

[0010] A driving rod, a first end of which is drivingly connected to the input device so as to drive the driving rod to move through the input device;

[0011] A driven connecting rod, a first end of which is hinged to the second end of the driving rod;

[0012] A slider device and a slider connecting rod, wherein a first end of the slider connecting rod is hinged to the slider device, and a second end of the slider connecting rod is hinged to a second end of the driven connecting rod;

[0013] A driving connecting rod, a first end of which is hinged to the frame, and a second end of which is hinged to the first end of the driven connecting rod;

[0014] A conversion connecting rod has a first end hinged on the frame and a second end hinged between the first end and the second end of the driven connecting rod. The driving connecting rod and the conversion connecting rod are distributed on both sides of the driven connecting rod.

[0015] Optionally, in the above-mentioned multi-point displacement direction adjustment transmission mechanism, the length of the conversion connecting rod is between one third and two thirds of the length of the driven connecting rod.

[0016] Optionally, in the above-mentioned multi-support point adjustable displacement direction transmission mechanism, the hinge point between the conversion connecting rod and the driven connecting rod is located within one third of the second end of the driven connecting rod.

[0017] Optionally, in the above-mentioned multi-support point adjustable displacement direction transmission mechanism, there are two displacement conversion mechanisms, and the driving rods of the two displacement conversion mechanisms are connected to the same input device.

[0018] Optionally, in the above-mentioned multi-point adjustable displacement direction transmission mechanism, the two displacement conversion mechanisms are symmetrically arranged, and the sliding directions of the slider devices of the two displacement conversion mechanisms are opposite.

[0019] Optionally, in the above-mentioned multi-support point adjustment displacement direction transmission mechanism, the frame is provided with a first support point and a second support point;

[0020] There are two first fulcrums, and the first ends of the driving connecting rods of the two displacement conversion mechanisms are respectively hinged to the corresponding first fulcrums;

[0021] There is one second fulcrum, and the first ends of the conversion connecting rods of the two displacement conversion mechanisms are both hinged to the second fulcrum.

[0022] Optionally, in the above-mentioned multi-support point adjustable displacement direction transmission mechanism, the driving rods of the two displacement conversion mechanisms are connected to the same input device, and the connection points are staggered.

[0023] Optionally, in the above-mentioned multi-support point adjustable displacement direction transmission mechanism, the input device is a pull rod, and the first end of the driving rod is hinged to the pull rod.

[0024] Optionally, in the above-mentioned multi-support point adjustable displacement direction transmission mechanism, the input device is a crank arm hinged on the frame, and the first end of the driving rod is hinged to the crank arm.

[0025] The multi-point displacement direction adjustment transmission mechanism provided by the utility model provides power through the input device to drive the driving rod to move upward. Since the driving rod is hinged with the driven connecting rod, the driven connecting rod will be driven to swing during the upward movement of the driving rod. The driving connecting rod and the conversion connecting rod are both hinged with the driven connecting rod, which will affect the swing trajectory of the driven connecting rod. The second end of the driven connecting rod is the output point. During the movement of the driven connecting rod, the output point performs concave circular motion around the hinge point of the conversion connecting rod and the driven connecting rod; and the hinge point of the conversion connecting rod and the driven connecting rod performs convex circular motion around the first end of the conversion connecting rod. The concave circular motion trajectory of the output point of the driven connecting rod is compensated by the convex circular motion trajectory of the hinge point of the conversion connecting rod and the driven connecting rod, and finally forms an approximate linear motion of the slider device. The utility model reduces the force in other directions outside the movement direction of the slider device, that is, reduces the radial force generated during the movement process, and improves the stability of the movement process. In addition, the slider device is an approximate linear motion, which reduces the radial displacement and can improve the running speed of the moving slider device.

[0026] A circuit breaker comprises a transmission mechanism, wherein the transmission mechanism is a multi-support point displacement direction adjustment transmission mechanism as described in any one of the above items.

[0027] The circuit breaker disclosed in the utility model has the above-mentioned multi-support point displacement direction adjustment transmission mechanism, and therefore has all the technical effects of the above-mentioned multi-support point displacement direction adjustment transmission mechanism, which will not be described in detail herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 This is a schematic structural diagram of a multi-support point displacement direction adjustment transmission mechanism disclosed in the first embodiment of the present utility model;

[0030] Figure 2 This is a schematic diagram of the structure of a multi-support point displacement direction adjustment transmission mechanism disclosed in the second embodiment of the present utility model;

[0031] Figure 3 This is a schematic diagram of the structure of the multi-support point displacement direction adjustment transmission mechanism disclosed in the third embodiment of the present utility model;

[0032] Figure 4 This is a structural schematic diagram of a multi-point displacement direction adjustment transmission mechanism disclosed in Embodiment 4 of the present utility model.

