Bidirectional ratchet clutch and ring main unit

Abstract

The application relates to a bidirectional ratchet clutch and a ring main unit. The bidirectional ratchet clutch comprises a clutch support, a ratchet gear, a top block, an input assembly and an output shaft. The clutch support is provided with at least two mounting grooves on the outer circumferential surface. The ratchet gear is sleeved outside the clutch support, and the inner circumferential surface of the ratchet gear is provided with ratchet teeth. At least two top blocks are correspondingly mounted in the at least two mounting grooves. The top block comprises an engagement part capable of being clamped on the ratchet teeth, and the engagement part can move along the radial direction of the clutch support. The input assembly comprises an input shaft and a pressure contact piece connected with each other. The input shaft is connected with the clutch support, and the pressure contact piece is at least partially located on the side of the top block away from the input shaft along the radial direction. The output shaft is connected with the clutch support.

Description

Technical Field

[0001] This application relates to the field of ring main unit drive technology, and in particular to a bidirectional ratchet clutch and a ring main unit. Background Technology

[0002] With the continuous improvement of the automation level of power distribution networks, the demand for remote "remote control" operation of power distribution equipment such as ring main units is becoming increasingly urgent. Therefore, it is necessary to add electric operating mechanisms to existing manually operated ring main units to achieve remote control functionality.

[0003] In the practical application of upgrading ring main units (such as Areva FBX-C type), it was found that the existing electric operating mechanism has inherent defects. First, when the electric operating mechanism is damaged, it cannot be replaced separately on site; both the manual and electric operating mechanisms must be replaced as a whole, resulting in high maintenance costs and long repair times. Second, during distribution network automation upgrades, due to the lack of original factory-specific tooling and fixtures on site, construction personnel cannot install the electric operating mechanism separately; again, both the manual and electric operating mechanisms must be replaced as a whole, making the upgrade work cumbersome, inefficient, and expensive. Furthermore, after installing the electric operating mechanism, the original manual operating mechanism's handle socket becomes invalid. Emergency manual operation requires the use of a special crank at the motor end, which is inconvenient and requires driving the entire motor and gearbox during manual cranking, resulting in significant resistance.

[0004] The existing electric operation scheme for ring main units has the problem that the manual and electric operation mechanisms must be completely replaced when it is modified or repaired, which leads to complicated construction, high costs, and inconvenience of the modified manual operation mechanism. Summary of the Invention

[0005] Therefore, it is necessary to provide a two-way ratchet clutch and ring main unit to address the problem of mutual interference between existing electric and manual operation.

[0006] This application provides a two-way ratchet clutch, the two-way ratchet clutch comprising:

[0007] The clutch support has at least two mounting slots on its outer circumferential surface;

[0008] A ratchet gear is sleeved on the outside of the clutch support, and ratchet teeth are provided on the inner circumferential surface of the ratchet gear;

[0009] At least two top blocks are installed in the at least two mounting slots in a one-to-one correspondence. Each top block includes a meshing part that can engage with the ratchet teeth. The meshing part can move radially along the clutch support.

[0010] An input assembly includes a connected input shaft and a press-fit member, the input shaft being connected to the clutch support, and the press-fit member being at least partially located on a side of the top block facing away from the input shaft along the radial direction;

[0011] The output shaft is connected to the clutch support;

[0012] The bidirectional ratchet clutch has a first transmission state and a second transmission state. When it is in the first transmission state, the meshing part engages with the ratchet teeth. The ratchet gear is configured to drive rotation so that the ratchet teeth push at least one of the top blocks to rotate, thereby driving the clutch support and the output shaft to rotate synchronously.

[0013] When in the second transmission state, the input shaft is configured to be pressed in axially along the clutch support, so that the press-fit member is pressed onto the engagement portion, thereby disengaging the engagement portion from the ratchet teeth. The input shaft is configured to rotate so that the press-fit member drives the top block to drive the clutch support and the output shaft to rotate synchronously.

[0014] In one embodiment, the bidirectional ratchet clutch further includes a radial elastic element disposed in the mounting groove, the radial elastic element being used to provide an outward elastic force along the radial direction to engage the engagement portion with the ratchet teeth.

[0015] In one embodiment, the top block further includes a connecting rod axially parallel to the clutch support axis, one end of the connecting rod extending into the mounting groove and connected to the engagement part, and the other end extending out of the mounting groove;

[0016] The meshing part is an arc-shaped plate, and the radial elastic element abuts against the arc-shaped plate so that the arc-shaped plate is engaged with the ratchet teeth.

[0017] In one embodiment, the pressing member includes a connecting plate and a pressing plate connected to each other. The connecting plate is connected to the input shaft, and the pressing plate is located on the side of the top block facing away from the input shaft along the radial direction. The pressing plate is capable of pressing onto at least one of the engagement portions in the second transmission state.

