Stepless adjustable connecting rod structure for operating mechanism

Abstract

The utility model discloses a stepless adjustable connecting rod structure for an operating mechanism, which comprises a connecting rod, an adjusting rod, an adjusting support and a locking assembly, one end of the connecting rod is rotatably provided with a first crank arm, the adjusting support is rotatably connected with a second crank arm, and the adjusting rod penetrates through the adjusting support along the axial direction of the connecting rod and then is in threaded connection with the connecting rod. The locking assembly comprises two locking nuts connected to the adjusting rod in a threaded mode, when the adjusting rod is rotated, the adjusting rod moves relative to the connecting rod in a threaded transmission mode, so that length adjustment of the connecting rod structure is achieved, and the position of the adjusting rod is locked and fixed through the two locking nuts. According to the technical scheme, traditional pin connection between the adjusting rod and the crank arm is abandoned, the adjusting operation is convenient, the situation that operation is inconvenient due to mechanism space limitation is effectively overcome, meanwhile, stepless adjustment can be achieved through the connecting rod structure, the adjusting precision is higher, and the efficiency of adjusting and testing mechanical characteristics of the mechanism is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breaker operating mechanisms, in particular to a steplessly adjustable connecting rod structure for an operating mechanism. Background Art

[0002] Outdoor vacuum circuit breakers are used as protection and control units for power grid equipment and industrial and mining enterprise power equipment due to their strong arc extinguishing capability, long electrical life, convenient on-site maintenance, and high technical content. They are suitable for frequent operations under rated working currents, or for multiple short-circuit current interruptions. Existing vacuum circuit breakers mainly include a circuit breaker body and an operating mechanism. The operating mechanism is connected to the main shaft of the circuit breaker body through a connecting rod structure, thereby driving the circuit breaker to perform opening and closing operations. In actual production, due to differences between components and assembly errors, the overtravel of the circuit breaker is likely to be inconsistent with the design value. Therefore, it is necessary to adjust the circuit breaker after the assembly is roughly completed, and it is often necessary to adaptively adjust the length of the connecting rod structure. Existing Figure 5 The adjustable connecting rod structure described includes two output crank arms 01 and a connecting rod 03 connecting one of the output crank arms, and an adjustable rod 02 connecting the other output crank arm. The adjustable rod 02 is threadedly connected to the connecting rod 03, and the adjustable rod 02 is connected to the output crank arm through a pin shaft 04. The two ends of the pin shaft are then limited and fixed by a retaining spring 05, and connecting planes that cooperate with the output crank arms are provided on both sides of the adjustable rod 02. During the adjustment operation, the pin shaft needs to be disassembled and pulled out first, and then the output crank arm and the adjustable rod are separated, and then the adjustable rod can be rotated. However, the adjustable rod can only be rotated and adjusted based on 0.5 turns, otherwise the connecting plane and the crank arm will not be able to match and contact each other, and there are adjustment limitations. The entire adjustment operation process is cumbersome and complicated, and the adjustment is extremely inconvenient. In addition, the internal space of the operating mechanism is originally small, and such a design is not convenient for disassembly and assembly of the connecting rod structure, thereby reducing the efficiency of the mechanical property adjustment test of the operating mechanism. Utility Model Content

[0003] Therefore, the technical problem to be solved by the utility model is to overcome the problem that the adjustable rod in the prior art needs to be adjusted after the pin shaft and the crank arm are disassembled, and can only be rotated and adjusted based on 0.5 circles. The adjustment process is cumbersome and complicated, the adjustment is not convenient, and the work efficiency is reduced.

[0004] In order to solve the above technical problems, the utility model provides a stepless adjustable connecting rod structure for an operating mechanism, comprising:

[0005] A connecting rod, one end of which is rotatably provided with a first crank arm;

[0006] An adjusting support is rotatably connected to the second crank arm;

[0007] An adjusting rod, which passes through the adjusting support along the axial direction of the connecting rod and is threadedly connected to the connecting rod, so that the adjusting rod can move axially relative to the connecting rod when it rotates;

[0008] The locking assembly includes two locking nuts threadedly connected to the adjusting rod and located between the adjusting support and the connecting rod. When locked, the two locking nuts respectively abut against the adjusting support and the connecting rod to keep the relative position between the adjusting rod and the connecting rod fixed.

