A transmission device for a fast earthing switch operating mechanism

Abstract

The utility model belongs to the technical field of quick earthing switch operating mechanism, specifically, a transmission device for quick earthing switch operating mechanism, including an operating mechanism main body frame, a motor, an output shaft, a spring and a transmission assembly, and the transmission assembly includes a worm, a worm wheel, a worm wheel shaft, a spring connecting crank arm, a shift fork limiting sleeve, a stop pin, and a shift fork. The utility model can realize the quick opening and closing of the quick earthing switch through the coordinated arrangement of the operating mechanism main body frame, the motor, the output shaft, the spring and the transmission assembly, and has a more rapid response, a compact structure, and is easy to install and maintain, thereby improving work efficiency and safety. The utility model can achieve the function of limiting the axial movement of the shift fork through the coordinated arrangement of the two stop pin mounting arms on the shift fork limiting sleeve and the axial limit groove of the shift fork, thereby ensuring that the output shaft connected to the shift fork will not undergo a large axial movement, and ensuring that the output shaft can normally drive the quick earthing switch body to move after long-term use, and has higher reliability.

Description

Technical Field

[0001] The utility model belongs to the technical field of a fast grounding switch operating mechanism, in particular to a transmission device used for a fast grounding switch operating mechanism. Background Art

[0002] A fast earthing switch is a device that has the ability to close short-circuit current and is specially used for fast grounding of power systems. In a fast earthing switch, an operating mechanism is usually provided to achieve fast and reliable closing and opening operations.

[0003] In the current operating mechanism, the output shaft connected to the rapid earthing switch body is generally driven by a driving member to rotate. During the closing and opening operation, the output shaft will be frequently affected by the elastic force of the energy storage member (spring, etc.) in the operating mechanism, which may easily cause the output shaft to move axially to a large extent, or even cause the output shaft to get stuck due to axial misalignment, thereby affecting the normal operation of the rapid earthing switch body driven by the output shaft. Summary of the invention

[0004] In view of the above problems, the purpose of the present utility model is to provide a transmission device for a fast earthing switch operating mechanism.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A transmission device for a fast earthing switch operating mechanism, comprising an operating mechanism main body frame, a motor, an output shaft, a spring and a transmission assembly, wherein the motor is mounted on the operating mechanism main body frame, one end of the spring is connected to one end of a spring mounting member, the operating mechanism main body frame is provided with an articulated seat articulated to the other end of the spring mounting member, and the transmission assembly comprises a worm, a worm wheel, a worm wheel shaft, a spring connecting crank arm, a shift fork limiting sleeve, a stop pin and a shift fork;

[0007] One end of the worm is rotatably connected to the main frame of the operating mechanism, and the other end is connected to the output end of the motor. Both ends of the worm gear shaft are rotatably arranged on the main frame of the operating mechanism. The worm gear, the spring connecting crank arm and the shift fork limiting sleeve are fixedly installed on the worm gear shaft in sequence along the axial direction of the worm gear shaft. The worm gear is meshed with the worm gear. The spring connecting crank arm is hinged to one end of another spring mounting member, and the other end of the other spring mounting member is connected to the other end of the spring.

[0008] One end of the shift fork is connected to the output shaft, and the other end of the shift fork is provided with a stop pin insertion groove, and the shift fork limit sleeve is provided with a shift fork axial limit groove, and a stop pin mounting arm is protruded on the shift fork limit sleeve and on both sides of the shift fork axial limit groove, and the setting positions of the two stop pin mounting arms correspond to each other, and the stop pin passes through the two stop pin mounting arms respectively, and the stop pin located between the two stop pin mounting arms is in the stop pin insertion groove, and the shift fork is inserted between the two stop pin mounting arms and extends into the shift fork axial limit groove, and the width of the shift fork axial limit groove matches the thickness of the shift fork extending into the shift fork axial limit groove.

[0009] Preferably, a buffer for blocking a stop pin mounting arm is respectively provided on the main frame of the operating mechanism and on both sides of the axial direction of the worm gear shaft, one of the buffers abuts against the same side of the two stop pin mounting arms when the quick earthing switch is in the open position, and the other buffer abuts against the other side of the two stop pin mounting arms when the quick earthing switch is in the closed position.