[0018] In one embodiment, the pressing plate is an arc-shaped plate that protrudes outward along the radial direction, and the connecting plate is connected to the middle region between opposite ends of the pressing plate;

[0019] One of the press-fit members is configured to press against the two top blocks in the second transmission state, and the two engaging portions of the two top blocks corresponding to the press-fit member extend away from the press-fit member.

[0020] In one embodiment, one of the ratchet teeth includes two grooves arranged circumferentially along the clutch support, and the engagement portion is capable of abutting against one of the grooves of the ratchet tooth.

[0021] In one embodiment, the bidirectional ratchet clutch further includes an axial elastic element sleeved on the input shaft, the axial elastic element being used to maintain a gap between the pressing member and the top block;

[0022] When in the second transmission state, the input shaft is configured to be pressed in along the axial direction to overcome the elastic force of the axial elastic element.

[0023] In one embodiment, the bidirectional ratchet clutch further includes a first cover plate and a second cover plate, which are respectively disposed on both axial sides of the clutch support and are both connected to the clutch support. The first cover plate is provided with a guide hole for the top block to pass through.

[0024] In one embodiment, the bidirectional ratchet clutch further includes a spacer post, through which the first cover plate is connected to the clutch support.

[0025] This application also provides a ring main unit, including a motor, a gearbox, and a bidirectional ratchet clutch as described in any of the above, wherein the output end of the motor is connected to the input end of the gearbox, and the output end of the gearbox meshes with the outer peripheral surface of the ratchet.

[0026] The aforementioned bidirectional ratchet clutch connects a clutch support to the output shaft. A mounting groove is provided on the outer circumference of the clutch support, and a ratchet gear is fitted onto the outside of the clutch support. A top block is installed in the corresponding mounting groove, so that the meshing part of the top block engages with the ratchet teeth of the ratchet gear. In the first transmission state, an external force (e.g., a motor) drives the ratchet gear to rotate, and the ratchet teeth directly push the meshing top block, transmitting power to the output shaft via the clutch support. The input shaft of the input component is connected to the clutch support, and the pressure fitting of the input component is located on the side of the top block radially away from the input shaft. In the second transmission state, manual operation first performs an axial pressing action on the input shaft. The pressure fitting forces the meshing part of the top block to move radially inward, disengaging from the ratchet gear, thus physically interrupting the electric drive chain. Subsequently, the rotational torque of the input shaft directly drives the disengaged top block to rotate via the pressure fitting, thereby driving the clutch support and the output shaft to rotate. At this time, the undriven top block slips on the ratchet teeth, creating no resistance.

[0027] The bidirectional ratchet clutch of this application has a first transmission state in which the ratchet drives the top block to achieve transmission, and a second transmission state in which the input shaft is axially pressed in and the top block is driven by the pressing member to achieve transmission. This makes the electric drive path (through the ratchet) and the manual drive path (through the input shaft) two independently selectable and non-interfering transmission channels.

[0028] When the bidirectional ratchet clutch of this application is added to the manual operating shaft of the ring main unit, the original manual operating shaft structure can be changed without changing it, and the installation and alignment can be completed without precise on-site tooling and debugging. This realizes the quick and independent addition and replacement of the electric operating mechanism. At the same time, since the top block can actively disengage from the ratchet during manual operation, only the clutch support needs to be driven without driving the external motor and gearbox, making the manual operation process convenient and direct. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the bidirectional ratchet clutch engaging with the gearbox, provided in an embodiment of this application.

[0030] Figure 2 An exploded view of a bidirectional ratchet clutch provided in an embodiment of this application.

[0031] Figure 3 This is a schematic diagram of the ratchet gear sleeved on the outside of the clutch support, as provided in an embodiment of this application.

[0032] Figure 4 This is a schematic diagram of the structure of the radial elastic member abutting against the top block provided in the embodiment of this application.

[0033] Figure 5 This is a schematic diagram of the clutch support provided in an embodiment of this application.

[0034] Figure 6 This is a schematic diagram of the ratchet gear provided in an embodiment of this application.

[0035] Figure 7 This is a schematic diagram of the top block provided in an embodiment of this application.

[0036] Figure 8 This is a schematic diagram of the structure of the input component provided in an embodiment of this application.