[0009] As a preferred solution, the other end of the connecting rod is provided with a threaded hole along its axial extension, and the adjusting rod includes a screw portion connected to the threaded hole.

[0010] As a preferred solution, the adjusting support is provided with a through hole structure through which the screw rod can pass, and two ends of the through hole structure are respectively provided through the front end surface and the rear end surface of the adjusting support.

[0011] As a preferred solution, two locking nuts are connected to the screw rod portion, and a gasket assembly is provided between the adjusting support and the connecting rod respectively.

[0012] As a preferred embodiment, the adjusting rod also includes a limiting head arranged at the end of the screw portion away from the connecting rod, the limiting head cooperates and abuts against the front end surface of the adjusting support, and the limiting head is provided with an operating groove suitable for a tool to operate the rotation of the adjusting rod.

[0013] As a preferred solution, the adjustment support is in a square shape and has two circular shafts on its left and right sides, and the two connecting plates of the second crank arm are rotatably connected to the two circular shafts.

[0014] As a preferred solution, the adjustment support is installed and connected between two connecting plates of the second crank arm, and the second crank arm includes a crank arm shaft detachably connected to the two connecting plates.

[0015] As a preferred solution, the first crank arm is connected to one end of the connecting rod through a pin shaft, the connecting rod and the first crank arm are respectively provided with pin holes for the pin shaft to pass through, and two elastic stoppers are provided at both ends of the pin shaft to limit the pin shaft from escaping from the pin hole.

[0016] As a preferred solution, the connecting rod, the adjusting rod and the two crank arms are connected and accommodated in a mounting cavity formed by the mechanism plate assembly, and the limiting head of the adjusting rod faces one end of the mounting cavity.

[0017] Compared with the prior art, the technical solution of the utility model has the following advantages:

[0018] 1. In the steplessly adjustable connecting rod structure for the operating mechanism provided by the utility model, the connecting rod and the adjusting support are rotatably connected to the first crank arm and the second crank arm respectively, and then the adjusting rod is passed through the adjusting support and connected to the connecting rod by a thread. When adjusting the length, the adjusting rod can be rotated by a tool such as an Allen wrench, so that the adjusting rod moves relative to the connecting rod through a threaded transmission, thereby realizing the length adjustment of the connecting rod structure. After the adjustment is completed, it is only necessary to lock and fix the position of the adjusting rod with two locking nuts. The advantage of adopting this technical solution is that the traditional pin connection between the adjusting rod and the crank arm is abandoned, avoiding the tedious process of disassembling and assembling the pin for each adjustment. The adjustment operation is convenient, and the inconvenience caused by the space limitation of the mechanism is effectively overcome. At the same time, this connecting rod structure can realize stepless adjustment with higher adjustment accuracy, which greatly improves the efficiency of the mechanical characteristic adjustment test of the mechanism.

[0019] 2. In the steplessly adjustable connecting rod structure for the operating mechanism provided by the utility model, according to the square shape of the adjusting support and the two circular shafts on its left and right sides, the two connecting plates of the second crank arm are rotatably connected to the two circular shafts, thereby realizing the rotational connection between the second crank arm and the adjusting support, and the screw portion of the adjusting rod is passed through the through-hole structure of the adjusting support and then threadedly connected with the connecting rod. The advantage of such a design is that the adjusting support plays a guiding connection and supporting role for the adjusting rod, so that the adjusting rod and the second crank arm can be installed independently without interfering with each other. Therefore, when adjusting the length between the adjusting rod and the connecting rod, there is no need to disassemble the second crank arm, and the adjusting rod is displaced relative to the connecting rod under the action of the thread by rotating the adjusting rod, thereby realizing the purpose of adjusting the length of the connecting rod structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the drawings required for use in the specific implementation or the description of the prior art will be briefly introduced below.

