Shell flow channel structure and servo motor

Abstract

The invention discloses a shell flow channel structure and a servo motor, the shell flow channel structure comprises a closed heat dissipation cavity arranged on a shell, the heat dissipation cavity is axially divided into a heat absorption area in the middle and an inflow area and an outflow area on the two sides, and the inflow area and the outflow area are of annular structures surrounding the axis. And a plurality of runners which are mutually independent and are communicated with the inflow area and the outflow area in parallel are arranged in the heat absorption area. The machine shell is provided with an inflow connector communicated with the inflow area and an outflow connector communicated with the outflow area. According to the design, the long flow channel is divided into a plurality of independent and parallel short flow channels, so that the heat absorption efficiency and the heat dissipation uniformity of a cooling medium are improved, and the machining difficulty and the rejection rate of the complex long flow channel are reduced. Meanwhile, due to the design of the annular inflow / outflow area and the connector capable of being selectively plugged, the connection direction of an external pipeline can be flexibly adjusted, and the installation adaptability of the whole machine is enhanced. The servo motor comprising the shell runner structure has the advantages of high heat dissipation efficiency, compact structure and high reliability.

Description

Technical Field

[0001] This invention belongs to the field of servo motor heat dissipation structure design, specifically relating to a housing flow channel structure and a servo motor. Background Technology

[0002] Servo motors generate a significant amount of heat during operation. Inadequate heat dissipation can lead to paint peeling from the enameled wires, demagnetization of the magnets, and driver alarms, directly impacting equipment lifespan and reliability. Therefore, integrating cooling channels within the housing has become a crucial heat dissipation method for high-power or high-load servo motors. However, traditional housing channel designs (such as a single serpentine meandering channel) have significant limitations in terms of heat dissipation efficiency, manufacturing yield, and installation adaptability. Specifically:

[0003] 1. Traditional casing flow channel designs often prioritize the continuity and length of the flow channel to cover the heat dissipation surface. This results in an excessively long flow path for the cooling medium from inlet to outlet. The medium may approach temperature saturation in the first half of the flow channel, and the long flow in the second half is essentially "unnecessary work," with low heat absorption efficiency per unit distance, making it difficult to further improve the overall cooling effect.

[0004] 2. The long stroke and complex structure of a single flow path place extremely high demands on machining processes (such as deep hole drilling and long-distance milling). During machining, factors such as tool wear and machine tool vibration are amplified as the machining path lengthens, which can easily lead to dimensional deviations, unqualified surface quality, or even tool breakage, resulting in a high workpiece scrap rate and high production costs.

[0005] 3. In existing flow channel structures, the inlet and outlet interfaces are typically fixed at the beginning and end of the physical path of the flow channel. This design severely limits the layout flexibility of the servo motor in the overall equipment. When it is more convenient to connect external pipelines from other directions, the fixed interface positions often force the pipelines to make unnecessary bends, which not only increases the installation complexity but may also affect the system's aesthetics and ease of maintenance.

[0006] Therefore, there is an urgent need for a new type of shell flow channel structure that can achieve efficient heat dissipation, reduce processing difficulty, and improve installation adaptability within a limited space. Summary of the Invention

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution.

[0008] A housing flow channel structure includes a housing with a closed heat dissipation cavity. The heat dissipation cavity is divided along the axial direction of the housing into a central heat absorption zone and inflow and outflow zones located on either side. The inflow and outflow zones are annular structures arranged around the axis of the housing. The heat absorption zone contains at least two flow channels connecting the inflow and outflow zones, each flow channel being independent and parallel to the others. The housing has an inflow port connecting the inflow zone and an outflow port connecting the outflow zone.

[0009] As a preferred technical solution for a shell flow channel structure, the flow channel is a spiral flow channel.

[0010] As a preferred technical solution for a shell flow channel structure, the number of flow channels is 4 to 6.

[0011] As a preferred technical solution for the shell flow channel structure, there are multiple inflow and / or outflow interfaces, each inflow and / or outflow interface being configured to selectively connect to an external pipeline or be sealed by a sealing element.

[0012] As a preferred technical solution for the shell flow channel structure, the shell includes a main shell and a secondary shell, which are assembled to form the inflow area, the heat absorption area and the outflow area. The main shell is integrally formed from metal material, and the flow channel is formed on the outer peripheral surface of the main shell by machining.

[0013] A servo motor includes the aforementioned housing flow channel structure.

