Motor driver, multi-function screw for mounting the motor driver, and lifting bracket for the motor driver.

Abstract

This invention relates to a multi-functional screw for mounting a motor driver, the screw extending between the front and rear sides of the motor driver and including a head (1), a guide portion (2), a travel limit portion (3), an abutment portion (4), and a threaded portion (5), wherein these portions are spaced apart from each other in the axial direction of the screw. This invention also relates to a lifting bracket for a motor driver, the lifting bracket being connected to the multi-functional screw. This invention further relates to a motor driver including a multi-functional screw, the motor driver including at least one driver guide portion for guiding the screw near at least one of its two ends and / or near the center portion of the screw.

Description

Technical Field

[0001] This utility model relates to a multi-functional screw for mounting a motor driver to a lifting bracket. The screw extends between the front and rear sides of the driver and includes a head, a guide portion, a travel limit portion, an abutment portion, and a threaded portion. All of these portions are spaced apart from each other in the axial direction of the screw. This utility model also relates to a lifting bracket for a motor driver and a motor driver including this multi-functional screw. Background Technology

[0002] In motor drives, screws are typically used to secure the drive to an external structure and / or to hold drive components together. Because drives can often be quite large, the use of screws can present several problems.

[0003] For example, a screw might be located near the rear wall of the drive, while the tool used to turn the screw must be operated near the opposite front wall of the drive. Since drives can typically be 600 mm or deeper, correctly aligning the tool can be extremely difficult.

[0004] Due to the size and often complex geometry of the drive, maintenance personnel may need to use a sufficiently long special adapter to turn the screws. Such a special adapter may not be readily available at the customer's site where the drive is being maintained.

[0005] In addition, the size of the drive makes it difficult for maintenance personnel located on the front wall of the drive to clearly see the screws on the rear wall of the drive, thus making it difficult for maintenance personnel to operate the screws.

[0006] Finally, because screws are difficult to see and manipulate inside the drive, there is a high risk that screws may fall into the drive, causing damage and / or requiring significant rework time to remove them. A magnet can be used on the side of the tool to prevent screws from falling into the drive. Utility Model Content

[0007] The purpose of this invention is to overcome these problems by providing screws that are easier to use in maintenance activities, a lifting bracket for a motor drive, and a motor drive. This purpose is achieved by the screws, lifting bracket, and motor drive according to this invention.

[0008] This invention provides a multi-functional screw for mounting a motor driver to a lifting bracket. The screw extends between the front and rear sides of the driver and includes a head, a guide portion, a travel limit portion, an abutment portion, and a threaded portion. All these portions are spaced apart from each other in the axial direction of the screw. This means they may not overlap or combine with each other. They represent different parts of the screw. All parts of the screw may be integrally formed, or some or all parts of the screw may be assembled from individual parts.

[0009] This invention provides a screw that can be operated (i.e., removed and tightened) with standard tools without any special adapter tools. The screw is designed so that it will not fall into the drive during operation. Due to its shape, the screw can be easily accessed from, for example, the front side of the drive. The screw can be quickly and easily aligned, and the travel distance during screwing in and out is easily controlled.

[0010] Therefore, on-site maintenance workload can be significantly reduced, thereby improving drive maintainability and / or drive replaceability. Maintenance personnel will typically require less effort, time, and process steps when servicing drives, thus also reducing maintainability costs.

[0011] In a preferred embodiment of this invention, the travel limiting portion and the abutment portion have the largest outer diameter of all parts of the screw. At least one of these portions may be integrally formed with the rest of the screw, or may be a separate part connected to the screw by, for example, an interference fit.

[0012] In another preferred embodiment of this invention, a tapered portion is provided at the opposite end of the head and / or adjacent to the threaded portion. This tapered portion facilitates the insertion of screws into the openings of the motor drive and / or the lifting bracket and / or any structure required to secure the motor drive.

[0013] In another preferred embodiment of the present invention, the head includes an external hexagonal head. Alternative head shapes (such as square heads and / or slotted heads) are also within the scope of the present invention. In a particularly preferred embodiment, the diameter of the head is smaller than the diameter of the adjacent guide portion.

[0014] In another preferred embodiment of this invention, the travel limiting portion is located at or near the center of the screw. The travel limiting portion can be positioned at any axial location of the screw suitable for a given motor drive geometry.

[0015] This utility model also relates to a lifting bracket for a motor driver, which is connected to a multi-functional screw.