[0033] The meanings of the reference numerals in the figures are as follows:

[0034] 101 is a pull rod, 102 is a crank arm;

[0035] 201 is a slider device, 202 is a slider connecting rod, 203 is a driven connecting rod, 204 is a conversion connecting rod, 205 is a driving rod, 206 is a driving connecting rod, and 207 is a first fulcrum;

[0036] 301 is the second fulcrum. DETAILED DESCRIPTION

[0037] The core of the utility model is to provide a multi-point displacement direction adjustment transmission mechanism to reduce radial force and thus improve stability;

[0038] Another core of the utility model is to provide a circuit breaker with the above-mentioned multi-support point displacement direction adjustment transmission mechanism.

[0039] 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.

[0040] The embodiment of the utility model discloses a multi-support point displacement direction adjustment transmission mechanism, which can be applied to outdoor T-type bypass switches, column type circuit breakers and other occasions where the direction of force needs to be changed.

[0041] like Figure 1-Figure 4 As shown, the multi-point displacement direction adjustment transmission mechanism disclosed in the embodiment of the utility model includes an input device and a displacement conversion mechanism. The input device is used to realize the input of power to drive the displacement conversion mechanism to perform corresponding work. Taking the transmission mechanism for a circuit breaker as an example, the input device can drive the displacement conversion mechanism to perform corresponding switch work. The input device can be Figure 1 and Figure 2 The pull rod 101 shown has a linear motion direction. Figure 1 and Figure 2The movement direction of the pull rod 101 shown is linear movement in the vertical direction. Through the movement of the pull rod 101 in the vertical direction, the linear movement in the horizontal direction can be output through the transmission of the displacement conversion mechanism, thereby completing the corresponding switching action.

[0042] It should be noted that the input device can also be Figure 3 and Figure 4 The crank arm 102 shown is hinged on the frame so that the displacement component of the output end of the crank arm 102 in the vertical direction can be realized through the rotation of the crank arm 102, so that the linear motion in the horizontal direction can be output through the transmission of the displacement conversion mechanism, and then the corresponding switching action can be completed. Figure 4 for Figure 3 The solution after rotating 90° clockwise, where Figure 3 The scheme shown can be used for T-type bypass switches, while Figure 4 The solution shown can be used for a column type circuit breaker.

[0043] The displacement conversion mechanism may include: a driving rod 205, a driven connecting rod 203, a slider device 201, a slider connecting rod 202, a driving connecting rod 206 and a conversion connecting rod 204. The first end of the driving rod 205 is connected to the input device in a transmission manner so as to drive the driving rod 205 to move through the input device. When the input device is a pull rod 101, the pull rod 101 can be slidably matched on the frame, and the relative sliding direction between the pull rod 101 and the frame can be set to a vertical direction. It should be noted that the specific movement direction should be designed according to the application scenario.

[0044] When the input device is a crank arm 102, the crank arm 102 can be hinged on the frame, one of the rods at both ends of the hinge axis of the crank arm 102 is the output rod, and the other is the input rod. By driving the input rod, the crank arm 102 can be driven to swing around the hinge axis, and then the output rod can be driven to move. During the movement, the drive rod 205 can be driven to move (the first end of the drive rod 205 is hinged to the output rod of the crank arm 102).

[0045] The first end of the driven connecting rod 203 is hinged to the second end of the driving rod 205, the first end of the slider connecting rod 202 is hinged to the slider device 201, and the second end of the slider connecting rod 202 is hinged to the second end of the driven connecting rod 203. It should be noted that the slider device 201 needs to be provided with a corresponding guide structure on the frame according to the requirements to constrain the sliding direction of the slider device 201. For example, if the sliding direction of the slider device 201 is the horizontal direction, a corresponding guide mechanism, such as a guide rail or a guide groove structure, needs to be provided at a corresponding position along the horizontal direction so that the slider device 201 slides in a predetermined direction.

[0046] In order to constrain the swing trajectory of the driven connecting rod 203, the present embodiment further adds a driving connecting rod 206 and a conversion connecting rod 204. Among them, the first end of the driving connecting rod 206 is hinged on the frame, and the second end is hinged to the first end of the driven connecting rod 203. When the driven connecting rod 203 moves, the second end of the driving connecting rod 206 will rotate around the first end of the driving connecting rod 206. Since the second end of the driving connecting rod 206 is hinged to the first end of the driven connecting rod 203, when the driven connecting rod 203 moves, the first end of the driven connecting rod 203 will rotate around the first end of the driving connecting rod 206.