[0014] Compared with the prior art, this application has the following beneficial technical effects:

[0015] 1. The parallel multi-channel design significantly shortens the flow path of the cooling medium from the inlet to the outlet. This effectively reduces the "waste work" done by the medium in the latter half of the channel due to temperature saturation, maximizing the heat absorption efficiency of the medium per unit flow distance, thereby significantly improving the overall cooling effect.

[0016] 2. The parallel multi-channel design greatly shortens the channel stroke, reducing the probability of machining failure due to tool wear, vibration and other factors during machining (such as turning), thereby significantly reducing the scrap rate and improving production efficiency and economic benefits.

[0017] 3. The inflow and outflow areas are designed as annular cavities surrounding the axis, so that the connection positions of external pipelines (i.e., inflow / outflow interfaces) are no longer limited to the fixed beginning and end of the flow channel. Users can flexibly choose the most convenient interface position according to the spatial layout of the installation site.

[0018] 4. The spiral flow channel design provides good structural rigidity and avoids the leakage risk that may exist in the welding of multiple components.

[0019] 5. Multiple selectively openable / closeable inlet / outlet ports are provided on the casing. Users can flexibly choose the most convenient port location for connection according to the spatial layout of the installation site, while the remaining ports are blocked, which greatly improves the product's adaptability to different application scenarios and installation flexibility. Attached Figure Description

[0020] Figure 1 This is a 3D view of the casing.

[0021] Figure 2 This is an exploded view of the casing structure.

[0022] Figure 3 This is a plan view of the main shell.

[0023] Figure 4 This is a simplified diagram of the unfolded heat dissipation cavity.

[0024] Figure 5 This is a perspective view of the casing according to another embodiment.

[0025] 1. Main shell; 2. Secondary shell; 3. Flow channel; 4. Inflow area; 5. Outflow area; 6. Heat absorption area; 7. Inflow port; 8. Outflow port. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0027] In the following embodiments, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of this invention, it should be understood that terms such as center, longitudinal, transverse, length, width, thickness, upper, lower, front, rear, left, right, vertical, horizontal, top, bottom, inner, outer, clockwise, counterclockwise, etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing and simplifying the description of this invention; therefore, they should not be construed as limiting this invention. Furthermore, terms such as first, second, etc., 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 shown. In the description of this invention, unless otherwise expressly specified and limited, terms such as installation, connection, linking, etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Reference Figures 1 to 4This embodiment provides a housing flow channel structure. The housing includes a main housing 1 and a secondary housing 2. The main housing 1 is a generally cylindrical component, integrally cast from a metal material (such as cast iron, cast aluminum, or aluminum alloy). Both ends of the main housing 1 have mating surfaces. The secondary housing 2 is an annular cylindrical structure, with its inner diameter matching the outer diameter of the main housing 1. During assembly, the secondary housing 2 is fitted onto the mating surface area of ​​the main housing 1, and circumferential welding is performed using processes such as laser welding, so that the inner wall of the secondary housing 2 and the outer circumferential surface of the main housing 1 together form a closed heat dissipation cavity.

[0030] The enclosed heat dissipation cavity is divided into three functional areas along the axial direction: an inflow area 4 and an outflow area 5 on both sides, and a heat absorption area 6 in the middle. Multiple continuous spiral grooves are machined in the heat absorption area 6 using CNC milling or other machining methods. Each groove independently connects the inflow area 4 and the outflow area 5, and these grooves constitute the independent and parallel flow channels 3. These multiple flow channels 3 are equivalent to multiple parallel cooling units, significantly increasing the total flow rate of the cooling medium and the total heat dissipation area, thereby doubling the cooling capacity within the same space.

[0031] The design of the number of flow channels 3 needs to strike a balance between heat dissipation performance and process feasibility. If the number of flow channels 3 is too small (e.g., 1-3), each flow channel 3 must be machined to be excessively long in order to allow the flow to pass through a sufficient heat dissipation area, resulting in a significant increase in the cumulative error and deformation risk during the machining process, and a higher scrap rate. At the same time, too few flow channels 3 will inevitably lead to insufficient total heat dissipation area and uneven flow distribution. Conversely, if the number of flow channels 3 is too large (e.g., more than 7), in order to accommodate more flow channels 3 in a limited space, the rib walls between the flow channels 3 will become too thin. This will severely weaken the strength of the shell structure, make high-precision milling extremely difficult and costly, and easily cause flow distribution disorder. Therefore, after comprehensive consideration, the preferred number of flow channels 3 is 4 to 6, which can ensure sufficient heat dissipation area and reasonable flow length while maintaining the structural rigidity of the rib walls and the feasibility of machining.