[0010] Preferably, the axial center line of the worm gear shaft and the axial center line of the output shaft are parallel to each other.

[0011] Preferably, a projection of the axial center line of the spring on a horizontal plane and a projection of the axial center line of the worm gear shaft on a horizontal plane are perpendicular to each other.

[0012] Preferably, the motor and the output shaft are both located on the upper side or the lower side of the worm gear shaft.

[0013] The beneficial effects of the utility model are:

[0014] 1. The utility model can realize fast opening and closing of the fast earthing switch through the coordinated arrangement of the operating mechanism main body frame, motor, output shaft, spring and transmission components including worm, worm wheel, worm wheel shaft, spring connecting crank arm, fork limit sleeve, stop pin and fork, with faster response, compact structure, easy installation and maintenance, and improved work efficiency and safety.

[0015] 2. The utility model can limit the axial movement of the shift fork through the coordinated arrangement of the two stop pin mounting arms on the shift fork limit sleeve and the shift fork axial limit groove, thereby ensuring that the output shaft connected to the shift fork will not undergo a large axial movement, ensuring that the output shaft can normally drive the quick earthing switch body to operate after long-term use, and having higher reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is one of the three-dimensional structural schematic diagrams of the utility model when it is in the open position;

[0017] Figure 2 This is the second schematic diagram of the three-dimensional structure of the utility model when it is in the open position;

[0018] Figure 3 It is a schematic diagram of the structure of the utility model when it is in the open position;

[0019] Figure 4 This is one of the three-dimensional structural schematic diagrams of the utility model when it is in the closed position;

[0020] Figure 5 This is the second schematic diagram of the three-dimensional structure of the utility model when it is in the closed position;

[0021] Figure 6 It is a schematic diagram of the structure of the utility model when it is in the closed position;

[0022] Figure 7 for Figure 2 A magnified image of point A;

[0023] Figure 8 for Figure 5 Enlarged view of point B.

[0024] In the figure: 1 is the main frame of the operating mechanism, 101 is the hinge seat, 2 is the motor, 3 is the output shaft, 4 is the spring, 5 is the spring mounting part, 6 is the worm, 7 is the worm wheel, 8 is the worm wheel shaft, 9 is the spring connecting crank arm, 10 is the shift fork limiting sleeve, 1001 is the shift fork axial limiting groove, 1002 is the stop pin mounting arm, 11 is the stop pin, 12 is the shift fork, 1201 is the stop pin insertion groove, and 13 is the buffer. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-8 The utility model is further described in detail.

[0026] A transmission device for a fast earthing switch operating mechanism, such as Figure 1-8 As shown, the present embodiment includes an operating mechanism main frame 1, a motor 2, an output shaft 3, a spring 4 and a transmission assembly, wherein the motor 2 is mounted on the operating mechanism main frame 1, one end of the spring 4 is connected to one end of a spring mounting member 5, and the operating mechanism main frame 1 is provided with a hinge seat 101 hingedly connected to the spring mounting member 5 and the main frame 1. Specifically, the transmission assembly in the present embodiment includes a worm 6, a worm wheel 7, a worm wheel shaft 8, a spring connecting crank arm 9, a shift fork limiting sleeve 10, a stop pin 11, and a shift fork 12. The connection structure between the spring 4 and the spring mounting member 5 in the present embodiment is prior art. The motor 2 in the present embodiment adopts a commercially available servo motor product, and the action is controlled by an external controller to ensure accurate action.

[0027] One end of the worm 6 is rotatably connected to the operating mechanism main frame 1, and the other end is connected to the output end of the motor 2. Both ends of the worm gear shaft 8 are rotatably arranged on the operating mechanism main frame 1. In order to facilitate the display of the specific structure of the operating mechanism, the specific connection structure of the operating mechanism main frame 1, the motor 2 and the worm gear shaft 8 is hidden in the drawings of the specification. In this embodiment, the arrangement structure of the motor 2, the output shaft 3, the worm 6 and the operating mechanism main frame 1 are all prior art; the output shaft 3 is connected to the fast earthing switch body, and the connection structure is also prior art.

