Device for glue filling of servo motor

Abstract

The utility model relates to the field of glue filling of servo motors, in particular to a device for glue filling of a servo motor, which comprises a thermal expansion packed column, a baffle ring and a separator, the thermal expansion packed column comprises an expansion column and a spoiler, the end part of the expansion column is connected with the spoiler, and the spoiler is used for shielding an opening at one side of a shell of the servo motor; the baffle ring is detachably connected with the end, away from the spoiler, of the expansion column. The baffle ring can abut against the stator. The isolation piece is arranged on the expansion column in a sleeving mode, the isolation piece can abut against the spoiler, and the shape of the isolation piece is matched with that of the spoiler; the thermal expansion packed column has the characteristic of thermal expansion and cold contraction, the thermal expansion packed column in a heating state can eliminate a gap between the stator and the thermal expansion packed column, the cooled thermal expansion packed column is easier to separate from the inner wall of the stator, manpower consumption is reduced, the requirement for machining precision of the thermal expansion packed column is low, and machining cost is reduced. The thermal expansion packed column is convenient to assemble and disassemble on the stator, and the glue filling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of servo motor potting, in particular to a device for servo motor potting. Background Technique

[0002] The stator of a servo motor is a cylindrical structural member composed of several silicon steel sheets. To ensure the stability of the stator during operation, glue needs to be poured into the stator for fixation.

[0003] As Figure 1 shown, currently, the method for potting the stator of a servo motor is as follows: install a base at one end of the servo motor housing, install a filling steel column at the center of the stator, set a cover plate at the other end of the servo motor housing, tightly connect the base, the filling steel column, and the cover plate through bolts, and then heat, evacuate, and pot the stator.

[0004] However, the requirements for the filling steel column in servo motor potting are relatively high. It is necessary to ensure a high degree of fit between the filling steel column and the inner wall of the stator. If the tolerance of the filling steel column is small, glue overflow will occur, and if the tolerance of the filling steel column is large, it cannot be inserted into the stator. The installation and disassembly of the filling steel column on the stator are difficult, and a large amount of time is spent on the installation operation of the filling steel column, resulting in a slow progress of the potting process. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiency in the prior art that the installation and disassembly of the filling steel column are difficult, resulting in a slow progress of the potting process, and to provide a device for servo motor potting.

[0006] The utility model provides a device for servo motor potting, including

[0007] a thermal expansion filling column, the thermal expansion filling column includes an expansion column and a flow blocking plate, the end of the expansion column is connected to the flow blocking plate, and the flow blocking plate is used to shield an opening on one side of the servo motor housing;

[0008] a retaining ring, the retaining ring is detachably connected to the end of the expansion column away from the flow blocking plate; the retaining ring can be in contact with the stator;

[0009] an isolation member, the isolation member is sleeved on the expansion column, the isolation member can be in contact with the flow blocking plate, and the shape of the isolation member is adapted to the shape of the flow blocking plate.

[0010] A device for potting a servo motor. The thermal expansion filling column has the property of thermal expansion and contraction. When installing and disassembling the thermal expansion filling column on the servo motor housing, there is a certain gap between the inner wall of the stator and the expansion column, making it easier to install and disassemble the expansion column in the stator. After the expansion column is heated, it expands and abuts against the inner wall of the stator, eliminating the gap between the stator and the expansion column, thereby avoiding the appearance of glue in the rotor installation channel. The shape of the baffle is adapted to the opening shape of the servo motor housing, so that after the baffle is installed on the servo motor housing, one end of the servo motor housing is closed, preventing glue from leaking during potting. The retaining ring is connected to the expansion column and abuts against the stator, fixing the expansion column in the stator. The isolation member prevents the glue from bonding to the baffle, making it easy to remove the thermal expansion filling column from the servo motor housing. The device for potting the servo motor can be quickly installed and disassembled on the servo motor housing, improving the potting efficiency of the stator.

[0011] Preferably, the baffle is a circular plate, and the axis of the baffle is collinear with the axis of the expansion column.

[0012] The circular plate is adapted to the circular opening shape of the servo motor housing, ensuring good sealing between the circular plate and the servo motor housing and preventing glue from leaking.

[0013] Preferably, the diameter of the retaining ring is greater than the diameter of the expansion column, and the diameter of the retaining ring is less than the diameter of the baffle.

[0014] After the retaining ring is installed, it abuts against the end of the stator. The diameter of the retaining ring is less than the diameter of the opening of the servo motor housing, so that the gap between the retaining ring and the servo motor housing is used for pouring glue into the stator.

