Clamping mechanism of busbar for motor

Abstract

The utility model discloses a clamping mechanism of a bus bar for a motor, which comprises a clamping assembly, a pre-pressing assembly and a rotating assembly, and is characterized in that the clamping assembly is used for clamping the bus bar; the pre-pressing assembly is installed at the top end of the clamping assembly. The rotating assembly is installed at the end, away from the clamping assembly, of the pre-pressing assembly and used for driving the pre-pressing assembly and the clamping assembly to rotate in the circumferential direction of the rotating assembly. The clamping assembly is provided with a protection mechanism, and the protection mechanism and the clamping assembly act together and are used for clamping a busbar. According to the utility model, the busbar can be accurately clamped, the clamping reliability and stability are ensured, the whole clamping mechanism has a protection mechanism, and the clamping failure and slipping conditions are avoided.

Description

Motor busbar clamping mechanism Technical Field

[0001] This utility model relates to the field of clamping technology, and in particular to a clamping mechanism for a busbar for a motor. Background Technology

[0002] A busbar is a conductive component used for efficient current transmission and is widely used in power electronic equipment, new energy vehicles, and industrial motors. In automotive electric power steering (EPS) systems, the busbar, as a key power transmission component, is responsible for providing a stable current supply to the rotor and stator of the motor, ensuring the reliable operation of the steering system.

[0003] Currently, busbars used in EPS systems mainly have two structures: regular and irregular. The regular busbar, as shown in Figure 1, has a central column 41, and three uprights 42 along the circumferential direction of the column 41 on the busbar 40. The entire busbar can be clamped by holding the column. Simultaneously, the busbar as a whole acts as an integrated terminal, requiring precise insertion into the motor and reliable connection to the stator terminals. However, existing clamping mechanisms have the following problems in practical use:

[0004] 1. Insufficient or malfunctioning clamping force: The clamping mechanism may not hold the busbar securely due to uneven force, affecting subsequent assembly;

[0005] 2. Positioning deviation: During the clamping process, offset or asynchronous phenomena may occur, resulting in inaccurate alignment between the busbar and the stator terminals;

[0006] 3. Risk of slippage: Traditional clamping methods lack a protective mechanism, which can easily lead to slippage and clamping failure. Summary of the Invention

[0007] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a clamping mechanism for a busbar for a motor, which can achieve precise clamping of the busbar and ensure reliable and stable clamping.

[0008] A clamping mechanism for a motor busbar according to an embodiment of the present invention includes:

[0009] A clamping assembly for clamping busbars;

[0010] A pre-compression assembly, which is mounted on the top of the clamping assembly;

[0011] A rotating assembly is mounted at the end of the pre-compression assembly away from the clamping assembly, for driving the pre-compression assembly and the clamping assembly to rotate in their circumferential direction;

[0012] The clamping assembly is equipped with a protective mechanism, which works together with the clamping assembly to clamp the busbar.

[0013] In some embodiments of this utility model, the clamping assembly includes:

[0014] A clamping cylinder, the fixed end of which is connected to the pre-compression assembly;

[0015] A three-jaw chuck is installed on the output end of the clamping cylinder, and the inner side wall of the three-jaw chuck mates with the outer side wall of the busbar column.

[0016] A limiting bracket is provided with a first through hole at the center of the limiting bracket, and a U-shaped groove that matches the column on the busbar is provided on the outer side wall of the limiting bracket.

[0017] A connector, wherein a second through hole is provided at the center of the connector, the connector is arranged below the limiting bracket, and the connector is connected to the clamping cylinder through a connecting rod;

[0018] The clamping part of the three-jaw chuck passes through the first through hole and the second through hole in sequence, and extends to the bottom of the connector.