[0016] This utility model also relates to a motor driver that includes a multifunctional screw, wherein the driver includes at least one driver guide for guiding the screw near at least one of the two ends of the screw and / or near the central portion of the screw. Attached Figure Description

[0017] Further details and advantages of this utility model will be disclosed with reference to the accompanying drawings. The drawings show:

[0018] Figure 1 Various views of the multifunctional screw of this utility model;

[0019] Figures 2a to 2c Various views of a motor driver with a multi-functional screw; and

[0020] Figure 3 Cross-sectional view of the multi-functional screw inside the motor driver. Detailed Implementation

[0021] Figure 1 Views (a) through (d) show various embodiments of the multi-functional screw of this invention. The multi-functional screw is used to mount a motor driver to, for example, a lifting bracket. The term "lifting bracket" can be interpreted broadly and can refer to any structure to which the motor driver is to be connected.

[0022] The multi-functional screw includes a head 1, a guide portion 2, a travel limit portion 3, a stop portion 4, and a threaded portion 5. These parts of the screw can be arranged in this order. The guide portion 2 may include two sub-parts, which can be disposed on both sides of the limit portion 3, as shown in the figure.

[0023] All these parts can be spaced apart from each other in the axial direction of the screw. The axial direction corresponds to... Figure 1 The horizontal direction in the diagram is also the direction in which the screw is inserted into the motor driver.

[0024] All or some of the parts of a screw may not overlap each other and may not be assembled together. They represent different parts of the screw. All parts of a screw may be integrally formed, or some or all of the parts of a screw may be assembled from discrete parts to form a multifunctional screw. At least some parts of a screw may include or be composed of rotationally symmetric bodies.

[0025] exist Figure 1 In this embodiment, the travel limiting portion 3 and the abutment portion 4 have the largest outer diameter of all parts of the screw. The travel limiting portion 3 and the abutment portion 4 may have the same outer diameter and / or may be cylindrical or any other shape, such as square or hexagonal.

[0026] At least one of the limiting part 3 and the abutting part 4 may be integrally formed with the rest of the screw, or may be a separate part connected to the screw by, for example, an interference fit.

[0027] A tapered portion 6 may be provided at the opposite end of the head 1 and / or adjacent to the threaded portion 5. The tapered portion 6 facilitates the insertion of screws into openings in the motor drive and / or lifting bracket and / or any structure required to secure the motor drive. The tapered portion 6 may be conical or truncated conical. The tapered portion 6 facilitates initial alignment of the screw with the opening, making it easier for the threaded portion 5 to engage with adjacent structures, such as the lifting bracket.

[0028] The head 1 may include an external hexagonal head. Alternative head shapes (such as square heads and / or slotted heads) are also within the scope of this invention. The diameter of the head 1 may be smaller than the diameter of the adjacent guide 2. The head 1 may be shaped for attaching a screw to a tool, thereby allowing the screw to be turned by the tool. The tool may be any suitable standard tool, and does not need to be a special tool. The shape of the screw and its head 1 allows the tool itself to be easily accessible from the front of the drive.

[0029] The travel limit part 3 can be located at or near the center of the screw. The travel limit part 3 can be set on the screw at any suitable axial position suitable for a given motor drive geometry.

[0030] Figures 2a to 2c Various views of a motor driver with a multi-functional screw are shown.

[0031] according to Figure 2a The multi-function screw is located between the front and rear sides of the driver (i.e., in...) Figure 2a (Extending vertically in the middle). The motor driver is shown in its assembled state; for clarity, the structures to which the motor driver is fixed are omitted.

[0032] The screw is shown penetrating the motor drive, with the threaded portion 5 and the tapered portion 6 protruding from the structure of the motor drive. This allows the screw to be attached to (i.e. screwed into) adjacent structures such as lifting brackets.

[0033] The driver includes at least one driver guide for guiding the screw near at least one of its two ends and / or near the center portion of the screw. The sides of the housing surrounding the driver may also function as guides.

[0034] The length of the screw is related to the depth of the motor driver. This means that even if the screw is fully inserted into the motor driver, the head 1 of the screw can still be easily reached by a tool.

[0035] Figure 2b The diagram shows the support structure where the travel limit part 3 may come into contact with or be close to the motor.

[0036] The length of the screw can be selected such that the head 1 can be partially or fully inserted into the structure of the motor drive. The screw is shaped so that it can be operated (i.e., removed and tightened) with standard tools without any special adapter tools.

[0037] The screws are shaped to make it virtually impossible for them to fall into the drive during operation. For example, their length is chosen so that they will not be lost inside the drive.