[0015] Preferably, the isolation member is an annular member, the outer diameter of the isolation member is the same as the diameter of the baffle, and the inner diameter of the isolation member is the same as the diameter of the expansion column.

[0016] The isolation member is clamped by the stator and the baffle, which can prevent the glue from contacting the baffle and make it easy to separate the baffle from the servo motor housing after the glue is cured.

[0017] Preferably, the side of the isolation member away from the baffle is configured as a smooth surface.

[0018] The smooth surface provided on the isolation member makes it easy to separate the isolation member from the solidified glue, facilitating tearing off after potting is completed.

[0019] Preferably, a connecting column is provided at the end of the expansion column, a connecting hole is provided on the retaining ring, the connecting hole is adapted to be connected to the connecting column, and the connecting column is detachably connected to the retaining ring.

[0020] The retaining ring and the baffle plate limit the thermal expansion column so that the thermal expansion column can be installed at a specified position of the stator. The connecting column is coaxially arranged with the thermal expansion column to facilitate the installation of the retaining ring. The connecting hole is opened in the middle of the retaining ring so that the retaining ring can abut the end of the stator to apply a balanced force to the stator.

[0021] Preferably, the connection column is provided with a limiting hole, the limiting hole is detachably connected to a plug, and the plug can abut against the retaining ring.

[0022] The latch is inserted into the limiting hole so that the latch limits the retaining ring, ensuring that the retaining ring abuts against the stator, so that the isolating member is clamped by the spoiler and the stator to avoid contact between the glue and the spoiler; the latch is easy to install and disassemble, which facilitates the installation and disassembly of the thermal expansion filling column on the servo motor housing.

[0023] Preferably, the length of the latch pin is smaller than the diameter of the retaining ring.

[0024] Avoid excessively long pins that may block the glue from entering the stator and prevent glue from sticking to the pins.

[0025] Preferably, the thermal expansion filling column and the retaining ring are both polytetrafluoroethylene structural parts; and the isolation member is release paper.

[0026] PTFE structural parts can expand quickly under heating conditions and recover after cooling; release paper is easy to tear off from the solidified glue.

[0027] Preferably, the expansion column and the spoiler are an integrally formed structural component.

[0028] The connection strength between the expansion column and the baffle is strengthened to make the thermal expansion filling column easier to use.

[0029] Compared with the prior art, the utility model has the following beneficial effects:

[0030] 1. The utility model discloses a device for glue pouring into a servo motor. The heat expansion filling column has the characteristics of thermal expansion and contraction. When the heat expansion filling column is installed and removed from the servo motor housing, a certain gap is provided between the inner wall of the stator and the expansion column, so that the expansion column is easier to install and remove in the stator; the expansion column expands after being heated, so that the expansion column abuts against the inner wall of the stator, eliminating the gap between the stator and the expansion column, thereby avoiding the presence of glue in the rotor installation channel; the shape of the spoiler is adapted to the opening shape of the servo motor housing, so that after the spoiler is installed in the servo motor housing, one end of the servo motor housing is closed to avoid glue leakage during glue pouring; the retaining ring abuts against the stator after being connected to the expansion column, so that the expansion column is fixed in the stator; the isolation piece is used to prevent glue from adhering to the spoiler, so that the heat expansion filling column is easy to remove from the servo motor housing; the device for glue pouring into a servo motor can be quickly installed and disassembled on the servo motor housing, thereby improving the glue pouring efficiency of the stator;

[0031] 2. The device for servo motor potting of the present utility model is convenient to use. The thermal expansion filling column has the property of thermal expansion and contraction. After the thermal expansion filling column expands, the gap between the thermal expansion filling column and the inner wall of the stator is eliminated, preventing glue from entering the installation space of the rotor, thereby avoiding the contamination of the inner wall of the stator by glue during the potting process and enhancing the cleanliness inside the stator. After the thermal expansion filling column cools down, it separates from the inner wall of the stator, enabling the thermal expansion filling column to be quickly separated from the stator. The thermal expansion filling column is convenient to load and unload on the stator, improving the potting efficiency. The processing accuracy requirement for the thermal expansion filling column is relatively low, reducing the processing cost, and having good economic value and practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 FIG. 6 is a schematic structural diagram of a prior art servo motor stator potting device;

[0033] Figure 2 FIG. 10 is a schematic structural diagram of a device for servo motor potting of the present utility model;

[0034] Figure 3 FIG. 14 is a schematic structural diagram of the thermal expansion filling column of the present utility model;

[0035] Figure 4 FIG. 18 is a schematic structural diagram of the retaining ring of the present utility model;

[0036] Figure 5 FIG. 22 is a schematic structural diagram of the spacer of the present utility model;

[0037] Figure 6 FIG. 26 is a schematic diagram of the use state of a device for servo motor potting of the present utility model.