[0037] Figure label:

[0038] 100. Clutch support; 110. Mounting groove; 120. Arc groove; 130. Through hole; 131. Annular groove; 140. First cover plate; 141. Guide hole; 150. Second cover plate; 160. Spacer post;

[0039] 200. Ratchet gear; 210. Ratchet tooth;

[0040] 300. Top block; 310. Engaging part; 320. Connecting rod;

[0041] 400. Input component; 410. Input shaft; 420. Press-fit component; 421. Connecting plate; 422. Pressing plate;

[0042] 500, Output shaft;

[0043] 600. Radial elastic element;

[0044] 700. Axial elastic element;

[0045] 800, Electric motor;

[0046] 900, gearbox. Detailed Implementation

[0047] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0048] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0049] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0051] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0052] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0053] This application provides a ring main unit, such as... Figure 1 and Figure 2 As shown, the device includes a motor 800, a gearbox 900, and a two-way ratchet clutch. The output end of the motor 800 is connected to the input end of the gearbox 900, and the output end of the gearbox 900 meshes with the outer circumferential surface of the ratchet 200. In this ring main unit, the output end of the motor 800 is connected to the input end of the gearbox 900, and the output end of the gearbox 900 meshes with the outer circumferential surface of the ratchet 200. This allows the power output from the motor 800 to be transmitted to the ratchet 200 after being reduced in speed and torque by the gearbox 900, thus meeting the torque requirements for the operation of the ring main unit.

[0054] By setting up a two-way ratchet clutch, the ring main unit has two independent operating modes: electric and manual. In electric operation, the ratchet 200 is driven by the motor 800 and the gearbox 900 to achieve remote control operation and meet the needs of distribution network automation. In manual operation, there is no need to drive the motor 800 and the gearbox 900. Manual operation can be achieved simply by rotating the two-way ratchet clutch, which solves the problem of inconvenience in manual operation after adding an electric operating mechanism to the existing ring main unit.

[0055] Furthermore, a two-way ratchet clutch, such as Figures 2 to 8 As shown, the two-way ratchet clutch includes:

[0056] The clutch support 100 has at least two mounting slots 110 on its outer peripheral surface;

[0057] A ratchet 200 is sleeved on the outside of the clutch support 100, and ratchet teeth 210 are provided on the inner circumferential surface of the ratchet 200.

[0058] At least two top blocks 300 are installed in at least two mounting slots 110 in a one-to-one correspondence. Each top block 300 includes a meshing part 310 that can engage with the ratchet teeth 210. The meshing part 310 can move radially along the clutch support 100.

[0059] The input assembly 400 includes an input shaft 410 connected to a clutch support 100, and the press-fit 420 is at least partially located on the side of the top block 300 that is radially away from the input shaft 410.

[0060] Output shaft 500 is connected to clutch support 100;

[0061] The bidirectional ratchet clutch has a first transmission state and a second transmission state. When in the first transmission state, the engagement part 310 engages with the ratchet tooth 210, and the ratchet gear 200 is configured to drive rotation so that the ratchet tooth 210 pushes at least one top block 300 to rotate, thereby driving the clutch support 100 and the output shaft 500 to rotate synchronously.

[0062] When in the second transmission state, the input shaft 410 is configured to be pressed into the clutch support 100 along the axial direction, so that the pressing member 420 is pressed onto the engagement part 310, so that the engagement part 310 disengages from the ratchet tooth 210, and the input shaft 410 is configured to rotate, so that the pressing member 420 drives the top block 300 to drive the clutch support 100 and the output shaft 500 to rotate synchronously.

[0063] The aforementioned bidirectional ratchet clutch connects the clutch support 100 to the output shaft 500. An mounting groove 110 is provided on the outer circumferential surface of the clutch support 100. The ratchet 200 is sleeved on the outside of the clutch support 100, and the top block 300 is installed in the corresponding mounting groove 110, so that the meshing part 310 of the top block 300 engages with the ratchet teeth 210 of the ratchet 200. When in the first transmission state, an external force (e.g., a motor 800) drives the ratchet 200 to rotate, and the ratchet teeth 210 directly push the meshing top block 300. The power is transmitted to the output shaft 500 through the clutch support 100.

[0064] The input shaft 410 of the input assembly 400 is connected to the clutch support 100, and the crimping member 420 of the input assembly 400 is at least partially disposed on the side of the top block 300 that is radially away from the input shaft 410. When in the second transmission state, the input shaft 410 is first axially pressed in by manual operation. The crimping member 420 forces the meshing part 310 of the top block 300 to move radially inward, disengaging from the ratchet 200, thereby physically interrupting the electric drive chain. Subsequently, the rotational torque of the input shaft 410 directly drives the disengaged top block 300 to rotate through the crimping member 420, thereby driving the clutch support 100 and the output shaft 500 to rotate.

[0065] The bidirectional ratchet clutch of this application has a first transmission state in which the ratchet 200 drives the top block 300 to achieve transmission, and a second transmission state in which the input shaft 410 is axially pressed in and the top block 300 is driven by the pressing member 420 to achieve transmission. This makes the electric drive path (through the ratchet 200) and the manual drive path (through the input shaft 410) two independently selectable and non-interfering transmission channels.