[0021] Figure 1 It is a three-dimensional structural schematic diagram of a stepless adjustable connecting rod structure for the operating mechanism of the utility model;

[0022] Figure 2 for Figure 1 A partial enlarged structural diagram of a steplessly adjustable connecting rod structure for the operating mechanism shown;

[0023] Figure 3 It is a structural schematic diagram of the adjustment support of the utility model;

[0024] Figure 4 It is a schematic diagram of the installation structure of the stepless adjustable connecting rod structure for the operating mechanism of the utility model;

[0025] Figure 5The figure is a schematic diagram of an adjustable connecting rod structure in the prior art.

[0026] Explanation of the accompanying drawings: 1. connecting rod; 2. adjusting rod; 21. screw rod portion; 22. limiting head; 23. operating groove; 3. adjusting support; 31. through hole structure; 32. round shaft; 4. locking nut; 5. first crank arm; 51. pin shaft; 52. elastic stop card; 6. second crank arm; 61. second connecting plate; 7. gasket assembly; 8. mechanism plate assembly. DETAILED DESCRIPTION

[0027] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0028] In the description of the present utility model, it should be noted that the terms "first", "second" and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Example

[0031] The present embodiment is described in detail below with reference to the accompanying drawings:

[0032] This embodiment provides Figure 1-4The illustrated embodiment shows a steplessly adjustable connecting rod structure for an operating mechanism, comprising a connecting rod 1, an adjusting rod 2, an adjusting support 3, a locking assembly, a first crank arm 5 and a second crank arm 6, wherein the first crank arm 5 is used to connect the mechanism shaft for outputting kinetic energy of the operating mechanism, and the second crank arm 6 is used to connect the main shaft part of the circuit breaker, a first crank arm 5 is rotatably provided on one end of the connecting rod 1, and the adjusting support 3 is rotatably connected to the second crank arm 6; the adjusting rod 2 passes through the adjusting support 3 along the axial direction of the connecting rod 1 and is threadedly connected to the connecting rod 1, so that the adjusting rod 2 can move axially relative to the connecting rod 1 when rotating; the locking assembly comprises two locking nuts 4 threadedly connected to the adjusting rod 2 and located between the adjusting support 3 and the connecting rod 1, and the two locking nuts 4 respectively abut against the adjusting support 3 and the connecting rod 1 when locked, and keep the relative position between the adjusting rod 2 and the connecting rod 1 fixed.

[0033] The above implementation mode is the core technical scheme of this embodiment. During installation, the connecting rod 1 and the adjustment support 3 are rotatably connected to the first crank arm 5 and the second crank arm 6 respectively, and then the adjusting rod 2 is passed through the adjusting support 3 and connected to the connecting rod 1 through a thread. When adjusting the length, the adjusting rod 2 can be rotated by a tool such as an Allen wrench, so that the adjusting rod 2 moves relative to the connecting rod 1 through a threaded transmission, thereby realizing the length adjustment of the connecting rod structure. After the adjustment is completed, only two locking nuts 4 are needed to lock and fix the position of the adjusting rod. The advantage of adopting this technical scheme is that the traditional pin connection between the adjusting rod and the crank arm is abandoned, avoiding the tedious process of disassembling and assembling the pin for each adjustment. The adjustment operation is convenient, and the inconvenience caused by the space limitation of the mechanism is effectively overcome. At the same time, this connecting rod structure can realize stepless adjustment with higher adjustment accuracy, which greatly improves the efficiency of the mechanical property adjustment test of the mechanism.

[0034] It is further preferred that the other end of the connecting rod 1 is provided with a threaded hole extending along its axial direction, the adjusting rod 2 includes a screw portion 21 connected to the threaded hole, and the adjusting support 3 is penetrated by a through hole structure 31 for the screw portion 21 to pass through. In the above-mentioned arrangement, the screw portion 21 is connected to the threaded hole after passing through the through hole structure 31, and the adjusting rod 2 can slide back and forth relative to the connecting rod 1 through the threaded connection, and the adjustment process is simpler, more convenient and more reliable.