[0038] Reference numerals in the figures:

[0039] 100 - Servo motor housing, 1 - Thermal expansion filling column, 2 - Flow blocking plate, 3 - Spacer, 4 - Retaining ring, 5 - Plug, 6 - Limit hole, 7 - Connecting column, 8 - Connecting hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] The present utility model will be further described in detail below in conjunction with specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present utility model to the following embodiments. Any technology implemented based on the content of the present utility model falls within the scope of the present utility model.

[0041] Unless otherwise specified, in the description of the specific embodiments of the present utility model, the expression terms indicating the orientation or positional relationship such as "upper", "lower", "left", "right", "center", "inner", "outer", etc. are all based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the utility model product / device / assembly is habitually used. These terms of orientation or positional relationship are only for the convenience of describing the solution of the present utility model or simplifying the description in the specific embodiments, facilitating technicians to quickly understand the solution, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, it should not be construed as a limitation to the present utility model.

[0042] In addition, if terms such as "horizontal", "vertical", "hanging", "parallel" appear, it does not mean that the corresponding device / component / element is required to be absolutely horizontal or vertical or hanging or parallel, but it can be slightly inclined or have a deviation. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but it can be slightly inclined. Or, it can be simply understood that the corresponding device / component / element is arranged in the directions of "horizontal", "vertical", "hanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the solution of the present utility model.

[0043] In addition, when expressions such as "first", "second", "third", etc. appear in the terms, they are only used to distinguish the description of the same or similar components, and should not be construed as emphasizing or implying the relative importance of specific components.

[0044] In addition, in the description of the embodiments of the present utility model, "several", "multiple", "a number of" represent at least 2. It can be any situation such as 2, 3, 4, 5, 6, 7, 8, 9, etc., and even can be a situation of more than 9.

[0045] In addition, in the description of the technical solution of the present utility model, unless otherwise clearly specified / defined / restricted, where terms such as "set", "installed", "connected", "linked", "provided with", "laid", "arranged" appear, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be connection means commonly used in the art such as welding, riveting, bolting, screw connection, etc. This connection can be a mechanical connection, an electrical connection or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements.

[0046] Example 1

[0047] As Figures 2 - 6 shown, a device for potting a servo motor, characterized by comprising

[0048] a thermal expansion filling column, the thermal expansion filling column includes an expansion column 1 and a flow blocking plate 2, one end of the expansion column 1 is connected to the flow blocking plate 2, and the flow blocking plate 2 is used to shield an opening on one side of the servo motor housing 100;

[0049] a retaining ring 4, the retaining ring 4 is detachably connected to the end of the expansion column 1 away from the flow blocking plate 2; the retaining ring 4 can abut against the stator;

[0050] an isolating member 3, the isolating member 3 is sleeved on the expansion column 1, the isolating member 3 can abut against the flow blocking plate 2, and the shape of the isolating member 3 is adapted to the shape of the flow blocking plate 2.

[0051] The thermal expansion filling column has the property of thermal expansion and contraction. When the thermal expansion filling column is installed and removed from the servo motor housing 100, there is a certain gap between the inner wall of the stator and the expansion column 1, making it easier to install and remove the expansion column 1 in the stator; when the expansion column 1 is heated, it expands, so that the expansion column 1 abuts against the inner wall of the stator, eliminating the gap between the stator and the expansion column 1, thereby avoiding glue in the rotor installation channel; the shape of the flow blocking plate 2 is adapted to the shape of the opening of the servo motor housing 100, so that after the flow blocking plate 2 is installed on the servo motor housing 100, one end of the servo motor housing 100 is closed, preventing glue from leaking during potting; after the retaining ring 4 is connected to the expansion column 1, it abuts against the stator, fixing the expansion column 1 in the stator; the isolating member 3 prevents glue from bonding the flow blocking plate 2, making it easy to take out the thermal expansion filling column from the servo motor housing 100; the device for potting a servo motor can be quickly installed and removed on the servo motor housing 100, improving the potting efficiency of the stator.

[0052] In one or several embodiments, the flow blocking plate 2 is a circular plate adapted to the end of the servo motor housing 100, and the flow blocking plate 2 is connected to the expansion column 1 with their axes collinear, so that when the expansion column 1 enters the stator in any direction, the flow blocking plate 2 can be tightly connected to the servo motor housing 100, thus ensuring the sealing between the flow blocking plate 2 and the servo motor housing 100 and preventing glue leakage; improving the usability of the thermal expansion filling column.