[0047] The first end of the conversion connecting rod 204 is hinged on the frame, and the second end is hinged between the first end and the second end of the driven connecting rod 203. For ease of understanding, the hinge point between the second end of the conversion connecting rod 204 and the driven connecting rod 203 is defined as a compensation point.

[0048] When the driven connecting rod 203 moves, the second end of the conversion connecting rod 204 rotates around the first end of the conversion connecting rod 204. Since the second end of the conversion connecting rod 204 is hinged between the first end and the second end of the driven connecting rod 203, when the driven connecting rod 203 moves, the compensation point of the driven connecting rod 203 rotates around the first end of the conversion connecting rod 204. The driving connecting rod 206 and the conversion connecting rod 204 are distributed on both sides of the driven connecting rod 203.

[0049] In summary, the multi-point displacement direction adjustment transmission mechanism provided by the utility model provides power through the input device to drive the driving rod 205 to move upward. Since the driving rod 205 is hinged to the driven connecting rod 203, the driven connecting rod 203 will be driven to swing during the upward movement of the driving rod 205. The driving connecting rod 206 and the conversion connecting rod 204 are both hinged to the driven connecting rod 203, which will affect the swing trajectory of the driven connecting rod 203. The second end of the driven connecting rod 203 is the output point. During the movement of the driven connecting rod 203, the output point of the driven connecting rod 203 performs a concave circular motion around the hinge point (i.e., the compensation point) between the conversion connecting rod 204 and the driven connecting rod 203. And the hinge point (i.e., the compensation point) between the conversion connecting rod 204 and the driven connecting rod 203 performs a convex circular motion around the first end of the conversion connecting rod 204.

[0050] Circular motion can be understood as point A moving in a circle around point B (i.e. the center of rotation). Concave circular motion means that point A moves in a circle around point B, and point A gradually moves in a direction lower than point B. Convex circular motion means that point A moves in a circle around point B, and point A gradually moves in a direction higher than point B.

[0051] During the movement of the driven connecting rod 203, the output point of the driven connecting rod 203 rotates around the hinge point (i.e., the compensation point) between the conversion connecting rod 204 and the driven connecting rod 203. During the rotation, the output point of the driven connecting rod 203 gradually rotates in a direction below the compensation point.

[0052] During the movement of the driven connecting rod 203, the hinge point (i.e., the compensation point) between the conversion connecting rod 204 and the driven connecting rod 203 rotates around the first end of the conversion connecting rod 204 (i.e., the hinge point between the conversion connecting rod 204 and the frame), and during the rotation, the compensation point gradually rotates in a direction lower than the first end of the conversion connecting rod 204.

[0053] It can be seen that during the movement of the driven connecting rod 203, the compensation point gradually rotates in the direction above the first end of the conversion connecting rod 204; at the same time, the output point of the driven connecting rod 203 gradually rotates in the direction below the compensation point. Therefore, when the driven connecting rod 203 swings upward, the output point of the driven connecting rod 203 rotates in the direction below the compensation point, so that the height of the output point of the driven connecting rod 203 is almost unchanged, that is, the concave circular motion trajectory of the output point of the driven connecting rod 203 is compensated by the convex circular motion trajectory of the hinge point between the conversion connecting rod 204 and the driven connecting rod 203, and finally forms an approximate linear motion of the slider device 201.

[0054] The utility model reduces the forces in directions other than the moving direction of the slider device 201, that is, reduces the radial forces generated during the movement process, and improves the stability of the movement process. In addition, the slider device 201 is approximately linear motion, which reduces the radial displacement and can increase the running speed of the slider device 201.

[0055] In a specific embodiment of the present invention, the length of the conversion connecting rod 204 is between one third and two thirds of the length of the driven connecting rod 203. The rotation radius of the compensation point is between one third and two thirds of the length of the driven connecting rod 203, and the motion component of the compensation point in the vertical direction is related to the rotation radius of the compensation point. Such a setting has been verified to ensure that the motion trajectory of the slider device 201 remains close to the same straight line.

[0056] Furthermore, the hinge point between the conversion connecting rod 204 and the driven connecting rod 203 is located within one third of the second end of the driven connecting rod 203 (i.e., the output point of the driven connecting rod 203). The motion component of the output point of the driven connecting rod 203 in the vertical direction is related to the distance from the compensation point to the output point of the driven connecting rod 203. Such a setting has been verified to ensure that the motion trajectory of the slider device 201 remains close to the same straight line.

[0057] The displacement conversion mechanism can be set to Figure 1 The two shown can also be set to Figure 2and Figure 3 1 is shown. When there are two displacement conversion mechanisms, the driving rods 205 of the two displacement conversion mechanisms can be connected to the same input device, so that the power is output through the same input device to drive the two displacement conversion mechanisms to act synchronously. If the two displacement conversion mechanisms have the same structure, the two displacement conversion mechanisms can be arranged symmetrically so that the sliding directions of the slider devices 201 of the two displacement conversion mechanisms are opposite to each other to adapt to the corresponding switch device action.