[0019] In some embodiments of this utility model, the protection mechanism includes a position sensor mounted on the limiting bracket, a plurality of torsion springs mounted on the limiting bracket, and a plurality of fan-shaped annular holes opened on the limiting bracket, the plurality of fan-shaped annular holes being evenly distributed along the circumferential direction of the limiting bracket; there are a plurality of connecting rods, the plurality of connecting rods being arranged one-to-one in the fan-shaped annular holes, the upper end of the connecting rod passing through the clamping cylinder and connecting to the pre-compression assembly, and the lower end of the connecting rod being connected to the connecting member.

[0020] In some embodiments of this utility model, the pre-compression component includes:

[0021] Upper connecting plate;

[0022] A lower connecting plate, which is arranged below the upper connecting plate;

[0023] Guide posts, there are multiple guide posts, the multiple guide posts are installed between the lower connecting plate and the upper connecting plate, and each guide post is equipped with a spring;

[0024] The clamping assembly is installed at the bottom of the lower connecting plate.

[0025] In some embodiments of this utility model, the rotating assembly includes:

[0026] Mounting plate;

[0027] A connecting bracket defining a second receiving cavity that is open at both the top and bottom, the connecting bracket being mounted below the mounting plate;

[0028] A rotary motor is fixedly mounted on the mounting plate, and the output end of the rotary motor passes through the connecting frame and is connected to the top of the preload assembly. Attached Figure Description

[0029] Figure 1 is a schematic diagram of the structure of the regular busbar mentioned in the embodiment of this utility model;

[0030] Figure 2 is a schematic diagram of the clamping mechanism of the busbar for motor according to an embodiment of the present invention;

[0031] Figure 3 is a cross-sectional view of Figure 2;

[0032] Figure 4 is a schematic diagram of the clamping cylinder and three-jaw chuck of this utility model;

[0033] Figure 5 is a schematic diagram of the limiting bracket of this utility model;

[0034] Figure 6 is a schematic diagram of Figure 5 from another perspective;

[0035] Figure 7 is a schematic diagram of this utility model from another angle.

[0036] In the picture:

[0037] 100. Clamping mechanism;

[0038] 10. Clamping assembly; 11. Clamping cylinder; 12. Three-jaw chuck; 13. Limiting bracket; 131. First through hole; 132. U-shaped groove; 133. Fan-shaped annular hole; 14. Connector; 141. Second through hole;

[0039] 20. Pre-compression assembly; 21. Upper connecting plate; 22. Lower connecting plate; 23. Guide post; 24. Spring;

[0040] 30. Rotating assembly; 31. Mounting plate; 32. Connecting bracket; 33. Rotating motor;

[0041] 40. Busbar; 41. Column; 42. Support column;

[0042] 50. Connecting rod;

[0043] 60. Protection mechanism; 61. Position sensor; 62. Torsion spring. Detailed Implementation

[0044] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0045] The clamping mechanism 100 for a busbar 40 according to an embodiment of the present invention is described below with reference to Figures 1-7. The mechanism includes a clamping assembly 10, a pre-pressure assembly 20, and a rotating assembly 30. The clamping assembly 10 is used to clamp the busbar 40; the pre-pressure assembly 20 is mounted on the top of the clamping assembly 10; the rotating assembly 30 is mounted on the end of the pre-pressure assembly 20 away from the clamping assembly 10 and is used to drive the pre-pressure assembly 20 and the clamping assembly 10 to rotate in their circumferential direction. The clamping assembly 10 is provided with a protective mechanism 60, which works in conjunction with the clamping assembly 10 to clamp the busbar.

[0046] For example, the clamping assembly 10 can clamp the busbar 40 via the column 41 at its center, thus clamping and releasing the entire busbar 40. The clamping assembly 10 has at least a first working state and a second working state. In the first working state, the clamping assembly 10 is in a natural state, and its clamping part can move to the column 41 on the busbar 40, surrounding the column 41 from the outside. In the second state, the clamping assembly 10 is in a clamped state, and its clamping part moves inward to approach and clamp the outer wall of the column, thus clamping the entire busbar 40. The pre-compression assembly 20 can be used for pre-compression when the entire clamping mechanism 100 moves downward, preventing damage to components such as the busbar 40 during rigid downward movement. The rotation assembly 30 can be used to adjust the angle of the clamping assembly 10, enabling angle adjustment during the clamping process. The addition of the protection mechanism 60 allows for real-time adjustments based on problems encountered during clamping, ensuring the accuracy and reliability of the clamping.