[0035] like Figure 1-3As shown, the two ends of the through hole structure 31 are respectively set through the front end face and the rear end face of the adjusting support 3, and two locking nuts 4 are connected to the screw part 21. When one locking nut 4 is tightened, it is matched and abutted on the rear end face of the adjusting support 3, and when the other locking nut 4 is tightened, it is matched and abutted on the other end of the connecting rod 1. A gasket assembly 7 is respectively arranged between the two locking nuts 4 and the adjusting support 3 and the connecting rod 1. The gasket assembly 7 is mainly composed of a spring washer and a flat washer. The gasket assembly 7 plays a role of preventing loosening and protection: after tightening the locking nut, the gasket assembly 7 gives the nut an elastic force, tightens the locking nut so that it is not easy to fall off, and increases the contact area, which can protect the connecting rod 1 and the adjusting support 3 from damage, and can also improve the fatigue strength of the locking nut connection, thereby reducing the stress amplitude and reducing the fatigue damage of the connecting parts. In this structural setting, the two locking nuts 4 are tightened and pressed against the adjusting support 3 and the connecting rod 1, and the adjusting rod 2 can be prevented from rotating again after the two locking nuts 4 are locked, thereby ensuring that the length of the connecting rod structure after adjustment will not change at will.

[0036] Combination Figure 1 and Figure 3 As shown, the two ends of the through hole structure 31 are respectively penetrated and arranged on the front end face and the rear end face of the adjustment support 3, and the adjustment rod 2 also includes a limit head 22 arranged on the end of the screw portion 21 away from the connecting rod 1. The width of the limit head 22 is greater than the aperture of the through hole structure 31 and cannot pass through the through hole structure 31. Therefore, during installation, the limit head 22 cooperates and abuts against the front end face of the adjustment support 3. The limit head is provided with an operating groove 23 suitable for tools to operate the rotation of the adjustment rod 2. The operating groove 23 can preferably be a hexagonal groove, a cross groove, or a slotted groove. Reference Figure 4 It can be seen that the connecting rod 1, the adjusting rod 2 and the two crank arms are connected and accommodated in the installation cavity formed by the mechanism plate assembly 8, and the limiting head of the adjusting rod 2 faces one end of the installation cavity, which is convenient for the staff to adjust and operate the adjusting rod 2 at one end of the installation cavity, and the operating space is also relatively sufficient. With this structural setting, when adjusting, first loosen the two locking nuts 4, and then use the corresponding tools such as the hexagonal wrench to rotate the adjusting rod 2 to achieve the function of adjusting the length of the connecting rod structure. There is no need to disassemble the crank arm to complete the adjustment, and the adjustment and operation are convenient, thereby improving the working effect.

[0037] Combine the following Figure 1-3 The specific setting method of the first crank arm and the second crank arm is described in detail:

[0038] The adjusting support 3 is in the shape of a square and is provided with two circular shafts 32 on its left and right sides. The two second connecting plates 61 of the second crank arm 6 are rotatably connected to the two circular shafts 32. The adjusting support 3 is connected between the two second connecting plates 61 of the second crank arm 6. The second crank arm 6 includes a crank arm shaft fixedly connected to the two second connecting plates 61. Specifically, the crank arm shaft and the two second connecting plates 61 are detachably connected, or the two second connecting plates 61 are first connected to the two circular shafts 32, and then the two second connecting plates 61 are welded to the crank arm shaft. In this way, the installation design can realize the second The crank arm 6 is rotatably connected to the adjustment support 3, and the screw portion 21 of the adjustment rod 2 is passed through the through-hole structure 31 of the adjustment support 3 and then threadedly connected to the connecting rod 1. The advantage of such a design is that the adjustment support 3 plays a guiding connection and supporting role for the adjustment rod 2, so that the adjustment rod 2 and the second crank arm 6 can be installed independently without interfering with each other. Therefore, when adjusting the length between the adjustment rod 2 and the connecting rod 1, there is no need to disassemble the second crank arm 6. By rotating the adjustment rod 2, the adjustment rod 2 is displaced relative to the connecting rod 1 under the action of the thread, thereby achieving the purpose of adjustable length of the connecting rod structure.