[0066] When the bidirectional ratchet clutch of this application is added to the manual operating shaft of the ring main unit, the original manual operating shaft structure can be changed without changing it, and the installation and alignment can be completed without precise on-site tooling debugging. This realizes the quick and independent addition and replacement of the electric operating mechanism. At the same time, since the top block 300 can actively disengage from the ratchet 200 during manual operation, only the clutch support 100 needs to be driven without driving the external motor 800 and gearbox 900, making the manual operation process convenient and direct.

[0067] It should be noted that when in the second state, the undriven top block 300 slips on the ratchet teeth 210 and does not generate resistance.

[0068] In this embodiment, the clutch support 100 and the input shaft 410 are coaxially connected.

[0069] In this embodiment, as Figures 2 to 5 As shown, a mounting groove 110 is provided in the circumference of the clutch support 100, and the mounting groove 110 is arc-shaped.

[0070] In this embodiment, as Figures 2 to 5 As shown, a hexagonal shaft hole is designed at the center of the rear of the clutch support 100 for connection with the output shaft 500.

[0071] In one embodiment, such as Figures 2 to 5 As shown, the two-way ratchet clutch also includes a radial elastic element 600 disposed within the mounting groove 110. The radial elastic element 600 provides a radially outward elastic force to engage the engagement portion 310 with the ratchet teeth 210. The radial elastic element 600, disposed within the mounting groove 110 of the clutch support 100, provides a radially outward elastic force along the clutch support 100. Since the meshing part 310 of the top block 300 can move radially, and the meshing part 310 needs to engage with the ratchet teeth 210 of the ratchet gear 200 to ensure power transmission in the first transmission state, the elastic force of the radial elastic element 600 can always act on the top block 300 to ensure that the meshing part 310 is stably abutted against the ratchet teeth 210 of the ratchet gear 200, avoiding loosening or disengagement between the meshing part 310 and the ratchet teeth 210 due to vibration, external force interference or wear after long-term use. This ensures that when the ratchet gear 200 rotates in the first transmission state, the ratchet teeth 210 can push the top block 300, thereby driving the clutch support 100 and the output shaft 500 to rotate synchronously.

[0072] Meanwhile, when switching to the second transmission state, the radially inward pressure applied by the crimping member 420 to the meshing part 310 can overcome the elastic force of the radial elastic member 600, so that the meshing part 310 can smoothly disengage from the ratchet tooth 210 without affecting the smoothness of the manual drive mode switching.

[0073] In this embodiment, the radial elastic element 600 is a linear spring.

[0074] In this embodiment, as Figures 2 to 5 As shown, an arc-shaped groove 120 is provided on the end face of the clutch support 100. The arc-shaped groove 120 is connected to the mounting groove 110. One end of the radial elastic member 600 is located in the mounting groove 110 and abuts against the engagement part 310 of the top block 300. The other end of the radial elastic member 600 extends into the arc-shaped groove 120. By providing the arc-shaped groove 120, a stable installation and extension space can be provided for the radial elastic member 600, avoiding the linear spring from shifting or getting stuck during extension and contraction. At the same time, the curvature of the arc-shaped groove 120 is adapted to the movement trajectory of the top block 300, ensuring that the elastic force of the radial elastic member 600 on the top block 300 is always along the radial direction of the clutch support 100.

[0075] In this embodiment, the number of radial elastic members 600 is the same as the number of top blocks 300, and each radial elastic member 600 abuts against the engaging portion 310 of the corresponding top block 300. The number of arc-shaped grooves 120 is the same as the number of radial elastic members 600, and each radial elastic member 600 is disposed in the corresponding arc-shaped groove 120.

[0076] In one embodiment, such as Figures 2 to 7 As shown, the top block 300 also includes a connecting rod 320 whose axial direction is parallel to that of the clutch support 100. One end of the connecting rod 320 extends into the mounting groove 110 and connects to the engagement part 310, while the other end extends out of the mounting groove 110. The engagement part 310 is an arc-shaped plate, and the radial elastic member 600 abuts against the arc-shaped plate to engage the arc-shaped plate with the ratchet teeth 210. By setting the engagement part 310 as an arc-shaped plate, the contact area between the engagement part 310 and the ratchet teeth 210 is increased, making the abutting force of the radial elastic member 600 on the arc-shaped plate more uniform, thereby making the engagement between the arc-shaped plate and the ratchet teeth 210 more stable.