[0047] Understandably, the entire clamping mechanism 100 can be mounted on a machine operating table during use. When clamping and assembling the busbar 40, the clamping assembly 10 can first be moved above the busbar 40 to be clamped. Then, the clamping assembly 10 is controlled to move downwards until the clamping part of the clamping assembly 10 is delivered to the outside of the column. Then, the clamping assembly 10 is controlled to switch from the first working state to the second working state, and the clamping part moves inwards and clamps the outer wall of the column, thereby achieving the clamping of the busbar 40. Next, the clamping assembly 10, together with the lower clamped busbar 40, is moved above the motor to be installed. After determining the installation angle, the rotating assembly 30 is controlled to drive the clamping assembly 10 to rotate and move it downwards into the motor. Finally, the clamping assembly 10 is controlled to switch from the second state to the first state, and the clamping part disengages from the outer wall of the column, thereby releasing the busbar 40.

[0048] It should be noted that, considering the possibility of clamping deviation, clamping failure, or slippage during the clamping process, the protection mechanism 60 can determine and adjust the clamping state of the clamping component 10. Specifically, when the clamping part of the clamping component 10 clamps the column, if clamping deviation occurs, the clamping component 10 can be controlled to switch from the second state to the first state. Then, the rotating component 30 is controlled to rotate the clamping component 10. After rotation, the clamping component 10 is controlled to switch from the first working state to the second working state to achieve secondary clamping... and so on, until the protection mechanism 60 determines that the clamping is correct before moving the busbar 40 and performing subsequent related operations. The entire clamping mechanism has a protection mechanism to prevent clamping failure and slippage.

[0049] In some embodiments of this utility model, referring to Figures 1 to 7, the clamping assembly 10 includes a clamping cylinder 11, a three-jaw chuck 12, a limiting bracket 13, and a connecting member 14. The fixed end of the clamping cylinder 11 is connected to the pre-pressing assembly 20. The three-jaw chuck 12 is installed on the output end of the clamping cylinder 11, and the inner sidewall of the three-jaw chuck 12 cooperates with the outer sidewall of the upper column of the busbar 40. The limiting bracket 13 has a first through hole 131 at its center, and the outer sidewall of the limiting bracket 13 has a U-shaped groove 132 that cooperates with the upper column of the busbar 40. The connecting member 14 has a second through hole 141 at its center, and the connecting member 14 is arranged below the limiting bracket 13. The connecting member 14 is connected to the clamping cylinder 11 through a connecting rod 50. The clamping part of the three-jaw chuck 12 passes through the first through hole 131 and the second through hole 141 in sequence and extends to the bottom of the connecting member 14.

[0050] For example, the clamping cylinder 11 and the three-jaw chuck 12 can be existing commonly used three-jaw clamps. By controlling the clamping cylinder 11, the three jaws in the three-jaw chuck 12 can be synchronously controlled, allowing the three jaws to move synchronously inward or outward. The clamping space formed by the three jaws matches the outer wall of the column. To ensure a uniform distribution of clamping force, the three jaws are evenly distributed along the circumferential direction of the clamping cylinder 11. The limiting bracket 13 can be a limiting plate with a certain thickness. The first through hole 131 is opened at the center of the limiting plate. The outer side of the limiting plate has three protrusions, each of which has a U-shaped groove 132 that matches the column 42. The three U-shaped grooves 132 can be engaged with the three columns 42 on the busbar 40 one by one. The connecting member 14 can be a circular cylindrical structure. The connecting rod 50 can pass through the connecting member 14, the limiting bracket 13, the clamping cylinder 11, and connect to the pre-compression assembly 20 in sequence.