[0058] In a specific embodiment of the present invention, the frame is provided with a first fulcrum 207 and a second fulcrum 301. The first fulcrum 207 and the second fulcrum 301 can be designed as hinge supports to facilitate the installation of the driving connecting rod 206 and the conversion connecting rod 204.

[0059] The number of first fulcrums 207 can be two, and the first ends of the driving connecting rods 206 of the two displacement conversion mechanisms are respectively hinged on the corresponding first fulcrums 207. The number of second fulcrums 301 is one, and the first ends of the conversion connecting rods 204 of the two displacement conversion mechanisms are both hinged on the second fulcrum 301. The two displacement conversion mechanisms can be arranged symmetrically relative to the second fulcrum 301. It should be noted that the symmetry here is not symmetry in the strict sense, because each component of the displacement conversion mechanism has a certain thickness, and therefore cannot be installed in the same position, and the two displacement conversion mechanisms have a certain front-to-back distance in the front-to-back position. At the same time, when the driving rods 205 of the two displacement conversion mechanisms are connected to the same input device, the connection points are also staggered.

[0060] The utility model further discloses a circuit breaker, comprising the multi-support point displacement direction adjustment transmission mechanism disclosed in the above embodiment, and thus has all the technical effects of the above multi-support point displacement direction adjustment transmission mechanism, which will not be described in detail herein.

[0061] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0062] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.

[0063] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0064] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A multi-point displacement direction adjustment transmission mechanism, characterized in that: It includes an input device and a displacement conversion mechanism, and the displacement conversion mechanism includes: A driving rod (205), a first end of which is drivingly connected to the input device so as to drive the driving rod (205) to move through the input device; A driven connecting rod (203), a first end of which is hinged to the second end of the driving rod (205); A slider device (201) and a slider connecting rod (202), wherein a first end of the slider connecting rod (202) is hinged to the slider device (201), and a second end of the slider connecting rod (202) is hinged to a second end of the driven connecting rod (203); A driving connecting rod (206), a first end of which is hinged on the frame, and a second end of which is hinged to the first end of the driven connecting rod (203); A conversion connecting rod (204) has a first end hinged on the frame and a second end hinged between the first end and the second end of the driven connecting rod (203); the driving connecting rod (206) and the conversion connecting rod (204) are distributed on both sides of the driven connecting rod (203).

2. The multi-support point displacement direction adjustment transmission mechanism according to claim 1, characterized in that: The length of the conversion connecting rod (204) is between one third and two thirds of the length of the driven connecting rod (203).

3. The multi-support point displacement direction adjustment transmission mechanism according to claim 2, characterized in that: The hinge point between the conversion connecting rod (204) and the driven connecting rod (203) is located within one third of the second end of the driven connecting rod (203).

4. The multi-support point displacement direction adjustment transmission mechanism according to any one of claims 1 to 3, characterized in that: There are two displacement conversion mechanisms, and the driving rods (205) of the two displacement conversion mechanisms are connected to the same input device.

5. The multi-support point displacement direction adjustment transmission mechanism according to claim 4, characterized in that: The two displacement conversion mechanisms are symmetrically arranged, and the sliding directions of the slider devices (201) of the two displacement conversion mechanisms are opposite.

6. The multi-support point displacement direction adjustment transmission mechanism according to claim 5, characterized in that: The frame is provided with a first fulcrum (207) and a second fulcrum (301); There are two first supporting points (207), and the first ends of the driving connecting rods (206) of the two displacement conversion mechanisms are respectively hinged on the corresponding first supporting points (207); There is one second fulcrum (301), and the first ends of the conversion connecting rods (204) of the two displacement conversion mechanisms are both hinged to the second fulcrum (301).

7. The multi-support point displacement direction adjustment transmission mechanism according to claim 4, characterized in that: The driving rods (205) of the two displacement conversion mechanisms are connected to the same input device, and the connection points are staggered.

8. The multi-support point displacement direction adjustment transmission mechanism according to any one of claims 1 to 3, characterized in that: The input device is a pull rod (101), and the first end of the driving rod (205) is hinged to the pull rod (101).

9. The multi-support point displacement direction adjustment transmission mechanism according to any one of claims 1 to 3, characterized in that: The input device is a crank arm (102) hinged on the frame, and the first end of the driving rod (205) is hinged to the crank arm (102).

10. A circuit breaker, comprising a transmission mechanism, characterized in that: The transmission mechanism is a multi-point displacement direction adjustment transmission mechanism as described in any one of claims 1 to 9.

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