[0028] The worm wheel 7, the spring connecting crank arm 9 and the shift fork limiting sleeve 10 are fixedly installed on the worm wheel rotating shaft 8 in sequence along the axial direction of the worm wheel rotating shaft 8, the worm wheel 7 is meshed with the worm 6, the spring connecting crank arm 9 is hinged to one end of another spring mounting member 5, and the other end of the other spring mounting member 5 is connected to the other end of the spring 4. In this embodiment, the installation and fixing structure of the worm wheel 7, the spring connecting crank arm 9 and the shift fork limiting sleeve 10 and the worm wheel rotating shaft 8 are all prior arts.

[0029] One end of the shift fork 12 is connected to the output shaft 3, and the other end of the shift fork 12 is provided with a stop pin insertion groove 1201, and the shift fork limit sleeve 10 is provided with a shift fork axial limit groove 1001, and a stop pin mounting arm 1002 is protruded on the shift fork limit sleeve 10 and on both sides of the shift fork axial limit groove 1001, and the setting positions of the two stop pin mounting arms 1002 correspond to each other, and the stop pin 11 passes through the two stop pin mounting arms 1002 respectively, and the stop pin 11 located between the two stop pin mounting arms 1002 is in the stop pin insertion groove 1201, and the shift fork 12 penetrates between the two stop pin mounting arms 1002 and extends into the shift fork axial limit groove 1001, and the width of the shift fork axial limit groove 1001 matches the thickness of the shift fork 12 extending into the shift fork axial limit groove 1001.

[0030] In this embodiment, when performing the closing operation, Figure 4-6 As shown, the motor 2 starts and drives the connecting worm 6 to rotate, the worm 6 drives the worm wheel 7 to rotate, the worm wheel 7 drives the worm wheel shaft 8 which is also equipped with a spring connecting crank arm 9 and a shift fork limiting sleeve 10 to rotate; the rotation of the spring connecting crank arm 9 drives the spring 4 to compress and store energy and rotate around the hinge seat 101; when the spring connecting crank arm 9 rotates to the dead point, the spring 4 is completely compressed, the spring connecting crank arm 9 continues to rotate under the action of inertia, and quickly releases energy, driving the spring connecting crank arm 9 to rotate quickly, the spring connecting crank arm 9 drives the worm wheel shaft 8 to rotate, the worm wheel shaft 8 drives the shift fork limiting sleeve 10 to rotate and drives the shift fork 12 to rotate quickly through the stop pin 11, thereby driving the output shaft 3 to rotate quickly. In this embodiment, when the opening operation is performed, Figure 1-3 As shown, at this time, the motor 2 rotates in the reverse direction and the output shaft 3 rotates in the reverse direction quickly.

[0031] like Figure 7 As shown, through the coordinated arrangement of the two stop pin mounting arms 1002 and the fork axial limit groove 1001 on the fork limit sleeve 10, and the width of the fork axial limit groove 1001 matches the thickness of the fork 12 extending into the fork axial limit groove 1001, the fork 12 can be always blocked by the fork axial limit groove 1001 or the stop pin mounting arm 1002 on the side during the driven rotation process, thereby achieving the effect of limiting the axial movement of the fork 12, thereby ensuring that the output shaft 3 connected to the fork 12 will not undergo large axial movement, and ensuring that the output shaft 3 can normally drive the quick grounding switch body to operate after long-term use.

[0032] Specifically, in this embodiment, a buffer 13 for blocking the stop pin mounting arm 1002 is respectively provided on the main frame 1 of the operating mechanism and on both sides of the axial direction of the worm gear shaft 8. One of the buffers 13 abuts against the same side of the two stop pin mounting arms 1002 when the fast earthing switch is in the open position, and the other buffer 13 abuts against the other side of the two stop pin mounting arms 1002 when the fast earthing switch is in the closed position. In this embodiment, the buffers 13 are all commercially available hydraulic buffer products. Through the provision of two buffers 13, the two stop pin mounting arms 1002 can be blocked respectively when the closing or opening is near the end, and the kinetic energy obtained by the stop pin mounting arms 1002 can be absorbed, so that the output shaft 3 and the connected fast earthing switch body can quickly change from a high-speed motion state to a static state, so as to ensure the reliable operation of the operating mechanism.