[0051] Under normal circumstances, the bottom end (i.e., the clamping part) of the three-jaw chuck 12 extends below the connector 14. When clamping the busbar 40, depending on the position of the column, the rotating component 30 can be controlled to rotate the entire clamping mechanism so that the U-shaped groove 132 aligns with the column. Then, the entire clamping mechanism is controlled to move downwards until the clamping part of the three-jaw chuck 12 moves to the column, and then the clamping cylinder 11 is controlled to work so that the three-jaw chuck 12 clamps the column, thereby achieving the clamping of the entire busbar 40. Of course, during the clamping process, if misalignment occurs under the action of the protection mechanism 60, the rotating component 30 and the clamping cylinder 11 can be controlled to work together to achieve precise and reliable clamping.

[0052] In some embodiments of this utility model, referring to Figures 1 to 7, the protection mechanism 60 includes a position sensor 61 mounted on the limiting bracket 13 and a plurality of torsion springs 62 mounted on the limiting bracket 13. The limiting bracket 13 has a plurality of fan-shaped annular holes 133 evenly distributed along its circumferential direction. There are a plurality of connecting rods 50, and the plurality of connecting rods 50 are arranged one-to-one in the fan-shaped annular holes 133. The upper end of the connecting rod 50 passes through the clamping cylinder 11 and is connected to the pre-pressing component 20, and the lower end of the connecting rod 50 is connected to the connecting member 14.

[0053] For example, a fan-shaped annular hole 133 is provided between any two adjacent columns on the limiting bracket 13. A torsion spring 62 is installed at each fan-shaped annular hole 133. A connecting rod 50 is inserted into each fan-shaped annular hole 133. There are three fan-shaped annular holes 133, torsion springs 62 and connecting rods 50. The connecting rods 50 pass through the fan-shaped annular holes 133 and are connected to the connector 14 and the clamping cylinder 11.

[0054] Understandably, when the three-jaw chuck 12 fails to hold, under the action of the rotating assembly 30, components such as the clamping cylinder 11, the three-jaw chuck 12, and the connecting piece 14 can continue to rotate, while the limiting bracket 13 does not rotate accordingly, and the connecting rod 50 can move within the fan-shaped annular hole 133. Under the action of the torsion spring 62, the range of rotation is limited; when the stroke of the torsion spring 62 is reached, rotation will stop. Under the action of the torsion spring 62, the relevant components reset, generating fine adjustments, enabling fine-tuning operations during the clamping and positioning process. Simultaneously, the position sensor 61 can detect whether the clamping is in place. If the clamping is not in place, adjustments can be made through the cooperation of various components until the clamping meets the requirements. Furthermore, the torsion spring 62 and the position sensor 61, by limiting the relative rotation stroke, also protect the entire clamping mechanism. Moreover, by generating a small torque after the torsion spring deforms, and then checking for placement by the position sensor before inserting the clamp, the accuracy of the clamping is improved.

[0055] In some embodiments of this utility model, referring to Figures 1 to 7, the pre-compression assembly 20 includes an upper connecting plate 21, a lower connecting plate 22, and guide posts 23. The lower connecting plate 22 is arranged below the upper connecting plate 21. There are multiple guide posts 23, which are installed between the lower connecting plate 22 and the upper connecting plate 21. Each guide post 23 is equipped with a spring 24. The clamping assembly 10 is installed at the bottom of the lower connecting plate 22. Under the action of the guide posts 23 and the springs 24, when downward pressure is applied from above the upper connecting plate 21, a certain buffer is generated on the lower connecting plate 22 and the assembly installed on the lower connecting plate 22, which plays a pre-compression role, avoids rigid clamping, and improves the overall performance.