[0038] like Figure 2b and Figure 2c As shown, the screw can be easily accessed from, for example, the front side of the drive. The screw can be aligned quickly and easily, and the travel distance during screwing in and out is easy to control.

[0039] Therefore, the maintenance workload of the drive can be significantly reduced at the customer's site, thereby improving the maintainability and / or replaceability of the drive. Maintenance personnel will typically require less effort, time, and process steps when maintaining the drive, thus also reducing maintainability costs.

[0040] The lifting bracket of this invention can be connected to a multi-functional screw to secure the driver in place.

[0041] Figure 3 A cross-sectional view of a multi-functional screw inside a motor driver is shown. The screw is shown fully inserted into the motor driver. The screw head 1 can be fully or partially inserted into the driver. However, it can be located near the opening of the driver to facilitate access and turning of the screw using a tool.

[0042] The guide portion 2 can be guided by the guide hole 22 of the driver to align the screw inside the driver.

[0043] The travel limit portion 3 may be disposed adjacent to one or more travel limit abutment surfaces 23 of the drive. The travel limit abutment surface may be of any geometry. When the screw moves in its axial direction, the travel limit abutment surface limits the travel of the screw by abutting against the travel limit portion 3 of the screw. The travel limit portion 3 may limit the axial travel to, for example, 5 mm plus the length of the tapered portion 6.

[0044] The abutment 4 and the threaded portion 5 can be provided at the end of the screw opposite to its head 1. The threaded portion 5 is used to screw the screw into the lifting bracket 30, so that the abutment 4 can abut against the lifting bracket 30, thereby fixing the driver to the lifting bracket 30.

[0045] This invention provides a screw designed for better maintainability. It helps reduce the workload and rework risk for maintenance personnel performing preventative and / or fail-safe repairs.

[0046] In known solutions, aligning the tool and screw when turning the screw is extremely difficult. This is a consequence of the drive's considerable depth (approximately 600mm). Therefore, long, specialized adapter tools are typically required when maintenance personnel visit customer sites where the drive is being serviced. Furthermore, the screw's visibility is often obstructed because it is typically located approximately 500mm deep inside the drive.

[0047] The length of the screw in this invention can be selected according to the depth of the driver. Although typical screw lengths can be between 400mm and 600mm, longer or shorter screws are obviously also included within the scope of this invention.

[0048] This invention provides a multi-functional screw that allows for removal and installation without the need for any special adapter tools. The geometry of the multi-functional screw (particularly its length) prevents it from falling into the drive cabinet. Furthermore, the drive cabinet may include features to prevent the screw from falling in, such as abutment surfaces, guides, channels, planes, edges, and / or other surfaces.

[0049] Accessing the screw from the front of the actuator is significantly simplified and accelerated, as is the alignment of the screw with respect to the corresponding tool. The geometry of the screw allows for control over its travel distance. Overall, this invention reduces the maintainability costs and total cost of ownership of the actuator.

Claims

1. A multi-functional screw for mounting a motor driver, characterized in that, The screw extends between the front and rear sides of the motor driver and includes a head (1), a guide (2), a travel limit (3), a stop (4), and a threaded portion (5), wherein the head (1), the guide (2), the travel limit (3), the stop (4), and the threaded portion (5) are spaced apart from each other in the axial direction of the screw.

2. The multifunctional screw according to claim 1, characterized in that, The travel limiting part (3) and the abutting part (4) have the largest outer diameter among the head (1), the guide part (2), the travel limiting part (3), the abutting part (4) and the threaded part (5) of the screw.

3. The multifunctional screw according to claim 1 or 2, characterized in that, A tapered portion (6) is provided at the opposite end of the head (1) and / or adjacent to the threaded portion (5).

4. The multifunctional screw according to claim 1 or 2, characterized in that, The head (1) includes an external hexagonal head.

5. The multifunctional screw according to claim 1 or 2, characterized in that, The diameter of the head (1) is smaller than the diameter of the adjacent guide portion (2).

6. The multifunctional screw according to claim 1 or 2, characterized in that, The travel limit part (3) is located at or near the middle of the screw.

7. A lifting bracket for a motor driver, characterized in that, The lifting bracket is connected to the multifunctional screw according to any one of the preceding claims.

8. A motor driver comprising a multifunctional screw according to any one of claims 1 to 6, characterized in that, The motor driver includes at least one driver guide for guiding the screw near at least one of its two ends and / or near the center portion of the screw.

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