[0053] In an optional embodiment, the diameter of the retaining ring 4 is larger than the diameter of the expansion column 1, and the diameter of the retaining ring 4 is smaller than the diameter of the flow blocking plate 2; the retaining ring 4 can abut against the stator, so that the retaining ring 4 plays a good fixing role for the expansion column 1, and there is a gap between the retaining ring 4 and the servo motor housing 100 as an opening for glue to enter, facilitating potting.

[0054] In an alternative embodiment, the spacer 3 is an annular member. The outer diameter of the spacer 3 is the same as the diameter of the circular plate, and the inner diameter of the spacer 3 is the same as the diameter of the thermal expansion filling column. The expansion column 1 passes through the inner ring of the spacer 3. The spacer 3 is a release paper, and both sides of the release paper are smooth surfaces, which is convenient for tearing off from the cured glue. The release paper isolates the baffle 2 from the glue, making it easier to disassemble the thermal expansion filling column from the servo motor housing 100.

[0055] In one or several embodiments, a connecting column 7 is provided at the end of the expansion column 1. The retaining ring 4 is provided with a connecting hole 8, and the connecting hole 8 is adaptively connected to the connecting column 7. The connecting column 7 is detachably connected to the retaining ring 4, and the retaining ring 4 can abut against the stator. A limiting hole 6 is provided in the connecting column 7, and the limiting hole 6 is detachably connected to a pin 5, and the pin 5 can abut against the retaining ring 4. The length of the pin 5 is less than the diameter of the retaining ring 4. By inserting the connecting column 7 into the retaining ring 4, the pin 5 is inserted into the limiting hole 6 to prevent the retaining ring 4 from detaching from the connecting column 7, which is convenient for the installation and disassembly of the retaining ring 4.

[0056] In one or several embodiments, the thermal expansion filling column is a polytetrafluoroethylene structural member. The polytetrafluoroethylene structural member can expand rapidly under heated conditions and recover after cooling. The retaining ring 4 is also a polytetrafluoroethylene structural member.

[0057] In one or several embodiments, the expansion column 1 and the baffle 2 are integrally formed structural members, which strengthens the structural strength of the thermal expansion filling column and makes the thermal expansion filling column convenient to use.

[0058] A device for servo motor potting of the present utility model has three sections of steps. The first section of step is the baffle 2 that blocks the overflow of the potting glue. The second section of step is the expansion column 1 that abuts against the inner wall of the stator to prevent the potting glue from flowing into the rotor channel through the gap between the silicon steel sheets. The third section is the connecting column 7 passing through the retaining ring 4. A φ4 through hole is provided on the connecting column 7 as the limiting hole 6, and the baffle is fixed to the filling column by the pin 5. The diameter of the expansion column 1 is slightly smaller than the diameter of the vacant section of the stator, which is convenient for easy insertion during installation.

[0059] The inner diameter of the release paper as the spacer 3 is the same as the diameter of the expansion column 1. After the release paper is installed, it abuts against the baffle 2 in contact, ensuring that the bottom baffle 2 will not be contaminated by the glue. The release paper has a high smoothness. After the potting glue solidifies, the release paper can be easily torn off from the potting glue, which not only ensures the flatness of the bottom surface of the potting glue but also ensures the cleanliness of the baffle 2. It avoids the potting glue from contaminating the baffle 2 and realizes the reuse of the thermal expansion filling column.

[0060] The retaining ring 4 is a ring-shaped part made of polytetrafluoroethylene. The inner diameter of the retaining ring 4 is slightly larger than the diameter of the connecting column 7, so that the retaining ring 4 can be more easily installed and removed from the connecting column 7; the outer diameter of the retaining ring 4 is larger than the diameter of the expansion column 1, and the outer diameter of the retaining ring 4 is larger than the outer diameter of the stator. The retaining ring 4 abuts against the end of the stator to prevent glue from contaminating the area inside the stator where the rotor is installed.

[0061] After the expansion column is inserted into the servo motor stator, the spoiler 2 is adapted to be connected with the servo motor housing 100 to achieve sealing, and the pin 5 limits the retaining ring 4 so that the retaining ring 4 and the spoiler 2 respectively abut against the two ends of the stator, and the spoiler 2 is adapted to the opening of the servo motor housing 100 to avoid glue leakage; after the expansion column 1 is heated and expanded, it contacts the silicon steel sheet on the inner wall of the stator.