[0056] In some embodiments of this utility model, referring to Figures 1 to 7, the rotating assembly 30 includes a mounting plate 31, a connecting frame 32, and a rotating motor 33. The connecting frame 32 defines a second receiving cavity that is open at both the top and bottom, and the connecting frame 32 is installed below the mounting plate 31. The rotating motor 33 is fixedly installed on the mounting plate 31, and the output end of the rotating motor 33 passes through the connecting frame 32 and is connected to the top of the pre-compression assembly 20.

[0057] For example, the rotary motor 33 is arranged with its movable end facing downwards, and the movable end of the rotary motor 33 can be rotatably mounted on the mounting plate 31 via a bearing seat. The connecting bracket 32 ​​is arranged outside the movable end, and its top is fixedly connected to the mounting plate 31. The movable end is fixedly connected to the preload assembly 20. When the rotary motor 33 is started, the movable end will drive the preload assembly 20 and the clamping assembly 10 below it to rotate synchronously, so as to adjust the clamping angle.

[0058] In summary, this utility model, through the cooperation between various components, can achieve precise clamping of the busbar, ensuring the reliability and stability of the clamping. The entire clamping mechanism has a protection mechanism to prevent clamping failure and slippage.

[0059] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 utility model.

[0060] Furthermore, the terms "first" and "second" are used 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 as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0061] In this utility model, unless otherwise explicitly 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 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. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0062] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through 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. "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.

[0063] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0064] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A clamping mechanism for a busbar for a motor, characterized in that, include: The clamping assembly is used to clamp the busbar; the pre-compression assembly is installed at the top of the clamping assembly; the rotating assembly is installed at the end of the pre-compression assembly away from the clamping assembly, and is used to drive the pre-compression assembly and the clamping assembly to rotate in their circumferential direction; wherein, the clamping assembly is provided with a protective mechanism, which works together with the clamping assembly to clamp the busbar.

2. The clamping mechanism for the busbar of a motor according to claim 1, characterized in that, The clamping assembly includes: a clamping cylinder, the fixed end of which is connected to the pre-compression assembly; a three-jaw chuck, which is mounted on the output end of the clamping cylinder, and the inner sidewall of the three-jaw chuck mates with the outer sidewall of the busbar column; a limiting bracket, which has a first through hole at its center and a U-shaped groove on its outer sidewall that mates with the busbar column; and a connector, which has a second through hole at its center and is located below the limiting bracket, and is connected to the clamping cylinder via a connecting rod; wherein the clamping part of the three-jaw chuck passes through the first through hole and the second through hole in sequence and extends to the bottom of the connector.

3. The clamping mechanism for the busbar of a motor according to claim 2, characterized in that, The protection mechanism includes a position sensor mounted on the limiting bracket, multiple torsion springs mounted on the limiting bracket, and multiple fan-shaped annular holes opened on the limiting bracket. The multiple fan-shaped annular holes are evenly distributed along the circumferential direction of the limiting bracket. There are multiple connecting rods, and the multiple connecting rods are arranged one-to-one in the fan-shaped annular holes. The upper end of the connecting rod passes through the clamping cylinder and is connected to the pre-compression assembly, and the lower end of the connecting rod is connected to the connecting piece.

4. The clamping mechanism for the busbar of a motor according to claim 1, characterized in that, The pre-compression assembly includes: an upper connecting plate; a lower connecting plate arranged below the upper connecting plate; and multiple guide posts installed between the lower connecting plate and the upper connecting plate, each guide post being equipped with a spring; wherein the clamping assembly is installed at the bottom of the lower connecting plate.

5. The clamping mechanism for the busbar of a motor according to claim 1, characterized in that, The rotating assembly includes: a mounting plate; a connecting frame defining a second receiving cavity that is open at both the top and bottom, the connecting frame being mounted below the mounting plate; and a rotating motor fixedly mounted on the mounting plate, the output end of the rotating motor passing through the connecting frame and connected to the top of the pre-compression assembly.

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