[0032] The inflow zone 4 and the outflow zone 5 are annular cavities formed by the inner wall of the secondary shell 2 and the surface of the unprocessed flow channel 3 on the main shell 1. An inflow port 7 communicating with the inflow zone 4 and an outflow port 8 communicating with the outflow zone 5 are respectively installed on the secondary shell 2. The cooling medium enters the inflow zone 4 through the inflow port 7, is evenly distributed within the annular cavity, and then enters the spiral flow channel 3. The medium spirals axially within the spiral flow channel 3, fully absorbing the heat conducted from the inner wall of the main shell 1. The heat-absorbing medium enters the annular cavity of the outflow zone 5 from the end of the spiral flow channel 3, collects, and finally exits from the outflow port 8.

[0033] Furthermore, as another embodiment of the flow channel structure, multiple pre-installed inflow ports 7 and outflow ports 8 are installed around the corresponding positions of the inflow area 4 and outflow area 5 in the circumferential direction of the housing. These ports can be threaded holes or standard quick-connect fittings. During actual installation, based on the installation orientation of the servo motor in the equipment and the most convenient routing path for the external cooling pipes, only one pair of inflow ports 7 and outflow ports 8 are selected and connected to the external pipes via connectors. The remaining unselected ports are completely sealed using matching threaded plugs or sealing plugs to prevent leakage. This design allows the same servo motor housing to adapt to installation requirements with different inflow and outflow directions, eliminating the need to customize different housings for different interface requirements, greatly improving product versatility and customer installation convenience.

[0034] Based on the aforementioned housing flow channel 3 structure, this application also provides a novel servo motor with high-efficiency heat dissipation. This servo motor integrates the aforementioned heat dissipation cavity and parallel spiral flow channels 3 within its housing. The cooling medium enters from the inlet 7, is evenly distributed through the annular inlet area 4, and then flows in parallel through multiple spiral flow channels 3. During this process, it fully absorbs the heat generated by gear transmission and finally discharges through the outlet area 5. This design enables the servo motor to achieve a significant active cooling effect: its heat dissipation capacity is doubled, effectively controlling the core operating temperature; the structure is highly integrated, eliminating the need for an external cooler; and with the selectively connectable annular interface, it can flexibly adapt to the direction of external piping during installation, greatly improving the overall reliability, compactness, and layout adaptability of the machine.

[0035] The scope of protection of this invention includes, but is not limited to, the above embodiments. The scope of protection of this invention is defined by the claims. Any substitutions, modifications, or improvements to this technology that are easily conceived by those skilled in the art fall within the scope of protection of this invention.

Claims

1. A housing flow channel structure, comprising a housing, wherein the housing is provided with a closed heat dissipation cavity, characterized in that, The heat dissipation cavity is divided into a heat absorption zone (6) in the middle and an inflow zone (4) and an outflow zone (5) on both sides along the axial direction of the housing. The inflow zone (4) and the outflow zone (5) are annular structures arranged around the axis of the housing. The heat absorption zone (6) is provided with at least two flow channels (3) that connect the inflow zone (4) and the outflow zone (5). Each flow channel (3) connects the inflow zone (4) and the outflow zone (5) independently and in parallel. The housing is provided with an inflow interface (7) that connects the inflow zone (4) and an outflow interface (8) that connects the outflow zone (5).

2. The shell flow channel structure according to claim 1, characterized in that, The flow channel (3) is a spiral flow channel (3).

3. The shell flow channel structure according to claim 1, characterized in that, The number of channels (3) is 4 to 6.

4. The shell flow channel structure according to claim 1, characterized in that, There are multiple inflow ports (7) and / or outflow ports (8), each inflow port (7) and / or outflow port (8) being configured to selectively connect to an external pipeline or be sealed by a plug.

5. The shell flow channel structure according to claim 1, characterized in that, The housing includes a main housing (1) and a secondary housing (2). The main housing (1) and the secondary housing (2) are assembled to form the inflow area (4), the heat absorption area (6) and the outflow area (5). The main housing (1) is integrally formed from metal material, and the flow channel (3) is formed on the outer peripheral surface of the main housing (1) by machining.

6. A servo motor, characterized in that, Includes the shell flow channel structure as described in any one of claims 1 to 5.

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