[0033] Specifically, in this embodiment, the axial center line of the worm gear shaft 8 is parallel to the axial center line of the output shaft 3, and the projection of the axial center line of the spring 4 on the horizontal plane is perpendicular to the projection of the axial center line of the worm gear shaft 8 on the horizontal plane, which is convenient for installation and reliable operation. In this embodiment, the motor 2 and the output shaft 3 are both located on the upper side of the worm gear shaft 8, making the structure more compact and saving the overall space occupied by the operating mechanism.

Claims

1. A transmission device for a fast earthing switch operating mechanism, comprising an operating mechanism main frame (1), a motor (2), an output shaft (3), a spring (4) and a transmission assembly, wherein the motor (2) is mounted on the operating mechanism main frame (1), and spring mounting members (5) are provided at both ends of the spring (4), and one end is hinged to a hinge seat (101) fixedly mounted on the main frame (1) through the spring mounting member (5), characterized in that: The transmission assembly comprises a worm (6), a worm wheel (7), a worm wheel shaft (8), a spring connecting crank arm (9), a shift fork limiting sleeve (10), a stop pin (11), and a shift fork (12); One end of the worm (6) is rotatably connected to the operating mechanism main body frame (1), and the other end is connected to the output end of the motor (2); a worm gear shaft (8) is rotatably arranged on the operating mechanism main body frame (1); a worm gear (7), a spring connecting crank arm (9) and a shift fork limiting sleeve (10) are sequentially fixedly installed on the worm gear shaft (8) along the axial direction of the worm gear shaft (8); the worm gear (7) is meshed with the worm (6); the other end of the spring (4) is hinged to the spring connecting crank arm (9) through a spring mounting member (5); One end of the shift fork (12) is connected to the output shaft (3), the other end of the shift fork (12) is provided with a stop pin insertion groove (1201), the shift fork limit sleeve (10) is provided with a shift fork axial limit groove (1001), a stop pin installation arm (1002) is protruded on the shift fork limit sleeve (10) and on both sides of the shift fork axial limit groove (1001), the two stop pin installation arms (1002) are arranged at positions corresponding to each other, and the stop pin (11) passes through Two stop pin mounting arms (1002), a stop pin (11) located between the two stop pin mounting arms (1002) is in a stop pin insertion groove (1201), a shift fork (12) is inserted between the two stop pin mounting arms (1002) and extends into the shift fork axial limit groove (1001), and the width of the shift fork axial limit groove (1001) matches the thickness of the shift fork (12) extending into the shift fork axial limit groove (1001).

2. A transmission device for a fast earthing switch operating mechanism according to claim 1, characterized in that: A buffer (13) for blocking the stop pin mounting arms (1002) is respectively provided on the main frame (1) of the operating mechanism and on both sides of the axial direction of the worm gear shaft (8), wherein one buffer (13) abuts against the same side of the two stop pin mounting arms (1002) when the quick earthing switch is in the open position, and the other buffer (13) abuts against the other side of the two stop pin mounting arms (1002) when the quick earthing switch is in the closed position.

3. A transmission device for a fast earthing switch operating mechanism according to claim 1, characterized in that: The axial center line of the worm gear shaft (8) and the axial center line of the output shaft (3) are parallel to each other.

4. A transmission device for a fast earthing switch operating mechanism according to claim 1, characterized in that: The projection of the axial center line of the spring (4) on the horizontal plane and the projection of the axial center line of the worm gear shaft (8) on the horizontal plane are perpendicular to each other.

5. The transmission device for a fast earthing switch operating mechanism according to claim 1, characterized in that: The motor (2) and the output shaft (3) are both located on the upper side or the lower side of the worm gear shaft (8).

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