[0077] In the first transmission state, the power transmitted to the top block 300 when the ratchet 200 rotates is more stable, reducing wear caused by excessive local force; moreover, the meshing part 310 of the arc plate also makes the pressing part 420 press against the meshing part 310 more closely in the second transmission state, which can push the meshing part 310 radially inward more efficiently, ensuring that the meshing part 310 quickly disengages from the ratchet tooth 210.

[0078] By setting the connecting rod 320, the top block 300 can be installed in the mounting groove 110 of the clutch support 100. The cooperation between the connecting rod 320 and the mounting groove 110 plays a guiding role, restricting the top block 300 to move only radially along the clutch support 100, and preventing the top block 300 from circumferentially offset or shaking during transmission, thereby facilitating the cooperation between the top block 300 and other structural components of the two-way ratchet clutch.

[0079] In this embodiment, as Figures 2 to 7 As shown, the engagement portion 310 of the arc-shaped plate is an arc-shaped structure that protrudes radially outward. It should be noted that the radially outward direction refers to the direction along the radial direction of the clutch support 100 and away from the input shaft 410, while the radially inward direction refers to the direction along the radial direction of the clutch support 100 and close to the input shaft 410.

[0080] It should be noted that the arc length of the bottom wall of the mounting groove 110 is greater than the arc length of the engaging part 310, so as to reserve sufficient space for the radial movement of the top block 300, while avoiding interference between the engaging part 310 and the side wall of the mounting groove 110 during the movement.

[0081] In one embodiment, such as Figures 2 to 8As shown, the crimping member 420 includes a connecting plate 421 and a pressing plate 422 connected to each other. The connecting plate 421 is connected to the input shaft 410, and the pressing plate 422 is located on the side of the top block 300 that is radially away from the input shaft 410. The pressing plate 422 can be pressed onto at least one meshing part 310 in the second transmission state. The connecting plate 421 of the crimping member 420 connects the pressing plate 422 and the input shaft 410, ensuring that the power of the input shaft 410 during axial pressing and rotation can be transmitted to the pressing plate 422; while the pressing plate 422 is located on the side of the top block 300 that is radially away from the input shaft 410, and when the input shaft 410 is axially pressed, the pressing plate 422 can directly act on the meshing part 310.

[0082] In the second transmission state, the pressing plate 422 can press onto at least one meshing part 310, ensuring that the corresponding meshing part 310 can be pushed out of the ratchet tooth 210, thereby ensuring that the manual drive path can be completely disconnected from the electric drive path, so that the motor 800 and gearbox 900 do not need to be driven during manual operation, reducing operating resistance and making manual operation easier and smoother.

[0083] In this embodiment, as Figure 8 As shown, hooks extending towards the input shaft 410 are provided at both ends of the pressing plate 422. The hooks can abut against the top block 300 in the second transmission state, thereby further enhancing the connection reliability between the pressing member 420 and the top block 300. At the same time, the abutting action of the hooks can form a circumferential limit on the top block 300, ensuring that the rotational power of the input shaft 410 is transmitted to the top block 300 through the pressing member 420, thereby driving the clutch support 100 and the output shaft 500 to rotate smoothly.

[0084] In one embodiment, such as Figures 2 to 8As shown, the pressing plate 422 is an arc-shaped plate that bulges outward in the radial direction, and the connecting plate 421 is connected to the middle area between the opposite ends of the pressing plate 422. A pressing member 420 is configured to press against the two top blocks 300 in the second transmission state, and the two meshing portions 310 of the two top blocks 300 corresponding to the pressing member 420 extend away from the pressing member 420. Compared with an inwardly recessed arc-shaped plate, setting the pressing plate 422 as an arc-shaped plate that bulges outward in the radial direction enhances the structural strength of the pressing plate 422, making it less prone to deformation when subjected to the pressure and torque transmitted by the input shaft 410. A crimping member 420 is configured to press against two top blocks 300 in the second transmission state, and the meshing portions 310 of the two top blocks 300 extend away from the crimping member 420, so that the pressing plate 422 can simultaneously press against the two meshing portions 310 in the second transmission state. When the input shaft 410 rotates, the pressing plate 422 can simultaneously drive the two top blocks 300 to rotate the clutch support 100. This not only enhances the stability and reliability of power transmission and avoids the problem of uneven force or insufficient power that may occur when a single top block 300 is driven, but also makes the clutch support 100 more evenly stressed and reduces vibration and wear during rotation.

[0085] It should be noted that the middle area between the two ends of the pressing plate 422 refers to the area between the two ends of the pressing plate 422 itself.