[0062] The utility model discloses a method of using a device for glue filling of a servo motor:

[0063] Pass the release paper through the expansion column 1 to fit the release paper to the spoiler 2, ensuring that the release paper is smooth and has no protrusions.

[0064] Insert the expansion column 1 with the release paper installed into the motor stator. Since the expansion column 1 is slightly smaller than the inner diameter of the motor stator, it can be easily inserted.

[0065] Connect the retaining ring 4 to the connecting column 7, insert the latch 5 into the limiting hole 6, and make the retaining ring 4 abut against the motor stator to ensure stability.

[0066] After the installation is completed, the servo motor housing 100 with the heat expansion filling column is placed in a temperature oven and baked for ten minutes. The high temperature will cause the heat expansion filling column and the retaining ring 4 to expand, so that the inside of the stator is completely filled, preventing glue from flowing into the installation space of the rotor.

[0067] The glue is cured after vacuuming and glue pouring, and then heated in a reheating oven for two hours.

[0068] After the servo motor housing 100 is taken out of the reheating furnace, it is naturally cooled for 10 minutes. As the temperature decreases, the volume of the thermally expanded filling column decreases, and the servo motor housing 100 can be easily taken out of the stator.

[0069] Tear off the release paper. The thermal expansion filling column is not contaminated by glue and can be reused after replacing the release paper.

[0070] The thermal expansion filling column has the characteristics of thermal expansion and contraction. After the thermal expansion filling column expands, the gap between the thermal expansion filling column and the inner wall of the stator is eliminated, preventing glue from entering the installation space of the rotor, thereby preventing the inner wall of the stator from being contaminated by glue during the glue pouring process, thereby enhancing the cleanliness of the inside of the stator; the thermal expansion filling column is separated from the inner wall of the stator after cooling, so that the thermal expansion filling column can be quickly separated from the stator, and the thermal expansion filling column is easy to load and unload on the stator, thereby improving the glue pouring efficiency; the thermal expansion filling column has low processing accuracy requirements, reducing processing costs.

[0071] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A device for potting a servo motor, characterized in that, including a thermal expansion filling column, the thermal expansion filling column includes an expansion column (1) and a flow blocking plate (2), the end of the expansion column (1) is connected to the flow blocking plate (2), and the flow blocking plate (2) is used to shield an opening on one side of the servo motor housing (100); a retaining ring (4), the retaining ring (4) is detachably connected to the end of the expansion column (1) away from the flow blocking plate (2); the retaining ring (4) can abut against the stator; an isolation member (3), the isolation member (3) is sleeved on the expansion column (1), the isolation member (3) can abut against the flow blocking plate (2), and the shape of the isolation member (3) is adapted to the shape of the flow blocking plate (2).

2. The device for servo motor potting according to claim 1, characterized in that, The flow blocking plate (2) is a circular plate, and the axis of the flow blocking plate (2) is collinear with the axis of the expansion column (1).

3. The device for potting a servo motor according to claim 2, wherein, The diameter of the retaining ring (4) is greater than the diameter of the expansion column (1), and the diameter of the retaining ring (4) is less than the diameter of the flow blocking plate (2).

4. A device for potting a servo motor according to claim 2, characterized in that, The isolation member (3) is an annular member, the outer diameter of the isolation member (3) is the same as the diameter of the flow blocking plate (2), and the inner diameter of the isolation member (3) is the same as the diameter of the expansion column (1).

5. The device for potting a servo motor according to claim 4, characterized in that, The side of the isolation member (3) away from the flow blocking plate (2) is configured as a smooth surface.

6. The device for potting a servo motor according to claim 1, characterized in that, A connecting column (7) is provided at the end of the expansion column (1), a connecting hole (8) is formed in the retaining ring (4), the connecting hole (8) is adaptively connected to the connecting column (7), and the connecting column (7) is detachably connected to the retaining ring (4).

7. The device for potting a servo motor according to claim 6, characterized in that, A limiting hole (6) is formed in the connecting column (7), the limiting hole (6) is detachably connected to a plug pin (5), and the plug pin (5) can abut against the retaining ring (4).

8. A device for potting a servo motor according to claim 7, wherein, The length of the plug pin (5) is less than the diameter of the retaining ring (4).

9. The device for potting a servo motor according to claim 1, wherein, Both the thermal expansion filling column and the retaining ring (4) are polytetrafluoroethylene structural parts; the isolation member (3) is release paper.

10. A device for potting a servo motor according to any one of claims 1-9, characterized in that, The expansion column (1) and the flow blocking plate (2) are integrally formed structural parts.

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