[0039] It is further preferred that the first crank arm 5 is connected to one end of the connecting rod 1 through a pin shaft 51, and the connecting rod 1 and the first crank arm 5 are respectively provided with pin holes for the pin shaft 51 to pass through, and two elastic stop cards 52 are provided at both ends of the pin shaft 51 to limit the pin shaft 51 from disengaging from the pin hole, so that the two elastic stop cards 52 form a limiting fit with the two ends of the pin shaft 51, that is, the two ends of the pin shaft 51 are respectively provided with limiting card grooves for the two elastic stop cards 52 to be inserted. It can be seen that the connecting rod 1 and the first crank arm 5 are still connected in a pin shaft manner, which is convenient for installation and connection, and the elastic stop card 52 is used to limit the axial displacement movement of the pin shaft 51, thereby ensuring the stability and reliability of the installation connection between the connecting rod 1 and the first crank arm 5.

[0040] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A steplessly adjustable connecting rod structure for an operating mechanism, characterized in that: include: A connecting rod (1), one end of which is rotatably provided with a first crank arm (5); An adjusting support (3) is rotatably connected to the second crank arm (6); An adjusting rod (2) passes through an adjusting support (3) along the axial direction of the connecting rod (1) and is threadedly connected to the connecting rod (1), so that the adjusting rod (2) can move axially relative to the connecting rod (1) when the adjusting rod (2) rotates; The locking assembly comprises two locking nuts (4) which are threadedly connected to the adjusting rod (2) and are located between the adjusting support (3) and the connecting rod (1). When locked, the two locking nuts (4) respectively abut against the adjusting support (3) and the connecting rod (1) to keep the relative position between the adjusting rod (2) and the connecting rod (1) fixed.

2. According to claim 1, a steplessly adjustable connecting rod structure for an operating mechanism, characterized in that: The other end of the connecting rod (1) is provided with a threaded hole extending along its axial direction, and the adjusting rod (2) comprises a screw rod portion (21) connected to the threaded hole.

3. According to claim 2, a steplessly adjustable connecting rod structure for an operating mechanism, characterized in that: The adjusting support (3) is penetrated at the front and rear by a through hole structure (31) through which the screw rod (21) can pass, and the two ends of the through hole structure (31) are respectively penetrated by the front end surface and the rear end surface of the adjusting support (3).

4. The steplessly adjustable connecting rod structure for an operating mechanism according to claim 3, characterized in that: Two locking nuts (4) are connected to the screw rod portion (21), and a gasket assembly (7) is provided between the adjusting support (3) and the connecting rod (1) respectively.

5. A steplessly adjustable connecting rod structure for an operating mechanism according to any one of claims 2 to 4, characterized in that: The adjusting rod (2) further comprises a limit head (22) arranged at the end of the screw rod (21) away from the connecting rod (1), the limit head (22) being in contact with the front end surface of the adjusting support (3), and an operating groove (23) suitable for a tool to operate the adjusting rod (2) to rotate is arranged on the limit head.

6. The steplessly adjustable connecting rod structure for an operating mechanism according to claim 5, characterized in that: The adjustment support (3) is in a square shape and is provided with two circular shafts (32) on its left and right side surfaces. The two connecting plates of the second crank arm (6) are rotatably connected to the two circular shafts (32).

7. The steplessly adjustable connecting rod structure for an operating mechanism according to claim 6, characterized in that: The adjustment support (3) is connected between two second connecting plates (61) of the second crank arm (6), and the second crank arm (6) comprises a crank arm shaft fixedly connected to the two second connecting plates (61).

8. The steplessly adjustable connecting rod structure for an operating mechanism according to claim 7, characterized in that: The first crank arm (5) is connected to one end of the connecting rod (1) via a pin shaft (51); the connecting rod (1) and the first crank arm (5) are respectively provided with pin holes for the pin shaft (51) to pass through, and two elastic stoppers (52) are provided at both ends of the pin shaft (51) for limiting the pin shaft (51) from escaping from the pin holes.

9. A steplessly adjustable connecting rod structure for an operating mechanism according to any one of claims 6 to 8, characterized in that: The connecting rod (1), the adjusting rod (2) and the two crank arms are connected and accommodated in a mounting cavity formed by a mechanism plate assembly (8), and the limiting head of the adjusting rod (2) faces one end of the mounting cavity.

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