[0086] It should be noted that, as Figure 4 As shown, the connecting rod 320 of the top block 300 is connected to one end of the engaging portion 310. A crimping member 420 is configured to crimp onto the two top blocks 300 in the second transmission state, and the engaging portions 310 of the two top blocks 300 extend away from the crimping member 420. That is, a crimping member 420 is configured to crimp onto the two top blocks 300 in the second transmission state, and the engaging portions 310 of the two top blocks 300 extend away from the end opposite to the connecting rod 320.

[0087] In this embodiment, as Figures 2 to 8 As shown, there are four mounting grooves 110, top block 300, radial elastic element 600, and arc groove 120, and two crimping elements 420. The two crimping elements 420 are arranged radially and are both connected to the input shaft 410.

[0088] In one embodiment, such as Figures 2 to 7As shown, the ratchet tooth 210 is M-shaped. Each ratchet tooth 210 includes two groove walls arranged circumferentially along the clutch support 100. The meshing part 310 can abut against one of the groove walls of the M-shaped ratchet tooth 210. The ratchet tooth 210 is designed as M-shaped, with each ratchet tooth 210 having two groove walls arranged circumferentially along the clutch support 100. In the first transmission state, the meshing part 310 can selectively abut against one of the groove walls. Regardless of whether the ratchet gear 200 rotates forward or backward, it can drive the meshing part 310 to rotate the clutch support 100 and the output shaft 500 through the corresponding groove wall, realizing bidirectional transmission function. The two groove walls of the M-shaped ratchet tooth 210 can provide a clear and stable abutment surface for the meshing part 310, making the power direction transmitted from the ratchet gear 200 to the top block 300 more precise, reducing lateral forces during power transmission, avoiding abnormal wear of the top block 300 and ratchet gear 200 due to force deviation, and improving transmission stability.

[0089] In one embodiment, such as Figures 2 to 5 As shown, the bidirectional ratchet clutch also includes an axial elastic element 700 sleeved on the input shaft 410. The axial elastic element 700 is used to maintain a gap between the pressing member 420 and the top block 300. When in the second transmission state, the input shaft 410 is configured to be pressed in axially to overcome the elastic force of the axial elastic element 700.

[0090] An axial elastic element 700 is sleeved on the input shaft 410. The axial elastic element 700 can continuously provide elastic force along the axial direction, so that the press member 420 and the top block 300 always maintain a preset gap. This gap ensures that in the first transmission state, the press member 420 will not interfere with the meshing part 310 of the top block 300. The top block 300 can mesh with the ratchet tooth 210 under the action of the radial elastic element 600, avoiding the obstruction of power transmission or component wear caused by the contact between the press member 420 and the top block 300.

[0091] When switching to the second transmission state, the elastic force of the axial elastic element 700 can be overcome by manual operation, that is, the input shaft 410 is pressed in axially, so that the pressing element 420 and the meshing part 310 are pressed together. This process is convenient to operate, does not require a complicated control structure, and the elastic force of the axial elastic element 700 can provide a restoring force for the input shaft 410. When the manual operation is completed, the input shaft 410 can automatically return to the initial position under the action of the axial elastic element 700, so that the pressing element 420 and the top block 300 maintain the gap again, ensuring that the bidirectional ratchet clutch can quickly return to the first transmission state.

[0092] In this embodiment, the axial elastic element 700 is a compression spring.

[0093] In this embodiment, a through hole 130 is provided on the clutch support 100. The through hole 130 is used to accommodate at least a portion of the input shaft 410. An annular groove 131 is provided on the wall of the through hole 130. The annular groove 131 is used to accommodate the axial elastic member 700. The annular groove 131 can limit the axial elastic member 700, prevent the compression spring from shifting during extension and retraction, and ensure that the axial elastic member 700 always provides elastic force along the axial direction of the input shaft 410.

[0094] In one embodiment, such as Figures 2 to 8 As shown, the bidirectional ratchet clutch also includes a first cover plate 140 and a second cover plate 150. The first cover plate 140 and the second cover plate 150 are respectively disposed on both axial sides of the clutch support 100 and are both connected to the clutch support 100. The first cover plate 140 is located on the side of the clutch support 100 closer to the input shaft 410, and the first cover plate 140 is provided with a guide hole 141 for the top block 300 to pass through. By disposing the first cover plate 140 and the second cover plate 150 on both axial sides of the clutch support 100 and connecting them to the clutch support 100, the top block 300, the ratchet 200 and other internal components, it forms an axial limit and protection for the clutch support 100, the top block 300, the ratchet 200 and other internal components, preventing the internal components from becoming loose or detached due to axial displacement during transmission, and at the same time preventing external dust, impurities and other contaminants from entering the clutch and affecting the fit accuracy and service life of the components. The first cover plate 140 is located on the side of the clutch support 100 near the input shaft 410. The first cover plate 140 is provided with a guide hole 141 for the top block 300 to pass through, which further prevents the top block 300 from shifting or getting stuck when it moves.

[0095] In one embodiment, such as Figures 2 to 8 As shown, the bidirectional ratchet clutch also includes a spacer post 160, and the first cover plate 140 is connected to the clutch support 100 via the spacer post 160. The first cover plate 140 is connected to the clutch support 100 via the spacer post 160. The spacer post 160 can control the axial distance between the first cover plate 140 and the clutch support 100, forming a gap, thereby ensuring that the pressing member 420 of the input assembly 400 has sufficient room for movement, so that the input is not restricted due to the gap being too small, nor is the input shaking due to the gap being too large; at the same time, this gap helps to dissipate the heat generated during the operation of the clutch, preventing the components from being affected by overheating and affecting their performance and service life.

[0096] In summary, when the bidirectional ratchet clutch is in the first transmission state, the motor 800 starts and drives the gearbox 900 to rotate. The last gear of the gearbox 900 drives the ratchet 200 to rotate. The ratchet teeth 210 on the inner circumferential surface of the ratchet 200 engage with the meshing part 310 of the top block 300. Under the elastic force of the radial elastic element 600, the meshing part 310 abuts against the groove wall of the ratchet teeth 210. When the ratchet 200 rotates, it pushes the top block 300 to rotate circumferentially through the ratchet teeth 210. The top block 300 drives the clutch support 100 and the output shaft 500 to rotate synchronously, thereby completing the electric opening and closing operation of the ring main unit.

[0097] When in the second transmission state, the manual operating handle is connected to the input shaft 410, overcoming the elastic force of the axial elastic element 700 (compression spring), and the input shaft 410 is pressed in axially. The pressing plate 422 of the pressing member 420 presses against the meshing part 310 of the top block 300, so that the meshing part 310 overcomes the elastic force of the radial elastic element 600 (linear spring), thereby disengaging from the ratchet gear 200 ratchet teeth 210. At this time, the electric transmission chain is disconnected. Then, the manual operating handle is rotated to drive the input shaft 410 to rotate. The input shaft 410 drives the top block 300 to rotate through the pressing member 420. The top block 300 drives the clutch support 100 and the output shaft 500 to rotate synchronously, completing the manual closing and opening operation of the ring main unit. During the manual rotation, the top block 300, which is not driven by the pressing member 420, slips on the ratchet teeth 210 and does not generate additional resistance. It should be noted that the axial pressing of the input shaft can disengage the meshing part 310 of the top block from the ratchet teeth 210 of the ratchet gear. The core is that the axial force drives the pressing member to generate a radial pressing action, which overcomes the elastic force of the radial elastic member 600 and forces the meshing part 310 to move inward along the radial direction of the clutch support 100, and finally disengage from the ratchet teeth 210.

[0098] When operated manually, the input shaft 410 is pressed into the clutch support 100 along its axial direction. The force transmission and action logic of the entire process are as follows:

[0099] The manually applied axial pressure pushes the input shaft 410 to move into the clutch support 100, overcoming the pre-tightening force of the axial elastic element 700, so that the input shaft 410 drives the pressing element 420 to move synchronously towards the top block 300 along the axial direction.

[0100] The pressing plate 422 of the pressing member 420 is an arc-shaped plate that protrudes radially outward and is located on the outside of the engagement portion 310. When the pressing member 420 moves axially with the input shaft 410 to contact the engagement portion 310, the axial force that is continuously applied will be converted into a radially inward pressing force on the engagement portion 310 through the arc-shaped surface of the pressing plate 422 (the axial force pushes the pressing plate 422 to squeeze the outside of the engagement portion 310, forcing the engagement portion 310 to contract towards the center).

[0101] The radially inward force applied by the pressing plate 422 is greater than the radially outward elastic force applied by the radial elastic member 600. The meshing part 310 of the top block 300 is forced to move radially inward along the clutch support 100 and gradually disengage from the groove of the ratchet tooth 210 on the inner circumferential surface of the ratchet gear 200.

[0102] When the meshing part 310 completely disengages from the ratchet tooth 210, the power transmission path between the ratchet 200 and the clutch support 100 is cut off (at this time, the ratchet 200 driven by the motor 800 and the gearbox 900 rotates, but does not drive the top block 300 and the clutch support 100). Subsequently, the rotary input shaft 410 can directly drive the top block 300 and the clutch support 100 to rotate through the pressing part 420, realizing resistance-free manual operation.

[0103] It should be noted that the rotation of the input shaft 410 can drive the top block 300 to rotate via the pressing member 420. When in the second transmission state, the input shaft 410 drives the pressing member 420 to rotate, thereby causing the connecting plate 421 of the pressing member 420 to abut against the connecting rod 320 of the top block 300, thereby driving the top block 300 to rotate.

[0104] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0105] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A two-way ratchet clutch, characterized in that, The bidirectional ratchet clutch includes: The clutch support (100) has at least two mounting slots (110) on its outer peripheral surface; A ratchet (200) is sleeved on the outside of the clutch support (100), and the inner circumferential surface of the ratchet (200) is provided with ratchet teeth (210); At least two top blocks (300) are installed in the at least two mounting slots (110) in a one-to-one correspondence. Each top block (300) includes a meshing part (310) that can engage with the ratchet teeth (210). The meshing part (310) can move radially along the clutch support (100). An input assembly (400) includes a connected input shaft (410) and a crimping member (420), the input shaft (410) being connected to the clutch support (100), and the crimping member (420) being at least partially located on the side of the top block (300) facing away from the input shaft (410) in the radial direction; The output shaft (500) is connected to the clutch support (100); The bidirectional ratchet clutch has a first transmission state and a second transmission state. When in the first transmission state, the engagement part (310) engages with the ratchet tooth (210), and the ratchet gear (200) is configured to drive rotation so that the ratchet tooth (210) pushes at least one of the top blocks (300) to rotate, thereby driving the clutch support (100) and the output shaft (500) to rotate synchronously. When in the second transmission state, the input shaft (410) is configured to be pressed into the clutch support (100) axially, so that the press-fit member (420) is pressed onto the engagement part (310) so that the engagement part (310) disengages from the ratchet tooth (210). The input shaft (410) is configured to rotate so as to drive the top block (300) through the press-fit member (420) to drive the clutch support (100) and the output shaft (500) to rotate synchronously.

2. The bidirectional ratchet clutch according to claim 1, characterized in that, It also includes a radial elastic element (600) disposed in the mounting groove (110), the radial elastic element (600) being used to provide an outward elastic force along the radial direction so that the engagement portion (310) engages with the ratchet tooth (210).

3. The bidirectional ratchet clutch according to claim 2, characterized in that, The top block (300) also includes a connecting rod (320) axially parallel to the clutch support (100). One end of the connecting rod (320) extends into the mounting groove (110) and is connected to the engagement part (310), while the other end extends out of the mounting groove (110). The meshing part (310) is an arc-shaped plate, and the radial elastic member (600) abuts against the arc-shaped plate so that the arc-shaped plate engages with the ratchet tooth (210).

4. The bidirectional ratchet clutch according to claim 3, characterized in that, The crimping member (420) includes a connecting plate (421) and a pressing plate (422) connected to each other. The connecting plate (421) is connected to the input shaft (410), and the pressing plate (422) is located on the side of the top block (300) facing away from the input shaft (410) in the radial direction. The pressing plate (422) can be pressed onto at least one of the engagement portions (310) in the second transmission state.

5. The bidirectional ratchet clutch according to claim 4, characterized in that, The pressing plate (422) is an arc-shaped plate that protrudes outward along the radial direction, and the connecting plate (421) is connected to the middle area between the opposite ends of the pressing plate (422); One of the crimping members (420) is configured to crimp onto the two top blocks (300) in the second transmission state, and the two engaging portions (310) of the two top blocks (300) to which the crimping member (420) is crimped extend away from the crimping member (420).

6. The bidirectional ratchet clutch according to claim 2, characterized in that, One of the ratchet teeth (210) includes two groove walls arranged circumferentially along the clutch support (100), and the engagement portion (310) is capable of abutting against one of the groove walls of the ratchet tooth (210).

7. The bidirectional ratchet clutch according to claim 1, characterized in that, It also includes an axial elastic element (700) sleeved on the input shaft (410), the axial elastic element (700) being used to maintain a gap between the press-fit member (420) and the top block (300); When in the second transmission state, the input shaft (410) is configured to be pressed along the axial direction to overcome the elastic force of the axial elastic member (700).

8. The bidirectional ratchet clutch according to claim 1, characterized in that, It also includes a first cover plate (140) and a second cover plate (150), the first cover plate (140) and the second cover plate (150) are respectively disposed on both sides of the clutch support (100) and are both connected to the clutch support (100). The first cover plate (140) is provided with a guide hole (141) for the top block (300) to pass through.

9. The bidirectional ratchet clutch according to claim 8, characterized in that, It also includes a spacer (160), through which the first cover plate (140) is connected to the clutch support (100).

10. A ring main unit, characterized in that, It includes a motor (800), a gearbox (900), and a bidirectional ratchet clutch as described in any one of claims 1-9, wherein the output end of the motor (800) is connected to the input end of the gearbox (900), and the output end of the gearbox (900) meshes with the outer peripheral surface of the ratchet (200).

Images